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Annotation of mandoc/roff.c, Revision 1.236

1.236   ! schwarze    1: /*     $Id: roff.c,v 1.235 2014/10/25 14:35:37 schwarze Exp $ */
1.1       kristaps    2: /*
1.175     schwarze    3:  * Copyright (c) 2010, 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
1.190     schwarze    4:  * Copyright (c) 2010-2014 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>
1.178     schwarze   24: #include <stdio.h>
1.1       kristaps   25: #include <stdlib.h>
1.67      kristaps   26: #include <string.h>
1.1       kristaps   27:
1.67      kristaps   28: #include "mandoc.h"
1.201     schwarze   29: #include "mandoc_aux.h"
1.226     schwarze   30: #include "libmandoc.h"
1.109     kristaps   31: #include "libroff.h"
1.33      kristaps   32:
1.141     kristaps   33: /* Maximum number of nested if-else conditionals. */
1.82      kristaps   34: #define        RSTACK_MAX      128
                     35:
1.170     schwarze   36: /* Maximum number of string expansions per line, to break infinite loops. */
                     37: #define        EXPAND_LIMIT    1000
                     38:
1.67      kristaps   39: enum   rofft {
1.103     kristaps   40:        ROFF_ad,
1.80      kristaps   41:        ROFF_am,
                     42:        ROFF_ami,
                     43:        ROFF_am1,
1.193     schwarze   44:        ROFF_as,
1.174     kristaps   45:        ROFF_cc,
1.194     schwarze   46:        ROFF_ce,
1.80      kristaps   47:        ROFF_de,
                     48:        ROFF_dei,
                     49:        ROFF_de1,
1.83      schwarze   50:        ROFF_ds,
1.82      kristaps   51:        ROFF_el,
1.185     schwarze   52:        ROFF_fam,
1.186     schwarze   53:        ROFF_hw,
1.103     kristaps   54:        ROFF_hy,
1.82      kristaps   55:        ROFF_ie,
1.75      kristaps   56:        ROFF_if,
1.76      kristaps   57:        ROFF_ig,
1.123     schwarze   58:        ROFF_it,
1.103     kristaps   59:        ROFF_ne,
                     60:        ROFF_nh,
1.104     kristaps   61:        ROFF_nr,
1.124     schwarze   62:        ROFF_ns,
1.229     schwarze   63:        ROFF_pl,
1.124     schwarze   64:        ROFF_ps,
1.83      schwarze   65:        ROFF_rm,
1.203     schwarze   66:        ROFF_rr,
1.105     kristaps   67:        ROFF_so,
1.124     schwarze   68:        ROFF_ta,
1.83      schwarze   69:        ROFF_tr,
1.175     schwarze   70:        ROFF_Dd,
                     71:        ROFF_TH,
1.109     kristaps   72:        ROFF_TS,
                     73:        ROFF_TE,
1.112     kristaps   74:        ROFF_T_,
1.125     kristaps   75:        ROFF_EQ,
                     76:        ROFF_EN,
1.76      kristaps   77:        ROFF_cblock,
1.106     kristaps   78:        ROFF_USERDEF,
1.67      kristaps   79:        ROFF_MAX
                     80: };
                     81:
1.147     kristaps   82: /*
1.167     kristaps   83:  * An incredibly-simple string buffer.
                     84:  */
1.94      kristaps   85: struct roffstr {
1.167     kristaps   86:        char            *p; /* nil-terminated buffer */
                     87:        size_t           sz; /* saved strlen(p) */
1.166     kristaps   88: };
                     89:
                     90: /*
1.167     kristaps   91:  * A key-value roffstr pair as part of a singly-linked list.
1.166     kristaps   92:  */
                     93: struct roffkv {
                     94:        struct roffstr   key;
                     95:        struct roffstr   val;
                     96:        struct roffkv   *next; /* next in list */
1.94      kristaps   97: };
                     98:
1.180     schwarze   99: /*
                    100:  * A single number register as part of a singly-linked list.
                    101:  */
                    102: struct roffreg {
                    103:        struct roffstr   key;
1.181     schwarze  104:        int              val;
1.180     schwarze  105:        struct roffreg  *next;
                    106: };
                    107:
1.67      kristaps  108: struct roff {
1.128     kristaps  109:        struct mparse   *parse; /* parse point */
1.67      kristaps  110:        struct roffnode *last; /* leaf of stack */
1.223     schwarze  111:        int             *rstack; /* stack of inverted `ie' values */
1.180     schwarze  112:        struct roffreg  *regtab; /* number registers */
1.166     kristaps  113:        struct roffkv   *strtab; /* user-defined strings & macros */
1.167     kristaps  114:        struct roffkv   *xmbtab; /* multi-byte trans table (`tr') */
                    115:        struct roffstr  *xtab; /* single-byte trans table (`tr') */
1.106     kristaps  116:        const char      *current_string; /* value of last called user macro */
1.118     kristaps  117:        struct tbl_node *first_tbl; /* first table parsed */
                    118:        struct tbl_node *last_tbl; /* last table parsed */
                    119:        struct tbl_node *tbl; /* current table being parsed */
1.125     kristaps  120:        struct eqn_node *last_eqn; /* last equation parsed */
                    121:        struct eqn_node *first_eqn; /* first equation parsed */
                    122:        struct eqn_node *eqn; /* current equation being parsed */
1.230     schwarze  123:        int              eqn_inline; /* current equation is inline */
1.223     schwarze  124:        int              options; /* parse options */
                    125:        int              rstacksz; /* current size limit of rstack */
                    126:        int              rstackpos; /* position in rstack */
1.227     schwarze  127:        int              format; /* current file in mdoc or man format */
1.223     schwarze  128:        char             control; /* control character */
1.79      kristaps  129: };
                    130:
1.67      kristaps  131: struct roffnode {
                    132:        enum rofft       tok; /* type of node */
                    133:        struct roffnode *parent; /* up one in stack */
                    134:        int              line; /* parse line */
                    135:        int              col; /* parse col */
1.106     kristaps  136:        char            *name; /* node name, e.g. macro name */
1.79      kristaps  137:        char            *end; /* end-rules: custom token */
                    138:        int              endspan; /* end-rules: next-line or infty */
1.198     schwarze  139:        int              rule; /* current evaluation rule */
1.67      kristaps  140: };
                    141:
                    142: #define        ROFF_ARGS        struct roff *r, /* parse ctx */ \
1.72      kristaps  143:                         enum rofft tok, /* tok of macro */ \
1.207     schwarze  144:                         char **bufp, /* input buffer */ \
1.67      kristaps  145:                         size_t *szp, /* size of input buffer */ \
                    146:                         int ln, /* parse line */ \
1.75      kristaps  147:                         int ppos, /* original pos in buffer */ \
                    148:                         int pos, /* current pos in buffer */ \
1.74      kristaps  149:                         int *offs /* reset offset of buffer data */
1.67      kristaps  150:
                    151: typedef        enum rofferr (*roffproc)(ROFF_ARGS);
                    152:
                    153: struct roffmac {
                    154:        const char      *name; /* macro name */
1.79      kristaps  155:        roffproc         proc; /* process new macro */
                    156:        roffproc         text; /* process as child text of macro */
                    157:        roffproc         sub; /* process as child of macro */
                    158:        int              flags;
                    159: #define        ROFFMAC_STRUCT  (1 << 0) /* always interpret */
1.85      kristaps  160:        struct roffmac  *next;
1.67      kristaps  161: };
                    162:
1.141     kristaps  163: struct predef {
                    164:        const char      *name; /* predefined input name */
                    165:        const char      *str; /* replacement symbol */
                    166: };
                    167:
                    168: #define        PREDEF(__name, __str) \
                    169:        { (__name), (__str) },
                    170:
1.155     kristaps  171: static enum rofft       roffhash_find(const char *, size_t);
                    172: static void             roffhash_init(void);
                    173: static void             roffnode_cleanscope(struct roff *);
                    174: static void             roffnode_pop(struct roff *);
                    175: static void             roffnode_push(struct roff *, enum rofft,
                    176:                                const char *, int, int);
1.80      kristaps  177: static enum rofferr     roff_block(ROFF_ARGS);
                    178: static enum rofferr     roff_block_text(ROFF_ARGS);
                    179: static enum rofferr     roff_block_sub(ROFF_ARGS);
                    180: static enum rofferr     roff_cblock(ROFF_ARGS);
1.174     kristaps  181: static enum rofferr     roff_cc(ROFF_ARGS);
1.195     schwarze  182: static void             roff_ccond(struct roff *, int, int);
1.82      kristaps  183: static enum rofferr     roff_cond(ROFF_ARGS);
                    184: static enum rofferr     roff_cond_text(ROFF_ARGS);
                    185: static enum rofferr     roff_cond_sub(ROFF_ARGS);
1.92      schwarze  186: static enum rofferr     roff_ds(ROFF_ARGS);
1.230     schwarze  187: static enum rofferr     roff_eqndelim(struct roff *,
                    188:                                char **, size_t *, int);
1.234     kristaps  189: static int              roff_evalcond(struct roff *r, int,
                    190:                                const char *, int *);
                    191: static int              roff_evalnum(struct roff *, int,
                    192:                                const char *, int *, int *, int);
                    193: static int              roff_evalpar(struct roff *, int,
                    194:                                const char *, int *, int *);
1.198     schwarze  195: static int              roff_evalstrcond(const char *, int *);
1.155     kristaps  196: static void             roff_free1(struct roff *);
1.180     schwarze  197: static void             roff_freereg(struct roffreg *);
1.167     kristaps  198: static void             roff_freestr(struct roffkv *);
1.212     schwarze  199: static size_t           roff_getname(struct roff *, char **, int, int);
1.184     schwarze  200: static int              roff_getnum(const char *, int *, int *);
                    201: static int              roff_getop(const char *, int *, char *);
1.181     schwarze  202: static int              roff_getregn(const struct roff *,
                    203:                                const char *, size_t);
1.192     schwarze  204: static int              roff_getregro(const char *name);
1.207     schwarze  205: static const char      *roff_getstrn(const struct roff *,
1.94      kristaps  206:                                const char *, size_t);
1.178     schwarze  207: static enum rofferr     roff_it(ROFF_ARGS);
1.103     kristaps  208: static enum rofferr     roff_line_ignore(ROFF_ARGS);
1.89      kristaps  209: static enum rofferr     roff_nr(ROFF_ARGS);
1.214     schwarze  210: static enum rofft       roff_parse(struct roff *, char *, int *,
                    211:                                int, int);
1.178     schwarze  212: static enum rofferr     roff_parsetext(char **, size_t *, int, int *);
1.207     schwarze  213: static enum rofferr     roff_res(struct roff *,
1.142     kristaps  214:                                char **, size_t *, int, int);
1.122     schwarze  215: static enum rofferr     roff_rm(ROFF_ARGS);
1.203     schwarze  216: static enum rofferr     roff_rr(ROFF_ARGS);
1.94      kristaps  217: static void             roff_setstr(struct roff *,
1.106     kristaps  218:                                const char *, const char *, int);
1.207     schwarze  219: static void             roff_setstrn(struct roffkv **, const char *,
1.164     kristaps  220:                                size_t, const char *, size_t, int);
1.105     kristaps  221: static enum rofferr     roff_so(ROFF_ARGS);
1.164     kristaps  222: static enum rofferr     roff_tr(ROFF_ARGS);
1.175     schwarze  223: static enum rofferr     roff_Dd(ROFF_ARGS);
                    224: static enum rofferr     roff_TH(ROFF_ARGS);
1.109     kristaps  225: static enum rofferr     roff_TE(ROFF_ARGS);
                    226: static enum rofferr     roff_TS(ROFF_ARGS);
1.125     kristaps  227: static enum rofferr     roff_EQ(ROFF_ARGS);
                    228: static enum rofferr     roff_EN(ROFF_ARGS);
1.112     kristaps  229: static enum rofferr     roff_T_(ROFF_ARGS);
1.106     kristaps  230: static enum rofferr     roff_userdef(ROFF_ARGS);
1.67      kristaps  231:
1.155     kristaps  232: /* See roffhash_find() */
1.85      kristaps  233:
                    234: #define        ASCII_HI         126
                    235: #define        ASCII_LO         33
                    236: #define        HASHWIDTH       (ASCII_HI - ASCII_LO + 1)
                    237:
                    238: static struct roffmac  *hash[HASHWIDTH];
                    239:
                    240: static struct roffmac   roffs[ROFF_MAX] = {
1.103     kristaps  241:        { "ad", roff_line_ignore, NULL, NULL, 0, NULL },
1.85      kristaps  242:        { "am", roff_block, roff_block_text, roff_block_sub, 0, NULL },
                    243:        { "ami", roff_block, roff_block_text, roff_block_sub, 0, NULL },
                    244:        { "am1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.193     schwarze  245:        { "as", roff_ds, NULL, NULL, 0, NULL },
1.174     kristaps  246:        { "cc", roff_cc, NULL, NULL, 0, NULL },
1.194     schwarze  247:        { "ce", roff_line_ignore, NULL, NULL, 0, NULL },
1.85      kristaps  248:        { "de", roff_block, roff_block_text, roff_block_sub, 0, NULL },
                    249:        { "dei", roff_block, roff_block_text, roff_block_sub, 0, NULL },
                    250:        { "de1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.92      schwarze  251:        { "ds", roff_ds, NULL, NULL, 0, NULL },
1.85      kristaps  252:        { "el", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
1.185     schwarze  253:        { "fam", roff_line_ignore, NULL, NULL, 0, NULL },
1.186     schwarze  254:        { "hw", roff_line_ignore, NULL, NULL, 0, NULL },
1.103     kristaps  255:        { "hy", roff_line_ignore, NULL, NULL, 0, NULL },
1.85      kristaps  256:        { "ie", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
                    257:        { "if", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
                    258:        { "ig", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.178     schwarze  259:        { "it", roff_it, NULL, NULL, 0, NULL },
1.103     kristaps  260:        { "ne", roff_line_ignore, NULL, NULL, 0, NULL },
                    261:        { "nh", roff_line_ignore, NULL, NULL, 0, NULL },
1.104     kristaps  262:        { "nr", roff_nr, NULL, NULL, 0, NULL },
1.124     schwarze  263:        { "ns", roff_line_ignore, NULL, NULL, 0, NULL },
1.229     schwarze  264:        { "pl", roff_line_ignore, NULL, NULL, 0, NULL },
1.124     schwarze  265:        { "ps", roff_line_ignore, NULL, NULL, 0, NULL },
1.122     schwarze  266:        { "rm", roff_rm, NULL, NULL, 0, NULL },
1.203     schwarze  267:        { "rr", roff_rr, NULL, NULL, 0, NULL },
1.105     kristaps  268:        { "so", roff_so, NULL, NULL, 0, NULL },
1.124     schwarze  269:        { "ta", roff_line_ignore, NULL, NULL, 0, NULL },
1.164     kristaps  270:        { "tr", roff_tr, NULL, NULL, 0, NULL },
1.175     schwarze  271:        { "Dd", roff_Dd, NULL, NULL, 0, NULL },
                    272:        { "TH", roff_TH, NULL, NULL, 0, NULL },
1.109     kristaps  273:        { "TS", roff_TS, NULL, NULL, 0, NULL },
                    274:        { "TE", roff_TE, NULL, NULL, 0, NULL },
1.112     kristaps  275:        { "T&", roff_T_, NULL, NULL, 0, NULL },
1.125     kristaps  276:        { "EQ", roff_EQ, NULL, NULL, 0, NULL },
                    277:        { "EN", roff_EN, NULL, NULL, 0, NULL },
1.85      kristaps  278:        { ".", roff_cblock, NULL, NULL, 0, NULL },
1.106     kristaps  279:        { NULL, roff_userdef, NULL, NULL, 0, NULL },
1.67      kristaps  280: };
                    281:
1.200     schwarze  282: /* not currently implemented: Ds em Eq LP Me PP pp Or Rd Sf SH */
1.175     schwarze  283: const  char *const __mdoc_reserved[] = {
                    284:        "Ac", "Ad", "An", "Ao", "Ap", "Aq", "Ar", "At",
                    285:        "Bc", "Bd", "Bf", "Bk", "Bl", "Bo", "Bq",
                    286:        "Brc", "Bro", "Brq", "Bsx", "Bt", "Bx",
                    287:        "Cd", "Cm", "Db", "Dc", "Dd", "Dl", "Do", "Dq",
1.200     schwarze  288:        "Dt", "Dv", "Dx", "D1",
                    289:        "Ec", "Ed", "Ef", "Ek", "El", "Em",
                    290:        "En", "Eo", "Er", "Es", "Ev", "Ex",
1.175     schwarze  291:        "Fa", "Fc", "Fd", "Fl", "Fn", "Fo", "Fr", "Ft", "Fx",
1.200     schwarze  292:        "Hf", "Ic", "In", "It", "Lb", "Li", "Lk", "Lp",
                    293:        "Ms", "Mt", "Nd", "Nm", "No", "Ns", "Nx",
1.175     schwarze  294:        "Oc", "Oo", "Op", "Os", "Ot", "Ox",
1.200     schwarze  295:        "Pa", "Pc", "Pf", "Po", "Pp", "Pq",
                    296:        "Qc", "Ql", "Qo", "Qq", "Re", "Rs", "Rv",
                    297:        "Sc", "Sh", "Sm", "So", "Sq",
1.175     schwarze  298:        "Ss", "St", "Sx", "Sy",
                    299:        "Ta", "Tn", "Ud", "Ux", "Va", "Vt", "Xc", "Xo", "Xr",
1.200     schwarze  300:        "%A", "%B", "%C", "%D", "%I", "%J", "%N", "%O",
1.175     schwarze  301:        "%P", "%Q", "%R", "%T", "%U", "%V",
                    302:        NULL
                    303: };
                    304:
1.200     schwarze  305: /* not currently implemented: BT DE DS ME MT PT SY TQ YS */
1.175     schwarze  306: const  char *const __man_reserved[] = {
1.200     schwarze  307:        "AT", "B", "BI", "BR", "DT",
                    308:        "EE", "EN", "EQ", "EX", "HP", "I", "IB", "IP", "IR",
                    309:        "LP", "OP", "P", "PD", "PP",
                    310:        "R", "RB", "RE", "RI", "RS", "SB", "SH", "SM", "SS",
                    311:        "TE", "TH", "TP", "TS", "T&", "UC", "UE", "UR",
1.175     schwarze  312:        NULL
                    313: };
                    314:
1.141     kristaps  315: /* Array of injected predefined strings. */
                    316: #define        PREDEFS_MAX      38
                    317: static const struct predef predefs[PREDEFS_MAX] = {
                    318: #include "predefs.in"
                    319: };
                    320:
1.155     kristaps  321: /* See roffhash_find() */
1.85      kristaps  322: #define        ROFF_HASH(p)    (p[0] - ASCII_LO)
                    323:
1.178     schwarze  324: static int      roffit_lines;  /* number of lines to delay */
                    325: static char    *roffit_macro;  /* nil-terminated macro line */
                    326:
1.207     schwarze  327:
1.85      kristaps  328: static void
1.155     kristaps  329: roffhash_init(void)
1.85      kristaps  330: {
                    331:        struct roffmac   *n;
                    332:        int               buc, i;
                    333:
1.106     kristaps  334:        for (i = 0; i < (int)ROFF_USERDEF; i++) {
1.85      kristaps  335:                assert(roffs[i].name[0] >= ASCII_LO);
                    336:                assert(roffs[i].name[0] <= ASCII_HI);
                    337:
                    338:                buc = ROFF_HASH(roffs[i].name);
                    339:
                    340:                if (NULL != (n = hash[buc])) {
                    341:                        for ( ; n->next; n = n->next)
                    342:                                /* Do nothing. */ ;
                    343:                        n->next = &roffs[i];
                    344:                } else
                    345:                        hash[buc] = &roffs[i];
                    346:        }
                    347: }
                    348:
1.67      kristaps  349: /*
                    350:  * Look up a roff token by its name.  Returns ROFF_MAX if no macro by
                    351:  * the nil-terminated string name could be found.
                    352:  */
                    353: static enum rofft
1.155     kristaps  354: roffhash_find(const char *p, size_t s)
1.67      kristaps  355: {
1.85      kristaps  356:        int              buc;
                    357:        struct roffmac  *n;
1.67      kristaps  358:
1.85      kristaps  359:        /*
                    360:         * libroff has an extremely simple hashtable, for the time
                    361:         * being, which simply keys on the first character, which must
                    362:         * be printable, then walks a chain.  It works well enough until
                    363:         * optimised.
                    364:         */
                    365:
                    366:        if (p[0] < ASCII_LO || p[0] > ASCII_HI)
                    367:                return(ROFF_MAX);
                    368:
                    369:        buc = ROFF_HASH(p);
                    370:
                    371:        if (NULL == (n = hash[buc]))
                    372:                return(ROFF_MAX);
                    373:        for ( ; n; n = n->next)
1.106     kristaps  374:                if (0 == strncmp(n->name, p, s) && '\0' == n->name[(int)s])
1.85      kristaps  375:                        return((enum rofft)(n - roffs));
1.67      kristaps  376:
                    377:        return(ROFF_MAX);
                    378: }
                    379:
                    380: /*
                    381:  * Pop the current node off of the stack of roff instructions currently
                    382:  * pending.
                    383:  */
                    384: static void
                    385: roffnode_pop(struct roff *r)
                    386: {
                    387:        struct roffnode *p;
                    388:
1.75      kristaps  389:        assert(r->last);
1.207     schwarze  390:        p = r->last;
1.82      kristaps  391:
1.75      kristaps  392:        r->last = r->last->parent;
1.106     kristaps  393:        free(p->name);
                    394:        free(p->end);
1.67      kristaps  395:        free(p);
                    396: }
                    397:
                    398: /*
                    399:  * Push a roff node onto the instruction stack.  This must later be
                    400:  * removed with roffnode_pop().
                    401:  */
1.98      schwarze  402: static void
1.106     kristaps  403: roffnode_push(struct roff *r, enum rofft tok, const char *name,
                    404:                int line, int col)
1.67      kristaps  405: {
                    406:        struct roffnode *p;
                    407:
1.98      schwarze  408:        p = mandoc_calloc(1, sizeof(struct roffnode));
1.67      kristaps  409:        p->tok = tok;
1.106     kristaps  410:        if (name)
                    411:                p->name = mandoc_strdup(name);
1.67      kristaps  412:        p->parent = r->last;
                    413:        p->line = line;
                    414:        p->col = col;
1.198     schwarze  415:        p->rule = p->parent ? p->parent->rule : 0;
1.67      kristaps  416:
                    417:        r->last = p;
                    418: }
                    419:
                    420: static void
                    421: roff_free1(struct roff *r)
                    422: {
1.176     schwarze  423:        struct tbl_node *tbl;
1.125     kristaps  424:        struct eqn_node *e;
1.167     kristaps  425:        int              i;
1.67      kristaps  426:
1.176     schwarze  427:        while (NULL != (tbl = r->first_tbl)) {
                    428:                r->first_tbl = tbl->next;
                    429:                tbl_free(tbl);
1.109     kristaps  430:        }
1.113     kristaps  431:        r->first_tbl = r->last_tbl = r->tbl = NULL;
                    432:
1.125     kristaps  433:        while (NULL != (e = r->first_eqn)) {
                    434:                r->first_eqn = e->next;
                    435:                eqn_free(e);
                    436:        }
                    437:        r->first_eqn = r->last_eqn = r->eqn = NULL;
                    438:
1.67      kristaps  439:        while (r->last)
                    440:                roffnode_pop(r);
1.109     kristaps  441:
1.223     schwarze  442:        free (r->rstack);
                    443:        r->rstack = NULL;
                    444:        r->rstacksz = 0;
                    445:        r->rstackpos = -1;
                    446:
                    447:        roff_freereg(r->regtab);
                    448:        r->regtab = NULL;
                    449:
1.167     kristaps  450:        roff_freestr(r->strtab);
                    451:        roff_freestr(r->xmbtab);
                    452:        r->strtab = r->xmbtab = NULL;
                    453:
                    454:        if (r->xtab)
                    455:                for (i = 0; i < 128; i++)
                    456:                        free(r->xtab[i].p);
                    457:        free(r->xtab);
                    458:        r->xtab = NULL;
1.67      kristaps  459: }
                    460:
                    461: void
                    462: roff_reset(struct roff *r)
                    463: {
                    464:
                    465:        roff_free1(r);
1.227     schwarze  466:        r->format = r->options & (MPARSE_MDOC | MPARSE_MAN);
1.174     kristaps  467:        r->control = 0;
1.67      kristaps  468: }
                    469:
                    470: void
                    471: roff_free(struct roff *r)
                    472: {
                    473:
                    474:        roff_free1(r);
                    475:        free(r);
                    476: }
                    477:
                    478: struct roff *
1.199     schwarze  479: roff_alloc(struct mparse *parse, int options)
1.67      kristaps  480: {
                    481:        struct roff     *r;
                    482:
1.98      schwarze  483:        r = mandoc_calloc(1, sizeof(struct roff));
1.128     kristaps  484:        r->parse = parse;
1.199     schwarze  485:        r->options = options;
1.227     schwarze  486:        r->format = options & (MPARSE_MDOC | MPARSE_MAN);
1.82      kristaps  487:        r->rstackpos = -1;
1.207     schwarze  488:
1.155     kristaps  489:        roffhash_init();
1.141     kristaps  490:
1.67      kristaps  491:        return(r);
                    492: }
                    493:
1.94      kristaps  494: /*
1.206     schwarze  495:  * In the current line, expand escape sequences that tend to get
                    496:  * used in numerical expressions and conditional requests.
                    497:  * Also check the syntax of the remaining escape sequences.
1.154     kristaps  498:  */
1.172     schwarze  499: static enum rofferr
1.142     kristaps  500: roff_res(struct roff *r, char **bufp, size_t *szp, int ln, int pos)
1.94      kristaps  501: {
1.208     schwarze  502:        char             ubuf[24]; /* buffer to print the number */
1.205     schwarze  503:        const char      *start; /* start of the string to process */
1.209     schwarze  504:        char            *stesc; /* start of an escape sequence ('\\') */
1.108     schwarze  505:        const char      *stnam; /* start of the name, after "[(*" */
                    506:        const char      *cp;    /* end of the name, e.g. before ']' */
                    507:        const char      *res;   /* the string to be substituted */
1.181     schwarze  508:        char            *nbuf;  /* new buffer to copy bufp to */
                    509:        size_t           maxl;  /* expected length of the escape name */
                    510:        size_t           naml;  /* actual length of the escape name */
                    511:        int              expand_count;  /* to avoid infinite loops */
1.206     schwarze  512:        int              npos;  /* position in numeric expression */
1.218     schwarze  513:        int              arg_complete; /* argument not interrupted by eol */
1.206     schwarze  514:        char             term;  /* character terminating the escape */
1.94      kristaps  515:
1.170     schwarze  516:        expand_count = 0;
1.205     schwarze  517:        start = *bufp + pos;
                    518:        stesc = strchr(start, '\0') - 1;
                    519:        while (stesc-- > start) {
1.170     schwarze  520:
1.205     schwarze  521:                /* Search backwards for the next backslash. */
                    522:
                    523:                if ('\\' != *stesc)
                    524:                        continue;
                    525:
                    526:                /* If it is escaped, skip it. */
                    527:
                    528:                for (cp = stesc - 1; cp >= start; cp--)
                    529:                        if ('\\' != *cp)
                    530:                                break;
                    531:
                    532:                if (0 == (stesc - cp) % 2) {
1.209     schwarze  533:                        stesc = (char *)cp;
1.205     schwarze  534:                        continue;
                    535:                }
1.108     schwarze  536:
1.206     schwarze  537:                /* Decide whether to expand or to check only. */
1.108     schwarze  538:
1.206     schwarze  539:                term = '\0';
1.205     schwarze  540:                cp = stesc + 1;
1.181     schwarze  541:                switch (*cp) {
1.207     schwarze  542:                case '*':
1.181     schwarze  543:                        res = NULL;
                    544:                        break;
1.207     schwarze  545:                case 'B':
1.206     schwarze  546:                        /* FALLTHROUGH */
1.207     schwarze  547:                case 'w':
1.206     schwarze  548:                        term = cp[1];
                    549:                        /* FALLTHROUGH */
1.207     schwarze  550:                case 'n':
1.181     schwarze  551:                        res = ubuf;
                    552:                        break;
                    553:                default:
1.205     schwarze  554:                        if (ESCAPE_ERROR == mandoc_escape(&cp, NULL, NULL))
1.219     schwarze  555:                                mandoc_vmsg(MANDOCERR_ESC_BAD,
                    556:                                    r->parse, ln, (int)(stesc - *bufp),
                    557:                                    "%.*s", (int)(cp - stesc), stesc);
1.205     schwarze  558:                        continue;
1.152     kristaps  559:                }
                    560:
1.205     schwarze  561:                if (EXPAND_LIMIT < ++expand_count) {
                    562:                        mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
                    563:                            ln, (int)(stesc - *bufp), NULL);
                    564:                        return(ROFF_IGN);
                    565:                }
1.108     schwarze  566:
                    567:                /*
                    568:                 * The third character decides the length
1.181     schwarze  569:                 * of the name of the string or register.
1.108     schwarze  570:                 * Save a pointer to the name.
                    571:                 */
                    572:
1.206     schwarze  573:                if ('\0' == term) {
                    574:                        switch (*++cp) {
1.207     schwarze  575:                        case '\0':
1.206     schwarze  576:                                maxl = 0;
                    577:                                break;
1.207     schwarze  578:                        case '(':
1.206     schwarze  579:                                cp++;
                    580:                                maxl = 2;
                    581:                                break;
1.207     schwarze  582:                        case '[':
1.206     schwarze  583:                                cp++;
                    584:                                term = ']';
                    585:                                maxl = 0;
                    586:                                break;
                    587:                        default:
                    588:                                maxl = 1;
                    589:                                break;
                    590:                        }
                    591:                } else {
                    592:                        cp += 2;
1.94      kristaps  593:                        maxl = 0;
                    594:                }
1.108     schwarze  595:                stnam = cp;
1.94      kristaps  596:
1.108     schwarze  597:                /* Advance to the end of the name. */
1.94      kristaps  598:
1.218     schwarze  599:                arg_complete = 1;
1.181     schwarze  600:                for (naml = 0; 0 == maxl || naml < maxl; naml++, cp++) {
1.153     kristaps  601:                        if ('\0' == *cp) {
1.219     schwarze  602:                                mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
                    603:                                    ln, (int)(stesc - *bufp), stesc);
1.218     schwarze  604:                                arg_complete = 0;
1.206     schwarze  605:                                break;
1.153     kristaps  606:                        }
1.206     schwarze  607:                        if (0 == maxl && *cp == term) {
                    608:                                cp++;
1.94      kristaps  609:                                break;
1.206     schwarze  610:                        }
1.94      kristaps  611:                }
                    612:
1.108     schwarze  613:                /*
                    614:                 * Retrieve the replacement string; if it is
                    615:                 * undefined, resume searching for escapes.
                    616:                 */
                    617:
1.206     schwarze  618:                switch (stesc[1]) {
1.207     schwarze  619:                case '*':
1.218     schwarze  620:                        if (arg_complete)
                    621:                                res = roff_getstrn(r, stnam, naml);
1.206     schwarze  622:                        break;
1.207     schwarze  623:                case 'B':
1.206     schwarze  624:                        npos = 0;
1.218     schwarze  625:                        ubuf[0] = arg_complete &&
1.234     kristaps  626:                            roff_evalnum(r, ln, stnam, &npos, NULL, 0) &&
1.218     schwarze  627:                            stnam + npos + 1 == cp ? '1' : '0';
1.206     schwarze  628:                        ubuf[1] = '\0';
                    629:                        break;
1.207     schwarze  630:                case 'n':
1.218     schwarze  631:                        if (arg_complete)
                    632:                                (void)snprintf(ubuf, sizeof(ubuf), "%d",
                    633:                                    roff_getregn(r, stnam, naml));
                    634:                        else
                    635:                                ubuf[0] = '\0';
1.206     schwarze  636:                        break;
1.207     schwarze  637:                case 'w':
1.218     schwarze  638:                        /* use even incomplete args */
1.208     schwarze  639:                        (void)snprintf(ubuf, sizeof(ubuf), "%d",
1.206     schwarze  640:                            24 * (int)naml);
                    641:                        break;
                    642:                }
1.94      kristaps  643:
                    644:                if (NULL == res) {
1.219     schwarze  645:                        mandoc_vmsg(MANDOCERR_STR_UNDEF,
                    646:                            r->parse, ln, (int)(stesc - *bufp),
                    647:                            "%.*s", (int)naml, stnam);
1.142     kristaps  648:                        res = "";
1.94      kristaps  649:                }
                    650:
1.108     schwarze  651:                /* Replace the escape sequence by the string. */
                    652:
1.209     schwarze  653:                *stesc = '\0';
                    654:                *szp = mandoc_asprintf(&nbuf, "%s%s%s",
                    655:                    *bufp, res, cp) + 1;
1.94      kristaps  656:
1.205     schwarze  657:                /* Prepare for the next replacement. */
1.94      kristaps  658:
1.205     schwarze  659:                start = nbuf + pos;
1.209     schwarze  660:                stesc = nbuf + (stesc - *bufp) + strlen(res);
1.94      kristaps  661:                free(*bufp);
1.181     schwarze  662:                *bufp = nbuf;
1.154     kristaps  663:        }
1.172     schwarze  664:        return(ROFF_CONT);
1.154     kristaps  665: }
                    666:
                    667: /*
1.178     schwarze  668:  * Process text streams:
                    669:  * Convert all breakable hyphens into ASCII_HYPH.
                    670:  * Decrement and spring input line trap.
1.154     kristaps  671:  */
                    672: static enum rofferr
1.178     schwarze  673: roff_parsetext(char **bufp, size_t *szp, int pos, int *offs)
1.154     kristaps  674: {
                    675:        size_t           sz;
                    676:        const char      *start;
1.178     schwarze  677:        char            *p;
                    678:        int              isz;
1.154     kristaps  679:        enum mandoc_esc  esc;
                    680:
1.178     schwarze  681:        start = p = *bufp + pos;
1.154     kristaps  682:
                    683:        while ('\0' != *p) {
                    684:                sz = strcspn(p, "-\\");
                    685:                p += sz;
                    686:
1.159     kristaps  687:                if ('\0' == *p)
                    688:                        break;
                    689:
1.154     kristaps  690:                if ('\\' == *p) {
                    691:                        /* Skip over escapes. */
                    692:                        p++;
1.189     schwarze  693:                        esc = mandoc_escape((const char **)&p, NULL, NULL);
1.154     kristaps  694:                        if (ESCAPE_ERROR == esc)
                    695:                                break;
1.155     kristaps  696:                        continue;
1.159     kristaps  697:                } else if (p == start) {
1.158     kristaps  698:                        p++;
1.155     kristaps  699:                        continue;
1.158     kristaps  700:                }
1.155     kristaps  701:
1.171     schwarze  702:                if (isalpha((unsigned char)p[-1]) &&
                    703:                    isalpha((unsigned char)p[1]))
1.155     kristaps  704:                        *p = ASCII_HYPH;
                    705:                p++;
1.94      kristaps  706:        }
                    707:
1.178     schwarze  708:        /* Spring the input line trap. */
                    709:        if (1 == roffit_lines) {
1.202     schwarze  710:                isz = mandoc_asprintf(&p, "%s\n.%s", *bufp, roffit_macro);
1.178     schwarze  711:                free(*bufp);
                    712:                *bufp = p;
                    713:                *szp = isz + 1;
                    714:                *offs = 0;
                    715:                free(roffit_macro);
                    716:                roffit_lines = 0;
                    717:                return(ROFF_REPARSE);
                    718:        } else if (1 < roffit_lines)
                    719:                --roffit_lines;
1.154     kristaps  720:        return(ROFF_CONT);
1.94      kristaps  721: }
                    722:
1.67      kristaps  723: enum rofferr
1.207     schwarze  724: roff_parseln(struct roff *r, int ln, char **bufp,
1.90      kristaps  725:                size_t *szp, int pos, int *offs)
1.67      kristaps  726: {
                    727:        enum rofft       t;
1.109     kristaps  728:        enum rofferr     e;
1.130     kristaps  729:        int              ppos, ctl;
1.79      kristaps  730:
1.230     schwarze  731:        /* Handle in-line equation delimiters. */
                    732:
1.236   ! schwarze  733:        if (r->tbl == NULL &&
        !           734:            r->last_eqn != NULL && r->last_eqn->delim &&
1.230     schwarze  735:            (r->eqn == NULL || r->eqn_inline)) {
                    736:                e = roff_eqndelim(r, bufp, szp, pos);
                    737:                if (e == ROFF_REPARSE)
                    738:                        return(e);
                    739:                assert(e == ROFF_CONT);
                    740:        }
                    741:
                    742:        /* Expand some escape sequences. */
1.94      kristaps  743:
1.172     schwarze  744:        e = roff_res(r, bufp, szp, ln, pos);
                    745:        if (ROFF_IGN == e)
                    746:                return(e);
                    747:        assert(ROFF_CONT == e);
1.94      kristaps  748:
1.130     kristaps  749:        ppos = pos;
1.174     kristaps  750:        ctl = roff_getcontrol(r, *bufp, &pos);
1.130     kristaps  751:
1.94      kristaps  752:        /*
1.79      kristaps  753:         * First, if a scope is open and we're not a macro, pass the
                    754:         * text through the macro's filter.  If a scope isn't open and
                    755:         * we're not a macro, just let it through.
1.125     kristaps  756:         * Finally, if there's an equation scope open, divert it into it
                    757:         * no matter our state.
1.79      kristaps  758:         */
1.74      kristaps  759:
1.130     kristaps  760:        if (r->last && ! ctl) {
1.78      kristaps  761:                t = r->last->tok;
                    762:                assert(roffs[t].text);
1.207     schwarze  763:                e = (*roffs[t].text)(r, t, bufp, szp, ln, pos, pos, offs);
1.109     kristaps  764:                assert(ROFF_IGN == e || ROFF_CONT == e);
1.125     kristaps  765:                if (ROFF_CONT != e)
                    766:                        return(e);
1.182     schwarze  767:        }
                    768:        if (r->eqn)
                    769:                return(eqn_read(&r->eqn, ln, *bufp, ppos, offs));
                    770:        if ( ! ctl) {
1.125     kristaps  771:                if (r->tbl)
1.130     kristaps  772:                        return(tbl_read(r->tbl, ln, *bufp, pos));
1.178     schwarze  773:                return(roff_parsetext(bufp, szp, pos, offs));
1.182     schwarze  774:        }
1.228     schwarze  775:
                    776:        /* Skip empty request lines. */
                    777:
                    778:        if ((*bufp)[pos] == '"') {
                    779:                mandoc_msg(MANDOCERR_COMMENT_BAD, r->parse,
                    780:                    ln, pos, NULL);
                    781:                return(ROFF_IGN);
                    782:        } else if ((*bufp)[pos] == '\0')
                    783:                return(ROFF_IGN);
1.67      kristaps  784:
1.79      kristaps  785:        /*
                    786:         * If a scope is open, go to the child handler for that macro,
                    787:         * as it may want to preprocess before doing anything with it.
1.125     kristaps  788:         * Don't do so if an equation is open.
1.79      kristaps  789:         */
1.78      kristaps  790:
1.79      kristaps  791:        if (r->last) {
                    792:                t = r->last->tok;
                    793:                assert(roffs[t].sub);
1.207     schwarze  794:                return((*roffs[t].sub)(r, t, bufp, szp,
                    795:                    ln, ppos, pos, offs));
1.79      kristaps  796:        }
1.78      kristaps  797:
1.79      kristaps  798:        /*
                    799:         * Lastly, as we've no scope open, try to look up and execute
                    800:         * the new macro.  If no macro is found, simply return and let
                    801:         * the compilers handle it.
                    802:         */
1.67      kristaps  803:
1.214     schwarze  804:        if (ROFF_MAX == (t = roff_parse(r, *bufp, &pos, ln, ppos)))
1.79      kristaps  805:                return(ROFF_CONT);
1.67      kristaps  806:
1.75      kristaps  807:        assert(roffs[t].proc);
1.207     schwarze  808:        return((*roffs[t].proc)(r, t, bufp, szp, ln, ppos, pos, offs));
1.74      kristaps  809: }
                    810:
1.117     kristaps  811: void
1.74      kristaps  812: roff_endparse(struct roff *r)
                    813: {
                    814:
1.110     kristaps  815:        if (r->last)
1.221     schwarze  816:                mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
                    817:                    r->last->line, r->last->col,
                    818:                    roffs[r->last->tok].name);
1.117     kristaps  819:
1.125     kristaps  820:        if (r->eqn) {
1.221     schwarze  821:                mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
                    822:                    r->eqn->eqn.ln, r->eqn->eqn.pos, "EQ");
1.151     kristaps  823:                eqn_end(&r->eqn);
1.125     kristaps  824:        }
                    825:
1.117     kristaps  826:        if (r->tbl) {
1.221     schwarze  827:                mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
                    828:                    r->tbl->line, r->tbl->pos, "TS");
1.151     kristaps  829:                tbl_end(&r->tbl);
1.117     kristaps  830:        }
1.67      kristaps  831: }
                    832:
                    833: /*
                    834:  * Parse a roff node's type from the input buffer.  This must be in the
                    835:  * form of ".foo xxx" in the usual way.
                    836:  */
                    837: static enum rofft
1.214     schwarze  838: roff_parse(struct roff *r, char *buf, int *pos, int ln, int ppos)
1.67      kristaps  839: {
1.214     schwarze  840:        char            *cp;
1.106     kristaps  841:        const char      *mac;
                    842:        size_t           maclen;
1.67      kristaps  843:        enum rofft       t;
                    844:
1.214     schwarze  845:        cp = buf + *pos;
                    846:
                    847:        if ('\0' == *cp || '"' == *cp || '\t' == *cp || ' ' == *cp)
1.67      kristaps  848:                return(ROFF_MAX);
                    849:
1.214     schwarze  850:        mac = cp;
                    851:        maclen = roff_getname(r, &cp, ln, ppos);
1.67      kristaps  852:
1.106     kristaps  853:        t = (r->current_string = roff_getstrn(r, mac, maclen))
1.155     kristaps  854:            ? ROFF_USERDEF : roffhash_find(mac, maclen);
1.67      kristaps  855:
1.214     schwarze  856:        if (ROFF_MAX != t)
                    857:                *pos = cp - buf;
1.67      kristaps  858:
                    859:        return(t);
                    860: }
                    861:
                    862: static enum rofferr
1.76      kristaps  863: roff_cblock(ROFF_ARGS)
1.67      kristaps  864: {
                    865:
1.79      kristaps  866:        /*
                    867:         * A block-close `..' should only be invoked as a child of an
                    868:         * ignore macro, otherwise raise a warning and just ignore it.
                    869:         */
                    870:
1.76      kristaps  871:        if (NULL == r->last) {
1.221     schwarze  872:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                    873:                    ln, ppos, "..");
1.76      kristaps  874:                return(ROFF_IGN);
                    875:        }
1.67      kristaps  876:
1.81      kristaps  877:        switch (r->last->tok) {
1.207     schwarze  878:        case ROFF_am:
1.220     schwarze  879:                /* ROFF_am1 is remapped to ROFF_am in roff_block(). */
1.81      kristaps  880:                /* FALLTHROUGH */
1.207     schwarze  881:        case ROFF_ami:
1.81      kristaps  882:                /* FALLTHROUGH */
1.207     schwarze  883:        case ROFF_de:
1.108     schwarze  884:                /* ROFF_de1 is remapped to ROFF_de in roff_block(). */
1.81      kristaps  885:                /* FALLTHROUGH */
1.207     schwarze  886:        case ROFF_dei:
1.81      kristaps  887:                /* FALLTHROUGH */
1.207     schwarze  888:        case ROFF_ig:
1.81      kristaps  889:                break;
                    890:        default:
1.221     schwarze  891:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                    892:                    ln, ppos, "..");
1.67      kristaps  893:                return(ROFF_IGN);
1.76      kristaps  894:        }
1.67      kristaps  895:
1.76      kristaps  896:        if ((*bufp)[pos])
1.217     schwarze  897:                mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
                    898:                    ".. %s", *bufp + pos);
1.71      kristaps  899:
                    900:        roffnode_pop(r);
1.76      kristaps  901:        roffnode_cleanscope(r);
                    902:        return(ROFF_IGN);
1.71      kristaps  903:
1.67      kristaps  904: }
                    905:
1.76      kristaps  906: static void
                    907: roffnode_cleanscope(struct roff *r)
1.67      kristaps  908: {
                    909:
1.76      kristaps  910:        while (r->last) {
1.173     schwarze  911:                if (--r->last->endspan != 0)
1.76      kristaps  912:                        break;
                    913:                roffnode_pop(r);
                    914:        }
1.67      kristaps  915: }
                    916:
1.195     schwarze  917: static void
                    918: roff_ccond(struct roff *r, int ln, int ppos)
1.74      kristaps  919: {
                    920:
1.76      kristaps  921:        if (NULL == r->last) {
1.221     schwarze  922:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                    923:                    ln, ppos, "\\}");
1.195     schwarze  924:                return;
1.76      kristaps  925:        }
                    926:
1.82      kristaps  927:        switch (r->last->tok) {
1.207     schwarze  928:        case ROFF_el:
1.82      kristaps  929:                /* FALLTHROUGH */
1.207     schwarze  930:        case ROFF_ie:
1.82      kristaps  931:                /* FALLTHROUGH */
1.207     schwarze  932:        case ROFF_if:
1.82      kristaps  933:                break;
                    934:        default:
1.221     schwarze  935:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                    936:                    ln, ppos, "\\}");
1.195     schwarze  937:                return;
1.75      kristaps  938:        }
                    939:
1.76      kristaps  940:        if (r->last->endspan > -1) {
1.221     schwarze  941:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                    942:                    ln, ppos, "\\}");
1.195     schwarze  943:                return;
1.76      kristaps  944:        }
                    945:
1.75      kristaps  946:        roffnode_pop(r);
1.76      kristaps  947:        roffnode_cleanscope(r);
1.195     schwarze  948:        return;
1.76      kristaps  949: }
                    950:
                    951: static enum rofferr
1.80      kristaps  952: roff_block(ROFF_ARGS)
1.76      kristaps  953: {
1.220     schwarze  954:        const char      *name;
                    955:        char            *iname, *cp;
1.213     schwarze  956:        size_t           namesz;
1.106     kristaps  957:
1.220     schwarze  958:        /* Ignore groff compatibility mode for now. */
1.76      kristaps  959:
1.220     schwarze  960:        if (ROFF_de1 == tok)
                    961:                tok = ROFF_de;
                    962:        else if (ROFF_am1 == tok)
                    963:                tok = ROFF_am;
                    964:
                    965:        /* Parse the macro name argument. */
                    966:
                    967:        cp = *bufp + pos;
                    968:        if (ROFF_ig == tok) {
                    969:                iname = NULL;
                    970:                namesz = 0;
                    971:        } else {
                    972:                iname = cp;
                    973:                namesz = roff_getname(r, &cp, ln, ppos);
                    974:                iname[namesz] = '\0';
                    975:        }
1.107     kristaps  976:
1.220     schwarze  977:        /* Resolve the macro name argument if it is indirect. */
1.107     kristaps  978:
1.220     schwarze  979:        if (namesz && (ROFF_dei == tok || ROFF_ami == tok)) {
                    980:                if (NULL == (name = roff_getstrn(r, iname, namesz))) {
                    981:                        mandoc_vmsg(MANDOCERR_STR_UNDEF,
                    982:                            r->parse, ln, (int)(iname - *bufp),
                    983:                            "%.*s", (int)namesz, iname);
                    984:                        namesz = 0;
                    985:                } else
                    986:                        namesz = strlen(name);
                    987:        } else
                    988:                name = iname;
1.107     kristaps  989:
1.220     schwarze  990:        if (0 == namesz && ROFF_ig != tok) {
                    991:                mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse,
                    992:                    ln, ppos, roffs[tok].name);
                    993:                return(ROFF_IGN);
                    994:        }
1.80      kristaps  995:
1.106     kristaps  996:        roffnode_push(r, tok, name, ln, ppos);
                    997:
                    998:        /*
                    999:         * At the beginning of a `de' macro, clear the existing string
                   1000:         * with the same name, if there is one.  New content will be
1.193     schwarze 1001:         * appended from roff_block_text() in multiline mode.
1.106     kristaps 1002:         */
1.107     kristaps 1003:
1.220     schwarze 1004:        if (ROFF_de == tok || ROFF_dei == tok)
1.213     schwarze 1005:                roff_setstrn(&r->strtab, name, namesz, "", 0, 0);
1.76      kristaps 1006:
1.213     schwarze 1007:        if ('\0' == *cp)
1.78      kristaps 1008:                return(ROFF_IGN);
                   1009:
1.220     schwarze 1010:        /* Get the custom end marker. */
1.107     kristaps 1011:
1.220     schwarze 1012:        iname = cp;
1.213     schwarze 1013:        namesz = roff_getname(r, &cp, ln, ppos);
1.220     schwarze 1014:
                   1015:        /* Resolve the end marker if it is indirect. */
                   1016:
                   1017:        if (namesz && (ROFF_dei == tok || ROFF_ami == tok)) {
                   1018:                if (NULL == (name = roff_getstrn(r, iname, namesz))) {
                   1019:                        mandoc_vmsg(MANDOCERR_STR_UNDEF,
                   1020:                            r->parse, ln, (int)(iname - *bufp),
                   1021:                            "%.*s", (int)namesz, iname);
                   1022:                        namesz = 0;
                   1023:                } else
                   1024:                        namesz = strlen(name);
                   1025:        } else
                   1026:                name = iname;
                   1027:
1.213     schwarze 1028:        if (namesz)
                   1029:                r->last->end = mandoc_strndup(name, namesz);
1.78      kristaps 1030:
1.213     schwarze 1031:        if ('\0' != *cp)
1.217     schwarze 1032:                mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
                   1033:                    ln, pos, ".%s ... %s", roffs[tok].name, cp);
1.74      kristaps 1034:
1.78      kristaps 1035:        return(ROFF_IGN);
                   1036: }
                   1037:
                   1038: static enum rofferr
1.80      kristaps 1039: roff_block_sub(ROFF_ARGS)
1.79      kristaps 1040: {
                   1041:        enum rofft      t;
                   1042:        int             i, j;
                   1043:
                   1044:        /*
                   1045:         * First check whether a custom macro exists at this level.  If
                   1046:         * it does, then check against it.  This is some of groff's
                   1047:         * stranger behaviours.  If we encountered a custom end-scope
                   1048:         * tag and that tag also happens to be a "real" macro, then we
                   1049:         * need to try interpreting it again as a real macro.  If it's
                   1050:         * not, then return ignore.  Else continue.
                   1051:         */
                   1052:
                   1053:        if (r->last->end) {
1.130     kristaps 1054:                for (i = pos, j = 0; r->last->end[j]; j++, i++)
1.79      kristaps 1055:                        if ((*bufp)[i] != r->last->end[j])
                   1056:                                break;
                   1057:
1.207     schwarze 1058:                if ('\0' == r->last->end[j] &&
                   1059:                    ('\0' == (*bufp)[i] ||
                   1060:                     ' '  == (*bufp)[i] ||
                   1061:                     '\t' == (*bufp)[i])) {
1.79      kristaps 1062:                        roffnode_pop(r);
                   1063:                        roffnode_cleanscope(r);
                   1064:
1.130     kristaps 1065:                        while (' ' == (*bufp)[i] || '\t' == (*bufp)[i])
                   1066:                                i++;
                   1067:
                   1068:                        pos = i;
1.214     schwarze 1069:                        if (ROFF_MAX != roff_parse(r, *bufp, &pos, ln, ppos))
1.79      kristaps 1070:                                return(ROFF_RERUN);
                   1071:                        return(ROFF_IGN);
                   1072:                }
                   1073:        }
                   1074:
                   1075:        /*
                   1076:         * If we have no custom end-query or lookup failed, then try
                   1077:         * pulling it out of the hashtable.
                   1078:         */
                   1079:
1.214     schwarze 1080:        t = roff_parse(r, *bufp, &pos, ln, ppos);
1.79      kristaps 1081:
1.106     kristaps 1082:        if (ROFF_cblock != t) {
1.220     schwarze 1083:                if (ROFF_ig != tok)
1.193     schwarze 1084:                        roff_setstr(r, r->last->name, *bufp + ppos, 2);
1.79      kristaps 1085:                return(ROFF_IGN);
1.106     kristaps 1086:        }
1.79      kristaps 1087:
                   1088:        assert(roffs[t].proc);
1.207     schwarze 1089:        return((*roffs[t].proc)(r, t, bufp, szp, ln, ppos, pos, offs));
1.79      kristaps 1090: }
                   1091:
                   1092: static enum rofferr
1.80      kristaps 1093: roff_block_text(ROFF_ARGS)
1.78      kristaps 1094: {
                   1095:
1.220     schwarze 1096:        if (ROFF_ig != tok)
1.193     schwarze 1097:                roff_setstr(r, r->last->name, *bufp + pos, 2);
1.106     kristaps 1098:
1.78      kristaps 1099:        return(ROFF_IGN);
                   1100: }
                   1101:
                   1102: static enum rofferr
1.82      kristaps 1103: roff_cond_sub(ROFF_ARGS)
                   1104: {
                   1105:        enum rofft       t;
1.139     kristaps 1106:        char            *ep;
1.198     schwarze 1107:        int              rr;
1.82      kristaps 1108:
                   1109:        rr = r->last->rule;
1.139     kristaps 1110:        roffnode_cleanscope(r);
1.214     schwarze 1111:        t = roff_parse(r, *bufp, &pos, ln, ppos);
1.82      kristaps 1112:
1.139     kristaps 1113:        /*
1.177     schwarze 1114:         * Fully handle known macros when they are structurally
                   1115:         * required or when the conditional evaluated to true.
1.87      kristaps 1116:         */
                   1117:
1.177     schwarze 1118:        if ((ROFF_MAX != t) &&
1.198     schwarze 1119:            (rr || ROFFMAC_STRUCT & roffs[t].flags)) {
1.177     schwarze 1120:                assert(roffs[t].proc);
                   1121:                return((*roffs[t].proc)(r, t, bufp, szp,
1.207     schwarze 1122:                    ln, ppos, pos, offs));
1.177     schwarze 1123:        }
1.144     kristaps 1124:
1.196     schwarze 1125:        /*
                   1126:         * If `\}' occurs on a macro line without a preceding macro,
                   1127:         * drop the line completely.
                   1128:         */
                   1129:
                   1130:        ep = *bufp + pos;
                   1131:        if ('\\' == ep[0] && '}' == ep[1])
1.198     schwarze 1132:                rr = 0;
1.196     schwarze 1133:
1.177     schwarze 1134:        /* Always check for the closing delimiter `\}'. */
1.144     kristaps 1135:
1.177     schwarze 1136:        while (NULL != (ep = strchr(ep, '\\'))) {
1.197     schwarze 1137:                if ('}' == *(++ep)) {
                   1138:                        *ep = '&';
                   1139:                        roff_ccond(r, ln, ep - *bufp - 1);
                   1140:                }
                   1141:                ++ep;
1.177     schwarze 1142:        }
1.198     schwarze 1143:        return(rr ? ROFF_CONT : ROFF_IGN);
1.82      kristaps 1144: }
                   1145:
                   1146: static enum rofferr
                   1147: roff_cond_text(ROFF_ARGS)
1.78      kristaps 1148: {
1.140     kristaps 1149:        char            *ep;
1.198     schwarze 1150:        int              rr;
1.82      kristaps 1151:
                   1152:        rr = r->last->rule;
1.140     kristaps 1153:        roffnode_cleanscope(r);
1.82      kristaps 1154:
1.197     schwarze 1155:        ep = *bufp + pos;
                   1156:        while (NULL != (ep = strchr(ep, '\\'))) {
                   1157:                if ('}' == *(++ep)) {
                   1158:                        *ep = '&';
                   1159:                        roff_ccond(r, ln, ep - *bufp - 1);
                   1160:                }
                   1161:                ++ep;
1.78      kristaps 1162:        }
1.198     schwarze 1163:        return(rr ? ROFF_CONT : ROFF_IGN);
1.74      kristaps 1164: }
                   1165:
1.204     schwarze 1166: /*
                   1167:  * Parse a single signed integer number.  Stop at the first non-digit.
                   1168:  * If there is at least one digit, return success and advance the
                   1169:  * parse point, else return failure and let the parse point unchanged.
                   1170:  * Ignore overflows, treat them just like the C language.
                   1171:  */
1.184     schwarze 1172: static int
                   1173: roff_getnum(const char *v, int *pos, int *res)
                   1174: {
1.206     schwarze 1175:        int      myres, n, p;
                   1176:
                   1177:        if (NULL == res)
                   1178:                res = &myres;
1.184     schwarze 1179:
                   1180:        p = *pos;
                   1181:        n = v[p] == '-';
                   1182:        if (n)
                   1183:                p++;
                   1184:
                   1185:        for (*res = 0; isdigit((unsigned char)v[p]); p++)
1.204     schwarze 1186:                *res = 10 * *res + v[p] - '0';
1.184     schwarze 1187:        if (p == *pos + n)
                   1188:                return 0;
                   1189:
                   1190:        if (n)
                   1191:                *res = -*res;
                   1192:
                   1193:        *pos = p;
                   1194:        return 1;
                   1195: }
                   1196:
1.198     schwarze 1197: /*
                   1198:  * Evaluate a string comparison condition.
                   1199:  * The first character is the delimiter.
                   1200:  * Succeed if the string up to its second occurrence
                   1201:  * matches the string up to its third occurence.
                   1202:  * Advance the cursor after the third occurrence
                   1203:  * or lacking that, to the end of the line.
                   1204:  */
                   1205: static int
                   1206: roff_evalstrcond(const char *v, int *pos)
                   1207: {
                   1208:        const char      *s1, *s2, *s3;
                   1209:        int              match;
                   1210:
                   1211:        match = 0;
                   1212:        s1 = v + *pos;          /* initial delimiter */
                   1213:        s2 = s1 + 1;            /* for scanning the first string */
                   1214:        s3 = strchr(s2, *s1);   /* for scanning the second string */
                   1215:
                   1216:        if (NULL == s3)         /* found no middle delimiter */
                   1217:                goto out;
                   1218:
                   1219:        while ('\0' != *++s3) {
                   1220:                if (*s2 != *s3) {  /* mismatch */
                   1221:                        s3 = strchr(s3, *s1);
                   1222:                        break;
                   1223:                }
                   1224:                if (*s3 == *s1) {  /* found the final delimiter */
                   1225:                        match = 1;
                   1226:                        break;
                   1227:                }
                   1228:                s2++;
                   1229:        }
                   1230:
                   1231: out:
                   1232:        if (NULL == s3)
                   1233:                s3 = strchr(s2, '\0');
                   1234:        else
                   1235:                s3++;
                   1236:        *pos = s3 - v;
                   1237:        return(match);
                   1238: }
                   1239:
1.204     schwarze 1240: /*
                   1241:  * Evaluate an optionally negated single character, numerical,
                   1242:  * or string condition.
                   1243:  */
1.198     schwarze 1244: static int
1.234     kristaps 1245: roff_evalcond(struct roff *r, int ln, const char *v, int *pos)
1.88      kristaps 1246: {
1.204     schwarze 1247:        int      wanttrue, number;
1.88      kristaps 1248:
1.198     schwarze 1249:        if ('!' == v[*pos]) {
                   1250:                wanttrue = 0;
                   1251:                (*pos)++;
                   1252:        } else
                   1253:                wanttrue = 1;
                   1254:
1.88      kristaps 1255:        switch (v[*pos]) {
1.207     schwarze 1256:        case 'n':
1.198     schwarze 1257:                /* FALLTHROUGH */
1.207     schwarze 1258:        case 'o':
1.88      kristaps 1259:                (*pos)++;
1.198     schwarze 1260:                return(wanttrue);
1.207     schwarze 1261:        case 'c':
1.198     schwarze 1262:                /* FALLTHROUGH */
1.207     schwarze 1263:        case 'd':
1.198     schwarze 1264:                /* FALLTHROUGH */
1.207     schwarze 1265:        case 'e':
1.88      kristaps 1266:                /* FALLTHROUGH */
1.207     schwarze 1267:        case 'r':
1.88      kristaps 1268:                /* FALLTHROUGH */
1.207     schwarze 1269:        case 't':
1.88      kristaps 1270:                (*pos)++;
1.198     schwarze 1271:                return(!wanttrue);
1.88      kristaps 1272:        default:
                   1273:                break;
                   1274:        }
                   1275:
1.234     kristaps 1276:        if (roff_evalnum(r, ln, v, pos, &number, 0))
1.204     schwarze 1277:                return((number > 0) == wanttrue);
                   1278:        else
1.198     schwarze 1279:                return(roff_evalstrcond(v, pos) == wanttrue);
1.88      kristaps 1280: }
                   1281:
1.74      kristaps 1282: static enum rofferr
1.103     kristaps 1283: roff_line_ignore(ROFF_ARGS)
1.89      kristaps 1284: {
1.123     schwarze 1285:
1.89      kristaps 1286:        return(ROFF_IGN);
                   1287: }
                   1288:
1.104     kristaps 1289: static enum rofferr
1.82      kristaps 1290: roff_cond(ROFF_ARGS)
1.74      kristaps 1291: {
1.173     schwarze 1292:
                   1293:        roffnode_push(r, tok, NULL, ln, ppos);
1.74      kristaps 1294:
1.207     schwarze 1295:        /*
1.134     kristaps 1296:         * An `.el' has no conditional body: it will consume the value
                   1297:         * of the current rstack entry set in prior `ie' calls or
1.207     schwarze 1298:         * defaults to DENY.
1.134     kristaps 1299:         *
                   1300:         * If we're not an `el', however, then evaluate the conditional.
                   1301:         */
1.133     kristaps 1302:
1.173     schwarze 1303:        r->last->rule = ROFF_el == tok ?
1.207     schwarze 1304:            (r->rstackpos < 0 ? 0 : r->rstack[r->rstackpos--]) :
1.234     kristaps 1305:            roff_evalcond(r, ln, *bufp, &pos);
1.77      kristaps 1306:
1.134     kristaps 1307:        /*
                   1308:         * An if-else will put the NEGATION of the current evaluated
                   1309:         * conditional into the stack of rules.
                   1310:         */
                   1311:
1.84      schwarze 1312:        if (ROFF_ie == tok) {
1.223     schwarze 1313:                if (r->rstackpos + 1 == r->rstacksz) {
                   1314:                        r->rstacksz += 16;
                   1315:                        r->rstack = mandoc_reallocarray(r->rstack,
                   1316:                            r->rstacksz, sizeof(int));
1.134     kristaps 1317:                }
1.198     schwarze 1318:                r->rstack[++r->rstackpos] = !r->last->rule;
1.82      kristaps 1319:        }
1.88      kristaps 1320:
                   1321:        /* If the parent has false as its rule, then so do we. */
                   1322:
1.198     schwarze 1323:        if (r->last->parent && !r->last->parent->rule)
                   1324:                r->last->rule = 0;
1.88      kristaps 1325:
                   1326:        /*
1.173     schwarze 1327:         * Determine scope.
                   1328:         * If there is nothing on the line after the conditional,
                   1329:         * not even whitespace, use next-line scope.
1.88      kristaps 1330:         */
1.74      kristaps 1331:
1.173     schwarze 1332:        if ('\0' == (*bufp)[pos]) {
                   1333:                r->last->endspan = 2;
                   1334:                goto out;
                   1335:        }
                   1336:
                   1337:        while (' ' == (*bufp)[pos])
                   1338:                pos++;
                   1339:
                   1340:        /* An opening brace requests multiline scope. */
1.75      kristaps 1341:
                   1342:        if ('\\' == (*bufp)[pos] && '{' == (*bufp)[pos + 1]) {
                   1343:                r->last->endspan = -1;
                   1344:                pos += 2;
1.173     schwarze 1345:                goto out;
1.207     schwarze 1346:        }
1.74      kristaps 1347:
1.77      kristaps 1348:        /*
1.173     schwarze 1349:         * Anything else following the conditional causes
                   1350:         * single-line scope.  Warn if the scope contains
                   1351:         * nothing but trailing whitespace.
1.77      kristaps 1352:         */
                   1353:
1.75      kristaps 1354:        if ('\0' == (*bufp)[pos])
1.216     schwarze 1355:                mandoc_msg(MANDOCERR_COND_EMPTY, r->parse,
                   1356:                    ln, ppos, roffs[tok].name);
1.77      kristaps 1357:
1.173     schwarze 1358:        r->last->endspan = 1;
1.74      kristaps 1359:
1.173     schwarze 1360: out:
1.75      kristaps 1361:        *offs = pos;
                   1362:        return(ROFF_RERUN);
1.83      schwarze 1363: }
                   1364:
                   1365: static enum rofferr
1.92      schwarze 1366: roff_ds(ROFF_ARGS)
                   1367: {
1.212     schwarze 1368:        char            *string;
                   1369:        const char      *name;
                   1370:        size_t           namesz;
1.96      kristaps 1371:
                   1372:        /*
1.212     schwarze 1373:         * The first word is the name of the string.
                   1374:         * If it is empty or terminated by an escape sequence,
                   1375:         * abort the `ds' request without defining anything.
1.96      kristaps 1376:         */
1.92      schwarze 1377:
1.212     schwarze 1378:        name = string = *bufp + pos;
1.92      schwarze 1379:        if ('\0' == *name)
                   1380:                return(ROFF_IGN);
                   1381:
1.212     schwarze 1382:        namesz = roff_getname(r, &string, ln, pos);
                   1383:        if ('\\' == name[namesz])
                   1384:                return(ROFF_IGN);
                   1385:
                   1386:        /* Read past the initial double-quote, if any. */
1.121     schwarze 1387:        if ('"' == *string)
1.92      schwarze 1388:                string++;
                   1389:
1.96      kristaps 1390:        /* The rest is the value. */
1.212     schwarze 1391:        roff_setstrn(&r->strtab, name, namesz, string, strlen(string),
                   1392:            ROFF_as == tok);
1.92      schwarze 1393:        return(ROFF_IGN);
                   1394: }
                   1395:
1.204     schwarze 1396: /*
                   1397:  * Parse a single operator, one or two characters long.
                   1398:  * If the operator is recognized, return success and advance the
                   1399:  * parse point, else return failure and let the parse point unchanged.
                   1400:  */
                   1401: static int
                   1402: roff_getop(const char *v, int *pos, char *res)
                   1403: {
                   1404:
                   1405:        *res = v[*pos];
                   1406:
                   1407:        switch (*res) {
1.207     schwarze 1408:        case '+':
1.204     schwarze 1409:                /* FALLTHROUGH */
1.207     schwarze 1410:        case '-':
1.204     schwarze 1411:                /* FALLTHROUGH */
1.207     schwarze 1412:        case '*':
1.204     schwarze 1413:                /* FALLTHROUGH */
1.207     schwarze 1414:        case '/':
1.204     schwarze 1415:                /* FALLTHROUGH */
1.207     schwarze 1416:        case '%':
1.204     schwarze 1417:                /* FALLTHROUGH */
1.207     schwarze 1418:        case '&':
1.204     schwarze 1419:                /* FALLTHROUGH */
1.207     schwarze 1420:        case ':':
1.204     schwarze 1421:                break;
                   1422:        case '<':
                   1423:                switch (v[*pos + 1]) {
1.207     schwarze 1424:                case '=':
1.204     schwarze 1425:                        *res = 'l';
                   1426:                        (*pos)++;
                   1427:                        break;
1.207     schwarze 1428:                case '>':
1.204     schwarze 1429:                        *res = '!';
                   1430:                        (*pos)++;
                   1431:                        break;
1.207     schwarze 1432:                case '?':
1.204     schwarze 1433:                        *res = 'i';
                   1434:                        (*pos)++;
                   1435:                        break;
                   1436:                default:
                   1437:                        break;
                   1438:                }
                   1439:                break;
                   1440:        case '>':
                   1441:                switch (v[*pos + 1]) {
1.207     schwarze 1442:                case '=':
1.204     schwarze 1443:                        *res = 'g';
                   1444:                        (*pos)++;
                   1445:                        break;
1.207     schwarze 1446:                case '?':
1.204     schwarze 1447:                        *res = 'a';
                   1448:                        (*pos)++;
                   1449:                        break;
                   1450:                default:
                   1451:                        break;
                   1452:                }
                   1453:                break;
                   1454:        case '=':
                   1455:                if ('=' == v[*pos + 1])
                   1456:                        (*pos)++;
                   1457:                break;
                   1458:        default:
                   1459:                return(0);
                   1460:        }
                   1461:        (*pos)++;
                   1462:
                   1463:        return(*res);
                   1464: }
                   1465:
                   1466: /*
                   1467:  * Evaluate either a parenthesized numeric expression
                   1468:  * or a single signed integer number.
                   1469:  */
                   1470: static int
1.235     schwarze 1471: roff_evalpar(struct roff *r, int ln,
1.234     kristaps 1472:        const char *v, int *pos, int *res)
1.204     schwarze 1473: {
                   1474:
                   1475:        if ('(' != v[*pos])
                   1476:                return(roff_getnum(v, pos, res));
                   1477:
                   1478:        (*pos)++;
1.234     kristaps 1479:        if ( ! roff_evalnum(r, ln, v, pos, res, 1))
1.204     schwarze 1480:                return(0);
                   1481:
1.206     schwarze 1482:        /*
                   1483:         * Omission of the closing parenthesis
                   1484:         * is an error in validation mode,
                   1485:         * but ignored in evaluation mode.
                   1486:         */
                   1487:
1.204     schwarze 1488:        if (')' == v[*pos])
                   1489:                (*pos)++;
1.206     schwarze 1490:        else if (NULL == res)
                   1491:                return(0);
1.204     schwarze 1492:
                   1493:        return(1);
                   1494: }
                   1495:
                   1496: /*
                   1497:  * Evaluate a complete numeric expression.
                   1498:  * Proceed left to right, there is no concept of precedence.
                   1499:  */
                   1500: static int
1.235     schwarze 1501: roff_evalnum(struct roff *r, int ln, const char *v,
1.234     kristaps 1502:        int *pos, int *res, int skipwhite)
1.204     schwarze 1503: {
                   1504:        int              mypos, operand2;
                   1505:        char             operator;
                   1506:
                   1507:        if (NULL == pos) {
                   1508:                mypos = 0;
                   1509:                pos = &mypos;
                   1510:        }
                   1511:
                   1512:        if (skipwhite)
                   1513:                while (isspace((unsigned char)v[*pos]))
                   1514:                        (*pos)++;
                   1515:
1.234     kristaps 1516:        if ( ! roff_evalpar(r, ln, v, pos, res))
1.204     schwarze 1517:                return(0);
                   1518:
                   1519:        while (1) {
                   1520:                if (skipwhite)
                   1521:                        while (isspace((unsigned char)v[*pos]))
                   1522:                                (*pos)++;
                   1523:
                   1524:                if ( ! roff_getop(v, pos, &operator))
                   1525:                        break;
                   1526:
                   1527:                if (skipwhite)
                   1528:                        while (isspace((unsigned char)v[*pos]))
                   1529:                                (*pos)++;
                   1530:
1.234     kristaps 1531:                if ( ! roff_evalpar(r, ln, v, pos, &operand2))
1.204     schwarze 1532:                        return(0);
                   1533:
                   1534:                if (skipwhite)
                   1535:                        while (isspace((unsigned char)v[*pos]))
                   1536:                                (*pos)++;
1.206     schwarze 1537:
                   1538:                if (NULL == res)
                   1539:                        continue;
1.204     schwarze 1540:
                   1541:                switch (operator) {
1.207     schwarze 1542:                case '+':
1.204     schwarze 1543:                        *res += operand2;
                   1544:                        break;
1.207     schwarze 1545:                case '-':
1.204     schwarze 1546:                        *res -= operand2;
                   1547:                        break;
1.207     schwarze 1548:                case '*':
1.204     schwarze 1549:                        *res *= operand2;
                   1550:                        break;
1.207     schwarze 1551:                case '/':
1.234     kristaps 1552:                        if (0 == operand2) {
1.235     schwarze 1553:                                mandoc_msg(MANDOCERR_DIVZERO,
1.234     kristaps 1554:                                        r->parse, ln, *pos, v);
                   1555:                                *res = 0;
                   1556:                                break;
                   1557:                        }
1.204     schwarze 1558:                        *res /= operand2;
                   1559:                        break;
1.207     schwarze 1560:                case '%':
1.204     schwarze 1561:                        *res %= operand2;
                   1562:                        break;
1.207     schwarze 1563:                case '<':
1.204     schwarze 1564:                        *res = *res < operand2;
                   1565:                        break;
1.207     schwarze 1566:                case '>':
1.204     schwarze 1567:                        *res = *res > operand2;
                   1568:                        break;
1.207     schwarze 1569:                case 'l':
1.204     schwarze 1570:                        *res = *res <= operand2;
                   1571:                        break;
1.207     schwarze 1572:                case 'g':
1.204     schwarze 1573:                        *res = *res >= operand2;
                   1574:                        break;
1.207     schwarze 1575:                case '=':
1.204     schwarze 1576:                        *res = *res == operand2;
                   1577:                        break;
1.207     schwarze 1578:                case '!':
1.204     schwarze 1579:                        *res = *res != operand2;
                   1580:                        break;
1.207     schwarze 1581:                case '&':
1.204     schwarze 1582:                        *res = *res && operand2;
                   1583:                        break;
1.207     schwarze 1584:                case ':':
1.204     schwarze 1585:                        *res = *res || operand2;
                   1586:                        break;
1.207     schwarze 1587:                case 'i':
1.204     schwarze 1588:                        if (operand2 < *res)
                   1589:                                *res = operand2;
                   1590:                        break;
1.207     schwarze 1591:                case 'a':
1.204     schwarze 1592:                        if (operand2 > *res)
                   1593:                                *res = operand2;
                   1594:                        break;
                   1595:                default:
                   1596:                        abort();
                   1597:                }
                   1598:        }
                   1599:        return(1);
                   1600: }
                   1601:
1.180     schwarze 1602: void
1.187     schwarze 1603: roff_setreg(struct roff *r, const char *name, int val, char sign)
1.147     kristaps 1604: {
1.180     schwarze 1605:        struct roffreg  *reg;
                   1606:
                   1607:        /* Search for an existing register with the same name. */
                   1608:        reg = r->regtab;
                   1609:
                   1610:        while (reg && strcmp(name, reg->key.p))
                   1611:                reg = reg->next;
1.147     kristaps 1612:
1.180     schwarze 1613:        if (NULL == reg) {
                   1614:                /* Create a new register. */
                   1615:                reg = mandoc_malloc(sizeof(struct roffreg));
                   1616:                reg->key.p = mandoc_strdup(name);
                   1617:                reg->key.sz = strlen(name);
1.187     schwarze 1618:                reg->val = 0;
1.180     schwarze 1619:                reg->next = r->regtab;
                   1620:                r->regtab = reg;
                   1621:        }
                   1622:
1.187     schwarze 1623:        if ('+' == sign)
                   1624:                reg->val += val;
                   1625:        else if ('-' == sign)
                   1626:                reg->val -= val;
                   1627:        else
                   1628:                reg->val = val;
1.147     kristaps 1629: }
                   1630:
1.192     schwarze 1631: /*
                   1632:  * Handle some predefined read-only number registers.
                   1633:  * For now, return -1 if the requested register is not predefined;
                   1634:  * in case a predefined read-only register having the value -1
                   1635:  * were to turn up, another special value would have to be chosen.
                   1636:  */
                   1637: static int
                   1638: roff_getregro(const char *name)
                   1639: {
                   1640:
                   1641:        switch (*name) {
1.207     schwarze 1642:        case 'A':  /* ASCII approximation mode is always off. */
1.192     schwarze 1643:                return(0);
1.207     schwarze 1644:        case 'g':  /* Groff compatibility mode is always on. */
1.192     schwarze 1645:                return(1);
1.207     schwarze 1646:        case 'H':  /* Fixed horizontal resolution. */
1.192     schwarze 1647:                return (24);
1.207     schwarze 1648:        case 'j':  /* Always adjust left margin only. */
1.192     schwarze 1649:                return(0);
1.207     schwarze 1650:        case 'T':  /* Some output device is always defined. */
1.192     schwarze 1651:                return(1);
1.207     schwarze 1652:        case 'V':  /* Fixed vertical resolution. */
1.192     schwarze 1653:                return (40);
                   1654:        default:
                   1655:                return (-1);
                   1656:        }
                   1657: }
                   1658:
1.181     schwarze 1659: int
1.180     schwarze 1660: roff_getreg(const struct roff *r, const char *name)
1.147     kristaps 1661: {
1.180     schwarze 1662:        struct roffreg  *reg;
1.192     schwarze 1663:        int              val;
                   1664:
                   1665:        if ('.' == name[0] && '\0' != name[1] && '\0' == name[2]) {
                   1666:                val = roff_getregro(name + 1);
                   1667:                if (-1 != val)
                   1668:                        return (val);
                   1669:        }
1.180     schwarze 1670:
                   1671:        for (reg = r->regtab; reg; reg = reg->next)
                   1672:                if (0 == strcmp(name, reg->key.p))
1.181     schwarze 1673:                        return(reg->val);
                   1674:
                   1675:        return(0);
                   1676: }
                   1677:
                   1678: static int
                   1679: roff_getregn(const struct roff *r, const char *name, size_t len)
                   1680: {
                   1681:        struct roffreg  *reg;
1.192     schwarze 1682:        int              val;
                   1683:
                   1684:        if ('.' == name[0] && 2 == len) {
                   1685:                val = roff_getregro(name + 1);
                   1686:                if (-1 != val)
                   1687:                        return (val);
                   1688:        }
1.181     schwarze 1689:
                   1690:        for (reg = r->regtab; reg; reg = reg->next)
                   1691:                if (len == reg->key.sz &&
                   1692:                    0 == strncmp(name, reg->key.p, len))
                   1693:                        return(reg->val);
1.147     kristaps 1694:
1.180     schwarze 1695:        return(0);
1.147     kristaps 1696: }
                   1697:
1.180     schwarze 1698: static void
                   1699: roff_freereg(struct roffreg *reg)
1.147     kristaps 1700: {
1.180     schwarze 1701:        struct roffreg  *old_reg;
1.147     kristaps 1702:
1.180     schwarze 1703:        while (NULL != reg) {
                   1704:                free(reg->key.p);
                   1705:                old_reg = reg;
                   1706:                reg = reg->next;
                   1707:                free(old_reg);
                   1708:        }
1.147     kristaps 1709: }
1.92      schwarze 1710:
                   1711: static enum rofferr
1.89      kristaps 1712: roff_nr(ROFF_ARGS)
1.83      schwarze 1713: {
1.212     schwarze 1714:        char            *key, *val;
                   1715:        size_t           keysz;
1.138     kristaps 1716:        int              iv;
1.187     schwarze 1717:        char             sign;
1.89      kristaps 1718:
1.212     schwarze 1719:        key = val = *bufp + pos;
                   1720:        if ('\0' == *key)
                   1721:                return(ROFF_IGN);
                   1722:
                   1723:        keysz = roff_getname(r, &val, ln, pos);
                   1724:        if ('\\' == key[keysz])
                   1725:                return(ROFF_IGN);
                   1726:        key[keysz] = '\0';
1.89      kristaps 1727:
1.187     schwarze 1728:        sign = *val;
                   1729:        if ('+' == sign || '-' == sign)
                   1730:                val++;
                   1731:
1.234     kristaps 1732:        if (roff_evalnum(r, ln, val, NULL, &iv, 0))
1.204     schwarze 1733:                roff_setreg(r, key, iv, sign);
1.109     kristaps 1734:
1.203     schwarze 1735:        return(ROFF_IGN);
                   1736: }
                   1737:
                   1738: static enum rofferr
                   1739: roff_rr(ROFF_ARGS)
                   1740: {
                   1741:        struct roffreg  *reg, **prev;
1.212     schwarze 1742:        char            *name, *cp;
                   1743:        size_t           namesz;
1.203     schwarze 1744:
1.212     schwarze 1745:        name = cp = *bufp + pos;
                   1746:        if ('\0' == *name)
                   1747:                return(ROFF_IGN);
                   1748:        namesz = roff_getname(r, &cp, ln, pos);
                   1749:        name[namesz] = '\0';
1.203     schwarze 1750:
                   1751:        prev = &r->regtab;
                   1752:        while (1) {
                   1753:                reg = *prev;
                   1754:                if (NULL == reg || !strcmp(name, reg->key.p))
                   1755:                        break;
                   1756:                prev = &reg->next;
                   1757:        }
                   1758:        if (NULL != reg) {
                   1759:                *prev = reg->next;
                   1760:                free(reg->key.p);
                   1761:                free(reg);
                   1762:        }
1.122     schwarze 1763:        return(ROFF_IGN);
                   1764: }
                   1765:
                   1766: static enum rofferr
                   1767: roff_rm(ROFF_ARGS)
                   1768: {
                   1769:        const char       *name;
                   1770:        char             *cp;
1.212     schwarze 1771:        size_t            namesz;
1.122     schwarze 1772:
                   1773:        cp = *bufp + pos;
                   1774:        while ('\0' != *cp) {
1.212     schwarze 1775:                name = cp;
                   1776:                namesz = roff_getname(r, &cp, ln, (int)(cp - *bufp));
                   1777:                roff_setstrn(&r->strtab, name, namesz, NULL, 0, 0);
                   1778:                if ('\\' == name[namesz])
                   1779:                        break;
1.122     schwarze 1780:        }
1.178     schwarze 1781:        return(ROFF_IGN);
                   1782: }
                   1783:
                   1784: static enum rofferr
                   1785: roff_it(ROFF_ARGS)
                   1786: {
                   1787:        char            *cp;
                   1788:        size_t           len;
                   1789:        int              iv;
                   1790:
                   1791:        /* Parse the number of lines. */
                   1792:        cp = *bufp + pos;
                   1793:        len = strcspn(cp, " \t");
                   1794:        cp[len] = '\0';
                   1795:        if ((iv = mandoc_strntoi(cp, len, 10)) <= 0) {
1.222     schwarze 1796:                mandoc_msg(MANDOCERR_IT_NONUM, r->parse,
1.207     schwarze 1797:                    ln, ppos, *bufp + 1);
1.178     schwarze 1798:                return(ROFF_IGN);
                   1799:        }
                   1800:        cp += len + 1;
                   1801:
                   1802:        /* Arm the input line trap. */
                   1803:        roffit_lines = iv;
                   1804:        roffit_macro = mandoc_strdup(cp);
1.109     kristaps 1805:        return(ROFF_IGN);
1.175     schwarze 1806: }
                   1807:
                   1808: static enum rofferr
                   1809: roff_Dd(ROFF_ARGS)
                   1810: {
                   1811:        const char *const       *cp;
                   1812:
1.227     schwarze 1813:        if ((r->options & (MPARSE_MDOC | MPARSE_QUICK)) == 0)
1.175     schwarze 1814:                for (cp = __mdoc_reserved; *cp; cp++)
                   1815:                        roff_setstr(r, *cp, NULL, 0);
                   1816:
1.227     schwarze 1817:        if (r->format == 0)
                   1818:                r->format = MPARSE_MDOC;
                   1819:
1.175     schwarze 1820:        return(ROFF_CONT);
                   1821: }
                   1822:
                   1823: static enum rofferr
                   1824: roff_TH(ROFF_ARGS)
                   1825: {
                   1826:        const char *const       *cp;
                   1827:
1.227     schwarze 1828:        if ((r->options & MPARSE_QUICK) == 0)
1.175     schwarze 1829:                for (cp = __man_reserved; *cp; cp++)
                   1830:                        roff_setstr(r, *cp, NULL, 0);
                   1831:
1.227     schwarze 1832:        if (r->format == 0)
                   1833:                r->format = MPARSE_MAN;
                   1834:
1.175     schwarze 1835:        return(ROFF_CONT);
1.109     kristaps 1836: }
                   1837:
                   1838: static enum rofferr
                   1839: roff_TE(ROFF_ARGS)
                   1840: {
                   1841:
                   1842:        if (NULL == r->tbl)
1.221     schwarze 1843:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1844:                    ln, ppos, "TE");
1.115     kristaps 1845:        else
1.151     kristaps 1846:                tbl_end(&r->tbl);
1.109     kristaps 1847:
1.112     kristaps 1848:        return(ROFF_IGN);
                   1849: }
                   1850:
                   1851: static enum rofferr
                   1852: roff_T_(ROFF_ARGS)
                   1853: {
                   1854:
                   1855:        if (NULL == r->tbl)
1.221     schwarze 1856:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1857:                    ln, ppos, "T&");
1.112     kristaps 1858:        else
1.116     kristaps 1859:                tbl_restart(ppos, ln, r->tbl);
1.112     kristaps 1860:
1.109     kristaps 1861:        return(ROFF_IGN);
                   1862: }
                   1863:
1.230     schwarze 1864: /*
                   1865:  * Handle in-line equation delimiters.
                   1866:  */
                   1867: static enum rofferr
                   1868: roff_eqndelim(struct roff *r, char **bufp, size_t *szp, int pos)
1.151     kristaps 1869: {
1.233     schwarze 1870:        char            *cp1, *cp2;
                   1871:        const char      *bef_pr, *bef_nl, *mac, *aft_nl, *aft_pr;
1.151     kristaps 1872:
1.230     schwarze 1873:        /*
                   1874:         * Outside equations, look for an opening delimiter.
                   1875:         * If we are inside an equation, we already know it is
                   1876:         * in-line, or this function wouldn't have been called;
                   1877:         * so look for a closing delimiter.
                   1878:         */
                   1879:
                   1880:        cp1 = *bufp + pos;
                   1881:        cp2 = strchr(cp1, r->eqn == NULL ?
                   1882:            r->last_eqn->odelim : r->last_eqn->cdelim);
                   1883:        if (cp2 == NULL)
                   1884:                return(ROFF_CONT);
                   1885:
1.233     schwarze 1886:        *cp2++ = '\0';
                   1887:        bef_pr = bef_nl = aft_nl = aft_pr = "";
                   1888:
                   1889:        /* Handle preceding text, protecting whitespace. */
                   1890:
                   1891:        if (**bufp != '\0') {
                   1892:                if (r->eqn == NULL)
                   1893:                        bef_pr = "\\&";
                   1894:                bef_nl = "\n";
                   1895:        }
                   1896:
                   1897:        /*
                   1898:         * Prepare replacing the delimiter with an equation macro
                   1899:         * and drop leading white space from the equation.
                   1900:         */
1.230     schwarze 1901:
1.233     schwarze 1902:        if (r->eqn == NULL) {
                   1903:                while (*cp2 == ' ')
                   1904:                        cp2++;
                   1905:                mac = ".EQ";
                   1906:        } else
                   1907:                mac = ".EN";
                   1908:
                   1909:        /* Handle following text, protecting whitespace. */
                   1910:
                   1911:        if (*cp2 != '\0') {
                   1912:                aft_nl = "\n";
                   1913:                if (r->eqn != NULL)
                   1914:                        aft_pr = "\\&";
                   1915:        }
                   1916:
                   1917:        /* Do the actual replacement. */
                   1918:
                   1919:        *szp = mandoc_asprintf(&cp1, "%s%s%s%s%s%s%s", *bufp,
                   1920:            bef_pr, bef_nl, mac, aft_nl, aft_pr, cp2) + 1;
1.230     schwarze 1921:        free(*bufp);
                   1922:        *bufp = cp1;
                   1923:
                   1924:        /* Toggle the in-line state of the eqn subsystem. */
                   1925:
                   1926:        r->eqn_inline = r->eqn == NULL;
                   1927:        return(ROFF_REPARSE);
1.151     kristaps 1928: }
                   1929:
1.235     schwarze 1930: static enum rofferr
                   1931: roff_EQ(ROFF_ARGS)
1.125     kristaps 1932: {
1.151     kristaps 1933:        struct eqn_node *e;
1.125     kristaps 1934:
                   1935:        assert(NULL == r->eqn);
1.235     schwarze 1936:        e = eqn_alloc(ppos, ln, r->parse);
1.125     kristaps 1937:
1.230     schwarze 1938:        if (r->last_eqn) {
1.125     kristaps 1939:                r->last_eqn->next = e;
1.230     schwarze 1940:                e->delim = r->last_eqn->delim;
                   1941:                e->odelim = r->last_eqn->odelim;
                   1942:                e->cdelim = r->last_eqn->cdelim;
                   1943:        } else
1.125     kristaps 1944:                r->first_eqn = r->last_eqn = e;
                   1945:
                   1946:        r->eqn = r->last_eqn = e;
1.151     kristaps 1947:
1.235     schwarze 1948:        if ((*bufp)[pos])
                   1949:                mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
                   1950:                    ".EQ %s", *bufp + pos);
1.151     kristaps 1951:
1.125     kristaps 1952:        return(ROFF_IGN);
                   1953: }
                   1954:
                   1955: static enum rofferr
                   1956: roff_EN(ROFF_ARGS)
                   1957: {
                   1958:
1.221     schwarze 1959:        mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse, ln, ppos, "EN");
1.125     kristaps 1960:        return(ROFF_IGN);
                   1961: }
                   1962:
                   1963: static enum rofferr
1.109     kristaps 1964: roff_TS(ROFF_ARGS)
                   1965: {
1.176     schwarze 1966:        struct tbl_node *tbl;
1.89      kristaps 1967:
1.115     kristaps 1968:        if (r->tbl) {
1.221     schwarze 1969:                mandoc_msg(MANDOCERR_BLK_BROKEN, r->parse,
                   1970:                    ln, ppos, "TS breaks TS");
1.151     kristaps 1971:                tbl_end(&r->tbl);
1.115     kristaps 1972:        }
1.83      schwarze 1973:
1.176     schwarze 1974:        tbl = tbl_alloc(ppos, ln, r->parse);
1.113     kristaps 1975:
                   1976:        if (r->last_tbl)
1.176     schwarze 1977:                r->last_tbl->next = tbl;
1.113     kristaps 1978:        else
1.176     schwarze 1979:                r->first_tbl = r->last_tbl = tbl;
1.113     kristaps 1980:
1.176     schwarze 1981:        r->tbl = r->last_tbl = tbl;
1.83      schwarze 1982:        return(ROFF_IGN);
1.92      schwarze 1983: }
                   1984:
1.105     kristaps 1985: static enum rofferr
1.174     kristaps 1986: roff_cc(ROFF_ARGS)
                   1987: {
                   1988:        const char      *p;
                   1989:
                   1990:        p = *bufp + pos;
                   1991:
                   1992:        if ('\0' == *p || '.' == (r->control = *p++))
                   1993:                r->control = 0;
                   1994:
                   1995:        if ('\0' != *p)
                   1996:                mandoc_msg(MANDOCERR_ARGCOUNT, r->parse, ln, ppos, NULL);
                   1997:
                   1998:        return(ROFF_IGN);
                   1999: }
                   2000:
                   2001: static enum rofferr
1.164     kristaps 2002: roff_tr(ROFF_ARGS)
                   2003: {
                   2004:        const char      *p, *first, *second;
                   2005:        size_t           fsz, ssz;
                   2006:        enum mandoc_esc  esc;
                   2007:
                   2008:        p = *bufp + pos;
                   2009:
                   2010:        if ('\0' == *p) {
                   2011:                mandoc_msg(MANDOCERR_ARGCOUNT, r->parse, ln, ppos, NULL);
                   2012:                return(ROFF_IGN);
                   2013:        }
                   2014:
                   2015:        while ('\0' != *p) {
                   2016:                fsz = ssz = 1;
                   2017:
                   2018:                first = p++;
                   2019:                if ('\\' == *first) {
                   2020:                        esc = mandoc_escape(&p, NULL, NULL);
                   2021:                        if (ESCAPE_ERROR == esc) {
1.219     schwarze 2022:                                mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
                   2023:                                    ln, (int)(p - *bufp), first);
1.164     kristaps 2024:                                return(ROFF_IGN);
                   2025:                        }
                   2026:                        fsz = (size_t)(p - first);
                   2027:                }
                   2028:
                   2029:                second = p++;
                   2030:                if ('\\' == *second) {
                   2031:                        esc = mandoc_escape(&p, NULL, NULL);
                   2032:                        if (ESCAPE_ERROR == esc) {
1.219     schwarze 2033:                                mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
                   2034:                                    ln, (int)(p - *bufp), second);
1.164     kristaps 2035:                                return(ROFF_IGN);
                   2036:                        }
                   2037:                        ssz = (size_t)(p - second);
1.165     kristaps 2038:                } else if ('\0' == *second) {
1.207     schwarze 2039:                        mandoc_msg(MANDOCERR_ARGCOUNT, r->parse,
                   2040:                            ln, (int)(p - *bufp), NULL);
1.164     kristaps 2041:                        second = " ";
1.165     kristaps 2042:                        p--;
1.164     kristaps 2043:                }
                   2044:
1.167     kristaps 2045:                if (fsz > 1) {
1.207     schwarze 2046:                        roff_setstrn(&r->xmbtab, first, fsz,
                   2047:                            second, ssz, 0);
1.167     kristaps 2048:                        continue;
                   2049:                }
                   2050:
                   2051:                if (NULL == r->xtab)
1.207     schwarze 2052:                        r->xtab = mandoc_calloc(128,
                   2053:                            sizeof(struct roffstr));
1.167     kristaps 2054:
                   2055:                free(r->xtab[(int)*first].p);
                   2056:                r->xtab[(int)*first].p = mandoc_strndup(second, ssz);
                   2057:                r->xtab[(int)*first].sz = ssz;
1.164     kristaps 2058:        }
                   2059:
                   2060:        return(ROFF_IGN);
                   2061: }
                   2062:
                   2063: static enum rofferr
1.105     kristaps 2064: roff_so(ROFF_ARGS)
                   2065: {
                   2066:        char *name;
                   2067:
1.210     schwarze 2068:        name = *bufp + pos;
1.224     schwarze 2069:        mandoc_vmsg(MANDOCERR_SO, r->parse, ln, ppos, "so %s", name);
1.105     kristaps 2070:
                   2071:        /*
                   2072:         * Handle `so'.  Be EXTREMELY careful, as we shouldn't be
                   2073:         * opening anything that's not in our cwd or anything beneath
                   2074:         * it.  Thus, explicitly disallow traversing up the file-system
                   2075:         * or using absolute paths.
                   2076:         */
                   2077:
                   2078:        if ('/' == *name || strstr(name, "../") || strstr(name, "/..")) {
1.210     schwarze 2079:                mandoc_vmsg(MANDOCERR_SO_PATH, r->parse, ln, ppos,
                   2080:                    ".so %s", name);
1.105     kristaps 2081:                return(ROFF_ERR);
                   2082:        }
                   2083:
                   2084:        *offs = pos;
                   2085:        return(ROFF_SO);
                   2086: }
1.92      schwarze 2087:
1.106     kristaps 2088: static enum rofferr
                   2089: roff_userdef(ROFF_ARGS)
1.99      kristaps 2090: {
1.106     kristaps 2091:        const char       *arg[9];
                   2092:        char             *cp, *n1, *n2;
1.119     schwarze 2093:        int               i;
1.106     kristaps 2094:
                   2095:        /*
                   2096:         * Collect pointers to macro argument strings
1.188     schwarze 2097:         * and NUL-terminate them.
1.106     kristaps 2098:         */
                   2099:        cp = *bufp + pos;
1.119     schwarze 2100:        for (i = 0; i < 9; i++)
1.120     schwarze 2101:                arg[i] = '\0' == *cp ? "" :
1.136     kristaps 2102:                    mandoc_getarg(r->parse, &cp, ln, &pos);
1.99      kristaps 2103:
1.106     kristaps 2104:        /*
                   2105:         * Expand macro arguments.
1.99      kristaps 2106:         */
1.106     kristaps 2107:        *szp = 0;
                   2108:        n1 = cp = mandoc_strdup(r->current_string);
                   2109:        while (NULL != (cp = strstr(cp, "\\$"))) {
                   2110:                i = cp[2] - '1';
                   2111:                if (0 > i || 8 < i) {
                   2112:                        /* Not an argument invocation. */
                   2113:                        cp += 2;
                   2114:                        continue;
                   2115:                }
1.209     schwarze 2116:                *cp = '\0';
                   2117:                *szp = mandoc_asprintf(&n2, "%s%s%s",
                   2118:                    n1, arg[i], cp + 3) + 1;
1.106     kristaps 2119:                cp = n2 + (cp - n1);
                   2120:                free(n1);
                   2121:                n1 = n2;
1.99      kristaps 2122:        }
                   2123:
1.106     kristaps 2124:        /*
                   2125:         * Replace the macro invocation
                   2126:         * by the expanded macro.
                   2127:         */
                   2128:        free(*bufp);
                   2129:        *bufp = n1;
                   2130:        if (0 == *szp)
                   2131:                *szp = strlen(*bufp) + 1;
                   2132:
                   2133:        return(*szp > 1 && '\n' == (*bufp)[(int)*szp - 2] ?
                   2134:           ROFF_REPARSE : ROFF_APPEND);
1.99      kristaps 2135: }
1.121     schwarze 2136:
1.212     schwarze 2137: static size_t
1.121     schwarze 2138: roff_getname(struct roff *r, char **cpp, int ln, int pos)
                   2139: {
                   2140:        char     *name, *cp;
1.212     schwarze 2141:        size_t    namesz;
1.121     schwarze 2142:
                   2143:        name = *cpp;
                   2144:        if ('\0' == *name)
1.212     schwarze 2145:                return(0);
1.121     schwarze 2146:
1.212     schwarze 2147:        /* Read until end of name and terminate it with NUL. */
                   2148:        for (cp = name; 1; cp++) {
                   2149:                if ('\0' == *cp || ' ' == *cp) {
                   2150:                        namesz = cp - name;
                   2151:                        break;
                   2152:                }
1.121     schwarze 2153:                if ('\\' != *cp)
                   2154:                        continue;
1.215     schwarze 2155:                namesz = cp - name;
                   2156:                if ('{' == cp[1] || '}' == cp[1])
                   2157:                        break;
1.121     schwarze 2158:                cp++;
                   2159:                if ('\\' == *cp)
                   2160:                        continue;
1.224     schwarze 2161:                mandoc_vmsg(MANDOCERR_NAMESC, r->parse, ln, pos,
                   2162:                    "%.*s", (int)(cp - name + 1), name);
1.212     schwarze 2163:                mandoc_escape((const char **)&cp, NULL, NULL);
                   2164:                break;
1.121     schwarze 2165:        }
                   2166:
                   2167:        /* Read past spaces. */
                   2168:        while (' ' == *cp)
                   2169:                cp++;
                   2170:
                   2171:        *cpp = cp;
1.212     schwarze 2172:        return(namesz);
1.121     schwarze 2173: }
                   2174:
1.106     kristaps 2175: /*
                   2176:  * Store *string into the user-defined string called *name.
                   2177:  * To clear an existing entry, call with (*r, *name, NULL, 0).
1.193     schwarze 2178:  * append == 0: replace mode
                   2179:  * append == 1: single-line append mode
                   2180:  * append == 2: multiline append mode, append '\n' after each call
1.106     kristaps 2181:  */
1.94      kristaps 2182: static void
1.106     kristaps 2183: roff_setstr(struct roff *r, const char *name, const char *string,
1.193     schwarze 2184:        int append)
1.92      schwarze 2185: {
1.164     kristaps 2186:
                   2187:        roff_setstrn(&r->strtab, name, strlen(name), string,
1.207     schwarze 2188:            string ? strlen(string) : 0, append);
1.164     kristaps 2189: }
                   2190:
                   2191: static void
1.166     kristaps 2192: roff_setstrn(struct roffkv **r, const char *name, size_t namesz,
1.193     schwarze 2193:                const char *string, size_t stringsz, int append)
1.164     kristaps 2194: {
1.166     kristaps 2195:        struct roffkv   *n;
1.164     kristaps 2196:        char            *c;
                   2197:        int              i;
                   2198:        size_t           oldch, newch;
1.92      schwarze 2199:
1.106     kristaps 2200:        /* Search for an existing string with the same name. */
1.164     kristaps 2201:        n = *r;
                   2202:
1.211     schwarze 2203:        while (n && (namesz != n->key.sz ||
                   2204:                        strncmp(n->key.p, name, namesz)))
1.92      schwarze 2205:                n = n->next;
1.94      kristaps 2206:
                   2207:        if (NULL == n) {
1.106     kristaps 2208:                /* Create a new string table entry. */
1.166     kristaps 2209:                n = mandoc_malloc(sizeof(struct roffkv));
                   2210:                n->key.p = mandoc_strndup(name, namesz);
                   2211:                n->key.sz = namesz;
                   2212:                n->val.p = NULL;
                   2213:                n->val.sz = 0;
1.164     kristaps 2214:                n->next = *r;
                   2215:                *r = n;
1.193     schwarze 2216:        } else if (0 == append) {
1.166     kristaps 2217:                free(n->val.p);
                   2218:                n->val.p = NULL;
                   2219:                n->val.sz = 0;
1.106     kristaps 2220:        }
                   2221:
                   2222:        if (NULL == string)
                   2223:                return;
                   2224:
                   2225:        /*
                   2226:         * One additional byte for the '\n' in multiline mode,
                   2227:         * and one for the terminating '\0'.
                   2228:         */
1.193     schwarze 2229:        newch = stringsz + (1 < append ? 2u : 1u);
1.164     kristaps 2230:
1.166     kristaps 2231:        if (NULL == n->val.p) {
                   2232:                n->val.p = mandoc_malloc(newch);
                   2233:                *n->val.p = '\0';
1.106     kristaps 2234:                oldch = 0;
                   2235:        } else {
1.166     kristaps 2236:                oldch = n->val.sz;
                   2237:                n->val.p = mandoc_realloc(n->val.p, oldch + newch);
1.106     kristaps 2238:        }
                   2239:
                   2240:        /* Skip existing content in the destination buffer. */
1.166     kristaps 2241:        c = n->val.p + (int)oldch;
1.106     kristaps 2242:
                   2243:        /* Append new content to the destination buffer. */
1.164     kristaps 2244:        i = 0;
                   2245:        while (i < (int)stringsz) {
1.106     kristaps 2246:                /*
                   2247:                 * Rudimentary roff copy mode:
                   2248:                 * Handle escaped backslashes.
                   2249:                 */
1.164     kristaps 2250:                if ('\\' == string[i] && '\\' == string[i + 1])
                   2251:                        i++;
                   2252:                *c++ = string[i++];
1.106     kristaps 2253:        }
1.94      kristaps 2254:
1.106     kristaps 2255:        /* Append terminating bytes. */
1.193     schwarze 2256:        if (1 < append)
1.106     kristaps 2257:                *c++ = '\n';
1.163     kristaps 2258:
1.106     kristaps 2259:        *c = '\0';
1.166     kristaps 2260:        n->val.sz = (int)(c - n->val.p);
1.92      schwarze 2261: }
                   2262:
1.94      kristaps 2263: static const char *
                   2264: roff_getstrn(const struct roff *r, const char *name, size_t len)
1.92      schwarze 2265: {
1.166     kristaps 2266:        const struct roffkv *n;
1.191     schwarze 2267:        int i;
1.92      schwarze 2268:
1.164     kristaps 2269:        for (n = r->strtab; n; n = n->next)
1.207     schwarze 2270:                if (0 == strncmp(name, n->key.p, len) &&
                   2271:                    '\0' == n->key.p[(int)len])
1.166     kristaps 2272:                        return(n->val.p);
1.191     schwarze 2273:
                   2274:        for (i = 0; i < PREDEFS_MAX; i++)
                   2275:                if (0 == strncmp(name, predefs[i].name, len) &&
                   2276:                                '\0' == predefs[i].name[(int)len])
                   2277:                        return(predefs[i].str);
1.94      kristaps 2278:
1.157     kristaps 2279:        return(NULL);
1.92      schwarze 2280: }
                   2281:
1.94      kristaps 2282: static void
1.167     kristaps 2283: roff_freestr(struct roffkv *r)
1.92      schwarze 2284: {
1.166     kristaps 2285:        struct roffkv    *n, *nn;
1.92      schwarze 2286:
1.167     kristaps 2287:        for (n = r; n; n = nn) {
1.166     kristaps 2288:                free(n->key.p);
                   2289:                free(n->val.p);
1.92      schwarze 2290:                nn = n->next;
                   2291:                free(n);
                   2292:        }
1.114     kristaps 2293: }
                   2294:
                   2295: const struct tbl_span *
                   2296: roff_span(const struct roff *r)
                   2297: {
1.207     schwarze 2298:
1.114     kristaps 2299:        return(r->tbl ? tbl_span(r->tbl) : NULL);
1.125     kristaps 2300: }
                   2301:
                   2302: const struct eqn *
                   2303: roff_eqn(const struct roff *r)
                   2304: {
1.207     schwarze 2305:
1.125     kristaps 2306:        return(r->last_eqn ? &r->last_eqn->eqn : NULL);
1.164     kristaps 2307: }
                   2308:
                   2309: /*
                   2310:  * Duplicate an input string, making the appropriate character
                   2311:  * conversations (as stipulated by `tr') along the way.
                   2312:  * Returns a heap-allocated string with all the replacements made.
                   2313:  */
                   2314: char *
                   2315: roff_strdup(const struct roff *r, const char *p)
                   2316: {
1.166     kristaps 2317:        const struct roffkv *cp;
1.164     kristaps 2318:        char            *res;
                   2319:        const char      *pp;
                   2320:        size_t           ssz, sz;
                   2321:        enum mandoc_esc  esc;
                   2322:
1.167     kristaps 2323:        if (NULL == r->xmbtab && NULL == r->xtab)
1.164     kristaps 2324:                return(mandoc_strdup(p));
                   2325:        else if ('\0' == *p)
                   2326:                return(mandoc_strdup(""));
                   2327:
                   2328:        /*
                   2329:         * Step through each character looking for term matches
                   2330:         * (remember that a `tr' can be invoked with an escape, which is
                   2331:         * a glyph but the escape is multi-character).
                   2332:         * We only do this if the character hash has been initialised
                   2333:         * and the string is >0 length.
                   2334:         */
                   2335:
                   2336:        res = NULL;
                   2337:        ssz = 0;
                   2338:
                   2339:        while ('\0' != *p) {
1.167     kristaps 2340:                if ('\\' != *p && r->xtab && r->xtab[(int)*p].p) {
                   2341:                        sz = r->xtab[(int)*p].sz;
                   2342:                        res = mandoc_realloc(res, ssz + sz + 1);
                   2343:                        memcpy(res + ssz, r->xtab[(int)*p].p, sz);
                   2344:                        ssz += sz;
                   2345:                        p++;
                   2346:                        continue;
                   2347:                } else if ('\\' != *p) {
                   2348:                        res = mandoc_realloc(res, ssz + 2);
                   2349:                        res[ssz++] = *p++;
                   2350:                        continue;
                   2351:                }
                   2352:
1.164     kristaps 2353:                /* Search for term matches. */
1.167     kristaps 2354:                for (cp = r->xmbtab; cp; cp = cp->next)
1.166     kristaps 2355:                        if (0 == strncmp(p, cp->key.p, cp->key.sz))
1.164     kristaps 2356:                                break;
                   2357:
                   2358:                if (NULL != cp) {
                   2359:                        /*
                   2360:                         * A match has been found.
                   2361:                         * Append the match to the array and move
                   2362:                         * forward by its keysize.
                   2363:                         */
1.207     schwarze 2364:                        res = mandoc_realloc(res,
                   2365:                            ssz + cp->val.sz + 1);
1.166     kristaps 2366:                        memcpy(res + ssz, cp->val.p, cp->val.sz);
                   2367:                        ssz += cp->val.sz;
                   2368:                        p += (int)cp->key.sz;
1.164     kristaps 2369:                        continue;
                   2370:                }
                   2371:
1.167     kristaps 2372:                /*
                   2373:                 * Handle escapes carefully: we need to copy
                   2374:                 * over just the escape itself, or else we might
                   2375:                 * do replacements within the escape itself.
                   2376:                 * Make sure to pass along the bogus string.
                   2377:                 */
                   2378:                pp = p++;
                   2379:                esc = mandoc_escape(&p, NULL, NULL);
                   2380:                if (ESCAPE_ERROR == esc) {
                   2381:                        sz = strlen(pp);
1.164     kristaps 2382:                        res = mandoc_realloc(res, ssz + sz + 1);
                   2383:                        memcpy(res + ssz, pp, sz);
1.167     kristaps 2384:                        break;
1.164     kristaps 2385:                }
1.207     schwarze 2386:                /*
                   2387:                 * We bail out on bad escapes.
1.167     kristaps 2388:                 * No need to warn: we already did so when
                   2389:                 * roff_res() was called.
                   2390:                 */
                   2391:                sz = (int)(p - pp);
                   2392:                res = mandoc_realloc(res, ssz + sz + 1);
                   2393:                memcpy(res + ssz, pp, sz);
                   2394:                ssz += sz;
1.164     kristaps 2395:        }
                   2396:
                   2397:        res[(int)ssz] = '\0';
                   2398:        return(res);
1.227     schwarze 2399: }
                   2400:
                   2401: int
                   2402: roff_getformat(const struct roff *r)
                   2403: {
                   2404:
                   2405:        return(r->format);
1.174     kristaps 2406: }
                   2407:
                   2408: /*
1.207     schwarze 2409:  * Find out whether a line is a macro line or not.
1.174     kristaps 2410:  * If it is, adjust the current position and return one; if it isn't,
                   2411:  * return zero and don't change the current position.
                   2412:  * If the control character has been set with `.cc', then let that grain
                   2413:  * precedence.
                   2414:  * This is slighly contrary to groff, where using the non-breaking
                   2415:  * control character when `cc' has been invoked will cause the
                   2416:  * non-breaking macro contents to be printed verbatim.
                   2417:  */
                   2418: int
                   2419: roff_getcontrol(const struct roff *r, const char *cp, int *ppos)
                   2420: {
                   2421:        int             pos;
                   2422:
                   2423:        pos = *ppos;
                   2424:
                   2425:        if (0 != r->control && cp[pos] == r->control)
                   2426:                pos++;
                   2427:        else if (0 != r->control)
                   2428:                return(0);
                   2429:        else if ('\\' == cp[pos] && '.' == cp[pos + 1])
                   2430:                pos += 2;
                   2431:        else if ('.' == cp[pos] || '\'' == cp[pos])
                   2432:                pos++;
                   2433:        else
                   2434:                return(0);
                   2435:
                   2436:        while (' ' == cp[pos] || '\t' == cp[pos])
                   2437:                pos++;
                   2438:
                   2439:        *ppos = pos;
                   2440:        return(1);
1.74      kristaps 2441: }

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