Annotation of mandoc/roff.c, Revision 1.184
1.184 ! schwarze 1: /* $Id: roff.c,v 1.183 2013/10/05 22:21:20 schwarze Exp $ */
1.1 kristaps 2: /*
1.175 schwarze 3: * Copyright (c) 2010, 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
1.177 schwarze 4: * Copyright (c) 2010, 2011, 2012, 2013 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: #ifdef HAVE_CONFIG_H
19: #include "config.h"
20: #endif
1.30 kristaps 21:
1.67 kristaps 22: #include <assert.h>
1.85 kristaps 23: #include <ctype.h>
1.178 schwarze 24: #include <stdio.h>
1.1 kristaps 25: #include <stdlib.h>
1.67 kristaps 26: #include <string.h>
1.1 kristaps 27:
1.67 kristaps 28: #include "mandoc.h"
1.109 kristaps 29: #include "libroff.h"
1.94 kristaps 30: #include "libmandoc.h"
1.33 kristaps 31:
1.141 kristaps 32: /* Maximum number of nested if-else conditionals. */
1.82 kristaps 33: #define RSTACK_MAX 128
34:
1.170 schwarze 35: /* Maximum number of string expansions per line, to break infinite loops. */
36: #define EXPAND_LIMIT 1000
37:
1.67 kristaps 38: enum rofft {
1.103 kristaps 39: ROFF_ad,
1.80 kristaps 40: ROFF_am,
41: ROFF_ami,
42: ROFF_am1,
1.174 kristaps 43: ROFF_cc,
1.80 kristaps 44: ROFF_de,
45: ROFF_dei,
46: ROFF_de1,
1.83 schwarze 47: ROFF_ds,
1.82 kristaps 48: ROFF_el,
1.103 kristaps 49: ROFF_hy,
1.82 kristaps 50: ROFF_ie,
1.75 kristaps 51: ROFF_if,
1.76 kristaps 52: ROFF_ig,
1.123 schwarze 53: ROFF_it,
1.103 kristaps 54: ROFF_ne,
55: ROFF_nh,
1.104 kristaps 56: ROFF_nr,
1.124 schwarze 57: ROFF_ns,
58: ROFF_ps,
1.83 schwarze 59: ROFF_rm,
1.105 kristaps 60: ROFF_so,
1.124 schwarze 61: ROFF_ta,
1.83 schwarze 62: ROFF_tr,
1.175 schwarze 63: ROFF_Dd,
64: ROFF_TH,
1.109 kristaps 65: ROFF_TS,
66: ROFF_TE,
1.112 kristaps 67: ROFF_T_,
1.125 kristaps 68: ROFF_EQ,
69: ROFF_EN,
1.76 kristaps 70: ROFF_cblock,
1.141 kristaps 71: ROFF_ccond,
1.106 kristaps 72: ROFF_USERDEF,
1.67 kristaps 73: ROFF_MAX
74: };
75:
1.82 kristaps 76: enum roffrule {
1.183 schwarze 77: ROFFRULE_DENY,
78: ROFFRULE_ALLOW
1.82 kristaps 79: };
80:
1.147 kristaps 81: /*
1.167 kristaps 82: * An incredibly-simple string buffer.
83: */
1.94 kristaps 84: struct roffstr {
1.167 kristaps 85: char *p; /* nil-terminated buffer */
86: size_t sz; /* saved strlen(p) */
1.166 kristaps 87: };
88:
89: /*
1.167 kristaps 90: * A key-value roffstr pair as part of a singly-linked list.
1.166 kristaps 91: */
92: struct roffkv {
93: struct roffstr key;
94: struct roffstr val;
95: struct roffkv *next; /* next in list */
1.94 kristaps 96: };
97:
1.180 schwarze 98: /*
99: * A single number register as part of a singly-linked list.
100: */
101: struct roffreg {
102: struct roffstr key;
1.181 schwarze 103: int val;
1.180 schwarze 104: struct roffreg *next;
105: };
106:
1.67 kristaps 107: struct roff {
1.175 schwarze 108: enum mparset parsetype; /* requested parse type */
1.128 kristaps 109: struct mparse *parse; /* parse point */
1.67 kristaps 110: struct roffnode *last; /* leaf of stack */
1.82 kristaps 111: enum roffrule rstack[RSTACK_MAX]; /* stack of !`ie' rules */
1.174 kristaps 112: char control; /* control character */
1.82 kristaps 113: int rstackpos; /* position in rstack */
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 */
1.79 kristaps 125: };
126:
1.67 kristaps 127: struct roffnode {
128: enum rofft tok; /* type of node */
129: struct roffnode *parent; /* up one in stack */
130: int line; /* parse line */
131: int col; /* parse col */
1.106 kristaps 132: char *name; /* node name, e.g. macro name */
1.79 kristaps 133: char *end; /* end-rules: custom token */
134: int endspan; /* end-rules: next-line or infty */
1.82 kristaps 135: enum roffrule rule; /* current evaluation rule */
1.67 kristaps 136: };
137:
138: #define ROFF_ARGS struct roff *r, /* parse ctx */ \
1.72 kristaps 139: enum rofft tok, /* tok of macro */ \
1.67 kristaps 140: char **bufp, /* input buffer */ \
141: size_t *szp, /* size of input buffer */ \
142: int ln, /* parse line */ \
1.75 kristaps 143: int ppos, /* original pos in buffer */ \
144: int pos, /* current pos in buffer */ \
1.74 kristaps 145: int *offs /* reset offset of buffer data */
1.67 kristaps 146:
147: typedef enum rofferr (*roffproc)(ROFF_ARGS);
148:
149: struct roffmac {
150: const char *name; /* macro name */
1.79 kristaps 151: roffproc proc; /* process new macro */
152: roffproc text; /* process as child text of macro */
153: roffproc sub; /* process as child of macro */
154: int flags;
155: #define ROFFMAC_STRUCT (1 << 0) /* always interpret */
1.85 kristaps 156: struct roffmac *next;
1.67 kristaps 157: };
158:
1.141 kristaps 159: struct predef {
160: const char *name; /* predefined input name */
161: const char *str; /* replacement symbol */
162: };
163:
164: #define PREDEF(__name, __str) \
165: { (__name), (__str) },
166:
1.155 kristaps 167: static enum rofft roffhash_find(const char *, size_t);
168: static void roffhash_init(void);
169: static void roffnode_cleanscope(struct roff *);
170: static void roffnode_pop(struct roff *);
171: static void roffnode_push(struct roff *, enum rofft,
172: const char *, int, int);
1.80 kristaps 173: static enum rofferr roff_block(ROFF_ARGS);
174: static enum rofferr roff_block_text(ROFF_ARGS);
175: static enum rofferr roff_block_sub(ROFF_ARGS);
176: static enum rofferr roff_cblock(ROFF_ARGS);
1.174 kristaps 177: static enum rofferr roff_cc(ROFF_ARGS);
1.80 kristaps 178: static enum rofferr roff_ccond(ROFF_ARGS);
1.82 kristaps 179: static enum rofferr roff_cond(ROFF_ARGS);
180: static enum rofferr roff_cond_text(ROFF_ARGS);
181: static enum rofferr roff_cond_sub(ROFF_ARGS);
1.92 schwarze 182: static enum rofferr roff_ds(ROFF_ARGS);
1.94 kristaps 183: static enum roffrule roff_evalcond(const char *, int *);
1.155 kristaps 184: static void roff_free1(struct roff *);
1.180 schwarze 185: static void roff_freereg(struct roffreg *);
1.167 kristaps 186: static void roff_freestr(struct roffkv *);
1.121 schwarze 187: static char *roff_getname(struct roff *, char **, int, int);
1.184 ! schwarze 188: static int roff_getnum(const char *, int *, int *);
! 189: static int roff_getop(const char *, int *, char *);
1.181 schwarze 190: static int roff_getregn(const struct roff *,
191: const char *, size_t);
1.94 kristaps 192: static const char *roff_getstrn(const struct roff *,
193: const char *, size_t);
1.178 schwarze 194: static enum rofferr roff_it(ROFF_ARGS);
1.103 kristaps 195: static enum rofferr roff_line_ignore(ROFF_ARGS);
1.89 kristaps 196: static enum rofferr roff_nr(ROFF_ARGS);
1.169 schwarze 197: static void roff_openeqn(struct roff *, const char *,
1.156 kristaps 198: int, int, const char *);
1.155 kristaps 199: static enum rofft roff_parse(struct roff *, const char *, int *);
1.178 schwarze 200: static enum rofferr roff_parsetext(char **, size_t *, int, int *);
1.172 schwarze 201: static enum rofferr roff_res(struct roff *,
1.142 kristaps 202: char **, size_t *, int, int);
1.122 schwarze 203: static enum rofferr roff_rm(ROFF_ARGS);
1.94 kristaps 204: static void roff_setstr(struct roff *,
1.106 kristaps 205: const char *, const char *, int);
1.166 kristaps 206: static void roff_setstrn(struct roffkv **, const char *,
1.164 kristaps 207: size_t, const char *, size_t, int);
1.105 kristaps 208: static enum rofferr roff_so(ROFF_ARGS);
1.164 kristaps 209: static enum rofferr roff_tr(ROFF_ARGS);
1.175 schwarze 210: static enum rofferr roff_Dd(ROFF_ARGS);
211: static enum rofferr roff_TH(ROFF_ARGS);
1.109 kristaps 212: static enum rofferr roff_TE(ROFF_ARGS);
213: static enum rofferr roff_TS(ROFF_ARGS);
1.125 kristaps 214: static enum rofferr roff_EQ(ROFF_ARGS);
215: static enum rofferr roff_EN(ROFF_ARGS);
1.112 kristaps 216: static enum rofferr roff_T_(ROFF_ARGS);
1.106 kristaps 217: static enum rofferr roff_userdef(ROFF_ARGS);
1.67 kristaps 218:
1.155 kristaps 219: /* See roffhash_find() */
1.85 kristaps 220:
221: #define ASCII_HI 126
222: #define ASCII_LO 33
223: #define HASHWIDTH (ASCII_HI - ASCII_LO + 1)
224:
225: static struct roffmac *hash[HASHWIDTH];
226:
227: static struct roffmac roffs[ROFF_MAX] = {
1.103 kristaps 228: { "ad", roff_line_ignore, NULL, NULL, 0, NULL },
1.85 kristaps 229: { "am", roff_block, roff_block_text, roff_block_sub, 0, NULL },
230: { "ami", roff_block, roff_block_text, roff_block_sub, 0, NULL },
231: { "am1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.174 kristaps 232: { "cc", roff_cc, NULL, NULL, 0, NULL },
1.85 kristaps 233: { "de", roff_block, roff_block_text, roff_block_sub, 0, NULL },
234: { "dei", roff_block, roff_block_text, roff_block_sub, 0, NULL },
235: { "de1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.92 schwarze 236: { "ds", roff_ds, NULL, NULL, 0, NULL },
1.85 kristaps 237: { "el", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
1.103 kristaps 238: { "hy", roff_line_ignore, NULL, NULL, 0, NULL },
1.85 kristaps 239: { "ie", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
240: { "if", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
241: { "ig", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.178 schwarze 242: { "it", roff_it, NULL, NULL, 0, NULL },
1.103 kristaps 243: { "ne", roff_line_ignore, NULL, NULL, 0, NULL },
244: { "nh", roff_line_ignore, NULL, NULL, 0, NULL },
1.104 kristaps 245: { "nr", roff_nr, NULL, NULL, 0, NULL },
1.124 schwarze 246: { "ns", roff_line_ignore, NULL, NULL, 0, NULL },
247: { "ps", roff_line_ignore, NULL, NULL, 0, NULL },
1.122 schwarze 248: { "rm", roff_rm, NULL, NULL, 0, NULL },
1.105 kristaps 249: { "so", roff_so, NULL, NULL, 0, NULL },
1.124 schwarze 250: { "ta", roff_line_ignore, NULL, NULL, 0, NULL },
1.164 kristaps 251: { "tr", roff_tr, NULL, NULL, 0, NULL },
1.175 schwarze 252: { "Dd", roff_Dd, NULL, NULL, 0, NULL },
253: { "TH", roff_TH, NULL, NULL, 0, NULL },
1.109 kristaps 254: { "TS", roff_TS, NULL, NULL, 0, NULL },
255: { "TE", roff_TE, NULL, NULL, 0, NULL },
1.112 kristaps 256: { "T&", roff_T_, NULL, NULL, 0, NULL },
1.125 kristaps 257: { "EQ", roff_EQ, NULL, NULL, 0, NULL },
258: { "EN", roff_EN, NULL, NULL, 0, NULL },
1.85 kristaps 259: { ".", roff_cblock, NULL, NULL, 0, NULL },
260: { "\\}", roff_ccond, NULL, NULL, 0, NULL },
1.106 kristaps 261: { NULL, roff_userdef, NULL, NULL, 0, NULL },
1.67 kristaps 262: };
263:
1.175 schwarze 264: const char *const __mdoc_reserved[] = {
265: "Ac", "Ad", "An", "Ao", "Ap", "Aq", "Ar", "At",
266: "Bc", "Bd", "Bf", "Bk", "Bl", "Bo", "Bq",
267: "Brc", "Bro", "Brq", "Bsx", "Bt", "Bx",
268: "Cd", "Cm", "Db", "Dc", "Dd", "Dl", "Do", "Dq",
269: "Ds", "Dt", "Dv", "Dx", "D1",
270: "Ec", "Ed", "Ef", "Ek", "El", "Em", "em",
271: "En", "Eo", "Eq", "Er", "Es", "Ev", "Ex",
272: "Fa", "Fc", "Fd", "Fl", "Fn", "Fo", "Fr", "Ft", "Fx",
273: "Hf", "Ic", "In", "It", "Lb", "Li", "Lk", "Lp", "LP",
274: "Me", "Ms", "Mt", "Nd", "Nm", "No", "Ns", "Nx",
275: "Oc", "Oo", "Op", "Os", "Ot", "Ox",
276: "Pa", "Pc", "Pf", "Po", "Pp", "PP", "pp", "Pq",
277: "Qc", "Ql", "Qo", "Qq", "Or", "Rd", "Re", "Rs", "Rv",
278: "Sc", "Sf", "Sh", "SH", "Sm", "So", "Sq",
279: "Ss", "St", "Sx", "Sy",
280: "Ta", "Tn", "Ud", "Ux", "Va", "Vt", "Xc", "Xo", "Xr",
281: "%A", "%B", "%D", "%I", "%J", "%N", "%O",
282: "%P", "%Q", "%R", "%T", "%U", "%V",
283: NULL
284: };
285:
286: const char *const __man_reserved[] = {
287: "AT", "B", "BI", "BR", "BT", "DE", "DS", "DT",
288: "EE", "EN", "EQ", "EX", "HF", "HP", "I", "IB", "IP", "IR",
289: "LP", "ME", "MT", "OP", "P", "PD", "PP", "PT",
290: "R", "RB", "RE", "RI", "RS", "SB", "SH", "SM", "SS", "SY",
291: "TE", "TH", "TP", "TQ", "TS", "T&", "UC", "UE", "UR", "YS",
292: NULL
293: };
294:
1.141 kristaps 295: /* Array of injected predefined strings. */
296: #define PREDEFS_MAX 38
297: static const struct predef predefs[PREDEFS_MAX] = {
298: #include "predefs.in"
299: };
300:
1.155 kristaps 301: /* See roffhash_find() */
1.85 kristaps 302: #define ROFF_HASH(p) (p[0] - ASCII_LO)
303:
1.178 schwarze 304: static int roffit_lines; /* number of lines to delay */
305: static char *roffit_macro; /* nil-terminated macro line */
306:
1.85 kristaps 307: static void
1.155 kristaps 308: roffhash_init(void)
1.85 kristaps 309: {
310: struct roffmac *n;
311: int buc, i;
312:
1.106 kristaps 313: for (i = 0; i < (int)ROFF_USERDEF; i++) {
1.85 kristaps 314: assert(roffs[i].name[0] >= ASCII_LO);
315: assert(roffs[i].name[0] <= ASCII_HI);
316:
317: buc = ROFF_HASH(roffs[i].name);
318:
319: if (NULL != (n = hash[buc])) {
320: for ( ; n->next; n = n->next)
321: /* Do nothing. */ ;
322: n->next = &roffs[i];
323: } else
324: hash[buc] = &roffs[i];
325: }
326: }
327:
1.67 kristaps 328: /*
329: * Look up a roff token by its name. Returns ROFF_MAX if no macro by
330: * the nil-terminated string name could be found.
331: */
332: static enum rofft
1.155 kristaps 333: roffhash_find(const char *p, size_t s)
1.67 kristaps 334: {
1.85 kristaps 335: int buc;
336: struct roffmac *n;
1.67 kristaps 337:
1.85 kristaps 338: /*
339: * libroff has an extremely simple hashtable, for the time
340: * being, which simply keys on the first character, which must
341: * be printable, then walks a chain. It works well enough until
342: * optimised.
343: */
344:
345: if (p[0] < ASCII_LO || p[0] > ASCII_HI)
346: return(ROFF_MAX);
347:
348: buc = ROFF_HASH(p);
349:
350: if (NULL == (n = hash[buc]))
351: return(ROFF_MAX);
352: for ( ; n; n = n->next)
1.106 kristaps 353: if (0 == strncmp(n->name, p, s) && '\0' == n->name[(int)s])
1.85 kristaps 354: return((enum rofft)(n - roffs));
1.67 kristaps 355:
356: return(ROFF_MAX);
357: }
358:
359:
360: /*
361: * Pop the current node off of the stack of roff instructions currently
362: * pending.
363: */
364: static void
365: roffnode_pop(struct roff *r)
366: {
367: struct roffnode *p;
368:
1.75 kristaps 369: assert(r->last);
370: p = r->last;
1.82 kristaps 371:
1.75 kristaps 372: r->last = r->last->parent;
1.106 kristaps 373: free(p->name);
374: free(p->end);
1.67 kristaps 375: free(p);
376: }
377:
378:
379: /*
380: * Push a roff node onto the instruction stack. This must later be
381: * removed with roffnode_pop().
382: */
1.98 schwarze 383: static void
1.106 kristaps 384: roffnode_push(struct roff *r, enum rofft tok, const char *name,
385: int line, int col)
1.67 kristaps 386: {
387: struct roffnode *p;
388:
1.98 schwarze 389: p = mandoc_calloc(1, sizeof(struct roffnode));
1.67 kristaps 390: p->tok = tok;
1.106 kristaps 391: if (name)
392: p->name = mandoc_strdup(name);
1.67 kristaps 393: p->parent = r->last;
394: p->line = line;
395: p->col = col;
1.79 kristaps 396: p->rule = p->parent ? p->parent->rule : ROFFRULE_DENY;
1.67 kristaps 397:
398: r->last = p;
399: }
400:
401:
402: static void
403: roff_free1(struct roff *r)
404: {
1.176 schwarze 405: struct tbl_node *tbl;
1.125 kristaps 406: struct eqn_node *e;
1.167 kristaps 407: int i;
1.67 kristaps 408:
1.176 schwarze 409: while (NULL != (tbl = r->first_tbl)) {
410: r->first_tbl = tbl->next;
411: tbl_free(tbl);
1.109 kristaps 412: }
413:
1.113 kristaps 414: r->first_tbl = r->last_tbl = r->tbl = NULL;
415:
1.125 kristaps 416: while (NULL != (e = r->first_eqn)) {
417: r->first_eqn = e->next;
418: eqn_free(e);
419: }
420:
421: r->first_eqn = r->last_eqn = r->eqn = NULL;
422:
1.67 kristaps 423: while (r->last)
424: roffnode_pop(r);
1.109 kristaps 425:
1.167 kristaps 426: roff_freestr(r->strtab);
427: roff_freestr(r->xmbtab);
428:
429: r->strtab = r->xmbtab = NULL;
430:
1.180 schwarze 431: roff_freereg(r->regtab);
432:
433: r->regtab = NULL;
434:
1.167 kristaps 435: if (r->xtab)
436: for (i = 0; i < 128; i++)
437: free(r->xtab[i].p);
438:
439: free(r->xtab);
440: r->xtab = NULL;
1.67 kristaps 441: }
442:
443: void
444: roff_reset(struct roff *r)
445: {
1.143 kristaps 446: int i;
1.67 kristaps 447:
448: roff_free1(r);
1.143 kristaps 449:
1.174 kristaps 450: r->control = 0;
1.147 kristaps 451:
1.143 kristaps 452: for (i = 0; i < PREDEFS_MAX; i++)
453: roff_setstr(r, predefs[i].name, predefs[i].str, 0);
1.67 kristaps 454: }
455:
456:
457: void
458: roff_free(struct roff *r)
459: {
460:
461: roff_free1(r);
462: free(r);
463: }
464:
465:
466: struct roff *
1.175 schwarze 467: roff_alloc(enum mparset type, struct mparse *parse)
1.67 kristaps 468: {
469: struct roff *r;
1.141 kristaps 470: int i;
1.67 kristaps 471:
1.98 schwarze 472: r = mandoc_calloc(1, sizeof(struct roff));
1.175 schwarze 473: r->parsetype = type;
1.128 kristaps 474: r->parse = parse;
1.82 kristaps 475: r->rstackpos = -1;
1.85 kristaps 476:
1.155 kristaps 477: roffhash_init();
1.141 kristaps 478:
479: for (i = 0; i < PREDEFS_MAX; i++)
480: roff_setstr(r, predefs[i].name, predefs[i].str, 0);
481:
1.67 kristaps 482: return(r);
483: }
484:
1.94 kristaps 485: /*
1.181 schwarze 486: * In the current line, expand user-defined strings ("\*")
487: * and references to number registers ("\n").
488: * Also check the syntax of other escape sequences.
1.154 kristaps 489: */
1.172 schwarze 490: static enum rofferr
1.142 kristaps 491: roff_res(struct roff *r, char **bufp, size_t *szp, int ln, int pos)
1.94 kristaps 492: {
1.181 schwarze 493: char ubuf[12]; /* buffer to print the number */
1.108 schwarze 494: const char *stesc; /* start of an escape sequence ('\\') */
495: const char *stnam; /* start of the name, after "[(*" */
496: const char *cp; /* end of the name, e.g. before ']' */
497: const char *res; /* the string to be substituted */
1.181 schwarze 498: char *nbuf; /* new buffer to copy bufp to */
499: size_t nsz; /* size of the new buffer */
500: size_t maxl; /* expected length of the escape name */
501: size_t naml; /* actual length of the escape name */
502: int expand_count; /* to avoid infinite loops */
1.94 kristaps 503:
1.170 schwarze 504: expand_count = 0;
505:
1.154 kristaps 506: again:
1.108 schwarze 507: cp = *bufp + pos;
508: while (NULL != (cp = strchr(cp, '\\'))) {
509: stesc = cp++;
510:
511: /*
1.181 schwarze 512: * The second character must be an asterisk or an n.
1.108 schwarze 513: * If it isn't, skip it anyway: It is escaped,
514: * so it can't start another escape sequence.
515: */
516:
517: if ('\0' == *cp)
1.172 schwarze 518: return(ROFF_CONT);
1.152 kristaps 519:
1.181 schwarze 520: switch (*cp) {
521: case ('*'):
522: res = NULL;
523: break;
524: case ('n'):
525: res = ubuf;
526: break;
527: default:
528: if (ESCAPE_ERROR != mandoc_escape(&cp, NULL, NULL))
1.152 kristaps 529: continue;
1.153 kristaps 530: mandoc_msg
531: (MANDOCERR_BADESCAPE, r->parse,
532: ln, (int)(stesc - *bufp), NULL);
1.172 schwarze 533: return(ROFF_CONT);
1.152 kristaps 534: }
535:
536: cp++;
1.108 schwarze 537:
538: /*
539: * The third character decides the length
1.181 schwarze 540: * of the name of the string or register.
1.108 schwarze 541: * Save a pointer to the name.
542: */
543:
1.94 kristaps 544: switch (*cp) {
1.108 schwarze 545: case ('\0'):
1.172 schwarze 546: return(ROFF_CONT);
1.94 kristaps 547: case ('('):
548: cp++;
549: maxl = 2;
550: break;
551: case ('['):
552: cp++;
553: maxl = 0;
554: break;
555: default:
556: maxl = 1;
557: break;
558: }
1.108 schwarze 559: stnam = cp;
1.94 kristaps 560:
1.108 schwarze 561: /* Advance to the end of the name. */
1.94 kristaps 562:
1.181 schwarze 563: for (naml = 0; 0 == maxl || naml < maxl; naml++, cp++) {
1.153 kristaps 564: if ('\0' == *cp) {
565: mandoc_msg
566: (MANDOCERR_BADESCAPE,
567: r->parse, ln,
568: (int)(stesc - *bufp), NULL);
1.172 schwarze 569: return(ROFF_CONT);
1.153 kristaps 570: }
1.94 kristaps 571: if (0 == maxl && ']' == *cp)
572: break;
573: }
574:
1.108 schwarze 575: /*
576: * Retrieve the replacement string; if it is
577: * undefined, resume searching for escapes.
578: */
579:
1.181 schwarze 580: if (NULL == res)
581: res = roff_getstrn(r, stnam, naml);
582: else
583: snprintf(ubuf, sizeof(ubuf), "%d",
584: roff_getregn(r, stnam, naml));
1.94 kristaps 585:
586: if (NULL == res) {
1.153 kristaps 587: mandoc_msg
588: (MANDOCERR_BADESCAPE, r->parse,
589: ln, (int)(stesc - *bufp), NULL);
1.142 kristaps 590: res = "";
1.94 kristaps 591: }
592:
1.108 schwarze 593: /* Replace the escape sequence by the string. */
594:
1.161 kristaps 595: pos = stesc - *bufp;
1.154 kristaps 596:
1.94 kristaps 597: nsz = *szp + strlen(res) + 1;
1.181 schwarze 598: nbuf = mandoc_malloc(nsz);
1.94 kristaps 599:
1.181 schwarze 600: strlcpy(nbuf, *bufp, (size_t)(stesc - *bufp + 1));
601: strlcat(nbuf, res, nsz);
602: strlcat(nbuf, cp + (maxl ? 0 : 1), nsz);
1.94 kristaps 603:
604: free(*bufp);
605:
1.181 schwarze 606: *bufp = nbuf;
1.94 kristaps 607: *szp = nsz;
1.170 schwarze 608:
609: if (EXPAND_LIMIT >= ++expand_count)
610: goto again;
611:
612: /* Just leave the string unexpanded. */
613: mandoc_msg(MANDOCERR_ROFFLOOP, r->parse, ln, pos, NULL);
1.172 schwarze 614: return(ROFF_IGN);
1.154 kristaps 615: }
1.172 schwarze 616: return(ROFF_CONT);
1.154 kristaps 617: }
618:
619: /*
1.178 schwarze 620: * Process text streams:
621: * Convert all breakable hyphens into ASCII_HYPH.
622: * Decrement and spring input line trap.
1.154 kristaps 623: */
624: static enum rofferr
1.178 schwarze 625: roff_parsetext(char **bufp, size_t *szp, int pos, int *offs)
1.154 kristaps 626: {
627: size_t sz;
628: const char *start;
1.178 schwarze 629: char *p;
630: int isz;
1.154 kristaps 631: enum mandoc_esc esc;
632:
1.178 schwarze 633: start = p = *bufp + pos;
1.154 kristaps 634:
635: while ('\0' != *p) {
636: sz = strcspn(p, "-\\");
637: p += sz;
638:
1.159 kristaps 639: if ('\0' == *p)
640: break;
641:
1.154 kristaps 642: if ('\\' == *p) {
643: /* Skip over escapes. */
644: p++;
645: esc = mandoc_escape
1.179 schwarze 646: ((const char const **)&p, NULL, NULL);
1.154 kristaps 647: if (ESCAPE_ERROR == esc)
648: break;
1.155 kristaps 649: continue;
1.159 kristaps 650: } else if (p == start) {
1.158 kristaps 651: p++;
1.155 kristaps 652: continue;
1.158 kristaps 653: }
1.155 kristaps 654:
1.171 schwarze 655: if (isalpha((unsigned char)p[-1]) &&
656: isalpha((unsigned char)p[1]))
1.155 kristaps 657: *p = ASCII_HYPH;
658: p++;
1.94 kristaps 659: }
660:
1.178 schwarze 661: /* Spring the input line trap. */
662: if (1 == roffit_lines) {
663: isz = asprintf(&p, "%s\n.%s", *bufp, roffit_macro);
664: if (-1 == isz) {
665: perror(NULL);
666: exit((int)MANDOCLEVEL_SYSERR);
667: }
668: free(*bufp);
669: *bufp = p;
670: *szp = isz + 1;
671: *offs = 0;
672: free(roffit_macro);
673: roffit_lines = 0;
674: return(ROFF_REPARSE);
675: } else if (1 < roffit_lines)
676: --roffit_lines;
1.154 kristaps 677: return(ROFF_CONT);
1.94 kristaps 678: }
679:
1.67 kristaps 680: enum rofferr
1.90 kristaps 681: roff_parseln(struct roff *r, int ln, char **bufp,
682: size_t *szp, int pos, int *offs)
1.67 kristaps 683: {
684: enum rofft t;
1.109 kristaps 685: enum rofferr e;
1.130 kristaps 686: int ppos, ctl;
1.79 kristaps 687:
688: /*
1.94 kristaps 689: * Run the reserved-word filter only if we have some reserved
690: * words to fill in.
691: */
692:
1.172 schwarze 693: e = roff_res(r, bufp, szp, ln, pos);
694: if (ROFF_IGN == e)
695: return(e);
696: assert(ROFF_CONT == e);
1.94 kristaps 697:
1.130 kristaps 698: ppos = pos;
1.174 kristaps 699: ctl = roff_getcontrol(r, *bufp, &pos);
1.130 kristaps 700:
1.94 kristaps 701: /*
1.79 kristaps 702: * First, if a scope is open and we're not a macro, pass the
703: * text through the macro's filter. If a scope isn't open and
704: * we're not a macro, just let it through.
1.125 kristaps 705: * Finally, if there's an equation scope open, divert it into it
706: * no matter our state.
1.79 kristaps 707: */
1.74 kristaps 708:
1.130 kristaps 709: if (r->last && ! ctl) {
1.78 kristaps 710: t = r->last->tok;
711: assert(roffs[t].text);
1.109 kristaps 712: e = (*roffs[t].text)
713: (r, t, bufp, szp, ln, pos, pos, offs);
714: assert(ROFF_IGN == e || ROFF_CONT == e);
1.125 kristaps 715: if (ROFF_CONT != e)
716: return(e);
1.182 schwarze 717: }
718: if (r->eqn)
719: return(eqn_read(&r->eqn, ln, *bufp, ppos, offs));
720: if ( ! ctl) {
1.125 kristaps 721: if (r->tbl)
1.130 kristaps 722: return(tbl_read(r->tbl, ln, *bufp, pos));
1.178 schwarze 723: return(roff_parsetext(bufp, szp, pos, offs));
1.182 schwarze 724: }
1.67 kristaps 725:
1.79 kristaps 726: /*
727: * If a scope is open, go to the child handler for that macro,
728: * as it may want to preprocess before doing anything with it.
1.125 kristaps 729: * Don't do so if an equation is open.
1.79 kristaps 730: */
1.78 kristaps 731:
1.79 kristaps 732: if (r->last) {
733: t = r->last->tok;
734: assert(roffs[t].sub);
735: return((*roffs[t].sub)
1.90 kristaps 736: (r, t, bufp, szp,
1.130 kristaps 737: ln, ppos, pos, offs));
1.79 kristaps 738: }
1.78 kristaps 739:
1.79 kristaps 740: /*
741: * Lastly, as we've no scope open, try to look up and execute
742: * the new macro. If no macro is found, simply return and let
743: * the compilers handle it.
744: */
1.67 kristaps 745:
1.106 kristaps 746: if (ROFF_MAX == (t = roff_parse(r, *bufp, &pos)))
1.79 kristaps 747: return(ROFF_CONT);
1.67 kristaps 748:
1.75 kristaps 749: assert(roffs[t].proc);
1.78 kristaps 750: return((*roffs[t].proc)
1.90 kristaps 751: (r, t, bufp, szp,
752: ln, ppos, pos, offs));
1.74 kristaps 753: }
754:
755:
1.117 kristaps 756: void
1.74 kristaps 757: roff_endparse(struct roff *r)
758: {
759:
1.110 kristaps 760: if (r->last)
1.128 kristaps 761: mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse,
1.109 kristaps 762: r->last->line, r->last->col, NULL);
1.117 kristaps 763:
1.125 kristaps 764: if (r->eqn) {
1.128 kristaps 765: mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse,
1.148 kristaps 766: r->eqn->eqn.ln, r->eqn->eqn.pos, NULL);
1.151 kristaps 767: eqn_end(&r->eqn);
1.125 kristaps 768: }
769:
1.117 kristaps 770: if (r->tbl) {
1.128 kristaps 771: mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse,
1.117 kristaps 772: r->tbl->line, r->tbl->pos, NULL);
1.151 kristaps 773: tbl_end(&r->tbl);
1.117 kristaps 774: }
1.67 kristaps 775: }
776:
777: /*
778: * Parse a roff node's type from the input buffer. This must be in the
779: * form of ".foo xxx" in the usual way.
780: */
781: static enum rofft
1.106 kristaps 782: roff_parse(struct roff *r, const char *buf, int *pos)
1.67 kristaps 783: {
1.106 kristaps 784: const char *mac;
785: size_t maclen;
1.67 kristaps 786: enum rofft t;
787:
1.144 kristaps 788: if ('\0' == buf[*pos] || '"' == buf[*pos] ||
789: '\t' == buf[*pos] || ' ' == buf[*pos])
1.67 kristaps 790: return(ROFF_MAX);
791:
1.144 kristaps 792: /*
793: * We stop the macro parse at an escape, tab, space, or nil.
794: * However, `\}' is also a valid macro, so make sure we don't
795: * clobber it by seeing the `\' as the end of token.
796: */
797:
1.106 kristaps 798: mac = buf + *pos;
1.144 kristaps 799: maclen = strcspn(mac + 1, " \\\t\0") + 1;
1.67 kristaps 800:
1.106 kristaps 801: t = (r->current_string = roff_getstrn(r, mac, maclen))
1.155 kristaps 802: ? ROFF_USERDEF : roffhash_find(mac, maclen);
1.67 kristaps 803:
1.127 kristaps 804: *pos += (int)maclen;
1.130 kristaps 805:
1.67 kristaps 806: while (buf[*pos] && ' ' == buf[*pos])
807: (*pos)++;
808:
809: return(t);
810: }
811:
812: /* ARGSUSED */
813: static enum rofferr
1.76 kristaps 814: roff_cblock(ROFF_ARGS)
1.67 kristaps 815: {
816:
1.79 kristaps 817: /*
818: * A block-close `..' should only be invoked as a child of an
819: * ignore macro, otherwise raise a warning and just ignore it.
820: */
821:
1.76 kristaps 822: if (NULL == r->last) {
1.128 kristaps 823: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.76 kristaps 824: return(ROFF_IGN);
825: }
1.67 kristaps 826:
1.81 kristaps 827: switch (r->last->tok) {
828: case (ROFF_am):
829: /* FALLTHROUGH */
830: case (ROFF_ami):
831: /* FALLTHROUGH */
832: case (ROFF_am1):
833: /* FALLTHROUGH */
834: case (ROFF_de):
1.108 schwarze 835: /* ROFF_de1 is remapped to ROFF_de in roff_block(). */
1.81 kristaps 836: /* FALLTHROUGH */
837: case (ROFF_dei):
838: /* FALLTHROUGH */
839: case (ROFF_ig):
840: break;
841: default:
1.128 kristaps 842: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.67 kristaps 843: return(ROFF_IGN);
1.76 kristaps 844: }
1.67 kristaps 845:
1.76 kristaps 846: if ((*bufp)[pos])
1.128 kristaps 847: mandoc_msg(MANDOCERR_ARGSLOST, r->parse, ln, pos, NULL);
1.71 kristaps 848:
849: roffnode_pop(r);
1.76 kristaps 850: roffnode_cleanscope(r);
851: return(ROFF_IGN);
1.71 kristaps 852:
1.67 kristaps 853: }
854:
855:
1.76 kristaps 856: static void
857: roffnode_cleanscope(struct roff *r)
1.67 kristaps 858: {
859:
1.76 kristaps 860: while (r->last) {
1.173 schwarze 861: if (--r->last->endspan != 0)
1.76 kristaps 862: break;
863: roffnode_pop(r);
864: }
1.67 kristaps 865: }
866:
867:
1.75 kristaps 868: /* ARGSUSED */
1.74 kristaps 869: static enum rofferr
1.75 kristaps 870: roff_ccond(ROFF_ARGS)
1.74 kristaps 871: {
872:
1.76 kristaps 873: if (NULL == r->last) {
1.128 kristaps 874: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.76 kristaps 875: return(ROFF_IGN);
876: }
877:
1.82 kristaps 878: switch (r->last->tok) {
879: case (ROFF_el):
880: /* FALLTHROUGH */
881: case (ROFF_ie):
882: /* FALLTHROUGH */
883: case (ROFF_if):
884: break;
885: default:
1.128 kristaps 886: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.75 kristaps 887: return(ROFF_IGN);
888: }
889:
1.76 kristaps 890: if (r->last->endspan > -1) {
1.128 kristaps 891: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.76 kristaps 892: return(ROFF_IGN);
893: }
894:
895: if ((*bufp)[pos])
1.128 kristaps 896: mandoc_msg(MANDOCERR_ARGSLOST, r->parse, ln, pos, NULL);
1.76 kristaps 897:
1.75 kristaps 898: roffnode_pop(r);
1.76 kristaps 899: roffnode_cleanscope(r);
900: return(ROFF_IGN);
901: }
902:
1.75 kristaps 903:
1.76 kristaps 904: /* ARGSUSED */
905: static enum rofferr
1.80 kristaps 906: roff_block(ROFF_ARGS)
1.76 kristaps 907: {
1.78 kristaps 908: int sv;
909: size_t sz;
1.106 kristaps 910: char *name;
911:
912: name = NULL;
1.76 kristaps 913:
1.106 kristaps 914: if (ROFF_ig != tok) {
915: if ('\0' == (*bufp)[pos]) {
1.128 kristaps 916: mandoc_msg(MANDOCERR_NOARGS, r->parse, ln, ppos, NULL);
1.106 kristaps 917: return(ROFF_IGN);
918: }
1.107 kristaps 919:
920: /*
921: * Re-write `de1', since we don't really care about
922: * groff's strange compatibility mode, into `de'.
923: */
924:
1.106 kristaps 925: if (ROFF_de1 == tok)
926: tok = ROFF_de;
927: if (ROFF_de == tok)
928: name = *bufp + pos;
929: else
1.128 kristaps 930: mandoc_msg(MANDOCERR_REQUEST, r->parse, ln, ppos,
1.106 kristaps 931: roffs[tok].name);
1.107 kristaps 932:
1.131 schwarze 933: while ((*bufp)[pos] && ! isspace((unsigned char)(*bufp)[pos]))
1.80 kristaps 934: pos++;
1.107 kristaps 935:
1.131 schwarze 936: while (isspace((unsigned char)(*bufp)[pos]))
1.106 kristaps 937: (*bufp)[pos++] = '\0';
1.80 kristaps 938: }
939:
1.106 kristaps 940: roffnode_push(r, tok, name, ln, ppos);
941:
942: /*
943: * At the beginning of a `de' macro, clear the existing string
944: * with the same name, if there is one. New content will be
945: * added from roff_block_text() in multiline mode.
946: */
1.107 kristaps 947:
1.106 kristaps 948: if (ROFF_de == tok)
1.108 schwarze 949: roff_setstr(r, name, "", 0);
1.76 kristaps 950:
1.79 kristaps 951: if ('\0' == (*bufp)[pos])
1.78 kristaps 952: return(ROFF_IGN);
953:
1.107 kristaps 954: /* If present, process the custom end-of-line marker. */
955:
1.78 kristaps 956: sv = pos;
1.131 schwarze 957: while ((*bufp)[pos] && ! isspace((unsigned char)(*bufp)[pos]))
1.78 kristaps 958: pos++;
959:
960: /*
961: * Note: groff does NOT like escape characters in the input.
962: * Instead of detecting this, we're just going to let it fly and
963: * to hell with it.
964: */
965:
966: assert(pos > sv);
967: sz = (size_t)(pos - sv);
968:
1.79 kristaps 969: if (1 == sz && '.' == (*bufp)[sv])
970: return(ROFF_IGN);
971:
1.98 schwarze 972: r->last->end = mandoc_malloc(sz + 1);
1.78 kristaps 973:
974: memcpy(r->last->end, *bufp + sv, sz);
975: r->last->end[(int)sz] = '\0';
976:
1.77 kristaps 977: if ((*bufp)[pos])
1.128 kristaps 978: mandoc_msg(MANDOCERR_ARGSLOST, r->parse, ln, pos, NULL);
1.74 kristaps 979:
1.78 kristaps 980: return(ROFF_IGN);
981: }
982:
983:
984: /* ARGSUSED */
985: static enum rofferr
1.80 kristaps 986: roff_block_sub(ROFF_ARGS)
1.79 kristaps 987: {
988: enum rofft t;
989: int i, j;
990:
991: /*
992: * First check whether a custom macro exists at this level. If
993: * it does, then check against it. This is some of groff's
994: * stranger behaviours. If we encountered a custom end-scope
995: * tag and that tag also happens to be a "real" macro, then we
996: * need to try interpreting it again as a real macro. If it's
997: * not, then return ignore. Else continue.
998: */
999:
1000: if (r->last->end) {
1.130 kristaps 1001: for (i = pos, j = 0; r->last->end[j]; j++, i++)
1.79 kristaps 1002: if ((*bufp)[i] != r->last->end[j])
1003: break;
1004:
1005: if ('\0' == r->last->end[j] &&
1006: ('\0' == (*bufp)[i] ||
1007: ' ' == (*bufp)[i] ||
1008: '\t' == (*bufp)[i])) {
1009: roffnode_pop(r);
1010: roffnode_cleanscope(r);
1011:
1.130 kristaps 1012: while (' ' == (*bufp)[i] || '\t' == (*bufp)[i])
1013: i++;
1014:
1015: pos = i;
1.106 kristaps 1016: if (ROFF_MAX != roff_parse(r, *bufp, &pos))
1.79 kristaps 1017: return(ROFF_RERUN);
1018: return(ROFF_IGN);
1019: }
1020: }
1021:
1022: /*
1023: * If we have no custom end-query or lookup failed, then try
1024: * pulling it out of the hashtable.
1025: */
1026:
1.137 schwarze 1027: t = roff_parse(r, *bufp, &pos);
1.79 kristaps 1028:
1.106 kristaps 1029: /*
1030: * Macros other than block-end are only significant
1031: * in `de' blocks; elsewhere, simply throw them away.
1032: */
1033: if (ROFF_cblock != t) {
1034: if (ROFF_de == tok)
1035: roff_setstr(r, r->last->name, *bufp + ppos, 1);
1.79 kristaps 1036: return(ROFF_IGN);
1.106 kristaps 1037: }
1.79 kristaps 1038:
1039: assert(roffs[t].proc);
1.90 kristaps 1040: return((*roffs[t].proc)(r, t, bufp, szp,
1041: ln, ppos, pos, offs));
1.79 kristaps 1042: }
1043:
1044:
1045: /* ARGSUSED */
1046: static enum rofferr
1.80 kristaps 1047: roff_block_text(ROFF_ARGS)
1.78 kristaps 1048: {
1049:
1.106 kristaps 1050: if (ROFF_de == tok)
1051: roff_setstr(r, r->last->name, *bufp + pos, 1);
1052:
1.78 kristaps 1053: return(ROFF_IGN);
1054: }
1055:
1056:
1057: /* ARGSUSED */
1058: static enum rofferr
1.82 kristaps 1059: roff_cond_sub(ROFF_ARGS)
1060: {
1061: enum rofft t;
1062: enum roffrule rr;
1.139 kristaps 1063: char *ep;
1.82 kristaps 1064:
1065: rr = r->last->rule;
1.139 kristaps 1066: roffnode_cleanscope(r);
1.177 schwarze 1067: t = roff_parse(r, *bufp, &pos);
1.82 kristaps 1068:
1.139 kristaps 1069: /*
1.177 schwarze 1070: * Fully handle known macros when they are structurally
1071: * required or when the conditional evaluated to true.
1.87 kristaps 1072: */
1073:
1.177 schwarze 1074: if ((ROFF_MAX != t) &&
1075: (ROFF_ccond == t || ROFFRULE_ALLOW == rr ||
1076: ROFFMAC_STRUCT & roffs[t].flags)) {
1077: assert(roffs[t].proc);
1078: return((*roffs[t].proc)(r, t, bufp, szp,
1079: ln, ppos, pos, offs));
1080: }
1.144 kristaps 1081:
1.177 schwarze 1082: /* Always check for the closing delimiter `\}'. */
1.144 kristaps 1083:
1.177 schwarze 1084: ep = &(*bufp)[pos];
1085: while (NULL != (ep = strchr(ep, '\\'))) {
1086: if ('}' != *(++ep))
1087: continue;
1.82 kristaps 1088:
1.177 schwarze 1089: /*
1090: * If we're at the end of line, then just chop
1091: * off the \} and resize the buffer.
1092: * If we aren't, then convert it to spaces.
1093: */
1.139 kristaps 1094:
1.177 schwarze 1095: if ('\0' == *(ep + 1)) {
1096: *--ep = '\0';
1097: *szp -= 2;
1098: } else
1099: *(ep - 1) = *ep = ' ';
1.82 kristaps 1100:
1.177 schwarze 1101: roff_ccond(r, ROFF_ccond, bufp, szp,
1102: ln, pos, pos + 2, offs);
1103: break;
1104: }
1105: return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
1.82 kristaps 1106: }
1107:
1108: /* ARGSUSED */
1109: static enum rofferr
1110: roff_cond_text(ROFF_ARGS)
1.78 kristaps 1111: {
1.140 kristaps 1112: char *ep;
1.82 kristaps 1113: enum roffrule rr;
1114:
1115: rr = r->last->rule;
1.140 kristaps 1116: roffnode_cleanscope(r);
1.82 kristaps 1117:
1.140 kristaps 1118: ep = &(*bufp)[pos];
1119: for ( ; NULL != (ep = strchr(ep, '\\')); ep++) {
1120: ep++;
1121: if ('}' != *ep)
1122: continue;
1123: *ep = '&';
1124: roff_ccond(r, ROFF_ccond, bufp, szp,
1125: ln, pos, pos + 2, offs);
1.78 kristaps 1126: }
1.82 kristaps 1127: return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
1.74 kristaps 1128: }
1129:
1.184 ! schwarze 1130: static int
! 1131: roff_getnum(const char *v, int *pos, int *res)
! 1132: {
! 1133: int p, n;
! 1134:
! 1135: p = *pos;
! 1136: n = v[p] == '-';
! 1137: if (n)
! 1138: p++;
! 1139:
! 1140: for (*res = 0; isdigit((unsigned char)v[p]); p++)
! 1141: *res += 10 * *res + v[p] - '0';
! 1142: if (p == *pos + n)
! 1143: return 0;
! 1144:
! 1145: if (n)
! 1146: *res = -*res;
! 1147:
! 1148: *pos = p;
! 1149: return 1;
! 1150: }
! 1151:
! 1152: static int
! 1153: roff_getop(const char *v, int *pos, char *res)
! 1154: {
! 1155: int e;
! 1156:
! 1157: *res = v[*pos];
! 1158: e = v[*pos + 1] == '=';
! 1159:
! 1160: switch (*res) {
! 1161: case '=':
! 1162: break;
! 1163: case '>':
! 1164: if (e)
! 1165: *res = 'g';
! 1166: break;
! 1167: case '<':
! 1168: if (e)
! 1169: *res = 'l';
! 1170: break;
! 1171: default:
! 1172: return(0);
! 1173: }
! 1174:
! 1175: *pos += 1 + e;
! 1176:
! 1177: return(*res);
! 1178: }
! 1179:
1.88 kristaps 1180: static enum roffrule
1181: roff_evalcond(const char *v, int *pos)
1182: {
1.184 ! schwarze 1183: int not, lh, rh;
! 1184: char op;
1.88 kristaps 1185:
1186: switch (v[*pos]) {
1187: case ('n'):
1188: (*pos)++;
1189: return(ROFFRULE_ALLOW);
1190: case ('e'):
1191: /* FALLTHROUGH */
1192: case ('o'):
1193: /* FALLTHROUGH */
1194: case ('t'):
1195: (*pos)++;
1196: return(ROFFRULE_DENY);
1.184 ! schwarze 1197: case ('!'):
! 1198: (*pos)++;
! 1199: not = 1;
! 1200: break;
1.88 kristaps 1201: default:
1.184 ! schwarze 1202: not = 0;
1.88 kristaps 1203: break;
1204: }
1205:
1.184 ! schwarze 1206: if (!roff_getnum(v, pos, &lh))
! 1207: return ROFFRULE_DENY;
! 1208: if (!roff_getop(v, pos, &op)) {
! 1209: if (lh < 0)
! 1210: lh = 0;
! 1211: goto out;
! 1212: }
! 1213: if (!roff_getnum(v, pos, &rh))
! 1214: return ROFFRULE_DENY;
! 1215: switch (op) {
! 1216: case 'g':
! 1217: lh = lh >= rh;
! 1218: break;
! 1219: case 'l':
! 1220: lh = lh <= rh;
! 1221: break;
! 1222: case '=':
! 1223: lh = lh == rh;
! 1224: break;
! 1225: case '>':
! 1226: lh = lh > rh;
! 1227: break;
! 1228: case '<':
! 1229: lh = lh < rh;
! 1230: break;
! 1231: default:
! 1232: return ROFFRULE_DENY;
! 1233: }
! 1234: out:
! 1235: if (not)
! 1236: lh = !lh;
! 1237: return lh ? ROFFRULE_ALLOW : ROFFRULE_DENY;
1.88 kristaps 1238: }
1239:
1.75 kristaps 1240: /* ARGSUSED */
1.74 kristaps 1241: static enum rofferr
1.103 kristaps 1242: roff_line_ignore(ROFF_ARGS)
1.89 kristaps 1243: {
1.123 schwarze 1244:
1.89 kristaps 1245: return(ROFF_IGN);
1246: }
1247:
1.104 kristaps 1248: /* ARGSUSED */
1249: static enum rofferr
1.82 kristaps 1250: roff_cond(ROFF_ARGS)
1.74 kristaps 1251: {
1.173 schwarze 1252:
1253: roffnode_push(r, tok, NULL, ln, ppos);
1.74 kristaps 1254:
1.134 kristaps 1255: /*
1256: * An `.el' has no conditional body: it will consume the value
1257: * of the current rstack entry set in prior `ie' calls or
1258: * defaults to DENY.
1259: *
1260: * If we're not an `el', however, then evaluate the conditional.
1261: */
1.133 kristaps 1262:
1.173 schwarze 1263: r->last->rule = ROFF_el == tok ?
1.134 kristaps 1264: (r->rstackpos < 0 ?
1265: ROFFRULE_DENY : r->rstack[r->rstackpos--]) :
1266: roff_evalcond(*bufp, &pos);
1.77 kristaps 1267:
1.134 kristaps 1268: /*
1269: * An if-else will put the NEGATION of the current evaluated
1270: * conditional into the stack of rules.
1271: */
1272:
1.84 schwarze 1273: if (ROFF_ie == tok) {
1.134 kristaps 1274: if (r->rstackpos == RSTACK_MAX - 1) {
1275: mandoc_msg(MANDOCERR_MEM,
1276: r->parse, ln, ppos, NULL);
1277: return(ROFF_ERR);
1278: }
1279: r->rstack[++r->rstackpos] =
1280: ROFFRULE_DENY == r->last->rule ?
1281: ROFFRULE_ALLOW : ROFFRULE_DENY;
1.82 kristaps 1282: }
1.88 kristaps 1283:
1284: /* If the parent has false as its rule, then so do we. */
1285:
1.109 kristaps 1286: if (r->last->parent && ROFFRULE_DENY == r->last->parent->rule)
1.84 schwarze 1287: r->last->rule = ROFFRULE_DENY;
1.88 kristaps 1288:
1289: /*
1.173 schwarze 1290: * Determine scope.
1291: * If there is nothing on the line after the conditional,
1292: * not even whitespace, use next-line scope.
1.88 kristaps 1293: */
1.74 kristaps 1294:
1.173 schwarze 1295: if ('\0' == (*bufp)[pos]) {
1296: r->last->endspan = 2;
1297: goto out;
1298: }
1299:
1300: while (' ' == (*bufp)[pos])
1301: pos++;
1302:
1303: /* An opening brace requests multiline scope. */
1.75 kristaps 1304:
1305: if ('\\' == (*bufp)[pos] && '{' == (*bufp)[pos + 1]) {
1306: r->last->endspan = -1;
1307: pos += 2;
1.173 schwarze 1308: goto out;
1.109 kristaps 1309: }
1.74 kristaps 1310:
1.77 kristaps 1311: /*
1.173 schwarze 1312: * Anything else following the conditional causes
1313: * single-line scope. Warn if the scope contains
1314: * nothing but trailing whitespace.
1.77 kristaps 1315: */
1316:
1.75 kristaps 1317: if ('\0' == (*bufp)[pos])
1.173 schwarze 1318: mandoc_msg(MANDOCERR_NOARGS, r->parse, ln, ppos, NULL);
1.77 kristaps 1319:
1.173 schwarze 1320: r->last->endspan = 1;
1.74 kristaps 1321:
1.173 schwarze 1322: out:
1.75 kristaps 1323: *offs = pos;
1324: return(ROFF_RERUN);
1.83 schwarze 1325: }
1326:
1327:
1328: /* ARGSUSED */
1329: static enum rofferr
1.92 schwarze 1330: roff_ds(ROFF_ARGS)
1331: {
1.96 kristaps 1332: char *name, *string;
1333:
1334: /*
1335: * A symbol is named by the first word following the macro
1336: * invocation up to a space. Its value is anything after the
1337: * name's trailing whitespace and optional double-quote. Thus,
1338: *
1339: * [.ds foo "bar " ]
1340: *
1341: * will have `bar " ' as its value.
1342: */
1.92 schwarze 1343:
1.121 schwarze 1344: string = *bufp + pos;
1345: name = roff_getname(r, &string, ln, pos);
1.92 schwarze 1346: if ('\0' == *name)
1347: return(ROFF_IGN);
1348:
1.121 schwarze 1349: /* Read past initial double-quote. */
1350: if ('"' == *string)
1.92 schwarze 1351: string++;
1352:
1.96 kristaps 1353: /* The rest is the value. */
1.106 kristaps 1354: roff_setstr(r, name, string, 0);
1.92 schwarze 1355: return(ROFF_IGN);
1356: }
1357:
1.180 schwarze 1358: void
1.181 schwarze 1359: roff_setreg(struct roff *r, const char *name, int val)
1.147 kristaps 1360: {
1.180 schwarze 1361: struct roffreg *reg;
1362:
1363: /* Search for an existing register with the same name. */
1364: reg = r->regtab;
1365:
1366: while (reg && strcmp(name, reg->key.p))
1367: reg = reg->next;
1.147 kristaps 1368:
1.180 schwarze 1369: if (NULL == reg) {
1370: /* Create a new register. */
1371: reg = mandoc_malloc(sizeof(struct roffreg));
1372: reg->key.p = mandoc_strdup(name);
1373: reg->key.sz = strlen(name);
1374: reg->next = r->regtab;
1375: r->regtab = reg;
1376: }
1377:
1.181 schwarze 1378: reg->val = val;
1.147 kristaps 1379: }
1380:
1.181 schwarze 1381: int
1.180 schwarze 1382: roff_getreg(const struct roff *r, const char *name)
1.147 kristaps 1383: {
1.180 schwarze 1384: struct roffreg *reg;
1385:
1386: for (reg = r->regtab; reg; reg = reg->next)
1387: if (0 == strcmp(name, reg->key.p))
1.181 schwarze 1388: return(reg->val);
1389:
1390: return(0);
1391: }
1392:
1393: static int
1394: roff_getregn(const struct roff *r, const char *name, size_t len)
1395: {
1396: struct roffreg *reg;
1397:
1398: for (reg = r->regtab; reg; reg = reg->next)
1399: if (len == reg->key.sz &&
1400: 0 == strncmp(name, reg->key.p, len))
1401: return(reg->val);
1.147 kristaps 1402:
1.180 schwarze 1403: return(0);
1.147 kristaps 1404: }
1405:
1.180 schwarze 1406: static void
1407: roff_freereg(struct roffreg *reg)
1.147 kristaps 1408: {
1.180 schwarze 1409: struct roffreg *old_reg;
1.147 kristaps 1410:
1.180 schwarze 1411: while (NULL != reg) {
1412: free(reg->key.p);
1413: old_reg = reg;
1414: reg = reg->next;
1415: free(old_reg);
1416: }
1.147 kristaps 1417: }
1.92 schwarze 1418:
1419: /* ARGSUSED */
1420: static enum rofferr
1.89 kristaps 1421: roff_nr(ROFF_ARGS)
1.83 schwarze 1422: {
1.121 schwarze 1423: const char *key;
1424: char *val;
1.138 kristaps 1425: int iv;
1.89 kristaps 1426:
1.121 schwarze 1427: val = *bufp + pos;
1428: key = roff_getname(r, &val, ln, pos);
1.89 kristaps 1429:
1.180 schwarze 1430: iv = mandoc_strntoi(val, strlen(val), 10);
1431:
1.181 schwarze 1432: roff_setreg(r, key, iv);
1.109 kristaps 1433:
1.122 schwarze 1434: return(ROFF_IGN);
1435: }
1436:
1437: /* ARGSUSED */
1438: static enum rofferr
1439: roff_rm(ROFF_ARGS)
1440: {
1441: const char *name;
1442: char *cp;
1443:
1444: cp = *bufp + pos;
1445: while ('\0' != *cp) {
1.127 kristaps 1446: name = roff_getname(r, &cp, ln, (int)(cp - *bufp));
1.122 schwarze 1447: if ('\0' != *name)
1448: roff_setstr(r, name, NULL, 0);
1449: }
1.178 schwarze 1450: return(ROFF_IGN);
1451: }
1452:
1453: /* ARGSUSED */
1454: static enum rofferr
1455: roff_it(ROFF_ARGS)
1456: {
1457: char *cp;
1458: size_t len;
1459: int iv;
1460:
1461: /* Parse the number of lines. */
1462: cp = *bufp + pos;
1463: len = strcspn(cp, " \t");
1464: cp[len] = '\0';
1465: if ((iv = mandoc_strntoi(cp, len, 10)) <= 0) {
1466: mandoc_msg(MANDOCERR_NUMERIC, r->parse,
1467: ln, ppos, *bufp + 1);
1468: return(ROFF_IGN);
1469: }
1470: cp += len + 1;
1471:
1472: /* Arm the input line trap. */
1473: roffit_lines = iv;
1474: roffit_macro = mandoc_strdup(cp);
1.109 kristaps 1475: return(ROFF_IGN);
1.175 schwarze 1476: }
1477:
1478: /* ARGSUSED */
1479: static enum rofferr
1480: roff_Dd(ROFF_ARGS)
1481: {
1482: const char *const *cp;
1483:
1484: if (MPARSE_MDOC != r->parsetype)
1485: for (cp = __mdoc_reserved; *cp; cp++)
1486: roff_setstr(r, *cp, NULL, 0);
1487:
1488: return(ROFF_CONT);
1489: }
1490:
1491: /* ARGSUSED */
1492: static enum rofferr
1493: roff_TH(ROFF_ARGS)
1494: {
1495: const char *const *cp;
1496:
1497: if (MPARSE_MDOC != r->parsetype)
1498: for (cp = __man_reserved; *cp; cp++)
1499: roff_setstr(r, *cp, NULL, 0);
1500:
1501: return(ROFF_CONT);
1.109 kristaps 1502: }
1503:
1504: /* ARGSUSED */
1505: static enum rofferr
1506: roff_TE(ROFF_ARGS)
1507: {
1508:
1509: if (NULL == r->tbl)
1.128 kristaps 1510: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.115 kristaps 1511: else
1.151 kristaps 1512: tbl_end(&r->tbl);
1.109 kristaps 1513:
1.112 kristaps 1514: return(ROFF_IGN);
1515: }
1516:
1517: /* ARGSUSED */
1518: static enum rofferr
1519: roff_T_(ROFF_ARGS)
1520: {
1521:
1522: if (NULL == r->tbl)
1.128 kristaps 1523: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.112 kristaps 1524: else
1.116 kristaps 1525: tbl_restart(ppos, ln, r->tbl);
1.112 kristaps 1526:
1.109 kristaps 1527: return(ROFF_IGN);
1528: }
1529:
1.156 kristaps 1530: #if 0
1531: static int
1.151 kristaps 1532: roff_closeeqn(struct roff *r)
1533: {
1534:
1535: return(r->eqn && ROFF_EQN == eqn_end(&r->eqn) ? 1 : 0);
1536: }
1.156 kristaps 1537: #endif
1.151 kristaps 1538:
1.156 kristaps 1539: static void
1.151 kristaps 1540: roff_openeqn(struct roff *r, const char *name, int line,
1541: int offs, const char *buf)
1.125 kristaps 1542: {
1.151 kristaps 1543: struct eqn_node *e;
1544: int poff;
1.125 kristaps 1545:
1546: assert(NULL == r->eqn);
1.151 kristaps 1547: e = eqn_alloc(name, offs, line, r->parse);
1.125 kristaps 1548:
1549: if (r->last_eqn)
1550: r->last_eqn->next = e;
1551: else
1552: r->first_eqn = r->last_eqn = e;
1553:
1554: r->eqn = r->last_eqn = e;
1.151 kristaps 1555:
1556: if (buf) {
1557: poff = 0;
1558: eqn_read(&r->eqn, line, buf, offs, &poff);
1559: }
1560: }
1561:
1562: /* ARGSUSED */
1563: static enum rofferr
1564: roff_EQ(ROFF_ARGS)
1565: {
1566:
1567: roff_openeqn(r, *bufp + pos, ln, ppos, NULL);
1.125 kristaps 1568: return(ROFF_IGN);
1569: }
1570:
1571: /* ARGSUSED */
1572: static enum rofferr
1573: roff_EN(ROFF_ARGS)
1574: {
1575:
1.128 kristaps 1576: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.125 kristaps 1577: return(ROFF_IGN);
1578: }
1579:
1580: /* ARGSUSED */
1581: static enum rofferr
1.109 kristaps 1582: roff_TS(ROFF_ARGS)
1583: {
1.176 schwarze 1584: struct tbl_node *tbl;
1.89 kristaps 1585:
1.115 kristaps 1586: if (r->tbl) {
1.128 kristaps 1587: mandoc_msg(MANDOCERR_SCOPEBROKEN, r->parse, ln, ppos, NULL);
1.151 kristaps 1588: tbl_end(&r->tbl);
1.115 kristaps 1589: }
1.83 schwarze 1590:
1.176 schwarze 1591: tbl = tbl_alloc(ppos, ln, r->parse);
1.113 kristaps 1592:
1593: if (r->last_tbl)
1.176 schwarze 1594: r->last_tbl->next = tbl;
1.113 kristaps 1595: else
1.176 schwarze 1596: r->first_tbl = r->last_tbl = tbl;
1.113 kristaps 1597:
1.176 schwarze 1598: r->tbl = r->last_tbl = tbl;
1.83 schwarze 1599: return(ROFF_IGN);
1.92 schwarze 1600: }
1601:
1.105 kristaps 1602: /* ARGSUSED */
1603: static enum rofferr
1.174 kristaps 1604: roff_cc(ROFF_ARGS)
1605: {
1606: const char *p;
1607:
1608: p = *bufp + pos;
1609:
1610: if ('\0' == *p || '.' == (r->control = *p++))
1611: r->control = 0;
1612:
1613: if ('\0' != *p)
1614: mandoc_msg(MANDOCERR_ARGCOUNT, r->parse, ln, ppos, NULL);
1615:
1616: return(ROFF_IGN);
1617: }
1618:
1619: /* ARGSUSED */
1620: static enum rofferr
1.164 kristaps 1621: roff_tr(ROFF_ARGS)
1622: {
1623: const char *p, *first, *second;
1624: size_t fsz, ssz;
1625: enum mandoc_esc esc;
1626:
1627: p = *bufp + pos;
1628:
1629: if ('\0' == *p) {
1630: mandoc_msg(MANDOCERR_ARGCOUNT, r->parse, ln, ppos, NULL);
1631: return(ROFF_IGN);
1632: }
1633:
1634: while ('\0' != *p) {
1635: fsz = ssz = 1;
1636:
1637: first = p++;
1638: if ('\\' == *first) {
1639: esc = mandoc_escape(&p, NULL, NULL);
1640: if (ESCAPE_ERROR == esc) {
1641: mandoc_msg
1642: (MANDOCERR_BADESCAPE, r->parse,
1643: ln, (int)(p - *bufp), NULL);
1644: return(ROFF_IGN);
1645: }
1646: fsz = (size_t)(p - first);
1647: }
1648:
1649: second = p++;
1650: if ('\\' == *second) {
1651: esc = mandoc_escape(&p, NULL, NULL);
1652: if (ESCAPE_ERROR == esc) {
1653: mandoc_msg
1654: (MANDOCERR_BADESCAPE, r->parse,
1655: ln, (int)(p - *bufp), NULL);
1656: return(ROFF_IGN);
1657: }
1658: ssz = (size_t)(p - second);
1.165 kristaps 1659: } else if ('\0' == *second) {
1.164 kristaps 1660: mandoc_msg(MANDOCERR_ARGCOUNT, r->parse,
1661: ln, (int)(p - *bufp), NULL);
1662: second = " ";
1.165 kristaps 1663: p--;
1.164 kristaps 1664: }
1665:
1.167 kristaps 1666: if (fsz > 1) {
1667: roff_setstrn(&r->xmbtab, first,
1668: fsz, second, ssz, 0);
1669: continue;
1670: }
1671:
1672: if (NULL == r->xtab)
1673: r->xtab = mandoc_calloc
1674: (128, sizeof(struct roffstr));
1675:
1676: free(r->xtab[(int)*first].p);
1677: r->xtab[(int)*first].p = mandoc_strndup(second, ssz);
1678: r->xtab[(int)*first].sz = ssz;
1.164 kristaps 1679: }
1680:
1681: return(ROFF_IGN);
1682: }
1683:
1684: /* ARGSUSED */
1685: static enum rofferr
1.105 kristaps 1686: roff_so(ROFF_ARGS)
1687: {
1688: char *name;
1689:
1.128 kristaps 1690: mandoc_msg(MANDOCERR_SO, r->parse, ln, ppos, NULL);
1.105 kristaps 1691:
1692: /*
1693: * Handle `so'. Be EXTREMELY careful, as we shouldn't be
1694: * opening anything that's not in our cwd or anything beneath
1695: * it. Thus, explicitly disallow traversing up the file-system
1696: * or using absolute paths.
1697: */
1698:
1699: name = *bufp + pos;
1700: if ('/' == *name || strstr(name, "../") || strstr(name, "/..")) {
1.128 kristaps 1701: mandoc_msg(MANDOCERR_SOPATH, r->parse, ln, pos, NULL);
1.105 kristaps 1702: return(ROFF_ERR);
1703: }
1704:
1705: *offs = pos;
1706: return(ROFF_SO);
1707: }
1.92 schwarze 1708:
1.106 kristaps 1709: /* ARGSUSED */
1710: static enum rofferr
1711: roff_userdef(ROFF_ARGS)
1.99 kristaps 1712: {
1.106 kristaps 1713: const char *arg[9];
1714: char *cp, *n1, *n2;
1.119 schwarze 1715: int i;
1.106 kristaps 1716:
1717: /*
1718: * Collect pointers to macro argument strings
1719: * and null-terminate them.
1720: */
1721: cp = *bufp + pos;
1.119 schwarze 1722: for (i = 0; i < 9; i++)
1.120 schwarze 1723: arg[i] = '\0' == *cp ? "" :
1.136 kristaps 1724: mandoc_getarg(r->parse, &cp, ln, &pos);
1.99 kristaps 1725:
1.106 kristaps 1726: /*
1727: * Expand macro arguments.
1.99 kristaps 1728: */
1.106 kristaps 1729: *szp = 0;
1730: n1 = cp = mandoc_strdup(r->current_string);
1731: while (NULL != (cp = strstr(cp, "\\$"))) {
1732: i = cp[2] - '1';
1733: if (0 > i || 8 < i) {
1734: /* Not an argument invocation. */
1735: cp += 2;
1736: continue;
1737: }
1738:
1739: *szp = strlen(n1) - 3 + strlen(arg[i]) + 1;
1740: n2 = mandoc_malloc(*szp);
1741:
1742: strlcpy(n2, n1, (size_t)(cp - n1 + 1));
1743: strlcat(n2, arg[i], *szp);
1744: strlcat(n2, cp + 3, *szp);
1745:
1746: cp = n2 + (cp - n1);
1747: free(n1);
1748: n1 = n2;
1.99 kristaps 1749: }
1750:
1.106 kristaps 1751: /*
1752: * Replace the macro invocation
1753: * by the expanded macro.
1754: */
1755: free(*bufp);
1756: *bufp = n1;
1757: if (0 == *szp)
1758: *szp = strlen(*bufp) + 1;
1759:
1760: return(*szp > 1 && '\n' == (*bufp)[(int)*szp - 2] ?
1761: ROFF_REPARSE : ROFF_APPEND);
1.99 kristaps 1762: }
1.121 schwarze 1763:
1764: static char *
1765: roff_getname(struct roff *r, char **cpp, int ln, int pos)
1766: {
1767: char *name, *cp;
1768:
1769: name = *cpp;
1770: if ('\0' == *name)
1771: return(name);
1772:
1773: /* Read until end of name. */
1774: for (cp = name; '\0' != *cp && ' ' != *cp; cp++) {
1775: if ('\\' != *cp)
1776: continue;
1777: cp++;
1778: if ('\\' == *cp)
1779: continue;
1.128 kristaps 1780: mandoc_msg(MANDOCERR_NAMESC, r->parse, ln, pos, NULL);
1.121 schwarze 1781: *cp = '\0';
1782: name = cp;
1783: }
1784:
1785: /* Nil-terminate name. */
1786: if ('\0' != *cp)
1787: *(cp++) = '\0';
1788:
1789: /* Read past spaces. */
1790: while (' ' == *cp)
1791: cp++;
1792:
1793: *cpp = cp;
1794: return(name);
1795: }
1796:
1.106 kristaps 1797: /*
1798: * Store *string into the user-defined string called *name.
1799: * In multiline mode, append to an existing entry and append '\n';
1800: * else replace the existing entry, if there is one.
1801: * To clear an existing entry, call with (*r, *name, NULL, 0).
1802: */
1.94 kristaps 1803: static void
1.106 kristaps 1804: roff_setstr(struct roff *r, const char *name, const char *string,
1805: int multiline)
1.92 schwarze 1806: {
1.164 kristaps 1807:
1808: roff_setstrn(&r->strtab, name, strlen(name), string,
1809: string ? strlen(string) : 0, multiline);
1810: }
1811:
1812: static void
1.166 kristaps 1813: roff_setstrn(struct roffkv **r, const char *name, size_t namesz,
1.164 kristaps 1814: const char *string, size_t stringsz, int multiline)
1815: {
1.166 kristaps 1816: struct roffkv *n;
1.164 kristaps 1817: char *c;
1818: int i;
1819: size_t oldch, newch;
1.92 schwarze 1820:
1.106 kristaps 1821: /* Search for an existing string with the same name. */
1.164 kristaps 1822: n = *r;
1823:
1.166 kristaps 1824: while (n && strcmp(name, n->key.p))
1.92 schwarze 1825: n = n->next;
1.94 kristaps 1826:
1827: if (NULL == n) {
1.106 kristaps 1828: /* Create a new string table entry. */
1.166 kristaps 1829: n = mandoc_malloc(sizeof(struct roffkv));
1830: n->key.p = mandoc_strndup(name, namesz);
1831: n->key.sz = namesz;
1832: n->val.p = NULL;
1833: n->val.sz = 0;
1.164 kristaps 1834: n->next = *r;
1835: *r = n;
1.106 kristaps 1836: } else if (0 == multiline) {
1837: /* In multiline mode, append; else replace. */
1.166 kristaps 1838: free(n->val.p);
1839: n->val.p = NULL;
1840: n->val.sz = 0;
1.106 kristaps 1841: }
1842:
1843: if (NULL == string)
1844: return;
1845:
1846: /*
1847: * One additional byte for the '\n' in multiline mode,
1848: * and one for the terminating '\0'.
1849: */
1.164 kristaps 1850: newch = stringsz + (multiline ? 2u : 1u);
1851:
1.166 kristaps 1852: if (NULL == n->val.p) {
1853: n->val.p = mandoc_malloc(newch);
1854: *n->val.p = '\0';
1.106 kristaps 1855: oldch = 0;
1856: } else {
1.166 kristaps 1857: oldch = n->val.sz;
1858: n->val.p = mandoc_realloc(n->val.p, oldch + newch);
1.106 kristaps 1859: }
1860:
1861: /* Skip existing content in the destination buffer. */
1.166 kristaps 1862: c = n->val.p + (int)oldch;
1.106 kristaps 1863:
1864: /* Append new content to the destination buffer. */
1.164 kristaps 1865: i = 0;
1866: while (i < (int)stringsz) {
1.106 kristaps 1867: /*
1868: * Rudimentary roff copy mode:
1869: * Handle escaped backslashes.
1870: */
1.164 kristaps 1871: if ('\\' == string[i] && '\\' == string[i + 1])
1872: i++;
1873: *c++ = string[i++];
1.106 kristaps 1874: }
1.94 kristaps 1875:
1.106 kristaps 1876: /* Append terminating bytes. */
1877: if (multiline)
1878: *c++ = '\n';
1.163 kristaps 1879:
1.106 kristaps 1880: *c = '\0';
1.166 kristaps 1881: n->val.sz = (int)(c - n->val.p);
1.92 schwarze 1882: }
1883:
1.94 kristaps 1884: static const char *
1885: roff_getstrn(const struct roff *r, const char *name, size_t len)
1.92 schwarze 1886: {
1.166 kristaps 1887: const struct roffkv *n;
1.92 schwarze 1888:
1.164 kristaps 1889: for (n = r->strtab; n; n = n->next)
1.166 kristaps 1890: if (0 == strncmp(name, n->key.p, len) &&
1891: '\0' == n->key.p[(int)len])
1892: return(n->val.p);
1.94 kristaps 1893:
1.157 kristaps 1894: return(NULL);
1.92 schwarze 1895: }
1896:
1.94 kristaps 1897: static void
1.167 kristaps 1898: roff_freestr(struct roffkv *r)
1.92 schwarze 1899: {
1.166 kristaps 1900: struct roffkv *n, *nn;
1.92 schwarze 1901:
1.167 kristaps 1902: for (n = r; n; n = nn) {
1.166 kristaps 1903: free(n->key.p);
1904: free(n->val.p);
1.92 schwarze 1905: nn = n->next;
1906: free(n);
1907: }
1.114 kristaps 1908: }
1909:
1910: const struct tbl_span *
1911: roff_span(const struct roff *r)
1912: {
1913:
1914: return(r->tbl ? tbl_span(r->tbl) : NULL);
1.125 kristaps 1915: }
1916:
1917: const struct eqn *
1918: roff_eqn(const struct roff *r)
1919: {
1920:
1921: return(r->last_eqn ? &r->last_eqn->eqn : NULL);
1.164 kristaps 1922: }
1923:
1924: /*
1925: * Duplicate an input string, making the appropriate character
1926: * conversations (as stipulated by `tr') along the way.
1927: * Returns a heap-allocated string with all the replacements made.
1928: */
1929: char *
1930: roff_strdup(const struct roff *r, const char *p)
1931: {
1.166 kristaps 1932: const struct roffkv *cp;
1.164 kristaps 1933: char *res;
1934: const char *pp;
1935: size_t ssz, sz;
1936: enum mandoc_esc esc;
1937:
1.167 kristaps 1938: if (NULL == r->xmbtab && NULL == r->xtab)
1.164 kristaps 1939: return(mandoc_strdup(p));
1940: else if ('\0' == *p)
1941: return(mandoc_strdup(""));
1942:
1943: /*
1944: * Step through each character looking for term matches
1945: * (remember that a `tr' can be invoked with an escape, which is
1946: * a glyph but the escape is multi-character).
1947: * We only do this if the character hash has been initialised
1948: * and the string is >0 length.
1949: */
1950:
1951: res = NULL;
1952: ssz = 0;
1953:
1954: while ('\0' != *p) {
1.167 kristaps 1955: if ('\\' != *p && r->xtab && r->xtab[(int)*p].p) {
1956: sz = r->xtab[(int)*p].sz;
1957: res = mandoc_realloc(res, ssz + sz + 1);
1958: memcpy(res + ssz, r->xtab[(int)*p].p, sz);
1959: ssz += sz;
1960: p++;
1961: continue;
1962: } else if ('\\' != *p) {
1963: res = mandoc_realloc(res, ssz + 2);
1964: res[ssz++] = *p++;
1965: continue;
1966: }
1967:
1.164 kristaps 1968: /* Search for term matches. */
1.167 kristaps 1969: for (cp = r->xmbtab; cp; cp = cp->next)
1.166 kristaps 1970: if (0 == strncmp(p, cp->key.p, cp->key.sz))
1.164 kristaps 1971: break;
1972:
1973: if (NULL != cp) {
1974: /*
1975: * A match has been found.
1976: * Append the match to the array and move
1977: * forward by its keysize.
1978: */
1.166 kristaps 1979: res = mandoc_realloc
1980: (res, ssz + cp->val.sz + 1);
1981: memcpy(res + ssz, cp->val.p, cp->val.sz);
1982: ssz += cp->val.sz;
1983: p += (int)cp->key.sz;
1.164 kristaps 1984: continue;
1985: }
1986:
1.167 kristaps 1987: /*
1988: * Handle escapes carefully: we need to copy
1989: * over just the escape itself, or else we might
1990: * do replacements within the escape itself.
1991: * Make sure to pass along the bogus string.
1992: */
1993: pp = p++;
1994: esc = mandoc_escape(&p, NULL, NULL);
1995: if (ESCAPE_ERROR == esc) {
1996: sz = strlen(pp);
1.164 kristaps 1997: res = mandoc_realloc(res, ssz + sz + 1);
1998: memcpy(res + ssz, pp, sz);
1.167 kristaps 1999: break;
1.164 kristaps 2000: }
1.167 kristaps 2001: /*
2002: * We bail out on bad escapes.
2003: * No need to warn: we already did so when
2004: * roff_res() was called.
2005: */
2006: sz = (int)(p - pp);
2007: res = mandoc_realloc(res, ssz + sz + 1);
2008: memcpy(res + ssz, pp, sz);
2009: ssz += sz;
1.164 kristaps 2010: }
2011:
2012: res[(int)ssz] = '\0';
2013: return(res);
1.174 kristaps 2014: }
2015:
2016: /*
2017: * Find out whether a line is a macro line or not.
2018: * If it is, adjust the current position and return one; if it isn't,
2019: * return zero and don't change the current position.
2020: * If the control character has been set with `.cc', then let that grain
2021: * precedence.
2022: * This is slighly contrary to groff, where using the non-breaking
2023: * control character when `cc' has been invoked will cause the
2024: * non-breaking macro contents to be printed verbatim.
2025: */
2026: int
2027: roff_getcontrol(const struct roff *r, const char *cp, int *ppos)
2028: {
2029: int pos;
2030:
2031: pos = *ppos;
2032:
2033: if (0 != r->control && cp[pos] == r->control)
2034: pos++;
2035: else if (0 != r->control)
2036: return(0);
2037: else if ('\\' == cp[pos] && '.' == cp[pos + 1])
2038: pos += 2;
2039: else if ('.' == cp[pos] || '\'' == cp[pos])
2040: pos++;
2041: else
2042: return(0);
2043:
2044: while (' ' == cp[pos] || '\t' == cp[pos])
2045: pos++;
2046:
2047: *ppos = pos;
2048: return(1);
1.74 kristaps 2049: }
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