Annotation of src/usr.bin/mandoc/roff.c, Revision 1.32
1.32 ! schwarze 1: /* $Id: roff.c,v 1.31 2011/01/25 00:23:23 schwarze Exp $ */
1.1 schwarze 2: /*
1.27 schwarze 3: * Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.25 schwarze 4: * Copyright (c) 2010, 2011 Ingo Schwarze <schwarze@openbsd.org>
1.1 schwarze 5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
1.16 schwarze 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.1 schwarze 11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.16 schwarze 12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.1 schwarze 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.
17: */
18: #include <assert.h>
1.6 schwarze 19: #include <errno.h>
1.3 schwarze 20: #include <ctype.h>
1.6 schwarze 21: #include <limits.h>
1.1 schwarze 22: #include <stdlib.h>
23: #include <string.h>
1.2 schwarze 24: #include <stdio.h>
1.1 schwarze 25:
26: #include "mandoc.h"
27: #include "roff.h"
1.27 schwarze 28: #include "libroff.h"
1.8 schwarze 29: #include "libmandoc.h"
1.1 schwarze 30:
1.2 schwarze 31: #define RSTACK_MAX 128
32:
33: #define ROFF_CTL(c) \
34: ('.' == (c) || '\'' == (c))
35:
1.1 schwarze 36: enum rofft {
1.20 schwarze 37: ROFF_ad,
1.2 schwarze 38: ROFF_am,
39: ROFF_ami,
40: ROFF_am1,
1.1 schwarze 41: ROFF_de,
42: ROFF_dei,
1.2 schwarze 43: ROFF_de1,
44: ROFF_ds,
45: ROFF_el,
1.20 schwarze 46: ROFF_hy,
1.2 schwarze 47: ROFF_ie,
48: ROFF_if,
1.1 schwarze 49: ROFF_ig,
1.30 schwarze 50: ROFF_it,
1.20 schwarze 51: ROFF_ne,
52: ROFF_nh,
1.14 schwarze 53: ROFF_nr,
1.31 schwarze 54: ROFF_ns,
55: ROFF_ps,
1.2 schwarze 56: ROFF_rm,
1.14 schwarze 57: ROFF_so,
1.31 schwarze 58: ROFF_ta,
1.2 schwarze 59: ROFF_tr,
1.27 schwarze 60: ROFF_TS,
61: ROFF_TE,
62: ROFF_T_,
1.32 ! schwarze 63: ROFF_EQ,
! 64: ROFF_EN,
1.2 schwarze 65: ROFF_cblock,
1.13 schwarze 66: ROFF_ccond, /* FIXME: remove this. */
1.16 schwarze 67: ROFF_USERDEF,
1.1 schwarze 68: ROFF_MAX
69: };
70:
1.2 schwarze 71: enum roffrule {
72: ROFFRULE_ALLOW,
73: ROFFRULE_DENY
74: };
75:
1.8 schwarze 76: struct roffstr {
77: char *name; /* key of symbol */
78: char *string; /* current value */
79: struct roffstr *next; /* next in list */
80: };
81:
1.1 schwarze 82: struct roff {
83: struct roffnode *last; /* leaf of stack */
84: mandocmsg msg; /* err/warn/fatal messages */
85: void *data; /* privdata for messages */
1.2 schwarze 86: enum roffrule rstack[RSTACK_MAX]; /* stack of !`ie' rules */
87: int rstackpos; /* position in rstack */
1.6 schwarze 88: struct regset *regs; /* read/writable registers */
1.16 schwarze 89: struct roffstr *first_string; /* user-defined strings & macros */
90: const char *current_string; /* value of last called user macro */
1.27 schwarze 91: struct tbl_node *first_tbl; /* first table parsed */
92: struct tbl_node *last_tbl; /* last table parsed */
93: struct tbl_node *tbl; /* current table being parsed */
1.32 ! schwarze 94: struct eqn_node *last_eqn; /* last equation parsed */
! 95: struct eqn_node *first_eqn; /* first equation parsed */
! 96: struct eqn_node *eqn; /* current equation being parsed */
1.1 schwarze 97: };
98:
99: struct roffnode {
100: enum rofft tok; /* type of node */
101: struct roffnode *parent; /* up one in stack */
102: int line; /* parse line */
103: int col; /* parse col */
1.16 schwarze 104: char *name; /* node name, e.g. macro name */
1.2 schwarze 105: char *end; /* end-rules: custom token */
106: int endspan; /* end-rules: next-line or infty */
107: enum roffrule rule; /* current evaluation rule */
1.1 schwarze 108: };
109:
110: #define ROFF_ARGS struct roff *r, /* parse ctx */ \
111: enum rofft tok, /* tok of macro */ \
112: char **bufp, /* input buffer */ \
113: size_t *szp, /* size of input buffer */ \
114: int ln, /* parse line */ \
1.2 schwarze 115: int ppos, /* original pos in buffer */ \
116: int pos, /* current pos in buffer */ \
117: int *offs /* reset offset of buffer data */
1.1 schwarze 118:
119: typedef enum rofferr (*roffproc)(ROFF_ARGS);
120:
121: struct roffmac {
122: const char *name; /* macro name */
1.2 schwarze 123: roffproc proc; /* process new macro */
124: roffproc text; /* process as child text of macro */
125: roffproc sub; /* process as child of macro */
126: int flags;
127: #define ROFFMAC_STRUCT (1 << 0) /* always interpret */
1.3 schwarze 128: struct roffmac *next;
1.1 schwarze 129: };
130:
1.2 schwarze 131: static enum rofferr roff_block(ROFF_ARGS);
132: static enum rofferr roff_block_text(ROFF_ARGS);
133: static enum rofferr roff_block_sub(ROFF_ARGS);
134: static enum rofferr roff_cblock(ROFF_ARGS);
135: static enum rofferr roff_ccond(ROFF_ARGS);
136: static enum rofferr roff_cond(ROFF_ARGS);
137: static enum rofferr roff_cond_text(ROFF_ARGS);
138: static enum rofferr roff_cond_sub(ROFF_ARGS);
1.7 schwarze 139: static enum rofferr roff_ds(ROFF_ARGS);
1.8 schwarze 140: static enum roffrule roff_evalcond(const char *, int *);
141: static void roff_freestr(struct roff *);
1.28 schwarze 142: static char *roff_getname(struct roff *, char **, int, int);
1.8 schwarze 143: static const char *roff_getstrn(const struct roff *,
144: const char *, size_t);
1.21 schwarze 145: static enum rofferr roff_line_ignore(ROFF_ARGS);
1.6 schwarze 146: static enum rofferr roff_nr(ROFF_ARGS);
1.9 schwarze 147: static int roff_res(struct roff *,
148: char **, size_t *, int);
1.29 schwarze 149: static enum rofferr roff_rm(ROFF_ARGS);
1.8 schwarze 150: static void roff_setstr(struct roff *,
1.16 schwarze 151: const char *, const char *, int);
1.14 schwarze 152: static enum rofferr roff_so(ROFF_ARGS);
1.27 schwarze 153: static enum rofferr roff_TE(ROFF_ARGS);
154: static enum rofferr roff_TS(ROFF_ARGS);
1.32 ! schwarze 155: static enum rofferr roff_EQ(ROFF_ARGS);
! 156: static enum rofferr roff_EN(ROFF_ARGS);
1.27 schwarze 157: static enum rofferr roff_T_(ROFF_ARGS);
1.16 schwarze 158: static enum rofferr roff_userdef(ROFF_ARGS);
1.1 schwarze 159:
1.3 schwarze 160: /* See roff_hash_find() */
161:
162: #define ASCII_HI 126
163: #define ASCII_LO 33
164: #define HASHWIDTH (ASCII_HI - ASCII_LO + 1)
165:
166: static struct roffmac *hash[HASHWIDTH];
167:
168: static struct roffmac roffs[ROFF_MAX] = {
1.21 schwarze 169: { "ad", roff_line_ignore, NULL, NULL, 0, NULL },
1.3 schwarze 170: { "am", roff_block, roff_block_text, roff_block_sub, 0, NULL },
171: { "ami", roff_block, roff_block_text, roff_block_sub, 0, NULL },
172: { "am1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
173: { "de", roff_block, roff_block_text, roff_block_sub, 0, NULL },
174: { "dei", roff_block, roff_block_text, roff_block_sub, 0, NULL },
175: { "de1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.7 schwarze 176: { "ds", roff_ds, NULL, NULL, 0, NULL },
1.3 schwarze 177: { "el", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
1.21 schwarze 178: { "hy", roff_line_ignore, NULL, NULL, 0, NULL },
1.3 schwarze 179: { "ie", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
180: { "if", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
181: { "ig", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.30 schwarze 182: { "it", roff_line_ignore, NULL, NULL, 0, NULL },
1.21 schwarze 183: { "ne", roff_line_ignore, NULL, NULL, 0, NULL },
184: { "nh", roff_line_ignore, NULL, NULL, 0, NULL },
1.14 schwarze 185: { "nr", roff_nr, NULL, NULL, 0, NULL },
1.31 schwarze 186: { "ns", roff_line_ignore, NULL, NULL, 0, NULL },
187: { "ps", roff_line_ignore, NULL, NULL, 0, NULL },
1.29 schwarze 188: { "rm", roff_rm, NULL, NULL, 0, NULL },
1.14 schwarze 189: { "so", roff_so, NULL, NULL, 0, NULL },
1.31 schwarze 190: { "ta", roff_line_ignore, NULL, NULL, 0, NULL },
1.21 schwarze 191: { "tr", roff_line_ignore, NULL, NULL, 0, NULL },
1.27 schwarze 192: { "TS", roff_TS, NULL, NULL, 0, NULL },
193: { "TE", roff_TE, NULL, NULL, 0, NULL },
194: { "T&", roff_T_, NULL, NULL, 0, NULL },
1.32 ! schwarze 195: { "EQ", roff_EQ, NULL, NULL, 0, NULL },
! 196: { "EN", roff_EN, NULL, NULL, 0, NULL },
1.3 schwarze 197: { ".", roff_cblock, NULL, NULL, 0, NULL },
198: { "\\}", roff_ccond, NULL, NULL, 0, NULL },
1.16 schwarze 199: { NULL, roff_userdef, NULL, NULL, 0, NULL },
1.1 schwarze 200: };
201:
202: static void roff_free1(struct roff *);
1.16 schwarze 203: static enum rofft roff_hash_find(const char *, size_t);
1.3 schwarze 204: static void roff_hash_init(void);
1.2 schwarze 205: static void roffnode_cleanscope(struct roff *);
1.16 schwarze 206: static void roffnode_push(struct roff *, enum rofft,
207: const char *, int, int);
1.1 schwarze 208: static void roffnode_pop(struct roff *);
1.16 schwarze 209: static enum rofft roff_parse(struct roff *, const char *, int *);
1.6 schwarze 210: static int roff_parse_nat(const char *, unsigned int *);
1.1 schwarze 211:
1.3 schwarze 212: /* See roff_hash_find() */
213: #define ROFF_HASH(p) (p[0] - ASCII_LO)
214:
215: static void
216: roff_hash_init(void)
217: {
218: struct roffmac *n;
219: int buc, i;
220:
1.16 schwarze 221: for (i = 0; i < (int)ROFF_USERDEF; i++) {
1.3 schwarze 222: assert(roffs[i].name[0] >= ASCII_LO);
223: assert(roffs[i].name[0] <= ASCII_HI);
224:
225: buc = ROFF_HASH(roffs[i].name);
226:
227: if (NULL != (n = hash[buc])) {
228: for ( ; n->next; n = n->next)
229: /* Do nothing. */ ;
230: n->next = &roffs[i];
231: } else
232: hash[buc] = &roffs[i];
233: }
234: }
235:
1.1 schwarze 236:
237: /*
238: * Look up a roff token by its name. Returns ROFF_MAX if no macro by
239: * the nil-terminated string name could be found.
240: */
241: static enum rofft
1.16 schwarze 242: roff_hash_find(const char *p, size_t s)
1.1 schwarze 243: {
1.3 schwarze 244: int buc;
245: struct roffmac *n;
1.1 schwarze 246:
1.3 schwarze 247: /*
248: * libroff has an extremely simple hashtable, for the time
249: * being, which simply keys on the first character, which must
250: * be printable, then walks a chain. It works well enough until
251: * optimised.
252: */
253:
254: if (p[0] < ASCII_LO || p[0] > ASCII_HI)
255: return(ROFF_MAX);
256:
257: buc = ROFF_HASH(p);
258:
259: if (NULL == (n = hash[buc]))
260: return(ROFF_MAX);
261: for ( ; n; n = n->next)
1.16 schwarze 262: if (0 == strncmp(n->name, p, s) && '\0' == n->name[(int)s])
1.3 schwarze 263: return((enum rofft)(n - roffs));
1.1 schwarze 264:
265: return(ROFF_MAX);
266: }
267:
268:
269: /*
270: * Pop the current node off of the stack of roff instructions currently
271: * pending.
272: */
273: static void
274: roffnode_pop(struct roff *r)
275: {
276: struct roffnode *p;
277:
1.2 schwarze 278: assert(r->last);
279: p = r->last;
280:
281: if (ROFF_el == p->tok)
282: if (r->rstackpos > -1)
283: r->rstackpos--;
284:
285: r->last = r->last->parent;
1.16 schwarze 286: free(p->name);
287: free(p->end);
1.1 schwarze 288: free(p);
289: }
290:
291:
292: /*
293: * Push a roff node onto the instruction stack. This must later be
294: * removed with roffnode_pop().
295: */
1.11 schwarze 296: static void
1.16 schwarze 297: roffnode_push(struct roff *r, enum rofft tok, const char *name,
298: int line, int col)
1.1 schwarze 299: {
300: struct roffnode *p;
301:
1.11 schwarze 302: p = mandoc_calloc(1, sizeof(struct roffnode));
1.1 schwarze 303: p->tok = tok;
1.16 schwarze 304: if (name)
305: p->name = mandoc_strdup(name);
1.1 schwarze 306: p->parent = r->last;
307: p->line = line;
308: p->col = col;
1.2 schwarze 309: p->rule = p->parent ? p->parent->rule : ROFFRULE_DENY;
1.1 schwarze 310:
311: r->last = p;
312: }
313:
314:
315: static void
316: roff_free1(struct roff *r)
317: {
1.27 schwarze 318: struct tbl_node *t;
1.32 ! schwarze 319: struct eqn_node *e;
1.27 schwarze 320:
1.32 ! schwarze 321: while (NULL != (t = r->first_tbl)) {
1.27 schwarze 322: r->first_tbl = t->next;
323: tbl_free(t);
324: }
325:
326: r->first_tbl = r->last_tbl = r->tbl = NULL;
1.1 schwarze 327:
1.32 ! schwarze 328: while (NULL != (e = r->first_eqn)) {
! 329: r->first_eqn = e->next;
! 330: eqn_free(e);
! 331: }
! 332:
! 333: r->first_eqn = r->last_eqn = r->eqn = NULL;
! 334:
1.1 schwarze 335: while (r->last)
336: roffnode_pop(r);
1.27 schwarze 337:
1.8 schwarze 338: roff_freestr(r);
1.1 schwarze 339: }
340:
341:
342: void
343: roff_reset(struct roff *r)
344: {
345:
346: roff_free1(r);
347: }
348:
349:
350: void
351: roff_free(struct roff *r)
352: {
353:
354: roff_free1(r);
355: free(r);
356: }
357:
358:
359: struct roff *
1.11 schwarze 360: roff_alloc(struct regset *regs, void *data, const mandocmsg msg)
1.1 schwarze 361: {
362: struct roff *r;
363:
1.11 schwarze 364: r = mandoc_calloc(1, sizeof(struct roff));
1.6 schwarze 365: r->regs = regs;
1.1 schwarze 366: r->msg = msg;
367: r->data = data;
1.2 schwarze 368: r->rstackpos = -1;
1.3 schwarze 369:
370: roff_hash_init();
1.1 schwarze 371: return(r);
372: }
373:
374:
1.8 schwarze 375: /*
376: * Pre-filter each and every line for reserved words (one beginning with
377: * `\*', e.g., `\*(ab'). These must be handled before the actual line
378: * is processed.
379: */
380: static int
1.9 schwarze 381: roff_res(struct roff *r, char **bufp, size_t *szp, int pos)
1.8 schwarze 382: {
1.23 schwarze 383: const char *stesc; /* start of an escape sequence ('\\') */
384: const char *stnam; /* start of the name, after "[(*" */
385: const char *cp; /* end of the name, e.g. before ']' */
386: const char *res; /* the string to be substituted */
1.8 schwarze 387: int i, maxl;
388: size_t nsz;
389: char *n;
390:
1.24 schwarze 391: /* Search for a leading backslash and save a pointer to it. */
1.23 schwarze 392:
1.24 schwarze 393: cp = *bufp + pos;
394: while (NULL != (cp = strchr(cp, '\\'))) {
395: stesc = cp++;
1.23 schwarze 396:
397: /*
398: * The second character must be an asterisk.
399: * If it isn't, skip it anyway: It is escaped,
400: * so it can't start another escape sequence.
401: */
402:
1.24 schwarze 403: if ('\0' == *cp)
404: return(1);
405: if ('*' != *cp++)
1.23 schwarze 406: continue;
407:
408: /*
409: * The third character decides the length
410: * of the name of the string.
411: * Save a pointer to the name.
412: */
413:
1.24 schwarze 414: switch (*cp) {
415: case ('\0'):
416: return(1);
1.8 schwarze 417: case ('('):
418: cp++;
419: maxl = 2;
420: break;
421: case ('['):
422: cp++;
423: maxl = 0;
424: break;
425: default:
426: maxl = 1;
427: break;
428: }
1.23 schwarze 429: stnam = cp;
1.8 schwarze 430:
1.23 schwarze 431: /* Advance to the end of the name. */
1.8 schwarze 432:
433: for (i = 0; 0 == maxl || i < maxl; i++, cp++) {
434: if ('\0' == *cp)
435: return(1); /* Error. */
436: if (0 == maxl && ']' == *cp)
437: break;
438: }
439:
1.23 schwarze 440: /*
441: * Retrieve the replacement string; if it is
442: * undefined, resume searching for escapes.
443: */
444:
445: res = roff_getstrn(r, stnam, (size_t)i);
1.8 schwarze 446:
447: if (NULL == res) {
448: cp -= maxl ? 1 : 0;
449: continue;
450: }
451:
1.23 schwarze 452: /* Replace the escape sequence by the string. */
453:
1.8 schwarze 454: nsz = *szp + strlen(res) + 1;
455: n = mandoc_malloc(nsz);
456:
1.23 schwarze 457: strlcpy(n, *bufp, (size_t)(stesc - *bufp + 1));
1.8 schwarze 458: strlcat(n, res, nsz);
459: strlcat(n, cp + (maxl ? 0 : 1), nsz);
460:
461: free(*bufp);
462:
463: *bufp = n;
464: *szp = nsz;
465: return(0);
466: }
467:
468: return(1);
469: }
470:
471:
1.1 schwarze 472: enum rofferr
1.6 schwarze 473: roff_parseln(struct roff *r, int ln, char **bufp,
474: size_t *szp, int pos, int *offs)
1.1 schwarze 475: {
476: enum rofft t;
1.27 schwarze 477: enum rofferr e;
1.1 schwarze 478: int ppos;
479:
1.2 schwarze 480: /*
1.8 schwarze 481: * Run the reserved-word filter only if we have some reserved
482: * words to fill in.
483: */
484:
1.9 schwarze 485: if (r->first_string && ! roff_res(r, bufp, szp, pos))
1.16 schwarze 486: return(ROFF_REPARSE);
1.8 schwarze 487:
488: /*
1.2 schwarze 489: * First, if a scope is open and we're not a macro, pass the
490: * text through the macro's filter. If a scope isn't open and
491: * we're not a macro, just let it through.
1.32 ! schwarze 492: * Finally, if there's an equation scope open, divert it into it
! 493: * no matter our state.
1.2 schwarze 494: */
495:
496: if (r->last && ! ROFF_CTL((*bufp)[pos])) {
497: t = r->last->tok;
498: assert(roffs[t].text);
1.27 schwarze 499: e = (*roffs[t].text)
500: (r, t, bufp, szp, ln, pos, pos, offs);
501: assert(ROFF_IGN == e || ROFF_CONT == e);
1.32 ! schwarze 502: if (ROFF_CONT != e)
! 503: return(e);
! 504: if (r->eqn)
! 505: return(eqn_read(&r->eqn, ln, *bufp, *offs));
! 506: if (r->tbl)
1.27 schwarze 507: return(tbl_read(r->tbl, ln, *bufp, *offs));
1.32 ! schwarze 508: return(ROFF_CONT);
1.27 schwarze 509: } else if ( ! ROFF_CTL((*bufp)[pos])) {
1.32 ! schwarze 510: if (r->eqn)
! 511: return(eqn_read(&r->eqn, ln, *bufp, *offs));
1.27 schwarze 512: if (r->tbl)
513: return(tbl_read(r->tbl, ln, *bufp, *offs));
1.2 schwarze 514: return(ROFF_CONT);
1.32 ! schwarze 515: } else if (r->eqn)
! 516: return(eqn_read(&r->eqn, ln, *bufp, *offs));
1.2 schwarze 517:
518: /*
519: * If a scope is open, go to the child handler for that macro,
520: * as it may want to preprocess before doing anything with it.
1.32 ! schwarze 521: * Don't do so if an equation is open.
1.2 schwarze 522: */
523:
524: if (r->last) {
1.1 schwarze 525: t = r->last->tok;
526: assert(roffs[t].sub);
1.2 schwarze 527: return((*roffs[t].sub)
1.8 schwarze 528: (r, t, bufp, szp,
529: ln, pos, pos, offs));
1.2 schwarze 530: }
531:
532: /*
533: * Lastly, as we've no scope open, try to look up and execute
534: * the new macro. If no macro is found, simply return and let
535: * the compilers handle it.
536: */
537:
538: ppos = pos;
1.16 schwarze 539: if (ROFF_MAX == (t = roff_parse(r, *bufp, &pos)))
1.1 schwarze 540: return(ROFF_CONT);
541:
1.2 schwarze 542: assert(roffs[t].proc);
543: return((*roffs[t].proc)
1.8 schwarze 544: (r, t, bufp, szp,
545: ln, ppos, pos, offs));
1.2 schwarze 546: }
547:
1.1 schwarze 548:
1.27 schwarze 549: void
1.2 schwarze 550: roff_endparse(struct roff *r)
551: {
1.1 schwarze 552:
1.27 schwarze 553: if (r->last)
554: (*r->msg)(MANDOCERR_SCOPEEXIT, r->data,
555: r->last->line, r->last->col, NULL);
556:
1.32 ! schwarze 557: if (r->eqn) {
! 558: (*r->msg)(MANDOCERR_SCOPEEXIT, r->data,
! 559: r->eqn->eqn.line, r->eqn->eqn.pos, NULL);
! 560: eqn_end(r->eqn);
! 561: r->eqn = NULL;
! 562: }
! 563:
1.27 schwarze 564: if (r->tbl) {
565: (*r->msg)(MANDOCERR_SCOPEEXIT, r->data,
566: r->tbl->line, r->tbl->pos, NULL);
567: tbl_end(r->tbl);
568: r->tbl = NULL;
569: }
1.1 schwarze 570: }
571:
572:
573: /*
574: * Parse a roff node's type from the input buffer. This must be in the
575: * form of ".foo xxx" in the usual way.
576: */
577: static enum rofft
1.16 schwarze 578: roff_parse(struct roff *r, const char *buf, int *pos)
1.1 schwarze 579: {
1.16 schwarze 580: const char *mac;
581: size_t maclen;
1.1 schwarze 582: enum rofft t;
583:
1.2 schwarze 584: assert(ROFF_CTL(buf[*pos]));
585: (*pos)++;
1.1 schwarze 586:
1.16 schwarze 587: while (' ' == buf[*pos] || '\t' == buf[*pos])
1.1 schwarze 588: (*pos)++;
589:
590: if ('\0' == buf[*pos])
591: return(ROFF_MAX);
592:
1.16 schwarze 593: mac = buf + *pos;
594: maclen = strcspn(mac, " \\\t\0");
1.1 schwarze 595:
1.16 schwarze 596: t = (r->current_string = roff_getstrn(r, mac, maclen))
597: ? ROFF_USERDEF : roff_hash_find(mac, maclen);
1.1 schwarze 598:
1.16 schwarze 599: *pos += maclen;
1.1 schwarze 600: while (buf[*pos] && ' ' == buf[*pos])
601: (*pos)++;
602:
603: return(t);
604: }
605:
606:
1.6 schwarze 607: static int
608: roff_parse_nat(const char *buf, unsigned int *res)
609: {
610: char *ep;
611: long lval;
612:
613: errno = 0;
614: lval = strtol(buf, &ep, 10);
615: if (buf[0] == '\0' || *ep != '\0')
616: return(0);
617: if ((errno == ERANGE &&
618: (lval == LONG_MAX || lval == LONG_MIN)) ||
619: (lval > INT_MAX || lval < 0))
620: return(0);
621:
622: *res = (unsigned int)lval;
623: return(1);
624: }
625:
626:
1.1 schwarze 627: /* ARGSUSED */
628: static enum rofferr
1.2 schwarze 629: roff_cblock(ROFF_ARGS)
1.1 schwarze 630: {
631:
1.2 schwarze 632: /*
633: * A block-close `..' should only be invoked as a child of an
634: * ignore macro, otherwise raise a warning and just ignore it.
635: */
636:
637: if (NULL == r->last) {
1.27 schwarze 638: (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL);
1.2 schwarze 639: return(ROFF_IGN);
640: }
1.1 schwarze 641:
1.2 schwarze 642: switch (r->last->tok) {
643: case (ROFF_am):
644: /* FALLTHROUGH */
645: case (ROFF_ami):
646: /* FALLTHROUGH */
647: case (ROFF_am1):
648: /* FALLTHROUGH */
649: case (ROFF_de):
1.23 schwarze 650: /* ROFF_de1 is remapped to ROFF_de in roff_block(). */
1.2 schwarze 651: /* FALLTHROUGH */
652: case (ROFF_dei):
653: /* FALLTHROUGH */
654: case (ROFF_ig):
655: break;
656: default:
1.27 schwarze 657: (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL);
1.1 schwarze 658: return(ROFF_IGN);
1.2 schwarze 659: }
660:
661: if ((*bufp)[pos])
1.27 schwarze 662: (*r->msg)(MANDOCERR_ARGSLOST, r->data, ln, pos, NULL);
1.2 schwarze 663:
664: roffnode_pop(r);
665: roffnode_cleanscope(r);
666: return(ROFF_IGN);
667:
668: }
1.1 schwarze 669:
670:
1.2 schwarze 671: static void
672: roffnode_cleanscope(struct roff *r)
673: {
1.1 schwarze 674:
1.2 schwarze 675: while (r->last) {
676: if (--r->last->endspan < 0)
677: break;
678: roffnode_pop(r);
679: }
680: }
1.1 schwarze 681:
682:
1.2 schwarze 683: /* ARGSUSED */
684: static enum rofferr
685: roff_ccond(ROFF_ARGS)
686: {
1.1 schwarze 687:
1.2 schwarze 688: if (NULL == r->last) {
1.27 schwarze 689: (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL);
1.1 schwarze 690: return(ROFF_IGN);
1.2 schwarze 691: }
1.1 schwarze 692:
1.2 schwarze 693: switch (r->last->tok) {
694: case (ROFF_el):
695: /* FALLTHROUGH */
696: case (ROFF_ie):
697: /* FALLTHROUGH */
698: case (ROFF_if):
699: break;
700: default:
1.27 schwarze 701: (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL);
1.2 schwarze 702: return(ROFF_IGN);
703: }
1.1 schwarze 704:
1.2 schwarze 705: if (r->last->endspan > -1) {
1.27 schwarze 706: (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL);
1.1 schwarze 707: return(ROFF_IGN);
1.2 schwarze 708: }
709:
710: if ((*bufp)[pos])
1.27 schwarze 711: (*r->msg)(MANDOCERR_ARGSLOST, r->data, ln, pos, NULL);
1.1 schwarze 712:
1.2 schwarze 713: roffnode_pop(r);
714: roffnode_cleanscope(r);
1.1 schwarze 715: return(ROFF_IGN);
716: }
717:
718:
719: /* ARGSUSED */
720: static enum rofferr
1.2 schwarze 721: roff_block(ROFF_ARGS)
1.1 schwarze 722: {
1.2 schwarze 723: int sv;
724: size_t sz;
1.16 schwarze 725: char *name;
726:
727: name = NULL;
1.2 schwarze 728:
1.16 schwarze 729: if (ROFF_ig != tok) {
730: if ('\0' == (*bufp)[pos]) {
731: (*r->msg)(MANDOCERR_NOARGS, r->data, ln, ppos, NULL);
732: return(ROFF_IGN);
733: }
1.22 schwarze 734:
735: /*
736: * Re-write `de1', since we don't really care about
737: * groff's strange compatibility mode, into `de'.
738: */
739:
1.18 schwarze 740: if (ROFF_de1 == tok)
741: tok = ROFF_de;
1.16 schwarze 742: if (ROFF_de == tok)
743: name = *bufp + pos;
1.21 schwarze 744: else
745: (*r->msg)(MANDOCERR_REQUEST, r->data, ln, ppos,
746: roffs[tok].name);
1.22 schwarze 747:
1.2 schwarze 748: while ((*bufp)[pos] && ' ' != (*bufp)[pos])
749: pos++;
1.22 schwarze 750:
1.2 schwarze 751: while (' ' == (*bufp)[pos])
1.16 schwarze 752: (*bufp)[pos++] = '\0';
1.2 schwarze 753: }
754:
1.16 schwarze 755: roffnode_push(r, tok, name, ln, ppos);
756:
757: /*
758: * At the beginning of a `de' macro, clear the existing string
759: * with the same name, if there is one. New content will be
760: * added from roff_block_text() in multiline mode.
761: */
1.22 schwarze 762:
1.16 schwarze 763: if (ROFF_de == tok)
1.19 schwarze 764: roff_setstr(r, name, "", 0);
1.2 schwarze 765:
766: if ('\0' == (*bufp)[pos])
767: return(ROFF_IGN);
1.1 schwarze 768:
1.22 schwarze 769: /* If present, process the custom end-of-line marker. */
770:
1.2 schwarze 771: sv = pos;
1.22 schwarze 772: while ((*bufp)[pos] &&
773: ' ' != (*bufp)[pos] &&
1.2 schwarze 774: '\t' != (*bufp)[pos])
775: pos++;
776:
777: /*
778: * Note: groff does NOT like escape characters in the input.
779: * Instead of detecting this, we're just going to let it fly and
780: * to hell with it.
781: */
782:
783: assert(pos > sv);
784: sz = (size_t)(pos - sv);
785:
786: if (1 == sz && '.' == (*bufp)[sv])
787: return(ROFF_IGN);
788:
1.11 schwarze 789: r->last->end = mandoc_malloc(sz + 1);
1.2 schwarze 790:
791: memcpy(r->last->end, *bufp + sv, sz);
792: r->last->end[(int)sz] = '\0';
793:
794: if ((*bufp)[pos])
1.22 schwarze 795: (*r->msg)(MANDOCERR_ARGSLOST, r->data, ln, pos, NULL);
1.1 schwarze 796:
797: return(ROFF_IGN);
798: }
799:
800:
801: /* ARGSUSED */
802: static enum rofferr
1.2 schwarze 803: roff_block_sub(ROFF_ARGS)
1.1 schwarze 804: {
1.2 schwarze 805: enum rofft t;
806: int i, j;
807:
808: /*
809: * First check whether a custom macro exists at this level. If
810: * it does, then check against it. This is some of groff's
811: * stranger behaviours. If we encountered a custom end-scope
812: * tag and that tag also happens to be a "real" macro, then we
813: * need to try interpreting it again as a real macro. If it's
814: * not, then return ignore. Else continue.
815: */
816:
817: if (r->last->end) {
818: i = pos + 1;
819: while (' ' == (*bufp)[i] || '\t' == (*bufp)[i])
820: i++;
821:
822: for (j = 0; r->last->end[j]; j++, i++)
823: if ((*bufp)[i] != r->last->end[j])
824: break;
1.1 schwarze 825:
1.2 schwarze 826: if ('\0' == r->last->end[j] &&
827: ('\0' == (*bufp)[i] ||
828: ' ' == (*bufp)[i] ||
829: '\t' == (*bufp)[i])) {
830: roffnode_pop(r);
831: roffnode_cleanscope(r);
1.1 schwarze 832:
1.16 schwarze 833: if (ROFF_MAX != roff_parse(r, *bufp, &pos))
1.2 schwarze 834: return(ROFF_RERUN);
835: return(ROFF_IGN);
836: }
1.1 schwarze 837: }
838:
1.2 schwarze 839: /*
840: * If we have no custom end-query or lookup failed, then try
841: * pulling it out of the hashtable.
842: */
1.1 schwarze 843:
1.2 schwarze 844: ppos = pos;
1.16 schwarze 845: t = roff_parse(r, *bufp, &pos);
1.1 schwarze 846:
1.16 schwarze 847: /*
848: * Macros other than block-end are only significant
849: * in `de' blocks; elsewhere, simply throw them away.
850: */
851: if (ROFF_cblock != t) {
852: if (ROFF_de == tok)
853: roff_setstr(r, r->last->name, *bufp + ppos, 1);
1.1 schwarze 854: return(ROFF_IGN);
1.16 schwarze 855: }
1.1 schwarze 856:
1.2 schwarze 857: assert(roffs[t].proc);
1.6 schwarze 858: return((*roffs[t].proc)(r, t, bufp, szp,
859: ln, ppos, pos, offs));
1.2 schwarze 860: }
861:
862:
863: /* ARGSUSED */
864: static enum rofferr
865: roff_block_text(ROFF_ARGS)
866: {
867:
1.16 schwarze 868: if (ROFF_de == tok)
869: roff_setstr(r, r->last->name, *bufp + pos, 1);
870:
1.2 schwarze 871: return(ROFF_IGN);
872: }
873:
874:
875: /* ARGSUSED */
876: static enum rofferr
877: roff_cond_sub(ROFF_ARGS)
878: {
879: enum rofft t;
880: enum roffrule rr;
881:
882: ppos = pos;
883: rr = r->last->rule;
884:
1.5 schwarze 885: /*
886: * Clean out scope. If we've closed ourselves, then don't
887: * continue.
888: */
889:
890: roffnode_cleanscope(r);
891:
1.16 schwarze 892: if (ROFF_MAX == (t = roff_parse(r, *bufp, &pos))) {
1.12 schwarze 893: if ('\\' == (*bufp)[pos] && '}' == (*bufp)[pos + 1])
894: return(roff_ccond
895: (r, ROFF_ccond, bufp, szp,
896: ln, pos, pos + 2, offs));
1.2 schwarze 897: return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
1.12 schwarze 898: }
1.2 schwarze 899:
900: /*
901: * A denied conditional must evaluate its children if and only
902: * if they're either structurally required (such as loops and
903: * conditionals) or a closing macro.
904: */
905: if (ROFFRULE_DENY == rr)
906: if ( ! (ROFFMAC_STRUCT & roffs[t].flags))
907: if (ROFF_ccond != t)
908: return(ROFF_IGN);
909:
910: assert(roffs[t].proc);
1.6 schwarze 911: return((*roffs[t].proc)(r, t, bufp, szp,
912: ln, ppos, pos, offs));
1.2 schwarze 913: }
914:
915:
916: /* ARGSUSED */
917: static enum rofferr
918: roff_cond_text(ROFF_ARGS)
919: {
920: char *ep, *st;
921: enum roffrule rr;
922:
923: rr = r->last->rule;
1.1 schwarze 924:
925: /*
1.2 schwarze 926: * We display the value of the text if out current evaluation
927: * scope permits us to do so.
1.1 schwarze 928: */
1.13 schwarze 929:
930: /* FIXME: use roff_ccond? */
1.1 schwarze 931:
1.2 schwarze 932: st = &(*bufp)[pos];
933: if (NULL == (ep = strstr(st, "\\}"))) {
934: roffnode_cleanscope(r);
935: return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
936: }
937:
1.4 schwarze 938: if (ep == st || (ep > st && '\\' != *(ep - 1)))
1.2 schwarze 939: roffnode_pop(r);
940:
941: roffnode_cleanscope(r);
942: return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
943: }
944:
945:
1.5 schwarze 946: static enum roffrule
947: roff_evalcond(const char *v, int *pos)
948: {
949:
950: switch (v[*pos]) {
951: case ('n'):
952: (*pos)++;
953: return(ROFFRULE_ALLOW);
954: case ('e'):
955: /* FALLTHROUGH */
956: case ('o'):
957: /* FALLTHROUGH */
958: case ('t'):
959: (*pos)++;
960: return(ROFFRULE_DENY);
961: default:
962: break;
963: }
964:
965: while (v[*pos] && ' ' != v[*pos])
966: (*pos)++;
967: return(ROFFRULE_DENY);
968: }
969:
1.2 schwarze 970: /* ARGSUSED */
971: static enum rofferr
1.21 schwarze 972: roff_line_ignore(ROFF_ARGS)
1.6 schwarze 973: {
1.30 schwarze 974:
975: if (ROFF_it == tok)
976: (*r->msg)(MANDOCERR_REQUEST, r->data, ln, ppos, "it");
1.6 schwarze 977:
1.21 schwarze 978: return(ROFF_IGN);
979: }
980:
981: /* ARGSUSED */
982: static enum rofferr
1.2 schwarze 983: roff_cond(ROFF_ARGS)
984: {
985: int sv;
1.5 schwarze 986: enum roffrule rule;
1.2 schwarze 987:
988: /* Stack overflow! */
989:
990: if (ROFF_ie == tok && r->rstackpos == RSTACK_MAX - 1) {
1.1 schwarze 991: (*r->msg)(MANDOCERR_MEM, r->data, ln, ppos, NULL);
992: return(ROFF_ERR);
993: }
994:
1.5 schwarze 995: /* First, evaluate the conditional. */
1.2 schwarze 996:
1.5 schwarze 997: if (ROFF_el == tok) {
998: /*
999: * An `.el' will get the value of the current rstack
1000: * entry set in prior `ie' calls or defaults to DENY.
1001: */
1002: if (r->rstackpos < 0)
1003: rule = ROFFRULE_DENY;
1004: else
1005: rule = r->rstack[r->rstackpos];
1006: } else
1007: rule = roff_evalcond(*bufp, &pos);
1.2 schwarze 1008:
1009: sv = pos;
1.5 schwarze 1010:
1.2 schwarze 1011: while (' ' == (*bufp)[pos])
1012: pos++;
1013:
1014: /*
1015: * Roff is weird. If we have just white-space after the
1016: * conditional, it's considered the BODY and we exit without
1017: * really doing anything. Warn about this. It's probably
1018: * wrong.
1019: */
1.5 schwarze 1020:
1.2 schwarze 1021: if ('\0' == (*bufp)[pos] && sv != pos) {
1.22 schwarze 1022: (*r->msg)(MANDOCERR_NOARGS, r->data, ln, ppos, NULL);
1023: return(ROFF_IGN);
1.2 schwarze 1024: }
1025:
1.16 schwarze 1026: roffnode_push(r, tok, NULL, ln, ppos);
1.2 schwarze 1027:
1.5 schwarze 1028: r->last->rule = rule;
1.2 schwarze 1029:
1030: if (ROFF_ie == tok) {
1031: /*
1032: * An if-else will put the NEGATION of the current
1033: * evaluated conditional into the stack.
1034: */
1035: r->rstackpos++;
1036: if (ROFFRULE_DENY == r->last->rule)
1037: r->rstack[r->rstackpos] = ROFFRULE_ALLOW;
1038: else
1039: r->rstack[r->rstackpos] = ROFFRULE_DENY;
1040: }
1.5 schwarze 1041:
1042: /* If the parent has false as its rule, then so do we. */
1043:
1.2 schwarze 1044: if (r->last->parent && ROFFRULE_DENY == r->last->parent->rule)
1045: r->last->rule = ROFFRULE_DENY;
1.5 schwarze 1046:
1047: /*
1048: * Determine scope. If we're invoked with "\{" trailing the
1049: * conditional, then we're in a multiline scope. Else our scope
1050: * expires on the next line.
1051: */
1.2 schwarze 1052:
1053: r->last->endspan = 1;
1054:
1055: if ('\\' == (*bufp)[pos] && '{' == (*bufp)[pos + 1]) {
1056: r->last->endspan = -1;
1057: pos += 2;
1058: }
1059:
1060: /*
1061: * If there are no arguments on the line, the next-line scope is
1062: * assumed.
1063: */
1064:
1065: if ('\0' == (*bufp)[pos])
1066: return(ROFF_IGN);
1067:
1068: /* Otherwise re-run the roff parser after recalculating. */
1.1 schwarze 1069:
1.2 schwarze 1070: *offs = pos;
1071: return(ROFF_RERUN);
1.1 schwarze 1072: }
1073:
1074:
1.2 schwarze 1075: /* ARGSUSED */
1076: static enum rofferr
1.7 schwarze 1077: roff_ds(ROFF_ARGS)
1078: {
1.10 schwarze 1079: char *name, *string;
1080:
1081: /*
1082: * A symbol is named by the first word following the macro
1083: * invocation up to a space. Its value is anything after the
1084: * name's trailing whitespace and optional double-quote. Thus,
1085: *
1086: * [.ds foo "bar " ]
1087: *
1088: * will have `bar " ' as its value.
1089: */
1.7 schwarze 1090:
1.28 schwarze 1091: string = *bufp + pos;
1092: name = roff_getname(r, &string, ln, pos);
1.7 schwarze 1093: if ('\0' == *name)
1094: return(ROFF_IGN);
1095:
1.28 schwarze 1096: /* Read past initial double-quote. */
1097: if ('"' == *string)
1.7 schwarze 1098: string++;
1099:
1.10 schwarze 1100: /* The rest is the value. */
1.16 schwarze 1101: roff_setstr(r, name, string, 0);
1.7 schwarze 1102: return(ROFF_IGN);
1103: }
1104:
1105:
1106: /* ARGSUSED */
1107: static enum rofferr
1.6 schwarze 1108: roff_nr(ROFF_ARGS)
1.1 schwarze 1109: {
1.28 schwarze 1110: const char *key;
1111: char *val;
1.6 schwarze 1112: struct reg *rg;
1113:
1.28 schwarze 1114: val = *bufp + pos;
1115: key = roff_getname(r, &val, ln, pos);
1.6 schwarze 1116: rg = r->regs->regs;
1117:
1118: if (0 == strcmp(key, "nS")) {
1119: rg[(int)REG_nS].set = 1;
1120: if ( ! roff_parse_nat(val, &rg[(int)REG_nS].v.u))
1121: rg[(int)REG_nS].v.u = 0;
1122: }
1.1 schwarze 1123:
1.29 schwarze 1124: return(ROFF_IGN);
1125: }
1126:
1127: /* ARGSUSED */
1128: static enum rofferr
1129: roff_rm(ROFF_ARGS)
1130: {
1131: const char *name;
1132: char *cp;
1133:
1134: cp = *bufp + pos;
1135: while ('\0' != *cp) {
1136: name = roff_getname(r, &cp, ln, cp - *bufp);
1137: if ('\0' != *name)
1138: roff_setstr(r, name, NULL, 0);
1139: }
1.2 schwarze 1140: return(ROFF_IGN);
1.14 schwarze 1141: }
1142:
1143: /* ARGSUSED */
1144: static enum rofferr
1.27 schwarze 1145: roff_TE(ROFF_ARGS)
1146: {
1147:
1148: if (NULL == r->tbl)
1149: (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL);
1150: else
1151: tbl_end(r->tbl);
1152:
1153: r->tbl = NULL;
1154: return(ROFF_IGN);
1155: }
1156:
1157: /* ARGSUSED */
1158: static enum rofferr
1159: roff_T_(ROFF_ARGS)
1160: {
1161:
1162: if (NULL == r->tbl)
1163: (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL);
1164: else
1165: tbl_restart(ppos, ln, r->tbl);
1166:
1167: return(ROFF_IGN);
1168: }
1169:
1170: /* ARGSUSED */
1171: static enum rofferr
1.32 ! schwarze 1172: roff_EQ(ROFF_ARGS)
! 1173: {
! 1174: struct eqn_node *e;
! 1175:
! 1176: assert(NULL == r->eqn);
! 1177: e = eqn_alloc(ppos, ln);
! 1178:
! 1179: if (r->last_eqn)
! 1180: r->last_eqn->next = e;
! 1181: else
! 1182: r->first_eqn = r->last_eqn = e;
! 1183:
! 1184: r->eqn = r->last_eqn = e;
! 1185: return(ROFF_IGN);
! 1186: }
! 1187:
! 1188: /* ARGSUSED */
! 1189: static enum rofferr
! 1190: roff_EN(ROFF_ARGS)
! 1191: {
! 1192:
! 1193: (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL);
! 1194: return(ROFF_IGN);
! 1195: }
! 1196:
! 1197: /* ARGSUSED */
! 1198: static enum rofferr
1.27 schwarze 1199: roff_TS(ROFF_ARGS)
1200: {
1201: struct tbl_node *t;
1202:
1203: if (r->tbl) {
1204: (*r->msg)(MANDOCERR_SCOPEBROKEN, r->data, ln, ppos, NULL);
1205: tbl_end(r->tbl);
1206: }
1207:
1208: t = tbl_alloc(ppos, ln, r->data, r->msg);
1209:
1210: if (r->last_tbl)
1211: r->last_tbl->next = t;
1212: else
1213: r->first_tbl = r->last_tbl = t;
1214:
1215: r->tbl = r->last_tbl = t;
1216: return(ROFF_IGN);
1217: }
1218:
1219: /* ARGSUSED */
1220: static enum rofferr
1.14 schwarze 1221: roff_so(ROFF_ARGS)
1222: {
1223: char *name;
1.15 schwarze 1224:
1225: (*r->msg)(MANDOCERR_SO, r->data, ln, ppos, NULL);
1.14 schwarze 1226:
1.22 schwarze 1227: /*
1228: * Handle `so'. Be EXTREMELY careful, as we shouldn't be
1229: * opening anything that's not in our cwd or anything beneath
1230: * it. Thus, explicitly disallow traversing up the file-system
1231: * or using absolute paths.
1232: */
1233:
1.14 schwarze 1234: name = *bufp + pos;
1235: if ('/' == *name || strstr(name, "../") || strstr(name, "/..")) {
1236: (*r->msg)(MANDOCERR_SOPATH, r->data, ln, pos, NULL);
1237: return(ROFF_ERR);
1238: }
1239:
1240: *offs = pos;
1241: return(ROFF_SO);
1.7 schwarze 1242: }
1243:
1.16 schwarze 1244: /* ARGSUSED */
1245: static enum rofferr
1246: roff_userdef(ROFF_ARGS)
1.12 schwarze 1247: {
1.16 schwarze 1248: const char *arg[9];
1249: char *cp, *n1, *n2;
1.25 schwarze 1250: int i;
1.12 schwarze 1251:
1.16 schwarze 1252: /*
1253: * Collect pointers to macro argument strings
1254: * and null-terminate them.
1255: */
1256: cp = *bufp + pos;
1.25 schwarze 1257: for (i = 0; i < 9; i++)
1.26 schwarze 1258: arg[i] = '\0' == *cp ? "" :
1.25 schwarze 1259: mandoc_getarg(&cp, r->msg, r->data, ln, &pos);
1.16 schwarze 1260:
1261: /*
1262: * Expand macro arguments.
1.12 schwarze 1263: */
1.16 schwarze 1264: *szp = 0;
1265: n1 = cp = mandoc_strdup(r->current_string);
1266: while (NULL != (cp = strstr(cp, "\\$"))) {
1267: i = cp[2] - '1';
1268: if (0 > i || 8 < i) {
1269: /* Not an argument invocation. */
1270: cp += 2;
1271: continue;
1272: }
1273:
1274: *szp = strlen(n1) - 3 + strlen(arg[i]) + 1;
1275: n2 = mandoc_malloc(*szp);
1276:
1277: strlcpy(n2, n1, (size_t)(cp - n1 + 1));
1278: strlcat(n2, arg[i], *szp);
1279: strlcat(n2, cp + 3, *szp);
1280:
1281: cp = n2 + (cp - n1);
1282: free(n1);
1283: n1 = n2;
1.12 schwarze 1284: }
1285:
1.16 schwarze 1286: /*
1287: * Replace the macro invocation
1288: * by the expanded macro.
1289: */
1290: free(*bufp);
1291: *bufp = n1;
1292: if (0 == *szp)
1293: *szp = strlen(*bufp) + 1;
1294:
1.19 schwarze 1295: return(*szp > 1 && '\n' == (*bufp)[(int)*szp - 2] ?
1.16 schwarze 1296: ROFF_REPARSE : ROFF_APPEND);
1.12 schwarze 1297: }
1.28 schwarze 1298:
1299: static char *
1300: roff_getname(struct roff *r, char **cpp, int ln, int pos)
1301: {
1302: char *name, *cp;
1303:
1304: name = *cpp;
1305: if ('\0' == *name)
1306: return(name);
1307:
1308: /* Read until end of name. */
1309: for (cp = name; '\0' != *cp && ' ' != *cp; cp++) {
1310: if ('\\' != *cp)
1311: continue;
1312: cp++;
1313: if ('\\' == *cp)
1314: continue;
1315: (*r->msg)(MANDOCERR_NAMESC, r->data, ln, pos, NULL);
1316: *cp = '\0';
1317: name = cp;
1318: }
1319:
1320: /* Nil-terminate name. */
1321: if ('\0' != *cp)
1322: *(cp++) = '\0';
1323:
1324: /* Read past spaces. */
1325: while (' ' == *cp)
1326: cp++;
1327:
1328: *cpp = cp;
1329: return(name);
1330: }
1331:
1.16 schwarze 1332: /*
1333: * Store *string into the user-defined string called *name.
1334: * In multiline mode, append to an existing entry and append '\n';
1335: * else replace the existing entry, if there is one.
1336: * To clear an existing entry, call with (*r, *name, NULL, 0).
1337: */
1.8 schwarze 1338: static void
1.16 schwarze 1339: roff_setstr(struct roff *r, const char *name, const char *string,
1340: int multiline)
1.7 schwarze 1341: {
1342: struct roffstr *n;
1.16 schwarze 1343: char *c;
1344: size_t oldch, newch;
1.7 schwarze 1345:
1.16 schwarze 1346: /* Search for an existing string with the same name. */
1.8 schwarze 1347: n = r->first_string;
1.7 schwarze 1348: while (n && strcmp(name, n->name))
1349: n = n->next;
1.8 schwarze 1350:
1351: if (NULL == n) {
1.16 schwarze 1352: /* Create a new string table entry. */
1.8 schwarze 1353: n = mandoc_malloc(sizeof(struct roffstr));
1.16 schwarze 1354: n->name = mandoc_strdup(name);
1355: n->string = NULL;
1.8 schwarze 1356: n->next = r->first_string;
1357: r->first_string = n;
1.16 schwarze 1358: } else if (0 == multiline) {
1359: /* In multiline mode, append; else replace. */
1.7 schwarze 1360: free(n->string);
1.16 schwarze 1361: n->string = NULL;
1362: }
1363:
1364: if (NULL == string)
1365: return;
1366:
1367: /*
1368: * One additional byte for the '\n' in multiline mode,
1369: * and one for the terminating '\0'.
1370: */
1371: newch = strlen(string) + (multiline ? 2 : 1);
1372: if (NULL == n->string) {
1373: n->string = mandoc_malloc(newch);
1374: *n->string = '\0';
1375: oldch = 0;
1376: } else {
1377: oldch = strlen(n->string);
1378: n->string = mandoc_realloc(n->string, oldch + newch);
1379: }
1380:
1381: /* Skip existing content in the destination buffer. */
1382: c = n->string + oldch;
1383:
1384: /* Append new content to the destination buffer. */
1385: while (*string) {
1386: /*
1387: * Rudimentary roff copy mode:
1388: * Handle escaped backslashes.
1389: */
1390: if ('\\' == *string && '\\' == *(string + 1))
1391: string++;
1392: *c++ = *string++;
1393: }
1.8 schwarze 1394:
1.16 schwarze 1395: /* Append terminating bytes. */
1396: if (multiline)
1397: *c++ = '\n';
1398: *c = '\0';
1.7 schwarze 1399: }
1400:
1.8 schwarze 1401: static const char *
1402: roff_getstrn(const struct roff *r, const char *name, size_t len)
1.7 schwarze 1403: {
1.8 schwarze 1404: const struct roffstr *n;
1.7 schwarze 1405:
1.8 schwarze 1406: n = r->first_string;
1.10 schwarze 1407: while (n && (strncmp(name, n->name, len) || '\0' != n->name[(int)len]))
1.7 schwarze 1408: n = n->next;
1.8 schwarze 1409:
1410: return(n ? n->string : NULL);
1.7 schwarze 1411: }
1412:
1.8 schwarze 1413: static void
1414: roff_freestr(struct roff *r)
1.7 schwarze 1415: {
1416: struct roffstr *n, *nn;
1417:
1.8 schwarze 1418: for (n = r->first_string; n; n = nn) {
1.7 schwarze 1419: free(n->name);
1420: free(n->string);
1421: nn = n->next;
1422: free(n);
1423: }
1.8 schwarze 1424:
1425: r->first_string = NULL;
1.27 schwarze 1426: }
1427:
1428: const struct tbl_span *
1429: roff_span(const struct roff *r)
1430: {
1431:
1432: return(r->tbl ? tbl_span(r->tbl) : NULL);
1.32 ! schwarze 1433: }
! 1434:
! 1435: const struct eqn *
! 1436: roff_eqn(const struct roff *r)
! 1437: {
! 1438:
! 1439: return(r->last_eqn ? &r->last_eqn->eqn : NULL);
1.1 schwarze 1440: }
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