Annotation of mandoc/roff.c, Revision 1.176
1.176 ! schwarze 1: /* $Id: roff.c,v 1.175 2012/11/19 17:57:23 schwarze Exp $ */
1.1 kristaps 2: /*
1.175 schwarze 3: * Copyright (c) 2010, 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
1.173 schwarze 4: * Copyright (c) 2010, 2011, 2012 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>
1.1 kristaps 24: #include <stdlib.h>
1.67 kristaps 25: #include <string.h>
1.1 kristaps 26:
1.67 kristaps 27: #include "mandoc.h"
1.109 kristaps 28: #include "libroff.h"
1.94 kristaps 29: #include "libmandoc.h"
1.33 kristaps 30:
1.141 kristaps 31: /* Maximum number of nested if-else conditionals. */
1.82 kristaps 32: #define RSTACK_MAX 128
33:
1.170 schwarze 34: /* Maximum number of string expansions per line, to break infinite loops. */
35: #define EXPAND_LIMIT 1000
36:
1.67 kristaps 37: enum rofft {
1.103 kristaps 38: ROFF_ad,
1.80 kristaps 39: ROFF_am,
40: ROFF_ami,
41: ROFF_am1,
1.174 kristaps 42: ROFF_cc,
1.80 kristaps 43: ROFF_de,
44: ROFF_dei,
45: ROFF_de1,
1.83 schwarze 46: ROFF_ds,
1.82 kristaps 47: ROFF_el,
1.103 kristaps 48: ROFF_hy,
1.82 kristaps 49: ROFF_ie,
1.75 kristaps 50: ROFF_if,
1.76 kristaps 51: ROFF_ig,
1.123 schwarze 52: ROFF_it,
1.103 kristaps 53: ROFF_ne,
54: ROFF_nh,
1.104 kristaps 55: ROFF_nr,
1.124 schwarze 56: ROFF_ns,
57: ROFF_ps,
1.83 schwarze 58: ROFF_rm,
1.105 kristaps 59: ROFF_so,
1.124 schwarze 60: ROFF_ta,
1.83 schwarze 61: ROFF_tr,
1.175 schwarze 62: ROFF_Dd,
63: ROFF_TH,
1.109 kristaps 64: ROFF_TS,
65: ROFF_TE,
1.112 kristaps 66: ROFF_T_,
1.125 kristaps 67: ROFF_EQ,
68: ROFF_EN,
1.76 kristaps 69: ROFF_cblock,
1.141 kristaps 70: ROFF_ccond,
1.106 kristaps 71: ROFF_USERDEF,
1.67 kristaps 72: ROFF_MAX
73: };
74:
1.82 kristaps 75: enum roffrule {
76: ROFFRULE_ALLOW,
77: ROFFRULE_DENY
78: };
79:
1.147 kristaps 80: /*
81: * A single register entity. If "set" is zero, the value of the
82: * register should be the default one, which is per-register.
83: * Registers are assumed to be unsigned ints for now.
84: */
85: struct reg {
1.166 kristaps 86: int set; /* whether set or not */
87: unsigned int u; /* unsigned integer */
1.147 kristaps 88: };
89:
1.167 kristaps 90: /*
91: * An incredibly-simple string buffer.
92: */
1.94 kristaps 93: struct roffstr {
1.167 kristaps 94: char *p; /* nil-terminated buffer */
95: size_t sz; /* saved strlen(p) */
1.166 kristaps 96: };
97:
98: /*
1.167 kristaps 99: * A key-value roffstr pair as part of a singly-linked list.
1.166 kristaps 100: */
101: struct roffkv {
102: struct roffstr key;
103: struct roffstr val;
104: struct roffkv *next; /* next in list */
1.94 kristaps 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 */
1.147 kristaps 114: struct reg regs[REG__MAX];
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 *);
1.167 kristaps 185: static void roff_freestr(struct roffkv *);
1.121 schwarze 186: static char *roff_getname(struct roff *, char **, int, int);
1.94 kristaps 187: static const char *roff_getstrn(const struct roff *,
188: const char *, size_t);
1.103 kristaps 189: static enum rofferr roff_line_ignore(ROFF_ARGS);
1.89 kristaps 190: static enum rofferr roff_nr(ROFF_ARGS);
1.169 schwarze 191: static void roff_openeqn(struct roff *, const char *,
1.156 kristaps 192: int, int, const char *);
1.155 kristaps 193: static enum rofft roff_parse(struct roff *, const char *, int *);
194: static enum rofferr roff_parsetext(char *);
1.172 schwarze 195: static enum rofferr roff_res(struct roff *,
1.142 kristaps 196: char **, size_t *, int, int);
1.122 schwarze 197: static enum rofferr roff_rm(ROFF_ARGS);
1.94 kristaps 198: static void roff_setstr(struct roff *,
1.106 kristaps 199: const char *, const char *, int);
1.166 kristaps 200: static void roff_setstrn(struct roffkv **, const char *,
1.164 kristaps 201: size_t, const char *, size_t, int);
1.105 kristaps 202: static enum rofferr roff_so(ROFF_ARGS);
1.164 kristaps 203: static enum rofferr roff_tr(ROFF_ARGS);
1.175 schwarze 204: static enum rofferr roff_Dd(ROFF_ARGS);
205: static enum rofferr roff_TH(ROFF_ARGS);
1.109 kristaps 206: static enum rofferr roff_TE(ROFF_ARGS);
207: static enum rofferr roff_TS(ROFF_ARGS);
1.125 kristaps 208: static enum rofferr roff_EQ(ROFF_ARGS);
209: static enum rofferr roff_EN(ROFF_ARGS);
1.112 kristaps 210: static enum rofferr roff_T_(ROFF_ARGS);
1.106 kristaps 211: static enum rofferr roff_userdef(ROFF_ARGS);
1.67 kristaps 212:
1.155 kristaps 213: /* See roffhash_find() */
1.85 kristaps 214:
215: #define ASCII_HI 126
216: #define ASCII_LO 33
217: #define HASHWIDTH (ASCII_HI - ASCII_LO + 1)
218:
219: static struct roffmac *hash[HASHWIDTH];
220:
221: static struct roffmac roffs[ROFF_MAX] = {
1.103 kristaps 222: { "ad", roff_line_ignore, NULL, NULL, 0, NULL },
1.85 kristaps 223: { "am", roff_block, roff_block_text, roff_block_sub, 0, NULL },
224: { "ami", roff_block, roff_block_text, roff_block_sub, 0, NULL },
225: { "am1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.174 kristaps 226: { "cc", roff_cc, NULL, NULL, 0, NULL },
1.85 kristaps 227: { "de", roff_block, roff_block_text, roff_block_sub, 0, NULL },
228: { "dei", roff_block, roff_block_text, roff_block_sub, 0, NULL },
229: { "de1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.92 schwarze 230: { "ds", roff_ds, NULL, NULL, 0, NULL },
1.85 kristaps 231: { "el", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
1.103 kristaps 232: { "hy", roff_line_ignore, NULL, NULL, 0, NULL },
1.85 kristaps 233: { "ie", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
234: { "if", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
235: { "ig", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.123 schwarze 236: { "it", roff_line_ignore, NULL, NULL, 0, NULL },
1.103 kristaps 237: { "ne", roff_line_ignore, NULL, NULL, 0, NULL },
238: { "nh", roff_line_ignore, NULL, NULL, 0, NULL },
1.104 kristaps 239: { "nr", roff_nr, NULL, NULL, 0, NULL },
1.124 schwarze 240: { "ns", roff_line_ignore, NULL, NULL, 0, NULL },
241: { "ps", roff_line_ignore, NULL, NULL, 0, NULL },
1.122 schwarze 242: { "rm", roff_rm, NULL, NULL, 0, NULL },
1.105 kristaps 243: { "so", roff_so, NULL, NULL, 0, NULL },
1.124 schwarze 244: { "ta", roff_line_ignore, NULL, NULL, 0, NULL },
1.164 kristaps 245: { "tr", roff_tr, NULL, NULL, 0, NULL },
1.175 schwarze 246: { "Dd", roff_Dd, NULL, NULL, 0, NULL },
247: { "TH", roff_TH, NULL, NULL, 0, NULL },
1.109 kristaps 248: { "TS", roff_TS, NULL, NULL, 0, NULL },
249: { "TE", roff_TE, NULL, NULL, 0, NULL },
1.112 kristaps 250: { "T&", roff_T_, NULL, NULL, 0, NULL },
1.125 kristaps 251: { "EQ", roff_EQ, NULL, NULL, 0, NULL },
252: { "EN", roff_EN, NULL, NULL, 0, NULL },
1.85 kristaps 253: { ".", roff_cblock, NULL, NULL, 0, NULL },
254: { "\\}", roff_ccond, NULL, NULL, 0, NULL },
1.106 kristaps 255: { NULL, roff_userdef, NULL, NULL, 0, NULL },
1.67 kristaps 256: };
257:
1.175 schwarze 258: const char *const __mdoc_reserved[] = {
259: "Ac", "Ad", "An", "Ao", "Ap", "Aq", "Ar", "At",
260: "Bc", "Bd", "Bf", "Bk", "Bl", "Bo", "Bq",
261: "Brc", "Bro", "Brq", "Bsx", "Bt", "Bx",
262: "Cd", "Cm", "Db", "Dc", "Dd", "Dl", "Do", "Dq",
263: "Ds", "Dt", "Dv", "Dx", "D1",
264: "Ec", "Ed", "Ef", "Ek", "El", "Em", "em",
265: "En", "Eo", "Eq", "Er", "Es", "Ev", "Ex",
266: "Fa", "Fc", "Fd", "Fl", "Fn", "Fo", "Fr", "Ft", "Fx",
267: "Hf", "Ic", "In", "It", "Lb", "Li", "Lk", "Lp", "LP",
268: "Me", "Ms", "Mt", "Nd", "Nm", "No", "Ns", "Nx",
269: "Oc", "Oo", "Op", "Os", "Ot", "Ox",
270: "Pa", "Pc", "Pf", "Po", "Pp", "PP", "pp", "Pq",
271: "Qc", "Ql", "Qo", "Qq", "Or", "Rd", "Re", "Rs", "Rv",
272: "Sc", "Sf", "Sh", "SH", "Sm", "So", "Sq",
273: "Ss", "St", "Sx", "Sy",
274: "Ta", "Tn", "Ud", "Ux", "Va", "Vt", "Xc", "Xo", "Xr",
275: "%A", "%B", "%D", "%I", "%J", "%N", "%O",
276: "%P", "%Q", "%R", "%T", "%U", "%V",
277: NULL
278: };
279:
280: const char *const __man_reserved[] = {
281: "AT", "B", "BI", "BR", "BT", "DE", "DS", "DT",
282: "EE", "EN", "EQ", "EX", "HF", "HP", "I", "IB", "IP", "IR",
283: "LP", "ME", "MT", "OP", "P", "PD", "PP", "PT",
284: "R", "RB", "RE", "RI", "RS", "SB", "SH", "SM", "SS", "SY",
285: "TE", "TH", "TP", "TQ", "TS", "T&", "UC", "UE", "UR", "YS",
286: NULL
287: };
288:
1.141 kristaps 289: /* Array of injected predefined strings. */
290: #define PREDEFS_MAX 38
291: static const struct predef predefs[PREDEFS_MAX] = {
292: #include "predefs.in"
293: };
294:
1.155 kristaps 295: /* See roffhash_find() */
1.85 kristaps 296: #define ROFF_HASH(p) (p[0] - ASCII_LO)
297:
298: static void
1.155 kristaps 299: roffhash_init(void)
1.85 kristaps 300: {
301: struct roffmac *n;
302: int buc, i;
303:
1.106 kristaps 304: for (i = 0; i < (int)ROFF_USERDEF; i++) {
1.85 kristaps 305: assert(roffs[i].name[0] >= ASCII_LO);
306: assert(roffs[i].name[0] <= ASCII_HI);
307:
308: buc = ROFF_HASH(roffs[i].name);
309:
310: if (NULL != (n = hash[buc])) {
311: for ( ; n->next; n = n->next)
312: /* Do nothing. */ ;
313: n->next = &roffs[i];
314: } else
315: hash[buc] = &roffs[i];
316: }
317: }
318:
1.67 kristaps 319: /*
320: * Look up a roff token by its name. Returns ROFF_MAX if no macro by
321: * the nil-terminated string name could be found.
322: */
323: static enum rofft
1.155 kristaps 324: roffhash_find(const char *p, size_t s)
1.67 kristaps 325: {
1.85 kristaps 326: int buc;
327: struct roffmac *n;
1.67 kristaps 328:
1.85 kristaps 329: /*
330: * libroff has an extremely simple hashtable, for the time
331: * being, which simply keys on the first character, which must
332: * be printable, then walks a chain. It works well enough until
333: * optimised.
334: */
335:
336: if (p[0] < ASCII_LO || p[0] > ASCII_HI)
337: return(ROFF_MAX);
338:
339: buc = ROFF_HASH(p);
340:
341: if (NULL == (n = hash[buc]))
342: return(ROFF_MAX);
343: for ( ; n; n = n->next)
1.106 kristaps 344: if (0 == strncmp(n->name, p, s) && '\0' == n->name[(int)s])
1.85 kristaps 345: return((enum rofft)(n - roffs));
1.67 kristaps 346:
347: return(ROFF_MAX);
348: }
349:
350:
351: /*
352: * Pop the current node off of the stack of roff instructions currently
353: * pending.
354: */
355: static void
356: roffnode_pop(struct roff *r)
357: {
358: struct roffnode *p;
359:
1.75 kristaps 360: assert(r->last);
361: p = r->last;
1.82 kristaps 362:
1.75 kristaps 363: r->last = r->last->parent;
1.106 kristaps 364: free(p->name);
365: free(p->end);
1.67 kristaps 366: free(p);
367: }
368:
369:
370: /*
371: * Push a roff node onto the instruction stack. This must later be
372: * removed with roffnode_pop().
373: */
1.98 schwarze 374: static void
1.106 kristaps 375: roffnode_push(struct roff *r, enum rofft tok, const char *name,
376: int line, int col)
1.67 kristaps 377: {
378: struct roffnode *p;
379:
1.98 schwarze 380: p = mandoc_calloc(1, sizeof(struct roffnode));
1.67 kristaps 381: p->tok = tok;
1.106 kristaps 382: if (name)
383: p->name = mandoc_strdup(name);
1.67 kristaps 384: p->parent = r->last;
385: p->line = line;
386: p->col = col;
1.79 kristaps 387: p->rule = p->parent ? p->parent->rule : ROFFRULE_DENY;
1.67 kristaps 388:
389: r->last = p;
390: }
391:
392:
393: static void
394: roff_free1(struct roff *r)
395: {
1.176 ! schwarze 396: struct tbl_node *tbl;
1.125 kristaps 397: struct eqn_node *e;
1.167 kristaps 398: int i;
1.67 kristaps 399:
1.176 ! schwarze 400: while (NULL != (tbl = r->first_tbl)) {
! 401: r->first_tbl = tbl->next;
! 402: tbl_free(tbl);
1.109 kristaps 403: }
404:
1.113 kristaps 405: r->first_tbl = r->last_tbl = r->tbl = NULL;
406:
1.125 kristaps 407: while (NULL != (e = r->first_eqn)) {
408: r->first_eqn = e->next;
409: eqn_free(e);
410: }
411:
412: r->first_eqn = r->last_eqn = r->eqn = NULL;
413:
1.67 kristaps 414: while (r->last)
415: roffnode_pop(r);
1.109 kristaps 416:
1.167 kristaps 417: roff_freestr(r->strtab);
418: roff_freestr(r->xmbtab);
419:
420: r->strtab = r->xmbtab = NULL;
421:
422: if (r->xtab)
423: for (i = 0; i < 128; i++)
424: free(r->xtab[i].p);
425:
426: free(r->xtab);
427: r->xtab = NULL;
1.67 kristaps 428: }
429:
430: void
431: roff_reset(struct roff *r)
432: {
1.143 kristaps 433: int i;
1.67 kristaps 434:
435: roff_free1(r);
1.143 kristaps 436:
1.174 kristaps 437: r->control = 0;
1.147 kristaps 438: memset(&r->regs, 0, sizeof(struct reg) * REG__MAX);
439:
1.143 kristaps 440: for (i = 0; i < PREDEFS_MAX; i++)
441: roff_setstr(r, predefs[i].name, predefs[i].str, 0);
1.67 kristaps 442: }
443:
444:
445: void
446: roff_free(struct roff *r)
447: {
448:
449: roff_free1(r);
450: free(r);
451: }
452:
453:
454: struct roff *
1.175 schwarze 455: roff_alloc(enum mparset type, struct mparse *parse)
1.67 kristaps 456: {
457: struct roff *r;
1.141 kristaps 458: int i;
1.67 kristaps 459:
1.98 schwarze 460: r = mandoc_calloc(1, sizeof(struct roff));
1.175 schwarze 461: r->parsetype = type;
1.128 kristaps 462: r->parse = parse;
1.82 kristaps 463: r->rstackpos = -1;
1.85 kristaps 464:
1.155 kristaps 465: roffhash_init();
1.141 kristaps 466:
467: for (i = 0; i < PREDEFS_MAX; i++)
468: roff_setstr(r, predefs[i].name, predefs[i].str, 0);
469:
1.67 kristaps 470: return(r);
471: }
472:
1.94 kristaps 473: /*
474: * Pre-filter each and every line for reserved words (one beginning with
475: * `\*', e.g., `\*(ab'). These must be handled before the actual line
476: * is processed.
1.153 kristaps 477: * This also checks the syntax of regular escapes.
1.154 kristaps 478: */
1.172 schwarze 479: static enum rofferr
1.142 kristaps 480: roff_res(struct roff *r, char **bufp, size_t *szp, int ln, int pos)
1.94 kristaps 481: {
1.152 kristaps 482: enum mandoc_esc esc;
1.108 schwarze 483: const char *stesc; /* start of an escape sequence ('\\') */
484: const char *stnam; /* start of the name, after "[(*" */
485: const char *cp; /* end of the name, e.g. before ']' */
486: const char *res; /* the string to be substituted */
1.170 schwarze 487: int i, maxl, expand_count;
1.94 kristaps 488: size_t nsz;
489: char *n;
490:
1.170 schwarze 491: expand_count = 0;
492:
1.154 kristaps 493: again:
1.108 schwarze 494: cp = *bufp + pos;
495: while (NULL != (cp = strchr(cp, '\\'))) {
496: stesc = cp++;
497:
498: /*
499: * The second character must be an asterisk.
500: * If it isn't, skip it anyway: It is escaped,
501: * so it can't start another escape sequence.
502: */
503:
504: if ('\0' == *cp)
1.172 schwarze 505: return(ROFF_CONT);
1.152 kristaps 506:
507: if ('*' != *cp) {
508: res = cp;
509: esc = mandoc_escape(&cp, NULL, NULL);
510: if (ESCAPE_ERROR != esc)
511: continue;
512: cp = res;
1.153 kristaps 513: mandoc_msg
514: (MANDOCERR_BADESCAPE, r->parse,
515: ln, (int)(stesc - *bufp), NULL);
1.172 schwarze 516: return(ROFF_CONT);
1.152 kristaps 517: }
518:
519: cp++;
1.108 schwarze 520:
521: /*
522: * The third character decides the length
523: * of the name of the string.
524: * Save a pointer to the name.
525: */
526:
1.94 kristaps 527: switch (*cp) {
1.108 schwarze 528: case ('\0'):
1.172 schwarze 529: return(ROFF_CONT);
1.94 kristaps 530: case ('('):
531: cp++;
532: maxl = 2;
533: break;
534: case ('['):
535: cp++;
536: maxl = 0;
537: break;
538: default:
539: maxl = 1;
540: break;
541: }
1.108 schwarze 542: stnam = cp;
1.94 kristaps 543:
1.108 schwarze 544: /* Advance to the end of the name. */
1.94 kristaps 545:
546: for (i = 0; 0 == maxl || i < maxl; i++, cp++) {
1.153 kristaps 547: if ('\0' == *cp) {
548: mandoc_msg
549: (MANDOCERR_BADESCAPE,
550: r->parse, ln,
551: (int)(stesc - *bufp), NULL);
1.172 schwarze 552: return(ROFF_CONT);
1.153 kristaps 553: }
1.94 kristaps 554: if (0 == maxl && ']' == *cp)
555: break;
556: }
557:
1.108 schwarze 558: /*
559: * Retrieve the replacement string; if it is
560: * undefined, resume searching for escapes.
561: */
562:
563: res = roff_getstrn(r, stnam, (size_t)i);
1.94 kristaps 564:
565: if (NULL == res) {
1.153 kristaps 566: mandoc_msg
567: (MANDOCERR_BADESCAPE, r->parse,
568: ln, (int)(stesc - *bufp), NULL);
1.142 kristaps 569: res = "";
1.94 kristaps 570: }
571:
1.108 schwarze 572: /* Replace the escape sequence by the string. */
573:
1.161 kristaps 574: pos = stesc - *bufp;
1.154 kristaps 575:
1.94 kristaps 576: nsz = *szp + strlen(res) + 1;
577: n = mandoc_malloc(nsz);
578:
1.108 schwarze 579: strlcpy(n, *bufp, (size_t)(stesc - *bufp + 1));
1.94 kristaps 580: strlcat(n, res, nsz);
581: strlcat(n, cp + (maxl ? 0 : 1), nsz);
582:
583: free(*bufp);
584:
585: *bufp = n;
586: *szp = nsz;
1.170 schwarze 587:
588: if (EXPAND_LIMIT >= ++expand_count)
589: goto again;
590:
591: /* Just leave the string unexpanded. */
592: mandoc_msg(MANDOCERR_ROFFLOOP, r->parse, ln, pos, NULL);
1.172 schwarze 593: return(ROFF_IGN);
1.154 kristaps 594: }
1.172 schwarze 595: return(ROFF_CONT);
1.154 kristaps 596: }
597:
598: /*
599: * Process text streams: convert all breakable hyphens into ASCII_HYPH.
600: */
601: static enum rofferr
602: roff_parsetext(char *p)
603: {
604: size_t sz;
605: const char *start;
606: enum mandoc_esc esc;
607:
608: start = p;
609:
610: while ('\0' != *p) {
611: sz = strcspn(p, "-\\");
612: p += sz;
613:
1.159 kristaps 614: if ('\0' == *p)
615: break;
616:
1.154 kristaps 617: if ('\\' == *p) {
618: /* Skip over escapes. */
619: p++;
620: esc = mandoc_escape
621: ((const char **)&p, NULL, NULL);
622: if (ESCAPE_ERROR == esc)
623: break;
1.155 kristaps 624: continue;
1.159 kristaps 625: } else if (p == start) {
1.158 kristaps 626: p++;
1.155 kristaps 627: continue;
1.158 kristaps 628: }
1.155 kristaps 629:
1.171 schwarze 630: if (isalpha((unsigned char)p[-1]) &&
631: isalpha((unsigned char)p[1]))
1.155 kristaps 632: *p = ASCII_HYPH;
633: p++;
1.94 kristaps 634: }
635:
1.154 kristaps 636: return(ROFF_CONT);
1.94 kristaps 637: }
638:
1.67 kristaps 639: enum rofferr
1.90 kristaps 640: roff_parseln(struct roff *r, int ln, char **bufp,
641: size_t *szp, int pos, int *offs)
1.67 kristaps 642: {
643: enum rofft t;
1.109 kristaps 644: enum rofferr e;
1.130 kristaps 645: int ppos, ctl;
1.79 kristaps 646:
647: /*
1.94 kristaps 648: * Run the reserved-word filter only if we have some reserved
649: * words to fill in.
650: */
651:
1.172 schwarze 652: e = roff_res(r, bufp, szp, ln, pos);
653: if (ROFF_IGN == e)
654: return(e);
655: assert(ROFF_CONT == e);
1.94 kristaps 656:
1.130 kristaps 657: ppos = pos;
1.174 kristaps 658: ctl = roff_getcontrol(r, *bufp, &pos);
1.130 kristaps 659:
1.94 kristaps 660: /*
1.79 kristaps 661: * First, if a scope is open and we're not a macro, pass the
662: * text through the macro's filter. If a scope isn't open and
663: * we're not a macro, just let it through.
1.125 kristaps 664: * Finally, if there's an equation scope open, divert it into it
665: * no matter our state.
1.79 kristaps 666: */
1.74 kristaps 667:
1.130 kristaps 668: if (r->last && ! ctl) {
1.78 kristaps 669: t = r->last->tok;
670: assert(roffs[t].text);
1.109 kristaps 671: e = (*roffs[t].text)
672: (r, t, bufp, szp, ln, pos, pos, offs);
673: assert(ROFF_IGN == e || ROFF_CONT == e);
1.125 kristaps 674: if (ROFF_CONT != e)
675: return(e);
676: if (r->eqn)
1.146 kristaps 677: return(eqn_read(&r->eqn, ln, *bufp, pos, offs));
1.125 kristaps 678: if (r->tbl)
1.130 kristaps 679: return(tbl_read(r->tbl, ln, *bufp, pos));
1.154 kristaps 680: return(roff_parsetext(*bufp + pos));
1.130 kristaps 681: } else if ( ! ctl) {
1.125 kristaps 682: if (r->eqn)
1.146 kristaps 683: return(eqn_read(&r->eqn, ln, *bufp, pos, offs));
1.109 kristaps 684: if (r->tbl)
1.130 kristaps 685: return(tbl_read(r->tbl, ln, *bufp, pos));
1.154 kristaps 686: return(roff_parsetext(*bufp + pos));
1.125 kristaps 687: } else if (r->eqn)
1.146 kristaps 688: return(eqn_read(&r->eqn, ln, *bufp, ppos, offs));
1.67 kristaps 689:
1.79 kristaps 690: /*
691: * If a scope is open, go to the child handler for that macro,
692: * as it may want to preprocess before doing anything with it.
1.125 kristaps 693: * Don't do so if an equation is open.
1.79 kristaps 694: */
1.78 kristaps 695:
1.79 kristaps 696: if (r->last) {
697: t = r->last->tok;
698: assert(roffs[t].sub);
699: return((*roffs[t].sub)
1.90 kristaps 700: (r, t, bufp, szp,
1.130 kristaps 701: ln, ppos, pos, offs));
1.79 kristaps 702: }
1.78 kristaps 703:
1.79 kristaps 704: /*
705: * Lastly, as we've no scope open, try to look up and execute
706: * the new macro. If no macro is found, simply return and let
707: * the compilers handle it.
708: */
1.67 kristaps 709:
1.106 kristaps 710: if (ROFF_MAX == (t = roff_parse(r, *bufp, &pos)))
1.79 kristaps 711: return(ROFF_CONT);
1.67 kristaps 712:
1.75 kristaps 713: assert(roffs[t].proc);
1.78 kristaps 714: return((*roffs[t].proc)
1.90 kristaps 715: (r, t, bufp, szp,
716: ln, ppos, pos, offs));
1.74 kristaps 717: }
718:
719:
1.117 kristaps 720: void
1.74 kristaps 721: roff_endparse(struct roff *r)
722: {
723:
1.110 kristaps 724: if (r->last)
1.128 kristaps 725: mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse,
1.109 kristaps 726: r->last->line, r->last->col, NULL);
1.117 kristaps 727:
1.125 kristaps 728: if (r->eqn) {
1.128 kristaps 729: mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse,
1.148 kristaps 730: r->eqn->eqn.ln, r->eqn->eqn.pos, NULL);
1.151 kristaps 731: eqn_end(&r->eqn);
1.125 kristaps 732: }
733:
1.117 kristaps 734: if (r->tbl) {
1.128 kristaps 735: mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse,
1.117 kristaps 736: r->tbl->line, r->tbl->pos, NULL);
1.151 kristaps 737: tbl_end(&r->tbl);
1.117 kristaps 738: }
1.67 kristaps 739: }
740:
741: /*
742: * Parse a roff node's type from the input buffer. This must be in the
743: * form of ".foo xxx" in the usual way.
744: */
745: static enum rofft
1.106 kristaps 746: roff_parse(struct roff *r, const char *buf, int *pos)
1.67 kristaps 747: {
1.106 kristaps 748: const char *mac;
749: size_t maclen;
1.67 kristaps 750: enum rofft t;
751:
1.144 kristaps 752: if ('\0' == buf[*pos] || '"' == buf[*pos] ||
753: '\t' == buf[*pos] || ' ' == buf[*pos])
1.67 kristaps 754: return(ROFF_MAX);
755:
1.144 kristaps 756: /*
757: * We stop the macro parse at an escape, tab, space, or nil.
758: * However, `\}' is also a valid macro, so make sure we don't
759: * clobber it by seeing the `\' as the end of token.
760: */
761:
1.106 kristaps 762: mac = buf + *pos;
1.144 kristaps 763: maclen = strcspn(mac + 1, " \\\t\0") + 1;
1.67 kristaps 764:
1.106 kristaps 765: t = (r->current_string = roff_getstrn(r, mac, maclen))
1.155 kristaps 766: ? ROFF_USERDEF : roffhash_find(mac, maclen);
1.67 kristaps 767:
1.127 kristaps 768: *pos += (int)maclen;
1.130 kristaps 769:
1.67 kristaps 770: while (buf[*pos] && ' ' == buf[*pos])
771: (*pos)++;
772:
773: return(t);
774: }
775:
776: /* ARGSUSED */
777: static enum rofferr
1.76 kristaps 778: roff_cblock(ROFF_ARGS)
1.67 kristaps 779: {
780:
1.79 kristaps 781: /*
782: * A block-close `..' should only be invoked as a child of an
783: * ignore macro, otherwise raise a warning and just ignore it.
784: */
785:
1.76 kristaps 786: if (NULL == r->last) {
1.128 kristaps 787: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.76 kristaps 788: return(ROFF_IGN);
789: }
1.67 kristaps 790:
1.81 kristaps 791: switch (r->last->tok) {
792: case (ROFF_am):
793: /* FALLTHROUGH */
794: case (ROFF_ami):
795: /* FALLTHROUGH */
796: case (ROFF_am1):
797: /* FALLTHROUGH */
798: case (ROFF_de):
1.108 schwarze 799: /* ROFF_de1 is remapped to ROFF_de in roff_block(). */
1.81 kristaps 800: /* FALLTHROUGH */
801: case (ROFF_dei):
802: /* FALLTHROUGH */
803: case (ROFF_ig):
804: break;
805: default:
1.128 kristaps 806: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.67 kristaps 807: return(ROFF_IGN);
1.76 kristaps 808: }
1.67 kristaps 809:
1.76 kristaps 810: if ((*bufp)[pos])
1.128 kristaps 811: mandoc_msg(MANDOCERR_ARGSLOST, r->parse, ln, pos, NULL);
1.71 kristaps 812:
813: roffnode_pop(r);
1.76 kristaps 814: roffnode_cleanscope(r);
815: return(ROFF_IGN);
1.71 kristaps 816:
1.67 kristaps 817: }
818:
819:
1.76 kristaps 820: static void
821: roffnode_cleanscope(struct roff *r)
1.67 kristaps 822: {
823:
1.76 kristaps 824: while (r->last) {
1.173 schwarze 825: if (--r->last->endspan != 0)
1.76 kristaps 826: break;
827: roffnode_pop(r);
828: }
1.67 kristaps 829: }
830:
831:
1.75 kristaps 832: /* ARGSUSED */
1.74 kristaps 833: static enum rofferr
1.75 kristaps 834: roff_ccond(ROFF_ARGS)
1.74 kristaps 835: {
836:
1.76 kristaps 837: if (NULL == r->last) {
1.128 kristaps 838: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.76 kristaps 839: return(ROFF_IGN);
840: }
841:
1.82 kristaps 842: switch (r->last->tok) {
843: case (ROFF_el):
844: /* FALLTHROUGH */
845: case (ROFF_ie):
846: /* FALLTHROUGH */
847: case (ROFF_if):
848: break;
849: default:
1.128 kristaps 850: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.75 kristaps 851: return(ROFF_IGN);
852: }
853:
1.76 kristaps 854: if (r->last->endspan > -1) {
1.128 kristaps 855: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.76 kristaps 856: return(ROFF_IGN);
857: }
858:
859: if ((*bufp)[pos])
1.128 kristaps 860: mandoc_msg(MANDOCERR_ARGSLOST, r->parse, ln, pos, NULL);
1.76 kristaps 861:
1.75 kristaps 862: roffnode_pop(r);
1.76 kristaps 863: roffnode_cleanscope(r);
864: return(ROFF_IGN);
865: }
866:
1.75 kristaps 867:
1.76 kristaps 868: /* ARGSUSED */
869: static enum rofferr
1.80 kristaps 870: roff_block(ROFF_ARGS)
1.76 kristaps 871: {
1.78 kristaps 872: int sv;
873: size_t sz;
1.106 kristaps 874: char *name;
875:
876: name = NULL;
1.76 kristaps 877:
1.106 kristaps 878: if (ROFF_ig != tok) {
879: if ('\0' == (*bufp)[pos]) {
1.128 kristaps 880: mandoc_msg(MANDOCERR_NOARGS, r->parse, ln, ppos, NULL);
1.106 kristaps 881: return(ROFF_IGN);
882: }
1.107 kristaps 883:
884: /*
885: * Re-write `de1', since we don't really care about
886: * groff's strange compatibility mode, into `de'.
887: */
888:
1.106 kristaps 889: if (ROFF_de1 == tok)
890: tok = ROFF_de;
891: if (ROFF_de == tok)
892: name = *bufp + pos;
893: else
1.128 kristaps 894: mandoc_msg(MANDOCERR_REQUEST, r->parse, ln, ppos,
1.106 kristaps 895: roffs[tok].name);
1.107 kristaps 896:
1.131 schwarze 897: while ((*bufp)[pos] && ! isspace((unsigned char)(*bufp)[pos]))
1.80 kristaps 898: pos++;
1.107 kristaps 899:
1.131 schwarze 900: while (isspace((unsigned char)(*bufp)[pos]))
1.106 kristaps 901: (*bufp)[pos++] = '\0';
1.80 kristaps 902: }
903:
1.106 kristaps 904: roffnode_push(r, tok, name, ln, ppos);
905:
906: /*
907: * At the beginning of a `de' macro, clear the existing string
908: * with the same name, if there is one. New content will be
909: * added from roff_block_text() in multiline mode.
910: */
1.107 kristaps 911:
1.106 kristaps 912: if (ROFF_de == tok)
1.108 schwarze 913: roff_setstr(r, name, "", 0);
1.76 kristaps 914:
1.79 kristaps 915: if ('\0' == (*bufp)[pos])
1.78 kristaps 916: return(ROFF_IGN);
917:
1.107 kristaps 918: /* If present, process the custom end-of-line marker. */
919:
1.78 kristaps 920: sv = pos;
1.131 schwarze 921: while ((*bufp)[pos] && ! isspace((unsigned char)(*bufp)[pos]))
1.78 kristaps 922: pos++;
923:
924: /*
925: * Note: groff does NOT like escape characters in the input.
926: * Instead of detecting this, we're just going to let it fly and
927: * to hell with it.
928: */
929:
930: assert(pos > sv);
931: sz = (size_t)(pos - sv);
932:
1.79 kristaps 933: if (1 == sz && '.' == (*bufp)[sv])
934: return(ROFF_IGN);
935:
1.98 schwarze 936: r->last->end = mandoc_malloc(sz + 1);
1.78 kristaps 937:
938: memcpy(r->last->end, *bufp + sv, sz);
939: r->last->end[(int)sz] = '\0';
940:
1.77 kristaps 941: if ((*bufp)[pos])
1.128 kristaps 942: mandoc_msg(MANDOCERR_ARGSLOST, r->parse, ln, pos, NULL);
1.74 kristaps 943:
1.78 kristaps 944: return(ROFF_IGN);
945: }
946:
947:
948: /* ARGSUSED */
949: static enum rofferr
1.80 kristaps 950: roff_block_sub(ROFF_ARGS)
1.79 kristaps 951: {
952: enum rofft t;
953: int i, j;
954:
955: /*
956: * First check whether a custom macro exists at this level. If
957: * it does, then check against it. This is some of groff's
958: * stranger behaviours. If we encountered a custom end-scope
959: * tag and that tag also happens to be a "real" macro, then we
960: * need to try interpreting it again as a real macro. If it's
961: * not, then return ignore. Else continue.
962: */
963:
964: if (r->last->end) {
1.130 kristaps 965: for (i = pos, j = 0; r->last->end[j]; j++, i++)
1.79 kristaps 966: if ((*bufp)[i] != r->last->end[j])
967: break;
968:
969: if ('\0' == r->last->end[j] &&
970: ('\0' == (*bufp)[i] ||
971: ' ' == (*bufp)[i] ||
972: '\t' == (*bufp)[i])) {
973: roffnode_pop(r);
974: roffnode_cleanscope(r);
975:
1.130 kristaps 976: while (' ' == (*bufp)[i] || '\t' == (*bufp)[i])
977: i++;
978:
979: pos = i;
1.106 kristaps 980: if (ROFF_MAX != roff_parse(r, *bufp, &pos))
1.79 kristaps 981: return(ROFF_RERUN);
982: return(ROFF_IGN);
983: }
984: }
985:
986: /*
987: * If we have no custom end-query or lookup failed, then try
988: * pulling it out of the hashtable.
989: */
990:
1.137 schwarze 991: t = roff_parse(r, *bufp, &pos);
1.79 kristaps 992:
1.106 kristaps 993: /*
994: * Macros other than block-end are only significant
995: * in `de' blocks; elsewhere, simply throw them away.
996: */
997: if (ROFF_cblock != t) {
998: if (ROFF_de == tok)
999: roff_setstr(r, r->last->name, *bufp + ppos, 1);
1.79 kristaps 1000: return(ROFF_IGN);
1.106 kristaps 1001: }
1.79 kristaps 1002:
1003: assert(roffs[t].proc);
1.90 kristaps 1004: return((*roffs[t].proc)(r, t, bufp, szp,
1005: ln, ppos, pos, offs));
1.79 kristaps 1006: }
1007:
1008:
1009: /* ARGSUSED */
1010: static enum rofferr
1.80 kristaps 1011: roff_block_text(ROFF_ARGS)
1.78 kristaps 1012: {
1013:
1.106 kristaps 1014: if (ROFF_de == tok)
1015: roff_setstr(r, r->last->name, *bufp + pos, 1);
1016:
1.78 kristaps 1017: return(ROFF_IGN);
1018: }
1019:
1020:
1021: /* ARGSUSED */
1022: static enum rofferr
1.82 kristaps 1023: roff_cond_sub(ROFF_ARGS)
1024: {
1025: enum rofft t;
1026: enum roffrule rr;
1.139 kristaps 1027: char *ep;
1.82 kristaps 1028:
1029: rr = r->last->rule;
1.139 kristaps 1030: roffnode_cleanscope(r);
1.82 kristaps 1031:
1.139 kristaps 1032: /*
1033: * If the macro is unknown, first check if it contains a closing
1034: * delimiter `\}'. If it does, close out our scope and return
1035: * the currently-scoped rule (ignore or continue). Else, drop
1036: * into the currently-scoped rule.
1.87 kristaps 1037: */
1038:
1.106 kristaps 1039: if (ROFF_MAX == (t = roff_parse(r, *bufp, &pos))) {
1.139 kristaps 1040: ep = &(*bufp)[pos];
1041: for ( ; NULL != (ep = strchr(ep, '\\')); ep++) {
1042: ep++;
1043: if ('}' != *ep)
1044: continue;
1.144 kristaps 1045:
1046: /*
1047: * Make the \} go away.
1048: * This is a little haphazard, as it's not quite
1049: * clear how nroff does this.
1050: * If we're at the end of line, then just chop
1051: * off the \} and resize the buffer.
1052: * If we aren't, then conver it to spaces.
1053: */
1054:
1055: if ('\0' == *(ep + 1)) {
1056: *--ep = '\0';
1057: *szp -= 2;
1058: } else
1059: *(ep - 1) = *ep = ' ';
1060:
1.139 kristaps 1061: roff_ccond(r, ROFF_ccond, bufp, szp,
1062: ln, pos, pos + 2, offs);
1063: break;
1064: }
1.82 kristaps 1065: return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
1.100 kristaps 1066: }
1.82 kristaps 1067:
1068: /*
1069: * A denied conditional must evaluate its children if and only
1070: * if they're either structurally required (such as loops and
1071: * conditionals) or a closing macro.
1072: */
1.139 kristaps 1073:
1.82 kristaps 1074: if (ROFFRULE_DENY == rr)
1075: if ( ! (ROFFMAC_STRUCT & roffs[t].flags))
1076: if (ROFF_ccond != t)
1077: return(ROFF_IGN);
1078:
1079: assert(roffs[t].proc);
1.90 kristaps 1080: return((*roffs[t].proc)(r, t, bufp, szp,
1081: ln, ppos, pos, offs));
1.82 kristaps 1082: }
1083:
1084: /* ARGSUSED */
1085: static enum rofferr
1086: roff_cond_text(ROFF_ARGS)
1.78 kristaps 1087: {
1.140 kristaps 1088: char *ep;
1.82 kristaps 1089: enum roffrule rr;
1090:
1091: rr = r->last->rule;
1.140 kristaps 1092: roffnode_cleanscope(r);
1.82 kristaps 1093:
1.140 kristaps 1094: ep = &(*bufp)[pos];
1095: for ( ; NULL != (ep = strchr(ep, '\\')); ep++) {
1096: ep++;
1097: if ('}' != *ep)
1098: continue;
1099: *ep = '&';
1100: roff_ccond(r, ROFF_ccond, bufp, szp,
1101: ln, pos, pos + 2, offs);
1.78 kristaps 1102: }
1.82 kristaps 1103: return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
1.74 kristaps 1104: }
1105:
1.88 kristaps 1106: static enum roffrule
1107: roff_evalcond(const char *v, int *pos)
1108: {
1109:
1110: switch (v[*pos]) {
1111: case ('n'):
1112: (*pos)++;
1113: return(ROFFRULE_ALLOW);
1114: case ('e'):
1115: /* FALLTHROUGH */
1116: case ('o'):
1117: /* FALLTHROUGH */
1118: case ('t'):
1119: (*pos)++;
1120: return(ROFFRULE_DENY);
1121: default:
1122: break;
1123: }
1124:
1125: while (v[*pos] && ' ' != v[*pos])
1126: (*pos)++;
1127: return(ROFFRULE_DENY);
1128: }
1129:
1.75 kristaps 1130: /* ARGSUSED */
1.74 kristaps 1131: static enum rofferr
1.103 kristaps 1132: roff_line_ignore(ROFF_ARGS)
1.89 kristaps 1133: {
1.123 schwarze 1134:
1135: if (ROFF_it == tok)
1.128 kristaps 1136: mandoc_msg(MANDOCERR_REQUEST, r->parse, ln, ppos, "it");
1.89 kristaps 1137:
1138: return(ROFF_IGN);
1139: }
1140:
1.104 kristaps 1141: /* ARGSUSED */
1142: static enum rofferr
1.82 kristaps 1143: roff_cond(ROFF_ARGS)
1.74 kristaps 1144: {
1.173 schwarze 1145:
1146: roffnode_push(r, tok, NULL, ln, ppos);
1.74 kristaps 1147:
1.134 kristaps 1148: /*
1149: * An `.el' has no conditional body: it will consume the value
1150: * of the current rstack entry set in prior `ie' calls or
1151: * defaults to DENY.
1152: *
1153: * If we're not an `el', however, then evaluate the conditional.
1154: */
1.133 kristaps 1155:
1.173 schwarze 1156: r->last->rule = ROFF_el == tok ?
1.134 kristaps 1157: (r->rstackpos < 0 ?
1158: ROFFRULE_DENY : r->rstack[r->rstackpos--]) :
1159: roff_evalcond(*bufp, &pos);
1.77 kristaps 1160:
1.134 kristaps 1161: /*
1162: * An if-else will put the NEGATION of the current evaluated
1163: * conditional into the stack of rules.
1164: */
1165:
1.84 schwarze 1166: if (ROFF_ie == tok) {
1.134 kristaps 1167: if (r->rstackpos == RSTACK_MAX - 1) {
1168: mandoc_msg(MANDOCERR_MEM,
1169: r->parse, ln, ppos, NULL);
1170: return(ROFF_ERR);
1171: }
1172: r->rstack[++r->rstackpos] =
1173: ROFFRULE_DENY == r->last->rule ?
1174: ROFFRULE_ALLOW : ROFFRULE_DENY;
1.82 kristaps 1175: }
1.88 kristaps 1176:
1177: /* If the parent has false as its rule, then so do we. */
1178:
1.109 kristaps 1179: if (r->last->parent && ROFFRULE_DENY == r->last->parent->rule)
1.84 schwarze 1180: r->last->rule = ROFFRULE_DENY;
1.88 kristaps 1181:
1182: /*
1.173 schwarze 1183: * Determine scope.
1184: * If there is nothing on the line after the conditional,
1185: * not even whitespace, use next-line scope.
1.88 kristaps 1186: */
1.74 kristaps 1187:
1.173 schwarze 1188: if ('\0' == (*bufp)[pos]) {
1189: r->last->endspan = 2;
1190: goto out;
1191: }
1192:
1193: while (' ' == (*bufp)[pos])
1194: pos++;
1195:
1196: /* An opening brace requests multiline scope. */
1.75 kristaps 1197:
1198: if ('\\' == (*bufp)[pos] && '{' == (*bufp)[pos + 1]) {
1199: r->last->endspan = -1;
1200: pos += 2;
1.173 schwarze 1201: goto out;
1.109 kristaps 1202: }
1.74 kristaps 1203:
1.77 kristaps 1204: /*
1.173 schwarze 1205: * Anything else following the conditional causes
1206: * single-line scope. Warn if the scope contains
1207: * nothing but trailing whitespace.
1.77 kristaps 1208: */
1209:
1.75 kristaps 1210: if ('\0' == (*bufp)[pos])
1.173 schwarze 1211: mandoc_msg(MANDOCERR_NOARGS, r->parse, ln, ppos, NULL);
1.77 kristaps 1212:
1.173 schwarze 1213: r->last->endspan = 1;
1.74 kristaps 1214:
1.173 schwarze 1215: out:
1.75 kristaps 1216: *offs = pos;
1217: return(ROFF_RERUN);
1.83 schwarze 1218: }
1219:
1220:
1221: /* ARGSUSED */
1222: static enum rofferr
1.92 schwarze 1223: roff_ds(ROFF_ARGS)
1224: {
1.96 kristaps 1225: char *name, *string;
1226:
1227: /*
1228: * A symbol is named by the first word following the macro
1229: * invocation up to a space. Its value is anything after the
1230: * name's trailing whitespace and optional double-quote. Thus,
1231: *
1232: * [.ds foo "bar " ]
1233: *
1234: * will have `bar " ' as its value.
1235: */
1.92 schwarze 1236:
1.121 schwarze 1237: string = *bufp + pos;
1238: name = roff_getname(r, &string, ln, pos);
1.92 schwarze 1239: if ('\0' == *name)
1240: return(ROFF_IGN);
1241:
1.121 schwarze 1242: /* Read past initial double-quote. */
1243: if ('"' == *string)
1.92 schwarze 1244: string++;
1245:
1.96 kristaps 1246: /* The rest is the value. */
1.106 kristaps 1247: roff_setstr(r, name, string, 0);
1.92 schwarze 1248: return(ROFF_IGN);
1249: }
1250:
1.147 kristaps 1251: int
1252: roff_regisset(const struct roff *r, enum regs reg)
1253: {
1254:
1255: return(r->regs[(int)reg].set);
1256: }
1257:
1258: unsigned int
1259: roff_regget(const struct roff *r, enum regs reg)
1260: {
1261:
1262: return(r->regs[(int)reg].u);
1263: }
1264:
1265: void
1266: roff_regunset(struct roff *r, enum regs reg)
1267: {
1268:
1269: r->regs[(int)reg].set = 0;
1270: }
1.92 schwarze 1271:
1272: /* ARGSUSED */
1273: static enum rofferr
1.89 kristaps 1274: roff_nr(ROFF_ARGS)
1.83 schwarze 1275: {
1.121 schwarze 1276: const char *key;
1277: char *val;
1.138 kristaps 1278: int iv;
1.89 kristaps 1279:
1.121 schwarze 1280: val = *bufp + pos;
1281: key = roff_getname(r, &val, ln, pos);
1.89 kristaps 1282:
1283: if (0 == strcmp(key, "nS")) {
1.147 kristaps 1284: r->regs[(int)REG_nS].set = 1;
1.149 kristaps 1285: if ((iv = mandoc_strntoi(val, strlen(val), 10)) >= 0)
1.147 kristaps 1286: r->regs[(int)REG_nS].u = (unsigned)iv;
1.138 kristaps 1287: else
1.147 kristaps 1288: r->regs[(int)REG_nS].u = 0u;
1.109 kristaps 1289: }
1290:
1.122 schwarze 1291: return(ROFF_IGN);
1292: }
1293:
1294: /* ARGSUSED */
1295: static enum rofferr
1296: roff_rm(ROFF_ARGS)
1297: {
1298: const char *name;
1299: char *cp;
1300:
1301: cp = *bufp + pos;
1302: while ('\0' != *cp) {
1.127 kristaps 1303: name = roff_getname(r, &cp, ln, (int)(cp - *bufp));
1.122 schwarze 1304: if ('\0' != *name)
1305: roff_setstr(r, name, NULL, 0);
1306: }
1.109 kristaps 1307: return(ROFF_IGN);
1.175 schwarze 1308: }
1309:
1310: /* ARGSUSED */
1311: static enum rofferr
1312: roff_Dd(ROFF_ARGS)
1313: {
1314: const char *const *cp;
1315:
1316: if (MPARSE_MDOC != r->parsetype)
1317: for (cp = __mdoc_reserved; *cp; cp++)
1318: roff_setstr(r, *cp, NULL, 0);
1319:
1320: return(ROFF_CONT);
1321: }
1322:
1323: /* ARGSUSED */
1324: static enum rofferr
1325: roff_TH(ROFF_ARGS)
1326: {
1327: const char *const *cp;
1328:
1329: if (MPARSE_MDOC != r->parsetype)
1330: for (cp = __man_reserved; *cp; cp++)
1331: roff_setstr(r, *cp, NULL, 0);
1332:
1333: return(ROFF_CONT);
1.109 kristaps 1334: }
1335:
1336: /* ARGSUSED */
1337: static enum rofferr
1338: roff_TE(ROFF_ARGS)
1339: {
1340:
1341: if (NULL == r->tbl)
1.128 kristaps 1342: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.115 kristaps 1343: else
1.151 kristaps 1344: tbl_end(&r->tbl);
1.109 kristaps 1345:
1.112 kristaps 1346: return(ROFF_IGN);
1347: }
1348:
1349: /* ARGSUSED */
1350: static enum rofferr
1351: roff_T_(ROFF_ARGS)
1352: {
1353:
1354: if (NULL == r->tbl)
1.128 kristaps 1355: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.112 kristaps 1356: else
1.116 kristaps 1357: tbl_restart(ppos, ln, r->tbl);
1.112 kristaps 1358:
1.109 kristaps 1359: return(ROFF_IGN);
1360: }
1361:
1.156 kristaps 1362: #if 0
1363: static int
1.151 kristaps 1364: roff_closeeqn(struct roff *r)
1365: {
1366:
1367: return(r->eqn && ROFF_EQN == eqn_end(&r->eqn) ? 1 : 0);
1368: }
1.156 kristaps 1369: #endif
1.151 kristaps 1370:
1.156 kristaps 1371: static void
1.151 kristaps 1372: roff_openeqn(struct roff *r, const char *name, int line,
1373: int offs, const char *buf)
1.125 kristaps 1374: {
1.151 kristaps 1375: struct eqn_node *e;
1376: int poff;
1.125 kristaps 1377:
1378: assert(NULL == r->eqn);
1.151 kristaps 1379: e = eqn_alloc(name, offs, line, r->parse);
1.125 kristaps 1380:
1381: if (r->last_eqn)
1382: r->last_eqn->next = e;
1383: else
1384: r->first_eqn = r->last_eqn = e;
1385:
1386: r->eqn = r->last_eqn = e;
1.151 kristaps 1387:
1388: if (buf) {
1389: poff = 0;
1390: eqn_read(&r->eqn, line, buf, offs, &poff);
1391: }
1392: }
1393:
1394: /* ARGSUSED */
1395: static enum rofferr
1396: roff_EQ(ROFF_ARGS)
1397: {
1398:
1399: roff_openeqn(r, *bufp + pos, ln, ppos, NULL);
1.125 kristaps 1400: return(ROFF_IGN);
1401: }
1402:
1403: /* ARGSUSED */
1404: static enum rofferr
1405: roff_EN(ROFF_ARGS)
1406: {
1407:
1.128 kristaps 1408: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.125 kristaps 1409: return(ROFF_IGN);
1410: }
1411:
1412: /* ARGSUSED */
1413: static enum rofferr
1.109 kristaps 1414: roff_TS(ROFF_ARGS)
1415: {
1.176 ! schwarze 1416: struct tbl_node *tbl;
1.89 kristaps 1417:
1.115 kristaps 1418: if (r->tbl) {
1.128 kristaps 1419: mandoc_msg(MANDOCERR_SCOPEBROKEN, r->parse, ln, ppos, NULL);
1.151 kristaps 1420: tbl_end(&r->tbl);
1.115 kristaps 1421: }
1.83 schwarze 1422:
1.176 ! schwarze 1423: tbl = tbl_alloc(ppos, ln, r->parse);
1.113 kristaps 1424:
1425: if (r->last_tbl)
1.176 ! schwarze 1426: r->last_tbl->next = tbl;
1.113 kristaps 1427: else
1.176 ! schwarze 1428: r->first_tbl = r->last_tbl = tbl;
1.113 kristaps 1429:
1.176 ! schwarze 1430: r->tbl = r->last_tbl = tbl;
1.83 schwarze 1431: return(ROFF_IGN);
1.92 schwarze 1432: }
1433:
1.105 kristaps 1434: /* ARGSUSED */
1435: static enum rofferr
1.174 kristaps 1436: roff_cc(ROFF_ARGS)
1437: {
1438: const char *p;
1439:
1440: p = *bufp + pos;
1441:
1442: if ('\0' == *p || '.' == (r->control = *p++))
1443: r->control = 0;
1444:
1445: if ('\0' != *p)
1446: mandoc_msg(MANDOCERR_ARGCOUNT, r->parse, ln, ppos, NULL);
1447:
1448: return(ROFF_IGN);
1449: }
1450:
1451: /* ARGSUSED */
1452: static enum rofferr
1.164 kristaps 1453: roff_tr(ROFF_ARGS)
1454: {
1455: const char *p, *first, *second;
1456: size_t fsz, ssz;
1457: enum mandoc_esc esc;
1458:
1459: p = *bufp + pos;
1460:
1461: if ('\0' == *p) {
1462: mandoc_msg(MANDOCERR_ARGCOUNT, r->parse, ln, ppos, NULL);
1463: return(ROFF_IGN);
1464: }
1465:
1466: while ('\0' != *p) {
1467: fsz = ssz = 1;
1468:
1469: first = p++;
1470: if ('\\' == *first) {
1471: esc = mandoc_escape(&p, NULL, NULL);
1472: if (ESCAPE_ERROR == esc) {
1473: mandoc_msg
1474: (MANDOCERR_BADESCAPE, r->parse,
1475: ln, (int)(p - *bufp), NULL);
1476: return(ROFF_IGN);
1477: }
1478: fsz = (size_t)(p - first);
1479: }
1480:
1481: second = p++;
1482: if ('\\' == *second) {
1483: esc = mandoc_escape(&p, NULL, NULL);
1484: if (ESCAPE_ERROR == esc) {
1485: mandoc_msg
1486: (MANDOCERR_BADESCAPE, r->parse,
1487: ln, (int)(p - *bufp), NULL);
1488: return(ROFF_IGN);
1489: }
1490: ssz = (size_t)(p - second);
1.165 kristaps 1491: } else if ('\0' == *second) {
1.164 kristaps 1492: mandoc_msg(MANDOCERR_ARGCOUNT, r->parse,
1493: ln, (int)(p - *bufp), NULL);
1494: second = " ";
1.165 kristaps 1495: p--;
1.164 kristaps 1496: }
1497:
1.167 kristaps 1498: if (fsz > 1) {
1499: roff_setstrn(&r->xmbtab, first,
1500: fsz, second, ssz, 0);
1501: continue;
1502: }
1503:
1504: if (NULL == r->xtab)
1505: r->xtab = mandoc_calloc
1506: (128, sizeof(struct roffstr));
1507:
1508: free(r->xtab[(int)*first].p);
1509: r->xtab[(int)*first].p = mandoc_strndup(second, ssz);
1510: r->xtab[(int)*first].sz = ssz;
1.164 kristaps 1511: }
1512:
1513: return(ROFF_IGN);
1514: }
1515:
1516: /* ARGSUSED */
1517: static enum rofferr
1.105 kristaps 1518: roff_so(ROFF_ARGS)
1519: {
1520: char *name;
1521:
1.128 kristaps 1522: mandoc_msg(MANDOCERR_SO, r->parse, ln, ppos, NULL);
1.105 kristaps 1523:
1524: /*
1525: * Handle `so'. Be EXTREMELY careful, as we shouldn't be
1526: * opening anything that's not in our cwd or anything beneath
1527: * it. Thus, explicitly disallow traversing up the file-system
1528: * or using absolute paths.
1529: */
1530:
1531: name = *bufp + pos;
1532: if ('/' == *name || strstr(name, "../") || strstr(name, "/..")) {
1.128 kristaps 1533: mandoc_msg(MANDOCERR_SOPATH, r->parse, ln, pos, NULL);
1.105 kristaps 1534: return(ROFF_ERR);
1535: }
1536:
1537: *offs = pos;
1538: return(ROFF_SO);
1539: }
1.92 schwarze 1540:
1.106 kristaps 1541: /* ARGSUSED */
1542: static enum rofferr
1543: roff_userdef(ROFF_ARGS)
1.99 kristaps 1544: {
1.106 kristaps 1545: const char *arg[9];
1546: char *cp, *n1, *n2;
1.119 schwarze 1547: int i;
1.106 kristaps 1548:
1549: /*
1550: * Collect pointers to macro argument strings
1551: * and null-terminate them.
1552: */
1553: cp = *bufp + pos;
1.119 schwarze 1554: for (i = 0; i < 9; i++)
1.120 schwarze 1555: arg[i] = '\0' == *cp ? "" :
1.136 kristaps 1556: mandoc_getarg(r->parse, &cp, ln, &pos);
1.99 kristaps 1557:
1.106 kristaps 1558: /*
1559: * Expand macro arguments.
1.99 kristaps 1560: */
1.106 kristaps 1561: *szp = 0;
1562: n1 = cp = mandoc_strdup(r->current_string);
1563: while (NULL != (cp = strstr(cp, "\\$"))) {
1564: i = cp[2] - '1';
1565: if (0 > i || 8 < i) {
1566: /* Not an argument invocation. */
1567: cp += 2;
1568: continue;
1569: }
1570:
1571: *szp = strlen(n1) - 3 + strlen(arg[i]) + 1;
1572: n2 = mandoc_malloc(*szp);
1573:
1574: strlcpy(n2, n1, (size_t)(cp - n1 + 1));
1575: strlcat(n2, arg[i], *szp);
1576: strlcat(n2, cp + 3, *szp);
1577:
1578: cp = n2 + (cp - n1);
1579: free(n1);
1580: n1 = n2;
1.99 kristaps 1581: }
1582:
1.106 kristaps 1583: /*
1584: * Replace the macro invocation
1585: * by the expanded macro.
1586: */
1587: free(*bufp);
1588: *bufp = n1;
1589: if (0 == *szp)
1590: *szp = strlen(*bufp) + 1;
1591:
1592: return(*szp > 1 && '\n' == (*bufp)[(int)*szp - 2] ?
1593: ROFF_REPARSE : ROFF_APPEND);
1.99 kristaps 1594: }
1.121 schwarze 1595:
1596: static char *
1597: roff_getname(struct roff *r, char **cpp, int ln, int pos)
1598: {
1599: char *name, *cp;
1600:
1601: name = *cpp;
1602: if ('\0' == *name)
1603: return(name);
1604:
1605: /* Read until end of name. */
1606: for (cp = name; '\0' != *cp && ' ' != *cp; cp++) {
1607: if ('\\' != *cp)
1608: continue;
1609: cp++;
1610: if ('\\' == *cp)
1611: continue;
1.128 kristaps 1612: mandoc_msg(MANDOCERR_NAMESC, r->parse, ln, pos, NULL);
1.121 schwarze 1613: *cp = '\0';
1614: name = cp;
1615: }
1616:
1617: /* Nil-terminate name. */
1618: if ('\0' != *cp)
1619: *(cp++) = '\0';
1620:
1621: /* Read past spaces. */
1622: while (' ' == *cp)
1623: cp++;
1624:
1625: *cpp = cp;
1626: return(name);
1627: }
1628:
1.106 kristaps 1629: /*
1630: * Store *string into the user-defined string called *name.
1631: * In multiline mode, append to an existing entry and append '\n';
1632: * else replace the existing entry, if there is one.
1633: * To clear an existing entry, call with (*r, *name, NULL, 0).
1634: */
1.94 kristaps 1635: static void
1.106 kristaps 1636: roff_setstr(struct roff *r, const char *name, const char *string,
1637: int multiline)
1.92 schwarze 1638: {
1.164 kristaps 1639:
1640: roff_setstrn(&r->strtab, name, strlen(name), string,
1641: string ? strlen(string) : 0, multiline);
1642: }
1643:
1644: static void
1.166 kristaps 1645: roff_setstrn(struct roffkv **r, const char *name, size_t namesz,
1.164 kristaps 1646: const char *string, size_t stringsz, int multiline)
1647: {
1.166 kristaps 1648: struct roffkv *n;
1.164 kristaps 1649: char *c;
1650: int i;
1651: size_t oldch, newch;
1.92 schwarze 1652:
1.106 kristaps 1653: /* Search for an existing string with the same name. */
1.164 kristaps 1654: n = *r;
1655:
1.166 kristaps 1656: while (n && strcmp(name, n->key.p))
1.92 schwarze 1657: n = n->next;
1.94 kristaps 1658:
1659: if (NULL == n) {
1.106 kristaps 1660: /* Create a new string table entry. */
1.166 kristaps 1661: n = mandoc_malloc(sizeof(struct roffkv));
1662: n->key.p = mandoc_strndup(name, namesz);
1663: n->key.sz = namesz;
1664: n->val.p = NULL;
1665: n->val.sz = 0;
1.164 kristaps 1666: n->next = *r;
1667: *r = n;
1.106 kristaps 1668: } else if (0 == multiline) {
1669: /* In multiline mode, append; else replace. */
1.166 kristaps 1670: free(n->val.p);
1671: n->val.p = NULL;
1672: n->val.sz = 0;
1.106 kristaps 1673: }
1674:
1675: if (NULL == string)
1676: return;
1677:
1678: /*
1679: * One additional byte for the '\n' in multiline mode,
1680: * and one for the terminating '\0'.
1681: */
1.164 kristaps 1682: newch = stringsz + (multiline ? 2u : 1u);
1683:
1.166 kristaps 1684: if (NULL == n->val.p) {
1685: n->val.p = mandoc_malloc(newch);
1686: *n->val.p = '\0';
1.106 kristaps 1687: oldch = 0;
1688: } else {
1.166 kristaps 1689: oldch = n->val.sz;
1690: n->val.p = mandoc_realloc(n->val.p, oldch + newch);
1.106 kristaps 1691: }
1692:
1693: /* Skip existing content in the destination buffer. */
1.166 kristaps 1694: c = n->val.p + (int)oldch;
1.106 kristaps 1695:
1696: /* Append new content to the destination buffer. */
1.164 kristaps 1697: i = 0;
1698: while (i < (int)stringsz) {
1.106 kristaps 1699: /*
1700: * Rudimentary roff copy mode:
1701: * Handle escaped backslashes.
1702: */
1.164 kristaps 1703: if ('\\' == string[i] && '\\' == string[i + 1])
1704: i++;
1705: *c++ = string[i++];
1.106 kristaps 1706: }
1.94 kristaps 1707:
1.106 kristaps 1708: /* Append terminating bytes. */
1709: if (multiline)
1710: *c++ = '\n';
1.163 kristaps 1711:
1.106 kristaps 1712: *c = '\0';
1.166 kristaps 1713: n->val.sz = (int)(c - n->val.p);
1.92 schwarze 1714: }
1715:
1.94 kristaps 1716: static const char *
1717: roff_getstrn(const struct roff *r, const char *name, size_t len)
1.92 schwarze 1718: {
1.166 kristaps 1719: const struct roffkv *n;
1.92 schwarze 1720:
1.164 kristaps 1721: for (n = r->strtab; n; n = n->next)
1.166 kristaps 1722: if (0 == strncmp(name, n->key.p, len) &&
1723: '\0' == n->key.p[(int)len])
1724: return(n->val.p);
1.94 kristaps 1725:
1.157 kristaps 1726: return(NULL);
1.92 schwarze 1727: }
1728:
1.94 kristaps 1729: static void
1.167 kristaps 1730: roff_freestr(struct roffkv *r)
1.92 schwarze 1731: {
1.166 kristaps 1732: struct roffkv *n, *nn;
1.92 schwarze 1733:
1.167 kristaps 1734: for (n = r; n; n = nn) {
1.166 kristaps 1735: free(n->key.p);
1736: free(n->val.p);
1.92 schwarze 1737: nn = n->next;
1738: free(n);
1739: }
1.114 kristaps 1740: }
1741:
1742: const struct tbl_span *
1743: roff_span(const struct roff *r)
1744: {
1745:
1746: return(r->tbl ? tbl_span(r->tbl) : NULL);
1.125 kristaps 1747: }
1748:
1749: const struct eqn *
1750: roff_eqn(const struct roff *r)
1751: {
1752:
1753: return(r->last_eqn ? &r->last_eqn->eqn : NULL);
1.164 kristaps 1754: }
1755:
1756: /*
1757: * Duplicate an input string, making the appropriate character
1758: * conversations (as stipulated by `tr') along the way.
1759: * Returns a heap-allocated string with all the replacements made.
1760: */
1761: char *
1762: roff_strdup(const struct roff *r, const char *p)
1763: {
1.166 kristaps 1764: const struct roffkv *cp;
1.164 kristaps 1765: char *res;
1766: const char *pp;
1767: size_t ssz, sz;
1768: enum mandoc_esc esc;
1769:
1.167 kristaps 1770: if (NULL == r->xmbtab && NULL == r->xtab)
1.164 kristaps 1771: return(mandoc_strdup(p));
1772: else if ('\0' == *p)
1773: return(mandoc_strdup(""));
1774:
1775: /*
1776: * Step through each character looking for term matches
1777: * (remember that a `tr' can be invoked with an escape, which is
1778: * a glyph but the escape is multi-character).
1779: * We only do this if the character hash has been initialised
1780: * and the string is >0 length.
1781: */
1782:
1783: res = NULL;
1784: ssz = 0;
1785:
1786: while ('\0' != *p) {
1.167 kristaps 1787: if ('\\' != *p && r->xtab && r->xtab[(int)*p].p) {
1788: sz = r->xtab[(int)*p].sz;
1789: res = mandoc_realloc(res, ssz + sz + 1);
1790: memcpy(res + ssz, r->xtab[(int)*p].p, sz);
1791: ssz += sz;
1792: p++;
1793: continue;
1794: } else if ('\\' != *p) {
1795: res = mandoc_realloc(res, ssz + 2);
1796: res[ssz++] = *p++;
1797: continue;
1798: }
1799:
1.164 kristaps 1800: /* Search for term matches. */
1.167 kristaps 1801: for (cp = r->xmbtab; cp; cp = cp->next)
1.166 kristaps 1802: if (0 == strncmp(p, cp->key.p, cp->key.sz))
1.164 kristaps 1803: break;
1804:
1805: if (NULL != cp) {
1806: /*
1807: * A match has been found.
1808: * Append the match to the array and move
1809: * forward by its keysize.
1810: */
1.166 kristaps 1811: res = mandoc_realloc
1812: (res, ssz + cp->val.sz + 1);
1813: memcpy(res + ssz, cp->val.p, cp->val.sz);
1814: ssz += cp->val.sz;
1815: p += (int)cp->key.sz;
1.164 kristaps 1816: continue;
1817: }
1818:
1.167 kristaps 1819: /*
1820: * Handle escapes carefully: we need to copy
1821: * over just the escape itself, or else we might
1822: * do replacements within the escape itself.
1823: * Make sure to pass along the bogus string.
1824: */
1825: pp = p++;
1826: esc = mandoc_escape(&p, NULL, NULL);
1827: if (ESCAPE_ERROR == esc) {
1828: sz = strlen(pp);
1.164 kristaps 1829: res = mandoc_realloc(res, ssz + sz + 1);
1830: memcpy(res + ssz, pp, sz);
1.167 kristaps 1831: break;
1.164 kristaps 1832: }
1.167 kristaps 1833: /*
1834: * We bail out on bad escapes.
1835: * No need to warn: we already did so when
1836: * roff_res() was called.
1837: */
1838: sz = (int)(p - pp);
1839: res = mandoc_realloc(res, ssz + sz + 1);
1840: memcpy(res + ssz, pp, sz);
1841: ssz += sz;
1.164 kristaps 1842: }
1843:
1844: res[(int)ssz] = '\0';
1845: return(res);
1.174 kristaps 1846: }
1847:
1848: /*
1849: * Find out whether a line is a macro line or not.
1850: * If it is, adjust the current position and return one; if it isn't,
1851: * return zero and don't change the current position.
1852: * If the control character has been set with `.cc', then let that grain
1853: * precedence.
1854: * This is slighly contrary to groff, where using the non-breaking
1855: * control character when `cc' has been invoked will cause the
1856: * non-breaking macro contents to be printed verbatim.
1857: */
1858: int
1859: roff_getcontrol(const struct roff *r, const char *cp, int *ppos)
1860: {
1861: int pos;
1862:
1863: pos = *ppos;
1864:
1865: if (0 != r->control && cp[pos] == r->control)
1866: pos++;
1867: else if (0 != r->control)
1868: return(0);
1869: else if ('\\' == cp[pos] && '.' == cp[pos + 1])
1870: pos += 2;
1871: else if ('.' == cp[pos] || '\'' == cp[pos])
1872: pos++;
1873: else
1874: return(0);
1875:
1876: while (' ' == cp[pos] || '\t' == cp[pos])
1877: pos++;
1878:
1879: *ppos = pos;
1880: return(1);
1.74 kristaps 1881: }
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