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Annotation of mandoc/roff.c, Revision 1.272

1.272   ! schwarze    1: /*     $Id: roff.c,v 1.271 2015/05/31 23:13:22 schwarze Exp $ */
1.1       kristaps    2: /*
1.267     schwarze    3:  * Copyright (c) 2008-2012, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
1.247     schwarze    4:  * Copyright (c) 2010-2015 Ingo Schwarze <schwarze@openbsd.org>
1.1       kristaps    5:  *
                      6:  * Permission to use, copy, modify, and distribute this software for any
1.66      kristaps    7:  * purpose with or without fee is hereby granted, provided that the above
                      8:  * copyright notice and this permission notice appear in all copies.
1.1       kristaps    9:  *
1.106     kristaps   10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.66      kristaps   11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.106     kristaps   12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.66      kristaps   13:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     14:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     15:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     16:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1       kristaps   17:  */
1.66      kristaps   18: #include "config.h"
1.225     schwarze   19:
                     20: #include <sys/types.h>
1.30      kristaps   21:
1.67      kristaps   22: #include <assert.h>
1.85      kristaps   23: #include <ctype.h>
1.245     schwarze   24: #include <limits.h>
1.178     schwarze   25: #include <stdio.h>
1.1       kristaps   26: #include <stdlib.h>
1.67      kristaps   27: #include <string.h>
1.1       kristaps   28:
1.67      kristaps   29: #include "mandoc.h"
1.201     schwarze   30: #include "mandoc_aux.h"
1.265     schwarze   31: #include "roff.h"
1.226     schwarze   32: #include "libmandoc.h"
1.266     schwarze   33: #include "roff_int.h"
1.109     kristaps   34: #include "libroff.h"
1.33      kristaps   35:
1.141     kristaps   36: /* Maximum number of nested if-else conditionals. */
1.82      kristaps   37: #define        RSTACK_MAX      128
                     38:
1.170     schwarze   39: /* Maximum number of string expansions per line, to break infinite loops. */
                     40: #define        EXPAND_LIMIT    1000
                     41:
1.266     schwarze   42: /* --- data types --------------------------------------------------------- */
                     43:
1.67      kristaps   44: enum   rofft {
1.251     schwarze   45:        ROFF_ab,
1.103     kristaps   46:        ROFF_ad,
1.251     schwarze   47:        ROFF_af,
                     48:        ROFF_aln,
                     49:        ROFF_als,
1.80      kristaps   50:        ROFF_am,
1.251     schwarze   51:        ROFF_am1,
1.80      kristaps   52:        ROFF_ami,
1.251     schwarze   53:        ROFF_ami1,
1.193     schwarze   54:        ROFF_as,
1.251     schwarze   55:        ROFF_as1,
                     56:        ROFF_asciify,
                     57:        ROFF_backtrace,
                     58:        ROFF_bd,
                     59:        ROFF_bleedat,
                     60:        ROFF_blm,
                     61:        ROFF_box,
                     62:        ROFF_boxa,
                     63:        ROFF_bp,
                     64:        ROFF_BP,
                     65:        /* MAN_br, MDOC_br */
                     66:        ROFF_break,
                     67:        ROFF_breakchar,
                     68:        ROFF_brnl,
                     69:        ROFF_brp,
                     70:        ROFF_brpnl,
                     71:        ROFF_c2,
1.174     kristaps   72:        ROFF_cc,
1.194     schwarze   73:        ROFF_ce,
1.251     schwarze   74:        ROFF_cf,
                     75:        ROFF_cflags,
                     76:        ROFF_ch,
                     77:        ROFF_char,
                     78:        ROFF_chop,
                     79:        ROFF_class,
                     80:        ROFF_close,
                     81:        ROFF_CL,
                     82:        ROFF_color,
                     83:        ROFF_composite,
                     84:        ROFF_continue,
                     85:        ROFF_cp,
                     86:        ROFF_cropat,
                     87:        ROFF_cs,
                     88:        ROFF_cu,
                     89:        ROFF_da,
                     90:        ROFF_dch,
                     91:        ROFF_Dd,
1.80      kristaps   92:        ROFF_de,
1.251     schwarze   93:        ROFF_de1,
                     94:        ROFF_defcolor,
1.80      kristaps   95:        ROFF_dei,
1.251     schwarze   96:        ROFF_dei1,
                     97:        ROFF_device,
                     98:        ROFF_devicem,
                     99:        ROFF_di,
                    100:        ROFF_do,
1.83      schwarze  101:        ROFF_ds,
1.251     schwarze  102:        ROFF_ds1,
                    103:        ROFF_dwh,
                    104:        ROFF_dt,
                    105:        ROFF_ec,
                    106:        ROFF_ecr,
                    107:        ROFF_ecs,
1.82      kristaps  108:        ROFF_el,
1.251     schwarze  109:        ROFF_em,
                    110:        ROFF_EN,
                    111:        ROFF_eo,
                    112:        ROFF_EP,
                    113:        ROFF_EQ,
                    114:        ROFF_errprint,
                    115:        ROFF_ev,
                    116:        ROFF_evc,
                    117:        ROFF_ex,
                    118:        ROFF_fallback,
1.185     schwarze  119:        ROFF_fam,
1.251     schwarze  120:        ROFF_fc,
                    121:        ROFF_fchar,
                    122:        ROFF_fcolor,
                    123:        ROFF_fdeferlig,
                    124:        ROFF_feature,
                    125:        /* MAN_fi; ignored in mdoc(7) */
                    126:        ROFF_fkern,
                    127:        ROFF_fl,
                    128:        ROFF_flig,
                    129:        ROFF_fp,
                    130:        ROFF_fps,
                    131:        ROFF_fschar,
                    132:        ROFF_fspacewidth,
                    133:        ROFF_fspecial,
                    134:        /* MAN_ft; ignored in mdoc(7) */
                    135:        ROFF_ftr,
                    136:        ROFF_fzoom,
                    137:        ROFF_gcolor,
                    138:        ROFF_hc,
                    139:        ROFF_hcode,
                    140:        ROFF_hidechar,
                    141:        ROFF_hla,
                    142:        ROFF_hlm,
                    143:        ROFF_hpf,
                    144:        ROFF_hpfa,
                    145:        ROFF_hpfcode,
1.186     schwarze  146:        ROFF_hw,
1.103     kristaps  147:        ROFF_hy,
1.251     schwarze  148:        ROFF_hylang,
                    149:        ROFF_hylen,
                    150:        ROFF_hym,
                    151:        ROFF_hypp,
                    152:        ROFF_hys,
1.82      kristaps  153:        ROFF_ie,
1.75      kristaps  154:        ROFF_if,
1.76      kristaps  155:        ROFF_ig,
1.251     schwarze  156:        /* MAN_in; ignored in mdoc(7) */
                    157:        ROFF_index,
1.123     schwarze  158:        ROFF_it,
1.251     schwarze  159:        ROFF_itc,
                    160:        ROFF_IX,
                    161:        ROFF_kern,
                    162:        ROFF_kernafter,
                    163:        ROFF_kernbefore,
                    164:        ROFF_kernpair,
                    165:        ROFF_lc,
                    166:        ROFF_lc_ctype,
                    167:        ROFF_lds,
                    168:        ROFF_length,
                    169:        ROFF_letadj,
                    170:        ROFF_lf,
                    171:        ROFF_lg,
                    172:        ROFF_lhang,
                    173:        ROFF_linetabs,
                    174:        /* MAN_ll, MDOC_ll */
                    175:        ROFF_lnr,
                    176:        ROFF_lnrf,
                    177:        ROFF_lpfx,
                    178:        ROFF_ls,
                    179:        ROFF_lsm,
                    180:        ROFF_lt,
                    181:        ROFF_mc,
                    182:        ROFF_mediasize,
                    183:        ROFF_minss,
                    184:        ROFF_mk,
                    185:        ROFF_mso,
1.256     schwarze  186:        ROFF_na,
1.103     kristaps  187:        ROFF_ne,
1.251     schwarze  188:        /* MAN_nf; ignored in mdoc(7) */
1.103     kristaps  189:        ROFF_nh,
1.251     schwarze  190:        ROFF_nhychar,
                    191:        ROFF_nm,
                    192:        ROFF_nn,
                    193:        ROFF_nop,
1.104     kristaps  194:        ROFF_nr,
1.251     schwarze  195:        ROFF_nrf,
                    196:        ROFF_nroff,
1.124     schwarze  197:        ROFF_ns,
1.251     schwarze  198:        ROFF_nx,
                    199:        ROFF_open,
                    200:        ROFF_opena,
                    201:        ROFF_os,
                    202:        ROFF_output,
                    203:        ROFF_padj,
                    204:        ROFF_papersize,
                    205:        ROFF_pc,
                    206:        ROFF_pev,
                    207:        ROFF_pi,
                    208:        ROFF_PI,
1.229     schwarze  209:        ROFF_pl,
1.251     schwarze  210:        ROFF_pm,
                    211:        ROFF_pn,
                    212:        ROFF_pnr,
                    213:        ROFF_po,
1.124     schwarze  214:        ROFF_ps,
1.251     schwarze  215:        ROFF_psbb,
                    216:        ROFF_pshape,
                    217:        ROFF_pso,
                    218:        ROFF_ptr,
                    219:        ROFF_pvs,
                    220:        ROFF_rchar,
                    221:        ROFF_rd,
                    222:        ROFF_recursionlimit,
                    223:        ROFF_return,
                    224:        ROFF_rfschar,
                    225:        ROFF_rhang,
                    226:        ROFF_rj,
1.83      schwarze  227:        ROFF_rm,
1.251     schwarze  228:        ROFF_rn,
                    229:        ROFF_rnn,
1.203     schwarze  230:        ROFF_rr,
1.251     schwarze  231:        ROFF_rs,
                    232:        ROFF_rt,
                    233:        ROFF_schar,
                    234:        ROFF_sentchar,
                    235:        ROFF_shc,
                    236:        ROFF_shift,
                    237:        ROFF_sizes,
1.105     kristaps  238:        ROFF_so,
1.251     schwarze  239:        /* MAN_sp, MDOC_sp */
                    240:        ROFF_spacewidth,
                    241:        ROFF_special,
                    242:        ROFF_spreadwarn,
                    243:        ROFF_ss,
                    244:        ROFF_sty,
                    245:        ROFF_substring,
                    246:        ROFF_sv,
                    247:        ROFF_sy,
                    248:        ROFF_T_,
1.124     schwarze  249:        ROFF_ta,
1.251     schwarze  250:        ROFF_tc,
                    251:        ROFF_TE,
                    252:        ROFF_TH,
                    253:        ROFF_ti,
                    254:        ROFF_tkf,
                    255:        ROFF_tl,
                    256:        ROFF_tm,
                    257:        ROFF_tm1,
                    258:        ROFF_tmc,
1.83      schwarze  259:        ROFF_tr,
1.251     schwarze  260:        ROFF_track,
                    261:        ROFF_transchar,
                    262:        ROFF_trf,
                    263:        ROFF_trimat,
                    264:        ROFF_trin,
                    265:        ROFF_trnt,
                    266:        ROFF_troff,
1.109     kristaps  267:        ROFF_TS,
1.251     schwarze  268:        ROFF_uf,
                    269:        ROFF_ul,
                    270:        ROFF_unformat,
                    271:        ROFF_unwatch,
                    272:        ROFF_unwatchn,
                    273:        ROFF_vpt,
                    274:        ROFF_vs,
                    275:        ROFF_warn,
                    276:        ROFF_warnscale,
                    277:        ROFF_watch,
                    278:        ROFF_watchlength,
                    279:        ROFF_watchn,
                    280:        ROFF_wh,
                    281:        ROFF_while,
                    282:        ROFF_write,
                    283:        ROFF_writec,
                    284:        ROFF_writem,
                    285:        ROFF_xflag,
1.76      kristaps  286:        ROFF_cblock,
1.106     kristaps  287:        ROFF_USERDEF,
1.67      kristaps  288:        ROFF_MAX
                    289: };
                    290:
1.147     kristaps  291: /*
1.167     kristaps  292:  * An incredibly-simple string buffer.
                    293:  */
1.94      kristaps  294: struct roffstr {
1.167     kristaps  295:        char            *p; /* nil-terminated buffer */
                    296:        size_t           sz; /* saved strlen(p) */
1.166     kristaps  297: };
                    298:
                    299: /*
1.167     kristaps  300:  * A key-value roffstr pair as part of a singly-linked list.
1.166     kristaps  301:  */
                    302: struct roffkv {
                    303:        struct roffstr   key;
                    304:        struct roffstr   val;
                    305:        struct roffkv   *next; /* next in list */
1.94      kristaps  306: };
                    307:
1.180     schwarze  308: /*
                    309:  * A single number register as part of a singly-linked list.
                    310:  */
                    311: struct roffreg {
                    312:        struct roffstr   key;
1.181     schwarze  313:        int              val;
1.180     schwarze  314:        struct roffreg  *next;
                    315: };
                    316:
1.67      kristaps  317: struct roff {
1.128     kristaps  318:        struct mparse   *parse; /* parse point */
1.237     schwarze  319:        const struct mchars *mchars; /* character table */
1.67      kristaps  320:        struct roffnode *last; /* leaf of stack */
1.223     schwarze  321:        int             *rstack; /* stack of inverted `ie' values */
1.180     schwarze  322:        struct roffreg  *regtab; /* number registers */
1.166     kristaps  323:        struct roffkv   *strtab; /* user-defined strings & macros */
1.167     kristaps  324:        struct roffkv   *xmbtab; /* multi-byte trans table (`tr') */
                    325:        struct roffstr  *xtab; /* single-byte trans table (`tr') */
1.106     kristaps  326:        const char      *current_string; /* value of last called user macro */
1.118     kristaps  327:        struct tbl_node *first_tbl; /* first table parsed */
                    328:        struct tbl_node *last_tbl; /* last table parsed */
                    329:        struct tbl_node *tbl; /* current table being parsed */
1.125     kristaps  330:        struct eqn_node *last_eqn; /* last equation parsed */
                    331:        struct eqn_node *first_eqn; /* first equation parsed */
                    332:        struct eqn_node *eqn; /* current equation being parsed */
1.230     schwarze  333:        int              eqn_inline; /* current equation is inline */
1.223     schwarze  334:        int              options; /* parse options */
                    335:        int              rstacksz; /* current size limit of rstack */
                    336:        int              rstackpos; /* position in rstack */
1.227     schwarze  337:        int              format; /* current file in mdoc or man format */
1.223     schwarze  338:        char             control; /* control character */
1.79      kristaps  339: };
                    340:
1.67      kristaps  341: struct roffnode {
                    342:        enum rofft       tok; /* type of node */
                    343:        struct roffnode *parent; /* up one in stack */
                    344:        int              line; /* parse line */
                    345:        int              col; /* parse col */
1.106     kristaps  346:        char            *name; /* node name, e.g. macro name */
1.79      kristaps  347:        char            *end; /* end-rules: custom token */
                    348:        int              endspan; /* end-rules: next-line or infty */
1.198     schwarze  349:        int              rule; /* current evaluation rule */
1.67      kristaps  350: };
                    351:
                    352: #define        ROFF_ARGS        struct roff *r, /* parse ctx */ \
1.72      kristaps  353:                         enum rofft tok, /* tok of macro */ \
1.238     schwarze  354:                         struct buf *buf, /* input buffer */ \
1.67      kristaps  355:                         int ln, /* parse line */ \
1.75      kristaps  356:                         int ppos, /* original pos in buffer */ \
                    357:                         int pos, /* current pos in buffer */ \
1.74      kristaps  358:                         int *offs /* reset offset of buffer data */
1.67      kristaps  359:
                    360: typedef        enum rofferr (*roffproc)(ROFF_ARGS);
                    361:
                    362: struct roffmac {
                    363:        const char      *name; /* macro name */
1.79      kristaps  364:        roffproc         proc; /* process new macro */
                    365:        roffproc         text; /* process as child text of macro */
                    366:        roffproc         sub; /* process as child of macro */
                    367:        int              flags;
                    368: #define        ROFFMAC_STRUCT  (1 << 0) /* always interpret */
1.85      kristaps  369:        struct roffmac  *next;
1.67      kristaps  370: };
                    371:
1.141     kristaps  372: struct predef {
                    373:        const char      *name; /* predefined input name */
                    374:        const char      *str; /* replacement symbol */
                    375: };
                    376:
                    377: #define        PREDEF(__name, __str) \
                    378:        { (__name), (__str) },
                    379:
1.266     schwarze  380: /* --- function prototypes ------------------------------------------------ */
                    381:
1.155     kristaps  382: static enum rofft       roffhash_find(const char *, size_t);
                    383: static void             roffhash_init(void);
                    384: static void             roffnode_cleanscope(struct roff *);
                    385: static void             roffnode_pop(struct roff *);
                    386: static void             roffnode_push(struct roff *, enum rofft,
                    387:                                const char *, int, int);
1.80      kristaps  388: static enum rofferr     roff_block(ROFF_ARGS);
                    389: static enum rofferr     roff_block_text(ROFF_ARGS);
                    390: static enum rofferr     roff_block_sub(ROFF_ARGS);
1.251     schwarze  391: static enum rofferr     roff_brp(ROFF_ARGS);
1.80      kristaps  392: static enum rofferr     roff_cblock(ROFF_ARGS);
1.174     kristaps  393: static enum rofferr     roff_cc(ROFF_ARGS);
1.195     schwarze  394: static void             roff_ccond(struct roff *, int, int);
1.82      kristaps  395: static enum rofferr     roff_cond(ROFF_ARGS);
                    396: static enum rofferr     roff_cond_text(ROFF_ARGS);
                    397: static enum rofferr     roff_cond_sub(ROFF_ARGS);
1.92      schwarze  398: static enum rofferr     roff_ds(ROFF_ARGS);
1.238     schwarze  399: static enum rofferr     roff_eqndelim(struct roff *, struct buf *, int);
1.271     schwarze  400: static int              roff_evalcond(struct roff *r, int, char *, int *);
1.234     kristaps  401: static int              roff_evalnum(struct roff *, int,
                    402:                                const char *, int *, int *, int);
                    403: static int              roff_evalpar(struct roff *, int,
1.261     schwarze  404:                                const char *, int *, int *, int);
1.198     schwarze  405: static int              roff_evalstrcond(const char *, int *);
1.155     kristaps  406: static void             roff_free1(struct roff *);
1.180     schwarze  407: static void             roff_freereg(struct roffreg *);
1.167     kristaps  408: static void             roff_freestr(struct roffkv *);
1.212     schwarze  409: static size_t           roff_getname(struct roff *, char **, int, int);
1.261     schwarze  410: static int              roff_getnum(const char *, int *, int *, int);
1.184     schwarze  411: static int              roff_getop(const char *, int *, char *);
1.181     schwarze  412: static int              roff_getregn(const struct roff *,
                    413:                                const char *, size_t);
1.192     schwarze  414: static int              roff_getregro(const char *name);
1.207     schwarze  415: static const char      *roff_getstrn(const struct roff *,
1.94      kristaps  416:                                const char *, size_t);
1.271     schwarze  417: static int              roff_hasregn(const struct roff *,
                    418:                                const char *, size_t);
1.251     schwarze  419: static enum rofferr     roff_insec(ROFF_ARGS);
1.178     schwarze  420: static enum rofferr     roff_it(ROFF_ARGS);
1.103     kristaps  421: static enum rofferr     roff_line_ignore(ROFF_ARGS);
1.265     schwarze  422: static void             roff_man_alloc1(struct roff_man *);
                    423: static void             roff_man_free1(struct roff_man *);
1.89      kristaps  424: static enum rofferr     roff_nr(ROFF_ARGS);
1.214     schwarze  425: static enum rofft       roff_parse(struct roff *, char *, int *,
                    426:                                int, int);
1.238     schwarze  427: static enum rofferr     roff_parsetext(struct buf *, int, int *);
                    428: static enum rofferr     roff_res(struct roff *, struct buf *, int, int);
1.122     schwarze  429: static enum rofferr     roff_rm(ROFF_ARGS);
1.203     schwarze  430: static enum rofferr     roff_rr(ROFF_ARGS);
1.94      kristaps  431: static void             roff_setstr(struct roff *,
1.106     kristaps  432:                                const char *, const char *, int);
1.207     schwarze  433: static void             roff_setstrn(struct roffkv **, const char *,
1.164     kristaps  434:                                size_t, const char *, size_t, int);
1.105     kristaps  435: static enum rofferr     roff_so(ROFF_ARGS);
1.164     kristaps  436: static enum rofferr     roff_tr(ROFF_ARGS);
1.175     schwarze  437: static enum rofferr     roff_Dd(ROFF_ARGS);
                    438: static enum rofferr     roff_TH(ROFF_ARGS);
1.109     kristaps  439: static enum rofferr     roff_TE(ROFF_ARGS);
                    440: static enum rofferr     roff_TS(ROFF_ARGS);
1.125     kristaps  441: static enum rofferr     roff_EQ(ROFF_ARGS);
                    442: static enum rofferr     roff_EN(ROFF_ARGS);
1.112     kristaps  443: static enum rofferr     roff_T_(ROFF_ARGS);
1.251     schwarze  444: static enum rofferr     roff_unsupp(ROFF_ARGS);
1.106     kristaps  445: static enum rofferr     roff_userdef(ROFF_ARGS);
1.67      kristaps  446:
1.266     schwarze  447: /* --- constant data ------------------------------------------------------ */
                    448:
1.155     kristaps  449: /* See roffhash_find() */
1.85      kristaps  450:
                    451: #define        ASCII_HI         126
                    452: #define        ASCII_LO         33
                    453: #define        HASHWIDTH       (ASCII_HI - ASCII_LO + 1)
                    454:
1.261     schwarze  455: #define        ROFFNUM_SCALE   (1 << 0)  /* Honour scaling in roff_getnum(). */
                    456: #define        ROFFNUM_WHITE   (1 << 1)  /* Skip whitespace in roff_evalnum(). */
                    457:
1.85      kristaps  458: static struct roffmac  *hash[HASHWIDTH];
                    459:
                    460: static struct roffmac   roffs[ROFF_MAX] = {
1.251     schwarze  461:        { "ab", roff_unsupp, NULL, NULL, 0, NULL },
1.103     kristaps  462:        { "ad", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  463:        { "af", roff_line_ignore, NULL, NULL, 0, NULL },
                    464:        { "aln", roff_unsupp, NULL, NULL, 0, NULL },
                    465:        { "als", roff_unsupp, NULL, NULL, 0, NULL },
1.85      kristaps  466:        { "am", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.251     schwarze  467:        { "am1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.85      kristaps  468:        { "ami", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.251     schwarze  469:        { "ami1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.193     schwarze  470:        { "as", roff_ds, NULL, NULL, 0, NULL },
1.251     schwarze  471:        { "as1", roff_ds, NULL, NULL, 0, NULL },
                    472:        { "asciify", roff_unsupp, NULL, NULL, 0, NULL },
                    473:        { "backtrace", roff_line_ignore, NULL, NULL, 0, NULL },
                    474:        { "bd", roff_line_ignore, NULL, NULL, 0, NULL },
                    475:        { "bleedat", roff_line_ignore, NULL, NULL, 0, NULL },
                    476:        { "blm", roff_unsupp, NULL, NULL, 0, NULL },
                    477:        { "box", roff_unsupp, NULL, NULL, 0, NULL },
                    478:        { "boxa", roff_unsupp, NULL, NULL, 0, NULL },
                    479:        { "bp", roff_line_ignore, NULL, NULL, 0, NULL },
                    480:        { "BP", roff_unsupp, NULL, NULL, 0, NULL },
                    481:        { "break", roff_unsupp, NULL, NULL, 0, NULL },
                    482:        { "breakchar", roff_line_ignore, NULL, NULL, 0, NULL },
                    483:        { "brnl", roff_line_ignore, NULL, NULL, 0, NULL },
                    484:        { "brp", roff_brp, NULL, NULL, 0, NULL },
                    485:        { "brpnl", roff_line_ignore, NULL, NULL, 0, NULL },
                    486:        { "c2", roff_unsupp, NULL, NULL, 0, NULL },
1.174     kristaps  487:        { "cc", roff_cc, NULL, NULL, 0, NULL },
1.194     schwarze  488:        { "ce", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  489:        { "cf", roff_insec, NULL, NULL, 0, NULL },
                    490:        { "cflags", roff_line_ignore, NULL, NULL, 0, NULL },
                    491:        { "ch", roff_line_ignore, NULL, NULL, 0, NULL },
                    492:        { "char", roff_unsupp, NULL, NULL, 0, NULL },
                    493:        { "chop", roff_unsupp, NULL, NULL, 0, NULL },
                    494:        { "class", roff_line_ignore, NULL, NULL, 0, NULL },
                    495:        { "close", roff_insec, NULL, NULL, 0, NULL },
                    496:        { "CL", roff_unsupp, NULL, NULL, 0, NULL },
                    497:        { "color", roff_line_ignore, NULL, NULL, 0, NULL },
                    498:        { "composite", roff_unsupp, NULL, NULL, 0, NULL },
                    499:        { "continue", roff_unsupp, NULL, NULL, 0, NULL },
                    500:        { "cp", roff_line_ignore, NULL, NULL, 0, NULL },
                    501:        { "cropat", roff_line_ignore, NULL, NULL, 0, NULL },
                    502:        { "cs", roff_line_ignore, NULL, NULL, 0, NULL },
                    503:        { "cu", roff_line_ignore, NULL, NULL, 0, NULL },
                    504:        { "da", roff_unsupp, NULL, NULL, 0, NULL },
                    505:        { "dch", roff_unsupp, NULL, NULL, 0, NULL },
                    506:        { "Dd", roff_Dd, NULL, NULL, 0, NULL },
1.85      kristaps  507:        { "de", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.251     schwarze  508:        { "de1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
                    509:        { "defcolor", roff_line_ignore, NULL, NULL, 0, NULL },
1.85      kristaps  510:        { "dei", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.251     schwarze  511:        { "dei1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
                    512:        { "device", roff_unsupp, NULL, NULL, 0, NULL },
                    513:        { "devicem", roff_unsupp, NULL, NULL, 0, NULL },
                    514:        { "di", roff_unsupp, NULL, NULL, 0, NULL },
                    515:        { "do", roff_unsupp, NULL, NULL, 0, NULL },
1.92      schwarze  516:        { "ds", roff_ds, NULL, NULL, 0, NULL },
1.251     schwarze  517:        { "ds1", roff_ds, NULL, NULL, 0, NULL },
                    518:        { "dwh", roff_unsupp, NULL, NULL, 0, NULL },
                    519:        { "dt", roff_unsupp, NULL, NULL, 0, NULL },
                    520:        { "ec", roff_unsupp, NULL, NULL, 0, NULL },
                    521:        { "ecr", roff_unsupp, NULL, NULL, 0, NULL },
                    522:        { "ecs", roff_unsupp, NULL, NULL, 0, NULL },
1.85      kristaps  523:        { "el", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
1.251     schwarze  524:        { "em", roff_unsupp, NULL, NULL, 0, NULL },
                    525:        { "EN", roff_EN, NULL, NULL, 0, NULL },
                    526:        { "eo", roff_unsupp, NULL, NULL, 0, NULL },
                    527:        { "EP", roff_unsupp, NULL, NULL, 0, NULL },
                    528:        { "EQ", roff_EQ, NULL, NULL, 0, NULL },
                    529:        { "errprint", roff_line_ignore, NULL, NULL, 0, NULL },
                    530:        { "ev", roff_unsupp, NULL, NULL, 0, NULL },
                    531:        { "evc", roff_unsupp, NULL, NULL, 0, NULL },
                    532:        { "ex", roff_unsupp, NULL, NULL, 0, NULL },
                    533:        { "fallback", roff_line_ignore, NULL, NULL, 0, NULL },
1.185     schwarze  534:        { "fam", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  535:        { "fc", roff_unsupp, NULL, NULL, 0, NULL },
                    536:        { "fchar", roff_unsupp, NULL, NULL, 0, NULL },
                    537:        { "fcolor", roff_line_ignore, NULL, NULL, 0, NULL },
                    538:        { "fdeferlig", roff_line_ignore, NULL, NULL, 0, NULL },
                    539:        { "feature", roff_line_ignore, NULL, NULL, 0, NULL },
                    540:        { "fkern", roff_line_ignore, NULL, NULL, 0, NULL },
                    541:        { "fl", roff_line_ignore, NULL, NULL, 0, NULL },
                    542:        { "flig", roff_line_ignore, NULL, NULL, 0, NULL },
                    543:        { "fp", roff_line_ignore, NULL, NULL, 0, NULL },
                    544:        { "fps", roff_line_ignore, NULL, NULL, 0, NULL },
                    545:        { "fschar", roff_unsupp, NULL, NULL, 0, NULL },
                    546:        { "fspacewidth", roff_line_ignore, NULL, NULL, 0, NULL },
                    547:        { "fspecial", roff_line_ignore, NULL, NULL, 0, NULL },
                    548:        { "ftr", roff_line_ignore, NULL, NULL, 0, NULL },
                    549:        { "fzoom", roff_line_ignore, NULL, NULL, 0, NULL },
                    550:        { "gcolor", roff_line_ignore, NULL, NULL, 0, NULL },
                    551:        { "hc", roff_line_ignore, NULL, NULL, 0, NULL },
                    552:        { "hcode", roff_line_ignore, NULL, NULL, 0, NULL },
                    553:        { "hidechar", roff_line_ignore, NULL, NULL, 0, NULL },
                    554:        { "hla", roff_line_ignore, NULL, NULL, 0, NULL },
                    555:        { "hlm", roff_line_ignore, NULL, NULL, 0, NULL },
                    556:        { "hpf", roff_line_ignore, NULL, NULL, 0, NULL },
                    557:        { "hpfa", roff_line_ignore, NULL, NULL, 0, NULL },
                    558:        { "hpfcode", roff_line_ignore, NULL, NULL, 0, NULL },
1.186     schwarze  559:        { "hw", roff_line_ignore, NULL, NULL, 0, NULL },
1.103     kristaps  560:        { "hy", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  561:        { "hylang", roff_line_ignore, NULL, NULL, 0, NULL },
                    562:        { "hylen", roff_line_ignore, NULL, NULL, 0, NULL },
                    563:        { "hym", roff_line_ignore, NULL, NULL, 0, NULL },
                    564:        { "hypp", roff_line_ignore, NULL, NULL, 0, NULL },
                    565:        { "hys", roff_line_ignore, NULL, NULL, 0, NULL },
1.85      kristaps  566:        { "ie", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
                    567:        { "if", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
                    568:        { "ig", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.251     schwarze  569:        { "index", roff_unsupp, NULL, NULL, 0, NULL },
1.178     schwarze  570:        { "it", roff_it, NULL, NULL, 0, NULL },
1.251     schwarze  571:        { "itc", roff_unsupp, NULL, NULL, 0, NULL },
                    572:        { "IX", roff_line_ignore, NULL, NULL, 0, NULL },
                    573:        { "kern", roff_line_ignore, NULL, NULL, 0, NULL },
                    574:        { "kernafter", roff_line_ignore, NULL, NULL, 0, NULL },
                    575:        { "kernbefore", roff_line_ignore, NULL, NULL, 0, NULL },
                    576:        { "kernpair", roff_line_ignore, NULL, NULL, 0, NULL },
                    577:        { "lc", roff_unsupp, NULL, NULL, 0, NULL },
                    578:        { "lc_ctype", roff_unsupp, NULL, NULL, 0, NULL },
                    579:        { "lds", roff_unsupp, NULL, NULL, 0, NULL },
                    580:        { "length", roff_unsupp, NULL, NULL, 0, NULL },
                    581:        { "letadj", roff_line_ignore, NULL, NULL, 0, NULL },
                    582:        { "lf", roff_insec, NULL, NULL, 0, NULL },
                    583:        { "lg", roff_line_ignore, NULL, NULL, 0, NULL },
                    584:        { "lhang", roff_line_ignore, NULL, NULL, 0, NULL },
                    585:        { "linetabs", roff_unsupp, NULL, NULL, 0, NULL },
                    586:        { "lnr", roff_unsupp, NULL, NULL, 0, NULL },
                    587:        { "lnrf", roff_unsupp, NULL, NULL, 0, NULL },
                    588:        { "lpfx", roff_unsupp, NULL, NULL, 0, NULL },
                    589:        { "ls", roff_line_ignore, NULL, NULL, 0, NULL },
                    590:        { "lsm", roff_unsupp, NULL, NULL, 0, NULL },
                    591:        { "lt", roff_line_ignore, NULL, NULL, 0, NULL },
                    592:        { "mc", roff_line_ignore, NULL, NULL, 0, NULL },
                    593:        { "mediasize", roff_line_ignore, NULL, NULL, 0, NULL },
                    594:        { "minss", roff_line_ignore, NULL, NULL, 0, NULL },
                    595:        { "mk", roff_line_ignore, NULL, NULL, 0, NULL },
                    596:        { "mso", roff_insec, NULL, NULL, 0, NULL },
1.256     schwarze  597:        { "na", roff_line_ignore, NULL, NULL, 0, NULL },
1.103     kristaps  598:        { "ne", roff_line_ignore, NULL, NULL, 0, NULL },
                    599:        { "nh", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  600:        { "nhychar", roff_line_ignore, NULL, NULL, 0, NULL },
                    601:        { "nm", roff_unsupp, NULL, NULL, 0, NULL },
                    602:        { "nn", roff_unsupp, NULL, NULL, 0, NULL },
                    603:        { "nop", roff_unsupp, NULL, NULL, 0, NULL },
1.104     kristaps  604:        { "nr", roff_nr, NULL, NULL, 0, NULL },
1.251     schwarze  605:        { "nrf", roff_unsupp, NULL, NULL, 0, NULL },
                    606:        { "nroff", roff_line_ignore, NULL, NULL, 0, NULL },
1.124     schwarze  607:        { "ns", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  608:        { "nx", roff_insec, NULL, NULL, 0, NULL },
                    609:        { "open", roff_insec, NULL, NULL, 0, NULL },
                    610:        { "opena", roff_insec, NULL, NULL, 0, NULL },
                    611:        { "os", roff_line_ignore, NULL, NULL, 0, NULL },
                    612:        { "output", roff_unsupp, NULL, NULL, 0, NULL },
                    613:        { "padj", roff_line_ignore, NULL, NULL, 0, NULL },
                    614:        { "papersize", roff_line_ignore, NULL, NULL, 0, NULL },
                    615:        { "pc", roff_line_ignore, NULL, NULL, 0, NULL },
                    616:        { "pev", roff_line_ignore, NULL, NULL, 0, NULL },
                    617:        { "pi", roff_insec, NULL, NULL, 0, NULL },
                    618:        { "PI", roff_unsupp, NULL, NULL, 0, NULL },
1.229     schwarze  619:        { "pl", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  620:        { "pm", roff_line_ignore, NULL, NULL, 0, NULL },
                    621:        { "pn", roff_line_ignore, NULL, NULL, 0, NULL },
                    622:        { "pnr", roff_line_ignore, NULL, NULL, 0, NULL },
                    623:        { "po", roff_line_ignore, NULL, NULL, 0, NULL },
1.124     schwarze  624:        { "ps", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  625:        { "psbb", roff_unsupp, NULL, NULL, 0, NULL },
1.255     schwarze  626:        { "pshape", roff_unsupp, NULL, NULL, 0, NULL },
1.251     schwarze  627:        { "pso", roff_insec, NULL, NULL, 0, NULL },
                    628:        { "ptr", roff_line_ignore, NULL, NULL, 0, NULL },
                    629:        { "pvs", roff_line_ignore, NULL, NULL, 0, NULL },
                    630:        { "rchar", roff_unsupp, NULL, NULL, 0, NULL },
                    631:        { "rd", roff_line_ignore, NULL, NULL, 0, NULL },
                    632:        { "recursionlimit", roff_line_ignore, NULL, NULL, 0, NULL },
                    633:        { "return", roff_unsupp, NULL, NULL, 0, NULL },
                    634:        { "rfschar", roff_unsupp, NULL, NULL, 0, NULL },
                    635:        { "rhang", roff_line_ignore, NULL, NULL, 0, NULL },
                    636:        { "rj", roff_line_ignore, NULL, NULL, 0, NULL },
1.122     schwarze  637:        { "rm", roff_rm, NULL, NULL, 0, NULL },
1.251     schwarze  638:        { "rn", roff_unsupp, NULL, NULL, 0, NULL },
                    639:        { "rnn", roff_unsupp, NULL, NULL, 0, NULL },
1.203     schwarze  640:        { "rr", roff_rr, NULL, NULL, 0, NULL },
1.251     schwarze  641:        { "rs", roff_line_ignore, NULL, NULL, 0, NULL },
                    642:        { "rt", roff_line_ignore, NULL, NULL, 0, NULL },
                    643:        { "schar", roff_unsupp, NULL, NULL, 0, NULL },
                    644:        { "sentchar", roff_line_ignore, NULL, NULL, 0, NULL },
                    645:        { "shc", roff_line_ignore, NULL, NULL, 0, NULL },
                    646:        { "shift", roff_unsupp, NULL, NULL, 0, NULL },
                    647:        { "sizes", roff_line_ignore, NULL, NULL, 0, NULL },
1.105     kristaps  648:        { "so", roff_so, NULL, NULL, 0, NULL },
1.251     schwarze  649:        { "spacewidth", roff_line_ignore, NULL, NULL, 0, NULL },
                    650:        { "special", roff_line_ignore, NULL, NULL, 0, NULL },
                    651:        { "spreadwarn", roff_line_ignore, NULL, NULL, 0, NULL },
                    652:        { "ss", roff_line_ignore, NULL, NULL, 0, NULL },
                    653:        { "sty", roff_line_ignore, NULL, NULL, 0, NULL },
                    654:        { "substring", roff_unsupp, NULL, NULL, 0, NULL },
                    655:        { "sv", roff_line_ignore, NULL, NULL, 0, NULL },
                    656:        { "sy", roff_insec, NULL, NULL, 0, NULL },
                    657:        { "T&", roff_T_, NULL, NULL, 0, NULL },
1.255     schwarze  658:        { "ta", roff_unsupp, NULL, NULL, 0, NULL },
1.251     schwarze  659:        { "tc", roff_unsupp, NULL, NULL, 0, NULL },
                    660:        { "TE", roff_TE, NULL, NULL, 0, NULL },
                    661:        { "TH", roff_TH, NULL, NULL, 0, NULL },
1.255     schwarze  662:        { "ti", roff_unsupp, NULL, NULL, 0, NULL },
1.251     schwarze  663:        { "tkf", roff_line_ignore, NULL, NULL, 0, NULL },
                    664:        { "tl", roff_unsupp, NULL, NULL, 0, NULL },
                    665:        { "tm", roff_line_ignore, NULL, NULL, 0, NULL },
                    666:        { "tm1", roff_line_ignore, NULL, NULL, 0, NULL },
                    667:        { "tmc", roff_line_ignore, NULL, NULL, 0, NULL },
1.164     kristaps  668:        { "tr", roff_tr, NULL, NULL, 0, NULL },
1.251     schwarze  669:        { "track", roff_line_ignore, NULL, NULL, 0, NULL },
                    670:        { "transchar", roff_line_ignore, NULL, NULL, 0, NULL },
                    671:        { "trf", roff_insec, NULL, NULL, 0, NULL },
                    672:        { "trimat", roff_line_ignore, NULL, NULL, 0, NULL },
                    673:        { "trin", roff_unsupp, NULL, NULL, 0, NULL },
                    674:        { "trnt", roff_unsupp, NULL, NULL, 0, NULL },
                    675:        { "troff", roff_line_ignore, NULL, NULL, 0, NULL },
1.109     kristaps  676:        { "TS", roff_TS, NULL, NULL, 0, NULL },
1.251     schwarze  677:        { "uf", roff_line_ignore, NULL, NULL, 0, NULL },
                    678:        { "ul", roff_line_ignore, NULL, NULL, 0, NULL },
                    679:        { "unformat", roff_unsupp, NULL, NULL, 0, NULL },
                    680:        { "unwatch", roff_line_ignore, NULL, NULL, 0, NULL },
                    681:        { "unwatchn", roff_line_ignore, NULL, NULL, 0, NULL },
                    682:        { "vpt", roff_line_ignore, NULL, NULL, 0, NULL },
                    683:        { "vs", roff_line_ignore, NULL, NULL, 0, NULL },
                    684:        { "warn", roff_line_ignore, NULL, NULL, 0, NULL },
                    685:        { "warnscale", roff_line_ignore, NULL, NULL, 0, NULL },
                    686:        { "watch", roff_line_ignore, NULL, NULL, 0, NULL },
                    687:        { "watchlength", roff_line_ignore, NULL, NULL, 0, NULL },
                    688:        { "watchn", roff_line_ignore, NULL, NULL, 0, NULL },
                    689:        { "wh", roff_unsupp, NULL, NULL, 0, NULL },
                    690:        { "while", roff_unsupp, NULL, NULL, 0, NULL },
                    691:        { "write", roff_insec, NULL, NULL, 0, NULL },
                    692:        { "writec", roff_insec, NULL, NULL, 0, NULL },
                    693:        { "writem", roff_insec, NULL, NULL, 0, NULL },
                    694:        { "xflag", roff_line_ignore, NULL, NULL, 0, NULL },
1.85      kristaps  695:        { ".", roff_cblock, NULL, NULL, 0, NULL },
1.106     kristaps  696:        { NULL, roff_userdef, NULL, NULL, 0, NULL },
1.67      kristaps  697: };
                    698:
1.200     schwarze  699: /* not currently implemented: Ds em Eq LP Me PP pp Or Rd Sf SH */
1.175     schwarze  700: const  char *const __mdoc_reserved[] = {
                    701:        "Ac", "Ad", "An", "Ao", "Ap", "Aq", "Ar", "At",
                    702:        "Bc", "Bd", "Bf", "Bk", "Bl", "Bo", "Bq",
                    703:        "Brc", "Bro", "Brq", "Bsx", "Bt", "Bx",
                    704:        "Cd", "Cm", "Db", "Dc", "Dd", "Dl", "Do", "Dq",
1.200     schwarze  705:        "Dt", "Dv", "Dx", "D1",
                    706:        "Ec", "Ed", "Ef", "Ek", "El", "Em",
                    707:        "En", "Eo", "Er", "Es", "Ev", "Ex",
1.175     schwarze  708:        "Fa", "Fc", "Fd", "Fl", "Fn", "Fo", "Fr", "Ft", "Fx",
1.200     schwarze  709:        "Hf", "Ic", "In", "It", "Lb", "Li", "Lk", "Lp",
                    710:        "Ms", "Mt", "Nd", "Nm", "No", "Ns", "Nx",
1.175     schwarze  711:        "Oc", "Oo", "Op", "Os", "Ot", "Ox",
1.200     schwarze  712:        "Pa", "Pc", "Pf", "Po", "Pp", "Pq",
                    713:        "Qc", "Ql", "Qo", "Qq", "Re", "Rs", "Rv",
                    714:        "Sc", "Sh", "Sm", "So", "Sq",
1.175     schwarze  715:        "Ss", "St", "Sx", "Sy",
                    716:        "Ta", "Tn", "Ud", "Ux", "Va", "Vt", "Xc", "Xo", "Xr",
1.200     schwarze  717:        "%A", "%B", "%C", "%D", "%I", "%J", "%N", "%O",
1.175     schwarze  718:        "%P", "%Q", "%R", "%T", "%U", "%V",
                    719:        NULL
                    720: };
                    721:
1.200     schwarze  722: /* not currently implemented: BT DE DS ME MT PT SY TQ YS */
1.175     schwarze  723: const  char *const __man_reserved[] = {
1.200     schwarze  724:        "AT", "B", "BI", "BR", "DT",
                    725:        "EE", "EN", "EQ", "EX", "HP", "I", "IB", "IP", "IR",
                    726:        "LP", "OP", "P", "PD", "PP",
                    727:        "R", "RB", "RE", "RI", "RS", "SB", "SH", "SM", "SS",
                    728:        "TE", "TH", "TP", "TS", "T&", "UC", "UE", "UR",
1.175     schwarze  729:        NULL
                    730: };
                    731:
1.141     kristaps  732: /* Array of injected predefined strings. */
                    733: #define        PREDEFS_MAX      38
                    734: static const struct predef predefs[PREDEFS_MAX] = {
                    735: #include "predefs.in"
                    736: };
                    737:
1.155     kristaps  738: /* See roffhash_find() */
1.85      kristaps  739: #define        ROFF_HASH(p)    (p[0] - ASCII_LO)
                    740:
1.178     schwarze  741: static int      roffit_lines;  /* number of lines to delay */
                    742: static char    *roffit_macro;  /* nil-terminated macro line */
                    743:
1.207     schwarze  744:
1.266     schwarze  745: /* --- request table ------------------------------------------------------ */
                    746:
1.85      kristaps  747: static void
1.155     kristaps  748: roffhash_init(void)
1.85      kristaps  749: {
                    750:        struct roffmac   *n;
                    751:        int               buc, i;
                    752:
1.106     kristaps  753:        for (i = 0; i < (int)ROFF_USERDEF; i++) {
1.85      kristaps  754:                assert(roffs[i].name[0] >= ASCII_LO);
                    755:                assert(roffs[i].name[0] <= ASCII_HI);
                    756:
                    757:                buc = ROFF_HASH(roffs[i].name);
                    758:
                    759:                if (NULL != (n = hash[buc])) {
                    760:                        for ( ; n->next; n = n->next)
                    761:                                /* Do nothing. */ ;
                    762:                        n->next = &roffs[i];
                    763:                } else
                    764:                        hash[buc] = &roffs[i];
                    765:        }
                    766: }
                    767:
1.67      kristaps  768: /*
                    769:  * Look up a roff token by its name.  Returns ROFF_MAX if no macro by
                    770:  * the nil-terminated string name could be found.
                    771:  */
                    772: static enum rofft
1.155     kristaps  773: roffhash_find(const char *p, size_t s)
1.67      kristaps  774: {
1.85      kristaps  775:        int              buc;
                    776:        struct roffmac  *n;
1.67      kristaps  777:
1.85      kristaps  778:        /*
                    779:         * libroff has an extremely simple hashtable, for the time
                    780:         * being, which simply keys on the first character, which must
                    781:         * be printable, then walks a chain.  It works well enough until
                    782:         * optimised.
                    783:         */
                    784:
                    785:        if (p[0] < ASCII_LO || p[0] > ASCII_HI)
                    786:                return(ROFF_MAX);
                    787:
                    788:        buc = ROFF_HASH(p);
                    789:
                    790:        if (NULL == (n = hash[buc]))
                    791:                return(ROFF_MAX);
                    792:        for ( ; n; n = n->next)
1.106     kristaps  793:                if (0 == strncmp(n->name, p, s) && '\0' == n->name[(int)s])
1.85      kristaps  794:                        return((enum rofft)(n - roffs));
1.67      kristaps  795:
                    796:        return(ROFF_MAX);
                    797: }
                    798:
1.266     schwarze  799: /* --- stack of request blocks -------------------------------------------- */
                    800:
1.67      kristaps  801: /*
                    802:  * Pop the current node off of the stack of roff instructions currently
                    803:  * pending.
                    804:  */
                    805: static void
                    806: roffnode_pop(struct roff *r)
                    807: {
                    808:        struct roffnode *p;
                    809:
1.75      kristaps  810:        assert(r->last);
1.207     schwarze  811:        p = r->last;
1.82      kristaps  812:
1.75      kristaps  813:        r->last = r->last->parent;
1.106     kristaps  814:        free(p->name);
                    815:        free(p->end);
1.67      kristaps  816:        free(p);
                    817: }
                    818:
                    819: /*
                    820:  * Push a roff node onto the instruction stack.  This must later be
                    821:  * removed with roffnode_pop().
                    822:  */
1.98      schwarze  823: static void
1.106     kristaps  824: roffnode_push(struct roff *r, enum rofft tok, const char *name,
                    825:                int line, int col)
1.67      kristaps  826: {
                    827:        struct roffnode *p;
                    828:
1.98      schwarze  829:        p = mandoc_calloc(1, sizeof(struct roffnode));
1.67      kristaps  830:        p->tok = tok;
1.106     kristaps  831:        if (name)
                    832:                p->name = mandoc_strdup(name);
1.67      kristaps  833:        p->parent = r->last;
                    834:        p->line = line;
                    835:        p->col = col;
1.198     schwarze  836:        p->rule = p->parent ? p->parent->rule : 0;
1.67      kristaps  837:
                    838:        r->last = p;
                    839: }
                    840:
1.266     schwarze  841: /* --- roff parser state data management ---------------------------------- */
                    842:
1.67      kristaps  843: static void
                    844: roff_free1(struct roff *r)
                    845: {
1.176     schwarze  846:        struct tbl_node *tbl;
1.125     kristaps  847:        struct eqn_node *e;
1.167     kristaps  848:        int              i;
1.67      kristaps  849:
1.176     schwarze  850:        while (NULL != (tbl = r->first_tbl)) {
                    851:                r->first_tbl = tbl->next;
                    852:                tbl_free(tbl);
1.109     kristaps  853:        }
1.113     kristaps  854:        r->first_tbl = r->last_tbl = r->tbl = NULL;
                    855:
1.125     kristaps  856:        while (NULL != (e = r->first_eqn)) {
                    857:                r->first_eqn = e->next;
                    858:                eqn_free(e);
                    859:        }
                    860:        r->first_eqn = r->last_eqn = r->eqn = NULL;
                    861:
1.67      kristaps  862:        while (r->last)
                    863:                roffnode_pop(r);
1.109     kristaps  864:
1.223     schwarze  865:        free (r->rstack);
                    866:        r->rstack = NULL;
                    867:        r->rstacksz = 0;
                    868:        r->rstackpos = -1;
                    869:
                    870:        roff_freereg(r->regtab);
                    871:        r->regtab = NULL;
                    872:
1.167     kristaps  873:        roff_freestr(r->strtab);
                    874:        roff_freestr(r->xmbtab);
                    875:        r->strtab = r->xmbtab = NULL;
                    876:
                    877:        if (r->xtab)
                    878:                for (i = 0; i < 128; i++)
                    879:                        free(r->xtab[i].p);
                    880:        free(r->xtab);
                    881:        r->xtab = NULL;
1.67      kristaps  882: }
                    883:
                    884: void
                    885: roff_reset(struct roff *r)
                    886: {
                    887:
                    888:        roff_free1(r);
1.227     schwarze  889:        r->format = r->options & (MPARSE_MDOC | MPARSE_MAN);
1.174     kristaps  890:        r->control = 0;
1.67      kristaps  891: }
                    892:
                    893: void
                    894: roff_free(struct roff *r)
                    895: {
                    896:
                    897:        roff_free1(r);
                    898:        free(r);
                    899: }
                    900:
                    901: struct roff *
1.237     schwarze  902: roff_alloc(struct mparse *parse, const struct mchars *mchars, int options)
1.67      kristaps  903: {
                    904:        struct roff     *r;
                    905:
1.98      schwarze  906:        r = mandoc_calloc(1, sizeof(struct roff));
1.128     kristaps  907:        r->parse = parse;
1.237     schwarze  908:        r->mchars = mchars;
1.199     schwarze  909:        r->options = options;
1.227     schwarze  910:        r->format = options & (MPARSE_MDOC | MPARSE_MAN);
1.82      kristaps  911:        r->rstackpos = -1;
1.207     schwarze  912:
1.155     kristaps  913:        roffhash_init();
1.141     kristaps  914:
1.67      kristaps  915:        return(r);
1.265     schwarze  916: }
                    917:
1.266     schwarze  918: /* --- syntax tree state data management ---------------------------------- */
                    919:
1.265     schwarze  920: static void
                    921: roff_man_free1(struct roff_man *man)
                    922: {
                    923:
1.266     schwarze  924:        if (man->first != NULL)
                    925:                roff_node_delete(man, man->first);
1.265     schwarze  926:        free(man->meta.msec);
                    927:        free(man->meta.vol);
                    928:        free(man->meta.os);
                    929:        free(man->meta.arch);
                    930:        free(man->meta.title);
                    931:        free(man->meta.name);
                    932:        free(man->meta.date);
                    933: }
                    934:
                    935: static void
                    936: roff_man_alloc1(struct roff_man *man)
                    937: {
                    938:
                    939:        memset(&man->meta, 0, sizeof(man->meta));
                    940:        man->first = mandoc_calloc(1, sizeof(*man->first));
                    941:        man->first->type = ROFFT_ROOT;
                    942:        man->last = man->first;
                    943:        man->last_es = NULL;
                    944:        man->flags = 0;
                    945:        man->macroset = MACROSET_NONE;
                    946:        man->lastsec = man->lastnamed = SEC_NONE;
                    947:        man->next = ROFF_NEXT_CHILD;
                    948: }
                    949:
                    950: void
                    951: roff_man_reset(struct roff_man *man)
                    952: {
                    953:
                    954:        roff_man_free1(man);
                    955:        roff_man_alloc1(man);
                    956: }
                    957:
                    958: void
                    959: roff_man_free(struct roff_man *man)
                    960: {
                    961:
                    962:        roff_man_free1(man);
                    963:        free(man);
                    964: }
                    965:
                    966: struct roff_man *
                    967: roff_man_alloc(struct roff *roff, struct mparse *parse,
                    968:        const char *defos, int quick)
                    969: {
                    970:        struct roff_man *man;
                    971:
                    972:        man = mandoc_calloc(1, sizeof(*man));
                    973:        man->parse = parse;
                    974:        man->roff = roff;
                    975:        man->defos = defos;
                    976:        man->quick = quick;
                    977:        roff_man_alloc1(man);
                    978:        return(man);
1.67      kristaps  979: }
                    980:
1.266     schwarze  981: /* --- syntax tree handling ----------------------------------------------- */
                    982:
                    983: struct roff_node *
                    984: roff_node_alloc(struct roff_man *man, int line, int pos,
                    985:        enum roff_type type, int tok)
                    986: {
                    987:        struct roff_node        *n;
                    988:
                    989:        n = mandoc_calloc(1, sizeof(*n));
                    990:        n->line = line;
                    991:        n->pos = pos;
                    992:        n->tok = tok;
                    993:        n->type = type;
                    994:        n->sec = man->lastsec;
                    995:
                    996:        if (man->flags & MDOC_SYNOPSIS)
                    997:                n->flags |= MDOC_SYNPRETTY;
                    998:        else
                    999:                n->flags &= ~MDOC_SYNPRETTY;
                   1000:        if (man->flags & MDOC_NEWLINE)
                   1001:                n->flags |= MDOC_LINE;
                   1002:        man->flags &= ~MDOC_NEWLINE;
                   1003:
                   1004:        return(n);
                   1005: }
                   1006:
                   1007: void
                   1008: roff_node_append(struct roff_man *man, struct roff_node *n)
                   1009: {
                   1010:
                   1011:        switch (man->next) {
                   1012:        case ROFF_NEXT_SIBLING:
                   1013:                man->last->next = n;
                   1014:                n->prev = man->last;
                   1015:                n->parent = man->last->parent;
                   1016:                break;
                   1017:        case ROFF_NEXT_CHILD:
                   1018:                man->last->child = n;
                   1019:                n->parent = man->last;
                   1020:                break;
                   1021:        default:
                   1022:                abort();
                   1023:                /* NOTREACHED */
                   1024:        }
                   1025:        n->parent->nchild++;
1.270     schwarze 1026:        n->parent->last = n;
1.266     schwarze 1027:
                   1028:        /*
                   1029:         * Copy over the normalised-data pointer of our parent.  Not
                   1030:         * everybody has one, but copying a null pointer is fine.
                   1031:         */
                   1032:
                   1033:        switch (n->type) {
                   1034:        case ROFFT_BODY:
                   1035:                if (n->end != ENDBODY_NOT)
                   1036:                        break;
                   1037:                /* FALLTHROUGH */
                   1038:        case ROFFT_TAIL:
                   1039:                /* FALLTHROUGH */
                   1040:        case ROFFT_HEAD:
                   1041:                n->norm = n->parent->norm;
                   1042:                break;
                   1043:        default:
                   1044:                break;
                   1045:        }
                   1046:
                   1047:        if (man->macroset == MACROSET_MDOC)
                   1048:                mdoc_valid_pre(man, n);
                   1049:
                   1050:        switch (n->type) {
                   1051:        case ROFFT_HEAD:
                   1052:                assert(n->parent->type == ROFFT_BLOCK);
                   1053:                n->parent->head = n;
                   1054:                break;
                   1055:        case ROFFT_BODY:
                   1056:                if (n->end)
                   1057:                        break;
                   1058:                assert(n->parent->type == ROFFT_BLOCK);
                   1059:                n->parent->body = n;
                   1060:                break;
                   1061:        case ROFFT_TAIL:
                   1062:                assert(n->parent->type == ROFFT_BLOCK);
                   1063:                n->parent->tail = n;
                   1064:                break;
                   1065:        default:
                   1066:                break;
                   1067:        }
                   1068:        man->last = n;
                   1069: }
                   1070:
1.267     schwarze 1071: void
                   1072: roff_word_alloc(struct roff_man *man, int line, int pos, const char *word)
                   1073: {
                   1074:        struct roff_node        *n;
                   1075:
                   1076:        n = roff_node_alloc(man, line, pos, ROFFT_TEXT, TOKEN_NONE);
                   1077:        n->string = roff_strdup(man->roff, word);
                   1078:        roff_node_append(man, n);
                   1079:        if (man->macroset == MACROSET_MDOC)
                   1080:                mdoc_valid_post(man);
                   1081:        else
                   1082:                man_valid_post(man);
                   1083:        man->next = ROFF_NEXT_SIBLING;
                   1084: }
                   1085:
                   1086: void
                   1087: roff_word_append(struct roff_man *man, const char *word)
                   1088: {
                   1089:        struct roff_node        *n;
                   1090:        char                    *addstr, *newstr;
                   1091:
                   1092:        n = man->last;
                   1093:        addstr = roff_strdup(man->roff, word);
                   1094:        mandoc_asprintf(&newstr, "%s %s", n->string, addstr);
                   1095:        free(addstr);
                   1096:        free(n->string);
                   1097:        n->string = newstr;
                   1098:        man->next = ROFF_NEXT_SIBLING;
1.268     schwarze 1099: }
                   1100:
                   1101: void
                   1102: roff_elem_alloc(struct roff_man *man, int line, int pos, int tok)
                   1103: {
                   1104:        struct roff_node        *n;
                   1105:
                   1106:        n = roff_node_alloc(man, line, pos, ROFFT_ELEM, tok);
                   1107:        roff_node_append(man, n);
                   1108:        man->next = ROFF_NEXT_CHILD;
                   1109: }
                   1110:
                   1111: struct roff_node *
                   1112: roff_block_alloc(struct roff_man *man, int line, int pos, int tok)
                   1113: {
                   1114:        struct roff_node        *n;
                   1115:
                   1116:        n = roff_node_alloc(man, line, pos, ROFFT_BLOCK, tok);
                   1117:        roff_node_append(man, n);
                   1118:        man->next = ROFF_NEXT_CHILD;
                   1119:        return(n);
1.267     schwarze 1120: }
                   1121:
1.266     schwarze 1122: struct roff_node *
                   1123: roff_head_alloc(struct roff_man *man, int line, int pos, int tok)
                   1124: {
                   1125:        struct roff_node        *n;
                   1126:
                   1127:        n = roff_node_alloc(man, line, pos, ROFFT_HEAD, tok);
                   1128:        roff_node_append(man, n);
                   1129:        man->next = ROFF_NEXT_CHILD;
                   1130:        return(n);
                   1131: }
                   1132:
                   1133: struct roff_node *
                   1134: roff_body_alloc(struct roff_man *man, int line, int pos, int tok)
                   1135: {
                   1136:        struct roff_node        *n;
                   1137:
                   1138:        n = roff_node_alloc(man, line, pos, ROFFT_BODY, tok);
                   1139:        roff_node_append(man, n);
                   1140:        man->next = ROFF_NEXT_CHILD;
                   1141:        return(n);
1.267     schwarze 1142: }
                   1143:
                   1144: void
                   1145: roff_addeqn(struct roff_man *man, const struct eqn *eqn)
                   1146: {
                   1147:        struct roff_node        *n;
                   1148:
                   1149:        n = roff_node_alloc(man, eqn->ln, eqn->pos, ROFFT_EQN, TOKEN_NONE);
                   1150:        n->eqn = eqn;
                   1151:        if (eqn->ln > man->last->line)
                   1152:                n->flags |= MDOC_LINE;
                   1153:        roff_node_append(man, n);
                   1154:        man->next = ROFF_NEXT_SIBLING;
                   1155: }
                   1156:
                   1157: void
                   1158: roff_addtbl(struct roff_man *man, const struct tbl_span *tbl)
                   1159: {
                   1160:        struct roff_node        *n;
                   1161:
                   1162:        if (man->macroset == MACROSET_MAN)
                   1163:                man_breakscope(man, TOKEN_NONE);
                   1164:        n = roff_node_alloc(man, tbl->line, 0, ROFFT_TBL, TOKEN_NONE);
                   1165:        n->span = tbl;
                   1166:        roff_node_append(man, n);
                   1167:        if (man->macroset == MACROSET_MDOC)
                   1168:                mdoc_valid_post(man);
                   1169:        else
                   1170:                man_valid_post(man);
                   1171:        man->next = ROFF_NEXT_SIBLING;
1.266     schwarze 1172: }
                   1173:
                   1174: void
                   1175: roff_node_unlink(struct roff_man *man, struct roff_node *n)
                   1176: {
                   1177:
                   1178:        /* Adjust siblings. */
                   1179:
                   1180:        if (n->prev)
                   1181:                n->prev->next = n->next;
                   1182:        if (n->next)
                   1183:                n->next->prev = n->prev;
                   1184:
                   1185:        /* Adjust parent. */
                   1186:
                   1187:        if (n->parent != NULL) {
                   1188:                n->parent->nchild--;
                   1189:                if (n->parent->child == n)
                   1190:                        n->parent->child = n->next;
                   1191:                if (n->parent->last == n)
                   1192:                        n->parent->last = n->prev;
                   1193:        }
                   1194:
                   1195:        /* Adjust parse point. */
                   1196:
                   1197:        if (man == NULL)
                   1198:                return;
                   1199:        if (man->last == n) {
                   1200:                if (n->prev == NULL) {
                   1201:                        man->last = n->parent;
                   1202:                        man->next = ROFF_NEXT_CHILD;
                   1203:                } else {
                   1204:                        man->last = n->prev;
                   1205:                        man->next = ROFF_NEXT_SIBLING;
                   1206:                }
                   1207:        }
                   1208:        if (man->first == n)
                   1209:                man->first = NULL;
                   1210: }
                   1211:
                   1212: void
                   1213: roff_node_free(struct roff_node *n)
                   1214: {
                   1215:
                   1216:        if (n->args != NULL)
                   1217:                mdoc_argv_free(n->args);
                   1218:        if (n->type == ROFFT_BLOCK || n->type == ROFFT_ELEM)
                   1219:                free(n->norm);
                   1220:        free(n->string);
                   1221:        free(n);
                   1222: }
                   1223:
                   1224: void
                   1225: roff_node_delete(struct roff_man *man, struct roff_node *n)
                   1226: {
                   1227:
                   1228:        while (n->child != NULL)
                   1229:                roff_node_delete(man, n->child);
                   1230:        assert(n->nchild == 0);
                   1231:        roff_node_unlink(man, n);
                   1232:        roff_node_free(n);
1.269     schwarze 1233: }
                   1234:
                   1235: void
                   1236: deroff(char **dest, const struct roff_node *n)
                   1237: {
                   1238:        char    *cp;
                   1239:        size_t   sz;
                   1240:
                   1241:        if (n->type != ROFFT_TEXT) {
                   1242:                for (n = n->child; n != NULL; n = n->next)
                   1243:                        deroff(dest, n);
                   1244:                return;
                   1245:        }
                   1246:
                   1247:        /* Skip leading whitespace and escape sequences. */
                   1248:
                   1249:        cp = n->string;
                   1250:        while (*cp != '\0') {
                   1251:                if ('\\' == *cp) {
                   1252:                        cp++;
                   1253:                        mandoc_escape((const char **)&cp, NULL, NULL);
                   1254:                } else if (isspace((unsigned char)*cp))
                   1255:                        cp++;
                   1256:                else
                   1257:                        break;
                   1258:        }
                   1259:
                   1260:        /* Skip trailing whitespace. */
                   1261:
                   1262:        for (sz = strlen(cp); sz; sz--)
                   1263:                if ( ! isspace((unsigned char)cp[sz-1]))
                   1264:                        break;
                   1265:
                   1266:        /* Skip empty strings. */
                   1267:
                   1268:        if (sz == 0)
                   1269:                return;
                   1270:
                   1271:        if (*dest == NULL) {
                   1272:                *dest = mandoc_strndup(cp, sz);
                   1273:                return;
                   1274:        }
                   1275:
                   1276:        mandoc_asprintf(&cp, "%s %*s", *dest, (int)sz, cp);
                   1277:        free(*dest);
                   1278:        *dest = cp;
1.266     schwarze 1279: }
                   1280:
                   1281: /* --- main functions of the roff parser ---------------------------------- */
                   1282:
1.94      kristaps 1283: /*
1.206     schwarze 1284:  * In the current line, expand escape sequences that tend to get
                   1285:  * used in numerical expressions and conditional requests.
                   1286:  * Also check the syntax of the remaining escape sequences.
1.154     kristaps 1287:  */
1.172     schwarze 1288: static enum rofferr
1.238     schwarze 1289: roff_res(struct roff *r, struct buf *buf, int ln, int pos)
1.94      kristaps 1290: {
1.208     schwarze 1291:        char             ubuf[24]; /* buffer to print the number */
1.205     schwarze 1292:        const char      *start; /* start of the string to process */
1.209     schwarze 1293:        char            *stesc; /* start of an escape sequence ('\\') */
1.108     schwarze 1294:        const char      *stnam; /* start of the name, after "[(*" */
                   1295:        const char      *cp;    /* end of the name, e.g. before ']' */
                   1296:        const char      *res;   /* the string to be substituted */
1.238     schwarze 1297:        char            *nbuf;  /* new buffer to copy buf->buf to */
1.181     schwarze 1298:        size_t           maxl;  /* expected length of the escape name */
                   1299:        size_t           naml;  /* actual length of the escape name */
1.237     schwarze 1300:        enum mandoc_esc  esc;   /* type of the escape sequence */
                   1301:        int              inaml; /* length returned from mandoc_escape() */
1.181     schwarze 1302:        int              expand_count;  /* to avoid infinite loops */
1.206     schwarze 1303:        int              npos;  /* position in numeric expression */
1.218     schwarze 1304:        int              arg_complete; /* argument not interrupted by eol */
1.206     schwarze 1305:        char             term;  /* character terminating the escape */
1.94      kristaps 1306:
1.170     schwarze 1307:        expand_count = 0;
1.238     schwarze 1308:        start = buf->buf + pos;
1.205     schwarze 1309:        stesc = strchr(start, '\0') - 1;
                   1310:        while (stesc-- > start) {
1.170     schwarze 1311:
1.205     schwarze 1312:                /* Search backwards for the next backslash. */
                   1313:
1.238     schwarze 1314:                if (*stesc != '\\')
1.205     schwarze 1315:                        continue;
                   1316:
                   1317:                /* If it is escaped, skip it. */
                   1318:
                   1319:                for (cp = stesc - 1; cp >= start; cp--)
1.238     schwarze 1320:                        if (*cp != '\\')
1.205     schwarze 1321:                                break;
                   1322:
1.238     schwarze 1323:                if ((stesc - cp) % 2 == 0) {
1.209     schwarze 1324:                        stesc = (char *)cp;
1.205     schwarze 1325:                        continue;
                   1326:                }
1.108     schwarze 1327:
1.206     schwarze 1328:                /* Decide whether to expand or to check only. */
1.108     schwarze 1329:
1.206     schwarze 1330:                term = '\0';
1.205     schwarze 1331:                cp = stesc + 1;
1.181     schwarze 1332:                switch (*cp) {
1.207     schwarze 1333:                case '*':
1.181     schwarze 1334:                        res = NULL;
                   1335:                        break;
1.207     schwarze 1336:                case 'B':
1.206     schwarze 1337:                        /* FALLTHROUGH */
1.207     schwarze 1338:                case 'w':
1.206     schwarze 1339:                        term = cp[1];
                   1340:                        /* FALLTHROUGH */
1.207     schwarze 1341:                case 'n':
1.181     schwarze 1342:                        res = ubuf;
                   1343:                        break;
                   1344:                default:
1.237     schwarze 1345:                        esc = mandoc_escape(&cp, &stnam, &inaml);
                   1346:                        if (esc == ESCAPE_ERROR ||
                   1347:                            (esc == ESCAPE_SPECIAL &&
                   1348:                             mchars_spec2cp(r->mchars, stnam, inaml) < 0))
1.219     schwarze 1349:                                mandoc_vmsg(MANDOCERR_ESC_BAD,
1.238     schwarze 1350:                                    r->parse, ln, (int)(stesc - buf->buf),
1.219     schwarze 1351:                                    "%.*s", (int)(cp - stesc), stesc);
1.205     schwarze 1352:                        continue;
1.152     kristaps 1353:                }
                   1354:
1.205     schwarze 1355:                if (EXPAND_LIMIT < ++expand_count) {
                   1356:                        mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
1.238     schwarze 1357:                            ln, (int)(stesc - buf->buf), NULL);
1.205     schwarze 1358:                        return(ROFF_IGN);
                   1359:                }
1.108     schwarze 1360:
                   1361:                /*
                   1362:                 * The third character decides the length
1.181     schwarze 1363:                 * of the name of the string or register.
1.108     schwarze 1364:                 * Save a pointer to the name.
                   1365:                 */
                   1366:
1.238     schwarze 1367:                if (term == '\0') {
1.206     schwarze 1368:                        switch (*++cp) {
1.207     schwarze 1369:                        case '\0':
1.206     schwarze 1370:                                maxl = 0;
                   1371:                                break;
1.207     schwarze 1372:                        case '(':
1.206     schwarze 1373:                                cp++;
                   1374:                                maxl = 2;
                   1375:                                break;
1.207     schwarze 1376:                        case '[':
1.206     schwarze 1377:                                cp++;
                   1378:                                term = ']';
                   1379:                                maxl = 0;
                   1380:                                break;
                   1381:                        default:
                   1382:                                maxl = 1;
                   1383:                                break;
                   1384:                        }
                   1385:                } else {
                   1386:                        cp += 2;
1.94      kristaps 1387:                        maxl = 0;
                   1388:                }
1.108     schwarze 1389:                stnam = cp;
1.94      kristaps 1390:
1.108     schwarze 1391:                /* Advance to the end of the name. */
1.94      kristaps 1392:
1.253     schwarze 1393:                naml = 0;
1.218     schwarze 1394:                arg_complete = 1;
1.253     schwarze 1395:                while (maxl == 0 || naml < maxl) {
1.238     schwarze 1396:                        if (*cp == '\0') {
1.219     schwarze 1397:                                mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238     schwarze 1398:                                    ln, (int)(stesc - buf->buf), stesc);
1.218     schwarze 1399:                                arg_complete = 0;
1.206     schwarze 1400:                                break;
1.153     kristaps 1401:                        }
1.238     schwarze 1402:                        if (maxl == 0 && *cp == term) {
1.206     schwarze 1403:                                cp++;
1.253     schwarze 1404:                                break;
                   1405:                        }
                   1406:                        if (*cp++ != '\\' || stesc[1] != 'w') {
                   1407:                                naml++;
                   1408:                                continue;
                   1409:                        }
                   1410:                        switch (mandoc_escape(&cp, NULL, NULL)) {
                   1411:                        case ESCAPE_SPECIAL:
                   1412:                                /* FALLTHROUGH */
                   1413:                        case ESCAPE_UNICODE:
                   1414:                                /* FALLTHROUGH */
                   1415:                        case ESCAPE_NUMBERED:
                   1416:                                /* FALLTHROUGH */
                   1417:                        case ESCAPE_OVERSTRIKE:
                   1418:                                naml++;
                   1419:                                break;
                   1420:                        default:
1.94      kristaps 1421:                                break;
1.206     schwarze 1422:                        }
1.94      kristaps 1423:                }
                   1424:
1.108     schwarze 1425:                /*
                   1426:                 * Retrieve the replacement string; if it is
                   1427:                 * undefined, resume searching for escapes.
                   1428:                 */
                   1429:
1.206     schwarze 1430:                switch (stesc[1]) {
1.207     schwarze 1431:                case '*':
1.218     schwarze 1432:                        if (arg_complete)
                   1433:                                res = roff_getstrn(r, stnam, naml);
1.206     schwarze 1434:                        break;
1.207     schwarze 1435:                case 'B':
1.206     schwarze 1436:                        npos = 0;
1.218     schwarze 1437:                        ubuf[0] = arg_complete &&
1.261     schwarze 1438:                            roff_evalnum(r, ln, stnam, &npos,
                   1439:                              NULL, ROFFNUM_SCALE) &&
1.218     schwarze 1440:                            stnam + npos + 1 == cp ? '1' : '0';
1.206     schwarze 1441:                        ubuf[1] = '\0';
                   1442:                        break;
1.207     schwarze 1443:                case 'n':
1.218     schwarze 1444:                        if (arg_complete)
                   1445:                                (void)snprintf(ubuf, sizeof(ubuf), "%d",
                   1446:                                    roff_getregn(r, stnam, naml));
                   1447:                        else
                   1448:                                ubuf[0] = '\0';
1.206     schwarze 1449:                        break;
1.207     schwarze 1450:                case 'w':
1.218     schwarze 1451:                        /* use even incomplete args */
1.208     schwarze 1452:                        (void)snprintf(ubuf, sizeof(ubuf), "%d",
1.206     schwarze 1453:                            24 * (int)naml);
                   1454:                        break;
                   1455:                }
1.94      kristaps 1456:
1.238     schwarze 1457:                if (res == NULL) {
1.219     schwarze 1458:                        mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238     schwarze 1459:                            r->parse, ln, (int)(stesc - buf->buf),
1.219     schwarze 1460:                            "%.*s", (int)naml, stnam);
1.142     kristaps 1461:                        res = "";
1.246     schwarze 1462:                } else if (buf->sz + strlen(res) > SHRT_MAX) {
                   1463:                        mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
                   1464:                            ln, (int)(stesc - buf->buf), NULL);
                   1465:                        return(ROFF_IGN);
1.94      kristaps 1466:                }
                   1467:
1.108     schwarze 1468:                /* Replace the escape sequence by the string. */
                   1469:
1.209     schwarze 1470:                *stesc = '\0';
1.238     schwarze 1471:                buf->sz = mandoc_asprintf(&nbuf, "%s%s%s",
                   1472:                    buf->buf, res, cp) + 1;
1.94      kristaps 1473:
1.205     schwarze 1474:                /* Prepare for the next replacement. */
1.94      kristaps 1475:
1.205     schwarze 1476:                start = nbuf + pos;
1.238     schwarze 1477:                stesc = nbuf + (stesc - buf->buf) + strlen(res);
                   1478:                free(buf->buf);
                   1479:                buf->buf = nbuf;
1.154     kristaps 1480:        }
1.172     schwarze 1481:        return(ROFF_CONT);
1.154     kristaps 1482: }
                   1483:
                   1484: /*
1.178     schwarze 1485:  * Process text streams:
                   1486:  * Convert all breakable hyphens into ASCII_HYPH.
                   1487:  * Decrement and spring input line trap.
1.154     kristaps 1488:  */
                   1489: static enum rofferr
1.238     schwarze 1490: roff_parsetext(struct buf *buf, int pos, int *offs)
1.154     kristaps 1491: {
                   1492:        size_t           sz;
                   1493:        const char      *start;
1.178     schwarze 1494:        char            *p;
                   1495:        int              isz;
1.154     kristaps 1496:        enum mandoc_esc  esc;
                   1497:
1.238     schwarze 1498:        start = p = buf->buf + pos;
1.154     kristaps 1499:
1.238     schwarze 1500:        while (*p != '\0') {
1.154     kristaps 1501:                sz = strcspn(p, "-\\");
                   1502:                p += sz;
                   1503:
1.238     schwarze 1504:                if (*p == '\0')
1.159     kristaps 1505:                        break;
                   1506:
1.238     schwarze 1507:                if (*p == '\\') {
1.154     kristaps 1508:                        /* Skip over escapes. */
                   1509:                        p++;
1.189     schwarze 1510:                        esc = mandoc_escape((const char **)&p, NULL, NULL);
1.238     schwarze 1511:                        if (esc == ESCAPE_ERROR)
1.154     kristaps 1512:                                break;
1.264     schwarze 1513:                        while (*p == '-')
                   1514:                                p++;
1.155     kristaps 1515:                        continue;
1.159     kristaps 1516:                } else if (p == start) {
1.158     kristaps 1517:                        p++;
1.155     kristaps 1518:                        continue;
1.158     kristaps 1519:                }
1.155     kristaps 1520:
1.171     schwarze 1521:                if (isalpha((unsigned char)p[-1]) &&
                   1522:                    isalpha((unsigned char)p[1]))
1.155     kristaps 1523:                        *p = ASCII_HYPH;
                   1524:                p++;
1.94      kristaps 1525:        }
                   1526:
1.178     schwarze 1527:        /* Spring the input line trap. */
1.238     schwarze 1528:        if (roffit_lines == 1) {
                   1529:                isz = mandoc_asprintf(&p, "%s\n.%s", buf->buf, roffit_macro);
                   1530:                free(buf->buf);
                   1531:                buf->buf = p;
                   1532:                buf->sz = isz + 1;
1.178     schwarze 1533:                *offs = 0;
                   1534:                free(roffit_macro);
                   1535:                roffit_lines = 0;
                   1536:                return(ROFF_REPARSE);
1.238     schwarze 1537:        } else if (roffit_lines > 1)
1.178     schwarze 1538:                --roffit_lines;
1.154     kristaps 1539:        return(ROFF_CONT);
1.94      kristaps 1540: }
                   1541:
1.67      kristaps 1542: enum rofferr
1.238     schwarze 1543: roff_parseln(struct roff *r, int ln, struct buf *buf, int *offs)
1.67      kristaps 1544: {
                   1545:        enum rofft       t;
1.109     kristaps 1546:        enum rofferr     e;
1.238     schwarze 1547:        int              pos;   /* parse point */
1.243     schwarze 1548:        int              spos;  /* saved parse point for messages */
1.238     schwarze 1549:        int              ppos;  /* original offset in buf->buf */
                   1550:        int              ctl;   /* macro line (boolean) */
                   1551:
                   1552:        ppos = pos = *offs;
1.79      kristaps 1553:
1.230     schwarze 1554:        /* Handle in-line equation delimiters. */
                   1555:
1.236     schwarze 1556:        if (r->tbl == NULL &&
                   1557:            r->last_eqn != NULL && r->last_eqn->delim &&
1.230     schwarze 1558:            (r->eqn == NULL || r->eqn_inline)) {
1.238     schwarze 1559:                e = roff_eqndelim(r, buf, pos);
1.230     schwarze 1560:                if (e == ROFF_REPARSE)
                   1561:                        return(e);
                   1562:                assert(e == ROFF_CONT);
                   1563:        }
                   1564:
                   1565:        /* Expand some escape sequences. */
1.94      kristaps 1566:
1.238     schwarze 1567:        e = roff_res(r, buf, ln, pos);
                   1568:        if (e == ROFF_IGN)
1.172     schwarze 1569:                return(e);
1.238     schwarze 1570:        assert(e == ROFF_CONT);
1.94      kristaps 1571:
1.238     schwarze 1572:        ctl = roff_getcontrol(r, buf->buf, &pos);
1.130     kristaps 1573:
1.94      kristaps 1574:        /*
1.79      kristaps 1575:         * First, if a scope is open and we're not a macro, pass the
1.252     schwarze 1576:         * text through the macro's filter.
                   1577:         * Equations process all content themselves.
                   1578:         * Tables process almost all content themselves, but we want
                   1579:         * to warn about macros before passing it there.
1.79      kristaps 1580:         */
1.74      kristaps 1581:
1.252     schwarze 1582:        if (r->last != NULL && ! ctl) {
1.78      kristaps 1583:                t = r->last->tok;
                   1584:                assert(roffs[t].text);
1.238     schwarze 1585:                e = (*roffs[t].text)(r, t, buf, ln, pos, pos, offs);
                   1586:                assert(e == ROFF_IGN || e == ROFF_CONT);
                   1587:                if (e != ROFF_CONT)
1.125     kristaps 1588:                        return(e);
1.182     schwarze 1589:        }
1.252     schwarze 1590:        if (r->eqn != NULL)
1.238     schwarze 1591:                return(eqn_read(&r->eqn, ln, buf->buf, ppos, offs));
1.252     schwarze 1592:        if (r->tbl != NULL && ( ! ctl || buf->buf[pos] == '\0'))
1.259     schwarze 1593:                return(tbl_read(r->tbl, ln, buf->buf, ppos));
1.252     schwarze 1594:        if ( ! ctl)
1.238     schwarze 1595:                return(roff_parsetext(buf, pos, offs));
1.228     schwarze 1596:
                   1597:        /* Skip empty request lines. */
                   1598:
1.238     schwarze 1599:        if (buf->buf[pos] == '"') {
1.228     schwarze 1600:                mandoc_msg(MANDOCERR_COMMENT_BAD, r->parse,
                   1601:                    ln, pos, NULL);
                   1602:                return(ROFF_IGN);
1.238     schwarze 1603:        } else if (buf->buf[pos] == '\0')
1.228     schwarze 1604:                return(ROFF_IGN);
1.67      kristaps 1605:
1.79      kristaps 1606:        /*
                   1607:         * If a scope is open, go to the child handler for that macro,
                   1608:         * as it may want to preprocess before doing anything with it.
1.125     kristaps 1609:         * Don't do so if an equation is open.
1.79      kristaps 1610:         */
1.78      kristaps 1611:
1.79      kristaps 1612:        if (r->last) {
                   1613:                t = r->last->tok;
                   1614:                assert(roffs[t].sub);
1.238     schwarze 1615:                return((*roffs[t].sub)(r, t, buf, ln, ppos, pos, offs));
1.79      kristaps 1616:        }
1.78      kristaps 1617:
1.243     schwarze 1618:        /* No scope is open.  This is a new request or macro. */
                   1619:
                   1620:        spos = pos;
                   1621:        t = roff_parse(r, buf->buf, &pos, ln, ppos);
                   1622:
                   1623:        /* Tables ignore most macros. */
                   1624:
                   1625:        if (r->tbl != NULL && (t == ROFF_MAX || t == ROFF_TS)) {
                   1626:                mandoc_msg(MANDOCERR_TBLMACRO, r->parse,
                   1627:                    ln, pos, buf->buf + spos);
1.257     schwarze 1628:                if (t == ROFF_TS)
                   1629:                        return(ROFF_IGN);
                   1630:                while (buf->buf[pos] != '\0' && buf->buf[pos] != ' ')
                   1631:                        pos++;
                   1632:                while (buf->buf[pos] != '\0' && buf->buf[pos] == ' ')
                   1633:                        pos++;
                   1634:                return(tbl_read(r->tbl, ln, buf->buf, pos));
1.243     schwarze 1635:        }
                   1636:
1.79      kristaps 1637:        /*
1.243     schwarze 1638:         * This is neither a roff request nor a user-defined macro.
                   1639:         * Let the standard macro set parsers handle it.
1.79      kristaps 1640:         */
1.67      kristaps 1641:
1.243     schwarze 1642:        if (t == ROFF_MAX)
1.79      kristaps 1643:                return(ROFF_CONT);
1.243     schwarze 1644:
                   1645:        /* Execute a roff request or a user defined macro. */
1.67      kristaps 1646:
1.75      kristaps 1647:        assert(roffs[t].proc);
1.238     schwarze 1648:        return((*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs));
1.74      kristaps 1649: }
                   1650:
1.117     kristaps 1651: void
1.74      kristaps 1652: roff_endparse(struct roff *r)
                   1653: {
                   1654:
1.110     kristaps 1655:        if (r->last)
1.221     schwarze 1656:                mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
                   1657:                    r->last->line, r->last->col,
                   1658:                    roffs[r->last->tok].name);
1.117     kristaps 1659:
1.125     kristaps 1660:        if (r->eqn) {
1.221     schwarze 1661:                mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
                   1662:                    r->eqn->eqn.ln, r->eqn->eqn.pos, "EQ");
1.151     kristaps 1663:                eqn_end(&r->eqn);
1.125     kristaps 1664:        }
                   1665:
1.117     kristaps 1666:        if (r->tbl) {
1.221     schwarze 1667:                mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
                   1668:                    r->tbl->line, r->tbl->pos, "TS");
1.151     kristaps 1669:                tbl_end(&r->tbl);
1.117     kristaps 1670:        }
1.67      kristaps 1671: }
                   1672:
                   1673: /*
                   1674:  * Parse a roff node's type from the input buffer.  This must be in the
                   1675:  * form of ".foo xxx" in the usual way.
                   1676:  */
                   1677: static enum rofft
1.214     schwarze 1678: roff_parse(struct roff *r, char *buf, int *pos, int ln, int ppos)
1.67      kristaps 1679: {
1.214     schwarze 1680:        char            *cp;
1.106     kristaps 1681:        const char      *mac;
                   1682:        size_t           maclen;
1.67      kristaps 1683:        enum rofft       t;
                   1684:
1.214     schwarze 1685:        cp = buf + *pos;
                   1686:
                   1687:        if ('\0' == *cp || '"' == *cp || '\t' == *cp || ' ' == *cp)
1.67      kristaps 1688:                return(ROFF_MAX);
                   1689:
1.214     schwarze 1690:        mac = cp;
                   1691:        maclen = roff_getname(r, &cp, ln, ppos);
1.67      kristaps 1692:
1.106     kristaps 1693:        t = (r->current_string = roff_getstrn(r, mac, maclen))
1.155     kristaps 1694:            ? ROFF_USERDEF : roffhash_find(mac, maclen);
1.67      kristaps 1695:
1.214     schwarze 1696:        if (ROFF_MAX != t)
                   1697:                *pos = cp - buf;
1.67      kristaps 1698:
                   1699:        return(t);
                   1700: }
                   1701:
1.266     schwarze 1702: /* --- handling of request blocks ----------------------------------------- */
                   1703:
1.67      kristaps 1704: static enum rofferr
1.76      kristaps 1705: roff_cblock(ROFF_ARGS)
1.67      kristaps 1706: {
                   1707:
1.79      kristaps 1708:        /*
                   1709:         * A block-close `..' should only be invoked as a child of an
                   1710:         * ignore macro, otherwise raise a warning and just ignore it.
                   1711:         */
                   1712:
1.238     schwarze 1713:        if (r->last == NULL) {
1.221     schwarze 1714:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1715:                    ln, ppos, "..");
1.76      kristaps 1716:                return(ROFF_IGN);
                   1717:        }
1.67      kristaps 1718:
1.81      kristaps 1719:        switch (r->last->tok) {
1.207     schwarze 1720:        case ROFF_am:
1.220     schwarze 1721:                /* ROFF_am1 is remapped to ROFF_am in roff_block(). */
1.81      kristaps 1722:                /* FALLTHROUGH */
1.207     schwarze 1723:        case ROFF_ami:
1.81      kristaps 1724:                /* FALLTHROUGH */
1.207     schwarze 1725:        case ROFF_de:
1.108     schwarze 1726:                /* ROFF_de1 is remapped to ROFF_de in roff_block(). */
1.81      kristaps 1727:                /* FALLTHROUGH */
1.207     schwarze 1728:        case ROFF_dei:
1.81      kristaps 1729:                /* FALLTHROUGH */
1.207     schwarze 1730:        case ROFF_ig:
1.81      kristaps 1731:                break;
                   1732:        default:
1.221     schwarze 1733:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1734:                    ln, ppos, "..");
1.67      kristaps 1735:                return(ROFF_IGN);
1.76      kristaps 1736:        }
1.67      kristaps 1737:
1.238     schwarze 1738:        if (buf->buf[pos] != '\0')
1.217     schwarze 1739:                mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
1.238     schwarze 1740:                    ".. %s", buf->buf + pos);
1.71      kristaps 1741:
                   1742:        roffnode_pop(r);
1.76      kristaps 1743:        roffnode_cleanscope(r);
                   1744:        return(ROFF_IGN);
1.71      kristaps 1745:
1.67      kristaps 1746: }
                   1747:
1.76      kristaps 1748: static void
                   1749: roffnode_cleanscope(struct roff *r)
1.67      kristaps 1750: {
                   1751:
1.76      kristaps 1752:        while (r->last) {
1.173     schwarze 1753:                if (--r->last->endspan != 0)
1.76      kristaps 1754:                        break;
                   1755:                roffnode_pop(r);
                   1756:        }
1.67      kristaps 1757: }
                   1758:
1.195     schwarze 1759: static void
                   1760: roff_ccond(struct roff *r, int ln, int ppos)
1.74      kristaps 1761: {
                   1762:
1.76      kristaps 1763:        if (NULL == r->last) {
1.221     schwarze 1764:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1765:                    ln, ppos, "\\}");
1.195     schwarze 1766:                return;
1.76      kristaps 1767:        }
                   1768:
1.82      kristaps 1769:        switch (r->last->tok) {
1.207     schwarze 1770:        case ROFF_el:
1.82      kristaps 1771:                /* FALLTHROUGH */
1.207     schwarze 1772:        case ROFF_ie:
1.82      kristaps 1773:                /* FALLTHROUGH */
1.207     schwarze 1774:        case ROFF_if:
1.82      kristaps 1775:                break;
                   1776:        default:
1.221     schwarze 1777:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1778:                    ln, ppos, "\\}");
1.195     schwarze 1779:                return;
1.75      kristaps 1780:        }
                   1781:
1.76      kristaps 1782:        if (r->last->endspan > -1) {
1.221     schwarze 1783:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1784:                    ln, ppos, "\\}");
1.195     schwarze 1785:                return;
1.76      kristaps 1786:        }
                   1787:
1.75      kristaps 1788:        roffnode_pop(r);
1.76      kristaps 1789:        roffnode_cleanscope(r);
1.195     schwarze 1790:        return;
1.76      kristaps 1791: }
                   1792:
                   1793: static enum rofferr
1.80      kristaps 1794: roff_block(ROFF_ARGS)
1.76      kristaps 1795: {
1.220     schwarze 1796:        const char      *name;
                   1797:        char            *iname, *cp;
1.213     schwarze 1798:        size_t           namesz;
1.106     kristaps 1799:
1.220     schwarze 1800:        /* Ignore groff compatibility mode for now. */
1.76      kristaps 1801:
1.238     schwarze 1802:        if (tok == ROFF_de1)
1.220     schwarze 1803:                tok = ROFF_de;
1.251     schwarze 1804:        else if (tok == ROFF_dei1)
                   1805:                tok = ROFF_dei;
1.238     schwarze 1806:        else if (tok == ROFF_am1)
1.220     schwarze 1807:                tok = ROFF_am;
1.251     schwarze 1808:        else if (tok == ROFF_ami1)
                   1809:                tok = ROFF_ami;
1.220     schwarze 1810:
                   1811:        /* Parse the macro name argument. */
                   1812:
1.238     schwarze 1813:        cp = buf->buf + pos;
                   1814:        if (tok == ROFF_ig) {
1.220     schwarze 1815:                iname = NULL;
                   1816:                namesz = 0;
                   1817:        } else {
                   1818:                iname = cp;
                   1819:                namesz = roff_getname(r, &cp, ln, ppos);
                   1820:                iname[namesz] = '\0';
                   1821:        }
1.107     kristaps 1822:
1.220     schwarze 1823:        /* Resolve the macro name argument if it is indirect. */
1.107     kristaps 1824:
1.238     schwarze 1825:        if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
                   1826:                if ((name = roff_getstrn(r, iname, namesz)) == NULL) {
1.220     schwarze 1827:                        mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238     schwarze 1828:                            r->parse, ln, (int)(iname - buf->buf),
1.220     schwarze 1829:                            "%.*s", (int)namesz, iname);
                   1830:                        namesz = 0;
                   1831:                } else
                   1832:                        namesz = strlen(name);
                   1833:        } else
                   1834:                name = iname;
1.107     kristaps 1835:
1.238     schwarze 1836:        if (namesz == 0 && tok != ROFF_ig) {
1.220     schwarze 1837:                mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse,
                   1838:                    ln, ppos, roffs[tok].name);
                   1839:                return(ROFF_IGN);
                   1840:        }
1.80      kristaps 1841:
1.106     kristaps 1842:        roffnode_push(r, tok, name, ln, ppos);
                   1843:
                   1844:        /*
                   1845:         * At the beginning of a `de' macro, clear the existing string
                   1846:         * with the same name, if there is one.  New content will be
1.193     schwarze 1847:         * appended from roff_block_text() in multiline mode.
1.106     kristaps 1848:         */
1.107     kristaps 1849:
1.238     schwarze 1850:        if (tok == ROFF_de || tok == ROFF_dei)
1.213     schwarze 1851:                roff_setstrn(&r->strtab, name, namesz, "", 0, 0);
1.76      kristaps 1852:
1.238     schwarze 1853:        if (*cp == '\0')
1.78      kristaps 1854:                return(ROFF_IGN);
                   1855:
1.220     schwarze 1856:        /* Get the custom end marker. */
1.107     kristaps 1857:
1.220     schwarze 1858:        iname = cp;
1.213     schwarze 1859:        namesz = roff_getname(r, &cp, ln, ppos);
1.220     schwarze 1860:
                   1861:        /* Resolve the end marker if it is indirect. */
                   1862:
1.238     schwarze 1863:        if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
                   1864:                if ((name = roff_getstrn(r, iname, namesz)) == NULL) {
1.220     schwarze 1865:                        mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238     schwarze 1866:                            r->parse, ln, (int)(iname - buf->buf),
1.220     schwarze 1867:                            "%.*s", (int)namesz, iname);
                   1868:                        namesz = 0;
                   1869:                } else
                   1870:                        namesz = strlen(name);
                   1871:        } else
                   1872:                name = iname;
                   1873:
1.213     schwarze 1874:        if (namesz)
                   1875:                r->last->end = mandoc_strndup(name, namesz);
1.78      kristaps 1876:
1.238     schwarze 1877:        if (*cp != '\0')
1.217     schwarze 1878:                mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
                   1879:                    ln, pos, ".%s ... %s", roffs[tok].name, cp);
1.74      kristaps 1880:
1.78      kristaps 1881:        return(ROFF_IGN);
                   1882: }
                   1883:
                   1884: static enum rofferr
1.80      kristaps 1885: roff_block_sub(ROFF_ARGS)
1.79      kristaps 1886: {
                   1887:        enum rofft      t;
                   1888:        int             i, j;
                   1889:
                   1890:        /*
                   1891:         * First check whether a custom macro exists at this level.  If
                   1892:         * it does, then check against it.  This is some of groff's
                   1893:         * stranger behaviours.  If we encountered a custom end-scope
                   1894:         * tag and that tag also happens to be a "real" macro, then we
                   1895:         * need to try interpreting it again as a real macro.  If it's
                   1896:         * not, then return ignore.  Else continue.
                   1897:         */
                   1898:
                   1899:        if (r->last->end) {
1.130     kristaps 1900:                for (i = pos, j = 0; r->last->end[j]; j++, i++)
1.238     schwarze 1901:                        if (buf->buf[i] != r->last->end[j])
1.79      kristaps 1902:                                break;
                   1903:
1.238     schwarze 1904:                if (r->last->end[j] == '\0' &&
                   1905:                    (buf->buf[i] == '\0' ||
                   1906:                     buf->buf[i] == ' ' ||
                   1907:                     buf->buf[i] == '\t')) {
1.79      kristaps 1908:                        roffnode_pop(r);
                   1909:                        roffnode_cleanscope(r);
                   1910:
1.238     schwarze 1911:                        while (buf->buf[i] == ' ' || buf->buf[i] == '\t')
1.130     kristaps 1912:                                i++;
                   1913:
                   1914:                        pos = i;
1.238     schwarze 1915:                        if (roff_parse(r, buf->buf, &pos, ln, ppos) !=
                   1916:                            ROFF_MAX)
1.79      kristaps 1917:                                return(ROFF_RERUN);
                   1918:                        return(ROFF_IGN);
                   1919:                }
                   1920:        }
                   1921:
                   1922:        /*
                   1923:         * If we have no custom end-query or lookup failed, then try
                   1924:         * pulling it out of the hashtable.
                   1925:         */
                   1926:
1.238     schwarze 1927:        t = roff_parse(r, buf->buf, &pos, ln, ppos);
1.79      kristaps 1928:
1.238     schwarze 1929:        if (t != ROFF_cblock) {
                   1930:                if (tok != ROFF_ig)
                   1931:                        roff_setstr(r, r->last->name, buf->buf + ppos, 2);
1.79      kristaps 1932:                return(ROFF_IGN);
1.106     kristaps 1933:        }
1.79      kristaps 1934:
                   1935:        assert(roffs[t].proc);
1.238     schwarze 1936:        return((*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs));
1.79      kristaps 1937: }
                   1938:
                   1939: static enum rofferr
1.80      kristaps 1940: roff_block_text(ROFF_ARGS)
1.78      kristaps 1941: {
                   1942:
1.238     schwarze 1943:        if (tok != ROFF_ig)
                   1944:                roff_setstr(r, r->last->name, buf->buf + pos, 2);
1.106     kristaps 1945:
1.78      kristaps 1946:        return(ROFF_IGN);
                   1947: }
                   1948:
                   1949: static enum rofferr
1.82      kristaps 1950: roff_cond_sub(ROFF_ARGS)
                   1951: {
                   1952:        enum rofft       t;
1.139     kristaps 1953:        char            *ep;
1.198     schwarze 1954:        int              rr;
1.82      kristaps 1955:
                   1956:        rr = r->last->rule;
1.139     kristaps 1957:        roffnode_cleanscope(r);
1.238     schwarze 1958:        t = roff_parse(r, buf->buf, &pos, ln, ppos);
1.82      kristaps 1959:
1.139     kristaps 1960:        /*
1.177     schwarze 1961:         * Fully handle known macros when they are structurally
                   1962:         * required or when the conditional evaluated to true.
1.87      kristaps 1963:         */
                   1964:
1.238     schwarze 1965:        if ((t != ROFF_MAX) &&
                   1966:            (rr || roffs[t].flags & ROFFMAC_STRUCT)) {
1.177     schwarze 1967:                assert(roffs[t].proc);
1.238     schwarze 1968:                return((*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs));
1.177     schwarze 1969:        }
1.144     kristaps 1970:
1.196     schwarze 1971:        /*
                   1972:         * If `\}' occurs on a macro line without a preceding macro,
                   1973:         * drop the line completely.
                   1974:         */
                   1975:
1.238     schwarze 1976:        ep = buf->buf + pos;
                   1977:        if (ep[0] == '\\' && ep[1] == '}')
1.198     schwarze 1978:                rr = 0;
1.196     schwarze 1979:
1.177     schwarze 1980:        /* Always check for the closing delimiter `\}'. */
1.144     kristaps 1981:
1.238     schwarze 1982:        while ((ep = strchr(ep, '\\')) != NULL) {
                   1983:                if (*(++ep) == '}') {
1.197     schwarze 1984:                        *ep = '&';
1.238     schwarze 1985:                        roff_ccond(r, ln, ep - buf->buf - 1);
1.197     schwarze 1986:                }
1.247     schwarze 1987:                if (*ep != '\0')
                   1988:                        ++ep;
1.177     schwarze 1989:        }
1.198     schwarze 1990:        return(rr ? ROFF_CONT : ROFF_IGN);
1.82      kristaps 1991: }
                   1992:
                   1993: static enum rofferr
                   1994: roff_cond_text(ROFF_ARGS)
1.78      kristaps 1995: {
1.140     kristaps 1996:        char            *ep;
1.198     schwarze 1997:        int              rr;
1.82      kristaps 1998:
                   1999:        rr = r->last->rule;
1.140     kristaps 2000:        roffnode_cleanscope(r);
1.82      kristaps 2001:
1.238     schwarze 2002:        ep = buf->buf + pos;
                   2003:        while ((ep = strchr(ep, '\\')) != NULL) {
                   2004:                if (*(++ep) == '}') {
1.197     schwarze 2005:                        *ep = '&';
1.238     schwarze 2006:                        roff_ccond(r, ln, ep - buf->buf - 1);
1.197     schwarze 2007:                }
1.247     schwarze 2008:                if (*ep != '\0')
                   2009:                        ++ep;
1.78      kristaps 2010:        }
1.198     schwarze 2011:        return(rr ? ROFF_CONT : ROFF_IGN);
1.74      kristaps 2012: }
                   2013:
1.266     schwarze 2014: /* --- handling of numeric and conditional expressions -------------------- */
                   2015:
1.204     schwarze 2016: /*
                   2017:  * Parse a single signed integer number.  Stop at the first non-digit.
                   2018:  * If there is at least one digit, return success and advance the
                   2019:  * parse point, else return failure and let the parse point unchanged.
                   2020:  * Ignore overflows, treat them just like the C language.
                   2021:  */
1.184     schwarze 2022: static int
1.261     schwarze 2023: roff_getnum(const char *v, int *pos, int *res, int flags)
1.184     schwarze 2024: {
1.261     schwarze 2025:        int      myres, scaled, n, p;
1.206     schwarze 2026:
                   2027:        if (NULL == res)
                   2028:                res = &myres;
1.184     schwarze 2029:
                   2030:        p = *pos;
                   2031:        n = v[p] == '-';
1.261     schwarze 2032:        if (n || v[p] == '+')
1.184     schwarze 2033:                p++;
                   2034:
1.261     schwarze 2035:        if (flags & ROFFNUM_WHITE)
                   2036:                while (isspace((unsigned char)v[p]))
                   2037:                        p++;
                   2038:
1.184     schwarze 2039:        for (*res = 0; isdigit((unsigned char)v[p]); p++)
1.204     schwarze 2040:                *res = 10 * *res + v[p] - '0';
1.184     schwarze 2041:        if (p == *pos + n)
                   2042:                return 0;
                   2043:
                   2044:        if (n)
                   2045:                *res = -*res;
                   2046:
1.254     schwarze 2047:        /* Each number may be followed by one optional scaling unit. */
                   2048:
                   2049:        switch (v[p]) {
                   2050:        case 'f':
1.261     schwarze 2051:                scaled = *res * 65536;
1.254     schwarze 2052:                break;
                   2053:        case 'i':
1.261     schwarze 2054:                scaled = *res * 240;
1.254     schwarze 2055:                break;
                   2056:        case 'c':
1.261     schwarze 2057:                scaled = *res * 240 / 2.54;
1.254     schwarze 2058:                break;
                   2059:        case 'v':
                   2060:                /* FALLTROUGH */
                   2061:        case 'P':
1.261     schwarze 2062:                scaled = *res * 40;
1.254     schwarze 2063:                break;
                   2064:        case 'm':
                   2065:                /* FALLTROUGH */
                   2066:        case 'n':
1.261     schwarze 2067:                scaled = *res * 24;
1.254     schwarze 2068:                break;
                   2069:        case 'p':
1.261     schwarze 2070:                scaled = *res * 10 / 3;
1.254     schwarze 2071:                break;
                   2072:        case 'u':
1.261     schwarze 2073:                scaled = *res;
1.254     schwarze 2074:                break;
                   2075:        case 'M':
1.261     schwarze 2076:                scaled = *res * 6 / 25;
1.254     schwarze 2077:                break;
                   2078:        default:
1.261     schwarze 2079:                scaled = *res;
1.254     schwarze 2080:                p--;
                   2081:                break;
                   2082:        }
1.261     schwarze 2083:        if (flags & ROFFNUM_SCALE)
                   2084:                *res = scaled;
1.254     schwarze 2085:
                   2086:        *pos = p + 1;
                   2087:        return(1);
1.184     schwarze 2088: }
                   2089:
1.198     schwarze 2090: /*
                   2091:  * Evaluate a string comparison condition.
                   2092:  * The first character is the delimiter.
                   2093:  * Succeed if the string up to its second occurrence
                   2094:  * matches the string up to its third occurence.
                   2095:  * Advance the cursor after the third occurrence
                   2096:  * or lacking that, to the end of the line.
                   2097:  */
                   2098: static int
                   2099: roff_evalstrcond(const char *v, int *pos)
                   2100: {
                   2101:        const char      *s1, *s2, *s3;
                   2102:        int              match;
                   2103:
                   2104:        match = 0;
                   2105:        s1 = v + *pos;          /* initial delimiter */
                   2106:        s2 = s1 + 1;            /* for scanning the first string */
                   2107:        s3 = strchr(s2, *s1);   /* for scanning the second string */
                   2108:
                   2109:        if (NULL == s3)         /* found no middle delimiter */
                   2110:                goto out;
                   2111:
                   2112:        while ('\0' != *++s3) {
                   2113:                if (*s2 != *s3) {  /* mismatch */
                   2114:                        s3 = strchr(s3, *s1);
                   2115:                        break;
                   2116:                }
                   2117:                if (*s3 == *s1) {  /* found the final delimiter */
                   2118:                        match = 1;
                   2119:                        break;
                   2120:                }
                   2121:                s2++;
                   2122:        }
                   2123:
                   2124: out:
                   2125:        if (NULL == s3)
                   2126:                s3 = strchr(s2, '\0');
1.242     schwarze 2127:        else if (*s3 != '\0')
1.198     schwarze 2128:                s3++;
                   2129:        *pos = s3 - v;
                   2130:        return(match);
                   2131: }
                   2132:
1.204     schwarze 2133: /*
                   2134:  * Evaluate an optionally negated single character, numerical,
                   2135:  * or string condition.
                   2136:  */
1.198     schwarze 2137: static int
1.271     schwarze 2138: roff_evalcond(struct roff *r, int ln, char *v, int *pos)
1.88      kristaps 2139: {
1.271     schwarze 2140:        char    *cp, *name;
                   2141:        size_t   sz;
1.241     schwarze 2142:        int      number, savepos, wanttrue;
1.88      kristaps 2143:
1.198     schwarze 2144:        if ('!' == v[*pos]) {
                   2145:                wanttrue = 0;
                   2146:                (*pos)++;
                   2147:        } else
                   2148:                wanttrue = 1;
                   2149:
1.88      kristaps 2150:        switch (v[*pos]) {
1.240     schwarze 2151:        case '\0':
                   2152:                return(0);
1.207     schwarze 2153:        case 'n':
1.198     schwarze 2154:                /* FALLTHROUGH */
1.207     schwarze 2155:        case 'o':
1.88      kristaps 2156:                (*pos)++;
1.198     schwarze 2157:                return(wanttrue);
1.207     schwarze 2158:        case 'c':
1.198     schwarze 2159:                /* FALLTHROUGH */
1.207     schwarze 2160:        case 'd':
1.198     schwarze 2161:                /* FALLTHROUGH */
1.207     schwarze 2162:        case 'e':
1.88      kristaps 2163:                /* FALLTHROUGH */
1.207     schwarze 2164:        case 't':
1.239     schwarze 2165:                /* FALLTHROUGH */
                   2166:        case 'v':
1.88      kristaps 2167:                (*pos)++;
1.198     schwarze 2168:                return(!wanttrue);
1.271     schwarze 2169:        case 'r':
                   2170:                cp = name = v + ++*pos;
                   2171:                sz = roff_getname(r, &cp, ln, *pos);
                   2172:                *pos = cp - v;
                   2173:                return((sz && roff_hasregn(r, name, sz)) == wanttrue);
1.88      kristaps 2174:        default:
                   2175:                break;
                   2176:        }
                   2177:
1.241     schwarze 2178:        savepos = *pos;
1.261     schwarze 2179:        if (roff_evalnum(r, ln, v, pos, &number, ROFFNUM_SCALE))
1.204     schwarze 2180:                return((number > 0) == wanttrue);
1.241     schwarze 2181:        else if (*pos == savepos)
                   2182:                return(roff_evalstrcond(v, pos) == wanttrue);
1.204     schwarze 2183:        else
1.241     schwarze 2184:                return (0);
1.88      kristaps 2185: }
                   2186:
1.74      kristaps 2187: static enum rofferr
1.103     kristaps 2188: roff_line_ignore(ROFF_ARGS)
1.89      kristaps 2189: {
1.123     schwarze 2190:
1.89      kristaps 2191:        return(ROFF_IGN);
                   2192: }
                   2193:
1.104     kristaps 2194: static enum rofferr
1.251     schwarze 2195: roff_insec(ROFF_ARGS)
                   2196: {
                   2197:
                   2198:        mandoc_msg(MANDOCERR_REQ_INSEC, r->parse,
                   2199:            ln, ppos, roffs[tok].name);
                   2200:        return(ROFF_IGN);
                   2201: }
                   2202:
                   2203: static enum rofferr
                   2204: roff_unsupp(ROFF_ARGS)
                   2205: {
                   2206:
                   2207:        mandoc_msg(MANDOCERR_REQ_UNSUPP, r->parse,
                   2208:            ln, ppos, roffs[tok].name);
                   2209:        return(ROFF_IGN);
                   2210: }
                   2211:
                   2212: static enum rofferr
1.82      kristaps 2213: roff_cond(ROFF_ARGS)
1.74      kristaps 2214: {
1.173     schwarze 2215:
                   2216:        roffnode_push(r, tok, NULL, ln, ppos);
1.74      kristaps 2217:
1.207     schwarze 2218:        /*
1.134     kristaps 2219:         * An `.el' has no conditional body: it will consume the value
                   2220:         * of the current rstack entry set in prior `ie' calls or
1.207     schwarze 2221:         * defaults to DENY.
1.134     kristaps 2222:         *
                   2223:         * If we're not an `el', however, then evaluate the conditional.
                   2224:         */
1.133     kristaps 2225:
1.238     schwarze 2226:        r->last->rule = tok == ROFF_el ?
1.207     schwarze 2227:            (r->rstackpos < 0 ? 0 : r->rstack[r->rstackpos--]) :
1.238     schwarze 2228:            roff_evalcond(r, ln, buf->buf, &pos);
1.77      kristaps 2229:
1.134     kristaps 2230:        /*
                   2231:         * An if-else will put the NEGATION of the current evaluated
                   2232:         * conditional into the stack of rules.
                   2233:         */
                   2234:
1.238     schwarze 2235:        if (tok == ROFF_ie) {
1.223     schwarze 2236:                if (r->rstackpos + 1 == r->rstacksz) {
                   2237:                        r->rstacksz += 16;
                   2238:                        r->rstack = mandoc_reallocarray(r->rstack,
                   2239:                            r->rstacksz, sizeof(int));
1.134     kristaps 2240:                }
1.198     schwarze 2241:                r->rstack[++r->rstackpos] = !r->last->rule;
1.82      kristaps 2242:        }
1.88      kristaps 2243:
                   2244:        /* If the parent has false as its rule, then so do we. */
                   2245:
1.198     schwarze 2246:        if (r->last->parent && !r->last->parent->rule)
                   2247:                r->last->rule = 0;
1.88      kristaps 2248:
                   2249:        /*
1.173     schwarze 2250:         * Determine scope.
                   2251:         * If there is nothing on the line after the conditional,
                   2252:         * not even whitespace, use next-line scope.
1.88      kristaps 2253:         */
1.74      kristaps 2254:
1.238     schwarze 2255:        if (buf->buf[pos] == '\0') {
1.173     schwarze 2256:                r->last->endspan = 2;
                   2257:                goto out;
                   2258:        }
                   2259:
1.238     schwarze 2260:        while (buf->buf[pos] == ' ')
1.173     schwarze 2261:                pos++;
                   2262:
                   2263:        /* An opening brace requests multiline scope. */
1.75      kristaps 2264:
1.238     schwarze 2265:        if (buf->buf[pos] == '\\' && buf->buf[pos + 1] == '{') {
1.75      kristaps 2266:                r->last->endspan = -1;
                   2267:                pos += 2;
1.272   ! schwarze 2268:                while (buf->buf[pos] == ' ')
        !          2269:                        pos++;
1.173     schwarze 2270:                goto out;
1.207     schwarze 2271:        }
1.74      kristaps 2272:
1.77      kristaps 2273:        /*
1.173     schwarze 2274:         * Anything else following the conditional causes
                   2275:         * single-line scope.  Warn if the scope contains
                   2276:         * nothing but trailing whitespace.
1.77      kristaps 2277:         */
                   2278:
1.238     schwarze 2279:        if (buf->buf[pos] == '\0')
1.216     schwarze 2280:                mandoc_msg(MANDOCERR_COND_EMPTY, r->parse,
                   2281:                    ln, ppos, roffs[tok].name);
1.77      kristaps 2282:
1.173     schwarze 2283:        r->last->endspan = 1;
1.74      kristaps 2284:
1.173     schwarze 2285: out:
1.75      kristaps 2286:        *offs = pos;
                   2287:        return(ROFF_RERUN);
1.83      schwarze 2288: }
                   2289:
                   2290: static enum rofferr
1.92      schwarze 2291: roff_ds(ROFF_ARGS)
                   2292: {
1.212     schwarze 2293:        char            *string;
                   2294:        const char      *name;
                   2295:        size_t           namesz;
1.96      kristaps 2296:
1.251     schwarze 2297:        /* Ignore groff compatibility mode for now. */
                   2298:
                   2299:        if (tok == ROFF_ds1)
                   2300:                tok = ROFF_ds;
                   2301:        else if (tok == ROFF_as1)
                   2302:                tok = ROFF_as;
                   2303:
1.96      kristaps 2304:        /*
1.212     schwarze 2305:         * The first word is the name of the string.
                   2306:         * If it is empty or terminated by an escape sequence,
                   2307:         * abort the `ds' request without defining anything.
1.96      kristaps 2308:         */
1.92      schwarze 2309:
1.238     schwarze 2310:        name = string = buf->buf + pos;
                   2311:        if (*name == '\0')
1.92      schwarze 2312:                return(ROFF_IGN);
                   2313:
1.212     schwarze 2314:        namesz = roff_getname(r, &string, ln, pos);
1.238     schwarze 2315:        if (name[namesz] == '\\')
1.212     schwarze 2316:                return(ROFF_IGN);
                   2317:
                   2318:        /* Read past the initial double-quote, if any. */
1.238     schwarze 2319:        if (*string == '"')
1.92      schwarze 2320:                string++;
                   2321:
1.96      kristaps 2322:        /* The rest is the value. */
1.212     schwarze 2323:        roff_setstrn(&r->strtab, name, namesz, string, strlen(string),
                   2324:            ROFF_as == tok);
1.92      schwarze 2325:        return(ROFF_IGN);
                   2326: }
                   2327:
1.204     schwarze 2328: /*
                   2329:  * Parse a single operator, one or two characters long.
                   2330:  * If the operator is recognized, return success and advance the
                   2331:  * parse point, else return failure and let the parse point unchanged.
                   2332:  */
                   2333: static int
                   2334: roff_getop(const char *v, int *pos, char *res)
                   2335: {
                   2336:
                   2337:        *res = v[*pos];
                   2338:
                   2339:        switch (*res) {
1.207     schwarze 2340:        case '+':
1.204     schwarze 2341:                /* FALLTHROUGH */
1.207     schwarze 2342:        case '-':
1.204     schwarze 2343:                /* FALLTHROUGH */
1.207     schwarze 2344:        case '*':
1.204     schwarze 2345:                /* FALLTHROUGH */
1.207     schwarze 2346:        case '/':
1.204     schwarze 2347:                /* FALLTHROUGH */
1.207     schwarze 2348:        case '%':
1.204     schwarze 2349:                /* FALLTHROUGH */
1.207     schwarze 2350:        case '&':
1.204     schwarze 2351:                /* FALLTHROUGH */
1.207     schwarze 2352:        case ':':
1.204     schwarze 2353:                break;
                   2354:        case '<':
                   2355:                switch (v[*pos + 1]) {
1.207     schwarze 2356:                case '=':
1.204     schwarze 2357:                        *res = 'l';
                   2358:                        (*pos)++;
                   2359:                        break;
1.207     schwarze 2360:                case '>':
1.204     schwarze 2361:                        *res = '!';
                   2362:                        (*pos)++;
                   2363:                        break;
1.207     schwarze 2364:                case '?':
1.204     schwarze 2365:                        *res = 'i';
                   2366:                        (*pos)++;
                   2367:                        break;
                   2368:                default:
                   2369:                        break;
                   2370:                }
                   2371:                break;
                   2372:        case '>':
                   2373:                switch (v[*pos + 1]) {
1.207     schwarze 2374:                case '=':
1.204     schwarze 2375:                        *res = 'g';
                   2376:                        (*pos)++;
                   2377:                        break;
1.207     schwarze 2378:                case '?':
1.204     schwarze 2379:                        *res = 'a';
                   2380:                        (*pos)++;
                   2381:                        break;
                   2382:                default:
                   2383:                        break;
                   2384:                }
                   2385:                break;
                   2386:        case '=':
                   2387:                if ('=' == v[*pos + 1])
                   2388:                        (*pos)++;
                   2389:                break;
                   2390:        default:
                   2391:                return(0);
                   2392:        }
                   2393:        (*pos)++;
                   2394:
                   2395:        return(*res);
                   2396: }
                   2397:
                   2398: /*
                   2399:  * Evaluate either a parenthesized numeric expression
                   2400:  * or a single signed integer number.
                   2401:  */
                   2402: static int
1.235     schwarze 2403: roff_evalpar(struct roff *r, int ln,
1.261     schwarze 2404:        const char *v, int *pos, int *res, int flags)
1.204     schwarze 2405: {
                   2406:
                   2407:        if ('(' != v[*pos])
1.261     schwarze 2408:                return(roff_getnum(v, pos, res, flags));
1.204     schwarze 2409:
                   2410:        (*pos)++;
1.261     schwarze 2411:        if ( ! roff_evalnum(r, ln, v, pos, res, flags | ROFFNUM_WHITE))
1.204     schwarze 2412:                return(0);
                   2413:
1.206     schwarze 2414:        /*
                   2415:         * Omission of the closing parenthesis
                   2416:         * is an error in validation mode,
                   2417:         * but ignored in evaluation mode.
                   2418:         */
                   2419:
1.204     schwarze 2420:        if (')' == v[*pos])
                   2421:                (*pos)++;
1.206     schwarze 2422:        else if (NULL == res)
                   2423:                return(0);
1.204     schwarze 2424:
                   2425:        return(1);
                   2426: }
                   2427:
                   2428: /*
                   2429:  * Evaluate a complete numeric expression.
                   2430:  * Proceed left to right, there is no concept of precedence.
                   2431:  */
                   2432: static int
1.235     schwarze 2433: roff_evalnum(struct roff *r, int ln, const char *v,
1.261     schwarze 2434:        int *pos, int *res, int flags)
1.204     schwarze 2435: {
                   2436:        int              mypos, operand2;
                   2437:        char             operator;
                   2438:
                   2439:        if (NULL == pos) {
                   2440:                mypos = 0;
                   2441:                pos = &mypos;
                   2442:        }
                   2443:
1.261     schwarze 2444:        if (flags & ROFFNUM_WHITE)
1.204     schwarze 2445:                while (isspace((unsigned char)v[*pos]))
                   2446:                        (*pos)++;
                   2447:
1.261     schwarze 2448:        if ( ! roff_evalpar(r, ln, v, pos, res, flags))
1.204     schwarze 2449:                return(0);
                   2450:
                   2451:        while (1) {
1.261     schwarze 2452:                if (flags & ROFFNUM_WHITE)
1.204     schwarze 2453:                        while (isspace((unsigned char)v[*pos]))
                   2454:                                (*pos)++;
                   2455:
                   2456:                if ( ! roff_getop(v, pos, &operator))
                   2457:                        break;
                   2458:
1.261     schwarze 2459:                if (flags & ROFFNUM_WHITE)
1.204     schwarze 2460:                        while (isspace((unsigned char)v[*pos]))
                   2461:                                (*pos)++;
                   2462:
1.261     schwarze 2463:                if ( ! roff_evalpar(r, ln, v, pos, &operand2, flags))
1.204     schwarze 2464:                        return(0);
                   2465:
1.261     schwarze 2466:                if (flags & ROFFNUM_WHITE)
1.204     schwarze 2467:                        while (isspace((unsigned char)v[*pos]))
                   2468:                                (*pos)++;
1.206     schwarze 2469:
                   2470:                if (NULL == res)
                   2471:                        continue;
1.204     schwarze 2472:
                   2473:                switch (operator) {
1.207     schwarze 2474:                case '+':
1.204     schwarze 2475:                        *res += operand2;
                   2476:                        break;
1.207     schwarze 2477:                case '-':
1.204     schwarze 2478:                        *res -= operand2;
                   2479:                        break;
1.207     schwarze 2480:                case '*':
1.204     schwarze 2481:                        *res *= operand2;
                   2482:                        break;
1.207     schwarze 2483:                case '/':
1.244     schwarze 2484:                        if (operand2 == 0) {
1.235     schwarze 2485:                                mandoc_msg(MANDOCERR_DIVZERO,
1.234     kristaps 2486:                                        r->parse, ln, *pos, v);
                   2487:                                *res = 0;
                   2488:                                break;
                   2489:                        }
1.204     schwarze 2490:                        *res /= operand2;
                   2491:                        break;
1.207     schwarze 2492:                case '%':
1.244     schwarze 2493:                        if (operand2 == 0) {
                   2494:                                mandoc_msg(MANDOCERR_DIVZERO,
                   2495:                                        r->parse, ln, *pos, v);
                   2496:                                *res = 0;
                   2497:                                break;
                   2498:                        }
1.204     schwarze 2499:                        *res %= operand2;
                   2500:                        break;
1.207     schwarze 2501:                case '<':
1.204     schwarze 2502:                        *res = *res < operand2;
                   2503:                        break;
1.207     schwarze 2504:                case '>':
1.204     schwarze 2505:                        *res = *res > operand2;
                   2506:                        break;
1.207     schwarze 2507:                case 'l':
1.204     schwarze 2508:                        *res = *res <= operand2;
                   2509:                        break;
1.207     schwarze 2510:                case 'g':
1.204     schwarze 2511:                        *res = *res >= operand2;
                   2512:                        break;
1.207     schwarze 2513:                case '=':
1.204     schwarze 2514:                        *res = *res == operand2;
                   2515:                        break;
1.207     schwarze 2516:                case '!':
1.204     schwarze 2517:                        *res = *res != operand2;
                   2518:                        break;
1.207     schwarze 2519:                case '&':
1.204     schwarze 2520:                        *res = *res && operand2;
                   2521:                        break;
1.207     schwarze 2522:                case ':':
1.204     schwarze 2523:                        *res = *res || operand2;
                   2524:                        break;
1.207     schwarze 2525:                case 'i':
1.204     schwarze 2526:                        if (operand2 < *res)
                   2527:                                *res = operand2;
                   2528:                        break;
1.207     schwarze 2529:                case 'a':
1.204     schwarze 2530:                        if (operand2 > *res)
                   2531:                                *res = operand2;
                   2532:                        break;
                   2533:                default:
                   2534:                        abort();
                   2535:                }
                   2536:        }
                   2537:        return(1);
                   2538: }
                   2539:
1.266     schwarze 2540: /* --- register management ------------------------------------------------ */
                   2541:
1.180     schwarze 2542: void
1.187     schwarze 2543: roff_setreg(struct roff *r, const char *name, int val, char sign)
1.147     kristaps 2544: {
1.180     schwarze 2545:        struct roffreg  *reg;
                   2546:
                   2547:        /* Search for an existing register with the same name. */
                   2548:        reg = r->regtab;
                   2549:
                   2550:        while (reg && strcmp(name, reg->key.p))
                   2551:                reg = reg->next;
1.147     kristaps 2552:
1.180     schwarze 2553:        if (NULL == reg) {
                   2554:                /* Create a new register. */
                   2555:                reg = mandoc_malloc(sizeof(struct roffreg));
                   2556:                reg->key.p = mandoc_strdup(name);
                   2557:                reg->key.sz = strlen(name);
1.187     schwarze 2558:                reg->val = 0;
1.180     schwarze 2559:                reg->next = r->regtab;
                   2560:                r->regtab = reg;
                   2561:        }
                   2562:
1.187     schwarze 2563:        if ('+' == sign)
                   2564:                reg->val += val;
                   2565:        else if ('-' == sign)
                   2566:                reg->val -= val;
                   2567:        else
                   2568:                reg->val = val;
1.147     kristaps 2569: }
                   2570:
1.192     schwarze 2571: /*
                   2572:  * Handle some predefined read-only number registers.
                   2573:  * For now, return -1 if the requested register is not predefined;
                   2574:  * in case a predefined read-only register having the value -1
                   2575:  * were to turn up, another special value would have to be chosen.
                   2576:  */
                   2577: static int
                   2578: roff_getregro(const char *name)
                   2579: {
                   2580:
                   2581:        switch (*name) {
1.207     schwarze 2582:        case 'A':  /* ASCII approximation mode is always off. */
1.192     schwarze 2583:                return(0);
1.207     schwarze 2584:        case 'g':  /* Groff compatibility mode is always on. */
1.192     schwarze 2585:                return(1);
1.207     schwarze 2586:        case 'H':  /* Fixed horizontal resolution. */
1.192     schwarze 2587:                return (24);
1.207     schwarze 2588:        case 'j':  /* Always adjust left margin only. */
1.192     schwarze 2589:                return(0);
1.207     schwarze 2590:        case 'T':  /* Some output device is always defined. */
1.192     schwarze 2591:                return(1);
1.207     schwarze 2592:        case 'V':  /* Fixed vertical resolution. */
1.192     schwarze 2593:                return (40);
                   2594:        default:
                   2595:                return (-1);
                   2596:        }
                   2597: }
                   2598:
1.181     schwarze 2599: int
1.180     schwarze 2600: roff_getreg(const struct roff *r, const char *name)
1.147     kristaps 2601: {
1.180     schwarze 2602:        struct roffreg  *reg;
1.192     schwarze 2603:        int              val;
                   2604:
                   2605:        if ('.' == name[0] && '\0' != name[1] && '\0' == name[2]) {
                   2606:                val = roff_getregro(name + 1);
                   2607:                if (-1 != val)
                   2608:                        return (val);
                   2609:        }
1.180     schwarze 2610:
                   2611:        for (reg = r->regtab; reg; reg = reg->next)
                   2612:                if (0 == strcmp(name, reg->key.p))
1.181     schwarze 2613:                        return(reg->val);
                   2614:
                   2615:        return(0);
                   2616: }
                   2617:
                   2618: static int
                   2619: roff_getregn(const struct roff *r, const char *name, size_t len)
                   2620: {
                   2621:        struct roffreg  *reg;
1.192     schwarze 2622:        int              val;
                   2623:
                   2624:        if ('.' == name[0] && 2 == len) {
                   2625:                val = roff_getregro(name + 1);
                   2626:                if (-1 != val)
                   2627:                        return (val);
                   2628:        }
1.181     schwarze 2629:
                   2630:        for (reg = r->regtab; reg; reg = reg->next)
                   2631:                if (len == reg->key.sz &&
                   2632:                    0 == strncmp(name, reg->key.p, len))
                   2633:                        return(reg->val);
1.271     schwarze 2634:
                   2635:        return(0);
                   2636: }
                   2637:
                   2638: static int
                   2639: roff_hasregn(const struct roff *r, const char *name, size_t len)
                   2640: {
                   2641:        struct roffreg  *reg;
                   2642:        int              val;
                   2643:
                   2644:        if ('.' == name[0] && 2 == len) {
                   2645:                val = roff_getregro(name + 1);
                   2646:                if (-1 != val)
                   2647:                        return(1);
                   2648:        }
                   2649:
                   2650:        for (reg = r->regtab; reg; reg = reg->next)
                   2651:                if (len == reg->key.sz &&
                   2652:                    0 == strncmp(name, reg->key.p, len))
                   2653:                        return(1);
1.147     kristaps 2654:
1.180     schwarze 2655:        return(0);
1.147     kristaps 2656: }
                   2657:
1.180     schwarze 2658: static void
                   2659: roff_freereg(struct roffreg *reg)
1.147     kristaps 2660: {
1.180     schwarze 2661:        struct roffreg  *old_reg;
1.147     kristaps 2662:
1.180     schwarze 2663:        while (NULL != reg) {
                   2664:                free(reg->key.p);
                   2665:                old_reg = reg;
                   2666:                reg = reg->next;
                   2667:                free(old_reg);
                   2668:        }
1.147     kristaps 2669: }
1.92      schwarze 2670:
                   2671: static enum rofferr
1.89      kristaps 2672: roff_nr(ROFF_ARGS)
1.83      schwarze 2673: {
1.212     schwarze 2674:        char            *key, *val;
                   2675:        size_t           keysz;
1.138     kristaps 2676:        int              iv;
1.187     schwarze 2677:        char             sign;
1.89      kristaps 2678:
1.238     schwarze 2679:        key = val = buf->buf + pos;
                   2680:        if (*key == '\0')
1.212     schwarze 2681:                return(ROFF_IGN);
                   2682:
                   2683:        keysz = roff_getname(r, &val, ln, pos);
1.238     schwarze 2684:        if (key[keysz] == '\\')
1.212     schwarze 2685:                return(ROFF_IGN);
                   2686:        key[keysz] = '\0';
1.89      kristaps 2687:
1.187     schwarze 2688:        sign = *val;
1.238     schwarze 2689:        if (sign == '+' || sign == '-')
1.187     schwarze 2690:                val++;
                   2691:
1.261     schwarze 2692:        if (roff_evalnum(r, ln, val, NULL, &iv, ROFFNUM_SCALE))
1.204     schwarze 2693:                roff_setreg(r, key, iv, sign);
1.109     kristaps 2694:
1.203     schwarze 2695:        return(ROFF_IGN);
                   2696: }
                   2697:
                   2698: static enum rofferr
                   2699: roff_rr(ROFF_ARGS)
                   2700: {
                   2701:        struct roffreg  *reg, **prev;
1.212     schwarze 2702:        char            *name, *cp;
                   2703:        size_t           namesz;
1.203     schwarze 2704:
1.238     schwarze 2705:        name = cp = buf->buf + pos;
                   2706:        if (*name == '\0')
1.212     schwarze 2707:                return(ROFF_IGN);
                   2708:        namesz = roff_getname(r, &cp, ln, pos);
                   2709:        name[namesz] = '\0';
1.203     schwarze 2710:
                   2711:        prev = &r->regtab;
                   2712:        while (1) {
                   2713:                reg = *prev;
1.238     schwarze 2714:                if (reg == NULL || !strcmp(name, reg->key.p))
1.203     schwarze 2715:                        break;
                   2716:                prev = &reg->next;
                   2717:        }
1.238     schwarze 2718:        if (reg != NULL) {
1.203     schwarze 2719:                *prev = reg->next;
                   2720:                free(reg->key.p);
                   2721:                free(reg);
                   2722:        }
1.122     schwarze 2723:        return(ROFF_IGN);
                   2724: }
                   2725:
1.266     schwarze 2726: /* --- handler functions for roff requests -------------------------------- */
                   2727:
1.122     schwarze 2728: static enum rofferr
                   2729: roff_rm(ROFF_ARGS)
                   2730: {
                   2731:        const char       *name;
                   2732:        char             *cp;
1.212     schwarze 2733:        size_t            namesz;
1.122     schwarze 2734:
1.238     schwarze 2735:        cp = buf->buf + pos;
                   2736:        while (*cp != '\0') {
1.212     schwarze 2737:                name = cp;
1.238     schwarze 2738:                namesz = roff_getname(r, &cp, ln, (int)(cp - buf->buf));
1.212     schwarze 2739:                roff_setstrn(&r->strtab, name, namesz, NULL, 0, 0);
1.238     schwarze 2740:                if (name[namesz] == '\\')
1.212     schwarze 2741:                        break;
1.122     schwarze 2742:        }
1.178     schwarze 2743:        return(ROFF_IGN);
                   2744: }
                   2745:
                   2746: static enum rofferr
                   2747: roff_it(ROFF_ARGS)
                   2748: {
                   2749:        int              iv;
                   2750:
                   2751:        /* Parse the number of lines. */
1.261     schwarze 2752:
                   2753:        if ( ! roff_evalnum(r, ln, buf->buf, &pos, &iv, 0)) {
1.222     schwarze 2754:                mandoc_msg(MANDOCERR_IT_NONUM, r->parse,
1.238     schwarze 2755:                    ln, ppos, buf->buf + 1);
1.178     schwarze 2756:                return(ROFF_IGN);
                   2757:        }
                   2758:
1.262     schwarze 2759:        while (isspace((unsigned char)buf->buf[pos]))
                   2760:                pos++;
                   2761:
                   2762:        /*
                   2763:         * Arm the input line trap.
                   2764:         * Special-casing "an-trap" is an ugly workaround to cope
                   2765:         * with DocBook stupidly fiddling with man(7) internals.
                   2766:         */
1.261     schwarze 2767:
1.178     schwarze 2768:        roffit_lines = iv;
1.262     schwarze 2769:        roffit_macro = mandoc_strdup(iv != 1 ||
                   2770:            strcmp(buf->buf + pos, "an-trap") ?
                   2771:            buf->buf + pos : "br");
1.109     kristaps 2772:        return(ROFF_IGN);
1.175     schwarze 2773: }
                   2774:
                   2775: static enum rofferr
                   2776: roff_Dd(ROFF_ARGS)
                   2777: {
                   2778:        const char *const       *cp;
                   2779:
1.227     schwarze 2780:        if ((r->options & (MPARSE_MDOC | MPARSE_QUICK)) == 0)
1.175     schwarze 2781:                for (cp = __mdoc_reserved; *cp; cp++)
                   2782:                        roff_setstr(r, *cp, NULL, 0);
                   2783:
1.227     schwarze 2784:        if (r->format == 0)
                   2785:                r->format = MPARSE_MDOC;
                   2786:
1.175     schwarze 2787:        return(ROFF_CONT);
                   2788: }
                   2789:
                   2790: static enum rofferr
                   2791: roff_TH(ROFF_ARGS)
                   2792: {
                   2793:        const char *const       *cp;
                   2794:
1.227     schwarze 2795:        if ((r->options & MPARSE_QUICK) == 0)
1.175     schwarze 2796:                for (cp = __man_reserved; *cp; cp++)
                   2797:                        roff_setstr(r, *cp, NULL, 0);
                   2798:
1.227     schwarze 2799:        if (r->format == 0)
                   2800:                r->format = MPARSE_MAN;
                   2801:
1.175     schwarze 2802:        return(ROFF_CONT);
1.109     kristaps 2803: }
                   2804:
                   2805: static enum rofferr
                   2806: roff_TE(ROFF_ARGS)
                   2807: {
                   2808:
                   2809:        if (NULL == r->tbl)
1.221     schwarze 2810:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   2811:                    ln, ppos, "TE");
1.258     schwarze 2812:        else if ( ! tbl_end(&r->tbl)) {
                   2813:                free(buf->buf);
                   2814:                buf->buf = mandoc_strdup(".sp");
                   2815:                buf->sz = 4;
                   2816:                return(ROFF_REPARSE);
                   2817:        }
1.112     kristaps 2818:        return(ROFF_IGN);
                   2819: }
                   2820:
                   2821: static enum rofferr
                   2822: roff_T_(ROFF_ARGS)
                   2823: {
                   2824:
                   2825:        if (NULL == r->tbl)
1.221     schwarze 2826:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   2827:                    ln, ppos, "T&");
1.112     kristaps 2828:        else
1.116     kristaps 2829:                tbl_restart(ppos, ln, r->tbl);
1.112     kristaps 2830:
1.109     kristaps 2831:        return(ROFF_IGN);
                   2832: }
                   2833:
1.230     schwarze 2834: /*
                   2835:  * Handle in-line equation delimiters.
                   2836:  */
                   2837: static enum rofferr
1.238     schwarze 2838: roff_eqndelim(struct roff *r, struct buf *buf, int pos)
1.151     kristaps 2839: {
1.233     schwarze 2840:        char            *cp1, *cp2;
                   2841:        const char      *bef_pr, *bef_nl, *mac, *aft_nl, *aft_pr;
1.151     kristaps 2842:
1.230     schwarze 2843:        /*
                   2844:         * Outside equations, look for an opening delimiter.
                   2845:         * If we are inside an equation, we already know it is
                   2846:         * in-line, or this function wouldn't have been called;
                   2847:         * so look for a closing delimiter.
                   2848:         */
                   2849:
1.238     schwarze 2850:        cp1 = buf->buf + pos;
1.230     schwarze 2851:        cp2 = strchr(cp1, r->eqn == NULL ?
                   2852:            r->last_eqn->odelim : r->last_eqn->cdelim);
                   2853:        if (cp2 == NULL)
                   2854:                return(ROFF_CONT);
                   2855:
1.233     schwarze 2856:        *cp2++ = '\0';
                   2857:        bef_pr = bef_nl = aft_nl = aft_pr = "";
                   2858:
                   2859:        /* Handle preceding text, protecting whitespace. */
                   2860:
1.238     schwarze 2861:        if (*buf->buf != '\0') {
1.233     schwarze 2862:                if (r->eqn == NULL)
                   2863:                        bef_pr = "\\&";
                   2864:                bef_nl = "\n";
                   2865:        }
                   2866:
                   2867:        /*
                   2868:         * Prepare replacing the delimiter with an equation macro
                   2869:         * and drop leading white space from the equation.
                   2870:         */
1.230     schwarze 2871:
1.233     schwarze 2872:        if (r->eqn == NULL) {
                   2873:                while (*cp2 == ' ')
                   2874:                        cp2++;
                   2875:                mac = ".EQ";
                   2876:        } else
                   2877:                mac = ".EN";
                   2878:
                   2879:        /* Handle following text, protecting whitespace. */
                   2880:
                   2881:        if (*cp2 != '\0') {
                   2882:                aft_nl = "\n";
                   2883:                if (r->eqn != NULL)
                   2884:                        aft_pr = "\\&";
                   2885:        }
                   2886:
                   2887:        /* Do the actual replacement. */
                   2888:
1.238     schwarze 2889:        buf->sz = mandoc_asprintf(&cp1, "%s%s%s%s%s%s%s", buf->buf,
1.233     schwarze 2890:            bef_pr, bef_nl, mac, aft_nl, aft_pr, cp2) + 1;
1.238     schwarze 2891:        free(buf->buf);
                   2892:        buf->buf = cp1;
1.230     schwarze 2893:
                   2894:        /* Toggle the in-line state of the eqn subsystem. */
                   2895:
                   2896:        r->eqn_inline = r->eqn == NULL;
                   2897:        return(ROFF_REPARSE);
1.151     kristaps 2898: }
                   2899:
1.235     schwarze 2900: static enum rofferr
                   2901: roff_EQ(ROFF_ARGS)
1.125     kristaps 2902: {
1.151     kristaps 2903:        struct eqn_node *e;
1.125     kristaps 2904:
1.238     schwarze 2905:        assert(r->eqn == NULL);
1.235     schwarze 2906:        e = eqn_alloc(ppos, ln, r->parse);
1.125     kristaps 2907:
1.230     schwarze 2908:        if (r->last_eqn) {
1.125     kristaps 2909:                r->last_eqn->next = e;
1.230     schwarze 2910:                e->delim = r->last_eqn->delim;
                   2911:                e->odelim = r->last_eqn->odelim;
                   2912:                e->cdelim = r->last_eqn->cdelim;
                   2913:        } else
1.125     kristaps 2914:                r->first_eqn = r->last_eqn = e;
                   2915:
                   2916:        r->eqn = r->last_eqn = e;
1.151     kristaps 2917:
1.238     schwarze 2918:        if (buf->buf[pos] != '\0')
1.235     schwarze 2919:                mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
1.238     schwarze 2920:                    ".EQ %s", buf->buf + pos);
1.151     kristaps 2921:
1.125     kristaps 2922:        return(ROFF_IGN);
                   2923: }
                   2924:
                   2925: static enum rofferr
                   2926: roff_EN(ROFF_ARGS)
                   2927: {
                   2928:
1.221     schwarze 2929:        mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse, ln, ppos, "EN");
1.125     kristaps 2930:        return(ROFF_IGN);
                   2931: }
                   2932:
                   2933: static enum rofferr
1.109     kristaps 2934: roff_TS(ROFF_ARGS)
                   2935: {
1.176     schwarze 2936:        struct tbl_node *tbl;
1.89      kristaps 2937:
1.115     kristaps 2938:        if (r->tbl) {
1.221     schwarze 2939:                mandoc_msg(MANDOCERR_BLK_BROKEN, r->parse,
                   2940:                    ln, ppos, "TS breaks TS");
1.151     kristaps 2941:                tbl_end(&r->tbl);
1.115     kristaps 2942:        }
1.83      schwarze 2943:
1.176     schwarze 2944:        tbl = tbl_alloc(ppos, ln, r->parse);
1.113     kristaps 2945:
                   2946:        if (r->last_tbl)
1.176     schwarze 2947:                r->last_tbl->next = tbl;
1.113     kristaps 2948:        else
1.176     schwarze 2949:                r->first_tbl = r->last_tbl = tbl;
1.113     kristaps 2950:
1.176     schwarze 2951:        r->tbl = r->last_tbl = tbl;
1.83      schwarze 2952:        return(ROFF_IGN);
1.251     schwarze 2953: }
                   2954:
                   2955: static enum rofferr
                   2956: roff_brp(ROFF_ARGS)
                   2957: {
                   2958:
                   2959:        buf->buf[pos - 1] = '\0';
                   2960:        return(ROFF_CONT);
1.92      schwarze 2961: }
                   2962:
1.105     kristaps 2963: static enum rofferr
1.174     kristaps 2964: roff_cc(ROFF_ARGS)
                   2965: {
                   2966:        const char      *p;
                   2967:
1.238     schwarze 2968:        p = buf->buf + pos;
1.174     kristaps 2969:
1.238     schwarze 2970:        if (*p == '\0' || (r->control = *p++) == '.')
1.174     kristaps 2971:                r->control = 0;
                   2972:
1.238     schwarze 2973:        if (*p != '\0')
1.260     schwarze 2974:                mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
                   2975:                    ln, p - buf->buf, "cc ... %s", p);
1.174     kristaps 2976:
                   2977:        return(ROFF_IGN);
                   2978: }
                   2979:
                   2980: static enum rofferr
1.164     kristaps 2981: roff_tr(ROFF_ARGS)
                   2982: {
                   2983:        const char      *p, *first, *second;
                   2984:        size_t           fsz, ssz;
                   2985:        enum mandoc_esc  esc;
                   2986:
1.238     schwarze 2987:        p = buf->buf + pos;
1.164     kristaps 2988:
1.238     schwarze 2989:        if (*p == '\0') {
1.260     schwarze 2990:                mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse, ln, ppos, "tr");
1.164     kristaps 2991:                return(ROFF_IGN);
                   2992:        }
                   2993:
1.238     schwarze 2994:        while (*p != '\0') {
1.164     kristaps 2995:                fsz = ssz = 1;
                   2996:
                   2997:                first = p++;
1.238     schwarze 2998:                if (*first == '\\') {
1.164     kristaps 2999:                        esc = mandoc_escape(&p, NULL, NULL);
1.238     schwarze 3000:                        if (esc == ESCAPE_ERROR) {
1.219     schwarze 3001:                                mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238     schwarze 3002:                                    ln, (int)(p - buf->buf), first);
1.164     kristaps 3003:                                return(ROFF_IGN);
                   3004:                        }
                   3005:                        fsz = (size_t)(p - first);
                   3006:                }
                   3007:
                   3008:                second = p++;
1.238     schwarze 3009:                if (*second == '\\') {
1.164     kristaps 3010:                        esc = mandoc_escape(&p, NULL, NULL);
1.238     schwarze 3011:                        if (esc == ESCAPE_ERROR) {
1.219     schwarze 3012:                                mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238     schwarze 3013:                                    ln, (int)(p - buf->buf), second);
1.164     kristaps 3014:                                return(ROFF_IGN);
                   3015:                        }
                   3016:                        ssz = (size_t)(p - second);
1.238     schwarze 3017:                } else if (*second == '\0') {
1.260     schwarze 3018:                        mandoc_vmsg(MANDOCERR_TR_ODD, r->parse,
                   3019:                            ln, first - buf->buf, "tr %s", first);
1.164     kristaps 3020:                        second = " ";
1.165     kristaps 3021:                        p--;
1.164     kristaps 3022:                }
                   3023:
1.167     kristaps 3024:                if (fsz > 1) {
1.207     schwarze 3025:                        roff_setstrn(&r->xmbtab, first, fsz,
                   3026:                            second, ssz, 0);
1.167     kristaps 3027:                        continue;
                   3028:                }
                   3029:
1.238     schwarze 3030:                if (r->xtab == NULL)
1.207     schwarze 3031:                        r->xtab = mandoc_calloc(128,
                   3032:                            sizeof(struct roffstr));
1.167     kristaps 3033:
                   3034:                free(r->xtab[(int)*first].p);
                   3035:                r->xtab[(int)*first].p = mandoc_strndup(second, ssz);
                   3036:                r->xtab[(int)*first].sz = ssz;
1.164     kristaps 3037:        }
                   3038:
                   3039:        return(ROFF_IGN);
                   3040: }
                   3041:
                   3042: static enum rofferr
1.105     kristaps 3043: roff_so(ROFF_ARGS)
                   3044: {
1.249     schwarze 3045:        char *name, *cp;
1.105     kristaps 3046:
1.238     schwarze 3047:        name = buf->buf + pos;
1.224     schwarze 3048:        mandoc_vmsg(MANDOCERR_SO, r->parse, ln, ppos, "so %s", name);
1.105     kristaps 3049:
                   3050:        /*
                   3051:         * Handle `so'.  Be EXTREMELY careful, as we shouldn't be
                   3052:         * opening anything that's not in our cwd or anything beneath
                   3053:         * it.  Thus, explicitly disallow traversing up the file-system
                   3054:         * or using absolute paths.
                   3055:         */
                   3056:
1.238     schwarze 3057:        if (*name == '/' || strstr(name, "../") || strstr(name, "/..")) {
1.210     schwarze 3058:                mandoc_vmsg(MANDOCERR_SO_PATH, r->parse, ln, ppos,
                   3059:                    ".so %s", name);
1.249     schwarze 3060:                buf->sz = mandoc_asprintf(&cp,
                   3061:                    ".sp\nSee the file %s.\n.sp", name) + 1;
                   3062:                free(buf->buf);
                   3063:                buf->buf = cp;
                   3064:                *offs = 0;
                   3065:                return(ROFF_REPARSE);
1.105     kristaps 3066:        }
                   3067:
                   3068:        *offs = pos;
                   3069:        return(ROFF_SO);
                   3070: }
1.92      schwarze 3071:
1.266     schwarze 3072: /* --- user defined strings and macros ------------------------------------ */
                   3073:
1.106     kristaps 3074: static enum rofferr
                   3075: roff_userdef(ROFF_ARGS)
1.99      kristaps 3076: {
1.263     schwarze 3077:        const char       *arg[9], *ap;
1.106     kristaps 3078:        char             *cp, *n1, *n2;
1.119     schwarze 3079:        int               i;
1.263     schwarze 3080:        size_t            asz, rsz;
1.106     kristaps 3081:
                   3082:        /*
                   3083:         * Collect pointers to macro argument strings
1.188     schwarze 3084:         * and NUL-terminate them.
1.106     kristaps 3085:         */
1.263     schwarze 3086:
1.238     schwarze 3087:        cp = buf->buf + pos;
1.119     schwarze 3088:        for (i = 0; i < 9; i++)
1.238     schwarze 3089:                arg[i] = *cp == '\0' ? "" :
1.136     kristaps 3090:                    mandoc_getarg(r->parse, &cp, ln, &pos);
1.99      kristaps 3091:
1.106     kristaps 3092:        /*
                   3093:         * Expand macro arguments.
1.99      kristaps 3094:         */
1.263     schwarze 3095:
                   3096:        buf->sz = strlen(r->current_string) + 1;
                   3097:        n1 = cp = mandoc_malloc(buf->sz);
                   3098:        memcpy(n1, r->current_string, buf->sz);
                   3099:        while (*cp != '\0') {
                   3100:
                   3101:                /* Scan ahead for the next argument invocation. */
                   3102:
                   3103:                if (*cp++ != '\\')
                   3104:                        continue;
                   3105:                if (*cp++ != '$')
                   3106:                        continue;
                   3107:                i = *cp - '1';
                   3108:                if (0 > i || 8 < i)
1.106     kristaps 3109:                        continue;
1.263     schwarze 3110:                cp -= 2;
                   3111:
                   3112:                /*
                   3113:                 * Determine the size of the expanded argument,
                   3114:                 * taking escaping of quotes into account.
                   3115:                 */
                   3116:
                   3117:                asz = 0;
                   3118:                for (ap = arg[i]; *ap != '\0'; ap++) {
                   3119:                        asz++;
                   3120:                        if (*ap == '"')
                   3121:                                asz += 3;
                   3122:                }
                   3123:                if (asz != 3) {
                   3124:
                   3125:                        /*
                   3126:                         * Determine the size of the rest of the
                   3127:                         * unexpanded macro, including the NUL.
                   3128:                         */
                   3129:
                   3130:                        rsz = buf->sz - (cp - n1) - 3;
                   3131:
                   3132:                        /*
                   3133:                         * When shrinking, move before
                   3134:                         * releasing the storage.
                   3135:                         */
                   3136:
                   3137:                        if (asz < 3)
                   3138:                                memmove(cp + asz, cp + 3, rsz);
                   3139:
                   3140:                        /*
                   3141:                         * Resize the storage for the macro
                   3142:                         * and readjust the parse pointer.
                   3143:                         */
                   3144:
                   3145:                        buf->sz += asz - 3;
                   3146:                        n2 = mandoc_realloc(n1, buf->sz);
                   3147:                        cp = n2 + (cp - n1);
                   3148:                        n1 = n2;
                   3149:
                   3150:                        /*
                   3151:                         * When growing, make room
                   3152:                         * for the expanded argument.
                   3153:                         */
                   3154:
                   3155:                        if (asz > 3)
                   3156:                                memmove(cp + asz, cp + 3, rsz);
                   3157:                }
                   3158:
                   3159:                /* Copy the expanded argument, escaping quotes. */
                   3160:
                   3161:                n2 = cp;
                   3162:                for (ap = arg[i]; *ap != '\0'; ap++) {
                   3163:                        if (*ap == '"') {
                   3164:                                memcpy(n2, "\\(dq", 4);
                   3165:                                n2 += 4;
                   3166:                        } else
                   3167:                                *n2++ = *ap;
1.106     kristaps 3168:                }
1.99      kristaps 3169:        }
                   3170:
1.106     kristaps 3171:        /*
                   3172:         * Replace the macro invocation
                   3173:         * by the expanded macro.
                   3174:         */
1.263     schwarze 3175:
1.238     schwarze 3176:        free(buf->buf);
                   3177:        buf->buf = n1;
1.248     schwarze 3178:        *offs = 0;
1.106     kristaps 3179:
1.238     schwarze 3180:        return(buf->sz > 1 && buf->buf[buf->sz - 2] == '\n' ?
1.106     kristaps 3181:           ROFF_REPARSE : ROFF_APPEND);
1.99      kristaps 3182: }
1.121     schwarze 3183:
1.212     schwarze 3184: static size_t
1.121     schwarze 3185: roff_getname(struct roff *r, char **cpp, int ln, int pos)
                   3186: {
                   3187:        char     *name, *cp;
1.212     schwarze 3188:        size_t    namesz;
1.121     schwarze 3189:
                   3190:        name = *cpp;
                   3191:        if ('\0' == *name)
1.212     schwarze 3192:                return(0);
1.121     schwarze 3193:
1.212     schwarze 3194:        /* Read until end of name and terminate it with NUL. */
                   3195:        for (cp = name; 1; cp++) {
                   3196:                if ('\0' == *cp || ' ' == *cp) {
                   3197:                        namesz = cp - name;
                   3198:                        break;
                   3199:                }
1.121     schwarze 3200:                if ('\\' != *cp)
                   3201:                        continue;
1.215     schwarze 3202:                namesz = cp - name;
                   3203:                if ('{' == cp[1] || '}' == cp[1])
                   3204:                        break;
1.121     schwarze 3205:                cp++;
                   3206:                if ('\\' == *cp)
                   3207:                        continue;
1.224     schwarze 3208:                mandoc_vmsg(MANDOCERR_NAMESC, r->parse, ln, pos,
                   3209:                    "%.*s", (int)(cp - name + 1), name);
1.212     schwarze 3210:                mandoc_escape((const char **)&cp, NULL, NULL);
                   3211:                break;
1.121     schwarze 3212:        }
                   3213:
                   3214:        /* Read past spaces. */
                   3215:        while (' ' == *cp)
                   3216:                cp++;
                   3217:
                   3218:        *cpp = cp;
1.212     schwarze 3219:        return(namesz);
1.121     schwarze 3220: }
                   3221:
1.106     kristaps 3222: /*
                   3223:  * Store *string into the user-defined string called *name.
                   3224:  * To clear an existing entry, call with (*r, *name, NULL, 0).
1.193     schwarze 3225:  * append == 0: replace mode
                   3226:  * append == 1: single-line append mode
                   3227:  * append == 2: multiline append mode, append '\n' after each call
1.106     kristaps 3228:  */
1.94      kristaps 3229: static void
1.106     kristaps 3230: roff_setstr(struct roff *r, const char *name, const char *string,
1.193     schwarze 3231:        int append)
1.92      schwarze 3232: {
1.164     kristaps 3233:
                   3234:        roff_setstrn(&r->strtab, name, strlen(name), string,
1.207     schwarze 3235:            string ? strlen(string) : 0, append);
1.164     kristaps 3236: }
                   3237:
                   3238: static void
1.166     kristaps 3239: roff_setstrn(struct roffkv **r, const char *name, size_t namesz,
1.193     schwarze 3240:                const char *string, size_t stringsz, int append)
1.164     kristaps 3241: {
1.166     kristaps 3242:        struct roffkv   *n;
1.164     kristaps 3243:        char            *c;
                   3244:        int              i;
                   3245:        size_t           oldch, newch;
1.92      schwarze 3246:
1.106     kristaps 3247:        /* Search for an existing string with the same name. */
1.164     kristaps 3248:        n = *r;
                   3249:
1.211     schwarze 3250:        while (n && (namesz != n->key.sz ||
                   3251:                        strncmp(n->key.p, name, namesz)))
1.92      schwarze 3252:                n = n->next;
1.94      kristaps 3253:
                   3254:        if (NULL == n) {
1.106     kristaps 3255:                /* Create a new string table entry. */
1.166     kristaps 3256:                n = mandoc_malloc(sizeof(struct roffkv));
                   3257:                n->key.p = mandoc_strndup(name, namesz);
                   3258:                n->key.sz = namesz;
                   3259:                n->val.p = NULL;
                   3260:                n->val.sz = 0;
1.164     kristaps 3261:                n->next = *r;
                   3262:                *r = n;
1.193     schwarze 3263:        } else if (0 == append) {
1.166     kristaps 3264:                free(n->val.p);
                   3265:                n->val.p = NULL;
                   3266:                n->val.sz = 0;
1.106     kristaps 3267:        }
                   3268:
                   3269:        if (NULL == string)
                   3270:                return;
                   3271:
                   3272:        /*
                   3273:         * One additional byte for the '\n' in multiline mode,
                   3274:         * and one for the terminating '\0'.
                   3275:         */
1.193     schwarze 3276:        newch = stringsz + (1 < append ? 2u : 1u);
1.164     kristaps 3277:
1.166     kristaps 3278:        if (NULL == n->val.p) {
                   3279:                n->val.p = mandoc_malloc(newch);
                   3280:                *n->val.p = '\0';
1.106     kristaps 3281:                oldch = 0;
                   3282:        } else {
1.166     kristaps 3283:                oldch = n->val.sz;
                   3284:                n->val.p = mandoc_realloc(n->val.p, oldch + newch);
1.106     kristaps 3285:        }
                   3286:
                   3287:        /* Skip existing content in the destination buffer. */
1.166     kristaps 3288:        c = n->val.p + (int)oldch;
1.106     kristaps 3289:
                   3290:        /* Append new content to the destination buffer. */
1.164     kristaps 3291:        i = 0;
                   3292:        while (i < (int)stringsz) {
1.106     kristaps 3293:                /*
                   3294:                 * Rudimentary roff copy mode:
                   3295:                 * Handle escaped backslashes.
                   3296:                 */
1.164     kristaps 3297:                if ('\\' == string[i] && '\\' == string[i + 1])
                   3298:                        i++;
                   3299:                *c++ = string[i++];
1.106     kristaps 3300:        }
1.94      kristaps 3301:
1.106     kristaps 3302:        /* Append terminating bytes. */
1.193     schwarze 3303:        if (1 < append)
1.106     kristaps 3304:                *c++ = '\n';
1.163     kristaps 3305:
1.106     kristaps 3306:        *c = '\0';
1.166     kristaps 3307:        n->val.sz = (int)(c - n->val.p);
1.92      schwarze 3308: }
                   3309:
1.94      kristaps 3310: static const char *
                   3311: roff_getstrn(const struct roff *r, const char *name, size_t len)
1.92      schwarze 3312: {
1.166     kristaps 3313:        const struct roffkv *n;
1.191     schwarze 3314:        int i;
1.92      schwarze 3315:
1.164     kristaps 3316:        for (n = r->strtab; n; n = n->next)
1.207     schwarze 3317:                if (0 == strncmp(name, n->key.p, len) &&
                   3318:                    '\0' == n->key.p[(int)len])
1.166     kristaps 3319:                        return(n->val.p);
1.191     schwarze 3320:
                   3321:        for (i = 0; i < PREDEFS_MAX; i++)
                   3322:                if (0 == strncmp(name, predefs[i].name, len) &&
                   3323:                                '\0' == predefs[i].name[(int)len])
                   3324:                        return(predefs[i].str);
1.94      kristaps 3325:
1.157     kristaps 3326:        return(NULL);
1.92      schwarze 3327: }
                   3328:
1.94      kristaps 3329: static void
1.167     kristaps 3330: roff_freestr(struct roffkv *r)
1.92      schwarze 3331: {
1.166     kristaps 3332:        struct roffkv    *n, *nn;
1.92      schwarze 3333:
1.167     kristaps 3334:        for (n = r; n; n = nn) {
1.166     kristaps 3335:                free(n->key.p);
                   3336:                free(n->val.p);
1.92      schwarze 3337:                nn = n->next;
                   3338:                free(n);
                   3339:        }
1.114     kristaps 3340: }
1.266     schwarze 3341:
                   3342: /* --- accessors and utility functions ------------------------------------ */
1.114     kristaps 3343:
                   3344: const struct tbl_span *
                   3345: roff_span(const struct roff *r)
                   3346: {
1.207     schwarze 3347:
1.114     kristaps 3348:        return(r->tbl ? tbl_span(r->tbl) : NULL);
1.125     kristaps 3349: }
                   3350:
                   3351: const struct eqn *
                   3352: roff_eqn(const struct roff *r)
                   3353: {
1.207     schwarze 3354:
1.125     kristaps 3355:        return(r->last_eqn ? &r->last_eqn->eqn : NULL);
1.164     kristaps 3356: }
                   3357:
                   3358: /*
                   3359:  * Duplicate an input string, making the appropriate character
                   3360:  * conversations (as stipulated by `tr') along the way.
                   3361:  * Returns a heap-allocated string with all the replacements made.
                   3362:  */
                   3363: char *
                   3364: roff_strdup(const struct roff *r, const char *p)
                   3365: {
1.166     kristaps 3366:        const struct roffkv *cp;
1.164     kristaps 3367:        char            *res;
                   3368:        const char      *pp;
                   3369:        size_t           ssz, sz;

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