Annotation of mandoc/roff.c, Revision 1.246
1.246 ! schwarze 1: /* $Id: roff.c,v 1.245 2014/12/25 17:23:32 schwarze Exp $ */
1.1 kristaps 2: /*
1.175 schwarze 3: * Copyright (c) 2010, 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
1.190 schwarze 4: * Copyright (c) 2010-2014 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 5: *
6: * Permission to use, copy, modify, and distribute this software for any
1.66 kristaps 7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
1.1 kristaps 9: *
1.106 kristaps 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.66 kristaps 11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.106 kristaps 12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.66 kristaps 13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1 kristaps 17: */
1.66 kristaps 18: #include "config.h"
1.225 schwarze 19:
20: #include <sys/types.h>
1.30 kristaps 21:
1.67 kristaps 22: #include <assert.h>
1.85 kristaps 23: #include <ctype.h>
1.245 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"
1.226 schwarze 31: #include "libmandoc.h"
1.109 kristaps 32: #include "libroff.h"
1.33 kristaps 33:
1.141 kristaps 34: /* Maximum number of nested if-else conditionals. */
1.82 kristaps 35: #define RSTACK_MAX 128
36:
1.170 schwarze 37: /* Maximum number of string expansions per line, to break infinite loops. */
38: #define EXPAND_LIMIT 1000
39:
1.67 kristaps 40: enum rofft {
1.103 kristaps 41: ROFF_ad,
1.80 kristaps 42: ROFF_am,
43: ROFF_ami,
44: ROFF_am1,
1.193 schwarze 45: ROFF_as,
1.174 kristaps 46: ROFF_cc,
1.194 schwarze 47: ROFF_ce,
1.80 kristaps 48: ROFF_de,
49: ROFF_dei,
50: ROFF_de1,
1.83 schwarze 51: ROFF_ds,
1.82 kristaps 52: ROFF_el,
1.185 schwarze 53: ROFF_fam,
1.186 schwarze 54: ROFF_hw,
1.103 kristaps 55: ROFF_hy,
1.82 kristaps 56: ROFF_ie,
1.75 kristaps 57: ROFF_if,
1.76 kristaps 58: ROFF_ig,
1.123 schwarze 59: ROFF_it,
1.103 kristaps 60: ROFF_ne,
61: ROFF_nh,
1.104 kristaps 62: ROFF_nr,
1.124 schwarze 63: ROFF_ns,
1.229 schwarze 64: ROFF_pl,
1.124 schwarze 65: ROFF_ps,
1.83 schwarze 66: ROFF_rm,
1.203 schwarze 67: ROFF_rr,
1.105 kristaps 68: ROFF_so,
1.124 schwarze 69: ROFF_ta,
1.83 schwarze 70: ROFF_tr,
1.175 schwarze 71: ROFF_Dd,
72: ROFF_TH,
1.109 kristaps 73: ROFF_TS,
74: ROFF_TE,
1.112 kristaps 75: ROFF_T_,
1.125 kristaps 76: ROFF_EQ,
77: ROFF_EN,
1.76 kristaps 78: ROFF_cblock,
1.106 kristaps 79: ROFF_USERDEF,
1.67 kristaps 80: ROFF_MAX
81: };
82:
1.147 kristaps 83: /*
1.167 kristaps 84: * An incredibly-simple string buffer.
85: */
1.94 kristaps 86: struct roffstr {
1.167 kristaps 87: char *p; /* nil-terminated buffer */
88: size_t sz; /* saved strlen(p) */
1.166 kristaps 89: };
90:
91: /*
1.167 kristaps 92: * A key-value roffstr pair as part of a singly-linked list.
1.166 kristaps 93: */
94: struct roffkv {
95: struct roffstr key;
96: struct roffstr val;
97: struct roffkv *next; /* next in list */
1.94 kristaps 98: };
99:
1.180 schwarze 100: /*
101: * A single number register as part of a singly-linked list.
102: */
103: struct roffreg {
104: struct roffstr key;
1.181 schwarze 105: int val;
1.180 schwarze 106: struct roffreg *next;
107: };
108:
1.67 kristaps 109: struct roff {
1.128 kristaps 110: struct mparse *parse; /* parse point */
1.237 schwarze 111: const struct mchars *mchars; /* character table */
1.67 kristaps 112: struct roffnode *last; /* leaf of stack */
1.223 schwarze 113: int *rstack; /* stack of inverted `ie' values */
1.180 schwarze 114: struct roffreg *regtab; /* number registers */
1.166 kristaps 115: struct roffkv *strtab; /* user-defined strings & macros */
1.167 kristaps 116: struct roffkv *xmbtab; /* multi-byte trans table (`tr') */
117: struct roffstr *xtab; /* single-byte trans table (`tr') */
1.106 kristaps 118: const char *current_string; /* value of last called user macro */
1.118 kristaps 119: struct tbl_node *first_tbl; /* first table parsed */
120: struct tbl_node *last_tbl; /* last table parsed */
121: struct tbl_node *tbl; /* current table being parsed */
1.125 kristaps 122: struct eqn_node *last_eqn; /* last equation parsed */
123: struct eqn_node *first_eqn; /* first equation parsed */
124: struct eqn_node *eqn; /* current equation being parsed */
1.230 schwarze 125: int eqn_inline; /* current equation is inline */
1.223 schwarze 126: int options; /* parse options */
127: int rstacksz; /* current size limit of rstack */
128: int rstackpos; /* position in rstack */
1.227 schwarze 129: int format; /* current file in mdoc or man format */
1.223 schwarze 130: char control; /* control character */
1.79 kristaps 131: };
132:
1.67 kristaps 133: struct roffnode {
134: enum rofft tok; /* type of node */
135: struct roffnode *parent; /* up one in stack */
136: int line; /* parse line */
137: int col; /* parse col */
1.106 kristaps 138: char *name; /* node name, e.g. macro name */
1.79 kristaps 139: char *end; /* end-rules: custom token */
140: int endspan; /* end-rules: next-line or infty */
1.198 schwarze 141: int rule; /* current evaluation rule */
1.67 kristaps 142: };
143:
144: #define ROFF_ARGS struct roff *r, /* parse ctx */ \
1.72 kristaps 145: enum rofft tok, /* tok of macro */ \
1.238 schwarze 146: struct buf *buf, /* input buffer */ \
1.67 kristaps 147: int ln, /* parse line */ \
1.75 kristaps 148: int ppos, /* original pos in buffer */ \
149: int pos, /* current pos in buffer */ \
1.74 kristaps 150: int *offs /* reset offset of buffer data */
1.67 kristaps 151:
152: typedef enum rofferr (*roffproc)(ROFF_ARGS);
153:
154: struct roffmac {
155: const char *name; /* macro name */
1.79 kristaps 156: roffproc proc; /* process new macro */
157: roffproc text; /* process as child text of macro */
158: roffproc sub; /* process as child of macro */
159: int flags;
160: #define ROFFMAC_STRUCT (1 << 0) /* always interpret */
1.85 kristaps 161: struct roffmac *next;
1.67 kristaps 162: };
163:
1.141 kristaps 164: struct predef {
165: const char *name; /* predefined input name */
166: const char *str; /* replacement symbol */
167: };
168:
169: #define PREDEF(__name, __str) \
170: { (__name), (__str) },
171:
1.155 kristaps 172: static enum rofft roffhash_find(const char *, size_t);
173: static void roffhash_init(void);
174: static void roffnode_cleanscope(struct roff *);
175: static void roffnode_pop(struct roff *);
176: static void roffnode_push(struct roff *, enum rofft,
177: const char *, int, int);
1.80 kristaps 178: static enum rofferr roff_block(ROFF_ARGS);
179: static enum rofferr roff_block_text(ROFF_ARGS);
180: static enum rofferr roff_block_sub(ROFF_ARGS);
181: static enum rofferr roff_cblock(ROFF_ARGS);
1.174 kristaps 182: static enum rofferr roff_cc(ROFF_ARGS);
1.195 schwarze 183: static void roff_ccond(struct roff *, int, int);
1.82 kristaps 184: static enum rofferr roff_cond(ROFF_ARGS);
185: static enum rofferr roff_cond_text(ROFF_ARGS);
186: static enum rofferr roff_cond_sub(ROFF_ARGS);
1.92 schwarze 187: static enum rofferr roff_ds(ROFF_ARGS);
1.238 schwarze 188: static enum rofferr roff_eqndelim(struct roff *, struct buf *, int);
1.234 kristaps 189: static int roff_evalcond(struct roff *r, int,
190: const char *, int *);
191: static int roff_evalnum(struct roff *, int,
192: const char *, int *, int *, int);
193: static int roff_evalpar(struct roff *, int,
194: const char *, int *, int *);
1.198 schwarze 195: static int roff_evalstrcond(const char *, int *);
1.155 kristaps 196: static void roff_free1(struct roff *);
1.180 schwarze 197: static void roff_freereg(struct roffreg *);
1.167 kristaps 198: static void roff_freestr(struct roffkv *);
1.212 schwarze 199: static size_t roff_getname(struct roff *, char **, int, int);
1.184 schwarze 200: static int roff_getnum(const char *, int *, int *);
201: static int roff_getop(const char *, int *, char *);
1.181 schwarze 202: static int roff_getregn(const struct roff *,
203: const char *, size_t);
1.192 schwarze 204: static int roff_getregro(const char *name);
1.207 schwarze 205: static const char *roff_getstrn(const struct roff *,
1.94 kristaps 206: const char *, size_t);
1.178 schwarze 207: static enum rofferr roff_it(ROFF_ARGS);
1.103 kristaps 208: static enum rofferr roff_line_ignore(ROFF_ARGS);
1.89 kristaps 209: static enum rofferr roff_nr(ROFF_ARGS);
1.214 schwarze 210: static enum rofft roff_parse(struct roff *, char *, int *,
211: int, int);
1.238 schwarze 212: static enum rofferr roff_parsetext(struct buf *, int, int *);
213: static enum rofferr roff_res(struct roff *, struct buf *, int, int);
1.122 schwarze 214: static enum rofferr roff_rm(ROFF_ARGS);
1.203 schwarze 215: static enum rofferr roff_rr(ROFF_ARGS);
1.94 kristaps 216: static void roff_setstr(struct roff *,
1.106 kristaps 217: const char *, const char *, int);
1.207 schwarze 218: static void roff_setstrn(struct roffkv **, const char *,
1.164 kristaps 219: size_t, const char *, size_t, int);
1.105 kristaps 220: static enum rofferr roff_so(ROFF_ARGS);
1.164 kristaps 221: static enum rofferr roff_tr(ROFF_ARGS);
1.175 schwarze 222: static enum rofferr roff_Dd(ROFF_ARGS);
223: static enum rofferr roff_TH(ROFF_ARGS);
1.109 kristaps 224: static enum rofferr roff_TE(ROFF_ARGS);
225: static enum rofferr roff_TS(ROFF_ARGS);
1.125 kristaps 226: static enum rofferr roff_EQ(ROFF_ARGS);
227: static enum rofferr roff_EN(ROFF_ARGS);
1.112 kristaps 228: static enum rofferr roff_T_(ROFF_ARGS);
1.106 kristaps 229: static enum rofferr roff_userdef(ROFF_ARGS);
1.67 kristaps 230:
1.155 kristaps 231: /* See roffhash_find() */
1.85 kristaps 232:
233: #define ASCII_HI 126
234: #define ASCII_LO 33
235: #define HASHWIDTH (ASCII_HI - ASCII_LO + 1)
236:
237: static struct roffmac *hash[HASHWIDTH];
238:
239: static struct roffmac roffs[ROFF_MAX] = {
1.103 kristaps 240: { "ad", roff_line_ignore, NULL, NULL, 0, NULL },
1.85 kristaps 241: { "am", roff_block, roff_block_text, roff_block_sub, 0, NULL },
242: { "ami", roff_block, roff_block_text, roff_block_sub, 0, NULL },
243: { "am1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.193 schwarze 244: { "as", roff_ds, NULL, NULL, 0, NULL },
1.174 kristaps 245: { "cc", roff_cc, NULL, NULL, 0, NULL },
1.194 schwarze 246: { "ce", roff_line_ignore, NULL, NULL, 0, NULL },
1.85 kristaps 247: { "de", roff_block, roff_block_text, roff_block_sub, 0, NULL },
248: { "dei", roff_block, roff_block_text, roff_block_sub, 0, NULL },
249: { "de1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.92 schwarze 250: { "ds", roff_ds, NULL, NULL, 0, NULL },
1.85 kristaps 251: { "el", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
1.185 schwarze 252: { "fam", roff_line_ignore, NULL, NULL, 0, NULL },
1.186 schwarze 253: { "hw", roff_line_ignore, NULL, NULL, 0, NULL },
1.103 kristaps 254: { "hy", roff_line_ignore, NULL, NULL, 0, NULL },
1.85 kristaps 255: { "ie", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
256: { "if", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
257: { "ig", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.178 schwarze 258: { "it", roff_it, NULL, NULL, 0, NULL },
1.103 kristaps 259: { "ne", roff_line_ignore, NULL, NULL, 0, NULL },
260: { "nh", roff_line_ignore, NULL, NULL, 0, NULL },
1.104 kristaps 261: { "nr", roff_nr, NULL, NULL, 0, NULL },
1.124 schwarze 262: { "ns", roff_line_ignore, NULL, NULL, 0, NULL },
1.229 schwarze 263: { "pl", roff_line_ignore, NULL, NULL, 0, NULL },
1.124 schwarze 264: { "ps", roff_line_ignore, NULL, NULL, 0, NULL },
1.122 schwarze 265: { "rm", roff_rm, NULL, NULL, 0, NULL },
1.203 schwarze 266: { "rr", roff_rr, NULL, NULL, 0, NULL },
1.105 kristaps 267: { "so", roff_so, NULL, NULL, 0, NULL },
1.124 schwarze 268: { "ta", roff_line_ignore, NULL, NULL, 0, NULL },
1.164 kristaps 269: { "tr", roff_tr, NULL, NULL, 0, NULL },
1.175 schwarze 270: { "Dd", roff_Dd, NULL, NULL, 0, NULL },
271: { "TH", roff_TH, NULL, NULL, 0, NULL },
1.109 kristaps 272: { "TS", roff_TS, NULL, NULL, 0, NULL },
273: { "TE", roff_TE, NULL, NULL, 0, NULL },
1.112 kristaps 274: { "T&", roff_T_, NULL, NULL, 0, NULL },
1.125 kristaps 275: { "EQ", roff_EQ, NULL, NULL, 0, NULL },
276: { "EN", roff_EN, NULL, NULL, 0, NULL },
1.85 kristaps 277: { ".", roff_cblock, NULL, NULL, 0, NULL },
1.106 kristaps 278: { NULL, roff_userdef, NULL, NULL, 0, NULL },
1.67 kristaps 279: };
280:
1.200 schwarze 281: /* not currently implemented: Ds em Eq LP Me PP pp Or Rd Sf SH */
1.175 schwarze 282: const char *const __mdoc_reserved[] = {
283: "Ac", "Ad", "An", "Ao", "Ap", "Aq", "Ar", "At",
284: "Bc", "Bd", "Bf", "Bk", "Bl", "Bo", "Bq",
285: "Brc", "Bro", "Brq", "Bsx", "Bt", "Bx",
286: "Cd", "Cm", "Db", "Dc", "Dd", "Dl", "Do", "Dq",
1.200 schwarze 287: "Dt", "Dv", "Dx", "D1",
288: "Ec", "Ed", "Ef", "Ek", "El", "Em",
289: "En", "Eo", "Er", "Es", "Ev", "Ex",
1.175 schwarze 290: "Fa", "Fc", "Fd", "Fl", "Fn", "Fo", "Fr", "Ft", "Fx",
1.200 schwarze 291: "Hf", "Ic", "In", "It", "Lb", "Li", "Lk", "Lp",
292: "Ms", "Mt", "Nd", "Nm", "No", "Ns", "Nx",
1.175 schwarze 293: "Oc", "Oo", "Op", "Os", "Ot", "Ox",
1.200 schwarze 294: "Pa", "Pc", "Pf", "Po", "Pp", "Pq",
295: "Qc", "Ql", "Qo", "Qq", "Re", "Rs", "Rv",
296: "Sc", "Sh", "Sm", "So", "Sq",
1.175 schwarze 297: "Ss", "St", "Sx", "Sy",
298: "Ta", "Tn", "Ud", "Ux", "Va", "Vt", "Xc", "Xo", "Xr",
1.200 schwarze 299: "%A", "%B", "%C", "%D", "%I", "%J", "%N", "%O",
1.175 schwarze 300: "%P", "%Q", "%R", "%T", "%U", "%V",
301: NULL
302: };
303:
1.200 schwarze 304: /* not currently implemented: BT DE DS ME MT PT SY TQ YS */
1.175 schwarze 305: const char *const __man_reserved[] = {
1.200 schwarze 306: "AT", "B", "BI", "BR", "DT",
307: "EE", "EN", "EQ", "EX", "HP", "I", "IB", "IP", "IR",
308: "LP", "OP", "P", "PD", "PP",
309: "R", "RB", "RE", "RI", "RS", "SB", "SH", "SM", "SS",
310: "TE", "TH", "TP", "TS", "T&", "UC", "UE", "UR",
1.175 schwarze 311: NULL
312: };
313:
1.141 kristaps 314: /* Array of injected predefined strings. */
315: #define PREDEFS_MAX 38
316: static const struct predef predefs[PREDEFS_MAX] = {
317: #include "predefs.in"
318: };
319:
1.155 kristaps 320: /* See roffhash_find() */
1.85 kristaps 321: #define ROFF_HASH(p) (p[0] - ASCII_LO)
322:
1.178 schwarze 323: static int roffit_lines; /* number of lines to delay */
324: static char *roffit_macro; /* nil-terminated macro line */
325:
1.207 schwarze 326:
1.85 kristaps 327: static void
1.155 kristaps 328: roffhash_init(void)
1.85 kristaps 329: {
330: struct roffmac *n;
331: int buc, i;
332:
1.106 kristaps 333: for (i = 0; i < (int)ROFF_USERDEF; i++) {
1.85 kristaps 334: assert(roffs[i].name[0] >= ASCII_LO);
335: assert(roffs[i].name[0] <= ASCII_HI);
336:
337: buc = ROFF_HASH(roffs[i].name);
338:
339: if (NULL != (n = hash[buc])) {
340: for ( ; n->next; n = n->next)
341: /* Do nothing. */ ;
342: n->next = &roffs[i];
343: } else
344: hash[buc] = &roffs[i];
345: }
346: }
347:
1.67 kristaps 348: /*
349: * Look up a roff token by its name. Returns ROFF_MAX if no macro by
350: * the nil-terminated string name could be found.
351: */
352: static enum rofft
1.155 kristaps 353: roffhash_find(const char *p, size_t s)
1.67 kristaps 354: {
1.85 kristaps 355: int buc;
356: struct roffmac *n;
1.67 kristaps 357:
1.85 kristaps 358: /*
359: * libroff has an extremely simple hashtable, for the time
360: * being, which simply keys on the first character, which must
361: * be printable, then walks a chain. It works well enough until
362: * optimised.
363: */
364:
365: if (p[0] < ASCII_LO || p[0] > ASCII_HI)
366: return(ROFF_MAX);
367:
368: buc = ROFF_HASH(p);
369:
370: if (NULL == (n = hash[buc]))
371: return(ROFF_MAX);
372: for ( ; n; n = n->next)
1.106 kristaps 373: if (0 == strncmp(n->name, p, s) && '\0' == n->name[(int)s])
1.85 kristaps 374: return((enum rofft)(n - roffs));
1.67 kristaps 375:
376: return(ROFF_MAX);
377: }
378:
379: /*
380: * Pop the current node off of the stack of roff instructions currently
381: * pending.
382: */
383: static void
384: roffnode_pop(struct roff *r)
385: {
386: struct roffnode *p;
387:
1.75 kristaps 388: assert(r->last);
1.207 schwarze 389: p = r->last;
1.82 kristaps 390:
1.75 kristaps 391: r->last = r->last->parent;
1.106 kristaps 392: free(p->name);
393: free(p->end);
1.67 kristaps 394: free(p);
395: }
396:
397: /*
398: * Push a roff node onto the instruction stack. This must later be
399: * removed with roffnode_pop().
400: */
1.98 schwarze 401: static void
1.106 kristaps 402: roffnode_push(struct roff *r, enum rofft tok, const char *name,
403: int line, int col)
1.67 kristaps 404: {
405: struct roffnode *p;
406:
1.98 schwarze 407: p = mandoc_calloc(1, sizeof(struct roffnode));
1.67 kristaps 408: p->tok = tok;
1.106 kristaps 409: if (name)
410: p->name = mandoc_strdup(name);
1.67 kristaps 411: p->parent = r->last;
412: p->line = line;
413: p->col = col;
1.198 schwarze 414: p->rule = p->parent ? p->parent->rule : 0;
1.67 kristaps 415:
416: r->last = p;
417: }
418:
419: static void
420: roff_free1(struct roff *r)
421: {
1.176 schwarze 422: struct tbl_node *tbl;
1.125 kristaps 423: struct eqn_node *e;
1.167 kristaps 424: int i;
1.67 kristaps 425:
1.176 schwarze 426: while (NULL != (tbl = r->first_tbl)) {
427: r->first_tbl = tbl->next;
428: tbl_free(tbl);
1.109 kristaps 429: }
1.113 kristaps 430: r->first_tbl = r->last_tbl = r->tbl = NULL;
431:
1.125 kristaps 432: while (NULL != (e = r->first_eqn)) {
433: r->first_eqn = e->next;
434: eqn_free(e);
435: }
436: r->first_eqn = r->last_eqn = r->eqn = NULL;
437:
1.67 kristaps 438: while (r->last)
439: roffnode_pop(r);
1.109 kristaps 440:
1.223 schwarze 441: free (r->rstack);
442: r->rstack = NULL;
443: r->rstacksz = 0;
444: r->rstackpos = -1;
445:
446: roff_freereg(r->regtab);
447: r->regtab = NULL;
448:
1.167 kristaps 449: roff_freestr(r->strtab);
450: roff_freestr(r->xmbtab);
451: r->strtab = r->xmbtab = NULL;
452:
453: if (r->xtab)
454: for (i = 0; i < 128; i++)
455: free(r->xtab[i].p);
456: free(r->xtab);
457: r->xtab = NULL;
1.67 kristaps 458: }
459:
460: void
461: roff_reset(struct roff *r)
462: {
463:
464: roff_free1(r);
1.227 schwarze 465: r->format = r->options & (MPARSE_MDOC | MPARSE_MAN);
1.174 kristaps 466: r->control = 0;
1.67 kristaps 467: }
468:
469: void
470: roff_free(struct roff *r)
471: {
472:
473: roff_free1(r);
474: free(r);
475: }
476:
477: struct roff *
1.237 schwarze 478: roff_alloc(struct mparse *parse, const struct mchars *mchars, int options)
1.67 kristaps 479: {
480: struct roff *r;
481:
1.98 schwarze 482: r = mandoc_calloc(1, sizeof(struct roff));
1.128 kristaps 483: r->parse = parse;
1.237 schwarze 484: r->mchars = mchars;
1.199 schwarze 485: r->options = options;
1.227 schwarze 486: r->format = options & (MPARSE_MDOC | MPARSE_MAN);
1.82 kristaps 487: r->rstackpos = -1;
1.207 schwarze 488:
1.155 kristaps 489: roffhash_init();
1.141 kristaps 490:
1.67 kristaps 491: return(r);
492: }
493:
1.94 kristaps 494: /*
1.206 schwarze 495: * In the current line, expand escape sequences that tend to get
496: * used in numerical expressions and conditional requests.
497: * Also check the syntax of the remaining escape sequences.
1.154 kristaps 498: */
1.172 schwarze 499: static enum rofferr
1.238 schwarze 500: roff_res(struct roff *r, struct buf *buf, int ln, int pos)
1.94 kristaps 501: {
1.208 schwarze 502: char ubuf[24]; /* buffer to print the number */
1.205 schwarze 503: const char *start; /* start of the string to process */
1.209 schwarze 504: char *stesc; /* start of an escape sequence ('\\') */
1.108 schwarze 505: const char *stnam; /* start of the name, after "[(*" */
506: const char *cp; /* end of the name, e.g. before ']' */
507: const char *res; /* the string to be substituted */
1.238 schwarze 508: char *nbuf; /* new buffer to copy buf->buf to */
1.181 schwarze 509: size_t maxl; /* expected length of the escape name */
510: size_t naml; /* actual length of the escape name */
1.237 schwarze 511: enum mandoc_esc esc; /* type of the escape sequence */
512: int inaml; /* length returned from mandoc_escape() */
1.181 schwarze 513: int expand_count; /* to avoid infinite loops */
1.206 schwarze 514: int npos; /* position in numeric expression */
1.218 schwarze 515: int arg_complete; /* argument not interrupted by eol */
1.206 schwarze 516: char term; /* character terminating the escape */
1.94 kristaps 517:
1.170 schwarze 518: expand_count = 0;
1.238 schwarze 519: start = buf->buf + pos;
1.205 schwarze 520: stesc = strchr(start, '\0') - 1;
521: while (stesc-- > start) {
1.170 schwarze 522:
1.205 schwarze 523: /* Search backwards for the next backslash. */
524:
1.238 schwarze 525: if (*stesc != '\\')
1.205 schwarze 526: continue;
527:
528: /* If it is escaped, skip it. */
529:
530: for (cp = stesc - 1; cp >= start; cp--)
1.238 schwarze 531: if (*cp != '\\')
1.205 schwarze 532: break;
533:
1.238 schwarze 534: if ((stesc - cp) % 2 == 0) {
1.209 schwarze 535: stesc = (char *)cp;
1.205 schwarze 536: continue;
537: }
1.108 schwarze 538:
1.206 schwarze 539: /* Decide whether to expand or to check only. */
1.108 schwarze 540:
1.206 schwarze 541: term = '\0';
1.205 schwarze 542: cp = stesc + 1;
1.181 schwarze 543: switch (*cp) {
1.207 schwarze 544: case '*':
1.181 schwarze 545: res = NULL;
546: break;
1.207 schwarze 547: case 'B':
1.206 schwarze 548: /* FALLTHROUGH */
1.207 schwarze 549: case 'w':
1.206 schwarze 550: term = cp[1];
551: /* FALLTHROUGH */
1.207 schwarze 552: case 'n':
1.181 schwarze 553: res = ubuf;
554: break;
555: default:
1.237 schwarze 556: esc = mandoc_escape(&cp, &stnam, &inaml);
557: if (esc == ESCAPE_ERROR ||
558: (esc == ESCAPE_SPECIAL &&
559: mchars_spec2cp(r->mchars, stnam, inaml) < 0))
1.219 schwarze 560: mandoc_vmsg(MANDOCERR_ESC_BAD,
1.238 schwarze 561: r->parse, ln, (int)(stesc - buf->buf),
1.219 schwarze 562: "%.*s", (int)(cp - stesc), stesc);
1.205 schwarze 563: continue;
1.152 kristaps 564: }
565:
1.205 schwarze 566: if (EXPAND_LIMIT < ++expand_count) {
567: mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
1.238 schwarze 568: ln, (int)(stesc - buf->buf), NULL);
1.205 schwarze 569: return(ROFF_IGN);
570: }
1.108 schwarze 571:
572: /*
573: * The third character decides the length
1.181 schwarze 574: * of the name of the string or register.
1.108 schwarze 575: * Save a pointer to the name.
576: */
577:
1.238 schwarze 578: if (term == '\0') {
1.206 schwarze 579: switch (*++cp) {
1.207 schwarze 580: case '\0':
1.206 schwarze 581: maxl = 0;
582: break;
1.207 schwarze 583: case '(':
1.206 schwarze 584: cp++;
585: maxl = 2;
586: break;
1.207 schwarze 587: case '[':
1.206 schwarze 588: cp++;
589: term = ']';
590: maxl = 0;
591: break;
592: default:
593: maxl = 1;
594: break;
595: }
596: } else {
597: cp += 2;
1.94 kristaps 598: maxl = 0;
599: }
1.108 schwarze 600: stnam = cp;
1.94 kristaps 601:
1.108 schwarze 602: /* Advance to the end of the name. */
1.94 kristaps 603:
1.218 schwarze 604: arg_complete = 1;
1.238 schwarze 605: for (naml = 0; maxl == 0 || naml < maxl; naml++, cp++) {
606: if (*cp == '\0') {
1.219 schwarze 607: mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238 schwarze 608: ln, (int)(stesc - buf->buf), stesc);
1.218 schwarze 609: arg_complete = 0;
1.206 schwarze 610: break;
1.153 kristaps 611: }
1.238 schwarze 612: if (maxl == 0 && *cp == term) {
1.206 schwarze 613: cp++;
1.94 kristaps 614: break;
1.206 schwarze 615: }
1.94 kristaps 616: }
617:
1.108 schwarze 618: /*
619: * Retrieve the replacement string; if it is
620: * undefined, resume searching for escapes.
621: */
622:
1.206 schwarze 623: switch (stesc[1]) {
1.207 schwarze 624: case '*':
1.218 schwarze 625: if (arg_complete)
626: res = roff_getstrn(r, stnam, naml);
1.206 schwarze 627: break;
1.207 schwarze 628: case 'B':
1.206 schwarze 629: npos = 0;
1.218 schwarze 630: ubuf[0] = arg_complete &&
1.234 kristaps 631: roff_evalnum(r, ln, stnam, &npos, NULL, 0) &&
1.218 schwarze 632: stnam + npos + 1 == cp ? '1' : '0';
1.206 schwarze 633: ubuf[1] = '\0';
634: break;
1.207 schwarze 635: case 'n':
1.218 schwarze 636: if (arg_complete)
637: (void)snprintf(ubuf, sizeof(ubuf), "%d",
638: roff_getregn(r, stnam, naml));
639: else
640: ubuf[0] = '\0';
1.206 schwarze 641: break;
1.207 schwarze 642: case 'w':
1.218 schwarze 643: /* use even incomplete args */
1.208 schwarze 644: (void)snprintf(ubuf, sizeof(ubuf), "%d",
1.206 schwarze 645: 24 * (int)naml);
646: break;
647: }
1.94 kristaps 648:
1.238 schwarze 649: if (res == NULL) {
1.219 schwarze 650: mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238 schwarze 651: r->parse, ln, (int)(stesc - buf->buf),
1.219 schwarze 652: "%.*s", (int)naml, stnam);
1.142 kristaps 653: res = "";
1.246 ! schwarze 654: } else if (buf->sz + strlen(res) > SHRT_MAX) {
! 655: mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
! 656: ln, (int)(stesc - buf->buf), NULL);
! 657: return(ROFF_IGN);
1.94 kristaps 658: }
659:
1.108 schwarze 660: /* Replace the escape sequence by the string. */
661:
1.209 schwarze 662: *stesc = '\0';
1.238 schwarze 663: buf->sz = mandoc_asprintf(&nbuf, "%s%s%s",
664: buf->buf, res, cp) + 1;
1.94 kristaps 665:
1.205 schwarze 666: /* Prepare for the next replacement. */
1.94 kristaps 667:
1.205 schwarze 668: start = nbuf + pos;
1.238 schwarze 669: stesc = nbuf + (stesc - buf->buf) + strlen(res);
670: free(buf->buf);
671: buf->buf = nbuf;
1.154 kristaps 672: }
1.172 schwarze 673: return(ROFF_CONT);
1.154 kristaps 674: }
675:
676: /*
1.178 schwarze 677: * Process text streams:
678: * Convert all breakable hyphens into ASCII_HYPH.
679: * Decrement and spring input line trap.
1.154 kristaps 680: */
681: static enum rofferr
1.238 schwarze 682: roff_parsetext(struct buf *buf, int pos, int *offs)
1.154 kristaps 683: {
684: size_t sz;
685: const char *start;
1.178 schwarze 686: char *p;
687: int isz;
1.154 kristaps 688: enum mandoc_esc esc;
689:
1.238 schwarze 690: start = p = buf->buf + pos;
1.154 kristaps 691:
1.238 schwarze 692: while (*p != '\0') {
1.154 kristaps 693: sz = strcspn(p, "-\\");
694: p += sz;
695:
1.238 schwarze 696: if (*p == '\0')
1.159 kristaps 697: break;
698:
1.238 schwarze 699: if (*p == '\\') {
1.154 kristaps 700: /* Skip over escapes. */
701: p++;
1.189 schwarze 702: esc = mandoc_escape((const char **)&p, NULL, NULL);
1.238 schwarze 703: if (esc == ESCAPE_ERROR)
1.154 kristaps 704: break;
1.155 kristaps 705: continue;
1.159 kristaps 706: } else if (p == start) {
1.158 kristaps 707: p++;
1.155 kristaps 708: continue;
1.158 kristaps 709: }
1.155 kristaps 710:
1.171 schwarze 711: if (isalpha((unsigned char)p[-1]) &&
712: isalpha((unsigned char)p[1]))
1.155 kristaps 713: *p = ASCII_HYPH;
714: p++;
1.94 kristaps 715: }
716:
1.178 schwarze 717: /* Spring the input line trap. */
1.238 schwarze 718: if (roffit_lines == 1) {
719: isz = mandoc_asprintf(&p, "%s\n.%s", buf->buf, roffit_macro);
720: free(buf->buf);
721: buf->buf = p;
722: buf->sz = isz + 1;
1.178 schwarze 723: *offs = 0;
724: free(roffit_macro);
725: roffit_lines = 0;
726: return(ROFF_REPARSE);
1.238 schwarze 727: } else if (roffit_lines > 1)
1.178 schwarze 728: --roffit_lines;
1.154 kristaps 729: return(ROFF_CONT);
1.94 kristaps 730: }
731:
1.67 kristaps 732: enum rofferr
1.238 schwarze 733: roff_parseln(struct roff *r, int ln, struct buf *buf, int *offs)
1.67 kristaps 734: {
735: enum rofft t;
1.109 kristaps 736: enum rofferr e;
1.238 schwarze 737: int pos; /* parse point */
1.243 schwarze 738: int spos; /* saved parse point for messages */
1.238 schwarze 739: int ppos; /* original offset in buf->buf */
740: int ctl; /* macro line (boolean) */
741:
742: ppos = pos = *offs;
1.79 kristaps 743:
1.230 schwarze 744: /* Handle in-line equation delimiters. */
745:
1.236 schwarze 746: if (r->tbl == NULL &&
747: r->last_eqn != NULL && r->last_eqn->delim &&
1.230 schwarze 748: (r->eqn == NULL || r->eqn_inline)) {
1.238 schwarze 749: e = roff_eqndelim(r, buf, pos);
1.230 schwarze 750: if (e == ROFF_REPARSE)
751: return(e);
752: assert(e == ROFF_CONT);
753: }
754:
755: /* Expand some escape sequences. */
1.94 kristaps 756:
1.238 schwarze 757: e = roff_res(r, buf, ln, pos);
758: if (e == ROFF_IGN)
1.172 schwarze 759: return(e);
1.238 schwarze 760: assert(e == ROFF_CONT);
1.94 kristaps 761:
1.238 schwarze 762: ctl = roff_getcontrol(r, buf->buf, &pos);
1.130 kristaps 763:
1.94 kristaps 764: /*
1.79 kristaps 765: * First, if a scope is open and we're not a macro, pass the
766: * text through the macro's filter. If a scope isn't open and
767: * we're not a macro, just let it through.
1.125 kristaps 768: * Finally, if there's an equation scope open, divert it into it
769: * no matter our state.
1.79 kristaps 770: */
1.74 kristaps 771:
1.130 kristaps 772: if (r->last && ! ctl) {
1.78 kristaps 773: t = r->last->tok;
774: assert(roffs[t].text);
1.238 schwarze 775: e = (*roffs[t].text)(r, t, buf, ln, pos, pos, offs);
776: assert(e == ROFF_IGN || e == ROFF_CONT);
777: if (e != ROFF_CONT)
1.125 kristaps 778: return(e);
1.182 schwarze 779: }
780: if (r->eqn)
1.238 schwarze 781: return(eqn_read(&r->eqn, ln, buf->buf, ppos, offs));
1.182 schwarze 782: if ( ! ctl) {
1.125 kristaps 783: if (r->tbl)
1.238 schwarze 784: return(tbl_read(r->tbl, ln, buf->buf, pos));
785: return(roff_parsetext(buf, pos, offs));
1.182 schwarze 786: }
1.228 schwarze 787:
788: /* Skip empty request lines. */
789:
1.238 schwarze 790: if (buf->buf[pos] == '"') {
1.228 schwarze 791: mandoc_msg(MANDOCERR_COMMENT_BAD, r->parse,
792: ln, pos, NULL);
793: return(ROFF_IGN);
1.238 schwarze 794: } else if (buf->buf[pos] == '\0')
1.228 schwarze 795: return(ROFF_IGN);
1.67 kristaps 796:
1.79 kristaps 797: /*
798: * If a scope is open, go to the child handler for that macro,
799: * as it may want to preprocess before doing anything with it.
1.125 kristaps 800: * Don't do so if an equation is open.
1.79 kristaps 801: */
1.78 kristaps 802:
1.79 kristaps 803: if (r->last) {
804: t = r->last->tok;
805: assert(roffs[t].sub);
1.238 schwarze 806: return((*roffs[t].sub)(r, t, buf, ln, ppos, pos, offs));
1.79 kristaps 807: }
1.78 kristaps 808:
1.243 schwarze 809: /* No scope is open. This is a new request or macro. */
810:
811: spos = pos;
812: t = roff_parse(r, buf->buf, &pos, ln, ppos);
813:
814: /* Tables ignore most macros. */
815:
816: if (r->tbl != NULL && (t == ROFF_MAX || t == ROFF_TS)) {
817: mandoc_msg(MANDOCERR_TBLMACRO, r->parse,
818: ln, pos, buf->buf + spos);
819: return(ROFF_IGN);
820: }
821:
1.79 kristaps 822: /*
1.243 schwarze 823: * This is neither a roff request nor a user-defined macro.
824: * Let the standard macro set parsers handle it.
1.79 kristaps 825: */
1.67 kristaps 826:
1.243 schwarze 827: if (t == ROFF_MAX)
1.79 kristaps 828: return(ROFF_CONT);
1.243 schwarze 829:
830: /* Execute a roff request or a user defined macro. */
1.67 kristaps 831:
1.75 kristaps 832: assert(roffs[t].proc);
1.238 schwarze 833: return((*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs));
1.74 kristaps 834: }
835:
1.117 kristaps 836: void
1.74 kristaps 837: roff_endparse(struct roff *r)
838: {
839:
1.110 kristaps 840: if (r->last)
1.221 schwarze 841: mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
842: r->last->line, r->last->col,
843: roffs[r->last->tok].name);
1.117 kristaps 844:
1.125 kristaps 845: if (r->eqn) {
1.221 schwarze 846: mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
847: r->eqn->eqn.ln, r->eqn->eqn.pos, "EQ");
1.151 kristaps 848: eqn_end(&r->eqn);
1.125 kristaps 849: }
850:
1.117 kristaps 851: if (r->tbl) {
1.221 schwarze 852: mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
853: r->tbl->line, r->tbl->pos, "TS");
1.151 kristaps 854: tbl_end(&r->tbl);
1.117 kristaps 855: }
1.67 kristaps 856: }
857:
858: /*
859: * Parse a roff node's type from the input buffer. This must be in the
860: * form of ".foo xxx" in the usual way.
861: */
862: static enum rofft
1.214 schwarze 863: roff_parse(struct roff *r, char *buf, int *pos, int ln, int ppos)
1.67 kristaps 864: {
1.214 schwarze 865: char *cp;
1.106 kristaps 866: const char *mac;
867: size_t maclen;
1.67 kristaps 868: enum rofft t;
869:
1.214 schwarze 870: cp = buf + *pos;
871:
872: if ('\0' == *cp || '"' == *cp || '\t' == *cp || ' ' == *cp)
1.67 kristaps 873: return(ROFF_MAX);
874:
1.214 schwarze 875: mac = cp;
876: maclen = roff_getname(r, &cp, ln, ppos);
1.67 kristaps 877:
1.106 kristaps 878: t = (r->current_string = roff_getstrn(r, mac, maclen))
1.155 kristaps 879: ? ROFF_USERDEF : roffhash_find(mac, maclen);
1.67 kristaps 880:
1.214 schwarze 881: if (ROFF_MAX != t)
882: *pos = cp - buf;
1.67 kristaps 883:
884: return(t);
885: }
886:
887: static enum rofferr
1.76 kristaps 888: roff_cblock(ROFF_ARGS)
1.67 kristaps 889: {
890:
1.79 kristaps 891: /*
892: * A block-close `..' should only be invoked as a child of an
893: * ignore macro, otherwise raise a warning and just ignore it.
894: */
895:
1.238 schwarze 896: if (r->last == NULL) {
1.221 schwarze 897: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
898: ln, ppos, "..");
1.76 kristaps 899: return(ROFF_IGN);
900: }
1.67 kristaps 901:
1.81 kristaps 902: switch (r->last->tok) {
1.207 schwarze 903: case ROFF_am:
1.220 schwarze 904: /* ROFF_am1 is remapped to ROFF_am in roff_block(). */
1.81 kristaps 905: /* FALLTHROUGH */
1.207 schwarze 906: case ROFF_ami:
1.81 kristaps 907: /* FALLTHROUGH */
1.207 schwarze 908: case ROFF_de:
1.108 schwarze 909: /* ROFF_de1 is remapped to ROFF_de in roff_block(). */
1.81 kristaps 910: /* FALLTHROUGH */
1.207 schwarze 911: case ROFF_dei:
1.81 kristaps 912: /* FALLTHROUGH */
1.207 schwarze 913: case ROFF_ig:
1.81 kristaps 914: break;
915: default:
1.221 schwarze 916: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
917: ln, ppos, "..");
1.67 kristaps 918: return(ROFF_IGN);
1.76 kristaps 919: }
1.67 kristaps 920:
1.238 schwarze 921: if (buf->buf[pos] != '\0')
1.217 schwarze 922: mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
1.238 schwarze 923: ".. %s", buf->buf + pos);
1.71 kristaps 924:
925: roffnode_pop(r);
1.76 kristaps 926: roffnode_cleanscope(r);
927: return(ROFF_IGN);
1.71 kristaps 928:
1.67 kristaps 929: }
930:
1.76 kristaps 931: static void
932: roffnode_cleanscope(struct roff *r)
1.67 kristaps 933: {
934:
1.76 kristaps 935: while (r->last) {
1.173 schwarze 936: if (--r->last->endspan != 0)
1.76 kristaps 937: break;
938: roffnode_pop(r);
939: }
1.67 kristaps 940: }
941:
1.195 schwarze 942: static void
943: roff_ccond(struct roff *r, int ln, int ppos)
1.74 kristaps 944: {
945:
1.76 kristaps 946: if (NULL == r->last) {
1.221 schwarze 947: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
948: ln, ppos, "\\}");
1.195 schwarze 949: return;
1.76 kristaps 950: }
951:
1.82 kristaps 952: switch (r->last->tok) {
1.207 schwarze 953: case ROFF_el:
1.82 kristaps 954: /* FALLTHROUGH */
1.207 schwarze 955: case ROFF_ie:
1.82 kristaps 956: /* FALLTHROUGH */
1.207 schwarze 957: case ROFF_if:
1.82 kristaps 958: break;
959: default:
1.221 schwarze 960: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
961: ln, ppos, "\\}");
1.195 schwarze 962: return;
1.75 kristaps 963: }
964:
1.76 kristaps 965: if (r->last->endspan > -1) {
1.221 schwarze 966: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
967: ln, ppos, "\\}");
1.195 schwarze 968: return;
1.76 kristaps 969: }
970:
1.75 kristaps 971: roffnode_pop(r);
1.76 kristaps 972: roffnode_cleanscope(r);
1.195 schwarze 973: return;
1.76 kristaps 974: }
975:
976: static enum rofferr
1.80 kristaps 977: roff_block(ROFF_ARGS)
1.76 kristaps 978: {
1.220 schwarze 979: const char *name;
980: char *iname, *cp;
1.213 schwarze 981: size_t namesz;
1.106 kristaps 982:
1.220 schwarze 983: /* Ignore groff compatibility mode for now. */
1.76 kristaps 984:
1.238 schwarze 985: if (tok == ROFF_de1)
1.220 schwarze 986: tok = ROFF_de;
1.238 schwarze 987: else if (tok == ROFF_am1)
1.220 schwarze 988: tok = ROFF_am;
989:
990: /* Parse the macro name argument. */
991:
1.238 schwarze 992: cp = buf->buf + pos;
993: if (tok == ROFF_ig) {
1.220 schwarze 994: iname = NULL;
995: namesz = 0;
996: } else {
997: iname = cp;
998: namesz = roff_getname(r, &cp, ln, ppos);
999: iname[namesz] = '\0';
1000: }
1.107 kristaps 1001:
1.220 schwarze 1002: /* Resolve the macro name argument if it is indirect. */
1.107 kristaps 1003:
1.238 schwarze 1004: if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
1005: if ((name = roff_getstrn(r, iname, namesz)) == NULL) {
1.220 schwarze 1006: mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238 schwarze 1007: r->parse, ln, (int)(iname - buf->buf),
1.220 schwarze 1008: "%.*s", (int)namesz, iname);
1009: namesz = 0;
1010: } else
1011: namesz = strlen(name);
1012: } else
1013: name = iname;
1.107 kristaps 1014:
1.238 schwarze 1015: if (namesz == 0 && tok != ROFF_ig) {
1.220 schwarze 1016: mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse,
1017: ln, ppos, roffs[tok].name);
1018: return(ROFF_IGN);
1019: }
1.80 kristaps 1020:
1.106 kristaps 1021: roffnode_push(r, tok, name, ln, ppos);
1022:
1023: /*
1024: * At the beginning of a `de' macro, clear the existing string
1025: * with the same name, if there is one. New content will be
1.193 schwarze 1026: * appended from roff_block_text() in multiline mode.
1.106 kristaps 1027: */
1.107 kristaps 1028:
1.238 schwarze 1029: if (tok == ROFF_de || tok == ROFF_dei)
1.213 schwarze 1030: roff_setstrn(&r->strtab, name, namesz, "", 0, 0);
1.76 kristaps 1031:
1.238 schwarze 1032: if (*cp == '\0')
1.78 kristaps 1033: return(ROFF_IGN);
1034:
1.220 schwarze 1035: /* Get the custom end marker. */
1.107 kristaps 1036:
1.220 schwarze 1037: iname = cp;
1.213 schwarze 1038: namesz = roff_getname(r, &cp, ln, ppos);
1.220 schwarze 1039:
1040: /* Resolve the end marker if it is indirect. */
1041:
1.238 schwarze 1042: if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
1043: if ((name = roff_getstrn(r, iname, namesz)) == NULL) {
1.220 schwarze 1044: mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238 schwarze 1045: r->parse, ln, (int)(iname - buf->buf),
1.220 schwarze 1046: "%.*s", (int)namesz, iname);
1047: namesz = 0;
1048: } else
1049: namesz = strlen(name);
1050: } else
1051: name = iname;
1052:
1.213 schwarze 1053: if (namesz)
1054: r->last->end = mandoc_strndup(name, namesz);
1.78 kristaps 1055:
1.238 schwarze 1056: if (*cp != '\0')
1.217 schwarze 1057: mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
1058: ln, pos, ".%s ... %s", roffs[tok].name, cp);
1.74 kristaps 1059:
1.78 kristaps 1060: return(ROFF_IGN);
1061: }
1062:
1063: static enum rofferr
1.80 kristaps 1064: roff_block_sub(ROFF_ARGS)
1.79 kristaps 1065: {
1066: enum rofft t;
1067: int i, j;
1068:
1069: /*
1070: * First check whether a custom macro exists at this level. If
1071: * it does, then check against it. This is some of groff's
1072: * stranger behaviours. If we encountered a custom end-scope
1073: * tag and that tag also happens to be a "real" macro, then we
1074: * need to try interpreting it again as a real macro. If it's
1075: * not, then return ignore. Else continue.
1076: */
1077:
1078: if (r->last->end) {
1.130 kristaps 1079: for (i = pos, j = 0; r->last->end[j]; j++, i++)
1.238 schwarze 1080: if (buf->buf[i] != r->last->end[j])
1.79 kristaps 1081: break;
1082:
1.238 schwarze 1083: if (r->last->end[j] == '\0' &&
1084: (buf->buf[i] == '\0' ||
1085: buf->buf[i] == ' ' ||
1086: buf->buf[i] == '\t')) {
1.79 kristaps 1087: roffnode_pop(r);
1088: roffnode_cleanscope(r);
1089:
1.238 schwarze 1090: while (buf->buf[i] == ' ' || buf->buf[i] == '\t')
1.130 kristaps 1091: i++;
1092:
1093: pos = i;
1.238 schwarze 1094: if (roff_parse(r, buf->buf, &pos, ln, ppos) !=
1095: ROFF_MAX)
1.79 kristaps 1096: return(ROFF_RERUN);
1097: return(ROFF_IGN);
1098: }
1099: }
1100:
1101: /*
1102: * If we have no custom end-query or lookup failed, then try
1103: * pulling it out of the hashtable.
1104: */
1105:
1.238 schwarze 1106: t = roff_parse(r, buf->buf, &pos, ln, ppos);
1.79 kristaps 1107:
1.238 schwarze 1108: if (t != ROFF_cblock) {
1109: if (tok != ROFF_ig)
1110: roff_setstr(r, r->last->name, buf->buf + ppos, 2);
1.79 kristaps 1111: return(ROFF_IGN);
1.106 kristaps 1112: }
1.79 kristaps 1113:
1114: assert(roffs[t].proc);
1.238 schwarze 1115: return((*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs));
1.79 kristaps 1116: }
1117:
1118: static enum rofferr
1.80 kristaps 1119: roff_block_text(ROFF_ARGS)
1.78 kristaps 1120: {
1121:
1.238 schwarze 1122: if (tok != ROFF_ig)
1123: roff_setstr(r, r->last->name, buf->buf + pos, 2);
1.106 kristaps 1124:
1.78 kristaps 1125: return(ROFF_IGN);
1126: }
1127:
1128: static enum rofferr
1.82 kristaps 1129: roff_cond_sub(ROFF_ARGS)
1130: {
1131: enum rofft t;
1.139 kristaps 1132: char *ep;
1.198 schwarze 1133: int rr;
1.82 kristaps 1134:
1135: rr = r->last->rule;
1.139 kristaps 1136: roffnode_cleanscope(r);
1.238 schwarze 1137: t = roff_parse(r, buf->buf, &pos, ln, ppos);
1.82 kristaps 1138:
1.139 kristaps 1139: /*
1.177 schwarze 1140: * Fully handle known macros when they are structurally
1141: * required or when the conditional evaluated to true.
1.87 kristaps 1142: */
1143:
1.238 schwarze 1144: if ((t != ROFF_MAX) &&
1145: (rr || roffs[t].flags & ROFFMAC_STRUCT)) {
1.177 schwarze 1146: assert(roffs[t].proc);
1.238 schwarze 1147: return((*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs));
1.177 schwarze 1148: }
1.144 kristaps 1149:
1.196 schwarze 1150: /*
1151: * If `\}' occurs on a macro line without a preceding macro,
1152: * drop the line completely.
1153: */
1154:
1.238 schwarze 1155: ep = buf->buf + pos;
1156: if (ep[0] == '\\' && ep[1] == '}')
1.198 schwarze 1157: rr = 0;
1.196 schwarze 1158:
1.177 schwarze 1159: /* Always check for the closing delimiter `\}'. */
1.144 kristaps 1160:
1.238 schwarze 1161: while ((ep = strchr(ep, '\\')) != NULL) {
1162: if (*(++ep) == '}') {
1.197 schwarze 1163: *ep = '&';
1.238 schwarze 1164: roff_ccond(r, ln, ep - buf->buf - 1);
1.197 schwarze 1165: }
1166: ++ep;
1.177 schwarze 1167: }
1.198 schwarze 1168: return(rr ? ROFF_CONT : ROFF_IGN);
1.82 kristaps 1169: }
1170:
1171: static enum rofferr
1172: roff_cond_text(ROFF_ARGS)
1.78 kristaps 1173: {
1.140 kristaps 1174: char *ep;
1.198 schwarze 1175: int rr;
1.82 kristaps 1176:
1177: rr = r->last->rule;
1.140 kristaps 1178: roffnode_cleanscope(r);
1.82 kristaps 1179:
1.238 schwarze 1180: ep = buf->buf + pos;
1181: while ((ep = strchr(ep, '\\')) != NULL) {
1182: if (*(++ep) == '}') {
1.197 schwarze 1183: *ep = '&';
1.238 schwarze 1184: roff_ccond(r, ln, ep - buf->buf - 1);
1.197 schwarze 1185: }
1186: ++ep;
1.78 kristaps 1187: }
1.198 schwarze 1188: return(rr ? ROFF_CONT : ROFF_IGN);
1.74 kristaps 1189: }
1190:
1.204 schwarze 1191: /*
1192: * Parse a single signed integer number. Stop at the first non-digit.
1193: * If there is at least one digit, return success and advance the
1194: * parse point, else return failure and let the parse point unchanged.
1195: * Ignore overflows, treat them just like the C language.
1196: */
1.184 schwarze 1197: static int
1198: roff_getnum(const char *v, int *pos, int *res)
1199: {
1.206 schwarze 1200: int myres, n, p;
1201:
1202: if (NULL == res)
1203: res = &myres;
1.184 schwarze 1204:
1205: p = *pos;
1206: n = v[p] == '-';
1207: if (n)
1208: p++;
1209:
1210: for (*res = 0; isdigit((unsigned char)v[p]); p++)
1.204 schwarze 1211: *res = 10 * *res + v[p] - '0';
1.184 schwarze 1212: if (p == *pos + n)
1213: return 0;
1214:
1215: if (n)
1216: *res = -*res;
1217:
1218: *pos = p;
1219: return 1;
1220: }
1221:
1.198 schwarze 1222: /*
1223: * Evaluate a string comparison condition.
1224: * The first character is the delimiter.
1225: * Succeed if the string up to its second occurrence
1226: * matches the string up to its third occurence.
1227: * Advance the cursor after the third occurrence
1228: * or lacking that, to the end of the line.
1229: */
1230: static int
1231: roff_evalstrcond(const char *v, int *pos)
1232: {
1233: const char *s1, *s2, *s3;
1234: int match;
1235:
1236: match = 0;
1237: s1 = v + *pos; /* initial delimiter */
1238: s2 = s1 + 1; /* for scanning the first string */
1239: s3 = strchr(s2, *s1); /* for scanning the second string */
1240:
1241: if (NULL == s3) /* found no middle delimiter */
1242: goto out;
1243:
1244: while ('\0' != *++s3) {
1245: if (*s2 != *s3) { /* mismatch */
1246: s3 = strchr(s3, *s1);
1247: break;
1248: }
1249: if (*s3 == *s1) { /* found the final delimiter */
1250: match = 1;
1251: break;
1252: }
1253: s2++;
1254: }
1255:
1256: out:
1257: if (NULL == s3)
1258: s3 = strchr(s2, '\0');
1.242 schwarze 1259: else if (*s3 != '\0')
1.198 schwarze 1260: s3++;
1261: *pos = s3 - v;
1262: return(match);
1263: }
1264:
1.204 schwarze 1265: /*
1266: * Evaluate an optionally negated single character, numerical,
1267: * or string condition.
1268: */
1.198 schwarze 1269: static int
1.234 kristaps 1270: roff_evalcond(struct roff *r, int ln, const char *v, int *pos)
1.88 kristaps 1271: {
1.241 schwarze 1272: int number, savepos, wanttrue;
1.88 kristaps 1273:
1.198 schwarze 1274: if ('!' == v[*pos]) {
1275: wanttrue = 0;
1276: (*pos)++;
1277: } else
1278: wanttrue = 1;
1279:
1.88 kristaps 1280: switch (v[*pos]) {
1.240 schwarze 1281: case '\0':
1282: return(0);
1.207 schwarze 1283: case 'n':
1.198 schwarze 1284: /* FALLTHROUGH */
1.207 schwarze 1285: case 'o':
1.88 kristaps 1286: (*pos)++;
1.198 schwarze 1287: return(wanttrue);
1.207 schwarze 1288: case 'c':
1.198 schwarze 1289: /* FALLTHROUGH */
1.207 schwarze 1290: case 'd':
1.198 schwarze 1291: /* FALLTHROUGH */
1.207 schwarze 1292: case 'e':
1.88 kristaps 1293: /* FALLTHROUGH */
1.207 schwarze 1294: case 'r':
1.88 kristaps 1295: /* FALLTHROUGH */
1.207 schwarze 1296: case 't':
1.239 schwarze 1297: /* FALLTHROUGH */
1298: case 'v':
1.88 kristaps 1299: (*pos)++;
1.198 schwarze 1300: return(!wanttrue);
1.88 kristaps 1301: default:
1302: break;
1303: }
1304:
1.241 schwarze 1305: savepos = *pos;
1.234 kristaps 1306: if (roff_evalnum(r, ln, v, pos, &number, 0))
1.204 schwarze 1307: return((number > 0) == wanttrue);
1.241 schwarze 1308: else if (*pos == savepos)
1309: return(roff_evalstrcond(v, pos) == wanttrue);
1.204 schwarze 1310: else
1.241 schwarze 1311: return (0);
1.88 kristaps 1312: }
1313:
1.74 kristaps 1314: static enum rofferr
1.103 kristaps 1315: roff_line_ignore(ROFF_ARGS)
1.89 kristaps 1316: {
1.123 schwarze 1317:
1.89 kristaps 1318: return(ROFF_IGN);
1319: }
1320:
1.104 kristaps 1321: static enum rofferr
1.82 kristaps 1322: roff_cond(ROFF_ARGS)
1.74 kristaps 1323: {
1.173 schwarze 1324:
1325: roffnode_push(r, tok, NULL, ln, ppos);
1.74 kristaps 1326:
1.207 schwarze 1327: /*
1.134 kristaps 1328: * An `.el' has no conditional body: it will consume the value
1329: * of the current rstack entry set in prior `ie' calls or
1.207 schwarze 1330: * defaults to DENY.
1.134 kristaps 1331: *
1332: * If we're not an `el', however, then evaluate the conditional.
1333: */
1.133 kristaps 1334:
1.238 schwarze 1335: r->last->rule = tok == ROFF_el ?
1.207 schwarze 1336: (r->rstackpos < 0 ? 0 : r->rstack[r->rstackpos--]) :
1.238 schwarze 1337: roff_evalcond(r, ln, buf->buf, &pos);
1.77 kristaps 1338:
1.134 kristaps 1339: /*
1340: * An if-else will put the NEGATION of the current evaluated
1341: * conditional into the stack of rules.
1342: */
1343:
1.238 schwarze 1344: if (tok == ROFF_ie) {
1.223 schwarze 1345: if (r->rstackpos + 1 == r->rstacksz) {
1346: r->rstacksz += 16;
1347: r->rstack = mandoc_reallocarray(r->rstack,
1348: r->rstacksz, sizeof(int));
1.134 kristaps 1349: }
1.198 schwarze 1350: r->rstack[++r->rstackpos] = !r->last->rule;
1.82 kristaps 1351: }
1.88 kristaps 1352:
1353: /* If the parent has false as its rule, then so do we. */
1354:
1.198 schwarze 1355: if (r->last->parent && !r->last->parent->rule)
1356: r->last->rule = 0;
1.88 kristaps 1357:
1358: /*
1.173 schwarze 1359: * Determine scope.
1360: * If there is nothing on the line after the conditional,
1361: * not even whitespace, use next-line scope.
1.88 kristaps 1362: */
1.74 kristaps 1363:
1.238 schwarze 1364: if (buf->buf[pos] == '\0') {
1.173 schwarze 1365: r->last->endspan = 2;
1366: goto out;
1367: }
1368:
1.238 schwarze 1369: while (buf->buf[pos] == ' ')
1.173 schwarze 1370: pos++;
1371:
1372: /* An opening brace requests multiline scope. */
1.75 kristaps 1373:
1.238 schwarze 1374: if (buf->buf[pos] == '\\' && buf->buf[pos + 1] == '{') {
1.75 kristaps 1375: r->last->endspan = -1;
1376: pos += 2;
1.173 schwarze 1377: goto out;
1.207 schwarze 1378: }
1.74 kristaps 1379:
1.77 kristaps 1380: /*
1.173 schwarze 1381: * Anything else following the conditional causes
1382: * single-line scope. Warn if the scope contains
1383: * nothing but trailing whitespace.
1.77 kristaps 1384: */
1385:
1.238 schwarze 1386: if (buf->buf[pos] == '\0')
1.216 schwarze 1387: mandoc_msg(MANDOCERR_COND_EMPTY, r->parse,
1388: ln, ppos, roffs[tok].name);
1.77 kristaps 1389:
1.173 schwarze 1390: r->last->endspan = 1;
1.74 kristaps 1391:
1.173 schwarze 1392: out:
1.75 kristaps 1393: *offs = pos;
1394: return(ROFF_RERUN);
1.83 schwarze 1395: }
1396:
1397: static enum rofferr
1.92 schwarze 1398: roff_ds(ROFF_ARGS)
1399: {
1.212 schwarze 1400: char *string;
1401: const char *name;
1402: size_t namesz;
1.96 kristaps 1403:
1404: /*
1.212 schwarze 1405: * The first word is the name of the string.
1406: * If it is empty or terminated by an escape sequence,
1407: * abort the `ds' request without defining anything.
1.96 kristaps 1408: */
1.92 schwarze 1409:
1.238 schwarze 1410: name = string = buf->buf + pos;
1411: if (*name == '\0')
1.92 schwarze 1412: return(ROFF_IGN);
1413:
1.212 schwarze 1414: namesz = roff_getname(r, &string, ln, pos);
1.238 schwarze 1415: if (name[namesz] == '\\')
1.212 schwarze 1416: return(ROFF_IGN);
1417:
1418: /* Read past the initial double-quote, if any. */
1.238 schwarze 1419: if (*string == '"')
1.92 schwarze 1420: string++;
1421:
1.96 kristaps 1422: /* The rest is the value. */
1.212 schwarze 1423: roff_setstrn(&r->strtab, name, namesz, string, strlen(string),
1424: ROFF_as == tok);
1.92 schwarze 1425: return(ROFF_IGN);
1426: }
1427:
1.204 schwarze 1428: /*
1429: * Parse a single operator, one or two characters long.
1430: * If the operator is recognized, return success and advance the
1431: * parse point, else return failure and let the parse point unchanged.
1432: */
1433: static int
1434: roff_getop(const char *v, int *pos, char *res)
1435: {
1436:
1437: *res = v[*pos];
1438:
1439: switch (*res) {
1.207 schwarze 1440: case '+':
1.204 schwarze 1441: /* FALLTHROUGH */
1.207 schwarze 1442: case '-':
1.204 schwarze 1443: /* FALLTHROUGH */
1.207 schwarze 1444: case '*':
1.204 schwarze 1445: /* FALLTHROUGH */
1.207 schwarze 1446: case '/':
1.204 schwarze 1447: /* FALLTHROUGH */
1.207 schwarze 1448: case '%':
1.204 schwarze 1449: /* FALLTHROUGH */
1.207 schwarze 1450: case '&':
1.204 schwarze 1451: /* FALLTHROUGH */
1.207 schwarze 1452: case ':':
1.204 schwarze 1453: break;
1454: case '<':
1455: switch (v[*pos + 1]) {
1.207 schwarze 1456: case '=':
1.204 schwarze 1457: *res = 'l';
1458: (*pos)++;
1459: break;
1.207 schwarze 1460: case '>':
1.204 schwarze 1461: *res = '!';
1462: (*pos)++;
1463: break;
1.207 schwarze 1464: case '?':
1.204 schwarze 1465: *res = 'i';
1466: (*pos)++;
1467: break;
1468: default:
1469: break;
1470: }
1471: break;
1472: case '>':
1473: switch (v[*pos + 1]) {
1.207 schwarze 1474: case '=':
1.204 schwarze 1475: *res = 'g';
1476: (*pos)++;
1477: break;
1.207 schwarze 1478: case '?':
1.204 schwarze 1479: *res = 'a';
1480: (*pos)++;
1481: break;
1482: default:
1483: break;
1484: }
1485: break;
1486: case '=':
1487: if ('=' == v[*pos + 1])
1488: (*pos)++;
1489: break;
1490: default:
1491: return(0);
1492: }
1493: (*pos)++;
1494:
1495: return(*res);
1496: }
1497:
1498: /*
1499: * Evaluate either a parenthesized numeric expression
1500: * or a single signed integer number.
1501: */
1502: static int
1.235 schwarze 1503: roff_evalpar(struct roff *r, int ln,
1.234 kristaps 1504: const char *v, int *pos, int *res)
1.204 schwarze 1505: {
1506:
1507: if ('(' != v[*pos])
1508: return(roff_getnum(v, pos, res));
1509:
1510: (*pos)++;
1.234 kristaps 1511: if ( ! roff_evalnum(r, ln, v, pos, res, 1))
1.204 schwarze 1512: return(0);
1513:
1.206 schwarze 1514: /*
1515: * Omission of the closing parenthesis
1516: * is an error in validation mode,
1517: * but ignored in evaluation mode.
1518: */
1519:
1.204 schwarze 1520: if (')' == v[*pos])
1521: (*pos)++;
1.206 schwarze 1522: else if (NULL == res)
1523: return(0);
1.204 schwarze 1524:
1525: return(1);
1526: }
1527:
1528: /*
1529: * Evaluate a complete numeric expression.
1530: * Proceed left to right, there is no concept of precedence.
1531: */
1532: static int
1.235 schwarze 1533: roff_evalnum(struct roff *r, int ln, const char *v,
1.234 kristaps 1534: int *pos, int *res, int skipwhite)
1.204 schwarze 1535: {
1536: int mypos, operand2;
1537: char operator;
1538:
1539: if (NULL == pos) {
1540: mypos = 0;
1541: pos = &mypos;
1542: }
1543:
1544: if (skipwhite)
1545: while (isspace((unsigned char)v[*pos]))
1546: (*pos)++;
1547:
1.234 kristaps 1548: if ( ! roff_evalpar(r, ln, v, pos, res))
1.204 schwarze 1549: return(0);
1550:
1551: while (1) {
1552: if (skipwhite)
1553: while (isspace((unsigned char)v[*pos]))
1554: (*pos)++;
1555:
1556: if ( ! roff_getop(v, pos, &operator))
1557: break;
1558:
1559: if (skipwhite)
1560: while (isspace((unsigned char)v[*pos]))
1561: (*pos)++;
1562:
1.234 kristaps 1563: if ( ! roff_evalpar(r, ln, v, pos, &operand2))
1.204 schwarze 1564: return(0);
1565:
1566: if (skipwhite)
1567: while (isspace((unsigned char)v[*pos]))
1568: (*pos)++;
1.206 schwarze 1569:
1570: if (NULL == res)
1571: continue;
1.204 schwarze 1572:
1573: switch (operator) {
1.207 schwarze 1574: case '+':
1.204 schwarze 1575: *res += operand2;
1576: break;
1.207 schwarze 1577: case '-':
1.204 schwarze 1578: *res -= operand2;
1579: break;
1.207 schwarze 1580: case '*':
1.204 schwarze 1581: *res *= operand2;
1582: break;
1.207 schwarze 1583: case '/':
1.244 schwarze 1584: if (operand2 == 0) {
1.235 schwarze 1585: mandoc_msg(MANDOCERR_DIVZERO,
1.234 kristaps 1586: r->parse, ln, *pos, v);
1587: *res = 0;
1588: break;
1589: }
1.204 schwarze 1590: *res /= operand2;
1591: break;
1.207 schwarze 1592: case '%':
1.244 schwarze 1593: if (operand2 == 0) {
1594: mandoc_msg(MANDOCERR_DIVZERO,
1595: r->parse, ln, *pos, v);
1596: *res = 0;
1597: break;
1598: }
1.204 schwarze 1599: *res %= operand2;
1600: break;
1.207 schwarze 1601: case '<':
1.204 schwarze 1602: *res = *res < operand2;
1603: break;
1.207 schwarze 1604: case '>':
1.204 schwarze 1605: *res = *res > operand2;
1606: break;
1.207 schwarze 1607: case 'l':
1.204 schwarze 1608: *res = *res <= operand2;
1609: break;
1.207 schwarze 1610: case 'g':
1.204 schwarze 1611: *res = *res >= operand2;
1612: break;
1.207 schwarze 1613: case '=':
1.204 schwarze 1614: *res = *res == operand2;
1615: break;
1.207 schwarze 1616: case '!':
1.204 schwarze 1617: *res = *res != operand2;
1618: break;
1.207 schwarze 1619: case '&':
1.204 schwarze 1620: *res = *res && operand2;
1621: break;
1.207 schwarze 1622: case ':':
1.204 schwarze 1623: *res = *res || operand2;
1624: break;
1.207 schwarze 1625: case 'i':
1.204 schwarze 1626: if (operand2 < *res)
1627: *res = operand2;
1628: break;
1.207 schwarze 1629: case 'a':
1.204 schwarze 1630: if (operand2 > *res)
1631: *res = operand2;
1632: break;
1633: default:
1634: abort();
1635: }
1636: }
1637: return(1);
1638: }
1639:
1.180 schwarze 1640: void
1.187 schwarze 1641: roff_setreg(struct roff *r, const char *name, int val, char sign)
1.147 kristaps 1642: {
1.180 schwarze 1643: struct roffreg *reg;
1644:
1645: /* Search for an existing register with the same name. */
1646: reg = r->regtab;
1647:
1648: while (reg && strcmp(name, reg->key.p))
1649: reg = reg->next;
1.147 kristaps 1650:
1.180 schwarze 1651: if (NULL == reg) {
1652: /* Create a new register. */
1653: reg = mandoc_malloc(sizeof(struct roffreg));
1654: reg->key.p = mandoc_strdup(name);
1655: reg->key.sz = strlen(name);
1.187 schwarze 1656: reg->val = 0;
1.180 schwarze 1657: reg->next = r->regtab;
1658: r->regtab = reg;
1659: }
1660:
1.187 schwarze 1661: if ('+' == sign)
1662: reg->val += val;
1663: else if ('-' == sign)
1664: reg->val -= val;
1665: else
1666: reg->val = val;
1.147 kristaps 1667: }
1668:
1.192 schwarze 1669: /*
1670: * Handle some predefined read-only number registers.
1671: * For now, return -1 if the requested register is not predefined;
1672: * in case a predefined read-only register having the value -1
1673: * were to turn up, another special value would have to be chosen.
1674: */
1675: static int
1676: roff_getregro(const char *name)
1677: {
1678:
1679: switch (*name) {
1.207 schwarze 1680: case 'A': /* ASCII approximation mode is always off. */
1.192 schwarze 1681: return(0);
1.207 schwarze 1682: case 'g': /* Groff compatibility mode is always on. */
1.192 schwarze 1683: return(1);
1.207 schwarze 1684: case 'H': /* Fixed horizontal resolution. */
1.192 schwarze 1685: return (24);
1.207 schwarze 1686: case 'j': /* Always adjust left margin only. */
1.192 schwarze 1687: return(0);
1.207 schwarze 1688: case 'T': /* Some output device is always defined. */
1.192 schwarze 1689: return(1);
1.207 schwarze 1690: case 'V': /* Fixed vertical resolution. */
1.192 schwarze 1691: return (40);
1692: default:
1693: return (-1);
1694: }
1695: }
1696:
1.181 schwarze 1697: int
1.180 schwarze 1698: roff_getreg(const struct roff *r, const char *name)
1.147 kristaps 1699: {
1.180 schwarze 1700: struct roffreg *reg;
1.192 schwarze 1701: int val;
1702:
1703: if ('.' == name[0] && '\0' != name[1] && '\0' == name[2]) {
1704: val = roff_getregro(name + 1);
1705: if (-1 != val)
1706: return (val);
1707: }
1.180 schwarze 1708:
1709: for (reg = r->regtab; reg; reg = reg->next)
1710: if (0 == strcmp(name, reg->key.p))
1.181 schwarze 1711: return(reg->val);
1712:
1713: return(0);
1714: }
1715:
1716: static int
1717: roff_getregn(const struct roff *r, const char *name, size_t len)
1718: {
1719: struct roffreg *reg;
1.192 schwarze 1720: int val;
1721:
1722: if ('.' == name[0] && 2 == len) {
1723: val = roff_getregro(name + 1);
1724: if (-1 != val)
1725: return (val);
1726: }
1.181 schwarze 1727:
1728: for (reg = r->regtab; reg; reg = reg->next)
1729: if (len == reg->key.sz &&
1730: 0 == strncmp(name, reg->key.p, len))
1731: return(reg->val);
1.147 kristaps 1732:
1.180 schwarze 1733: return(0);
1.147 kristaps 1734: }
1735:
1.180 schwarze 1736: static void
1737: roff_freereg(struct roffreg *reg)
1.147 kristaps 1738: {
1.180 schwarze 1739: struct roffreg *old_reg;
1.147 kristaps 1740:
1.180 schwarze 1741: while (NULL != reg) {
1742: free(reg->key.p);
1743: old_reg = reg;
1744: reg = reg->next;
1745: free(old_reg);
1746: }
1.147 kristaps 1747: }
1.92 schwarze 1748:
1749: static enum rofferr
1.89 kristaps 1750: roff_nr(ROFF_ARGS)
1.83 schwarze 1751: {
1.212 schwarze 1752: char *key, *val;
1753: size_t keysz;
1.138 kristaps 1754: int iv;
1.187 schwarze 1755: char sign;
1.89 kristaps 1756:
1.238 schwarze 1757: key = val = buf->buf + pos;
1758: if (*key == '\0')
1.212 schwarze 1759: return(ROFF_IGN);
1760:
1761: keysz = roff_getname(r, &val, ln, pos);
1.238 schwarze 1762: if (key[keysz] == '\\')
1.212 schwarze 1763: return(ROFF_IGN);
1764: key[keysz] = '\0';
1.89 kristaps 1765:
1.187 schwarze 1766: sign = *val;
1.238 schwarze 1767: if (sign == '+' || sign == '-')
1.187 schwarze 1768: val++;
1769:
1.234 kristaps 1770: if (roff_evalnum(r, ln, val, NULL, &iv, 0))
1.204 schwarze 1771: roff_setreg(r, key, iv, sign);
1.109 kristaps 1772:
1.203 schwarze 1773: return(ROFF_IGN);
1774: }
1775:
1776: static enum rofferr
1777: roff_rr(ROFF_ARGS)
1778: {
1779: struct roffreg *reg, **prev;
1.212 schwarze 1780: char *name, *cp;
1781: size_t namesz;
1.203 schwarze 1782:
1.238 schwarze 1783: name = cp = buf->buf + pos;
1784: if (*name == '\0')
1.212 schwarze 1785: return(ROFF_IGN);
1786: namesz = roff_getname(r, &cp, ln, pos);
1787: name[namesz] = '\0';
1.203 schwarze 1788:
1789: prev = &r->regtab;
1790: while (1) {
1791: reg = *prev;
1.238 schwarze 1792: if (reg == NULL || !strcmp(name, reg->key.p))
1.203 schwarze 1793: break;
1794: prev = ®->next;
1795: }
1.238 schwarze 1796: if (reg != NULL) {
1.203 schwarze 1797: *prev = reg->next;
1798: free(reg->key.p);
1799: free(reg);
1800: }
1.122 schwarze 1801: return(ROFF_IGN);
1802: }
1803:
1804: static enum rofferr
1805: roff_rm(ROFF_ARGS)
1806: {
1807: const char *name;
1808: char *cp;
1.212 schwarze 1809: size_t namesz;
1.122 schwarze 1810:
1.238 schwarze 1811: cp = buf->buf + pos;
1812: while (*cp != '\0') {
1.212 schwarze 1813: name = cp;
1.238 schwarze 1814: namesz = roff_getname(r, &cp, ln, (int)(cp - buf->buf));
1.212 schwarze 1815: roff_setstrn(&r->strtab, name, namesz, NULL, 0, 0);
1.238 schwarze 1816: if (name[namesz] == '\\')
1.212 schwarze 1817: break;
1.122 schwarze 1818: }
1.178 schwarze 1819: return(ROFF_IGN);
1820: }
1821:
1822: static enum rofferr
1823: roff_it(ROFF_ARGS)
1824: {
1825: char *cp;
1826: size_t len;
1827: int iv;
1828:
1829: /* Parse the number of lines. */
1.238 schwarze 1830: cp = buf->buf + pos;
1.178 schwarze 1831: len = strcspn(cp, " \t");
1832: cp[len] = '\0';
1833: if ((iv = mandoc_strntoi(cp, len, 10)) <= 0) {
1.222 schwarze 1834: mandoc_msg(MANDOCERR_IT_NONUM, r->parse,
1.238 schwarze 1835: ln, ppos, buf->buf + 1);
1.178 schwarze 1836: return(ROFF_IGN);
1837: }
1838: cp += len + 1;
1839:
1840: /* Arm the input line trap. */
1841: roffit_lines = iv;
1842: roffit_macro = mandoc_strdup(cp);
1.109 kristaps 1843: return(ROFF_IGN);
1.175 schwarze 1844: }
1845:
1846: static enum rofferr
1847: roff_Dd(ROFF_ARGS)
1848: {
1849: const char *const *cp;
1850:
1.227 schwarze 1851: if ((r->options & (MPARSE_MDOC | MPARSE_QUICK)) == 0)
1.175 schwarze 1852: for (cp = __mdoc_reserved; *cp; cp++)
1853: roff_setstr(r, *cp, NULL, 0);
1854:
1.227 schwarze 1855: if (r->format == 0)
1856: r->format = MPARSE_MDOC;
1857:
1.175 schwarze 1858: return(ROFF_CONT);
1859: }
1860:
1861: static enum rofferr
1862: roff_TH(ROFF_ARGS)
1863: {
1864: const char *const *cp;
1865:
1.227 schwarze 1866: if ((r->options & MPARSE_QUICK) == 0)
1.175 schwarze 1867: for (cp = __man_reserved; *cp; cp++)
1868: roff_setstr(r, *cp, NULL, 0);
1869:
1.227 schwarze 1870: if (r->format == 0)
1871: r->format = MPARSE_MAN;
1872:
1.175 schwarze 1873: return(ROFF_CONT);
1.109 kristaps 1874: }
1875:
1876: static enum rofferr
1877: roff_TE(ROFF_ARGS)
1878: {
1879:
1880: if (NULL == r->tbl)
1.221 schwarze 1881: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
1882: ln, ppos, "TE");
1.115 kristaps 1883: else
1.151 kristaps 1884: tbl_end(&r->tbl);
1.109 kristaps 1885:
1.112 kristaps 1886: return(ROFF_IGN);
1887: }
1888:
1889: static enum rofferr
1890: roff_T_(ROFF_ARGS)
1891: {
1892:
1893: if (NULL == r->tbl)
1.221 schwarze 1894: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
1895: ln, ppos, "T&");
1.112 kristaps 1896: else
1.116 kristaps 1897: tbl_restart(ppos, ln, r->tbl);
1.112 kristaps 1898:
1.109 kristaps 1899: return(ROFF_IGN);
1900: }
1901:
1.230 schwarze 1902: /*
1903: * Handle in-line equation delimiters.
1904: */
1905: static enum rofferr
1.238 schwarze 1906: roff_eqndelim(struct roff *r, struct buf *buf, int pos)
1.151 kristaps 1907: {
1.233 schwarze 1908: char *cp1, *cp2;
1909: const char *bef_pr, *bef_nl, *mac, *aft_nl, *aft_pr;
1.151 kristaps 1910:
1.230 schwarze 1911: /*
1912: * Outside equations, look for an opening delimiter.
1913: * If we are inside an equation, we already know it is
1914: * in-line, or this function wouldn't have been called;
1915: * so look for a closing delimiter.
1916: */
1917:
1.238 schwarze 1918: cp1 = buf->buf + pos;
1.230 schwarze 1919: cp2 = strchr(cp1, r->eqn == NULL ?
1920: r->last_eqn->odelim : r->last_eqn->cdelim);
1921: if (cp2 == NULL)
1922: return(ROFF_CONT);
1923:
1.233 schwarze 1924: *cp2++ = '\0';
1925: bef_pr = bef_nl = aft_nl = aft_pr = "";
1926:
1927: /* Handle preceding text, protecting whitespace. */
1928:
1.238 schwarze 1929: if (*buf->buf != '\0') {
1.233 schwarze 1930: if (r->eqn == NULL)
1931: bef_pr = "\\&";
1932: bef_nl = "\n";
1933: }
1934:
1935: /*
1936: * Prepare replacing the delimiter with an equation macro
1937: * and drop leading white space from the equation.
1938: */
1.230 schwarze 1939:
1.233 schwarze 1940: if (r->eqn == NULL) {
1941: while (*cp2 == ' ')
1942: cp2++;
1943: mac = ".EQ";
1944: } else
1945: mac = ".EN";
1946:
1947: /* Handle following text, protecting whitespace. */
1948:
1949: if (*cp2 != '\0') {
1950: aft_nl = "\n";
1951: if (r->eqn != NULL)
1952: aft_pr = "\\&";
1953: }
1954:
1955: /* Do the actual replacement. */
1956:
1.238 schwarze 1957: buf->sz = mandoc_asprintf(&cp1, "%s%s%s%s%s%s%s", buf->buf,
1.233 schwarze 1958: bef_pr, bef_nl, mac, aft_nl, aft_pr, cp2) + 1;
1.238 schwarze 1959: free(buf->buf);
1960: buf->buf = cp1;
1.230 schwarze 1961:
1962: /* Toggle the in-line state of the eqn subsystem. */
1963:
1964: r->eqn_inline = r->eqn == NULL;
1965: return(ROFF_REPARSE);
1.151 kristaps 1966: }
1967:
1.235 schwarze 1968: static enum rofferr
1969: roff_EQ(ROFF_ARGS)
1.125 kristaps 1970: {
1.151 kristaps 1971: struct eqn_node *e;
1.125 kristaps 1972:
1.238 schwarze 1973: assert(r->eqn == NULL);
1.235 schwarze 1974: e = eqn_alloc(ppos, ln, r->parse);
1.125 kristaps 1975:
1.230 schwarze 1976: if (r->last_eqn) {
1.125 kristaps 1977: r->last_eqn->next = e;
1.230 schwarze 1978: e->delim = r->last_eqn->delim;
1979: e->odelim = r->last_eqn->odelim;
1980: e->cdelim = r->last_eqn->cdelim;
1981: } else
1.125 kristaps 1982: r->first_eqn = r->last_eqn = e;
1983:
1984: r->eqn = r->last_eqn = e;
1.151 kristaps 1985:
1.238 schwarze 1986: if (buf->buf[pos] != '\0')
1.235 schwarze 1987: mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
1.238 schwarze 1988: ".EQ %s", buf->buf + pos);
1.151 kristaps 1989:
1.125 kristaps 1990: return(ROFF_IGN);
1991: }
1992:
1993: static enum rofferr
1994: roff_EN(ROFF_ARGS)
1995: {
1996:
1.221 schwarze 1997: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse, ln, ppos, "EN");
1.125 kristaps 1998: return(ROFF_IGN);
1999: }
2000:
2001: static enum rofferr
1.109 kristaps 2002: roff_TS(ROFF_ARGS)
2003: {
1.176 schwarze 2004: struct tbl_node *tbl;
1.89 kristaps 2005:
1.115 kristaps 2006: if (r->tbl) {
1.221 schwarze 2007: mandoc_msg(MANDOCERR_BLK_BROKEN, r->parse,
2008: ln, ppos, "TS breaks TS");
1.151 kristaps 2009: tbl_end(&r->tbl);
1.115 kristaps 2010: }
1.83 schwarze 2011:
1.176 schwarze 2012: tbl = tbl_alloc(ppos, ln, r->parse);
1.113 kristaps 2013:
2014: if (r->last_tbl)
1.176 schwarze 2015: r->last_tbl->next = tbl;
1.113 kristaps 2016: else
1.176 schwarze 2017: r->first_tbl = r->last_tbl = tbl;
1.113 kristaps 2018:
1.176 schwarze 2019: r->tbl = r->last_tbl = tbl;
1.83 schwarze 2020: return(ROFF_IGN);
1.92 schwarze 2021: }
2022:
1.105 kristaps 2023: static enum rofferr
1.174 kristaps 2024: roff_cc(ROFF_ARGS)
2025: {
2026: const char *p;
2027:
1.238 schwarze 2028: p = buf->buf + pos;
1.174 kristaps 2029:
1.238 schwarze 2030: if (*p == '\0' || (r->control = *p++) == '.')
1.174 kristaps 2031: r->control = 0;
2032:
1.238 schwarze 2033: if (*p != '\0')
1.174 kristaps 2034: mandoc_msg(MANDOCERR_ARGCOUNT, r->parse, ln, ppos, NULL);
2035:
2036: return(ROFF_IGN);
2037: }
2038:
2039: static enum rofferr
1.164 kristaps 2040: roff_tr(ROFF_ARGS)
2041: {
2042: const char *p, *first, *second;
2043: size_t fsz, ssz;
2044: enum mandoc_esc esc;
2045:
1.238 schwarze 2046: p = buf->buf + pos;
1.164 kristaps 2047:
1.238 schwarze 2048: if (*p == '\0') {
1.164 kristaps 2049: mandoc_msg(MANDOCERR_ARGCOUNT, r->parse, ln, ppos, NULL);
2050: return(ROFF_IGN);
2051: }
2052:
1.238 schwarze 2053: while (*p != '\0') {
1.164 kristaps 2054: fsz = ssz = 1;
2055:
2056: first = p++;
1.238 schwarze 2057: if (*first == '\\') {
1.164 kristaps 2058: esc = mandoc_escape(&p, NULL, NULL);
1.238 schwarze 2059: if (esc == ESCAPE_ERROR) {
1.219 schwarze 2060: mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238 schwarze 2061: ln, (int)(p - buf->buf), first);
1.164 kristaps 2062: return(ROFF_IGN);
2063: }
2064: fsz = (size_t)(p - first);
2065: }
2066:
2067: second = p++;
1.238 schwarze 2068: if (*second == '\\') {
1.164 kristaps 2069: esc = mandoc_escape(&p, NULL, NULL);
1.238 schwarze 2070: if (esc == ESCAPE_ERROR) {
1.219 schwarze 2071: mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238 schwarze 2072: ln, (int)(p - buf->buf), second);
1.164 kristaps 2073: return(ROFF_IGN);
2074: }
2075: ssz = (size_t)(p - second);
1.238 schwarze 2076: } else if (*second == '\0') {
1.207 schwarze 2077: mandoc_msg(MANDOCERR_ARGCOUNT, r->parse,
1.238 schwarze 2078: ln, (int)(p - buf->buf), NULL);
1.164 kristaps 2079: second = " ";
1.165 kristaps 2080: p--;
1.164 kristaps 2081: }
2082:
1.167 kristaps 2083: if (fsz > 1) {
1.207 schwarze 2084: roff_setstrn(&r->xmbtab, first, fsz,
2085: second, ssz, 0);
1.167 kristaps 2086: continue;
2087: }
2088:
1.238 schwarze 2089: if (r->xtab == NULL)
1.207 schwarze 2090: r->xtab = mandoc_calloc(128,
2091: sizeof(struct roffstr));
1.167 kristaps 2092:
2093: free(r->xtab[(int)*first].p);
2094: r->xtab[(int)*first].p = mandoc_strndup(second, ssz);
2095: r->xtab[(int)*first].sz = ssz;
1.164 kristaps 2096: }
2097:
2098: return(ROFF_IGN);
2099: }
2100:
2101: static enum rofferr
1.105 kristaps 2102: roff_so(ROFF_ARGS)
2103: {
2104: char *name;
2105:
1.238 schwarze 2106: name = buf->buf + pos;
1.224 schwarze 2107: mandoc_vmsg(MANDOCERR_SO, r->parse, ln, ppos, "so %s", name);
1.105 kristaps 2108:
2109: /*
2110: * Handle `so'. Be EXTREMELY careful, as we shouldn't be
2111: * opening anything that's not in our cwd or anything beneath
2112: * it. Thus, explicitly disallow traversing up the file-system
2113: * or using absolute paths.
2114: */
2115:
1.238 schwarze 2116: if (*name == '/' || strstr(name, "../") || strstr(name, "/..")) {
1.210 schwarze 2117: mandoc_vmsg(MANDOCERR_SO_PATH, r->parse, ln, ppos,
2118: ".so %s", name);
1.105 kristaps 2119: return(ROFF_ERR);
2120: }
2121:
2122: *offs = pos;
2123: return(ROFF_SO);
2124: }
1.92 schwarze 2125:
1.106 kristaps 2126: static enum rofferr
2127: roff_userdef(ROFF_ARGS)
1.99 kristaps 2128: {
1.106 kristaps 2129: const char *arg[9];
2130: char *cp, *n1, *n2;
1.119 schwarze 2131: int i;
1.106 kristaps 2132:
2133: /*
2134: * Collect pointers to macro argument strings
1.188 schwarze 2135: * and NUL-terminate them.
1.106 kristaps 2136: */
1.238 schwarze 2137: cp = buf->buf + pos;
1.119 schwarze 2138: for (i = 0; i < 9; i++)
1.238 schwarze 2139: arg[i] = *cp == '\0' ? "" :
1.136 kristaps 2140: mandoc_getarg(r->parse, &cp, ln, &pos);
1.99 kristaps 2141:
1.106 kristaps 2142: /*
2143: * Expand macro arguments.
1.99 kristaps 2144: */
1.238 schwarze 2145: buf->sz = 0;
1.106 kristaps 2146: n1 = cp = mandoc_strdup(r->current_string);
1.238 schwarze 2147: while ((cp = strstr(cp, "\\$")) != NULL) {
1.106 kristaps 2148: i = cp[2] - '1';
2149: if (0 > i || 8 < i) {
2150: /* Not an argument invocation. */
2151: cp += 2;
2152: continue;
2153: }
1.209 schwarze 2154: *cp = '\0';
1.238 schwarze 2155: buf->sz = mandoc_asprintf(&n2, "%s%s%s",
1.209 schwarze 2156: n1, arg[i], cp + 3) + 1;
1.106 kristaps 2157: cp = n2 + (cp - n1);
2158: free(n1);
2159: n1 = n2;
1.99 kristaps 2160: }
2161:
1.106 kristaps 2162: /*
2163: * Replace the macro invocation
2164: * by the expanded macro.
2165: */
1.238 schwarze 2166: free(buf->buf);
2167: buf->buf = n1;
2168: if (buf->sz == 0)
2169: buf->sz = strlen(buf->buf) + 1;
1.106 kristaps 2170:
1.238 schwarze 2171: return(buf->sz > 1 && buf->buf[buf->sz - 2] == '\n' ?
1.106 kristaps 2172: ROFF_REPARSE : ROFF_APPEND);
1.99 kristaps 2173: }
1.121 schwarze 2174:
1.212 schwarze 2175: static size_t
1.121 schwarze 2176: roff_getname(struct roff *r, char **cpp, int ln, int pos)
2177: {
2178: char *name, *cp;
1.212 schwarze 2179: size_t namesz;
1.121 schwarze 2180:
2181: name = *cpp;
2182: if ('\0' == *name)
1.212 schwarze 2183: return(0);
1.121 schwarze 2184:
1.212 schwarze 2185: /* Read until end of name and terminate it with NUL. */
2186: for (cp = name; 1; cp++) {
2187: if ('\0' == *cp || ' ' == *cp) {
2188: namesz = cp - name;
2189: break;
2190: }
1.121 schwarze 2191: if ('\\' != *cp)
2192: continue;
1.215 schwarze 2193: namesz = cp - name;
2194: if ('{' == cp[1] || '}' == cp[1])
2195: break;
1.121 schwarze 2196: cp++;
2197: if ('\\' == *cp)
2198: continue;
1.224 schwarze 2199: mandoc_vmsg(MANDOCERR_NAMESC, r->parse, ln, pos,
2200: "%.*s", (int)(cp - name + 1), name);
1.212 schwarze 2201: mandoc_escape((const char **)&cp, NULL, NULL);
2202: break;
1.121 schwarze 2203: }
2204:
2205: /* Read past spaces. */
2206: while (' ' == *cp)
2207: cp++;
2208:
2209: *cpp = cp;
1.212 schwarze 2210: return(namesz);
1.121 schwarze 2211: }
2212:
1.106 kristaps 2213: /*
2214: * Store *string into the user-defined string called *name.
2215: * To clear an existing entry, call with (*r, *name, NULL, 0).
1.193 schwarze 2216: * append == 0: replace mode
2217: * append == 1: single-line append mode
2218: * append == 2: multiline append mode, append '\n' after each call
1.106 kristaps 2219: */
1.94 kristaps 2220: static void
1.106 kristaps 2221: roff_setstr(struct roff *r, const char *name, const char *string,
1.193 schwarze 2222: int append)
1.92 schwarze 2223: {
1.164 kristaps 2224:
2225: roff_setstrn(&r->strtab, name, strlen(name), string,
1.207 schwarze 2226: string ? strlen(string) : 0, append);
1.164 kristaps 2227: }
2228:
2229: static void
1.166 kristaps 2230: roff_setstrn(struct roffkv **r, const char *name, size_t namesz,
1.193 schwarze 2231: const char *string, size_t stringsz, int append)
1.164 kristaps 2232: {
1.166 kristaps 2233: struct roffkv *n;
1.164 kristaps 2234: char *c;
2235: int i;
2236: size_t oldch, newch;
1.92 schwarze 2237:
1.106 kristaps 2238: /* Search for an existing string with the same name. */
1.164 kristaps 2239: n = *r;
2240:
1.211 schwarze 2241: while (n && (namesz != n->key.sz ||
2242: strncmp(n->key.p, name, namesz)))
1.92 schwarze 2243: n = n->next;
1.94 kristaps 2244:
2245: if (NULL == n) {
1.106 kristaps 2246: /* Create a new string table entry. */
1.166 kristaps 2247: n = mandoc_malloc(sizeof(struct roffkv));
2248: n->key.p = mandoc_strndup(name, namesz);
2249: n->key.sz = namesz;
2250: n->val.p = NULL;
2251: n->val.sz = 0;
1.164 kristaps 2252: n->next = *r;
2253: *r = n;
1.193 schwarze 2254: } else if (0 == append) {
1.166 kristaps 2255: free(n->val.p);
2256: n->val.p = NULL;
2257: n->val.sz = 0;
1.106 kristaps 2258: }
2259:
2260: if (NULL == string)
2261: return;
2262:
2263: /*
2264: * One additional byte for the '\n' in multiline mode,
2265: * and one for the terminating '\0'.
2266: */
1.193 schwarze 2267: newch = stringsz + (1 < append ? 2u : 1u);
1.164 kristaps 2268:
1.166 kristaps 2269: if (NULL == n->val.p) {
2270: n->val.p = mandoc_malloc(newch);
2271: *n->val.p = '\0';
1.106 kristaps 2272: oldch = 0;
2273: } else {
1.166 kristaps 2274: oldch = n->val.sz;
2275: n->val.p = mandoc_realloc(n->val.p, oldch + newch);
1.106 kristaps 2276: }
2277:
2278: /* Skip existing content in the destination buffer. */
1.166 kristaps 2279: c = n->val.p + (int)oldch;
1.106 kristaps 2280:
2281: /* Append new content to the destination buffer. */
1.164 kristaps 2282: i = 0;
2283: while (i < (int)stringsz) {
1.106 kristaps 2284: /*
2285: * Rudimentary roff copy mode:
2286: * Handle escaped backslashes.
2287: */
1.164 kristaps 2288: if ('\\' == string[i] && '\\' == string[i + 1])
2289: i++;
2290: *c++ = string[i++];
1.106 kristaps 2291: }
1.94 kristaps 2292:
1.106 kristaps 2293: /* Append terminating bytes. */
1.193 schwarze 2294: if (1 < append)
1.106 kristaps 2295: *c++ = '\n';
1.163 kristaps 2296:
1.106 kristaps 2297: *c = '\0';
1.166 kristaps 2298: n->val.sz = (int)(c - n->val.p);
1.92 schwarze 2299: }
2300:
1.94 kristaps 2301: static const char *
2302: roff_getstrn(const struct roff *r, const char *name, size_t len)
1.92 schwarze 2303: {
1.166 kristaps 2304: const struct roffkv *n;
1.191 schwarze 2305: int i;
1.92 schwarze 2306:
1.164 kristaps 2307: for (n = r->strtab; n; n = n->next)
1.207 schwarze 2308: if (0 == strncmp(name, n->key.p, len) &&
2309: '\0' == n->key.p[(int)len])
1.166 kristaps 2310: return(n->val.p);
1.191 schwarze 2311:
2312: for (i = 0; i < PREDEFS_MAX; i++)
2313: if (0 == strncmp(name, predefs[i].name, len) &&
2314: '\0' == predefs[i].name[(int)len])
2315: return(predefs[i].str);
1.94 kristaps 2316:
1.157 kristaps 2317: return(NULL);
1.92 schwarze 2318: }
2319:
1.94 kristaps 2320: static void
1.167 kristaps 2321: roff_freestr(struct roffkv *r)
1.92 schwarze 2322: {
1.166 kristaps 2323: struct roffkv *n, *nn;
1.92 schwarze 2324:
1.167 kristaps 2325: for (n = r; n; n = nn) {
1.166 kristaps 2326: free(n->key.p);
2327: free(n->val.p);
1.92 schwarze 2328: nn = n->next;
2329: free(n);
2330: }
1.114 kristaps 2331: }
2332:
2333: const struct tbl_span *
2334: roff_span(const struct roff *r)
2335: {
1.207 schwarze 2336:
1.114 kristaps 2337: return(r->tbl ? tbl_span(r->tbl) : NULL);
1.125 kristaps 2338: }
2339:
2340: const struct eqn *
2341: roff_eqn(const struct roff *r)
2342: {
1.207 schwarze 2343:
1.125 kristaps 2344: return(r->last_eqn ? &r->last_eqn->eqn : NULL);
1.164 kristaps 2345: }
2346:
2347: /*
2348: * Duplicate an input string, making the appropriate character
2349: * conversations (as stipulated by `tr') along the way.
2350: * Returns a heap-allocated string with all the replacements made.
2351: */
2352: char *
2353: roff_strdup(const struct roff *r, const char *p)
2354: {
1.166 kristaps 2355: const struct roffkv *cp;
1.164 kristaps 2356: char *res;
2357: const char *pp;
2358: size_t ssz, sz;
2359: enum mandoc_esc esc;
2360:
1.167 kristaps 2361: if (NULL == r->xmbtab && NULL == r->xtab)
1.164 kristaps 2362: return(mandoc_strdup(p));
2363: else if ('\0' == *p)
2364: return(mandoc_strdup(""));
2365:
2366: /*
2367: * Step through each character looking for term matches
2368: * (remember that a `tr' can be invoked with an escape, which is
2369: * a glyph but the escape is multi-character).
2370: * We only do this if the character hash has been initialised
2371: * and the string is >0 length.
2372: */
2373:
2374: res = NULL;
2375: ssz = 0;
2376:
2377: while ('\0' != *p) {
1.167 kristaps 2378: if ('\\' != *p && r->xtab && r->xtab[(int)*p].p) {
2379: sz = r->xtab[(int)*p].sz;
2380: res = mandoc_realloc(res, ssz + sz + 1);
2381: memcpy(res + ssz, r->xtab[(int)*p].p, sz);
2382: ssz += sz;
2383: p++;
2384: continue;
2385: } else if ('\\' != *p) {
2386: res = mandoc_realloc(res, ssz + 2);
2387: res[ssz++] = *p++;
2388: continue;
2389: }
2390:
1.164 kristaps 2391: /* Search for term matches. */
1.167 kristaps 2392: for (cp = r->xmbtab; cp; cp = cp->next)
1.166 kristaps 2393: if (0 == strncmp(p, cp->key.p, cp->key.sz))
1.164 kristaps 2394: break;
2395:
2396: if (NULL != cp) {
2397: /*
2398: * A match has been found.
2399: * Append the match to the array and move
2400: * forward by its keysize.
2401: */
1.207 schwarze 2402: res = mandoc_realloc(res,
2403: ssz + cp->val.sz + 1);
1.166 kristaps 2404: memcpy(res + ssz, cp->val.p, cp->val.sz);
2405: ssz += cp->val.sz;
2406: p += (int)cp->key.sz;
1.164 kristaps 2407: continue;
2408: }
2409:
1.167 kristaps 2410: /*
2411: * Handle escapes carefully: we need to copy
2412: * over just the escape itself, or else we might
2413: * do replacements within the escape itself.
2414: * Make sure to pass along the bogus string.
2415: */
2416: pp = p++;
2417: esc = mandoc_escape(&p, NULL, NULL);
2418: if (ESCAPE_ERROR == esc) {
2419: sz = strlen(pp);
1.164 kristaps 2420: res = mandoc_realloc(res, ssz + sz + 1);
2421: memcpy(res + ssz, pp, sz);
1.167 kristaps 2422: break;
1.164 kristaps 2423: }
1.207 schwarze 2424: /*
2425: * We bail out on bad escapes.
1.167 kristaps 2426: * No need to warn: we already did so when
2427: * roff_res() was called.
2428: */
2429: sz = (int)(p - pp);
2430: res = mandoc_realloc(res, ssz + sz + 1);
2431: memcpy(res + ssz, pp, sz);
2432: ssz += sz;
1.164 kristaps 2433: }
2434:
2435: res[(int)ssz] = '\0';
2436: return(res);
1.227 schwarze 2437: }
2438:
2439: int
2440: roff_getformat(const struct roff *r)
2441: {
2442:
2443: return(r->format);
1.174 kristaps 2444: }
2445:
2446: /*
1.207 schwarze 2447: * Find out whether a line is a macro line or not.
1.174 kristaps 2448: * If it is, adjust the current position and return one; if it isn't,
2449: * return zero and don't change the current position.
2450: * If the control character has been set with `.cc', then let that grain
2451: * precedence.
2452: * This is slighly contrary to groff, where using the non-breaking
2453: * control character when `cc' has been invoked will cause the
2454: * non-breaking macro contents to be printed verbatim.
2455: */
2456: int
2457: roff_getcontrol(const struct roff *r, const char *cp, int *ppos)
2458: {
2459: int pos;
2460:
2461: pos = *ppos;
2462:
2463: if (0 != r->control && cp[pos] == r->control)
2464: pos++;
2465: else if (0 != r->control)
2466: return(0);
2467: else if ('\\' == cp[pos] && '.' == cp[pos + 1])
2468: pos += 2;
2469: else if ('.' == cp[pos] || '\'' == cp[pos])
2470: pos++;
2471: else
2472: return(0);
2473:
2474: while (' ' == cp[pos] || '\t' == cp[pos])
2475: pos++;
2476:
2477: *ppos = pos;
2478: return(1);
1.74 kristaps 2479: }
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