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Annotation of mandoc/roff.c, Revision 1.309

1.309   ! schwarze    1: /*     $Id: roff.c,v 1.308 2017/06/13 13:51:11 schwarze Exp $ */
1.1       kristaps    2: /*
1.267     schwarze    3:  * Copyright (c) 2008-2012, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
1.287     schwarze    4:  * Copyright (c) 2010-2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
1.1       kristaps    5:  *
                      6:  * Permission to use, copy, modify, and distribute this software for any
1.66      kristaps    7:  * purpose with or without fee is hereby granted, provided that the above
                      8:  * copyright notice and this permission notice appear in all copies.
1.1       kristaps    9:  *
1.106     kristaps   10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.66      kristaps   11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.106     kristaps   12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.66      kristaps   13:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     14:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     15:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     16:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1       kristaps   17:  */
1.66      kristaps   18: #include "config.h"
1.225     schwarze   19:
                     20: #include <sys/types.h>
1.30      kristaps   21:
1.67      kristaps   22: #include <assert.h>
1.85      kristaps   23: #include <ctype.h>
1.245     schwarze   24: #include <limits.h>
1.295     schwarze   25: #include <stddef.h>
                     26: #include <stdint.h>
1.178     schwarze   27: #include <stdio.h>
1.1       kristaps   28: #include <stdlib.h>
1.67      kristaps   29: #include <string.h>
1.1       kristaps   30:
1.67      kristaps   31: #include "mandoc.h"
1.201     schwarze   32: #include "mandoc_aux.h"
1.295     schwarze   33: #include "mandoc_ohash.h"
1.265     schwarze   34: #include "roff.h"
1.226     schwarze   35: #include "libmandoc.h"
1.266     schwarze   36: #include "roff_int.h"
1.109     kristaps   37: #include "libroff.h"
1.82      kristaps   38:
1.170     schwarze   39: /* Maximum number of string expansions per line, to break infinite loops. */
                     40: #define        EXPAND_LIMIT    1000
                     41:
1.266     schwarze   42: /* --- data types --------------------------------------------------------- */
                     43:
1.147     kristaps   44: /*
1.167     kristaps   45:  * An incredibly-simple string buffer.
                     46:  */
1.94      kristaps   47: struct roffstr {
1.167     kristaps   48:        char            *p; /* nil-terminated buffer */
                     49:        size_t           sz; /* saved strlen(p) */
1.166     kristaps   50: };
                     51:
                     52: /*
1.167     kristaps   53:  * A key-value roffstr pair as part of a singly-linked list.
1.166     kristaps   54:  */
                     55: struct roffkv {
                     56:        struct roffstr   key;
                     57:        struct roffstr   val;
                     58:        struct roffkv   *next; /* next in list */
1.94      kristaps   59: };
                     60:
1.180     schwarze   61: /*
                     62:  * A single number register as part of a singly-linked list.
                     63:  */
                     64: struct roffreg {
                     65:        struct roffstr   key;
1.181     schwarze   66:        int              val;
1.180     schwarze   67:        struct roffreg  *next;
                     68: };
                     69:
1.295     schwarze   70: /*
                     71:  * Association of request and macro names with token IDs.
                     72:  */
                     73: struct roffreq {
                     74:        enum roff_tok    tok;
                     75:        char             name[];
                     76: };
                     77:
1.67      kristaps   78: struct roff {
1.128     kristaps   79:        struct mparse   *parse; /* parse point */
1.296     schwarze   80:        struct roff_man *man; /* mdoc or man parser */
1.67      kristaps   81:        struct roffnode *last; /* leaf of stack */
1.223     schwarze   82:        int             *rstack; /* stack of inverted `ie' values */
1.295     schwarze   83:        struct ohash    *reqtab; /* request lookup table */
1.180     schwarze   84:        struct roffreg  *regtab; /* number registers */
1.166     kristaps   85:        struct roffkv   *strtab; /* user-defined strings & macros */
1.306     schwarze   86:        struct roffkv   *rentab; /* renamed strings & macros */
1.167     kristaps   87:        struct roffkv   *xmbtab; /* multi-byte trans table (`tr') */
                     88:        struct roffstr  *xtab; /* single-byte trans table (`tr') */
1.106     kristaps   89:        const char      *current_string; /* value of last called user macro */
1.118     kristaps   90:        struct tbl_node *first_tbl; /* first table parsed */
                     91:        struct tbl_node *last_tbl; /* last table parsed */
                     92:        struct tbl_node *tbl; /* current table being parsed */
1.125     kristaps   93:        struct eqn_node *last_eqn; /* last equation parsed */
                     94:        struct eqn_node *first_eqn; /* first equation parsed */
                     95:        struct eqn_node *eqn; /* current equation being parsed */
1.230     schwarze   96:        int              eqn_inline; /* current equation is inline */
1.223     schwarze   97:        int              options; /* parse options */
                     98:        int              rstacksz; /* current size limit of rstack */
                     99:        int              rstackpos; /* position in rstack */
1.227     schwarze  100:        int              format; /* current file in mdoc or man format */
1.273     schwarze  101:        int              argc; /* number of args of the last macro */
1.223     schwarze  102:        char             control; /* control character */
1.303     schwarze  103:        char             escape; /* escape character */
1.79      kristaps  104: };
                    105:
1.67      kristaps  106: struct roffnode {
1.294     schwarze  107:        enum roff_tok    tok; /* type of node */
1.67      kristaps  108:        struct roffnode *parent; /* up one in stack */
                    109:        int              line; /* parse line */
                    110:        int              col; /* parse col */
1.106     kristaps  111:        char            *name; /* node name, e.g. macro name */
1.79      kristaps  112:        char            *end; /* end-rules: custom token */
                    113:        int              endspan; /* end-rules: next-line or infty */
1.198     schwarze  114:        int              rule; /* current evaluation rule */
1.67      kristaps  115: };
                    116:
                    117: #define        ROFF_ARGS        struct roff *r, /* parse ctx */ \
1.294     schwarze  118:                         enum roff_tok tok, /* tok of macro */ \
1.238     schwarze  119:                         struct buf *buf, /* input buffer */ \
1.67      kristaps  120:                         int ln, /* parse line */ \
1.75      kristaps  121:                         int ppos, /* original pos in buffer */ \
                    122:                         int pos, /* current pos in buffer */ \
1.74      kristaps  123:                         int *offs /* reset offset of buffer data */
1.67      kristaps  124:
                    125: typedef        enum rofferr (*roffproc)(ROFF_ARGS);
                    126:
                    127: struct roffmac {
1.79      kristaps  128:        roffproc         proc; /* process new macro */
                    129:        roffproc         text; /* process as child text of macro */
                    130:        roffproc         sub; /* process as child of macro */
                    131:        int              flags;
                    132: #define        ROFFMAC_STRUCT  (1 << 0) /* always interpret */
1.67      kristaps  133: };
                    134:
1.141     kristaps  135: struct predef {
                    136:        const char      *name; /* predefined input name */
                    137:        const char      *str; /* replacement symbol */
                    138: };
                    139:
                    140: #define        PREDEF(__name, __str) \
                    141:        { (__name), (__str) },
                    142:
1.266     schwarze  143: /* --- function prototypes ------------------------------------------------ */
                    144:
1.155     kristaps  145: static void             roffnode_cleanscope(struct roff *);
                    146: static void             roffnode_pop(struct roff *);
1.294     schwarze  147: static void             roffnode_push(struct roff *, enum roff_tok,
1.155     kristaps  148:                                const char *, int, int);
1.80      kristaps  149: static enum rofferr     roff_block(ROFF_ARGS);
                    150: static enum rofferr     roff_block_text(ROFF_ARGS);
                    151: static enum rofferr     roff_block_sub(ROFF_ARGS);
1.296     schwarze  152: static enum rofferr     roff_br(ROFF_ARGS);
1.80      kristaps  153: static enum rofferr     roff_cblock(ROFF_ARGS);
1.174     kristaps  154: static enum rofferr     roff_cc(ROFF_ARGS);
1.195     schwarze  155: static void             roff_ccond(struct roff *, int, int);
1.82      kristaps  156: static enum rofferr     roff_cond(ROFF_ARGS);
                    157: static enum rofferr     roff_cond_text(ROFF_ARGS);
                    158: static enum rofferr     roff_cond_sub(ROFF_ARGS);
1.92      schwarze  159: static enum rofferr     roff_ds(ROFF_ARGS);
1.303     schwarze  160: static enum rofferr     roff_ec(ROFF_ARGS);
                    161: static enum rofferr     roff_eo(ROFF_ARGS);
1.238     schwarze  162: static enum rofferr     roff_eqndelim(struct roff *, struct buf *, int);
1.271     schwarze  163: static int              roff_evalcond(struct roff *r, int, char *, int *);
1.234     kristaps  164: static int              roff_evalnum(struct roff *, int,
                    165:                                const char *, int *, int *, int);
                    166: static int              roff_evalpar(struct roff *, int,
1.261     schwarze  167:                                const char *, int *, int *, int);
1.198     schwarze  168: static int              roff_evalstrcond(const char *, int *);
1.155     kristaps  169: static void             roff_free1(struct roff *);
1.180     schwarze  170: static void             roff_freereg(struct roffreg *);
1.167     kristaps  171: static void             roff_freestr(struct roffkv *);
1.212     schwarze  172: static size_t           roff_getname(struct roff *, char **, int, int);
1.261     schwarze  173: static int              roff_getnum(const char *, int *, int *, int);
1.184     schwarze  174: static int              roff_getop(const char *, int *, char *);
1.181     schwarze  175: static int              roff_getregn(const struct roff *,
                    176:                                const char *, size_t);
1.273     schwarze  177: static int              roff_getregro(const struct roff *,
                    178:                                const char *name);
1.306     schwarze  179: static const char      *roff_getrenn(const struct roff *,
                    180:                                const char *, size_t);
1.207     schwarze  181: static const char      *roff_getstrn(const struct roff *,
1.94      kristaps  182:                                const char *, size_t);
1.271     schwarze  183: static int              roff_hasregn(const struct roff *,
                    184:                                const char *, size_t);
1.251     schwarze  185: static enum rofferr     roff_insec(ROFF_ARGS);
1.178     schwarze  186: static enum rofferr     roff_it(ROFF_ARGS);
1.103     kristaps  187: static enum rofferr     roff_line_ignore(ROFF_ARGS);
1.265     schwarze  188: static void             roff_man_alloc1(struct roff_man *);
                    189: static void             roff_man_free1(struct roff_man *);
1.300     schwarze  190: static enum rofferr     roff_manyarg(ROFF_ARGS);
1.89      kristaps  191: static enum rofferr     roff_nr(ROFF_ARGS);
1.297     schwarze  192: static enum rofferr     roff_onearg(ROFF_ARGS);
1.294     schwarze  193: static enum roff_tok    roff_parse(struct roff *, char *, int *,
1.214     schwarze  194:                                int, int);
1.305     schwarze  195: static enum rofferr     roff_parsetext(struct roff *, struct buf *,
                    196:                                int, int *);
1.306     schwarze  197: static enum rofferr     roff_renamed(ROFF_ARGS);
1.238     schwarze  198: static enum rofferr     roff_res(struct roff *, struct buf *, int, int);
1.122     schwarze  199: static enum rofferr     roff_rm(ROFF_ARGS);
1.306     schwarze  200: static enum rofferr     roff_rn(ROFF_ARGS);
1.203     schwarze  201: static enum rofferr     roff_rr(ROFF_ARGS);
1.94      kristaps  202: static void             roff_setstr(struct roff *,
1.106     kristaps  203:                                const char *, const char *, int);
1.207     schwarze  204: static void             roff_setstrn(struct roffkv **, const char *,
1.164     kristaps  205:                                size_t, const char *, size_t, int);
1.105     kristaps  206: static enum rofferr     roff_so(ROFF_ARGS);
1.164     kristaps  207: static enum rofferr     roff_tr(ROFF_ARGS);
1.175     schwarze  208: static enum rofferr     roff_Dd(ROFF_ARGS);
                    209: static enum rofferr     roff_TH(ROFF_ARGS);
1.109     kristaps  210: static enum rofferr     roff_TE(ROFF_ARGS);
                    211: static enum rofferr     roff_TS(ROFF_ARGS);
1.125     kristaps  212: static enum rofferr     roff_EQ(ROFF_ARGS);
                    213: static enum rofferr     roff_EN(ROFF_ARGS);
1.112     kristaps  214: static enum rofferr     roff_T_(ROFF_ARGS);
1.251     schwarze  215: static enum rofferr     roff_unsupp(ROFF_ARGS);
1.106     kristaps  216: static enum rofferr     roff_userdef(ROFF_ARGS);
1.67      kristaps  217:
1.266     schwarze  218: /* --- constant data ------------------------------------------------------ */
                    219:
1.261     schwarze  220: #define        ROFFNUM_SCALE   (1 << 0)  /* Honour scaling in roff_getnum(). */
                    221: #define        ROFFNUM_WHITE   (1 << 1)  /* Skip whitespace in roff_evalnum(). */
                    222:
1.294     schwarze  223: const char *__roff_name[MAN_MAX + 1] = {
1.305     schwarze  224:        "br",           "ce",           "ft",           "ll",
1.309   ! schwarze  225:        "mc",           "rj",           "sp",           "ta",
        !           226:        "ti",           NULL,
1.294     schwarze  227:        "ab",           "ad",           "af",           "aln",
                    228:        "als",          "am",           "am1",          "ami",
                    229:        "ami1",         "as",           "as1",          "asciify",
                    230:        "backtrace",    "bd",           "bleedat",      "blm",
                    231:         "box",         "boxa",         "bp",           "BP",
                    232:        "break",        "breakchar",    "brnl",         "brp",
1.305     schwarze  233:        "brpnl",        "c2",           "cc",
1.294     schwarze  234:        "cf",           "cflags",       "ch",           "char",
                    235:        "chop",         "class",        "close",        "CL",
                    236:        "color",        "composite",    "continue",     "cp",
                    237:        "cropat",       "cs",           "cu",           "da",
                    238:        "dch",          "Dd",           "de",           "de1",
                    239:        "defcolor",     "dei",          "dei1",         "device",
                    240:        "devicem",      "di",           "do",           "ds",
                    241:        "ds1",          "dwh",          "dt",           "ec",
                    242:        "ecr",          "ecs",          "el",           "em",
                    243:        "EN",           "eo",           "EP",           "EQ",
                    244:        "errprint",     "ev",           "evc",          "ex",
                    245:        "fallback",     "fam",          "fc",           "fchar",
                    246:        "fcolor",       "fdeferlig",    "feature",      "fkern",
                    247:        "fl",           "flig",         "fp",           "fps",
                    248:        "fschar",       "fspacewidth",  "fspecial",     "ftr",
                    249:        "fzoom",        "gcolor",       "hc",           "hcode",
                    250:        "hidechar",     "hla",          "hlm",          "hpf",
                    251:        "hpfa",         "hpfcode",      "hw",           "hy",
                    252:        "hylang",       "hylen",        "hym",          "hypp",
                    253:        "hys",          "ie",           "if",           "ig",
                    254:        "index",        "it",           "itc",          "IX",
                    255:        "kern",         "kernafter",    "kernbefore",   "kernpair",
                    256:        "lc",           "lc_ctype",     "lds",          "length",
                    257:        "letadj",       "lf",           "lg",           "lhang",
                    258:        "linetabs",     "lnr",          "lnrf",         "lpfx",
1.304     schwarze  259:        "ls",           "lsm",          "lt",
1.294     schwarze  260:        "mediasize",    "minss",        "mk",           "mso",
                    261:        "na",           "ne",           "nh",           "nhychar",
                    262:        "nm",           "nn",           "nop",          "nr",
                    263:        "nrf",          "nroff",        "ns",           "nx",
                    264:        "open",         "opena",        "os",           "output",
                    265:        "padj",         "papersize",    "pc",           "pev",
                    266:        "pi",           "PI",           "pl",           "pm",
                    267:        "pn",           "pnr",          "po",           "ps",
                    268:        "psbb",         "pshape",       "pso",          "ptr",
                    269:        "pvs",          "rchar",        "rd",           "recursionlimit",
1.309   ! schwarze  270:        "return",       "rfschar",      "rhang",
1.294     schwarze  271:        "rm",           "rn",           "rnn",          "rr",
                    272:        "rs",           "rt",           "schar",        "sentchar",
                    273:        "shc",          "shift",        "sizes",        "so",
                    274:        "spacewidth",   "special",      "spreadwarn",   "ss",
                    275:        "sty",          "substring",    "sv",           "sy",
1.300     schwarze  276:        "T&",           "tc",           "TE",
1.301     schwarze  277:        "TH",           "tkf",          "tl",
1.294     schwarze  278:        "tm",           "tm1",          "tmc",          "tr",
                    279:        "track",        "transchar",    "trf",          "trimat",
                    280:        "trin",         "trnt",         "troff",        "TS",
                    281:        "uf",           "ul",           "unformat",     "unwatch",
                    282:        "unwatchn",     "vpt",          "vs",           "warn",
                    283:        "warnscale",    "watch",        "watchlength",  "watchn",
                    284:        "wh",           "while",        "write",        "writec",
                    285:        "writem",       "xflag",        ".",            NULL,
1.306     schwarze  286:        NULL,           "text",
1.294     schwarze  287:        "Dd",           "Dt",           "Os",           "Sh",
                    288:        "Ss",           "Pp",           "D1",           "Dl",
                    289:        "Bd",           "Ed",           "Bl",           "El",
                    290:        "It",           "Ad",           "An",           "Ap",
                    291:        "Ar",           "Cd",           "Cm",           "Dv",
                    292:        "Er",           "Ev",           "Ex",           "Fa",
                    293:        "Fd",           "Fl",           "Fn",           "Ft",
                    294:        "Ic",           "In",           "Li",           "Nd",
                    295:        "Nm",           "Op",           "Ot",           "Pa",
                    296:        "Rv",           "St",           "Va",           "Vt",
                    297:        "Xr",           "%A",           "%B",           "%D",
                    298:        "%I",           "%J",           "%N",           "%O",
                    299:        "%P",           "%R",           "%T",           "%V",
                    300:        "Ac",           "Ao",           "Aq",           "At",
                    301:        "Bc",           "Bf",           "Bo",           "Bq",
                    302:        "Bsx",          "Bx",           "Db",           "Dc",
                    303:        "Do",           "Dq",           "Ec",           "Ef",
                    304:        "Em",           "Eo",           "Fx",           "Ms",
                    305:        "No",           "Ns",           "Nx",           "Ox",
                    306:        "Pc",           "Pf",           "Po",           "Pq",
                    307:        "Qc",           "Ql",           "Qo",           "Qq",
                    308:        "Re",           "Rs",           "Sc",           "So",
                    309:        "Sq",           "Sm",           "Sx",           "Sy",
                    310:        "Tn",           "Ux",           "Xc",           "Xo",
                    311:        "Fo",           "Fc",           "Oo",           "Oc",
                    312:        "Bk",           "Ek",           "Bt",           "Hf",
                    313:        "Fr",           "Ud",           "Lb",           "Lp",
                    314:        "Lk",           "Mt",           "Brq",          "Bro",
                    315:        "Brc",          "%C",           "Es",           "En",
1.299     schwarze  316:        "Dx",           "%Q",           "%U",           "Ta",
                    317:        NULL,
1.294     schwarze  318:        "TH",           "SH",           "SS",           "TP",
                    319:        "LP",           "PP",           "P",            "IP",
                    320:        "HP",           "SM",           "SB",           "BI",
                    321:        "IB",           "BR",           "RB",           "R",
                    322:        "B",            "I",            "IR",           "RI",
1.299     schwarze  323:        "nf",           "fi",
1.294     schwarze  324:        "RE",           "RS",           "DT",           "UC",
1.297     schwarze  325:        "PD",           "AT",           "in",
1.294     schwarze  326:        "OP",           "EX",           "EE",           "UR",
1.298     schwarze  327:        "UE",           NULL
1.294     schwarze  328: };
                    329: const  char *const *roff_name = __roff_name;
                    330:
                    331: static struct roffmac   roffs[TOKEN_NONE] = {
1.296     schwarze  332:        { roff_br, NULL, NULL, 0 },  /* br */
1.305     schwarze  333:        { roff_onearg, NULL, NULL, 0 },  /* ce */
1.297     schwarze  334:        { roff_onearg, NULL, NULL, 0 },  /* ft */
1.298     schwarze  335:        { roff_onearg, NULL, NULL, 0 },  /* ll */
1.304     schwarze  336:        { roff_onearg, NULL, NULL, 0 },  /* mc */
1.309   ! schwarze  337:        { roff_onearg, NULL, NULL, 0 },  /* rj */
1.299     schwarze  338:        { roff_onearg, NULL, NULL, 0 },  /* sp */
1.300     schwarze  339:        { roff_manyarg, NULL, NULL, 0 },  /* ta */
1.301     schwarze  340:        { roff_onearg, NULL, NULL, 0 },  /* ti */
1.296     schwarze  341:        { NULL, NULL, NULL, 0 },  /* ROFF_MAX */
1.295     schwarze  342:        { roff_unsupp, NULL, NULL, 0 },  /* ab */
                    343:        { roff_line_ignore, NULL, NULL, 0 },  /* ad */
                    344:        { roff_line_ignore, NULL, NULL, 0 },  /* af */
                    345:        { roff_unsupp, NULL, NULL, 0 },  /* aln */
                    346:        { roff_unsupp, NULL, NULL, 0 },  /* als */
                    347:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* am */
                    348:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* am1 */
                    349:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* ami */
                    350:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* ami1 */
                    351:        { roff_ds, NULL, NULL, 0 },  /* as */
                    352:        { roff_ds, NULL, NULL, 0 },  /* as1 */
                    353:        { roff_unsupp, NULL, NULL, 0 },  /* asciify */
                    354:        { roff_line_ignore, NULL, NULL, 0 },  /* backtrace */
                    355:        { roff_line_ignore, NULL, NULL, 0 },  /* bd */
                    356:        { roff_line_ignore, NULL, NULL, 0 },  /* bleedat */
                    357:        { roff_unsupp, NULL, NULL, 0 },  /* blm */
                    358:        { roff_unsupp, NULL, NULL, 0 },  /* box */
                    359:        { roff_unsupp, NULL, NULL, 0 },  /* boxa */
                    360:        { roff_line_ignore, NULL, NULL, 0 },  /* bp */
                    361:        { roff_unsupp, NULL, NULL, 0 },  /* BP */
                    362:        { roff_unsupp, NULL, NULL, 0 },  /* break */
                    363:        { roff_line_ignore, NULL, NULL, 0 },  /* breakchar */
                    364:        { roff_line_ignore, NULL, NULL, 0 },  /* brnl */
1.296     schwarze  365:        { roff_br, NULL, NULL, 0 },  /* brp */
1.295     schwarze  366:        { roff_line_ignore, NULL, NULL, 0 },  /* brpnl */
                    367:        { roff_unsupp, NULL, NULL, 0 },  /* c2 */
                    368:        { roff_cc, NULL, NULL, 0 },  /* cc */
                    369:        { roff_insec, NULL, NULL, 0 },  /* cf */
                    370:        { roff_line_ignore, NULL, NULL, 0 },  /* cflags */
                    371:        { roff_line_ignore, NULL, NULL, 0 },  /* ch */
                    372:        { roff_unsupp, NULL, NULL, 0 },  /* char */
                    373:        { roff_unsupp, NULL, NULL, 0 },  /* chop */
                    374:        { roff_line_ignore, NULL, NULL, 0 },  /* class */
                    375:        { roff_insec, NULL, NULL, 0 },  /* close */
                    376:        { roff_unsupp, NULL, NULL, 0 },  /* CL */
                    377:        { roff_line_ignore, NULL, NULL, 0 },  /* color */
                    378:        { roff_unsupp, NULL, NULL, 0 },  /* composite */
                    379:        { roff_unsupp, NULL, NULL, 0 },  /* continue */
                    380:        { roff_line_ignore, NULL, NULL, 0 },  /* cp */
                    381:        { roff_line_ignore, NULL, NULL, 0 },  /* cropat */
                    382:        { roff_line_ignore, NULL, NULL, 0 },  /* cs */
                    383:        { roff_line_ignore, NULL, NULL, 0 },  /* cu */
                    384:        { roff_unsupp, NULL, NULL, 0 },  /* da */
                    385:        { roff_unsupp, NULL, NULL, 0 },  /* dch */
                    386:        { roff_Dd, NULL, NULL, 0 },  /* Dd */
                    387:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* de */
                    388:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* de1 */
                    389:        { roff_line_ignore, NULL, NULL, 0 },  /* defcolor */
                    390:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* dei */
                    391:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* dei1 */
                    392:        { roff_unsupp, NULL, NULL, 0 },  /* device */
                    393:        { roff_unsupp, NULL, NULL, 0 },  /* devicem */
                    394:        { roff_unsupp, NULL, NULL, 0 },  /* di */
                    395:        { roff_unsupp, NULL, NULL, 0 },  /* do */
                    396:        { roff_ds, NULL, NULL, 0 },  /* ds */
                    397:        { roff_ds, NULL, NULL, 0 },  /* ds1 */
                    398:        { roff_unsupp, NULL, NULL, 0 },  /* dwh */
                    399:        { roff_unsupp, NULL, NULL, 0 },  /* dt */
1.303     schwarze  400:        { roff_ec, NULL, NULL, 0 },  /* ec */
1.295     schwarze  401:        { roff_unsupp, NULL, NULL, 0 },  /* ecr */
                    402:        { roff_unsupp, NULL, NULL, 0 },  /* ecs */
                    403:        { roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT },  /* el */
                    404:        { roff_unsupp, NULL, NULL, 0 },  /* em */
                    405:        { roff_EN, NULL, NULL, 0 },  /* EN */
1.303     schwarze  406:        { roff_eo, NULL, NULL, 0 },  /* eo */
1.295     schwarze  407:        { roff_unsupp, NULL, NULL, 0 },  /* EP */
                    408:        { roff_EQ, NULL, NULL, 0 },  /* EQ */
                    409:        { roff_line_ignore, NULL, NULL, 0 },  /* errprint */
                    410:        { roff_unsupp, NULL, NULL, 0 },  /* ev */
                    411:        { roff_unsupp, NULL, NULL, 0 },  /* evc */
                    412:        { roff_unsupp, NULL, NULL, 0 },  /* ex */
                    413:        { roff_line_ignore, NULL, NULL, 0 },  /* fallback */
                    414:        { roff_line_ignore, NULL, NULL, 0 },  /* fam */
                    415:        { roff_unsupp, NULL, NULL, 0 },  /* fc */
                    416:        { roff_unsupp, NULL, NULL, 0 },  /* fchar */
                    417:        { roff_line_ignore, NULL, NULL, 0 },  /* fcolor */
                    418:        { roff_line_ignore, NULL, NULL, 0 },  /* fdeferlig */
                    419:        { roff_line_ignore, NULL, NULL, 0 },  /* feature */
                    420:        { roff_line_ignore, NULL, NULL, 0 },  /* fkern */
                    421:        { roff_line_ignore, NULL, NULL, 0 },  /* fl */
                    422:        { roff_line_ignore, NULL, NULL, 0 },  /* flig */
                    423:        { roff_line_ignore, NULL, NULL, 0 },  /* fp */
                    424:        { roff_line_ignore, NULL, NULL, 0 },  /* fps */
                    425:        { roff_unsupp, NULL, NULL, 0 },  /* fschar */
                    426:        { roff_line_ignore, NULL, NULL, 0 },  /* fspacewidth */
                    427:        { roff_line_ignore, NULL, NULL, 0 },  /* fspecial */
                    428:        { roff_line_ignore, NULL, NULL, 0 },  /* ftr */
                    429:        { roff_line_ignore, NULL, NULL, 0 },  /* fzoom */
                    430:        { roff_line_ignore, NULL, NULL, 0 },  /* gcolor */
                    431:        { roff_line_ignore, NULL, NULL, 0 },  /* hc */
                    432:        { roff_line_ignore, NULL, NULL, 0 },  /* hcode */
                    433:        { roff_line_ignore, NULL, NULL, 0 },  /* hidechar */
                    434:        { roff_line_ignore, NULL, NULL, 0 },  /* hla */
                    435:        { roff_line_ignore, NULL, NULL, 0 },  /* hlm */
                    436:        { roff_line_ignore, NULL, NULL, 0 },  /* hpf */
                    437:        { roff_line_ignore, NULL, NULL, 0 },  /* hpfa */
                    438:        { roff_line_ignore, NULL, NULL, 0 },  /* hpfcode */
                    439:        { roff_line_ignore, NULL, NULL, 0 },  /* hw */
                    440:        { roff_line_ignore, NULL, NULL, 0 },  /* hy */
                    441:        { roff_line_ignore, NULL, NULL, 0 },  /* hylang */
                    442:        { roff_line_ignore, NULL, NULL, 0 },  /* hylen */
                    443:        { roff_line_ignore, NULL, NULL, 0 },  /* hym */
                    444:        { roff_line_ignore, NULL, NULL, 0 },  /* hypp */
                    445:        { roff_line_ignore, NULL, NULL, 0 },  /* hys */
                    446:        { roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT },  /* ie */
                    447:        { roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT },  /* if */
                    448:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* ig */
                    449:        { roff_unsupp, NULL, NULL, 0 },  /* index */
                    450:        { roff_it, NULL, NULL, 0 },  /* it */
                    451:        { roff_unsupp, NULL, NULL, 0 },  /* itc */
                    452:        { roff_line_ignore, NULL, NULL, 0 },  /* IX */
                    453:        { roff_line_ignore, NULL, NULL, 0 },  /* kern */
                    454:        { roff_line_ignore, NULL, NULL, 0 },  /* kernafter */
                    455:        { roff_line_ignore, NULL, NULL, 0 },  /* kernbefore */
                    456:        { roff_line_ignore, NULL, NULL, 0 },  /* kernpair */
                    457:        { roff_unsupp, NULL, NULL, 0 },  /* lc */
                    458:        { roff_unsupp, NULL, NULL, 0 },  /* lc_ctype */
                    459:        { roff_unsupp, NULL, NULL, 0 },  /* lds */
                    460:        { roff_unsupp, NULL, NULL, 0 },  /* length */
                    461:        { roff_line_ignore, NULL, NULL, 0 },  /* letadj */
                    462:        { roff_insec, NULL, NULL, 0 },  /* lf */
                    463:        { roff_line_ignore, NULL, NULL, 0 },  /* lg */
                    464:        { roff_line_ignore, NULL, NULL, 0 },  /* lhang */
                    465:        { roff_unsupp, NULL, NULL, 0 },  /* linetabs */
                    466:        { roff_unsupp, NULL, NULL, 0 },  /* lnr */
                    467:        { roff_unsupp, NULL, NULL, 0 },  /* lnrf */
                    468:        { roff_unsupp, NULL, NULL, 0 },  /* lpfx */
                    469:        { roff_line_ignore, NULL, NULL, 0 },  /* ls */
                    470:        { roff_unsupp, NULL, NULL, 0 },  /* lsm */
                    471:        { roff_line_ignore, NULL, NULL, 0 },  /* lt */
                    472:        { roff_line_ignore, NULL, NULL, 0 },  /* mediasize */
                    473:        { roff_line_ignore, NULL, NULL, 0 },  /* minss */
                    474:        { roff_line_ignore, NULL, NULL, 0 },  /* mk */
                    475:        { roff_insec, NULL, NULL, 0 },  /* mso */
                    476:        { roff_line_ignore, NULL, NULL, 0 },  /* na */
                    477:        { roff_line_ignore, NULL, NULL, 0 },  /* ne */
                    478:        { roff_line_ignore, NULL, NULL, 0 },  /* nh */
                    479:        { roff_line_ignore, NULL, NULL, 0 },  /* nhychar */
                    480:        { roff_unsupp, NULL, NULL, 0 },  /* nm */
                    481:        { roff_unsupp, NULL, NULL, 0 },  /* nn */
                    482:        { roff_unsupp, NULL, NULL, 0 },  /* nop */
                    483:        { roff_nr, NULL, NULL, 0 },  /* nr */
                    484:        { roff_unsupp, NULL, NULL, 0 },  /* nrf */
                    485:        { roff_line_ignore, NULL, NULL, 0 },  /* nroff */
                    486:        { roff_line_ignore, NULL, NULL, 0 },  /* ns */
                    487:        { roff_insec, NULL, NULL, 0 },  /* nx */
                    488:        { roff_insec, NULL, NULL, 0 },  /* open */
                    489:        { roff_insec, NULL, NULL, 0 },  /* opena */
                    490:        { roff_line_ignore, NULL, NULL, 0 },  /* os */
                    491:        { roff_unsupp, NULL, NULL, 0 },  /* output */
                    492:        { roff_line_ignore, NULL, NULL, 0 },  /* padj */
                    493:        { roff_line_ignore, NULL, NULL, 0 },  /* papersize */
                    494:        { roff_line_ignore, NULL, NULL, 0 },  /* pc */
                    495:        { roff_line_ignore, NULL, NULL, 0 },  /* pev */
                    496:        { roff_insec, NULL, NULL, 0 },  /* pi */
                    497:        { roff_unsupp, NULL, NULL, 0 },  /* PI */
                    498:        { roff_line_ignore, NULL, NULL, 0 },  /* pl */
                    499:        { roff_line_ignore, NULL, NULL, 0 },  /* pm */
                    500:        { roff_line_ignore, NULL, NULL, 0 },  /* pn */
                    501:        { roff_line_ignore, NULL, NULL, 0 },  /* pnr */
                    502:        { roff_line_ignore, NULL, NULL, 0 },  /* po */
                    503:        { roff_line_ignore, NULL, NULL, 0 },  /* ps */
                    504:        { roff_unsupp, NULL, NULL, 0 },  /* psbb */
                    505:        { roff_unsupp, NULL, NULL, 0 },  /* pshape */
                    506:        { roff_insec, NULL, NULL, 0 },  /* pso */
                    507:        { roff_line_ignore, NULL, NULL, 0 },  /* ptr */
                    508:        { roff_line_ignore, NULL, NULL, 0 },  /* pvs */
                    509:        { roff_unsupp, NULL, NULL, 0 },  /* rchar */
                    510:        { roff_line_ignore, NULL, NULL, 0 },  /* rd */
                    511:        { roff_line_ignore, NULL, NULL, 0 },  /* recursionlimit */
                    512:        { roff_unsupp, NULL, NULL, 0 },  /* return */
                    513:        { roff_unsupp, NULL, NULL, 0 },  /* rfschar */
                    514:        { roff_line_ignore, NULL, NULL, 0 },  /* rhang */
                    515:        { roff_rm, NULL, NULL, 0 },  /* rm */
1.306     schwarze  516:        { roff_rn, NULL, NULL, 0 },  /* rn */
1.295     schwarze  517:        { roff_unsupp, NULL, NULL, 0 },  /* rnn */
                    518:        { roff_rr, NULL, NULL, 0 },  /* rr */
                    519:        { roff_line_ignore, NULL, NULL, 0 },  /* rs */
                    520:        { roff_line_ignore, NULL, NULL, 0 },  /* rt */
                    521:        { roff_unsupp, NULL, NULL, 0 },  /* schar */
                    522:        { roff_line_ignore, NULL, NULL, 0 },  /* sentchar */
                    523:        { roff_line_ignore, NULL, NULL, 0 },  /* shc */
                    524:        { roff_unsupp, NULL, NULL, 0 },  /* shift */
                    525:        { roff_line_ignore, NULL, NULL, 0 },  /* sizes */
                    526:        { roff_so, NULL, NULL, 0 },  /* so */
                    527:        { roff_line_ignore, NULL, NULL, 0 },  /* spacewidth */
                    528:        { roff_line_ignore, NULL, NULL, 0 },  /* special */
                    529:        { roff_line_ignore, NULL, NULL, 0 },  /* spreadwarn */
                    530:        { roff_line_ignore, NULL, NULL, 0 },  /* ss */
                    531:        { roff_line_ignore, NULL, NULL, 0 },  /* sty */
                    532:        { roff_unsupp, NULL, NULL, 0 },  /* substring */
                    533:        { roff_line_ignore, NULL, NULL, 0 },  /* sv */
                    534:        { roff_insec, NULL, NULL, 0 },  /* sy */
                    535:        { roff_T_, NULL, NULL, 0 },  /* T& */
                    536:        { roff_unsupp, NULL, NULL, 0 },  /* tc */
                    537:        { roff_TE, NULL, NULL, 0 },  /* TE */
                    538:        { roff_TH, NULL, NULL, 0 },  /* TH */
                    539:        { roff_line_ignore, NULL, NULL, 0 },  /* tkf */
                    540:        { roff_unsupp, NULL, NULL, 0 },  /* tl */
                    541:        { roff_line_ignore, NULL, NULL, 0 },  /* tm */
                    542:        { roff_line_ignore, NULL, NULL, 0 },  /* tm1 */
                    543:        { roff_line_ignore, NULL, NULL, 0 },  /* tmc */
                    544:        { roff_tr, NULL, NULL, 0 },  /* tr */
                    545:        { roff_line_ignore, NULL, NULL, 0 },  /* track */
                    546:        { roff_line_ignore, NULL, NULL, 0 },  /* transchar */
                    547:        { roff_insec, NULL, NULL, 0 },  /* trf */
                    548:        { roff_line_ignore, NULL, NULL, 0 },  /* trimat */
                    549:        { roff_unsupp, NULL, NULL, 0 },  /* trin */
                    550:        { roff_unsupp, NULL, NULL, 0 },  /* trnt */
                    551:        { roff_line_ignore, NULL, NULL, 0 },  /* troff */
                    552:        { roff_TS, NULL, NULL, 0 },  /* TS */
                    553:        { roff_line_ignore, NULL, NULL, 0 },  /* uf */
                    554:        { roff_line_ignore, NULL, NULL, 0 },  /* ul */
                    555:        { roff_unsupp, NULL, NULL, 0 },  /* unformat */
                    556:        { roff_line_ignore, NULL, NULL, 0 },  /* unwatch */
                    557:        { roff_line_ignore, NULL, NULL, 0 },  /* unwatchn */
                    558:        { roff_line_ignore, NULL, NULL, 0 },  /* vpt */
                    559:        { roff_line_ignore, NULL, NULL, 0 },  /* vs */
                    560:        { roff_line_ignore, NULL, NULL, 0 },  /* warn */
                    561:        { roff_line_ignore, NULL, NULL, 0 },  /* warnscale */
                    562:        { roff_line_ignore, NULL, NULL, 0 },  /* watch */
                    563:        { roff_line_ignore, NULL, NULL, 0 },  /* watchlength */
                    564:        { roff_line_ignore, NULL, NULL, 0 },  /* watchn */
                    565:        { roff_unsupp, NULL, NULL, 0 },  /* wh */
                    566:        { roff_unsupp, NULL, NULL, 0 },  /* while */
                    567:        { roff_insec, NULL, NULL, 0 },  /* write */
                    568:        { roff_insec, NULL, NULL, 0 },  /* writec */
                    569:        { roff_insec, NULL, NULL, 0 },  /* writem */
                    570:        { roff_line_ignore, NULL, NULL, 0 },  /* xflag */
                    571:        { roff_cblock, NULL, NULL, 0 },  /* . */
1.306     schwarze  572:        { roff_renamed, NULL, NULL, 0 },
1.295     schwarze  573:        { roff_userdef, NULL, NULL, 0 }
1.67      kristaps  574: };
                    575:
1.200     schwarze  576: /* not currently implemented: Ds em Eq LP Me PP pp Or Rd Sf SH */
1.175     schwarze  577: const  char *const __mdoc_reserved[] = {
                    578:        "Ac", "Ad", "An", "Ao", "Ap", "Aq", "Ar", "At",
                    579:        "Bc", "Bd", "Bf", "Bk", "Bl", "Bo", "Bq",
                    580:        "Brc", "Bro", "Brq", "Bsx", "Bt", "Bx",
                    581:        "Cd", "Cm", "Db", "Dc", "Dd", "Dl", "Do", "Dq",
1.200     schwarze  582:        "Dt", "Dv", "Dx", "D1",
                    583:        "Ec", "Ed", "Ef", "Ek", "El", "Em",
                    584:        "En", "Eo", "Er", "Es", "Ev", "Ex",
1.175     schwarze  585:        "Fa", "Fc", "Fd", "Fl", "Fn", "Fo", "Fr", "Ft", "Fx",
1.200     schwarze  586:        "Hf", "Ic", "In", "It", "Lb", "Li", "Lk", "Lp",
                    587:        "Ms", "Mt", "Nd", "Nm", "No", "Ns", "Nx",
1.175     schwarze  588:        "Oc", "Oo", "Op", "Os", "Ot", "Ox",
1.200     schwarze  589:        "Pa", "Pc", "Pf", "Po", "Pp", "Pq",
                    590:        "Qc", "Ql", "Qo", "Qq", "Re", "Rs", "Rv",
                    591:        "Sc", "Sh", "Sm", "So", "Sq",
1.175     schwarze  592:        "Ss", "St", "Sx", "Sy",
                    593:        "Ta", "Tn", "Ud", "Ux", "Va", "Vt", "Xc", "Xo", "Xr",
1.200     schwarze  594:        "%A", "%B", "%C", "%D", "%I", "%J", "%N", "%O",
1.175     schwarze  595:        "%P", "%Q", "%R", "%T", "%U", "%V",
                    596:        NULL
                    597: };
                    598:
1.200     schwarze  599: /* not currently implemented: BT DE DS ME MT PT SY TQ YS */
1.175     schwarze  600: const  char *const __man_reserved[] = {
1.200     schwarze  601:        "AT", "B", "BI", "BR", "DT",
                    602:        "EE", "EN", "EQ", "EX", "HP", "I", "IB", "IP", "IR",
                    603:        "LP", "OP", "P", "PD", "PP",
                    604:        "R", "RB", "RE", "RI", "RS", "SB", "SH", "SM", "SS",
                    605:        "TE", "TH", "TP", "TS", "T&", "UC", "UE", "UR",
1.175     schwarze  606:        NULL
                    607: };
                    608:
1.141     kristaps  609: /* Array of injected predefined strings. */
                    610: #define        PREDEFS_MAX      38
                    611: static const struct predef predefs[PREDEFS_MAX] = {
                    612: #include "predefs.in"
                    613: };
                    614:
1.305     schwarze  615: static int      roffce_lines;  /* number of input lines to center */
                    616: static struct roff_node *roffce_node;  /* active request */
1.178     schwarze  617: static int      roffit_lines;  /* number of lines to delay */
                    618: static char    *roffit_macro;  /* nil-terminated macro line */
                    619:
1.207     schwarze  620:
1.266     schwarze  621: /* --- request table ------------------------------------------------------ */
                    622:
1.295     schwarze  623: struct ohash *
                    624: roffhash_alloc(enum roff_tok mintok, enum roff_tok maxtok)
1.85      kristaps  625: {
1.295     schwarze  626:        struct ohash    *htab;
                    627:        struct roffreq  *req;
                    628:        enum roff_tok    tok;
                    629:        size_t           sz;
                    630:        unsigned int     slot;
1.85      kristaps  631:
1.295     schwarze  632:        htab = mandoc_malloc(sizeof(*htab));
                    633:        mandoc_ohash_init(htab, 8, offsetof(struct roffreq, name));
1.85      kristaps  634:
1.295     schwarze  635:        for (tok = mintok; tok < maxtok; tok++) {
1.296     schwarze  636:                if (roff_name[tok] == NULL)
                    637:                        continue;
1.295     schwarze  638:                sz = strlen(roff_name[tok]);
                    639:                req = mandoc_malloc(sizeof(*req) + sz + 1);
                    640:                req->tok = tok;
                    641:                memcpy(req->name, roff_name[tok], sz + 1);
                    642:                slot = ohash_qlookup(htab, req->name);
                    643:                ohash_insert(htab, slot, req);
1.85      kristaps  644:        }
1.295     schwarze  645:        return htab;
1.85      kristaps  646: }
                    647:
1.295     schwarze  648: void
                    649: roffhash_free(struct ohash *htab)
1.67      kristaps  650: {
1.295     schwarze  651:        struct roffreq  *req;
                    652:        unsigned int     slot;
1.67      kristaps  653:
1.295     schwarze  654:        if (htab == NULL)
                    655:                return;
                    656:        for (req = ohash_first(htab, &slot); req != NULL;
                    657:             req = ohash_next(htab, &slot))
                    658:                free(req);
                    659:        ohash_delete(htab);
                    660:        free(htab);
                    661: }
                    662:
                    663: enum roff_tok
                    664: roffhash_find(struct ohash *htab, const char *name, size_t sz)
                    665: {
                    666:        struct roffreq  *req;
                    667:        const char      *end;
                    668:
                    669:        if (sz) {
                    670:                end = name + sz;
                    671:                req = ohash_find(htab, ohash_qlookupi(htab, name, &end));
                    672:        } else
                    673:                req = ohash_find(htab, ohash_qlookup(htab, name));
                    674:        return req == NULL ? TOKEN_NONE : req->tok;
1.67      kristaps  675: }
                    676:
1.266     schwarze  677: /* --- stack of request blocks -------------------------------------------- */
                    678:
1.67      kristaps  679: /*
                    680:  * Pop the current node off of the stack of roff instructions currently
                    681:  * pending.
                    682:  */
                    683: static void
                    684: roffnode_pop(struct roff *r)
                    685: {
                    686:        struct roffnode *p;
                    687:
1.75      kristaps  688:        assert(r->last);
1.207     schwarze  689:        p = r->last;
1.82      kristaps  690:
1.75      kristaps  691:        r->last = r->last->parent;
1.106     kristaps  692:        free(p->name);
                    693:        free(p->end);
1.67      kristaps  694:        free(p);
                    695: }
                    696:
                    697: /*
                    698:  * Push a roff node onto the instruction stack.  This must later be
                    699:  * removed with roffnode_pop().
                    700:  */
1.98      schwarze  701: static void
1.294     schwarze  702: roffnode_push(struct roff *r, enum roff_tok tok, const char *name,
1.106     kristaps  703:                int line, int col)
1.67      kristaps  704: {
                    705:        struct roffnode *p;
                    706:
1.98      schwarze  707:        p = mandoc_calloc(1, sizeof(struct roffnode));
1.67      kristaps  708:        p->tok = tok;
1.106     kristaps  709:        if (name)
                    710:                p->name = mandoc_strdup(name);
1.67      kristaps  711:        p->parent = r->last;
                    712:        p->line = line;
                    713:        p->col = col;
1.198     schwarze  714:        p->rule = p->parent ? p->parent->rule : 0;
1.67      kristaps  715:
                    716:        r->last = p;
                    717: }
                    718:
1.266     schwarze  719: /* --- roff parser state data management ---------------------------------- */
                    720:
1.67      kristaps  721: static void
                    722: roff_free1(struct roff *r)
                    723: {
1.176     schwarze  724:        struct tbl_node *tbl;
1.125     kristaps  725:        struct eqn_node *e;
1.167     kristaps  726:        int              i;
1.67      kristaps  727:
1.176     schwarze  728:        while (NULL != (tbl = r->first_tbl)) {
                    729:                r->first_tbl = tbl->next;
                    730:                tbl_free(tbl);
1.109     kristaps  731:        }
1.113     kristaps  732:        r->first_tbl = r->last_tbl = r->tbl = NULL;
                    733:
1.125     kristaps  734:        while (NULL != (e = r->first_eqn)) {
                    735:                r->first_eqn = e->next;
                    736:                eqn_free(e);
                    737:        }
                    738:        r->first_eqn = r->last_eqn = r->eqn = NULL;
                    739:
1.67      kristaps  740:        while (r->last)
                    741:                roffnode_pop(r);
1.109     kristaps  742:
1.223     schwarze  743:        free (r->rstack);
                    744:        r->rstack = NULL;
                    745:        r->rstacksz = 0;
                    746:        r->rstackpos = -1;
                    747:
                    748:        roff_freereg(r->regtab);
                    749:        r->regtab = NULL;
                    750:
1.167     kristaps  751:        roff_freestr(r->strtab);
1.306     schwarze  752:        roff_freestr(r->rentab);
1.167     kristaps  753:        roff_freestr(r->xmbtab);
1.306     schwarze  754:        r->strtab = r->rentab = r->xmbtab = NULL;
1.167     kristaps  755:
                    756:        if (r->xtab)
                    757:                for (i = 0; i < 128; i++)
                    758:                        free(r->xtab[i].p);
                    759:        free(r->xtab);
                    760:        r->xtab = NULL;
1.67      kristaps  761: }
                    762:
                    763: void
                    764: roff_reset(struct roff *r)
                    765: {
                    766:        roff_free1(r);
1.227     schwarze  767:        r->format = r->options & (MPARSE_MDOC | MPARSE_MAN);
1.303     schwarze  768:        r->control = '\0';
                    769:        r->escape = '\\';
1.307     schwarze  770:        roffce_lines = 0;
                    771:        roffce_node = NULL;
                    772:        roffit_lines = 0;
                    773:        roffit_macro = NULL;
1.67      kristaps  774: }
                    775:
                    776: void
                    777: roff_free(struct roff *r)
                    778: {
                    779:        roff_free1(r);
1.295     schwarze  780:        roffhash_free(r->reqtab);
1.67      kristaps  781:        free(r);
                    782: }
                    783:
                    784: struct roff *
1.279     schwarze  785: roff_alloc(struct mparse *parse, int options)
1.67      kristaps  786: {
                    787:        struct roff     *r;
                    788:
1.98      schwarze  789:        r = mandoc_calloc(1, sizeof(struct roff));
1.128     kristaps  790:        r->parse = parse;
1.295     schwarze  791:        r->reqtab = roffhash_alloc(0, ROFF_USERDEF);
1.199     schwarze  792:        r->options = options;
1.227     schwarze  793:        r->format = options & (MPARSE_MDOC | MPARSE_MAN);
1.82      kristaps  794:        r->rstackpos = -1;
1.303     schwarze  795:        r->escape = '\\';
1.277     schwarze  796:        return r;
1.265     schwarze  797: }
                    798:
1.266     schwarze  799: /* --- syntax tree state data management ---------------------------------- */
                    800:
1.265     schwarze  801: static void
                    802: roff_man_free1(struct roff_man *man)
                    803: {
                    804:
1.266     schwarze  805:        if (man->first != NULL)
                    806:                roff_node_delete(man, man->first);
1.265     schwarze  807:        free(man->meta.msec);
                    808:        free(man->meta.vol);
                    809:        free(man->meta.os);
                    810:        free(man->meta.arch);
                    811:        free(man->meta.title);
                    812:        free(man->meta.name);
                    813:        free(man->meta.date);
                    814: }
                    815:
                    816: static void
                    817: roff_man_alloc1(struct roff_man *man)
                    818: {
                    819:
                    820:        memset(&man->meta, 0, sizeof(man->meta));
                    821:        man->first = mandoc_calloc(1, sizeof(*man->first));
                    822:        man->first->type = ROFFT_ROOT;
                    823:        man->last = man->first;
                    824:        man->last_es = NULL;
                    825:        man->flags = 0;
                    826:        man->macroset = MACROSET_NONE;
                    827:        man->lastsec = man->lastnamed = SEC_NONE;
                    828:        man->next = ROFF_NEXT_CHILD;
                    829: }
                    830:
                    831: void
                    832: roff_man_reset(struct roff_man *man)
                    833: {
                    834:
                    835:        roff_man_free1(man);
                    836:        roff_man_alloc1(man);
                    837: }
                    838:
                    839: void
                    840: roff_man_free(struct roff_man *man)
                    841: {
                    842:
                    843:        roff_man_free1(man);
                    844:        free(man);
                    845: }
                    846:
                    847: struct roff_man *
                    848: roff_man_alloc(struct roff *roff, struct mparse *parse,
                    849:        const char *defos, int quick)
                    850: {
                    851:        struct roff_man *man;
                    852:
                    853:        man = mandoc_calloc(1, sizeof(*man));
                    854:        man->parse = parse;
                    855:        man->roff = roff;
                    856:        man->defos = defos;
                    857:        man->quick = quick;
                    858:        roff_man_alloc1(man);
1.296     schwarze  859:        roff->man = man;
1.277     schwarze  860:        return man;
1.67      kristaps  861: }
                    862:
1.266     schwarze  863: /* --- syntax tree handling ----------------------------------------------- */
                    864:
                    865: struct roff_node *
                    866: roff_node_alloc(struct roff_man *man, int line, int pos,
                    867:        enum roff_type type, int tok)
                    868: {
                    869:        struct roff_node        *n;
                    870:
                    871:        n = mandoc_calloc(1, sizeof(*n));
                    872:        n->line = line;
                    873:        n->pos = pos;
                    874:        n->tok = tok;
                    875:        n->type = type;
                    876:        n->sec = man->lastsec;
                    877:
                    878:        if (man->flags & MDOC_SYNOPSIS)
1.285     schwarze  879:                n->flags |= NODE_SYNPRETTY;
1.266     schwarze  880:        else
1.285     schwarze  881:                n->flags &= ~NODE_SYNPRETTY;
1.266     schwarze  882:        if (man->flags & MDOC_NEWLINE)
1.285     schwarze  883:                n->flags |= NODE_LINE;
1.266     schwarze  884:        man->flags &= ~MDOC_NEWLINE;
                    885:
1.277     schwarze  886:        return n;
1.266     schwarze  887: }
                    888:
                    889: void
                    890: roff_node_append(struct roff_man *man, struct roff_node *n)
                    891: {
                    892:
                    893:        switch (man->next) {
                    894:        case ROFF_NEXT_SIBLING:
1.281     schwarze  895:                if (man->last->next != NULL) {
                    896:                        n->next = man->last->next;
                    897:                        man->last->next->prev = n;
                    898:                } else
                    899:                        man->last->parent->last = n;
1.266     schwarze  900:                man->last->next = n;
                    901:                n->prev = man->last;
                    902:                n->parent = man->last->parent;
                    903:                break;
                    904:        case ROFF_NEXT_CHILD:
1.287     schwarze  905:                if (man->last->child != NULL) {
                    906:                        n->next = man->last->child;
                    907:                        man->last->child->prev = n;
                    908:                } else
                    909:                        man->last->last = n;
1.266     schwarze  910:                man->last->child = n;
                    911:                n->parent = man->last;
                    912:                break;
                    913:        default:
                    914:                abort();
                    915:        }
1.282     schwarze  916:        man->last = n;
1.266     schwarze  917:
                    918:        switch (n->type) {
                    919:        case ROFFT_HEAD:
                    920:                n->parent->head = n;
                    921:                break;
                    922:        case ROFFT_BODY:
1.282     schwarze  923:                if (n->end != ENDBODY_NOT)
                    924:                        return;
1.266     schwarze  925:                n->parent->body = n;
                    926:                break;
                    927:        case ROFFT_TAIL:
                    928:                n->parent->tail = n;
                    929:                break;
                    930:        default:
1.282     schwarze  931:                return;
1.266     schwarze  932:        }
1.282     schwarze  933:
                    934:        /*
                    935:         * Copy over the normalised-data pointer of our parent.  Not
                    936:         * everybody has one, but copying a null pointer is fine.
                    937:         */
                    938:
                    939:        n->norm = n->parent->norm;
                    940:        assert(n->parent->type == ROFFT_BLOCK);
1.266     schwarze  941: }
                    942:
1.267     schwarze  943: void
                    944: roff_word_alloc(struct roff_man *man, int line, int pos, const char *word)
                    945: {
                    946:        struct roff_node        *n;
                    947:
                    948:        n = roff_node_alloc(man, line, pos, ROFFT_TEXT, TOKEN_NONE);
                    949:        n->string = roff_strdup(man->roff, word);
                    950:        roff_node_append(man, n);
1.286     schwarze  951:        n->flags |= NODE_VALID | NODE_ENDED;
1.267     schwarze  952:        man->next = ROFF_NEXT_SIBLING;
                    953: }
                    954:
                    955: void
                    956: roff_word_append(struct roff_man *man, const char *word)
                    957: {
                    958:        struct roff_node        *n;
                    959:        char                    *addstr, *newstr;
                    960:
                    961:        n = man->last;
                    962:        addstr = roff_strdup(man->roff, word);
                    963:        mandoc_asprintf(&newstr, "%s %s", n->string, addstr);
                    964:        free(addstr);
                    965:        free(n->string);
                    966:        n->string = newstr;
                    967:        man->next = ROFF_NEXT_SIBLING;
1.268     schwarze  968: }
                    969:
                    970: void
                    971: roff_elem_alloc(struct roff_man *man, int line, int pos, int tok)
                    972: {
                    973:        struct roff_node        *n;
                    974:
                    975:        n = roff_node_alloc(man, line, pos, ROFFT_ELEM, tok);
                    976:        roff_node_append(man, n);
                    977:        man->next = ROFF_NEXT_CHILD;
                    978: }
                    979:
                    980: struct roff_node *
                    981: roff_block_alloc(struct roff_man *man, int line, int pos, int tok)
                    982: {
                    983:        struct roff_node        *n;
                    984:
                    985:        n = roff_node_alloc(man, line, pos, ROFFT_BLOCK, tok);
                    986:        roff_node_append(man, n);
                    987:        man->next = ROFF_NEXT_CHILD;
1.277     schwarze  988:        return n;
1.267     schwarze  989: }
                    990:
1.266     schwarze  991: struct roff_node *
                    992: roff_head_alloc(struct roff_man *man, int line, int pos, int tok)
                    993: {
                    994:        struct roff_node        *n;
                    995:
                    996:        n = roff_node_alloc(man, line, pos, ROFFT_HEAD, tok);
                    997:        roff_node_append(man, n);
                    998:        man->next = ROFF_NEXT_CHILD;
1.277     schwarze  999:        return n;
1.266     schwarze 1000: }
                   1001:
                   1002: struct roff_node *
                   1003: roff_body_alloc(struct roff_man *man, int line, int pos, int tok)
                   1004: {
                   1005:        struct roff_node        *n;
                   1006:
                   1007:        n = roff_node_alloc(man, line, pos, ROFFT_BODY, tok);
                   1008:        roff_node_append(man, n);
                   1009:        man->next = ROFF_NEXT_CHILD;
1.277     schwarze 1010:        return n;
1.267     schwarze 1011: }
                   1012:
                   1013: void
                   1014: roff_addeqn(struct roff_man *man, const struct eqn *eqn)
                   1015: {
                   1016:        struct roff_node        *n;
                   1017:
                   1018:        n = roff_node_alloc(man, eqn->ln, eqn->pos, ROFFT_EQN, TOKEN_NONE);
                   1019:        n->eqn = eqn;
                   1020:        if (eqn->ln > man->last->line)
1.285     schwarze 1021:                n->flags |= NODE_LINE;
1.267     schwarze 1022:        roff_node_append(man, n);
                   1023:        man->next = ROFF_NEXT_SIBLING;
                   1024: }
                   1025:
                   1026: void
                   1027: roff_addtbl(struct roff_man *man, const struct tbl_span *tbl)
                   1028: {
                   1029:        struct roff_node        *n;
                   1030:
                   1031:        if (man->macroset == MACROSET_MAN)
1.302     schwarze 1032:                man_breakscope(man, ROFF_TS);
1.267     schwarze 1033:        n = roff_node_alloc(man, tbl->line, 0, ROFFT_TBL, TOKEN_NONE);
                   1034:        n->span = tbl;
                   1035:        roff_node_append(man, n);
1.286     schwarze 1036:        n->flags |= NODE_VALID | NODE_ENDED;
1.267     schwarze 1037:        man->next = ROFF_NEXT_SIBLING;
1.266     schwarze 1038: }
                   1039:
                   1040: void
                   1041: roff_node_unlink(struct roff_man *man, struct roff_node *n)
                   1042: {
                   1043:
                   1044:        /* Adjust siblings. */
                   1045:
                   1046:        if (n->prev)
                   1047:                n->prev->next = n->next;
                   1048:        if (n->next)
                   1049:                n->next->prev = n->prev;
                   1050:
                   1051:        /* Adjust parent. */
                   1052:
                   1053:        if (n->parent != NULL) {
                   1054:                if (n->parent->child == n)
                   1055:                        n->parent->child = n->next;
                   1056:                if (n->parent->last == n)
                   1057:                        n->parent->last = n->prev;
                   1058:        }
                   1059:
                   1060:        /* Adjust parse point. */
                   1061:
                   1062:        if (man == NULL)
                   1063:                return;
                   1064:        if (man->last == n) {
                   1065:                if (n->prev == NULL) {
                   1066:                        man->last = n->parent;
                   1067:                        man->next = ROFF_NEXT_CHILD;
                   1068:                } else {
                   1069:                        man->last = n->prev;
                   1070:                        man->next = ROFF_NEXT_SIBLING;
                   1071:                }
                   1072:        }
                   1073:        if (man->first == n)
                   1074:                man->first = NULL;
                   1075: }
                   1076:
                   1077: void
                   1078: roff_node_free(struct roff_node *n)
                   1079: {
                   1080:
                   1081:        if (n->args != NULL)
                   1082:                mdoc_argv_free(n->args);
                   1083:        if (n->type == ROFFT_BLOCK || n->type == ROFFT_ELEM)
                   1084:                free(n->norm);
                   1085:        free(n->string);
                   1086:        free(n);
                   1087: }
                   1088:
                   1089: void
                   1090: roff_node_delete(struct roff_man *man, struct roff_node *n)
                   1091: {
                   1092:
                   1093:        while (n->child != NULL)
                   1094:                roff_node_delete(man, n->child);
                   1095:        roff_node_unlink(man, n);
                   1096:        roff_node_free(n);
1.269     schwarze 1097: }
                   1098:
                   1099: void
                   1100: deroff(char **dest, const struct roff_node *n)
                   1101: {
                   1102:        char    *cp;
                   1103:        size_t   sz;
                   1104:
                   1105:        if (n->type != ROFFT_TEXT) {
                   1106:                for (n = n->child; n != NULL; n = n->next)
                   1107:                        deroff(dest, n);
                   1108:                return;
                   1109:        }
                   1110:
1.288     schwarze 1111:        /* Skip leading whitespace. */
1.269     schwarze 1112:
1.288     schwarze 1113:        for (cp = n->string; *cp != '\0'; cp++) {
1.289     schwarze 1114:                if (cp[0] == '\\' && cp[1] != '\0' &&
                   1115:                    strchr(" %&0^|~", cp[1]) != NULL)
1.269     schwarze 1116:                        cp++;
1.288     schwarze 1117:                else if ( ! isspace((unsigned char)*cp))
1.269     schwarze 1118:                        break;
                   1119:        }
                   1120:
1.289     schwarze 1121:        /* Skip trailing backslash. */
                   1122:
                   1123:        sz = strlen(cp);
1.290     schwarze 1124:        if (sz > 0 && cp[sz - 1] == '\\')
1.289     schwarze 1125:                sz--;
                   1126:
1.269     schwarze 1127:        /* Skip trailing whitespace. */
                   1128:
1.289     schwarze 1129:        for (; sz; sz--)
1.269     schwarze 1130:                if ( ! isspace((unsigned char)cp[sz-1]))
                   1131:                        break;
                   1132:
                   1133:        /* Skip empty strings. */
                   1134:
                   1135:        if (sz == 0)
                   1136:                return;
                   1137:
                   1138:        if (*dest == NULL) {
                   1139:                *dest = mandoc_strndup(cp, sz);
                   1140:                return;
                   1141:        }
                   1142:
                   1143:        mandoc_asprintf(&cp, "%s %*s", *dest, (int)sz, cp);
                   1144:        free(*dest);
                   1145:        *dest = cp;
1.266     schwarze 1146: }
                   1147:
                   1148: /* --- main functions of the roff parser ---------------------------------- */
                   1149:
1.94      kristaps 1150: /*
1.206     schwarze 1151:  * In the current line, expand escape sequences that tend to get
                   1152:  * used in numerical expressions and conditional requests.
                   1153:  * Also check the syntax of the remaining escape sequences.
1.154     kristaps 1154:  */
1.172     schwarze 1155: static enum rofferr
1.238     schwarze 1156: roff_res(struct roff *r, struct buf *buf, int ln, int pos)
1.94      kristaps 1157: {
1.208     schwarze 1158:        char             ubuf[24]; /* buffer to print the number */
1.205     schwarze 1159:        const char      *start; /* start of the string to process */
1.209     schwarze 1160:        char            *stesc; /* start of an escape sequence ('\\') */
1.108     schwarze 1161:        const char      *stnam; /* start of the name, after "[(*" */
                   1162:        const char      *cp;    /* end of the name, e.g. before ']' */
                   1163:        const char      *res;   /* the string to be substituted */
1.238     schwarze 1164:        char            *nbuf;  /* new buffer to copy buf->buf to */
1.181     schwarze 1165:        size_t           maxl;  /* expected length of the escape name */
                   1166:        size_t           naml;  /* actual length of the escape name */
1.237     schwarze 1167:        enum mandoc_esc  esc;   /* type of the escape sequence */
                   1168:        int              inaml; /* length returned from mandoc_escape() */
1.181     schwarze 1169:        int              expand_count;  /* to avoid infinite loops */
1.206     schwarze 1170:        int              npos;  /* position in numeric expression */
1.218     schwarze 1171:        int              arg_complete; /* argument not interrupted by eol */
1.303     schwarze 1172:        int              done;  /* no more input available */
1.206     schwarze 1173:        char             term;  /* character terminating the escape */
1.94      kristaps 1174:
1.303     schwarze 1175:        /* Search forward for comments. */
                   1176:
                   1177:        done = 0;
                   1178:        start = buf->buf + pos;
                   1179:        for (stesc = buf->buf + pos; *stesc != '\0'; stesc++) {
                   1180:                if (stesc[0] != r->escape || stesc[1] == '\0')
                   1181:                        continue;
                   1182:                stesc++;
                   1183:                if (*stesc != '"' && *stesc != '#')
                   1184:                        continue;
                   1185:                cp = strchr(stesc--, '\0') - 1;
                   1186:                if (*cp == '\n') {
                   1187:                        done = 1;
                   1188:                        cp--;
                   1189:                }
                   1190:                if (*cp == ' ' || *cp == '\t')
                   1191:                        mandoc_msg(MANDOCERR_SPACE_EOL, r->parse,
                   1192:                            ln, cp - buf->buf, NULL);
                   1193:                while (stesc > start && stesc[-1] == ' ')
                   1194:                        stesc--;
                   1195:                *stesc = '\0';
                   1196:                break;
                   1197:        }
                   1198:        if (stesc == start)
                   1199:                return ROFF_CONT;
                   1200:        stesc--;
                   1201:
                   1202:        /* Notice the end of the input. */
                   1203:
                   1204:        if (*stesc == '\n') {
                   1205:                *stesc-- = '\0';
                   1206:                done = 1;
                   1207:        }
                   1208:
1.170     schwarze 1209:        expand_count = 0;
1.303     schwarze 1210:        while (stesc >= start) {
1.170     schwarze 1211:
1.205     schwarze 1212:                /* Search backwards for the next backslash. */
                   1213:
1.303     schwarze 1214:                if (*stesc != r->escape) {
                   1215:                        if (*stesc == '\\') {
                   1216:                                *stesc = '\0';
                   1217:                                buf->sz = mandoc_asprintf(&nbuf, "%s\\e%s",
                   1218:                                    buf->buf, stesc + 1) + 1;
                   1219:                                start = nbuf + pos;
                   1220:                                stesc = nbuf + (stesc - buf->buf);
                   1221:                                free(buf->buf);
                   1222:                                buf->buf = nbuf;
                   1223:                        }
                   1224:                        stesc--;
1.205     schwarze 1225:                        continue;
1.303     schwarze 1226:                }
1.205     schwarze 1227:
                   1228:                /* If it is escaped, skip it. */
                   1229:
                   1230:                for (cp = stesc - 1; cp >= start; cp--)
1.303     schwarze 1231:                        if (*cp != r->escape)
1.205     schwarze 1232:                                break;
                   1233:
1.238     schwarze 1234:                if ((stesc - cp) % 2 == 0) {
1.303     schwarze 1235:                        while (stesc > cp)
                   1236:                                *stesc-- = '\\';
1.205     schwarze 1237:                        continue;
1.303     schwarze 1238:                } else if (stesc[1] != '\0') {
                   1239:                        *stesc = '\\';
                   1240:                } else {
                   1241:                        *stesc-- = '\0';
                   1242:                        if (done)
                   1243:                                continue;
                   1244:                        else
                   1245:                                return ROFF_APPEND;
1.205     schwarze 1246:                }
1.108     schwarze 1247:
1.206     schwarze 1248:                /* Decide whether to expand or to check only. */
1.108     schwarze 1249:
1.206     schwarze 1250:                term = '\0';
1.205     schwarze 1251:                cp = stesc + 1;
1.181     schwarze 1252:                switch (*cp) {
1.207     schwarze 1253:                case '*':
1.181     schwarze 1254:                        res = NULL;
                   1255:                        break;
1.207     schwarze 1256:                case 'B':
                   1257:                case 'w':
1.206     schwarze 1258:                        term = cp[1];
                   1259:                        /* FALLTHROUGH */
1.207     schwarze 1260:                case 'n':
1.181     schwarze 1261:                        res = ubuf;
                   1262:                        break;
                   1263:                default:
1.237     schwarze 1264:                        esc = mandoc_escape(&cp, &stnam, &inaml);
                   1265:                        if (esc == ESCAPE_ERROR ||
                   1266:                            (esc == ESCAPE_SPECIAL &&
1.279     schwarze 1267:                             mchars_spec2cp(stnam, inaml) < 0))
1.219     schwarze 1268:                                mandoc_vmsg(MANDOCERR_ESC_BAD,
1.238     schwarze 1269:                                    r->parse, ln, (int)(stesc - buf->buf),
1.219     schwarze 1270:                                    "%.*s", (int)(cp - stesc), stesc);
1.303     schwarze 1271:                        stesc--;
1.205     schwarze 1272:                        continue;
1.152     kristaps 1273:                }
                   1274:
1.205     schwarze 1275:                if (EXPAND_LIMIT < ++expand_count) {
                   1276:                        mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
1.238     schwarze 1277:                            ln, (int)(stesc - buf->buf), NULL);
1.277     schwarze 1278:                        return ROFF_IGN;
1.205     schwarze 1279:                }
1.108     schwarze 1280:
                   1281:                /*
                   1282:                 * The third character decides the length
1.181     schwarze 1283:                 * of the name of the string or register.
1.108     schwarze 1284:                 * Save a pointer to the name.
                   1285:                 */
                   1286:
1.238     schwarze 1287:                if (term == '\0') {
1.206     schwarze 1288:                        switch (*++cp) {
1.207     schwarze 1289:                        case '\0':
1.206     schwarze 1290:                                maxl = 0;
                   1291:                                break;
1.207     schwarze 1292:                        case '(':
1.206     schwarze 1293:                                cp++;
                   1294:                                maxl = 2;
                   1295:                                break;
1.207     schwarze 1296:                        case '[':
1.206     schwarze 1297:                                cp++;
                   1298:                                term = ']';
                   1299:                                maxl = 0;
                   1300:                                break;
                   1301:                        default:
                   1302:                                maxl = 1;
                   1303:                                break;
                   1304:                        }
                   1305:                } else {
                   1306:                        cp += 2;
1.94      kristaps 1307:                        maxl = 0;
                   1308:                }
1.108     schwarze 1309:                stnam = cp;
1.94      kristaps 1310:
1.108     schwarze 1311:                /* Advance to the end of the name. */
1.94      kristaps 1312:
1.253     schwarze 1313:                naml = 0;
1.218     schwarze 1314:                arg_complete = 1;
1.253     schwarze 1315:                while (maxl == 0 || naml < maxl) {
1.238     schwarze 1316:                        if (*cp == '\0') {
1.219     schwarze 1317:                                mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238     schwarze 1318:                                    ln, (int)(stesc - buf->buf), stesc);
1.218     schwarze 1319:                                arg_complete = 0;
1.206     schwarze 1320:                                break;
1.153     kristaps 1321:                        }
1.238     schwarze 1322:                        if (maxl == 0 && *cp == term) {
1.206     schwarze 1323:                                cp++;
1.253     schwarze 1324:                                break;
                   1325:                        }
                   1326:                        if (*cp++ != '\\' || stesc[1] != 'w') {
                   1327:                                naml++;
                   1328:                                continue;
                   1329:                        }
                   1330:                        switch (mandoc_escape(&cp, NULL, NULL)) {
                   1331:                        case ESCAPE_SPECIAL:
                   1332:                        case ESCAPE_UNICODE:
                   1333:                        case ESCAPE_NUMBERED:
                   1334:                        case ESCAPE_OVERSTRIKE:
                   1335:                                naml++;
                   1336:                                break;
                   1337:                        default:
1.94      kristaps 1338:                                break;
1.206     schwarze 1339:                        }
1.94      kristaps 1340:                }
                   1341:
1.108     schwarze 1342:                /*
                   1343:                 * Retrieve the replacement string; if it is
                   1344:                 * undefined, resume searching for escapes.
                   1345:                 */
                   1346:
1.206     schwarze 1347:                switch (stesc[1]) {
1.207     schwarze 1348:                case '*':
1.218     schwarze 1349:                        if (arg_complete)
                   1350:                                res = roff_getstrn(r, stnam, naml);
1.206     schwarze 1351:                        break;
1.207     schwarze 1352:                case 'B':
1.206     schwarze 1353:                        npos = 0;
1.218     schwarze 1354:                        ubuf[0] = arg_complete &&
1.261     schwarze 1355:                            roff_evalnum(r, ln, stnam, &npos,
                   1356:                              NULL, ROFFNUM_SCALE) &&
1.218     schwarze 1357:                            stnam + npos + 1 == cp ? '1' : '0';
1.206     schwarze 1358:                        ubuf[1] = '\0';
                   1359:                        break;
1.207     schwarze 1360:                case 'n':
1.218     schwarze 1361:                        if (arg_complete)
                   1362:                                (void)snprintf(ubuf, sizeof(ubuf), "%d",
                   1363:                                    roff_getregn(r, stnam, naml));
                   1364:                        else
                   1365:                                ubuf[0] = '\0';
1.206     schwarze 1366:                        break;
1.207     schwarze 1367:                case 'w':
1.218     schwarze 1368:                        /* use even incomplete args */
1.208     schwarze 1369:                        (void)snprintf(ubuf, sizeof(ubuf), "%d",
1.206     schwarze 1370:                            24 * (int)naml);
                   1371:                        break;
                   1372:                }
1.94      kristaps 1373:
1.238     schwarze 1374:                if (res == NULL) {
1.219     schwarze 1375:                        mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238     schwarze 1376:                            r->parse, ln, (int)(stesc - buf->buf),
1.219     schwarze 1377:                            "%.*s", (int)naml, stnam);
1.142     kristaps 1378:                        res = "";
1.246     schwarze 1379:                } else if (buf->sz + strlen(res) > SHRT_MAX) {
                   1380:                        mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
                   1381:                            ln, (int)(stesc - buf->buf), NULL);
1.277     schwarze 1382:                        return ROFF_IGN;
1.94      kristaps 1383:                }
                   1384:
1.108     schwarze 1385:                /* Replace the escape sequence by the string. */
                   1386:
1.209     schwarze 1387:                *stesc = '\0';
1.238     schwarze 1388:                buf->sz = mandoc_asprintf(&nbuf, "%s%s%s",
                   1389:                    buf->buf, res, cp) + 1;
1.94      kristaps 1390:
1.205     schwarze 1391:                /* Prepare for the next replacement. */
1.94      kristaps 1392:
1.205     schwarze 1393:                start = nbuf + pos;
1.238     schwarze 1394:                stesc = nbuf + (stesc - buf->buf) + strlen(res);
                   1395:                free(buf->buf);
                   1396:                buf->buf = nbuf;
1.154     kristaps 1397:        }
1.277     schwarze 1398:        return ROFF_CONT;
1.154     kristaps 1399: }
                   1400:
                   1401: /*
1.275     schwarze 1402:  * Process text streams.
1.154     kristaps 1403:  */
                   1404: static enum rofferr
1.305     schwarze 1405: roff_parsetext(struct roff *r, struct buf *buf, int pos, int *offs)
1.154     kristaps 1406: {
                   1407:        size_t           sz;
                   1408:        const char      *start;
1.178     schwarze 1409:        char            *p;
                   1410:        int              isz;
1.154     kristaps 1411:        enum mandoc_esc  esc;
                   1412:
1.275     schwarze 1413:        /* Spring the input line trap. */
                   1414:
                   1415:        if (roffit_lines == 1) {
                   1416:                isz = mandoc_asprintf(&p, "%s\n.%s", buf->buf, roffit_macro);
                   1417:                free(buf->buf);
                   1418:                buf->buf = p;
                   1419:                buf->sz = isz + 1;
                   1420:                *offs = 0;
                   1421:                free(roffit_macro);
                   1422:                roffit_lines = 0;
1.277     schwarze 1423:                return ROFF_REPARSE;
1.275     schwarze 1424:        } else if (roffit_lines > 1)
                   1425:                --roffit_lines;
                   1426:
1.305     schwarze 1427:        if (roffce_node != NULL && buf->buf[pos] != '\0') {
                   1428:                if (roffce_lines < 1) {
                   1429:                        r->man->last = roffce_node;
                   1430:                        r->man->next = ROFF_NEXT_SIBLING;
                   1431:                        roffce_lines = 0;
                   1432:                        roffce_node = NULL;
                   1433:                } else
                   1434:                        roffce_lines--;
                   1435:        }
                   1436:
1.275     schwarze 1437:        /* Convert all breakable hyphens into ASCII_HYPH. */
                   1438:
1.238     schwarze 1439:        start = p = buf->buf + pos;
1.154     kristaps 1440:
1.238     schwarze 1441:        while (*p != '\0') {
1.154     kristaps 1442:                sz = strcspn(p, "-\\");
                   1443:                p += sz;
                   1444:
1.238     schwarze 1445:                if (*p == '\0')
1.159     kristaps 1446:                        break;
                   1447:
1.238     schwarze 1448:                if (*p == '\\') {
1.154     kristaps 1449:                        /* Skip over escapes. */
                   1450:                        p++;
1.189     schwarze 1451:                        esc = mandoc_escape((const char **)&p, NULL, NULL);
1.238     schwarze 1452:                        if (esc == ESCAPE_ERROR)
1.154     kristaps 1453:                                break;
1.264     schwarze 1454:                        while (*p == '-')
                   1455:                                p++;
1.155     kristaps 1456:                        continue;
1.159     kristaps 1457:                } else if (p == start) {
1.158     kristaps 1458:                        p++;
1.155     kristaps 1459:                        continue;
1.158     kristaps 1460:                }
1.155     kristaps 1461:
1.171     schwarze 1462:                if (isalpha((unsigned char)p[-1]) &&
                   1463:                    isalpha((unsigned char)p[1]))
1.155     kristaps 1464:                        *p = ASCII_HYPH;
                   1465:                p++;
1.94      kristaps 1466:        }
1.277     schwarze 1467:        return ROFF_CONT;
1.94      kristaps 1468: }
                   1469:
1.67      kristaps 1470: enum rofferr
1.238     schwarze 1471: roff_parseln(struct roff *r, int ln, struct buf *buf, int *offs)
1.67      kristaps 1472: {
1.294     schwarze 1473:        enum roff_tok    t;
1.109     kristaps 1474:        enum rofferr     e;
1.238     schwarze 1475:        int              pos;   /* parse point */
1.243     schwarze 1476:        int              spos;  /* saved parse point for messages */
1.238     schwarze 1477:        int              ppos;  /* original offset in buf->buf */
                   1478:        int              ctl;   /* macro line (boolean) */
                   1479:
                   1480:        ppos = pos = *offs;
1.79      kristaps 1481:
1.230     schwarze 1482:        /* Handle in-line equation delimiters. */
                   1483:
1.236     schwarze 1484:        if (r->tbl == NULL &&
                   1485:            r->last_eqn != NULL && r->last_eqn->delim &&
1.230     schwarze 1486:            (r->eqn == NULL || r->eqn_inline)) {
1.238     schwarze 1487:                e = roff_eqndelim(r, buf, pos);
1.230     schwarze 1488:                if (e == ROFF_REPARSE)
1.277     schwarze 1489:                        return e;
1.230     schwarze 1490:                assert(e == ROFF_CONT);
                   1491:        }
                   1492:
                   1493:        /* Expand some escape sequences. */
1.94      kristaps 1494:
1.238     schwarze 1495:        e = roff_res(r, buf, ln, pos);
1.303     schwarze 1496:        if (e == ROFF_IGN || e == ROFF_APPEND)
1.277     schwarze 1497:                return e;
1.238     schwarze 1498:        assert(e == ROFF_CONT);
1.94      kristaps 1499:
1.238     schwarze 1500:        ctl = roff_getcontrol(r, buf->buf, &pos);
1.130     kristaps 1501:
1.94      kristaps 1502:        /*
1.79      kristaps 1503:         * First, if a scope is open and we're not a macro, pass the
1.252     schwarze 1504:         * text through the macro's filter.
                   1505:         * Equations process all content themselves.
                   1506:         * Tables process almost all content themselves, but we want
                   1507:         * to warn about macros before passing it there.
1.79      kristaps 1508:         */
1.74      kristaps 1509:
1.252     schwarze 1510:        if (r->last != NULL && ! ctl) {
1.78      kristaps 1511:                t = r->last->tok;
1.238     schwarze 1512:                e = (*roffs[t].text)(r, t, buf, ln, pos, pos, offs);
1.294     schwarze 1513:                if (e == ROFF_IGN)
1.277     schwarze 1514:                        return e;
1.294     schwarze 1515:                assert(e == ROFF_CONT);
1.182     schwarze 1516:        }
1.252     schwarze 1517:        if (r->eqn != NULL)
1.277     schwarze 1518:                return eqn_read(&r->eqn, ln, buf->buf, ppos, offs);
1.252     schwarze 1519:        if (r->tbl != NULL && ( ! ctl || buf->buf[pos] == '\0'))
1.277     schwarze 1520:                return tbl_read(r->tbl, ln, buf->buf, ppos);
1.252     schwarze 1521:        if ( ! ctl)
1.305     schwarze 1522:                return roff_parsetext(r, buf, pos, offs);
1.228     schwarze 1523:
                   1524:        /* Skip empty request lines. */
                   1525:
1.238     schwarze 1526:        if (buf->buf[pos] == '"') {
1.228     schwarze 1527:                mandoc_msg(MANDOCERR_COMMENT_BAD, r->parse,
                   1528:                    ln, pos, NULL);
1.277     schwarze 1529:                return ROFF_IGN;
1.238     schwarze 1530:        } else if (buf->buf[pos] == '\0')
1.277     schwarze 1531:                return ROFF_IGN;
1.67      kristaps 1532:
1.79      kristaps 1533:        /*
                   1534:         * If a scope is open, go to the child handler for that macro,
                   1535:         * as it may want to preprocess before doing anything with it.
1.125     kristaps 1536:         * Don't do so if an equation is open.
1.79      kristaps 1537:         */
1.78      kristaps 1538:
1.79      kristaps 1539:        if (r->last) {
                   1540:                t = r->last->tok;
1.277     schwarze 1541:                return (*roffs[t].sub)(r, t, buf, ln, ppos, pos, offs);
1.79      kristaps 1542:        }
1.78      kristaps 1543:
1.243     schwarze 1544:        /* No scope is open.  This is a new request or macro. */
                   1545:
                   1546:        spos = pos;
                   1547:        t = roff_parse(r, buf->buf, &pos, ln, ppos);
                   1548:
                   1549:        /* Tables ignore most macros. */
                   1550:
1.308     schwarze 1551:        if (r->tbl != NULL && (t == TOKEN_NONE || t == ROFF_TS ||
1.309   ! schwarze 1552:            t == ROFF_br || t == ROFF_ce || t == ROFF_rj || t == ROFF_sp)) {
1.243     schwarze 1553:                mandoc_msg(MANDOCERR_TBLMACRO, r->parse,
                   1554:                    ln, pos, buf->buf + spos);
1.308     schwarze 1555:                if (t != TOKEN_NONE)
1.277     schwarze 1556:                        return ROFF_IGN;
1.257     schwarze 1557:                while (buf->buf[pos] != '\0' && buf->buf[pos] != ' ')
                   1558:                        pos++;
1.291     schwarze 1559:                while (buf->buf[pos] == ' ')
1.257     schwarze 1560:                        pos++;
1.277     schwarze 1561:                return tbl_read(r->tbl, ln, buf->buf, pos);
1.243     schwarze 1562:        }
                   1563:
1.305     schwarze 1564:        /* For now, let high level macros abort .ce mode. */
                   1565:
                   1566:        if (ctl && roffce_node != NULL &&
                   1567:            (t == TOKEN_NONE || t == ROFF_EQ || t == ROFF_TS)) {
                   1568:                r->man->last = roffce_node;
                   1569:                r->man->next = ROFF_NEXT_SIBLING;
                   1570:                roffce_lines = 0;
                   1571:                roffce_node = NULL;
                   1572:        }
                   1573:
1.79      kristaps 1574:        /*
1.243     schwarze 1575:         * This is neither a roff request nor a user-defined macro.
                   1576:         * Let the standard macro set parsers handle it.
1.79      kristaps 1577:         */
1.67      kristaps 1578:
1.294     schwarze 1579:        if (t == TOKEN_NONE)
1.277     schwarze 1580:                return ROFF_CONT;
1.243     schwarze 1581:
                   1582:        /* Execute a roff request or a user defined macro. */
1.67      kristaps 1583:
1.296     schwarze 1584:        return (*roffs[t].proc)(r, t, buf, ln, spos, pos, offs);
1.74      kristaps 1585: }
                   1586:
1.117     kristaps 1587: void
1.74      kristaps 1588: roff_endparse(struct roff *r)
                   1589: {
                   1590:
1.110     kristaps 1591:        if (r->last)
1.221     schwarze 1592:                mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
                   1593:                    r->last->line, r->last->col,
1.295     schwarze 1594:                    roff_name[r->last->tok]);
1.117     kristaps 1595:
1.125     kristaps 1596:        if (r->eqn) {
1.221     schwarze 1597:                mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
                   1598:                    r->eqn->eqn.ln, r->eqn->eqn.pos, "EQ");
1.151     kristaps 1599:                eqn_end(&r->eqn);
1.125     kristaps 1600:        }
                   1601:
1.117     kristaps 1602:        if (r->tbl) {
1.221     schwarze 1603:                mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
                   1604:                    r->tbl->line, r->tbl->pos, "TS");
1.151     kristaps 1605:                tbl_end(&r->tbl);
1.117     kristaps 1606:        }
1.67      kristaps 1607: }
                   1608:
                   1609: /*
                   1610:  * Parse a roff node's type from the input buffer.  This must be in the
                   1611:  * form of ".foo xxx" in the usual way.
                   1612:  */
1.294     schwarze 1613: static enum roff_tok
1.214     schwarze 1614: roff_parse(struct roff *r, char *buf, int *pos, int ln, int ppos)
1.67      kristaps 1615: {
1.214     schwarze 1616:        char            *cp;
1.106     kristaps 1617:        const char      *mac;
                   1618:        size_t           maclen;
1.294     schwarze 1619:        enum roff_tok    t;
1.67      kristaps 1620:
1.214     schwarze 1621:        cp = buf + *pos;
                   1622:
                   1623:        if ('\0' == *cp || '"' == *cp || '\t' == *cp || ' ' == *cp)
1.294     schwarze 1624:                return TOKEN_NONE;
1.67      kristaps 1625:
1.214     schwarze 1626:        mac = cp;
                   1627:        maclen = roff_getname(r, &cp, ln, ppos);
1.67      kristaps 1628:
1.306     schwarze 1629:        t = (r->current_string = roff_getstrn(r, mac, maclen)) ?
                   1630:            ROFF_USERDEF :
                   1631:            (r->current_string = roff_getrenn(r, mac, maclen)) ?
                   1632:            ROFF_RENAMED : roffhash_find(r->reqtab, mac, maclen);
1.67      kristaps 1633:
1.294     schwarze 1634:        if (t != TOKEN_NONE)
1.214     schwarze 1635:                *pos = cp - buf;
1.67      kristaps 1636:
1.277     schwarze 1637:        return t;
1.67      kristaps 1638: }
                   1639:
1.266     schwarze 1640: /* --- handling of request blocks ----------------------------------------- */
                   1641:
1.67      kristaps 1642: static enum rofferr
1.76      kristaps 1643: roff_cblock(ROFF_ARGS)
1.67      kristaps 1644: {
                   1645:
1.79      kristaps 1646:        /*
                   1647:         * A block-close `..' should only be invoked as a child of an
                   1648:         * ignore macro, otherwise raise a warning and just ignore it.
                   1649:         */
                   1650:
1.238     schwarze 1651:        if (r->last == NULL) {
1.221     schwarze 1652:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1653:                    ln, ppos, "..");
1.277     schwarze 1654:                return ROFF_IGN;
1.76      kristaps 1655:        }
1.67      kristaps 1656:
1.81      kristaps 1657:        switch (r->last->tok) {
1.207     schwarze 1658:        case ROFF_am:
1.220     schwarze 1659:                /* ROFF_am1 is remapped to ROFF_am in roff_block(). */
1.207     schwarze 1660:        case ROFF_ami:
                   1661:        case ROFF_de:
1.108     schwarze 1662:                /* ROFF_de1 is remapped to ROFF_de in roff_block(). */
1.207     schwarze 1663:        case ROFF_dei:
                   1664:        case ROFF_ig:
1.81      kristaps 1665:                break;
                   1666:        default:
1.221     schwarze 1667:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1668:                    ln, ppos, "..");
1.277     schwarze 1669:                return ROFF_IGN;
1.76      kristaps 1670:        }
1.67      kristaps 1671:
1.238     schwarze 1672:        if (buf->buf[pos] != '\0')
1.217     schwarze 1673:                mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
1.238     schwarze 1674:                    ".. %s", buf->buf + pos);
1.71      kristaps 1675:
                   1676:        roffnode_pop(r);
1.76      kristaps 1677:        roffnode_cleanscope(r);
1.277     schwarze 1678:        return ROFF_IGN;
1.71      kristaps 1679:
1.67      kristaps 1680: }
                   1681:
1.76      kristaps 1682: static void
                   1683: roffnode_cleanscope(struct roff *r)
1.67      kristaps 1684: {
                   1685:
1.76      kristaps 1686:        while (r->last) {
1.173     schwarze 1687:                if (--r->last->endspan != 0)
1.76      kristaps 1688:                        break;
                   1689:                roffnode_pop(r);
                   1690:        }
1.67      kristaps 1691: }
                   1692:
1.195     schwarze 1693: static void
                   1694: roff_ccond(struct roff *r, int ln, int ppos)
1.74      kristaps 1695: {
                   1696:
1.76      kristaps 1697:        if (NULL == r->last) {
1.221     schwarze 1698:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1699:                    ln, ppos, "\\}");
1.195     schwarze 1700:                return;
1.76      kristaps 1701:        }
                   1702:
1.82      kristaps 1703:        switch (r->last->tok) {
1.207     schwarze 1704:        case ROFF_el:
                   1705:        case ROFF_ie:
                   1706:        case ROFF_if:
1.82      kristaps 1707:                break;
                   1708:        default:
1.221     schwarze 1709:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1710:                    ln, ppos, "\\}");
1.195     schwarze 1711:                return;
1.75      kristaps 1712:        }
                   1713:
1.76      kristaps 1714:        if (r->last->endspan > -1) {
1.221     schwarze 1715:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1716:                    ln, ppos, "\\}");
1.195     schwarze 1717:                return;
1.76      kristaps 1718:        }
                   1719:
1.75      kristaps 1720:        roffnode_pop(r);
1.76      kristaps 1721:        roffnode_cleanscope(r);
1.195     schwarze 1722:        return;
1.76      kristaps 1723: }
                   1724:
                   1725: static enum rofferr
1.80      kristaps 1726: roff_block(ROFF_ARGS)
1.76      kristaps 1727: {
1.220     schwarze 1728:        const char      *name;
                   1729:        char            *iname, *cp;
1.213     schwarze 1730:        size_t           namesz;
1.106     kristaps 1731:
1.220     schwarze 1732:        /* Ignore groff compatibility mode for now. */
1.76      kristaps 1733:
1.238     schwarze 1734:        if (tok == ROFF_de1)
1.220     schwarze 1735:                tok = ROFF_de;
1.251     schwarze 1736:        else if (tok == ROFF_dei1)
                   1737:                tok = ROFF_dei;
1.238     schwarze 1738:        else if (tok == ROFF_am1)
1.220     schwarze 1739:                tok = ROFF_am;
1.251     schwarze 1740:        else if (tok == ROFF_ami1)
                   1741:                tok = ROFF_ami;
1.220     schwarze 1742:
                   1743:        /* Parse the macro name argument. */
                   1744:
1.238     schwarze 1745:        cp = buf->buf + pos;
                   1746:        if (tok == ROFF_ig) {
1.220     schwarze 1747:                iname = NULL;
                   1748:                namesz = 0;
                   1749:        } else {
                   1750:                iname = cp;
                   1751:                namesz = roff_getname(r, &cp, ln, ppos);
                   1752:                iname[namesz] = '\0';
                   1753:        }
1.107     kristaps 1754:
1.220     schwarze 1755:        /* Resolve the macro name argument if it is indirect. */
1.107     kristaps 1756:
1.238     schwarze 1757:        if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
                   1758:                if ((name = roff_getstrn(r, iname, namesz)) == NULL) {
1.220     schwarze 1759:                        mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238     schwarze 1760:                            r->parse, ln, (int)(iname - buf->buf),
1.220     schwarze 1761:                            "%.*s", (int)namesz, iname);
                   1762:                        namesz = 0;
                   1763:                } else
                   1764:                        namesz = strlen(name);
                   1765:        } else
                   1766:                name = iname;
1.107     kristaps 1767:
1.238     schwarze 1768:        if (namesz == 0 && tok != ROFF_ig) {
1.220     schwarze 1769:                mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse,
1.295     schwarze 1770:                    ln, ppos, roff_name[tok]);
1.277     schwarze 1771:                return ROFF_IGN;
1.220     schwarze 1772:        }
1.80      kristaps 1773:
1.106     kristaps 1774:        roffnode_push(r, tok, name, ln, ppos);
                   1775:
                   1776:        /*
                   1777:         * At the beginning of a `de' macro, clear the existing string
                   1778:         * with the same name, if there is one.  New content will be
1.193     schwarze 1779:         * appended from roff_block_text() in multiline mode.
1.106     kristaps 1780:         */
1.107     kristaps 1781:
1.238     schwarze 1782:        if (tok == ROFF_de || tok == ROFF_dei)
1.213     schwarze 1783:                roff_setstrn(&r->strtab, name, namesz, "", 0, 0);
1.76      kristaps 1784:
1.238     schwarze 1785:        if (*cp == '\0')
1.277     schwarze 1786:                return ROFF_IGN;
1.78      kristaps 1787:
1.220     schwarze 1788:        /* Get the custom end marker. */
1.107     kristaps 1789:
1.220     schwarze 1790:        iname = cp;
1.213     schwarze 1791:        namesz = roff_getname(r, &cp, ln, ppos);
1.220     schwarze 1792:
                   1793:        /* Resolve the end marker if it is indirect. */
                   1794:
1.238     schwarze 1795:        if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
                   1796:                if ((name = roff_getstrn(r, iname, namesz)) == NULL) {
1.220     schwarze 1797:                        mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238     schwarze 1798:                            r->parse, ln, (int)(iname - buf->buf),
1.220     schwarze 1799:                            "%.*s", (int)namesz, iname);
                   1800:                        namesz = 0;
                   1801:                } else
                   1802:                        namesz = strlen(name);
                   1803:        } else
                   1804:                name = iname;
                   1805:
1.213     schwarze 1806:        if (namesz)
                   1807:                r->last->end = mandoc_strndup(name, namesz);
1.78      kristaps 1808:
1.238     schwarze 1809:        if (*cp != '\0')
1.217     schwarze 1810:                mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
1.295     schwarze 1811:                    ln, pos, ".%s ... %s", roff_name[tok], cp);
1.74      kristaps 1812:
1.277     schwarze 1813:        return ROFF_IGN;
1.78      kristaps 1814: }
                   1815:
                   1816: static enum rofferr
1.80      kristaps 1817: roff_block_sub(ROFF_ARGS)
1.79      kristaps 1818: {
1.294     schwarze 1819:        enum roff_tok   t;
1.79      kristaps 1820:        int             i, j;
                   1821:
                   1822:        /*
                   1823:         * First check whether a custom macro exists at this level.  If
                   1824:         * it does, then check against it.  This is some of groff's
                   1825:         * stranger behaviours.  If we encountered a custom end-scope
                   1826:         * tag and that tag also happens to be a "real" macro, then we
                   1827:         * need to try interpreting it again as a real macro.  If it's
                   1828:         * not, then return ignore.  Else continue.
                   1829:         */
                   1830:
                   1831:        if (r->last->end) {
1.130     kristaps 1832:                for (i = pos, j = 0; r->last->end[j]; j++, i++)
1.238     schwarze 1833:                        if (buf->buf[i] != r->last->end[j])
1.79      kristaps 1834:                                break;
                   1835:
1.238     schwarze 1836:                if (r->last->end[j] == '\0' &&
                   1837:                    (buf->buf[i] == '\0' ||
                   1838:                     buf->buf[i] == ' ' ||
                   1839:                     buf->buf[i] == '\t')) {
1.79      kristaps 1840:                        roffnode_pop(r);
                   1841:                        roffnode_cleanscope(r);
                   1842:
1.238     schwarze 1843:                        while (buf->buf[i] == ' ' || buf->buf[i] == '\t')
1.130     kristaps 1844:                                i++;
                   1845:
                   1846:                        pos = i;
1.238     schwarze 1847:                        if (roff_parse(r, buf->buf, &pos, ln, ppos) !=
1.294     schwarze 1848:                            TOKEN_NONE)
1.277     schwarze 1849:                                return ROFF_RERUN;
                   1850:                        return ROFF_IGN;
1.79      kristaps 1851:                }
                   1852:        }
                   1853:
                   1854:        /*
                   1855:         * If we have no custom end-query or lookup failed, then try
                   1856:         * pulling it out of the hashtable.
                   1857:         */
                   1858:
1.238     schwarze 1859:        t = roff_parse(r, buf->buf, &pos, ln, ppos);
1.79      kristaps 1860:
1.238     schwarze 1861:        if (t != ROFF_cblock) {
                   1862:                if (tok != ROFF_ig)
                   1863:                        roff_setstr(r, r->last->name, buf->buf + ppos, 2);
1.277     schwarze 1864:                return ROFF_IGN;
1.106     kristaps 1865:        }
1.79      kristaps 1866:
1.277     schwarze 1867:        return (*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs);
1.79      kristaps 1868: }
                   1869:
                   1870: static enum rofferr
1.80      kristaps 1871: roff_block_text(ROFF_ARGS)
1.78      kristaps 1872: {
                   1873:
1.238     schwarze 1874:        if (tok != ROFF_ig)
                   1875:                roff_setstr(r, r->last->name, buf->buf + pos, 2);
1.106     kristaps 1876:
1.277     schwarze 1877:        return ROFF_IGN;
1.78      kristaps 1878: }
                   1879:
                   1880: static enum rofferr
1.82      kristaps 1881: roff_cond_sub(ROFF_ARGS)
                   1882: {
1.294     schwarze 1883:        enum roff_tok    t;
1.139     kristaps 1884:        char            *ep;
1.198     schwarze 1885:        int              rr;
1.82      kristaps 1886:
                   1887:        rr = r->last->rule;
1.139     kristaps 1888:        roffnode_cleanscope(r);
1.238     schwarze 1889:        t = roff_parse(r, buf->buf, &pos, ln, ppos);
1.82      kristaps 1890:
1.139     kristaps 1891:        /*
1.177     schwarze 1892:         * Fully handle known macros when they are structurally
                   1893:         * required or when the conditional evaluated to true.
1.87      kristaps 1894:         */
                   1895:
1.294     schwarze 1896:        if (t != TOKEN_NONE && (rr || roffs[t].flags & ROFFMAC_STRUCT))
1.277     schwarze 1897:                return (*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs);
1.144     kristaps 1898:
1.196     schwarze 1899:        /*
                   1900:         * If `\}' occurs on a macro line without a preceding macro,
                   1901:         * drop the line completely.
                   1902:         */
                   1903:
1.238     schwarze 1904:        ep = buf->buf + pos;
                   1905:        if (ep[0] == '\\' && ep[1] == '}')
1.198     schwarze 1906:                rr = 0;
1.196     schwarze 1907:
1.177     schwarze 1908:        /* Always check for the closing delimiter `\}'. */
1.144     kristaps 1909:
1.238     schwarze 1910:        while ((ep = strchr(ep, '\\')) != NULL) {
                   1911:                if (*(++ep) == '}') {
1.197     schwarze 1912:                        *ep = '&';
1.238     schwarze 1913:                        roff_ccond(r, ln, ep - buf->buf - 1);
1.197     schwarze 1914:                }
1.247     schwarze 1915:                if (*ep != '\0')
                   1916:                        ++ep;
1.177     schwarze 1917:        }
1.277     schwarze 1918:        return rr ? ROFF_CONT : ROFF_IGN;
1.82      kristaps 1919: }
                   1920:
                   1921: static enum rofferr
                   1922: roff_cond_text(ROFF_ARGS)
1.78      kristaps 1923: {
1.140     kristaps 1924:        char            *ep;
1.198     schwarze 1925:        int              rr;
1.82      kristaps 1926:
                   1927:        rr = r->last->rule;
1.140     kristaps 1928:        roffnode_cleanscope(r);
1.82      kristaps 1929:
1.238     schwarze 1930:        ep = buf->buf + pos;
                   1931:        while ((ep = strchr(ep, '\\')) != NULL) {
                   1932:                if (*(++ep) == '}') {
1.197     schwarze 1933:                        *ep = '&';
1.238     schwarze 1934:                        roff_ccond(r, ln, ep - buf->buf - 1);
1.197     schwarze 1935:                }
1.247     schwarze 1936:                if (*ep != '\0')
                   1937:                        ++ep;
1.78      kristaps 1938:        }
1.277     schwarze 1939:        return rr ? ROFF_CONT : ROFF_IGN;
1.74      kristaps 1940: }
                   1941:
1.266     schwarze 1942: /* --- handling of numeric and conditional expressions -------------------- */
                   1943:
1.204     schwarze 1944: /*
                   1945:  * Parse a single signed integer number.  Stop at the first non-digit.
                   1946:  * If there is at least one digit, return success and advance the
                   1947:  * parse point, else return failure and let the parse point unchanged.
                   1948:  * Ignore overflows, treat them just like the C language.
                   1949:  */
1.184     schwarze 1950: static int
1.261     schwarze 1951: roff_getnum(const char *v, int *pos, int *res, int flags)
1.184     schwarze 1952: {
1.261     schwarze 1953:        int      myres, scaled, n, p;
1.206     schwarze 1954:
                   1955:        if (NULL == res)
                   1956:                res = &myres;
1.184     schwarze 1957:
                   1958:        p = *pos;
                   1959:        n = v[p] == '-';
1.261     schwarze 1960:        if (n || v[p] == '+')
1.184     schwarze 1961:                p++;
                   1962:
1.261     schwarze 1963:        if (flags & ROFFNUM_WHITE)
                   1964:                while (isspace((unsigned char)v[p]))
                   1965:                        p++;
                   1966:
1.184     schwarze 1967:        for (*res = 0; isdigit((unsigned char)v[p]); p++)
1.204     schwarze 1968:                *res = 10 * *res + v[p] - '0';
1.184     schwarze 1969:        if (p == *pos + n)
                   1970:                return 0;
                   1971:
                   1972:        if (n)
                   1973:                *res = -*res;
                   1974:
1.254     schwarze 1975:        /* Each number may be followed by one optional scaling unit. */
                   1976:
                   1977:        switch (v[p]) {
                   1978:        case 'f':
1.261     schwarze 1979:                scaled = *res * 65536;
1.254     schwarze 1980:                break;
                   1981:        case 'i':
1.261     schwarze 1982:                scaled = *res * 240;
1.254     schwarze 1983:                break;
                   1984:        case 'c':
1.261     schwarze 1985:                scaled = *res * 240 / 2.54;
1.254     schwarze 1986:                break;
                   1987:        case 'v':
                   1988:        case 'P':
1.261     schwarze 1989:                scaled = *res * 40;
1.254     schwarze 1990:                break;
                   1991:        case 'm':
                   1992:        case 'n':
1.261     schwarze 1993:                scaled = *res * 24;
1.254     schwarze 1994:                break;
                   1995:        case 'p':
1.261     schwarze 1996:                scaled = *res * 10 / 3;
1.254     schwarze 1997:                break;
                   1998:        case 'u':
1.261     schwarze 1999:                scaled = *res;
1.254     schwarze 2000:                break;
                   2001:        case 'M':
1.261     schwarze 2002:                scaled = *res * 6 / 25;
1.254     schwarze 2003:                break;
                   2004:        default:
1.261     schwarze 2005:                scaled = *res;
1.254     schwarze 2006:                p--;
                   2007:                break;
                   2008:        }
1.261     schwarze 2009:        if (flags & ROFFNUM_SCALE)
                   2010:                *res = scaled;
1.254     schwarze 2011:
                   2012:        *pos = p + 1;
1.277     schwarze 2013:        return 1;
1.184     schwarze 2014: }
                   2015:
1.198     schwarze 2016: /*
                   2017:  * Evaluate a string comparison condition.
                   2018:  * The first character is the delimiter.
                   2019:  * Succeed if the string up to its second occurrence
                   2020:  * matches the string up to its third occurence.
                   2021:  * Advance the cursor after the third occurrence
                   2022:  * or lacking that, to the end of the line.
                   2023:  */
                   2024: static int
                   2025: roff_evalstrcond(const char *v, int *pos)
                   2026: {
                   2027:        const char      *s1, *s2, *s3;
                   2028:        int              match;
                   2029:
                   2030:        match = 0;
                   2031:        s1 = v + *pos;          /* initial delimiter */
                   2032:        s2 = s1 + 1;            /* for scanning the first string */
                   2033:        s3 = strchr(s2, *s1);   /* for scanning the second string */
                   2034:
                   2035:        if (NULL == s3)         /* found no middle delimiter */
                   2036:                goto out;
                   2037:
                   2038:        while ('\0' != *++s3) {
                   2039:                if (*s2 != *s3) {  /* mismatch */
                   2040:                        s3 = strchr(s3, *s1);
                   2041:                        break;
                   2042:                }
                   2043:                if (*s3 == *s1) {  /* found the final delimiter */
                   2044:                        match = 1;
                   2045:                        break;
                   2046:                }
                   2047:                s2++;
                   2048:        }
                   2049:
                   2050: out:
                   2051:        if (NULL == s3)
                   2052:                s3 = strchr(s2, '\0');
1.242     schwarze 2053:        else if (*s3 != '\0')
1.198     schwarze 2054:                s3++;
                   2055:        *pos = s3 - v;
1.277     schwarze 2056:        return match;
1.198     schwarze 2057: }
                   2058:
1.204     schwarze 2059: /*
                   2060:  * Evaluate an optionally negated single character, numerical,
                   2061:  * or string condition.
                   2062:  */
1.198     schwarze 2063: static int
1.271     schwarze 2064: roff_evalcond(struct roff *r, int ln, char *v, int *pos)
1.88      kristaps 2065: {
1.271     schwarze 2066:        char    *cp, *name;
                   2067:        size_t   sz;
1.241     schwarze 2068:        int      number, savepos, wanttrue;
1.88      kristaps 2069:
1.198     schwarze 2070:        if ('!' == v[*pos]) {
                   2071:                wanttrue = 0;
                   2072:                (*pos)++;
                   2073:        } else
                   2074:                wanttrue = 1;
                   2075:
1.88      kristaps 2076:        switch (v[*pos]) {
1.240     schwarze 2077:        case '\0':
1.277     schwarze 2078:                return 0;
1.207     schwarze 2079:        case 'n':
                   2080:        case 'o':
1.88      kristaps 2081:                (*pos)++;
1.277     schwarze 2082:                return wanttrue;
1.207     schwarze 2083:        case 'c':
                   2084:        case 'd':
                   2085:        case 'e':
                   2086:        case 't':
1.239     schwarze 2087:        case 'v':
1.88      kristaps 2088:                (*pos)++;
1.277     schwarze 2089:                return !wanttrue;
1.271     schwarze 2090:        case 'r':
                   2091:                cp = name = v + ++*pos;
                   2092:                sz = roff_getname(r, &cp, ln, *pos);
                   2093:                *pos = cp - v;
1.277     schwarze 2094:                return (sz && roff_hasregn(r, name, sz)) == wanttrue;
1.88      kristaps 2095:        default:
                   2096:                break;
                   2097:        }
                   2098:
1.241     schwarze 2099:        savepos = *pos;
1.261     schwarze 2100:        if (roff_evalnum(r, ln, v, pos, &number, ROFFNUM_SCALE))
1.277     schwarze 2101:                return (number > 0) == wanttrue;
1.241     schwarze 2102:        else if (*pos == savepos)
1.277     schwarze 2103:                return roff_evalstrcond(v, pos) == wanttrue;
1.204     schwarze 2104:        else
1.277     schwarze 2105:                return 0;
1.88      kristaps 2106: }
                   2107:
1.74      kristaps 2108: static enum rofferr
1.103     kristaps 2109: roff_line_ignore(ROFF_ARGS)
1.89      kristaps 2110: {
1.123     schwarze 2111:
1.277     schwarze 2112:        return ROFF_IGN;
1.89      kristaps 2113: }
                   2114:
1.104     kristaps 2115: static enum rofferr
1.251     schwarze 2116: roff_insec(ROFF_ARGS)
                   2117: {
                   2118:
                   2119:        mandoc_msg(MANDOCERR_REQ_INSEC, r->parse,
1.295     schwarze 2120:            ln, ppos, roff_name[tok]);
1.277     schwarze 2121:        return ROFF_IGN;
1.251     schwarze 2122: }
                   2123:
                   2124: static enum rofferr
                   2125: roff_unsupp(ROFF_ARGS)
                   2126: {
                   2127:
                   2128:        mandoc_msg(MANDOCERR_REQ_UNSUPP, r->parse,
1.295     schwarze 2129:            ln, ppos, roff_name[tok]);
1.277     schwarze 2130:        return ROFF_IGN;
1.251     schwarze 2131: }
                   2132:
                   2133: static enum rofferr
1.82      kristaps 2134: roff_cond(ROFF_ARGS)
1.74      kristaps 2135: {
1.173     schwarze 2136:
                   2137:        roffnode_push(r, tok, NULL, ln, ppos);
1.74      kristaps 2138:
1.207     schwarze 2139:        /*
1.134     kristaps 2140:         * An `.el' has no conditional body: it will consume the value
                   2141:         * of the current rstack entry set in prior `ie' calls or
1.207     schwarze 2142:         * defaults to DENY.
1.134     kristaps 2143:         *
                   2144:         * If we're not an `el', however, then evaluate the conditional.
                   2145:         */
1.133     kristaps 2146:
1.238     schwarze 2147:        r->last->rule = tok == ROFF_el ?
1.207     schwarze 2148:            (r->rstackpos < 0 ? 0 : r->rstack[r->rstackpos--]) :
1.238     schwarze 2149:            roff_evalcond(r, ln, buf->buf, &pos);
1.77      kristaps 2150:
1.134     kristaps 2151:        /*
                   2152:         * An if-else will put the NEGATION of the current evaluated
                   2153:         * conditional into the stack of rules.
                   2154:         */
                   2155:
1.238     schwarze 2156:        if (tok == ROFF_ie) {
1.223     schwarze 2157:                if (r->rstackpos + 1 == r->rstacksz) {
                   2158:                        r->rstacksz += 16;
                   2159:                        r->rstack = mandoc_reallocarray(r->rstack,
                   2160:                            r->rstacksz, sizeof(int));
1.134     kristaps 2161:                }
1.198     schwarze 2162:                r->rstack[++r->rstackpos] = !r->last->rule;
1.82      kristaps 2163:        }
1.88      kristaps 2164:
                   2165:        /* If the parent has false as its rule, then so do we. */
                   2166:
1.198     schwarze 2167:        if (r->last->parent && !r->last->parent->rule)
                   2168:                r->last->rule = 0;
1.88      kristaps 2169:
                   2170:        /*
1.173     schwarze 2171:         * Determine scope.
                   2172:         * If there is nothing on the line after the conditional,
                   2173:         * not even whitespace, use next-line scope.
1.88      kristaps 2174:         */
1.74      kristaps 2175:
1.238     schwarze 2176:        if (buf->buf[pos] == '\0') {
1.173     schwarze 2177:                r->last->endspan = 2;
                   2178:                goto out;
                   2179:        }
                   2180:
1.238     schwarze 2181:        while (buf->buf[pos] == ' ')
1.173     schwarze 2182:                pos++;
                   2183:
                   2184:        /* An opening brace requests multiline scope. */
1.75      kristaps 2185:
1.238     schwarze 2186:        if (buf->buf[pos] == '\\' && buf->buf[pos + 1] == '{') {
1.75      kristaps 2187:                r->last->endspan = -1;
                   2188:                pos += 2;
1.272     schwarze 2189:                while (buf->buf[pos] == ' ')
                   2190:                        pos++;
1.173     schwarze 2191:                goto out;
1.207     schwarze 2192:        }
1.74      kristaps 2193:
1.77      kristaps 2194:        /*
1.173     schwarze 2195:         * Anything else following the conditional causes
                   2196:         * single-line scope.  Warn if the scope contains
                   2197:         * nothing but trailing whitespace.
1.77      kristaps 2198:         */
                   2199:
1.238     schwarze 2200:        if (buf->buf[pos] == '\0')
1.216     schwarze 2201:                mandoc_msg(MANDOCERR_COND_EMPTY, r->parse,
1.295     schwarze 2202:                    ln, ppos, roff_name[tok]);
1.77      kristaps 2203:
1.173     schwarze 2204:        r->last->endspan = 1;
1.74      kristaps 2205:
1.173     schwarze 2206: out:
1.75      kristaps 2207:        *offs = pos;
1.277     schwarze 2208:        return ROFF_RERUN;
1.83      schwarze 2209: }
                   2210:
                   2211: static enum rofferr
1.92      schwarze 2212: roff_ds(ROFF_ARGS)
                   2213: {
1.212     schwarze 2214:        char            *string;
                   2215:        const char      *name;
                   2216:        size_t           namesz;
1.96      kristaps 2217:
1.251     schwarze 2218:        /* Ignore groff compatibility mode for now. */
                   2219:
                   2220:        if (tok == ROFF_ds1)
                   2221:                tok = ROFF_ds;
                   2222:        else if (tok == ROFF_as1)
                   2223:                tok = ROFF_as;
                   2224:
1.96      kristaps 2225:        /*
1.212     schwarze 2226:         * The first word is the name of the string.
                   2227:         * If it is empty or terminated by an escape sequence,
                   2228:         * abort the `ds' request without defining anything.
1.96      kristaps 2229:         */
1.92      schwarze 2230:
1.238     schwarze 2231:        name = string = buf->buf + pos;
                   2232:        if (*name == '\0')
1.277     schwarze 2233:                return ROFF_IGN;
1.92      schwarze 2234:
1.212     schwarze 2235:        namesz = roff_getname(r, &string, ln, pos);
1.238     schwarze 2236:        if (name[namesz] == '\\')
1.277     schwarze 2237:                return ROFF_IGN;
1.212     schwarze 2238:
                   2239:        /* Read past the initial double-quote, if any. */
1.238     schwarze 2240:        if (*string == '"')
1.92      schwarze 2241:                string++;
                   2242:
1.96      kristaps 2243:        /* The rest is the value. */
1.212     schwarze 2244:        roff_setstrn(&r->strtab, name, namesz, string, strlen(string),
                   2245:            ROFF_as == tok);
1.277     schwarze 2246:        return ROFF_IGN;
1.92      schwarze 2247: }
                   2248:
1.204     schwarze 2249: /*
                   2250:  * Parse a single operator, one or two characters long.
                   2251:  * If the operator is recognized, return success and advance the
                   2252:  * parse point, else return failure and let the parse point unchanged.
                   2253:  */
                   2254: static int
                   2255: roff_getop(const char *v, int *pos, char *res)
                   2256: {
                   2257:
                   2258:        *res = v[*pos];
                   2259:
                   2260:        switch (*res) {
1.207     schwarze 2261:        case '+':
                   2262:        case '-':
                   2263:        case '*':
                   2264:        case '/':
                   2265:        case '%':
                   2266:        case '&':
                   2267:        case ':':
1.204     schwarze 2268:                break;
                   2269:        case '<':
                   2270:                switch (v[*pos + 1]) {
1.207     schwarze 2271:                case '=':
1.204     schwarze 2272:                        *res = 'l';
                   2273:                        (*pos)++;
                   2274:                        break;
1.207     schwarze 2275:                case '>':
1.204     schwarze 2276:                        *res = '!';
                   2277:                        (*pos)++;
                   2278:                        break;
1.207     schwarze 2279:                case '?':
1.204     schwarze 2280:                        *res = 'i';
                   2281:                        (*pos)++;
                   2282:                        break;
                   2283:                default:
                   2284:                        break;
                   2285:                }
                   2286:                break;
                   2287:        case '>':
                   2288:                switch (v[*pos + 1]) {
1.207     schwarze 2289:                case '=':
1.204     schwarze 2290:                        *res = 'g';
                   2291:                        (*pos)++;
                   2292:                        break;
1.207     schwarze 2293:                case '?':
1.204     schwarze 2294:                        *res = 'a';
                   2295:                        (*pos)++;
                   2296:                        break;
                   2297:                default:
                   2298:                        break;
                   2299:                }
                   2300:                break;
                   2301:        case '=':
                   2302:                if ('=' == v[*pos + 1])
                   2303:                        (*pos)++;
                   2304:                break;
                   2305:        default:
1.277     schwarze 2306:                return 0;
1.204     schwarze 2307:        }
                   2308:        (*pos)++;
                   2309:
1.277     schwarze 2310:        return *res;
1.204     schwarze 2311: }
                   2312:
                   2313: /*
                   2314:  * Evaluate either a parenthesized numeric expression
                   2315:  * or a single signed integer number.
                   2316:  */
                   2317: static int
1.235     schwarze 2318: roff_evalpar(struct roff *r, int ln,
1.261     schwarze 2319:        const char *v, int *pos, int *res, int flags)
1.204     schwarze 2320: {
                   2321:
                   2322:        if ('(' != v[*pos])
1.277     schwarze 2323:                return roff_getnum(v, pos, res, flags);
1.204     schwarze 2324:
                   2325:        (*pos)++;
1.261     schwarze 2326:        if ( ! roff_evalnum(r, ln, v, pos, res, flags | ROFFNUM_WHITE))
1.277     schwarze 2327:                return 0;
1.204     schwarze 2328:
1.206     schwarze 2329:        /*
                   2330:         * Omission of the closing parenthesis
                   2331:         * is an error in validation mode,
                   2332:         * but ignored in evaluation mode.
                   2333:         */
                   2334:
1.204     schwarze 2335:        if (')' == v[*pos])
                   2336:                (*pos)++;
1.206     schwarze 2337:        else if (NULL == res)
1.277     schwarze 2338:                return 0;
1.204     schwarze 2339:
1.277     schwarze 2340:        return 1;
1.204     schwarze 2341: }
                   2342:
                   2343: /*
                   2344:  * Evaluate a complete numeric expression.
                   2345:  * Proceed left to right, there is no concept of precedence.
                   2346:  */
                   2347: static int
1.235     schwarze 2348: roff_evalnum(struct roff *r, int ln, const char *v,
1.261     schwarze 2349:        int *pos, int *res, int flags)
1.204     schwarze 2350: {
                   2351:        int              mypos, operand2;
                   2352:        char             operator;
                   2353:
                   2354:        if (NULL == pos) {
                   2355:                mypos = 0;
                   2356:                pos = &mypos;
                   2357:        }
                   2358:
1.261     schwarze 2359:        if (flags & ROFFNUM_WHITE)
1.204     schwarze 2360:                while (isspace((unsigned char)v[*pos]))
                   2361:                        (*pos)++;
                   2362:
1.261     schwarze 2363:        if ( ! roff_evalpar(r, ln, v, pos, res, flags))
1.277     schwarze 2364:                return 0;
1.204     schwarze 2365:
                   2366:        while (1) {
1.261     schwarze 2367:                if (flags & ROFFNUM_WHITE)
1.204     schwarze 2368:                        while (isspace((unsigned char)v[*pos]))
                   2369:                                (*pos)++;
                   2370:
                   2371:                if ( ! roff_getop(v, pos, &operator))
                   2372:                        break;
                   2373:
1.261     schwarze 2374:                if (flags & ROFFNUM_WHITE)
1.204     schwarze 2375:                        while (isspace((unsigned char)v[*pos]))
                   2376:                                (*pos)++;
                   2377:
1.261     schwarze 2378:                if ( ! roff_evalpar(r, ln, v, pos, &operand2, flags))
1.277     schwarze 2379:                        return 0;
1.204     schwarze 2380:
1.261     schwarze 2381:                if (flags & ROFFNUM_WHITE)
1.204     schwarze 2382:                        while (isspace((unsigned char)v[*pos]))
                   2383:                                (*pos)++;
1.206     schwarze 2384:
                   2385:                if (NULL == res)
                   2386:                        continue;
1.204     schwarze 2387:
                   2388:                switch (operator) {
1.207     schwarze 2389:                case '+':
1.204     schwarze 2390:                        *res += operand2;
                   2391:                        break;
1.207     schwarze 2392:                case '-':
1.204     schwarze 2393:                        *res -= operand2;
                   2394:                        break;
1.207     schwarze 2395:                case '*':
1.204     schwarze 2396:                        *res *= operand2;
                   2397:                        break;
1.207     schwarze 2398:                case '/':
1.244     schwarze 2399:                        if (operand2 == 0) {
1.235     schwarze 2400:                                mandoc_msg(MANDOCERR_DIVZERO,
1.234     kristaps 2401:                                        r->parse, ln, *pos, v);
                   2402:                                *res = 0;
                   2403:                                break;
                   2404:                        }
1.204     schwarze 2405:                        *res /= operand2;
                   2406:                        break;
1.207     schwarze 2407:                case '%':
1.244     schwarze 2408:                        if (operand2 == 0) {
                   2409:                                mandoc_msg(MANDOCERR_DIVZERO,
                   2410:                                        r->parse, ln, *pos, v);
                   2411:                                *res = 0;
                   2412:                                break;
                   2413:                        }
1.204     schwarze 2414:                        *res %= operand2;
                   2415:                        break;
1.207     schwarze 2416:                case '<':
1.204     schwarze 2417:                        *res = *res < operand2;
                   2418:                        break;
1.207     schwarze 2419:                case '>':
1.204     schwarze 2420:                        *res = *res > operand2;
                   2421:                        break;
1.207     schwarze 2422:                case 'l':
1.204     schwarze 2423:                        *res = *res <= operand2;
                   2424:                        break;
1.207     schwarze 2425:                case 'g':
1.204     schwarze 2426:                        *res = *res >= operand2;
                   2427:                        break;
1.207     schwarze 2428:                case '=':
1.204     schwarze 2429:                        *res = *res == operand2;
                   2430:                        break;
1.207     schwarze 2431:                case '!':
1.204     schwarze 2432:                        *res = *res != operand2;
                   2433:                        break;
1.207     schwarze 2434:                case '&':
1.204     schwarze 2435:                        *res = *res && operand2;
                   2436:                        break;
1.207     schwarze 2437:                case ':':
1.204     schwarze 2438:                        *res = *res || operand2;
                   2439:                        break;
1.207     schwarze 2440:                case 'i':
1.204     schwarze 2441:                        if (operand2 < *res)
                   2442:                                *res = operand2;
                   2443:                        break;
1.207     schwarze 2444:                case 'a':
1.204     schwarze 2445:                        if (operand2 > *res)
                   2446:                                *res = operand2;
                   2447:                        break;
                   2448:                default:
                   2449:                        abort();
                   2450:                }
                   2451:        }
1.277     schwarze 2452:        return 1;
1.204     schwarze 2453: }
                   2454:
1.266     schwarze 2455: /* --- register management ------------------------------------------------ */
                   2456:
1.180     schwarze 2457: void
1.187     schwarze 2458: roff_setreg(struct roff *r, const char *name, int val, char sign)
1.147     kristaps 2459: {
1.180     schwarze 2460:        struct roffreg  *reg;
                   2461:
                   2462:        /* Search for an existing register with the same name. */
                   2463:        reg = r->regtab;
                   2464:
                   2465:        while (reg && strcmp(name, reg->key.p))
                   2466:                reg = reg->next;
1.147     kristaps 2467:
1.180     schwarze 2468:        if (NULL == reg) {
                   2469:                /* Create a new register. */
                   2470:                reg = mandoc_malloc(sizeof(struct roffreg));
                   2471:                reg->key.p = mandoc_strdup(name);
                   2472:                reg->key.sz = strlen(name);
1.187     schwarze 2473:                reg->val = 0;
1.180     schwarze 2474:                reg->next = r->regtab;
                   2475:                r->regtab = reg;
                   2476:        }
                   2477:
1.187     schwarze 2478:        if ('+' == sign)
                   2479:                reg->val += val;
                   2480:        else if ('-' == sign)
                   2481:                reg->val -= val;
                   2482:        else
                   2483:                reg->val = val;
1.147     kristaps 2484: }
                   2485:
1.192     schwarze 2486: /*
                   2487:  * Handle some predefined read-only number registers.
                   2488:  * For now, return -1 if the requested register is not predefined;
                   2489:  * in case a predefined read-only register having the value -1
                   2490:  * were to turn up, another special value would have to be chosen.
                   2491:  */
                   2492: static int
1.273     schwarze 2493: roff_getregro(const struct roff *r, const char *name)
1.192     schwarze 2494: {
                   2495:
                   2496:        switch (*name) {
1.273     schwarze 2497:        case '$':  /* Number of arguments of the last macro evaluated. */
1.277     schwarze 2498:                return r->argc;
1.207     schwarze 2499:        case 'A':  /* ASCII approximation mode is always off. */
1.277     schwarze 2500:                return 0;
1.207     schwarze 2501:        case 'g':  /* Groff compatibility mode is always on. */
1.277     schwarze 2502:                return 1;
1.207     schwarze 2503:        case 'H':  /* Fixed horizontal resolution. */
1.277     schwarze 2504:                return 24;
1.207     schwarze 2505:        case 'j':  /* Always adjust left margin only. */
1.277     schwarze 2506:                return 0;
1.207     schwarze 2507:        case 'T':  /* Some output device is always defined. */
1.277     schwarze 2508:                return 1;
1.207     schwarze 2509:        case 'V':  /* Fixed vertical resolution. */
1.277     schwarze 2510:                return 40;
1.192     schwarze 2511:        default:
1.277     schwarze 2512:                return -1;
1.192     schwarze 2513:        }
                   2514: }
                   2515:
1.181     schwarze 2516: int
1.180     schwarze 2517: roff_getreg(const struct roff *r, const char *name)
1.147     kristaps 2518: {
1.180     schwarze 2519:        struct roffreg  *reg;
1.192     schwarze 2520:        int              val;
                   2521:
                   2522:        if ('.' == name[0] && '\0' != name[1] && '\0' == name[2]) {
1.273     schwarze 2523:                val = roff_getregro(r, name + 1);
1.192     schwarze 2524:                if (-1 != val)
1.277     schwarze 2525:                        return val;
1.192     schwarze 2526:        }
1.180     schwarze 2527:
                   2528:        for (reg = r->regtab; reg; reg = reg->next)
                   2529:                if (0 == strcmp(name, reg->key.p))
1.277     schwarze 2530:                        return reg->val;
1.181     schwarze 2531:
1.277     schwarze 2532:        return 0;
1.181     schwarze 2533: }
                   2534:
                   2535: static int
                   2536: roff_getregn(const struct roff *r, const char *name, size_t len)
                   2537: {
                   2538:        struct roffreg  *reg;
1.192     schwarze 2539:        int              val;
                   2540:
                   2541:        if ('.' == name[0] && 2 == len) {
1.273     schwarze 2542:                val = roff_getregro(r, name + 1);
1.192     schwarze 2543:                if (-1 != val)
1.277     schwarze 2544:                        return val;
1.192     schwarze 2545:        }
1.181     schwarze 2546:
                   2547:        for (reg = r->regtab; reg; reg = reg->next)
                   2548:                if (len == reg->key.sz &&
                   2549:                    0 == strncmp(name, reg->key.p, len))
1.277     schwarze 2550:                        return reg->val;
1.271     schwarze 2551:
1.277     schwarze 2552:        return 0;
1.271     schwarze 2553: }
                   2554:
                   2555: static int
                   2556: roff_hasregn(const struct roff *r, const char *name, size_t len)
                   2557: {
                   2558:        struct roffreg  *reg;
                   2559:        int              val;
                   2560:
                   2561:        if ('.' == name[0] && 2 == len) {
1.273     schwarze 2562:                val = roff_getregro(r, name + 1);
1.271     schwarze 2563:                if (-1 != val)
1.277     schwarze 2564:                        return 1;
1.271     schwarze 2565:        }
                   2566:
                   2567:        for (reg = r->regtab; reg; reg = reg->next)
                   2568:                if (len == reg->key.sz &&
                   2569:                    0 == strncmp(name, reg->key.p, len))
1.277     schwarze 2570:                        return 1;
1.147     kristaps 2571:
1.277     schwarze 2572:        return 0;
1.147     kristaps 2573: }
                   2574:
1.180     schwarze 2575: static void
                   2576: roff_freereg(struct roffreg *reg)
1.147     kristaps 2577: {
1.180     schwarze 2578:        struct roffreg  *old_reg;
1.147     kristaps 2579:
1.180     schwarze 2580:        while (NULL != reg) {
                   2581:                free(reg->key.p);
                   2582:                old_reg = reg;
                   2583:                reg = reg->next;
                   2584:                free(old_reg);
                   2585:        }
1.147     kristaps 2586: }
1.92      schwarze 2587:
                   2588: static enum rofferr
1.89      kristaps 2589: roff_nr(ROFF_ARGS)
1.83      schwarze 2590: {
1.212     schwarze 2591:        char            *key, *val;
                   2592:        size_t           keysz;
1.138     kristaps 2593:        int              iv;
1.187     schwarze 2594:        char             sign;
1.89      kristaps 2595:
1.238     schwarze 2596:        key = val = buf->buf + pos;
                   2597:        if (*key == '\0')
1.277     schwarze 2598:                return ROFF_IGN;
1.212     schwarze 2599:
                   2600:        keysz = roff_getname(r, &val, ln, pos);
1.238     schwarze 2601:        if (key[keysz] == '\\')
1.277     schwarze 2602:                return ROFF_IGN;
1.212     schwarze 2603:        key[keysz] = '\0';
1.89      kristaps 2604:
1.187     schwarze 2605:        sign = *val;
1.238     schwarze 2606:        if (sign == '+' || sign == '-')
1.187     schwarze 2607:                val++;
                   2608:
1.261     schwarze 2609:        if (roff_evalnum(r, ln, val, NULL, &iv, ROFFNUM_SCALE))
1.204     schwarze 2610:                roff_setreg(r, key, iv, sign);
1.109     kristaps 2611:
1.277     schwarze 2612:        return ROFF_IGN;
1.203     schwarze 2613: }
                   2614:
                   2615: static enum rofferr
                   2616: roff_rr(ROFF_ARGS)
                   2617: {
                   2618:        struct roffreg  *reg, **prev;
1.212     schwarze 2619:        char            *name, *cp;
                   2620:        size_t           namesz;
1.203     schwarze 2621:
1.238     schwarze 2622:        name = cp = buf->buf + pos;
                   2623:        if (*name == '\0')
1.277     schwarze 2624:                return ROFF_IGN;
1.212     schwarze 2625:        namesz = roff_getname(r, &cp, ln, pos);
                   2626:        name[namesz] = '\0';
1.203     schwarze 2627:
                   2628:        prev = &r->regtab;
                   2629:        while (1) {
                   2630:                reg = *prev;
1.238     schwarze 2631:                if (reg == NULL || !strcmp(name, reg->key.p))
1.203     schwarze 2632:                        break;
                   2633:                prev = &reg->next;
                   2634:        }
1.238     schwarze 2635:        if (reg != NULL) {
1.203     schwarze 2636:                *prev = reg->next;
                   2637:                free(reg->key.p);
                   2638:                free(reg);
                   2639:        }
1.277     schwarze 2640:        return ROFF_IGN;
1.122     schwarze 2641: }
                   2642:
1.266     schwarze 2643: /* --- handler functions for roff requests -------------------------------- */
                   2644:
1.122     schwarze 2645: static enum rofferr
                   2646: roff_rm(ROFF_ARGS)
                   2647: {
                   2648:        const char       *name;
                   2649:        char             *cp;
1.212     schwarze 2650:        size_t            namesz;
1.122     schwarze 2651:
1.238     schwarze 2652:        cp = buf->buf + pos;
                   2653:        while (*cp != '\0') {
1.212     schwarze 2654:                name = cp;
1.238     schwarze 2655:                namesz = roff_getname(r, &cp, ln, (int)(cp - buf->buf));
1.212     schwarze 2656:                roff_setstrn(&r->strtab, name, namesz, NULL, 0, 0);
1.238     schwarze 2657:                if (name[namesz] == '\\')
1.212     schwarze 2658:                        break;
1.122     schwarze 2659:        }
1.277     schwarze 2660:        return ROFF_IGN;
1.178     schwarze 2661: }
                   2662:
                   2663: static enum rofferr
                   2664: roff_it(ROFF_ARGS)
                   2665: {
                   2666:        int              iv;
                   2667:
                   2668:        /* Parse the number of lines. */
1.261     schwarze 2669:
                   2670:        if ( ! roff_evalnum(r, ln, buf->buf, &pos, &iv, 0)) {
1.222     schwarze 2671:                mandoc_msg(MANDOCERR_IT_NONUM, r->parse,
1.238     schwarze 2672:                    ln, ppos, buf->buf + 1);
1.277     schwarze 2673:                return ROFF_IGN;
1.178     schwarze 2674:        }
                   2675:
1.262     schwarze 2676:        while (isspace((unsigned char)buf->buf[pos]))
                   2677:                pos++;
                   2678:
                   2679:        /*
                   2680:         * Arm the input line trap.
                   2681:         * Special-casing "an-trap" is an ugly workaround to cope
                   2682:         * with DocBook stupidly fiddling with man(7) internals.
                   2683:         */
1.261     schwarze 2684:
1.178     schwarze 2685:        roffit_lines = iv;
1.262     schwarze 2686:        roffit_macro = mandoc_strdup(iv != 1 ||
                   2687:            strcmp(buf->buf + pos, "an-trap") ?
                   2688:            buf->buf + pos : "br");
1.277     schwarze 2689:        return ROFF_IGN;
1.175     schwarze 2690: }
                   2691:
                   2692: static enum rofferr
                   2693: roff_Dd(ROFF_ARGS)
                   2694: {
                   2695:        const char *const       *cp;
                   2696:
1.227     schwarze 2697:        if ((r->options & (MPARSE_MDOC | MPARSE_QUICK)) == 0)
1.175     schwarze 2698:                for (cp = __mdoc_reserved; *cp; cp++)
                   2699:                        roff_setstr(r, *cp, NULL, 0);
                   2700:
1.227     schwarze 2701:        if (r->format == 0)
                   2702:                r->format = MPARSE_MDOC;
                   2703:
1.277     schwarze 2704:        return ROFF_CONT;
1.175     schwarze 2705: }
                   2706:
                   2707: static enum rofferr
                   2708: roff_TH(ROFF_ARGS)
                   2709: {
                   2710:        const char *const       *cp;
                   2711:
1.227     schwarze 2712:        if ((r->options & MPARSE_QUICK) == 0)
1.175     schwarze 2713:                for (cp = __man_reserved; *cp; cp++)
                   2714:                        roff_setstr(r, *cp, NULL, 0);
                   2715:
1.227     schwarze 2716:        if (r->format == 0)
                   2717:                r->format = MPARSE_MAN;
                   2718:
1.277     schwarze 2719:        return ROFF_CONT;
1.109     kristaps 2720: }
                   2721:
                   2722: static enum rofferr
                   2723: roff_TE(ROFF_ARGS)
                   2724: {
                   2725:
                   2726:        if (NULL == r->tbl)
1.221     schwarze 2727:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   2728:                    ln, ppos, "TE");
1.258     schwarze 2729:        else if ( ! tbl_end(&r->tbl)) {
                   2730:                free(buf->buf);
                   2731:                buf->buf = mandoc_strdup(".sp");
                   2732:                buf->sz = 4;
1.277     schwarze 2733:                return ROFF_REPARSE;
1.258     schwarze 2734:        }
1.277     schwarze 2735:        return ROFF_IGN;
1.112     kristaps 2736: }
                   2737:
                   2738: static enum rofferr
                   2739: roff_T_(ROFF_ARGS)
                   2740: {
                   2741:
                   2742:        if (NULL == r->tbl)
1.221     schwarze 2743:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   2744:                    ln, ppos, "T&");
1.112     kristaps 2745:        else
1.296     schwarze 2746:                tbl_restart(ln, ppos, r->tbl);
1.112     kristaps 2747:
1.277     schwarze 2748:        return ROFF_IGN;
1.109     kristaps 2749: }
                   2750:
1.230     schwarze 2751: /*
                   2752:  * Handle in-line equation delimiters.
                   2753:  */
                   2754: static enum rofferr
1.238     schwarze 2755: roff_eqndelim(struct roff *r, struct buf *buf, int pos)
1.151     kristaps 2756: {
1.233     schwarze 2757:        char            *cp1, *cp2;
                   2758:        const char      *bef_pr, *bef_nl, *mac, *aft_nl, *aft_pr;
1.151     kristaps 2759:
1.230     schwarze 2760:        /*
                   2761:         * Outside equations, look for an opening delimiter.
                   2762:         * If we are inside an equation, we already know it is
                   2763:         * in-line, or this function wouldn't have been called;
                   2764:         * so look for a closing delimiter.
                   2765:         */
                   2766:
1.238     schwarze 2767:        cp1 = buf->buf + pos;
1.230     schwarze 2768:        cp2 = strchr(cp1, r->eqn == NULL ?
                   2769:            r->last_eqn->odelim : r->last_eqn->cdelim);
                   2770:        if (cp2 == NULL)
1.277     schwarze 2771:                return ROFF_CONT;
1.230     schwarze 2772:
1.233     schwarze 2773:        *cp2++ = '\0';
                   2774:        bef_pr = bef_nl = aft_nl = aft_pr = "";
                   2775:
                   2776:        /* Handle preceding text, protecting whitespace. */
                   2777:
1.238     schwarze 2778:        if (*buf->buf != '\0') {
1.233     schwarze 2779:                if (r->eqn == NULL)
                   2780:                        bef_pr = "\\&";
                   2781:                bef_nl = "\n";
                   2782:        }
                   2783:
                   2784:        /*
                   2785:         * Prepare replacing the delimiter with an equation macro
                   2786:         * and drop leading white space from the equation.
                   2787:         */
1.230     schwarze 2788:
1.233     schwarze 2789:        if (r->eqn == NULL) {
                   2790:                while (*cp2 == ' ')
                   2791:                        cp2++;
                   2792:                mac = ".EQ";
                   2793:        } else
                   2794:                mac = ".EN";
                   2795:
                   2796:        /* Handle following text, protecting whitespace. */
                   2797:
                   2798:        if (*cp2 != '\0') {
                   2799:                aft_nl = "\n";
                   2800:                if (r->eqn != NULL)
                   2801:                        aft_pr = "\\&";
                   2802:        }
                   2803:
                   2804:        /* Do the actual replacement. */
                   2805:
1.238     schwarze 2806:        buf->sz = mandoc_asprintf(&cp1, "%s%s%s%s%s%s%s", buf->buf,
1.233     schwarze 2807:            bef_pr, bef_nl, mac, aft_nl, aft_pr, cp2) + 1;
1.238     schwarze 2808:        free(buf->buf);
                   2809:        buf->buf = cp1;
1.230     schwarze 2810:
                   2811:        /* Toggle the in-line state of the eqn subsystem. */
                   2812:
                   2813:        r->eqn_inline = r->eqn == NULL;
1.277     schwarze 2814:        return ROFF_REPARSE;
1.151     kristaps 2815: }
                   2816:
1.235     schwarze 2817: static enum rofferr
                   2818: roff_EQ(ROFF_ARGS)
1.125     kristaps 2819: {
1.151     kristaps 2820:        struct eqn_node *e;
1.125     kristaps 2821:
1.238     schwarze 2822:        assert(r->eqn == NULL);
1.235     schwarze 2823:        e = eqn_alloc(ppos, ln, r->parse);
1.125     kristaps 2824:
1.230     schwarze 2825:        if (r->last_eqn) {
1.125     kristaps 2826:                r->last_eqn->next = e;
1.230     schwarze 2827:                e->delim = r->last_eqn->delim;
                   2828:                e->odelim = r->last_eqn->odelim;
                   2829:                e->cdelim = r->last_eqn->cdelim;
                   2830:        } else
1.125     kristaps 2831:                r->first_eqn = r->last_eqn = e;
                   2832:
                   2833:        r->eqn = r->last_eqn = e;
1.151     kristaps 2834:
1.238     schwarze 2835:        if (buf->buf[pos] != '\0')
1.235     schwarze 2836:                mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
1.238     schwarze 2837:                    ".EQ %s", buf->buf + pos);
1.151     kristaps 2838:
1.277     schwarze 2839:        return ROFF_IGN;
1.125     kristaps 2840: }
                   2841:
                   2842: static enum rofferr
                   2843: roff_EN(ROFF_ARGS)
                   2844: {
                   2845:
1.221     schwarze 2846:        mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse, ln, ppos, "EN");
1.277     schwarze 2847:        return ROFF_IGN;
1.125     kristaps 2848: }
                   2849:
                   2850: static enum rofferr
1.109     kristaps 2851: roff_TS(ROFF_ARGS)
                   2852: {
1.176     schwarze 2853:        struct tbl_node *tbl;
1.89      kristaps 2854:
1.115     kristaps 2855:        if (r->tbl) {
1.221     schwarze 2856:                mandoc_msg(MANDOCERR_BLK_BROKEN, r->parse,
                   2857:                    ln, ppos, "TS breaks TS");
1.151     kristaps 2858:                tbl_end(&r->tbl);
1.115     kristaps 2859:        }
1.83      schwarze 2860:
1.176     schwarze 2861:        tbl = tbl_alloc(ppos, ln, r->parse);
1.113     kristaps 2862:
                   2863:        if (r->last_tbl)
1.176     schwarze 2864:                r->last_tbl->next = tbl;
1.113     kristaps 2865:        else
1.176     schwarze 2866:                r->first_tbl = r->last_tbl = tbl;
1.113     kristaps 2867:
1.176     schwarze 2868:        r->tbl = r->last_tbl = tbl;
1.297     schwarze 2869:        return ROFF_IGN;
                   2870: }
                   2871:
                   2872: static enum rofferr
                   2873: roff_onearg(ROFF_ARGS)
                   2874: {
                   2875:        struct roff_node        *n;
                   2876:        char                    *cp;
1.305     schwarze 2877:        int                      npos;
1.297     schwarze 2878:
1.302     schwarze 2879:        if (r->man->flags & (MAN_BLINE | MAN_ELINE) &&
                   2880:            (tok == ROFF_sp || tok == ROFF_ti))
                   2881:                man_breakscope(r->man, tok);
                   2882:
1.309   ! schwarze 2883:        if (roffce_node != NULL && (tok == ROFF_ce || tok == ROFF_rj)) {
1.305     schwarze 2884:                r->man->last = roffce_node;
                   2885:                r->man->next = ROFF_NEXT_SIBLING;
                   2886:        }
                   2887:
1.297     schwarze 2888:        roff_elem_alloc(r->man, ln, ppos, tok);
                   2889:        n = r->man->last;
                   2890:
                   2891:        cp = buf->buf + pos;
                   2892:        if (*cp != '\0') {
                   2893:                while (*cp != '\0' && *cp != ' ')
                   2894:                        cp++;
                   2895:                while (*cp == ' ')
                   2896:                        *cp++ = '\0';
                   2897:                if (*cp != '\0')
                   2898:                        mandoc_vmsg(MANDOCERR_ARG_EXCESS,
                   2899:                            r->parse, ln, cp - buf->buf,
                   2900:                            "%s ... %s", roff_name[tok], cp);
                   2901:                roff_word_alloc(r->man, ln, pos, buf->buf + pos);
1.300     schwarze 2902:        }
                   2903:
1.309   ! schwarze 2904:        if (tok == ROFF_ce || tok == ROFF_rj) {
        !          2905:                if (r->man->last->type == ROFFT_ELEM) {
1.305     schwarze 2906:                        roff_word_alloc(r->man, ln, pos, "1");
                   2907:                        r->man->last->flags |= NODE_NOSRC;
                   2908:                }
                   2909:                npos = 0;
                   2910:                if (roff_evalnum(r, ln, r->man->last->string, &npos,
                   2911:                    &roffce_lines, 0) == 0) {
                   2912:                        mandoc_vmsg(MANDOCERR_CE_NONUM,
                   2913:                            r->parse, ln, pos, "ce %s", buf->buf + pos);
                   2914:                        roffce_lines = 1;
                   2915:                }
                   2916:                if (roffce_lines < 1) {
                   2917:                        r->man->last = r->man->last->parent;
                   2918:                        roffce_node = NULL;
                   2919:                        roffce_lines = 0;
                   2920:                } else
                   2921:                        roffce_node = r->man->last->parent;
                   2922:        } else {
                   2923:                n->flags |= NODE_VALID | NODE_ENDED;
                   2924:                r->man->last = n;
                   2925:        }
                   2926:        n->flags |= NODE_LINE;
1.300     schwarze 2927:        r->man->next = ROFF_NEXT_SIBLING;
                   2928:        return ROFF_IGN;
                   2929: }
                   2930:
                   2931: static enum rofferr
                   2932: roff_manyarg(ROFF_ARGS)
                   2933: {
                   2934:        struct roff_node        *n;
                   2935:        char                    *sp, *ep;
                   2936:
                   2937:        roff_elem_alloc(r->man, ln, ppos, tok);
                   2938:        n = r->man->last;
                   2939:
                   2940:        for (sp = ep = buf->buf + pos; *sp != '\0'; sp = ep) {
                   2941:                while (*ep != '\0' && *ep != ' ')
                   2942:                        ep++;
                   2943:                while (*ep == ' ')
                   2944:                        *ep++ = '\0';
                   2945:                roff_word_alloc(r->man, ln, sp - buf->buf, sp);
1.297     schwarze 2946:        }
                   2947:
                   2948:        n->flags |= NODE_LINE | NODE_VALID | NODE_ENDED;
                   2949:        r->man->last = n;
                   2950:        r->man->next = ROFF_NEXT_SIBLING;
1.277     schwarze 2951:        return ROFF_IGN;
1.251     schwarze 2952: }
                   2953:
                   2954: static enum rofferr
1.296     schwarze 2955: roff_br(ROFF_ARGS)
1.251     schwarze 2956: {
1.302     schwarze 2957:        if (r->man->flags & (MAN_BLINE | MAN_ELINE))
                   2958:                man_breakscope(r->man, ROFF_br);
1.296     schwarze 2959:        roff_elem_alloc(r->man, ln, ppos, ROFF_br);
                   2960:        if (buf->buf[pos] != '\0')
                   2961:                mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
                   2962:                    "%s %s", roff_name[tok], buf->buf + pos);
                   2963:        r->man->last->flags |= NODE_LINE | NODE_VALID | NODE_ENDED;
                   2964:        r->man->next = ROFF_NEXT_SIBLING;
                   2965:        return ROFF_IGN;
1.92      schwarze 2966: }
                   2967:
1.105     kristaps 2968: static enum rofferr
1.174     kristaps 2969: roff_cc(ROFF_ARGS)
                   2970: {
                   2971:        const char      *p;
                   2972:
1.238     schwarze 2973:        p = buf->buf + pos;
1.174     kristaps 2974:
1.238     schwarze 2975:        if (*p == '\0' || (r->control = *p++) == '.')
1.303     schwarze 2976:                r->control = '\0';
1.174     kristaps 2977:
1.238     schwarze 2978:        if (*p != '\0')
1.260     schwarze 2979:                mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
                   2980:                    ln, p - buf->buf, "cc ... %s", p);
1.174     kristaps 2981:
1.277     schwarze 2982:        return ROFF_IGN;
1.174     kristaps 2983: }
                   2984:
                   2985: static enum rofferr
1.303     schwarze 2986: roff_ec(ROFF_ARGS)
                   2987: {
                   2988:        const char      *p;
                   2989:
                   2990:        p = buf->buf + pos;
                   2991:        if (*p == '\0')
                   2992:                r->escape = '\\';
                   2993:        else {
                   2994:                r->escape = *p;
                   2995:                if (*++p != '\0')
                   2996:                        mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
                   2997:                            ln, p - buf->buf, "ec ... %s", p);
                   2998:        }
                   2999:        return ROFF_IGN;
                   3000: }
                   3001:
                   3002: static enum rofferr
                   3003: roff_eo(ROFF_ARGS)
                   3004: {
                   3005:        r->escape = '\0';
                   3006:        if (buf->buf[pos] != '\0')
                   3007:                mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse,
                   3008:                    ln, pos, "eo %s", buf->buf + pos);
                   3009:        return ROFF_IGN;
                   3010: }
                   3011:
                   3012: static enum rofferr
1.164     kristaps 3013: roff_tr(ROFF_ARGS)
                   3014: {
                   3015:        const char      *p, *first, *second;
                   3016:        size_t           fsz, ssz;
                   3017:        enum mandoc_esc  esc;
                   3018:
1.238     schwarze 3019:        p = buf->buf + pos;
1.164     kristaps 3020:
1.238     schwarze 3021:        if (*p == '\0') {
1.260     schwarze 3022:                mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse, ln, ppos, "tr");
1.277     schwarze 3023:                return ROFF_IGN;
1.164     kristaps 3024:        }
                   3025:
1.238     schwarze 3026:        while (*p != '\0') {
1.164     kristaps 3027:                fsz = ssz = 1;
                   3028:
                   3029:                first = p++;
1.238     schwarze 3030:                if (*first == '\\') {
1.164     kristaps 3031:                        esc = mandoc_escape(&p, NULL, NULL);
1.238     schwarze 3032:                        if (esc == ESCAPE_ERROR) {
1.219     schwarze 3033:                                mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238     schwarze 3034:                                    ln, (int)(p - buf->buf), first);
1.277     schwarze 3035:                                return ROFF_IGN;
1.164     kristaps 3036:                        }
                   3037:                        fsz = (size_t)(p - first);
                   3038:                }
                   3039:
                   3040:                second = p++;
1.238     schwarze 3041:                if (*second == '\\') {
1.164     kristaps 3042:                        esc = mandoc_escape(&p, NULL, NULL);
1.238     schwarze 3043:                        if (esc == ESCAPE_ERROR) {
1.219     schwarze 3044:                                mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238     schwarze 3045:                                    ln, (int)(p - buf->buf), second);
1.277     schwarze 3046:                                return ROFF_IGN;
1.164     kristaps 3047:                        }
                   3048:                        ssz = (size_t)(p - second);
1.238     schwarze 3049:                } else if (*second == '\0') {
1.260     schwarze 3050:                        mandoc_vmsg(MANDOCERR_TR_ODD, r->parse,
                   3051:                            ln, first - buf->buf, "tr %s", first);
1.164     kristaps 3052:                        second = " ";
1.165     kristaps 3053:                        p--;
1.164     kristaps 3054:                }
                   3055:
1.167     kristaps 3056:                if (fsz > 1) {
1.207     schwarze 3057:                        roff_setstrn(&r->xmbtab, first, fsz,
                   3058:                            second, ssz, 0);
1.167     kristaps 3059:                        continue;
                   3060:                }
                   3061:
1.238     schwarze 3062:                if (r->xtab == NULL)
1.207     schwarze 3063:                        r->xtab = mandoc_calloc(128,
                   3064:                            sizeof(struct roffstr));
1.167     kristaps 3065:
                   3066:                free(r->xtab[(int)*first].p);
                   3067:                r->xtab[(int)*first].p = mandoc_strndup(second, ssz);
                   3068:                r->xtab[(int)*first].sz = ssz;
1.164     kristaps 3069:        }
                   3070:
1.277     schwarze 3071:        return ROFF_IGN;
1.164     kristaps 3072: }
                   3073:
                   3074: static enum rofferr
1.306     schwarze 3075: roff_rn(ROFF_ARGS)
                   3076: {
                   3077:        const char      *value;
                   3078:        char            *oldn, *newn, *end;
                   3079:        size_t           oldsz, newsz;
                   3080:
                   3081:        oldn = newn = buf->buf + pos;
                   3082:        if (*oldn == '\0')
                   3083:                return ROFF_IGN;
                   3084:
                   3085:        oldsz = roff_getname(r, &newn, ln, pos);
                   3086:        if (oldn[oldsz] == '\\' || *newn == '\0')
                   3087:                return ROFF_IGN;
                   3088:
                   3089:        end = newn;
                   3090:        newsz = roff_getname(r, &end, ln, newn - buf->buf);
                   3091:        if (newsz == 0)
                   3092:                return ROFF_IGN;
                   3093:
                   3094:        /*
                   3095:         * Rename a user-defined macro bearing the old name,
                   3096:         * overriding an existing renamed high-level macro
                   3097:         * bearing the new name, if that exists.
                   3098:         */
                   3099:
                   3100:        if ((value = roff_getstrn(r, oldn, oldsz)) != NULL) {
                   3101:                roff_setstrn(&r->strtab, newn, newsz, value, strlen(value), 0);
                   3102:                roff_setstrn(&r->strtab, oldn, oldsz, NULL, 0, 0);
                   3103:                roff_setstrn(&r->rentab, newn, newsz, NULL, 0, 0);
                   3104:                return ROFF_IGN;
                   3105:        }
                   3106:
                   3107:        /*
                   3108:         * Rename a high-level macro bearing the old name,
                   3109:         * either renaming it a second time if it was already
                   3110:         * renamed before, or renaming it for the first time.
                   3111:         * In both cases, override an existing user-defined
                   3112:         * macro bearing the new name, if that exists.
                   3113:         */
                   3114:
                   3115:        if ((value = roff_getrenn(r, oldn, oldsz)) != NULL) {
                   3116:                roff_setstrn(&r->rentab, newn, newsz, value, strlen(value), 0);
                   3117:                roff_setstrn(&r->rentab, oldn, oldsz, NULL, 0, 0);
                   3118:        } else
                   3119:                roff_setstrn(&r->rentab, newn, newsz, oldn, oldsz, 0);
                   3120:        roff_setstrn(&r->strtab, newn, newsz, NULL, 0, 0);
                   3121:        return ROFF_IGN;
                   3122: }
                   3123:
                   3124: static enum rofferr
1.105     kristaps 3125: roff_so(ROFF_ARGS)
                   3126: {
1.249     schwarze 3127:        char *name, *cp;
1.105     kristaps 3128:
1.238     schwarze 3129:        name = buf->buf + pos;
1.224     schwarze 3130:        mandoc_vmsg(MANDOCERR_SO, r->parse, ln, ppos, "so %s", name);
1.105     kristaps 3131:
                   3132:        /*
                   3133:         * Handle `so'.  Be EXTREMELY careful, as we shouldn't be
                   3134:         * opening anything that's not in our cwd or anything beneath
                   3135:         * it.  Thus, explicitly disallow traversing up the file-system
                   3136:         * or using absolute paths.
                   3137:         */
                   3138:
1.238     schwarze 3139:        if (*name == '/' || strstr(name, "../") || strstr(name, "/..")) {
1.210     schwarze 3140:                mandoc_vmsg(MANDOCERR_SO_PATH, r->parse, ln, ppos,
                   3141:                    ".so %s", name);
1.249     schwarze 3142:                buf->sz = mandoc_asprintf(&cp,
                   3143:                    ".sp\nSee the file %s.\n.sp", name) + 1;
                   3144:                free(buf->buf);
                   3145:                buf->buf = cp;
                   3146:                *offs = 0;
1.277     schwarze 3147:                return ROFF_REPARSE;
1.105     kristaps 3148:        }
                   3149:
                   3150:        *offs = pos;
1.277     schwarze 3151:        return ROFF_SO;
1.105     kristaps 3152: }
1.92      schwarze 3153:
1.266     schwarze 3154: /* --- user defined strings and macros ------------------------------------ */
                   3155:
1.106     kristaps 3156: static enum rofferr
                   3157: roff_userdef(ROFF_ARGS)
1.99      kristaps 3158: {
1.263     schwarze 3159:        const char       *arg[9], *ap;
1.106     kristaps 3160:        char             *cp, *n1, *n2;
1.292     schwarze 3161:        int               expand_count, i, ib, ie;
1.263     schwarze 3162:        size_t            asz, rsz;
1.106     kristaps 3163:
                   3164:        /*
                   3165:         * Collect pointers to macro argument strings
1.188     schwarze 3166:         * and NUL-terminate them.
1.106     kristaps 3167:         */
1.263     schwarze 3168:
1.273     schwarze 3169:        r->argc = 0;
1.238     schwarze 3170:        cp = buf->buf + pos;
1.273     schwarze 3171:        for (i = 0; i < 9; i++) {
                   3172:                if (*cp == '\0')
                   3173:                        arg[i] = "";
                   3174:                else {
                   3175:                        arg[i] = mandoc_getarg(r->parse, &cp, ln, &pos);
                   3176:                        r->argc = i + 1;
                   3177:                }
                   3178:        }
1.99      kristaps 3179:
1.106     kristaps 3180:        /*
                   3181:         * Expand macro arguments.
1.99      kristaps 3182:         */
1.263     schwarze 3183:
                   3184:        buf->sz = strlen(r->current_string) + 1;
1.292     schwarze 3185:        n1 = n2 = cp = mandoc_malloc(buf->sz);
1.263     schwarze 3186:        memcpy(n1, r->current_string, buf->sz);
1.292     schwarze 3187:        expand_count = 0;
1.263     schwarze 3188:        while (*cp != '\0') {
                   3189:
                   3190:                /* Scan ahead for the next argument invocation. */
                   3191:
                   3192:                if (*cp++ != '\\')
                   3193:                        continue;
                   3194:                if (*cp++ != '$')
                   3195:                        continue;
1.274     schwarze 3196:                if (*cp == '*') {  /* \\$* inserts all arguments */
                   3197:                        ib = 0;
                   3198:                        ie = r->argc - 1;
                   3199:                } else {  /* \\$1 .. \\$9 insert one argument */
                   3200:                        ib = ie = *cp - '1';
                   3201:                        if (ib < 0 || ib > 8)
                   3202:                                continue;
                   3203:                }
1.263     schwarze 3204:                cp -= 2;
1.292     schwarze 3205:
                   3206:                /*
                   3207:                 * Prevent infinite recursion.
                   3208:                 */
                   3209:
                   3210:                if (cp >= n2)
                   3211:                        expand_count = 1;
                   3212:                else if (++expand_count > EXPAND_LIMIT) {
                   3213:                        mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
                   3214:                            ln, (int)(cp - n1), NULL);
1.293     schwarze 3215:                        free(buf->buf);
                   3216:                        buf->buf = n1;
1.292     schwarze 3217:                        return ROFF_IGN;
                   3218:                }
1.263     schwarze 3219:
                   3220:                /*
                   3221:                 * Determine the size of the expanded argument,
                   3222:                 * taking escaping of quotes into account.
                   3223:                 */
                   3224:
1.274     schwarze 3225:                asz = ie > ib ? ie - ib : 0;  /* for blanks */
                   3226:                for (i = ib; i <= ie; i++) {
                   3227:                        for (ap = arg[i]; *ap != '\0'; ap++) {
                   3228:                                asz++;
                   3229:                                if (*ap == '"')
                   3230:                                        asz += 3;
                   3231:                        }
1.263     schwarze 3232:                }
                   3233:                if (asz != 3) {
                   3234:
                   3235:                        /*
                   3236:                         * Determine the size of the rest of the
                   3237:                         * unexpanded macro, including the NUL.
                   3238:                         */
                   3239:
                   3240:                        rsz = buf->sz - (cp - n1) - 3;
                   3241:
                   3242:                        /*
                   3243:                         * When shrinking, move before
                   3244:                         * releasing the storage.
                   3245:                         */
                   3246:
                   3247:                        if (asz < 3)
                   3248:                                memmove(cp + asz, cp + 3, rsz);
                   3249:
                   3250:                        /*
                   3251:                         * Resize the storage for the macro
                   3252:                         * and readjust the parse pointer.
                   3253:                         */
                   3254:
                   3255:                        buf->sz += asz - 3;
                   3256:                        n2 = mandoc_realloc(n1, buf->sz);
                   3257:                        cp = n2 + (cp - n1);
                   3258:                        n1 = n2;
                   3259:
                   3260:                        /*
                   3261:                         * When growing, make room
                   3262:                         * for the expanded argument.
                   3263:                         */
                   3264:
                   3265:                        if (asz > 3)
                   3266:                                memmove(cp + asz, cp + 3, rsz);
                   3267:                }
                   3268:
                   3269:                /* Copy the expanded argument, escaping quotes. */
                   3270:
                   3271:                n2 = cp;
1.274     schwarze 3272:                for (i = ib; i <= ie; i++) {
                   3273:                        for (ap = arg[i]; *ap != '\0'; ap++) {
                   3274:                                if (*ap == '"') {
                   3275:                                        memcpy(n2, "\\(dq", 4);
                   3276:                                        n2 += 4;
                   3277:                                } else
                   3278:                                        *n2++ = *ap;
                   3279:                        }
                   3280:                        if (i < ie)
                   3281:                                *n2++ = ' ';
1.106     kristaps 3282:                }
1.99      kristaps 3283:        }
                   3284:
1.106     kristaps 3285:        /*
                   3286:         * Replace the macro invocation
                   3287:         * by the expanded macro.
                   3288:         */
1.263     schwarze 3289:
1.238     schwarze 3290:        free(buf->buf);
                   3291:        buf->buf = n1;
1.248     schwarze 3292:        *offs = 0;
1.106     kristaps 3293:
1.277     schwarze 3294:        return buf->sz > 1 && buf->buf[buf->sz - 2] == '\n' ?
                   3295:           ROFF_REPARSE : ROFF_APPEND;
1.99      kristaps 3296: }
1.121     schwarze 3297:
1.306     schwarze 3298: /*
                   3299:  * Calling a high-level macro that was renamed with .rn.
                   3300:  * r->current_string has already been set up by roff_parse().
                   3301:  */
                   3302: static enum rofferr
                   3303: roff_renamed(ROFF_ARGS)
                   3304: {
                   3305:        char    *nbuf;
                   3306:
                   3307:        buf->sz = mandoc_asprintf(&nbuf, ".%s %s", r->current_string,
                   3308:            buf->buf + pos) + 1;
                   3309:        free(buf->buf);
                   3310:        buf->buf = nbuf;
                   3311:        return ROFF_CONT;
                   3312: }
                   3313:
1.212     schwarze 3314: static size_t
1.121     schwarze 3315: roff_getname(struct roff *r, char **cpp, int ln, int pos)
                   3316: {
                   3317:        char     *name, *cp;
1.212     schwarze 3318:        size_t    namesz;
1.121     schwarze 3319:
                   3320:        name = *cpp;
                   3321:        if ('\0' == *name)
1.277     schwarze 3322:                return 0;
1.121     schwarze 3323:
1.212     schwarze 3324:        /* Read until end of name and terminate it with NUL. */
                   3325:        for (cp = name; 1; cp++) {
                   3326:                if ('\0' == *cp || ' ' == *cp) {
                   3327:                        namesz = cp - name;
                   3328:                        break;
                   3329:                }
1.121     schwarze 3330:                if ('\\' != *cp)
                   3331:                        continue;
1.215     schwarze 3332:                namesz = cp - name;
                   3333:                if ('{' == cp[1] || '}' == cp[1])
                   3334:                        break;
1.121     schwarze 3335:                cp++;
                   3336:                if ('\\' == *cp)
                   3337:                        continue;
1.224     schwarze 3338:                mandoc_vmsg(MANDOCERR_NAMESC, r->parse, ln, pos,
                   3339:                    "%.*s", (int)(cp - name + 1), name);
1.212     schwarze 3340:                mandoc_escape((const char **)&cp, NULL, NULL);
                   3341:                break;
1.121     schwarze 3342:        }
                   3343:
                   3344:        /* Read past spaces. */
                   3345:        while (' ' == *cp)
                   3346:                cp++;
                   3347:
                   3348:        *cpp = cp;
1.277     schwarze 3349:        return namesz;
1.121     schwarze 3350: }
                   3351:
1.106     kristaps 3352: /*
                   3353:  * Store *string into the user-defined string called *name.
                   3354:  * To clear an existing entry, call with (*r, *name, NULL, 0).
1.193     schwarze 3355:  * append == 0: replace mode
                   3356:  * append == 1: single-line append mode
                   3357:  * append == 2: multiline append mode, append '\n' after each call
1.106     kristaps 3358:  */
1.94      kristaps 3359: static void
1.106     kristaps 3360: roff_setstr(struct roff *r, const char *name, const char *string,
1.193     schwarze 3361:        int append)
1.92      schwarze 3362: {
1.164     kristaps 3363:
                   3364:        roff_setstrn(&r->strtab, name, strlen(name), string,
1.207     schwarze 3365:            string ? strlen(string) : 0, append);
1.164     kristaps 3366: }
                   3367:
                   3368: static void
1.166     kristaps 3369: roff_setstrn(struct roffkv **r, const char *name, size_t namesz,
1.193     schwarze 3370:                const char *string, size_t stringsz, int append)
1.164     kristaps 3371: {
1.166     kristaps 3372:        struct roffkv   *n;
1.164     kristaps 3373:        char            *c;
                   3374:        int              i;
                   3375:        size_t           oldch, newch;
1.92      schwarze 3376:
1.106     kristaps 3377:        /* Search for an existing string with the same name. */
1.164     kristaps 3378:        n = *r;
                   3379:
1.211     schwarze 3380:        while (n && (namesz != n->key.sz ||
                   3381:                        strncmp(n->key.p, name, namesz)))
1.92      schwarze 3382:                n = n->next;
1.94      kristaps 3383:
                   3384:        if (NULL == n) {
1.106     kristaps 3385:                /* Create a new string table entry. */
1.166     kristaps 3386:                n = mandoc_malloc(sizeof(struct roffkv));
                   3387:                n->key.p = mandoc_strndup(name, namesz);
                   3388:                n->key.sz = namesz;
                   3389:                n->val.p = NULL;
                   3390:                n->val.sz = 0;
1.164     kristaps 3391:                n->next = *r;
                   3392:                *r = n;
1.193     schwarze 3393:        } else if (0 == append) {
1.166     kristaps 3394:                free(n->val.p);
                   3395:                n->val.p = NULL;
                   3396:                n->val.sz = 0;
1.106     kristaps 3397:        }
                   3398:
                   3399:        if (NULL == string)
                   3400:                return;
                   3401:
                   3402:        /*
                   3403:         * One additional byte for the '\n' in multiline mode,
                   3404:         * and one for the terminating '\0'.
                   3405:         */
1.193     schwarze 3406:        newch = stringsz + (1 < append ? 2u : 1u);
1.164     kristaps 3407:
1.166     kristaps 3408:        if (NULL == n->val.p) {
                   3409:                n->val.p = mandoc_malloc(newch);
                   3410:                *n->val.p = '\0';
1.106     kristaps 3411:                oldch = 0;
                   3412:        } else {
1.166     kristaps 3413:                oldch = n->val.sz;
                   3414:                n->val.p = mandoc_realloc(n->val.p, oldch + newch);
1.106     kristaps 3415:        }
                   3416:
                   3417:        /* Skip existing content in the destination buffer. */
1.166     kristaps 3418:        c = n->val.p + (int)oldch;
1.106     kristaps 3419:
                   3420:        /* Append new content to the destination buffer. */
1.164     kristaps 3421:        i = 0;
                   3422:        while (i < (int)stringsz) {
1.106     kristaps 3423:                /*
                   3424:                 * Rudimentary roff copy mode:
                   3425:                 * Handle escaped backslashes.
                   3426:                 */
1.164     kristaps 3427:                if ('\\' == string[i] && '\\' == string[i + 1])
                   3428:                        i++;
                   3429:                *c++ = string[i++];
1.106     kristaps 3430:        }
1.94      kristaps 3431:
1.106     kristaps 3432:        /* Append terminating bytes. */
1.193     schwarze 3433:        if (1 < append)
1.106     kristaps 3434:                *c++ = '\n';
1.163     kristaps 3435:
1.106     kristaps 3436:        *c = '\0';
1.166     kristaps 3437:        n->val.sz = (int)(c - n->val.p);
1.92      schwarze 3438: }
                   3439:
1.94      kristaps 3440: static const char *
                   3441: roff_getstrn(const struct roff *r, const char *name, size_t len)
1.92      schwarze 3442: {
1.166     kristaps 3443:        const struct roffkv *n;
1.191     schwarze 3444:        int i;
1.92      schwarze 3445:
1.164     kristaps 3446:        for (n = r->strtab; n; n = n->next)
1.207     schwarze 3447:                if (0 == strncmp(name, n->key.p, len) &&
                   3448:                    '\0' == n->key.p[(int)len])
1.277     schwarze 3449:                        return n->val.p;
1.191     schwarze 3450:
                   3451:        for (i = 0; i < PREDEFS_MAX; i++)
                   3452:                if (0 == strncmp(name, predefs[i].name, len) &&
                   3453:                                '\0' == predefs[i].name[(int)len])
1.277     schwarze 3454:                        return predefs[i].str;
1.306     schwarze 3455:
                   3456:        return NULL;
                   3457: }
                   3458:
                   3459: /*
                   3460:  * Check whether *name is the renamed name of a high-level macro.
                   3461:  * Return the standard name, or NULL if it is not.
                   3462:  */
                   3463: static const char *
                   3464: roff_getrenn(const struct roff *r, const char *name, size_t len)
                   3465: {
                   3466:        const struct roffkv *n;
                   3467:
                   3468:        for (n = r->rentab; n; n = n->next)
                   3469:                if (0 == strncmp(name, n->key.p, len) &&
                   3470:                    '\0' == n->key.p[(int)len])
                   3471:                        return n->val.p;
1.94      kristaps 3472:
1.277     schwarze 3473:        return NULL;
1.92      schwarze 3474: }
                   3475:
1.94      kristaps 3476: static void
1.167     kristaps 3477: roff_freestr(struct roffkv *r)
1.92      schwarze 3478: {
1.166     kristaps 3479:        struct roffkv    *n, *nn;
1.92      schwarze 3480:
1.167     kristaps 3481:        for (n = r; n; n = nn) {
1.166     kristaps 3482:                free(n->key.p);
                   3483:                free(n->val.p);
1.92      schwarze 3484:                nn = n->next;
                   3485:                free(n);
                   3486:        }
1.114     kristaps 3487: }
1.266     schwarze 3488:
                   3489: /* --- accessors and utility functions ------------------------------------ */
1.114     kristaps 3490:
                   3491: const struct tbl_span *
                   3492: roff_span(const struct roff *r)
                   3493: {
1.207     schwarze 3494:
1.277     schwarze 3495:        return r->tbl ? tbl_span(r->tbl) : NULL;
1.125     kristaps 3496: }
                   3497:
                   3498: const struct eqn *
                   3499: roff_eqn(const struct roff *r)
                   3500: {
1.207     schwarze 3501:
1.277     schwarze 3502:        return r->last_eqn ? &r->last_eqn->eqn : NULL;
1.164     kristaps 3503: }
                   3504:
                   3505: /*
                   3506:  * Duplicate an input string, making the appropriate character
                   3507:  * conversations (as stipulated by `tr') along the way.
                   3508:  * Returns a heap-allocated string with all the replacements made.
                   3509:  */
                   3510: char *
                   3511: roff_strdup(const struct roff *r, const char *p)
                   3512: {
1.166     kristaps 3513:        const struct roffkv *cp;
1.164     kristaps 3514:        char            *res;
                   3515:        const char      *pp;
                   3516:        size_t           ssz, sz;
                   3517:        enum mandoc_esc  esc;
                   3518:
1.167     kristaps 3519:        if (NULL == r->xmbtab && NULL == r->xtab)
1.277     schwarze 3520:                return mandoc_strdup(p);
1.164     kristaps 3521:        else if ('\0' == *p)
1.277     schwarze 3522:                return mandoc_strdup("");
1.164     kristaps 3523:
                   3524:        /*
                   3525:         * Step through each character looking for term matches
                   3526:         * (remember that a `tr' can be invoked with an escape, which is
                   3527:         * a glyph but the escape is multi-character).
                   3528:         * We only do this if the character hash has been initialised
                   3529:         * and the string is >0 length.
                   3530:         */
                   3531:
                   3532:        res = NULL;
                   3533:        ssz = 0;
                   3534:
                   3535:        while ('\0' != *p) {
1.289     schwarze 3536:                assert((unsigned int)*p < 128);
                   3537:                if ('\\' != *p && r->xtab && r->xtab[(unsigned int)*p].p) {
1.167     kristaps 3538:                        sz = r->xtab[(int)*p].sz;
                   3539:                        res = mandoc_realloc(res, ssz + sz + 1);
                   3540:                        memcpy(res + ssz, r->xtab[(int)*p].p, sz);
                   3541:                        ssz += sz;
                   3542:                        p++;
                   3543:                        continue;
                   3544:                } else if ('\\' != *p) {
                   3545:                        res = mandoc_realloc(res, ssz + 2);
                   3546:                        res[ssz++] = *p++;
                   3547:                        continue;
                   3548:                }
                   3549:
1.164     kristaps 3550:                /* Search for term matches. */
1.167     kristaps 3551:                for (cp = r->xmbtab; cp; cp = cp->next)
1.166     kristaps 3552:                        if (0 == strncmp(p, cp->key.p, cp->key.sz))
1.164     kristaps 3553:                                break;
                   3554:
                   3555:                if (NULL != cp) {
                   3556:                        /*
                   3557:                         * A match has been found.
                   3558:                         * Append the match to the array and move
                   3559:                         * forward by its keysize.
                   3560:                         */
1.207     schwarze 3561:                        res = mandoc_realloc(res,
                   3562:                            ssz + cp->val.sz + 1);
1.166     kristaps 3563:                        memcpy(res + ssz, cp->val.p, cp->val.sz);
                   3564:                        ssz += cp->val.sz;
                   3565:                        p += (int)cp->key.sz;
1.164     kristaps 3566:                        continue;
                   3567:                }
                   3568:
1.167     kristaps 3569:                /*
                   3570:                 * Handle escapes carefully: we need to copy
                   3571:                 * over just the escape itself, or else we might
                   3572:                 * do replacements within the escape itself.
                   3573:                 * Make sure to pass along the bogus string.
                   3574:                 */
                   3575:                pp = p++;
                   3576:                esc = mandoc_escape(&p, NULL, NULL);
                   3577:                if (ESCAPE_ERROR == esc) {
                   3578:                        sz = strlen(pp);
1.164     kristaps 3579:                        res = mandoc_realloc(res, ssz + sz + 1);
                   3580:                        memcpy(res + ssz, pp, sz);
1.167     kristaps 3581:                        break;
1.164     kristaps 3582:                }
1.207     schwarze 3583:                /*
                   3584:                 * We bail out on bad escapes.
1.167     kristaps 3585:                 * No need to warn: we already did so when
                   3586:                 * roff_res() was called.
                   3587:                 */
                   3588:                sz = (int)(p - pp);
                   3589:                res = mandoc_realloc(res, ssz + sz + 1);
                   3590:                memcpy(res + ssz, pp, sz);
                   3591:                ssz += sz;
1.164     kristaps 3592:        }
                   3593:
                   3594:        res[(int)ssz] = '\0';
1.277     schwarze 3595:        return res;
1.227     schwarze 3596: }
                   3597:
                   3598: int
                   3599: roff_getformat(const struct roff *r)
                   3600: {
                   3601:
1.277     schwarze 3602:        return r->format;
1.174     kristaps 3603: }
                   3604:
                   3605: /*
1.207     schwarze 3606:  * Find out whether a line is a macro line or not.
1.174     kristaps 3607:  * If it is, adjust the current position and return one; if it isn't,
                   3608:  * return zero and don't change the current position.
                   3609:  * If the control character has been set with `.cc', then let that grain
                   3610:  * precedence.
                   3611:  * This is slighly contrary to groff, where using the non-breaking
                   3612:  * control character when `cc' has been invoked will cause the
                   3613:  * non-breaking macro contents to be printed verbatim.
                   3614:  */
                   3615: int
                   3616: roff_getcontrol(const struct roff *r, const char *cp, int *ppos)
                   3617: {
                   3618:        int             pos;
                   3619:
                   3620:        pos = *ppos;
                   3621:
1.303     schwarze 3622:        if (r->control != '\0' && cp[pos] == r->control)
1.174     kristaps 3623:                pos++;
1.303     schwarze 3624:        else if (r->control != '\0')
1.277     schwarze 3625:                return 0;
1.174     kristaps 3626:        else if ('\\' == cp[pos] && '.' == cp[pos + 1])
                   3627:                pos += 2;
                   3628:        else if ('.' == cp[pos] || '\'' == cp[pos])
                   3629:                pos++;
                   3630:        else
1.277     schwarze 3631:                return 0;
1.174     kristaps 3632:
                   3633:        while (' ' == cp[pos] || '\t' == cp[pos])
                   3634:                pos++;
                   3635:
                   3636:        *ppos = pos;
1.277     schwarze 3637:        return 1;
1.74      kristaps 3638: }

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