Annotation of mandoc/roff.c, Revision 1.178
1.178 ! schwarze 1: /* $Id: roff.c,v 1.177 2013/06/27 09:49:47 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 {
77: ROFFRULE_ALLOW,
78: ROFFRULE_DENY
79: };
80:
1.147 kristaps 81: /*
82: * A single register entity. If "set" is zero, the value of the
83: * register should be the default one, which is per-register.
84: * Registers are assumed to be unsigned ints for now.
85: */
86: struct reg {
1.166 kristaps 87: int set; /* whether set or not */
88: unsigned int u; /* unsigned integer */
1.147 kristaps 89: };
90:
1.167 kristaps 91: /*
92: * An incredibly-simple string buffer.
93: */
1.94 kristaps 94: struct roffstr {
1.167 kristaps 95: char *p; /* nil-terminated buffer */
96: size_t sz; /* saved strlen(p) */
1.166 kristaps 97: };
98:
99: /*
1.167 kristaps 100: * A key-value roffstr pair as part of a singly-linked list.
1.166 kristaps 101: */
102: struct roffkv {
103: struct roffstr key;
104: struct roffstr val;
105: struct roffkv *next; /* next in list */
1.94 kristaps 106: };
107:
1.67 kristaps 108: struct roff {
1.175 schwarze 109: enum mparset parsetype; /* requested parse type */
1.128 kristaps 110: struct mparse *parse; /* parse point */
1.67 kristaps 111: struct roffnode *last; /* leaf of stack */
1.82 kristaps 112: enum roffrule rstack[RSTACK_MAX]; /* stack of !`ie' rules */
1.174 kristaps 113: char control; /* control character */
1.82 kristaps 114: int rstackpos; /* position in rstack */
1.147 kristaps 115: struct reg regs[REG__MAX];
1.166 kristaps 116: struct roffkv *strtab; /* user-defined strings & macros */
1.167 kristaps 117: struct roffkv *xmbtab; /* multi-byte trans table (`tr') */
118: struct roffstr *xtab; /* single-byte trans table (`tr') */
1.106 kristaps 119: const char *current_string; /* value of last called user macro */
1.118 kristaps 120: struct tbl_node *first_tbl; /* first table parsed */
121: struct tbl_node *last_tbl; /* last table parsed */
122: struct tbl_node *tbl; /* current table being parsed */
1.125 kristaps 123: struct eqn_node *last_eqn; /* last equation parsed */
124: struct eqn_node *first_eqn; /* first equation parsed */
125: struct eqn_node *eqn; /* current equation being parsed */
1.79 kristaps 126: };
127:
1.67 kristaps 128: struct roffnode {
129: enum rofft tok; /* type of node */
130: struct roffnode *parent; /* up one in stack */
131: int line; /* parse line */
132: int col; /* parse col */
1.106 kristaps 133: char *name; /* node name, e.g. macro name */
1.79 kristaps 134: char *end; /* end-rules: custom token */
135: int endspan; /* end-rules: next-line or infty */
1.82 kristaps 136: enum roffrule rule; /* current evaluation rule */
1.67 kristaps 137: };
138:
139: #define ROFF_ARGS struct roff *r, /* parse ctx */ \
1.72 kristaps 140: enum rofft tok, /* tok of macro */ \
1.67 kristaps 141: char **bufp, /* input buffer */ \
142: size_t *szp, /* size of input buffer */ \
143: int ln, /* parse line */ \
1.75 kristaps 144: int ppos, /* original pos in buffer */ \
145: int pos, /* current pos in buffer */ \
1.74 kristaps 146: int *offs /* reset offset of buffer data */
1.67 kristaps 147:
148: typedef enum rofferr (*roffproc)(ROFF_ARGS);
149:
150: struct roffmac {
151: const char *name; /* macro name */
1.79 kristaps 152: roffproc proc; /* process new macro */
153: roffproc text; /* process as child text of macro */
154: roffproc sub; /* process as child of macro */
155: int flags;
156: #define ROFFMAC_STRUCT (1 << 0) /* always interpret */
1.85 kristaps 157: struct roffmac *next;
1.67 kristaps 158: };
159:
1.141 kristaps 160: struct predef {
161: const char *name; /* predefined input name */
162: const char *str; /* replacement symbol */
163: };
164:
165: #define PREDEF(__name, __str) \
166: { (__name), (__str) },
167:
1.155 kristaps 168: static enum rofft roffhash_find(const char *, size_t);
169: static void roffhash_init(void);
170: static void roffnode_cleanscope(struct roff *);
171: static void roffnode_pop(struct roff *);
172: static void roffnode_push(struct roff *, enum rofft,
173: const char *, int, int);
1.80 kristaps 174: static enum rofferr roff_block(ROFF_ARGS);
175: static enum rofferr roff_block_text(ROFF_ARGS);
176: static enum rofferr roff_block_sub(ROFF_ARGS);
177: static enum rofferr roff_cblock(ROFF_ARGS);
1.174 kristaps 178: static enum rofferr roff_cc(ROFF_ARGS);
1.80 kristaps 179: static enum rofferr roff_ccond(ROFF_ARGS);
1.82 kristaps 180: static enum rofferr roff_cond(ROFF_ARGS);
181: static enum rofferr roff_cond_text(ROFF_ARGS);
182: static enum rofferr roff_cond_sub(ROFF_ARGS);
1.92 schwarze 183: static enum rofferr roff_ds(ROFF_ARGS);
1.94 kristaps 184: static enum roffrule roff_evalcond(const char *, int *);
1.155 kristaps 185: static void roff_free1(struct roff *);
1.167 kristaps 186: static void roff_freestr(struct roffkv *);
1.121 schwarze 187: static char *roff_getname(struct roff *, char **, int, int);
1.94 kristaps 188: static const char *roff_getstrn(const struct roff *,
189: const char *, size_t);
1.178 ! schwarze 190: static enum rofferr roff_it(ROFF_ARGS);
1.103 kristaps 191: static enum rofferr roff_line_ignore(ROFF_ARGS);
1.89 kristaps 192: static enum rofferr roff_nr(ROFF_ARGS);
1.169 schwarze 193: static void roff_openeqn(struct roff *, const char *,
1.156 kristaps 194: int, int, const char *);
1.155 kristaps 195: static enum rofft roff_parse(struct roff *, const char *, int *);
1.178 ! schwarze 196: static enum rofferr roff_parsetext(char **, size_t *, int, int *);
1.172 schwarze 197: static enum rofferr roff_res(struct roff *,
1.142 kristaps 198: char **, size_t *, int, int);
1.122 schwarze 199: static enum rofferr roff_rm(ROFF_ARGS);
1.94 kristaps 200: static void roff_setstr(struct roff *,
1.106 kristaps 201: const char *, const char *, int);
1.166 kristaps 202: static void roff_setstrn(struct roffkv **, const char *,
1.164 kristaps 203: size_t, const char *, size_t, int);
1.105 kristaps 204: static enum rofferr roff_so(ROFF_ARGS);
1.164 kristaps 205: static enum rofferr roff_tr(ROFF_ARGS);
1.175 schwarze 206: static enum rofferr roff_Dd(ROFF_ARGS);
207: static enum rofferr roff_TH(ROFF_ARGS);
1.109 kristaps 208: static enum rofferr roff_TE(ROFF_ARGS);
209: static enum rofferr roff_TS(ROFF_ARGS);
1.125 kristaps 210: static enum rofferr roff_EQ(ROFF_ARGS);
211: static enum rofferr roff_EN(ROFF_ARGS);
1.112 kristaps 212: static enum rofferr roff_T_(ROFF_ARGS);
1.106 kristaps 213: static enum rofferr roff_userdef(ROFF_ARGS);
1.67 kristaps 214:
1.155 kristaps 215: /* See roffhash_find() */
1.85 kristaps 216:
217: #define ASCII_HI 126
218: #define ASCII_LO 33
219: #define HASHWIDTH (ASCII_HI - ASCII_LO + 1)
220:
221: static struct roffmac *hash[HASHWIDTH];
222:
223: static struct roffmac roffs[ROFF_MAX] = {
1.103 kristaps 224: { "ad", roff_line_ignore, NULL, NULL, 0, NULL },
1.85 kristaps 225: { "am", roff_block, roff_block_text, roff_block_sub, 0, NULL },
226: { "ami", roff_block, roff_block_text, roff_block_sub, 0, NULL },
227: { "am1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.174 kristaps 228: { "cc", roff_cc, NULL, NULL, 0, NULL },
1.85 kristaps 229: { "de", roff_block, roff_block_text, roff_block_sub, 0, NULL },
230: { "dei", roff_block, roff_block_text, roff_block_sub, 0, NULL },
231: { "de1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.92 schwarze 232: { "ds", roff_ds, NULL, NULL, 0, NULL },
1.85 kristaps 233: { "el", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
1.103 kristaps 234: { "hy", roff_line_ignore, NULL, NULL, 0, NULL },
1.85 kristaps 235: { "ie", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
236: { "if", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
237: { "ig", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.178 ! schwarze 238: { "it", roff_it, NULL, NULL, 0, NULL },
1.103 kristaps 239: { "ne", roff_line_ignore, NULL, NULL, 0, NULL },
240: { "nh", roff_line_ignore, NULL, NULL, 0, NULL },
1.104 kristaps 241: { "nr", roff_nr, NULL, NULL, 0, NULL },
1.124 schwarze 242: { "ns", roff_line_ignore, NULL, NULL, 0, NULL },
243: { "ps", roff_line_ignore, NULL, NULL, 0, NULL },
1.122 schwarze 244: { "rm", roff_rm, NULL, NULL, 0, NULL },
1.105 kristaps 245: { "so", roff_so, NULL, NULL, 0, NULL },
1.124 schwarze 246: { "ta", roff_line_ignore, NULL, NULL, 0, NULL },
1.164 kristaps 247: { "tr", roff_tr, NULL, NULL, 0, NULL },
1.175 schwarze 248: { "Dd", roff_Dd, NULL, NULL, 0, NULL },
249: { "TH", roff_TH, NULL, NULL, 0, NULL },
1.109 kristaps 250: { "TS", roff_TS, NULL, NULL, 0, NULL },
251: { "TE", roff_TE, NULL, NULL, 0, NULL },
1.112 kristaps 252: { "T&", roff_T_, NULL, NULL, 0, NULL },
1.125 kristaps 253: { "EQ", roff_EQ, NULL, NULL, 0, NULL },
254: { "EN", roff_EN, NULL, NULL, 0, NULL },
1.85 kristaps 255: { ".", roff_cblock, NULL, NULL, 0, NULL },
256: { "\\}", roff_ccond, NULL, NULL, 0, NULL },
1.106 kristaps 257: { NULL, roff_userdef, NULL, NULL, 0, NULL },
1.67 kristaps 258: };
259:
1.175 schwarze 260: const char *const __mdoc_reserved[] = {
261: "Ac", "Ad", "An", "Ao", "Ap", "Aq", "Ar", "At",
262: "Bc", "Bd", "Bf", "Bk", "Bl", "Bo", "Bq",
263: "Brc", "Bro", "Brq", "Bsx", "Bt", "Bx",
264: "Cd", "Cm", "Db", "Dc", "Dd", "Dl", "Do", "Dq",
265: "Ds", "Dt", "Dv", "Dx", "D1",
266: "Ec", "Ed", "Ef", "Ek", "El", "Em", "em",
267: "En", "Eo", "Eq", "Er", "Es", "Ev", "Ex",
268: "Fa", "Fc", "Fd", "Fl", "Fn", "Fo", "Fr", "Ft", "Fx",
269: "Hf", "Ic", "In", "It", "Lb", "Li", "Lk", "Lp", "LP",
270: "Me", "Ms", "Mt", "Nd", "Nm", "No", "Ns", "Nx",
271: "Oc", "Oo", "Op", "Os", "Ot", "Ox",
272: "Pa", "Pc", "Pf", "Po", "Pp", "PP", "pp", "Pq",
273: "Qc", "Ql", "Qo", "Qq", "Or", "Rd", "Re", "Rs", "Rv",
274: "Sc", "Sf", "Sh", "SH", "Sm", "So", "Sq",
275: "Ss", "St", "Sx", "Sy",
276: "Ta", "Tn", "Ud", "Ux", "Va", "Vt", "Xc", "Xo", "Xr",
277: "%A", "%B", "%D", "%I", "%J", "%N", "%O",
278: "%P", "%Q", "%R", "%T", "%U", "%V",
279: NULL
280: };
281:
282: const char *const __man_reserved[] = {
283: "AT", "B", "BI", "BR", "BT", "DE", "DS", "DT",
284: "EE", "EN", "EQ", "EX", "HF", "HP", "I", "IB", "IP", "IR",
285: "LP", "ME", "MT", "OP", "P", "PD", "PP", "PT",
286: "R", "RB", "RE", "RI", "RS", "SB", "SH", "SM", "SS", "SY",
287: "TE", "TH", "TP", "TQ", "TS", "T&", "UC", "UE", "UR", "YS",
288: NULL
289: };
290:
1.141 kristaps 291: /* Array of injected predefined strings. */
292: #define PREDEFS_MAX 38
293: static const struct predef predefs[PREDEFS_MAX] = {
294: #include "predefs.in"
295: };
296:
1.155 kristaps 297: /* See roffhash_find() */
1.85 kristaps 298: #define ROFF_HASH(p) (p[0] - ASCII_LO)
299:
1.178 ! schwarze 300: static int roffit_lines; /* number of lines to delay */
! 301: static char *roffit_macro; /* nil-terminated macro line */
! 302:
1.85 kristaps 303: static void
1.155 kristaps 304: roffhash_init(void)
1.85 kristaps 305: {
306: struct roffmac *n;
307: int buc, i;
308:
1.106 kristaps 309: for (i = 0; i < (int)ROFF_USERDEF; i++) {
1.85 kristaps 310: assert(roffs[i].name[0] >= ASCII_LO);
311: assert(roffs[i].name[0] <= ASCII_HI);
312:
313: buc = ROFF_HASH(roffs[i].name);
314:
315: if (NULL != (n = hash[buc])) {
316: for ( ; n->next; n = n->next)
317: /* Do nothing. */ ;
318: n->next = &roffs[i];
319: } else
320: hash[buc] = &roffs[i];
321: }
322: }
323:
1.67 kristaps 324: /*
325: * Look up a roff token by its name. Returns ROFF_MAX if no macro by
326: * the nil-terminated string name could be found.
327: */
328: static enum rofft
1.155 kristaps 329: roffhash_find(const char *p, size_t s)
1.67 kristaps 330: {
1.85 kristaps 331: int buc;
332: struct roffmac *n;
1.67 kristaps 333:
1.85 kristaps 334: /*
335: * libroff has an extremely simple hashtable, for the time
336: * being, which simply keys on the first character, which must
337: * be printable, then walks a chain. It works well enough until
338: * optimised.
339: */
340:
341: if (p[0] < ASCII_LO || p[0] > ASCII_HI)
342: return(ROFF_MAX);
343:
344: buc = ROFF_HASH(p);
345:
346: if (NULL == (n = hash[buc]))
347: return(ROFF_MAX);
348: for ( ; n; n = n->next)
1.106 kristaps 349: if (0 == strncmp(n->name, p, s) && '\0' == n->name[(int)s])
1.85 kristaps 350: return((enum rofft)(n - roffs));
1.67 kristaps 351:
352: return(ROFF_MAX);
353: }
354:
355:
356: /*
357: * Pop the current node off of the stack of roff instructions currently
358: * pending.
359: */
360: static void
361: roffnode_pop(struct roff *r)
362: {
363: struct roffnode *p;
364:
1.75 kristaps 365: assert(r->last);
366: p = r->last;
1.82 kristaps 367:
1.75 kristaps 368: r->last = r->last->parent;
1.106 kristaps 369: free(p->name);
370: free(p->end);
1.67 kristaps 371: free(p);
372: }
373:
374:
375: /*
376: * Push a roff node onto the instruction stack. This must later be
377: * removed with roffnode_pop().
378: */
1.98 schwarze 379: static void
1.106 kristaps 380: roffnode_push(struct roff *r, enum rofft tok, const char *name,
381: int line, int col)
1.67 kristaps 382: {
383: struct roffnode *p;
384:
1.98 schwarze 385: p = mandoc_calloc(1, sizeof(struct roffnode));
1.67 kristaps 386: p->tok = tok;
1.106 kristaps 387: if (name)
388: p->name = mandoc_strdup(name);
1.67 kristaps 389: p->parent = r->last;
390: p->line = line;
391: p->col = col;
1.79 kristaps 392: p->rule = p->parent ? p->parent->rule : ROFFRULE_DENY;
1.67 kristaps 393:
394: r->last = p;
395: }
396:
397:
398: static void
399: roff_free1(struct roff *r)
400: {
1.176 schwarze 401: struct tbl_node *tbl;
1.125 kristaps 402: struct eqn_node *e;
1.167 kristaps 403: int i;
1.67 kristaps 404:
1.176 schwarze 405: while (NULL != (tbl = r->first_tbl)) {
406: r->first_tbl = tbl->next;
407: tbl_free(tbl);
1.109 kristaps 408: }
409:
1.113 kristaps 410: r->first_tbl = r->last_tbl = r->tbl = NULL;
411:
1.125 kristaps 412: while (NULL != (e = r->first_eqn)) {
413: r->first_eqn = e->next;
414: eqn_free(e);
415: }
416:
417: r->first_eqn = r->last_eqn = r->eqn = NULL;
418:
1.67 kristaps 419: while (r->last)
420: roffnode_pop(r);
1.109 kristaps 421:
1.167 kristaps 422: roff_freestr(r->strtab);
423: roff_freestr(r->xmbtab);
424:
425: r->strtab = r->xmbtab = NULL;
426:
427: if (r->xtab)
428: for (i = 0; i < 128; i++)
429: free(r->xtab[i].p);
430:
431: free(r->xtab);
432: r->xtab = NULL;
1.67 kristaps 433: }
434:
435: void
436: roff_reset(struct roff *r)
437: {
1.143 kristaps 438: int i;
1.67 kristaps 439:
440: roff_free1(r);
1.143 kristaps 441:
1.174 kristaps 442: r->control = 0;
1.147 kristaps 443: memset(&r->regs, 0, sizeof(struct reg) * REG__MAX);
444:
1.143 kristaps 445: for (i = 0; i < PREDEFS_MAX; i++)
446: roff_setstr(r, predefs[i].name, predefs[i].str, 0);
1.67 kristaps 447: }
448:
449:
450: void
451: roff_free(struct roff *r)
452: {
453:
454: roff_free1(r);
455: free(r);
456: }
457:
458:
459: struct roff *
1.175 schwarze 460: roff_alloc(enum mparset type, struct mparse *parse)
1.67 kristaps 461: {
462: struct roff *r;
1.141 kristaps 463: int i;
1.67 kristaps 464:
1.98 schwarze 465: r = mandoc_calloc(1, sizeof(struct roff));
1.175 schwarze 466: r->parsetype = type;
1.128 kristaps 467: r->parse = parse;
1.82 kristaps 468: r->rstackpos = -1;
1.85 kristaps 469:
1.155 kristaps 470: roffhash_init();
1.141 kristaps 471:
472: for (i = 0; i < PREDEFS_MAX; i++)
473: roff_setstr(r, predefs[i].name, predefs[i].str, 0);
474:
1.67 kristaps 475: return(r);
476: }
477:
1.94 kristaps 478: /*
479: * Pre-filter each and every line for reserved words (one beginning with
480: * `\*', e.g., `\*(ab'). These must be handled before the actual line
481: * is processed.
1.153 kristaps 482: * This also checks the syntax of regular escapes.
1.154 kristaps 483: */
1.172 schwarze 484: static enum rofferr
1.142 kristaps 485: roff_res(struct roff *r, char **bufp, size_t *szp, int ln, int pos)
1.94 kristaps 486: {
1.152 kristaps 487: enum mandoc_esc esc;
1.108 schwarze 488: const char *stesc; /* start of an escape sequence ('\\') */
489: const char *stnam; /* start of the name, after "[(*" */
490: const char *cp; /* end of the name, e.g. before ']' */
491: const char *res; /* the string to be substituted */
1.170 schwarze 492: int i, maxl, expand_count;
1.94 kristaps 493: size_t nsz;
494: char *n;
495:
1.170 schwarze 496: expand_count = 0;
497:
1.154 kristaps 498: again:
1.108 schwarze 499: cp = *bufp + pos;
500: while (NULL != (cp = strchr(cp, '\\'))) {
501: stesc = cp++;
502:
503: /*
504: * The second character must be an asterisk.
505: * If it isn't, skip it anyway: It is escaped,
506: * so it can't start another escape sequence.
507: */
508:
509: if ('\0' == *cp)
1.172 schwarze 510: return(ROFF_CONT);
1.152 kristaps 511:
512: if ('*' != *cp) {
513: res = cp;
514: esc = mandoc_escape(&cp, NULL, NULL);
515: if (ESCAPE_ERROR != esc)
516: continue;
517: cp = res;
1.153 kristaps 518: mandoc_msg
519: (MANDOCERR_BADESCAPE, r->parse,
520: ln, (int)(stesc - *bufp), NULL);
1.172 schwarze 521: return(ROFF_CONT);
1.152 kristaps 522: }
523:
524: cp++;
1.108 schwarze 525:
526: /*
527: * The third character decides the length
528: * of the name of the string.
529: * Save a pointer to the name.
530: */
531:
1.94 kristaps 532: switch (*cp) {
1.108 schwarze 533: case ('\0'):
1.172 schwarze 534: return(ROFF_CONT);
1.94 kristaps 535: case ('('):
536: cp++;
537: maxl = 2;
538: break;
539: case ('['):
540: cp++;
541: maxl = 0;
542: break;
543: default:
544: maxl = 1;
545: break;
546: }
1.108 schwarze 547: stnam = cp;
1.94 kristaps 548:
1.108 schwarze 549: /* Advance to the end of the name. */
1.94 kristaps 550:
551: for (i = 0; 0 == maxl || i < maxl; i++, cp++) {
1.153 kristaps 552: if ('\0' == *cp) {
553: mandoc_msg
554: (MANDOCERR_BADESCAPE,
555: r->parse, ln,
556: (int)(stesc - *bufp), NULL);
1.172 schwarze 557: return(ROFF_CONT);
1.153 kristaps 558: }
1.94 kristaps 559: if (0 == maxl && ']' == *cp)
560: break;
561: }
562:
1.108 schwarze 563: /*
564: * Retrieve the replacement string; if it is
565: * undefined, resume searching for escapes.
566: */
567:
568: res = roff_getstrn(r, stnam, (size_t)i);
1.94 kristaps 569:
570: if (NULL == res) {
1.153 kristaps 571: mandoc_msg
572: (MANDOCERR_BADESCAPE, r->parse,
573: ln, (int)(stesc - *bufp), NULL);
1.142 kristaps 574: res = "";
1.94 kristaps 575: }
576:
1.108 schwarze 577: /* Replace the escape sequence by the string. */
578:
1.161 kristaps 579: pos = stesc - *bufp;
1.154 kristaps 580:
1.94 kristaps 581: nsz = *szp + strlen(res) + 1;
582: n = mandoc_malloc(nsz);
583:
1.108 schwarze 584: strlcpy(n, *bufp, (size_t)(stesc - *bufp + 1));
1.94 kristaps 585: strlcat(n, res, nsz);
586: strlcat(n, cp + (maxl ? 0 : 1), nsz);
587:
588: free(*bufp);
589:
590: *bufp = n;
591: *szp = nsz;
1.170 schwarze 592:
593: if (EXPAND_LIMIT >= ++expand_count)
594: goto again;
595:
596: /* Just leave the string unexpanded. */
597: mandoc_msg(MANDOCERR_ROFFLOOP, r->parse, ln, pos, NULL);
1.172 schwarze 598: return(ROFF_IGN);
1.154 kristaps 599: }
1.172 schwarze 600: return(ROFF_CONT);
1.154 kristaps 601: }
602:
603: /*
1.178 ! schwarze 604: * Process text streams:
! 605: * Convert all breakable hyphens into ASCII_HYPH.
! 606: * Decrement and spring input line trap.
1.154 kristaps 607: */
608: static enum rofferr
1.178 ! schwarze 609: roff_parsetext(char **bufp, size_t *szp, int pos, int *offs)
1.154 kristaps 610: {
611: size_t sz;
612: const char *start;
1.178 ! schwarze 613: char *p;
! 614: int isz;
1.154 kristaps 615: enum mandoc_esc esc;
616:
1.178 ! schwarze 617: start = p = *bufp + pos;
1.154 kristaps 618:
619: while ('\0' != *p) {
620: sz = strcspn(p, "-\\");
621: p += sz;
622:
1.159 kristaps 623: if ('\0' == *p)
624: break;
625:
1.154 kristaps 626: if ('\\' == *p) {
627: /* Skip over escapes. */
628: p++;
629: esc = mandoc_escape
630: ((const char **)&p, NULL, NULL);
631: if (ESCAPE_ERROR == esc)
632: break;
1.155 kristaps 633: continue;
1.159 kristaps 634: } else if (p == start) {
1.158 kristaps 635: p++;
1.155 kristaps 636: continue;
1.158 kristaps 637: }
1.155 kristaps 638:
1.171 schwarze 639: if (isalpha((unsigned char)p[-1]) &&
640: isalpha((unsigned char)p[1]))
1.155 kristaps 641: *p = ASCII_HYPH;
642: p++;
1.94 kristaps 643: }
644:
1.178 ! schwarze 645: /* Spring the input line trap. */
! 646: if (1 == roffit_lines) {
! 647: isz = asprintf(&p, "%s\n.%s", *bufp, roffit_macro);
! 648: if (-1 == isz) {
! 649: perror(NULL);
! 650: exit((int)MANDOCLEVEL_SYSERR);
! 651: }
! 652: free(*bufp);
! 653: *bufp = p;
! 654: *szp = isz + 1;
! 655: *offs = 0;
! 656: free(roffit_macro);
! 657: roffit_lines = 0;
! 658: return(ROFF_REPARSE);
! 659: } else if (1 < roffit_lines)
! 660: --roffit_lines;
1.154 kristaps 661: return(ROFF_CONT);
1.94 kristaps 662: }
663:
1.67 kristaps 664: enum rofferr
1.90 kristaps 665: roff_parseln(struct roff *r, int ln, char **bufp,
666: size_t *szp, int pos, int *offs)
1.67 kristaps 667: {
668: enum rofft t;
1.109 kristaps 669: enum rofferr e;
1.130 kristaps 670: int ppos, ctl;
1.79 kristaps 671:
672: /*
1.94 kristaps 673: * Run the reserved-word filter only if we have some reserved
674: * words to fill in.
675: */
676:
1.172 schwarze 677: e = roff_res(r, bufp, szp, ln, pos);
678: if (ROFF_IGN == e)
679: return(e);
680: assert(ROFF_CONT == e);
1.94 kristaps 681:
1.130 kristaps 682: ppos = pos;
1.174 kristaps 683: ctl = roff_getcontrol(r, *bufp, &pos);
1.130 kristaps 684:
1.94 kristaps 685: /*
1.79 kristaps 686: * First, if a scope is open and we're not a macro, pass the
687: * text through the macro's filter. If a scope isn't open and
688: * we're not a macro, just let it through.
1.125 kristaps 689: * Finally, if there's an equation scope open, divert it into it
690: * no matter our state.
1.79 kristaps 691: */
1.74 kristaps 692:
1.130 kristaps 693: if (r->last && ! ctl) {
1.78 kristaps 694: t = r->last->tok;
695: assert(roffs[t].text);
1.109 kristaps 696: e = (*roffs[t].text)
697: (r, t, bufp, szp, ln, pos, pos, offs);
698: assert(ROFF_IGN == e || ROFF_CONT == e);
1.125 kristaps 699: if (ROFF_CONT != e)
700: return(e);
701: if (r->eqn)
1.146 kristaps 702: return(eqn_read(&r->eqn, ln, *bufp, pos, offs));
1.125 kristaps 703: if (r->tbl)
1.130 kristaps 704: return(tbl_read(r->tbl, ln, *bufp, pos));
1.178 ! schwarze 705: return(roff_parsetext(bufp, szp, pos, offs));
1.130 kristaps 706: } else if ( ! ctl) {
1.125 kristaps 707: if (r->eqn)
1.146 kristaps 708: return(eqn_read(&r->eqn, ln, *bufp, pos, offs));
1.109 kristaps 709: if (r->tbl)
1.130 kristaps 710: return(tbl_read(r->tbl, ln, *bufp, pos));
1.178 ! schwarze 711: return(roff_parsetext(bufp, szp, pos, offs));
1.125 kristaps 712: } else if (r->eqn)
1.146 kristaps 713: return(eqn_read(&r->eqn, ln, *bufp, ppos, offs));
1.67 kristaps 714:
1.79 kristaps 715: /*
716: * If a scope is open, go to the child handler for that macro,
717: * as it may want to preprocess before doing anything with it.
1.125 kristaps 718: * Don't do so if an equation is open.
1.79 kristaps 719: */
1.78 kristaps 720:
1.79 kristaps 721: if (r->last) {
722: t = r->last->tok;
723: assert(roffs[t].sub);
724: return((*roffs[t].sub)
1.90 kristaps 725: (r, t, bufp, szp,
1.130 kristaps 726: ln, ppos, pos, offs));
1.79 kristaps 727: }
1.78 kristaps 728:
1.79 kristaps 729: /*
730: * Lastly, as we've no scope open, try to look up and execute
731: * the new macro. If no macro is found, simply return and let
732: * the compilers handle it.
733: */
1.67 kristaps 734:
1.106 kristaps 735: if (ROFF_MAX == (t = roff_parse(r, *bufp, &pos)))
1.79 kristaps 736: return(ROFF_CONT);
1.67 kristaps 737:
1.75 kristaps 738: assert(roffs[t].proc);
1.78 kristaps 739: return((*roffs[t].proc)
1.90 kristaps 740: (r, t, bufp, szp,
741: ln, ppos, pos, offs));
1.74 kristaps 742: }
743:
744:
1.117 kristaps 745: void
1.74 kristaps 746: roff_endparse(struct roff *r)
747: {
748:
1.110 kristaps 749: if (r->last)
1.128 kristaps 750: mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse,
1.109 kristaps 751: r->last->line, r->last->col, NULL);
1.117 kristaps 752:
1.125 kristaps 753: if (r->eqn) {
1.128 kristaps 754: mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse,
1.148 kristaps 755: r->eqn->eqn.ln, r->eqn->eqn.pos, NULL);
1.151 kristaps 756: eqn_end(&r->eqn);
1.125 kristaps 757: }
758:
1.117 kristaps 759: if (r->tbl) {
1.128 kristaps 760: mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse,
1.117 kristaps 761: r->tbl->line, r->tbl->pos, NULL);
1.151 kristaps 762: tbl_end(&r->tbl);
1.117 kristaps 763: }
1.67 kristaps 764: }
765:
766: /*
767: * Parse a roff node's type from the input buffer. This must be in the
768: * form of ".foo xxx" in the usual way.
769: */
770: static enum rofft
1.106 kristaps 771: roff_parse(struct roff *r, const char *buf, int *pos)
1.67 kristaps 772: {
1.106 kristaps 773: const char *mac;
774: size_t maclen;
1.67 kristaps 775: enum rofft t;
776:
1.144 kristaps 777: if ('\0' == buf[*pos] || '"' == buf[*pos] ||
778: '\t' == buf[*pos] || ' ' == buf[*pos])
1.67 kristaps 779: return(ROFF_MAX);
780:
1.144 kristaps 781: /*
782: * We stop the macro parse at an escape, tab, space, or nil.
783: * However, `\}' is also a valid macro, so make sure we don't
784: * clobber it by seeing the `\' as the end of token.
785: */
786:
1.106 kristaps 787: mac = buf + *pos;
1.144 kristaps 788: maclen = strcspn(mac + 1, " \\\t\0") + 1;
1.67 kristaps 789:
1.106 kristaps 790: t = (r->current_string = roff_getstrn(r, mac, maclen))
1.155 kristaps 791: ? ROFF_USERDEF : roffhash_find(mac, maclen);
1.67 kristaps 792:
1.127 kristaps 793: *pos += (int)maclen;
1.130 kristaps 794:
1.67 kristaps 795: while (buf[*pos] && ' ' == buf[*pos])
796: (*pos)++;
797:
798: return(t);
799: }
800:
801: /* ARGSUSED */
802: static enum rofferr
1.76 kristaps 803: roff_cblock(ROFF_ARGS)
1.67 kristaps 804: {
805:
1.79 kristaps 806: /*
807: * A block-close `..' should only be invoked as a child of an
808: * ignore macro, otherwise raise a warning and just ignore it.
809: */
810:
1.76 kristaps 811: if (NULL == r->last) {
1.128 kristaps 812: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.76 kristaps 813: return(ROFF_IGN);
814: }
1.67 kristaps 815:
1.81 kristaps 816: switch (r->last->tok) {
817: case (ROFF_am):
818: /* FALLTHROUGH */
819: case (ROFF_ami):
820: /* FALLTHROUGH */
821: case (ROFF_am1):
822: /* FALLTHROUGH */
823: case (ROFF_de):
1.108 schwarze 824: /* ROFF_de1 is remapped to ROFF_de in roff_block(). */
1.81 kristaps 825: /* FALLTHROUGH */
826: case (ROFF_dei):
827: /* FALLTHROUGH */
828: case (ROFF_ig):
829: break;
830: default:
1.128 kristaps 831: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.67 kristaps 832: return(ROFF_IGN);
1.76 kristaps 833: }
1.67 kristaps 834:
1.76 kristaps 835: if ((*bufp)[pos])
1.128 kristaps 836: mandoc_msg(MANDOCERR_ARGSLOST, r->parse, ln, pos, NULL);
1.71 kristaps 837:
838: roffnode_pop(r);
1.76 kristaps 839: roffnode_cleanscope(r);
840: return(ROFF_IGN);
1.71 kristaps 841:
1.67 kristaps 842: }
843:
844:
1.76 kristaps 845: static void
846: roffnode_cleanscope(struct roff *r)
1.67 kristaps 847: {
848:
1.76 kristaps 849: while (r->last) {
1.173 schwarze 850: if (--r->last->endspan != 0)
1.76 kristaps 851: break;
852: roffnode_pop(r);
853: }
1.67 kristaps 854: }
855:
856:
1.75 kristaps 857: /* ARGSUSED */
1.74 kristaps 858: static enum rofferr
1.75 kristaps 859: roff_ccond(ROFF_ARGS)
1.74 kristaps 860: {
861:
1.76 kristaps 862: if (NULL == r->last) {
1.128 kristaps 863: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.76 kristaps 864: return(ROFF_IGN);
865: }
866:
1.82 kristaps 867: switch (r->last->tok) {
868: case (ROFF_el):
869: /* FALLTHROUGH */
870: case (ROFF_ie):
871: /* FALLTHROUGH */
872: case (ROFF_if):
873: break;
874: default:
1.128 kristaps 875: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.75 kristaps 876: return(ROFF_IGN);
877: }
878:
1.76 kristaps 879: if (r->last->endspan > -1) {
1.128 kristaps 880: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.76 kristaps 881: return(ROFF_IGN);
882: }
883:
884: if ((*bufp)[pos])
1.128 kristaps 885: mandoc_msg(MANDOCERR_ARGSLOST, r->parse, ln, pos, NULL);
1.76 kristaps 886:
1.75 kristaps 887: roffnode_pop(r);
1.76 kristaps 888: roffnode_cleanscope(r);
889: return(ROFF_IGN);
890: }
891:
1.75 kristaps 892:
1.76 kristaps 893: /* ARGSUSED */
894: static enum rofferr
1.80 kristaps 895: roff_block(ROFF_ARGS)
1.76 kristaps 896: {
1.78 kristaps 897: int sv;
898: size_t sz;
1.106 kristaps 899: char *name;
900:
901: name = NULL;
1.76 kristaps 902:
1.106 kristaps 903: if (ROFF_ig != tok) {
904: if ('\0' == (*bufp)[pos]) {
1.128 kristaps 905: mandoc_msg(MANDOCERR_NOARGS, r->parse, ln, ppos, NULL);
1.106 kristaps 906: return(ROFF_IGN);
907: }
1.107 kristaps 908:
909: /*
910: * Re-write `de1', since we don't really care about
911: * groff's strange compatibility mode, into `de'.
912: */
913:
1.106 kristaps 914: if (ROFF_de1 == tok)
915: tok = ROFF_de;
916: if (ROFF_de == tok)
917: name = *bufp + pos;
918: else
1.128 kristaps 919: mandoc_msg(MANDOCERR_REQUEST, r->parse, ln, ppos,
1.106 kristaps 920: roffs[tok].name);
1.107 kristaps 921:
1.131 schwarze 922: while ((*bufp)[pos] && ! isspace((unsigned char)(*bufp)[pos]))
1.80 kristaps 923: pos++;
1.107 kristaps 924:
1.131 schwarze 925: while (isspace((unsigned char)(*bufp)[pos]))
1.106 kristaps 926: (*bufp)[pos++] = '\0';
1.80 kristaps 927: }
928:
1.106 kristaps 929: roffnode_push(r, tok, name, ln, ppos);
930:
931: /*
932: * At the beginning of a `de' macro, clear the existing string
933: * with the same name, if there is one. New content will be
934: * added from roff_block_text() in multiline mode.
935: */
1.107 kristaps 936:
1.106 kristaps 937: if (ROFF_de == tok)
1.108 schwarze 938: roff_setstr(r, name, "", 0);
1.76 kristaps 939:
1.79 kristaps 940: if ('\0' == (*bufp)[pos])
1.78 kristaps 941: return(ROFF_IGN);
942:
1.107 kristaps 943: /* If present, process the custom end-of-line marker. */
944:
1.78 kristaps 945: sv = pos;
1.131 schwarze 946: while ((*bufp)[pos] && ! isspace((unsigned char)(*bufp)[pos]))
1.78 kristaps 947: pos++;
948:
949: /*
950: * Note: groff does NOT like escape characters in the input.
951: * Instead of detecting this, we're just going to let it fly and
952: * to hell with it.
953: */
954:
955: assert(pos > sv);
956: sz = (size_t)(pos - sv);
957:
1.79 kristaps 958: if (1 == sz && '.' == (*bufp)[sv])
959: return(ROFF_IGN);
960:
1.98 schwarze 961: r->last->end = mandoc_malloc(sz + 1);
1.78 kristaps 962:
963: memcpy(r->last->end, *bufp + sv, sz);
964: r->last->end[(int)sz] = '\0';
965:
1.77 kristaps 966: if ((*bufp)[pos])
1.128 kristaps 967: mandoc_msg(MANDOCERR_ARGSLOST, r->parse, ln, pos, NULL);
1.74 kristaps 968:
1.78 kristaps 969: return(ROFF_IGN);
970: }
971:
972:
973: /* ARGSUSED */
974: static enum rofferr
1.80 kristaps 975: roff_block_sub(ROFF_ARGS)
1.79 kristaps 976: {
977: enum rofft t;
978: int i, j;
979:
980: /*
981: * First check whether a custom macro exists at this level. If
982: * it does, then check against it. This is some of groff's
983: * stranger behaviours. If we encountered a custom end-scope
984: * tag and that tag also happens to be a "real" macro, then we
985: * need to try interpreting it again as a real macro. If it's
986: * not, then return ignore. Else continue.
987: */
988:
989: if (r->last->end) {
1.130 kristaps 990: for (i = pos, j = 0; r->last->end[j]; j++, i++)
1.79 kristaps 991: if ((*bufp)[i] != r->last->end[j])
992: break;
993:
994: if ('\0' == r->last->end[j] &&
995: ('\0' == (*bufp)[i] ||
996: ' ' == (*bufp)[i] ||
997: '\t' == (*bufp)[i])) {
998: roffnode_pop(r);
999: roffnode_cleanscope(r);
1000:
1.130 kristaps 1001: while (' ' == (*bufp)[i] || '\t' == (*bufp)[i])
1002: i++;
1003:
1004: pos = i;
1.106 kristaps 1005: if (ROFF_MAX != roff_parse(r, *bufp, &pos))
1.79 kristaps 1006: return(ROFF_RERUN);
1007: return(ROFF_IGN);
1008: }
1009: }
1010:
1011: /*
1012: * If we have no custom end-query or lookup failed, then try
1013: * pulling it out of the hashtable.
1014: */
1015:
1.137 schwarze 1016: t = roff_parse(r, *bufp, &pos);
1.79 kristaps 1017:
1.106 kristaps 1018: /*
1019: * Macros other than block-end are only significant
1020: * in `de' blocks; elsewhere, simply throw them away.
1021: */
1022: if (ROFF_cblock != t) {
1023: if (ROFF_de == tok)
1024: roff_setstr(r, r->last->name, *bufp + ppos, 1);
1.79 kristaps 1025: return(ROFF_IGN);
1.106 kristaps 1026: }
1.79 kristaps 1027:
1028: assert(roffs[t].proc);
1.90 kristaps 1029: return((*roffs[t].proc)(r, t, bufp, szp,
1030: ln, ppos, pos, offs));
1.79 kristaps 1031: }
1032:
1033:
1034: /* ARGSUSED */
1035: static enum rofferr
1.80 kristaps 1036: roff_block_text(ROFF_ARGS)
1.78 kristaps 1037: {
1038:
1.106 kristaps 1039: if (ROFF_de == tok)
1040: roff_setstr(r, r->last->name, *bufp + pos, 1);
1041:
1.78 kristaps 1042: return(ROFF_IGN);
1043: }
1044:
1045:
1046: /* ARGSUSED */
1047: static enum rofferr
1.82 kristaps 1048: roff_cond_sub(ROFF_ARGS)
1049: {
1050: enum rofft t;
1051: enum roffrule rr;
1.139 kristaps 1052: char *ep;
1.82 kristaps 1053:
1054: rr = r->last->rule;
1.139 kristaps 1055: roffnode_cleanscope(r);
1.177 schwarze 1056: t = roff_parse(r, *bufp, &pos);
1.82 kristaps 1057:
1.139 kristaps 1058: /*
1.177 schwarze 1059: * Fully handle known macros when they are structurally
1060: * required or when the conditional evaluated to true.
1.87 kristaps 1061: */
1062:
1.177 schwarze 1063: if ((ROFF_MAX != t) &&
1064: (ROFF_ccond == t || ROFFRULE_ALLOW == rr ||
1065: ROFFMAC_STRUCT & roffs[t].flags)) {
1066: assert(roffs[t].proc);
1067: return((*roffs[t].proc)(r, t, bufp, szp,
1068: ln, ppos, pos, offs));
1069: }
1.144 kristaps 1070:
1.177 schwarze 1071: /* Always check for the closing delimiter `\}'. */
1.144 kristaps 1072:
1.177 schwarze 1073: ep = &(*bufp)[pos];
1074: while (NULL != (ep = strchr(ep, '\\'))) {
1075: if ('}' != *(++ep))
1076: continue;
1.82 kristaps 1077:
1.177 schwarze 1078: /*
1079: * If we're at the end of line, then just chop
1080: * off the \} and resize the buffer.
1081: * If we aren't, then convert it to spaces.
1082: */
1.139 kristaps 1083:
1.177 schwarze 1084: if ('\0' == *(ep + 1)) {
1085: *--ep = '\0';
1086: *szp -= 2;
1087: } else
1088: *(ep - 1) = *ep = ' ';
1.82 kristaps 1089:
1.177 schwarze 1090: roff_ccond(r, ROFF_ccond, bufp, szp,
1091: ln, pos, pos + 2, offs);
1092: break;
1093: }
1094: return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
1.82 kristaps 1095: }
1096:
1097: /* ARGSUSED */
1098: static enum rofferr
1099: roff_cond_text(ROFF_ARGS)
1.78 kristaps 1100: {
1.140 kristaps 1101: char *ep;
1.82 kristaps 1102: enum roffrule rr;
1103:
1104: rr = r->last->rule;
1.140 kristaps 1105: roffnode_cleanscope(r);
1.82 kristaps 1106:
1.140 kristaps 1107: ep = &(*bufp)[pos];
1108: for ( ; NULL != (ep = strchr(ep, '\\')); ep++) {
1109: ep++;
1110: if ('}' != *ep)
1111: continue;
1112: *ep = '&';
1113: roff_ccond(r, ROFF_ccond, bufp, szp,
1114: ln, pos, pos + 2, offs);
1.78 kristaps 1115: }
1.82 kristaps 1116: return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
1.74 kristaps 1117: }
1118:
1.88 kristaps 1119: static enum roffrule
1120: roff_evalcond(const char *v, int *pos)
1121: {
1122:
1123: switch (v[*pos]) {
1124: case ('n'):
1125: (*pos)++;
1126: return(ROFFRULE_ALLOW);
1127: case ('e'):
1128: /* FALLTHROUGH */
1129: case ('o'):
1130: /* FALLTHROUGH */
1131: case ('t'):
1132: (*pos)++;
1133: return(ROFFRULE_DENY);
1134: default:
1135: break;
1136: }
1137:
1138: while (v[*pos] && ' ' != v[*pos])
1139: (*pos)++;
1140: return(ROFFRULE_DENY);
1141: }
1142:
1.75 kristaps 1143: /* ARGSUSED */
1.74 kristaps 1144: static enum rofferr
1.103 kristaps 1145: roff_line_ignore(ROFF_ARGS)
1.89 kristaps 1146: {
1.123 schwarze 1147:
1.89 kristaps 1148: return(ROFF_IGN);
1149: }
1150:
1.104 kristaps 1151: /* ARGSUSED */
1152: static enum rofferr
1.82 kristaps 1153: roff_cond(ROFF_ARGS)
1.74 kristaps 1154: {
1.173 schwarze 1155:
1156: roffnode_push(r, tok, NULL, ln, ppos);
1.74 kristaps 1157:
1.134 kristaps 1158: /*
1159: * An `.el' has no conditional body: it will consume the value
1160: * of the current rstack entry set in prior `ie' calls or
1161: * defaults to DENY.
1162: *
1163: * If we're not an `el', however, then evaluate the conditional.
1164: */
1.133 kristaps 1165:
1.173 schwarze 1166: r->last->rule = ROFF_el == tok ?
1.134 kristaps 1167: (r->rstackpos < 0 ?
1168: ROFFRULE_DENY : r->rstack[r->rstackpos--]) :
1169: roff_evalcond(*bufp, &pos);
1.77 kristaps 1170:
1.134 kristaps 1171: /*
1172: * An if-else will put the NEGATION of the current evaluated
1173: * conditional into the stack of rules.
1174: */
1175:
1.84 schwarze 1176: if (ROFF_ie == tok) {
1.134 kristaps 1177: if (r->rstackpos == RSTACK_MAX - 1) {
1178: mandoc_msg(MANDOCERR_MEM,
1179: r->parse, ln, ppos, NULL);
1180: return(ROFF_ERR);
1181: }
1182: r->rstack[++r->rstackpos] =
1183: ROFFRULE_DENY == r->last->rule ?
1184: ROFFRULE_ALLOW : ROFFRULE_DENY;
1.82 kristaps 1185: }
1.88 kristaps 1186:
1187: /* If the parent has false as its rule, then so do we. */
1188:
1.109 kristaps 1189: if (r->last->parent && ROFFRULE_DENY == r->last->parent->rule)
1.84 schwarze 1190: r->last->rule = ROFFRULE_DENY;
1.88 kristaps 1191:
1192: /*
1.173 schwarze 1193: * Determine scope.
1194: * If there is nothing on the line after the conditional,
1195: * not even whitespace, use next-line scope.
1.88 kristaps 1196: */
1.74 kristaps 1197:
1.173 schwarze 1198: if ('\0' == (*bufp)[pos]) {
1199: r->last->endspan = 2;
1200: goto out;
1201: }
1202:
1203: while (' ' == (*bufp)[pos])
1204: pos++;
1205:
1206: /* An opening brace requests multiline scope. */
1.75 kristaps 1207:
1208: if ('\\' == (*bufp)[pos] && '{' == (*bufp)[pos + 1]) {
1209: r->last->endspan = -1;
1210: pos += 2;
1.173 schwarze 1211: goto out;
1.109 kristaps 1212: }
1.74 kristaps 1213:
1.77 kristaps 1214: /*
1.173 schwarze 1215: * Anything else following the conditional causes
1216: * single-line scope. Warn if the scope contains
1217: * nothing but trailing whitespace.
1.77 kristaps 1218: */
1219:
1.75 kristaps 1220: if ('\0' == (*bufp)[pos])
1.173 schwarze 1221: mandoc_msg(MANDOCERR_NOARGS, r->parse, ln, ppos, NULL);
1.77 kristaps 1222:
1.173 schwarze 1223: r->last->endspan = 1;
1.74 kristaps 1224:
1.173 schwarze 1225: out:
1.75 kristaps 1226: *offs = pos;
1227: return(ROFF_RERUN);
1.83 schwarze 1228: }
1229:
1230:
1231: /* ARGSUSED */
1232: static enum rofferr
1.92 schwarze 1233: roff_ds(ROFF_ARGS)
1234: {
1.96 kristaps 1235: char *name, *string;
1236:
1237: /*
1238: * A symbol is named by the first word following the macro
1239: * invocation up to a space. Its value is anything after the
1240: * name's trailing whitespace and optional double-quote. Thus,
1241: *
1242: * [.ds foo "bar " ]
1243: *
1244: * will have `bar " ' as its value.
1245: */
1.92 schwarze 1246:
1.121 schwarze 1247: string = *bufp + pos;
1248: name = roff_getname(r, &string, ln, pos);
1.92 schwarze 1249: if ('\0' == *name)
1250: return(ROFF_IGN);
1251:
1.121 schwarze 1252: /* Read past initial double-quote. */
1253: if ('"' == *string)
1.92 schwarze 1254: string++;
1255:
1.96 kristaps 1256: /* The rest is the value. */
1.106 kristaps 1257: roff_setstr(r, name, string, 0);
1.92 schwarze 1258: return(ROFF_IGN);
1259: }
1260:
1.147 kristaps 1261: int
1262: roff_regisset(const struct roff *r, enum regs reg)
1263: {
1264:
1265: return(r->regs[(int)reg].set);
1266: }
1267:
1268: unsigned int
1269: roff_regget(const struct roff *r, enum regs reg)
1270: {
1271:
1272: return(r->regs[(int)reg].u);
1273: }
1274:
1275: void
1276: roff_regunset(struct roff *r, enum regs reg)
1277: {
1278:
1279: r->regs[(int)reg].set = 0;
1280: }
1.92 schwarze 1281:
1282: /* ARGSUSED */
1283: static enum rofferr
1.89 kristaps 1284: roff_nr(ROFF_ARGS)
1.83 schwarze 1285: {
1.121 schwarze 1286: const char *key;
1287: char *val;
1.138 kristaps 1288: int iv;
1.89 kristaps 1289:
1.121 schwarze 1290: val = *bufp + pos;
1291: key = roff_getname(r, &val, ln, pos);
1.89 kristaps 1292:
1293: if (0 == strcmp(key, "nS")) {
1.147 kristaps 1294: r->regs[(int)REG_nS].set = 1;
1.149 kristaps 1295: if ((iv = mandoc_strntoi(val, strlen(val), 10)) >= 0)
1.147 kristaps 1296: r->regs[(int)REG_nS].u = (unsigned)iv;
1.138 kristaps 1297: else
1.147 kristaps 1298: r->regs[(int)REG_nS].u = 0u;
1.109 kristaps 1299: }
1300:
1.122 schwarze 1301: return(ROFF_IGN);
1302: }
1303:
1304: /* ARGSUSED */
1305: static enum rofferr
1306: roff_rm(ROFF_ARGS)
1307: {
1308: const char *name;
1309: char *cp;
1310:
1311: cp = *bufp + pos;
1312: while ('\0' != *cp) {
1.127 kristaps 1313: name = roff_getname(r, &cp, ln, (int)(cp - *bufp));
1.122 schwarze 1314: if ('\0' != *name)
1315: roff_setstr(r, name, NULL, 0);
1316: }
1.178 ! schwarze 1317: return(ROFF_IGN);
! 1318: }
! 1319:
! 1320: /* ARGSUSED */
! 1321: static enum rofferr
! 1322: roff_it(ROFF_ARGS)
! 1323: {
! 1324: char *cp;
! 1325: size_t len;
! 1326: int iv;
! 1327:
! 1328: /* Parse the number of lines. */
! 1329: cp = *bufp + pos;
! 1330: len = strcspn(cp, " \t");
! 1331: cp[len] = '\0';
! 1332: if ((iv = mandoc_strntoi(cp, len, 10)) <= 0) {
! 1333: mandoc_msg(MANDOCERR_NUMERIC, r->parse,
! 1334: ln, ppos, *bufp + 1);
! 1335: return(ROFF_IGN);
! 1336: }
! 1337: cp += len + 1;
! 1338:
! 1339: /* Arm the input line trap. */
! 1340: roffit_lines = iv;
! 1341: roffit_macro = mandoc_strdup(cp);
1.109 kristaps 1342: return(ROFF_IGN);
1.175 schwarze 1343: }
1344:
1345: /* ARGSUSED */
1346: static enum rofferr
1347: roff_Dd(ROFF_ARGS)
1348: {
1349: const char *const *cp;
1350:
1351: if (MPARSE_MDOC != r->parsetype)
1352: for (cp = __mdoc_reserved; *cp; cp++)
1353: roff_setstr(r, *cp, NULL, 0);
1354:
1355: return(ROFF_CONT);
1356: }
1357:
1358: /* ARGSUSED */
1359: static enum rofferr
1360: roff_TH(ROFF_ARGS)
1361: {
1362: const char *const *cp;
1363:
1364: if (MPARSE_MDOC != r->parsetype)
1365: for (cp = __man_reserved; *cp; cp++)
1366: roff_setstr(r, *cp, NULL, 0);
1367:
1368: return(ROFF_CONT);
1.109 kristaps 1369: }
1370:
1371: /* ARGSUSED */
1372: static enum rofferr
1373: roff_TE(ROFF_ARGS)
1374: {
1375:
1376: if (NULL == r->tbl)
1.128 kristaps 1377: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.115 kristaps 1378: else
1.151 kristaps 1379: tbl_end(&r->tbl);
1.109 kristaps 1380:
1.112 kristaps 1381: return(ROFF_IGN);
1382: }
1383:
1384: /* ARGSUSED */
1385: static enum rofferr
1386: roff_T_(ROFF_ARGS)
1387: {
1388:
1389: if (NULL == r->tbl)
1.128 kristaps 1390: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.112 kristaps 1391: else
1.116 kristaps 1392: tbl_restart(ppos, ln, r->tbl);
1.112 kristaps 1393:
1.109 kristaps 1394: return(ROFF_IGN);
1395: }
1396:
1.156 kristaps 1397: #if 0
1398: static int
1.151 kristaps 1399: roff_closeeqn(struct roff *r)
1400: {
1401:
1402: return(r->eqn && ROFF_EQN == eqn_end(&r->eqn) ? 1 : 0);
1403: }
1.156 kristaps 1404: #endif
1.151 kristaps 1405:
1.156 kristaps 1406: static void
1.151 kristaps 1407: roff_openeqn(struct roff *r, const char *name, int line,
1408: int offs, const char *buf)
1.125 kristaps 1409: {
1.151 kristaps 1410: struct eqn_node *e;
1411: int poff;
1.125 kristaps 1412:
1413: assert(NULL == r->eqn);
1.151 kristaps 1414: e = eqn_alloc(name, offs, line, r->parse);
1.125 kristaps 1415:
1416: if (r->last_eqn)
1417: r->last_eqn->next = e;
1418: else
1419: r->first_eqn = r->last_eqn = e;
1420:
1421: r->eqn = r->last_eqn = e;
1.151 kristaps 1422:
1423: if (buf) {
1424: poff = 0;
1425: eqn_read(&r->eqn, line, buf, offs, &poff);
1426: }
1427: }
1428:
1429: /* ARGSUSED */
1430: static enum rofferr
1431: roff_EQ(ROFF_ARGS)
1432: {
1433:
1434: roff_openeqn(r, *bufp + pos, ln, ppos, NULL);
1.125 kristaps 1435: return(ROFF_IGN);
1436: }
1437:
1438: /* ARGSUSED */
1439: static enum rofferr
1440: roff_EN(ROFF_ARGS)
1441: {
1442:
1.128 kristaps 1443: mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
1.125 kristaps 1444: return(ROFF_IGN);
1445: }
1446:
1447: /* ARGSUSED */
1448: static enum rofferr
1.109 kristaps 1449: roff_TS(ROFF_ARGS)
1450: {
1.176 schwarze 1451: struct tbl_node *tbl;
1.89 kristaps 1452:
1.115 kristaps 1453: if (r->tbl) {
1.128 kristaps 1454: mandoc_msg(MANDOCERR_SCOPEBROKEN, r->parse, ln, ppos, NULL);
1.151 kristaps 1455: tbl_end(&r->tbl);
1.115 kristaps 1456: }
1.83 schwarze 1457:
1.176 schwarze 1458: tbl = tbl_alloc(ppos, ln, r->parse);
1.113 kristaps 1459:
1460: if (r->last_tbl)
1.176 schwarze 1461: r->last_tbl->next = tbl;
1.113 kristaps 1462: else
1.176 schwarze 1463: r->first_tbl = r->last_tbl = tbl;
1.113 kristaps 1464:
1.176 schwarze 1465: r->tbl = r->last_tbl = tbl;
1.83 schwarze 1466: return(ROFF_IGN);
1.92 schwarze 1467: }
1468:
1.105 kristaps 1469: /* ARGSUSED */
1470: static enum rofferr
1.174 kristaps 1471: roff_cc(ROFF_ARGS)
1472: {
1473: const char *p;
1474:
1475: p = *bufp + pos;
1476:
1477: if ('\0' == *p || '.' == (r->control = *p++))
1478: r->control = 0;
1479:
1480: if ('\0' != *p)
1481: mandoc_msg(MANDOCERR_ARGCOUNT, r->parse, ln, ppos, NULL);
1482:
1483: return(ROFF_IGN);
1484: }
1485:
1486: /* ARGSUSED */
1487: static enum rofferr
1.164 kristaps 1488: roff_tr(ROFF_ARGS)
1489: {
1490: const char *p, *first, *second;
1491: size_t fsz, ssz;
1492: enum mandoc_esc esc;
1493:
1494: p = *bufp + pos;
1495:
1496: if ('\0' == *p) {
1497: mandoc_msg(MANDOCERR_ARGCOUNT, r->parse, ln, ppos, NULL);
1498: return(ROFF_IGN);
1499: }
1500:
1501: while ('\0' != *p) {
1502: fsz = ssz = 1;
1503:
1504: first = p++;
1505: if ('\\' == *first) {
1506: esc = mandoc_escape(&p, NULL, NULL);
1507: if (ESCAPE_ERROR == esc) {
1508: mandoc_msg
1509: (MANDOCERR_BADESCAPE, r->parse,
1510: ln, (int)(p - *bufp), NULL);
1511: return(ROFF_IGN);
1512: }
1513: fsz = (size_t)(p - first);
1514: }
1515:
1516: second = p++;
1517: if ('\\' == *second) {
1518: esc = mandoc_escape(&p, NULL, NULL);
1519: if (ESCAPE_ERROR == esc) {
1520: mandoc_msg
1521: (MANDOCERR_BADESCAPE, r->parse,
1522: ln, (int)(p - *bufp), NULL);
1523: return(ROFF_IGN);
1524: }
1525: ssz = (size_t)(p - second);
1.165 kristaps 1526: } else if ('\0' == *second) {
1.164 kristaps 1527: mandoc_msg(MANDOCERR_ARGCOUNT, r->parse,
1528: ln, (int)(p - *bufp), NULL);
1529: second = " ";
1.165 kristaps 1530: p--;
1.164 kristaps 1531: }
1532:
1.167 kristaps 1533: if (fsz > 1) {
1534: roff_setstrn(&r->xmbtab, first,
1535: fsz, second, ssz, 0);
1536: continue;
1537: }
1538:
1539: if (NULL == r->xtab)
1540: r->xtab = mandoc_calloc
1541: (128, sizeof(struct roffstr));
1542:
1543: free(r->xtab[(int)*first].p);
1544: r->xtab[(int)*first].p = mandoc_strndup(second, ssz);
1545: r->xtab[(int)*first].sz = ssz;
1.164 kristaps 1546: }
1547:
1548: return(ROFF_IGN);
1549: }
1550:
1551: /* ARGSUSED */
1552: static enum rofferr
1.105 kristaps 1553: roff_so(ROFF_ARGS)
1554: {
1555: char *name;
1556:
1.128 kristaps 1557: mandoc_msg(MANDOCERR_SO, r->parse, ln, ppos, NULL);
1.105 kristaps 1558:
1559: /*
1560: * Handle `so'. Be EXTREMELY careful, as we shouldn't be
1561: * opening anything that's not in our cwd or anything beneath
1562: * it. Thus, explicitly disallow traversing up the file-system
1563: * or using absolute paths.
1564: */
1565:
1566: name = *bufp + pos;
1567: if ('/' == *name || strstr(name, "../") || strstr(name, "/..")) {
1.128 kristaps 1568: mandoc_msg(MANDOCERR_SOPATH, r->parse, ln, pos, NULL);
1.105 kristaps 1569: return(ROFF_ERR);
1570: }
1571:
1572: *offs = pos;
1573: return(ROFF_SO);
1574: }
1.92 schwarze 1575:
1.106 kristaps 1576: /* ARGSUSED */
1577: static enum rofferr
1578: roff_userdef(ROFF_ARGS)
1.99 kristaps 1579: {
1.106 kristaps 1580: const char *arg[9];
1581: char *cp, *n1, *n2;
1.119 schwarze 1582: int i;
1.106 kristaps 1583:
1584: /*
1585: * Collect pointers to macro argument strings
1586: * and null-terminate them.
1587: */
1588: cp = *bufp + pos;
1.119 schwarze 1589: for (i = 0; i < 9; i++)
1.120 schwarze 1590: arg[i] = '\0' == *cp ? "" :
1.136 kristaps 1591: mandoc_getarg(r->parse, &cp, ln, &pos);
1.99 kristaps 1592:
1.106 kristaps 1593: /*
1594: * Expand macro arguments.
1.99 kristaps 1595: */
1.106 kristaps 1596: *szp = 0;
1597: n1 = cp = mandoc_strdup(r->current_string);
1598: while (NULL != (cp = strstr(cp, "\\$"))) {
1599: i = cp[2] - '1';
1600: if (0 > i || 8 < i) {
1601: /* Not an argument invocation. */
1602: cp += 2;
1603: continue;
1604: }
1605:
1606: *szp = strlen(n1) - 3 + strlen(arg[i]) + 1;
1607: n2 = mandoc_malloc(*szp);
1608:
1609: strlcpy(n2, n1, (size_t)(cp - n1 + 1));
1610: strlcat(n2, arg[i], *szp);
1611: strlcat(n2, cp + 3, *szp);
1612:
1613: cp = n2 + (cp - n1);
1614: free(n1);
1615: n1 = n2;
1.99 kristaps 1616: }
1617:
1.106 kristaps 1618: /*
1619: * Replace the macro invocation
1620: * by the expanded macro.
1621: */
1622: free(*bufp);
1623: *bufp = n1;
1624: if (0 == *szp)
1625: *szp = strlen(*bufp) + 1;
1626:
1627: return(*szp > 1 && '\n' == (*bufp)[(int)*szp - 2] ?
1628: ROFF_REPARSE : ROFF_APPEND);
1.99 kristaps 1629: }
1.121 schwarze 1630:
1631: static char *
1632: roff_getname(struct roff *r, char **cpp, int ln, int pos)
1633: {
1634: char *name, *cp;
1635:
1636: name = *cpp;
1637: if ('\0' == *name)
1638: return(name);
1639:
1640: /* Read until end of name. */
1641: for (cp = name; '\0' != *cp && ' ' != *cp; cp++) {
1642: if ('\\' != *cp)
1643: continue;
1644: cp++;
1645: if ('\\' == *cp)
1646: continue;
1.128 kristaps 1647: mandoc_msg(MANDOCERR_NAMESC, r->parse, ln, pos, NULL);
1.121 schwarze 1648: *cp = '\0';
1649: name = cp;
1650: }
1651:
1652: /* Nil-terminate name. */
1653: if ('\0' != *cp)
1654: *(cp++) = '\0';
1655:
1656: /* Read past spaces. */
1657: while (' ' == *cp)
1658: cp++;
1659:
1660: *cpp = cp;
1661: return(name);
1662: }
1663:
1.106 kristaps 1664: /*
1665: * Store *string into the user-defined string called *name.
1666: * In multiline mode, append to an existing entry and append '\n';
1667: * else replace the existing entry, if there is one.
1668: * To clear an existing entry, call with (*r, *name, NULL, 0).
1669: */
1.94 kristaps 1670: static void
1.106 kristaps 1671: roff_setstr(struct roff *r, const char *name, const char *string,
1672: int multiline)
1.92 schwarze 1673: {
1.164 kristaps 1674:
1675: roff_setstrn(&r->strtab, name, strlen(name), string,
1676: string ? strlen(string) : 0, multiline);
1677: }
1678:
1679: static void
1.166 kristaps 1680: roff_setstrn(struct roffkv **r, const char *name, size_t namesz,
1.164 kristaps 1681: const char *string, size_t stringsz, int multiline)
1682: {
1.166 kristaps 1683: struct roffkv *n;
1.164 kristaps 1684: char *c;
1685: int i;
1686: size_t oldch, newch;
1.92 schwarze 1687:
1.106 kristaps 1688: /* Search for an existing string with the same name. */
1.164 kristaps 1689: n = *r;
1690:
1.166 kristaps 1691: while (n && strcmp(name, n->key.p))
1.92 schwarze 1692: n = n->next;
1.94 kristaps 1693:
1694: if (NULL == n) {
1.106 kristaps 1695: /* Create a new string table entry. */
1.166 kristaps 1696: n = mandoc_malloc(sizeof(struct roffkv));
1697: n->key.p = mandoc_strndup(name, namesz);
1698: n->key.sz = namesz;
1699: n->val.p = NULL;
1700: n->val.sz = 0;
1.164 kristaps 1701: n->next = *r;
1702: *r = n;
1.106 kristaps 1703: } else if (0 == multiline) {
1704: /* In multiline mode, append; else replace. */
1.166 kristaps 1705: free(n->val.p);
1706: n->val.p = NULL;
1707: n->val.sz = 0;
1.106 kristaps 1708: }
1709:
1710: if (NULL == string)
1711: return;
1712:
1713: /*
1714: * One additional byte for the '\n' in multiline mode,
1715: * and one for the terminating '\0'.
1716: */
1.164 kristaps 1717: newch = stringsz + (multiline ? 2u : 1u);
1718:
1.166 kristaps 1719: if (NULL == n->val.p) {
1720: n->val.p = mandoc_malloc(newch);
1721: *n->val.p = '\0';
1.106 kristaps 1722: oldch = 0;
1723: } else {
1.166 kristaps 1724: oldch = n->val.sz;
1725: n->val.p = mandoc_realloc(n->val.p, oldch + newch);
1.106 kristaps 1726: }
1727:
1728: /* Skip existing content in the destination buffer. */
1.166 kristaps 1729: c = n->val.p + (int)oldch;
1.106 kristaps 1730:
1731: /* Append new content to the destination buffer. */
1.164 kristaps 1732: i = 0;
1733: while (i < (int)stringsz) {
1.106 kristaps 1734: /*
1735: * Rudimentary roff copy mode:
1736: * Handle escaped backslashes.
1737: */
1.164 kristaps 1738: if ('\\' == string[i] && '\\' == string[i + 1])
1739: i++;
1740: *c++ = string[i++];
1.106 kristaps 1741: }
1.94 kristaps 1742:
1.106 kristaps 1743: /* Append terminating bytes. */
1744: if (multiline)
1745: *c++ = '\n';
1.163 kristaps 1746:
1.106 kristaps 1747: *c = '\0';
1.166 kristaps 1748: n->val.sz = (int)(c - n->val.p);
1.92 schwarze 1749: }
1750:
1.94 kristaps 1751: static const char *
1752: roff_getstrn(const struct roff *r, const char *name, size_t len)
1.92 schwarze 1753: {
1.166 kristaps 1754: const struct roffkv *n;
1.92 schwarze 1755:
1.164 kristaps 1756: for (n = r->strtab; n; n = n->next)
1.166 kristaps 1757: if (0 == strncmp(name, n->key.p, len) &&
1758: '\0' == n->key.p[(int)len])
1759: return(n->val.p);
1.94 kristaps 1760:
1.157 kristaps 1761: return(NULL);
1.92 schwarze 1762: }
1763:
1.94 kristaps 1764: static void
1.167 kristaps 1765: roff_freestr(struct roffkv *r)
1.92 schwarze 1766: {
1.166 kristaps 1767: struct roffkv *n, *nn;
1.92 schwarze 1768:
1.167 kristaps 1769: for (n = r; n; n = nn) {
1.166 kristaps 1770: free(n->key.p);
1771: free(n->val.p);
1.92 schwarze 1772: nn = n->next;
1773: free(n);
1774: }
1.114 kristaps 1775: }
1776:
1777: const struct tbl_span *
1778: roff_span(const struct roff *r)
1779: {
1780:
1781: return(r->tbl ? tbl_span(r->tbl) : NULL);
1.125 kristaps 1782: }
1783:
1784: const struct eqn *
1785: roff_eqn(const struct roff *r)
1786: {
1787:
1788: return(r->last_eqn ? &r->last_eqn->eqn : NULL);
1.164 kristaps 1789: }
1790:
1791: /*
1792: * Duplicate an input string, making the appropriate character
1793: * conversations (as stipulated by `tr') along the way.
1794: * Returns a heap-allocated string with all the replacements made.
1795: */
1796: char *
1797: roff_strdup(const struct roff *r, const char *p)
1798: {
1.166 kristaps 1799: const struct roffkv *cp;
1.164 kristaps 1800: char *res;
1801: const char *pp;
1802: size_t ssz, sz;
1803: enum mandoc_esc esc;
1804:
1.167 kristaps 1805: if (NULL == r->xmbtab && NULL == r->xtab)
1.164 kristaps 1806: return(mandoc_strdup(p));
1807: else if ('\0' == *p)
1808: return(mandoc_strdup(""));
1809:
1810: /*
1811: * Step through each character looking for term matches
1812: * (remember that a `tr' can be invoked with an escape, which is
1813: * a glyph but the escape is multi-character).
1814: * We only do this if the character hash has been initialised
1815: * and the string is >0 length.
1816: */
1817:
1818: res = NULL;
1819: ssz = 0;
1820:
1821: while ('\0' != *p) {
1.167 kristaps 1822: if ('\\' != *p && r->xtab && r->xtab[(int)*p].p) {
1823: sz = r->xtab[(int)*p].sz;
1824: res = mandoc_realloc(res, ssz + sz + 1);
1825: memcpy(res + ssz, r->xtab[(int)*p].p, sz);
1826: ssz += sz;
1827: p++;
1828: continue;
1829: } else if ('\\' != *p) {
1830: res = mandoc_realloc(res, ssz + 2);
1831: res[ssz++] = *p++;
1832: continue;
1833: }
1834:
1.164 kristaps 1835: /* Search for term matches. */
1.167 kristaps 1836: for (cp = r->xmbtab; cp; cp = cp->next)
1.166 kristaps 1837: if (0 == strncmp(p, cp->key.p, cp->key.sz))
1.164 kristaps 1838: break;
1839:
1840: if (NULL != cp) {
1841: /*
1842: * A match has been found.
1843: * Append the match to the array and move
1844: * forward by its keysize.
1845: */
1.166 kristaps 1846: res = mandoc_realloc
1847: (res, ssz + cp->val.sz + 1);
1848: memcpy(res + ssz, cp->val.p, cp->val.sz);
1849: ssz += cp->val.sz;
1850: p += (int)cp->key.sz;
1.164 kristaps 1851: continue;
1852: }
1853:
1.167 kristaps 1854: /*
1855: * Handle escapes carefully: we need to copy
1856: * over just the escape itself, or else we might
1857: * do replacements within the escape itself.
1858: * Make sure to pass along the bogus string.
1859: */
1860: pp = p++;
1861: esc = mandoc_escape(&p, NULL, NULL);
1862: if (ESCAPE_ERROR == esc) {
1863: sz = strlen(pp);
1.164 kristaps 1864: res = mandoc_realloc(res, ssz + sz + 1);
1865: memcpy(res + ssz, pp, sz);
1.167 kristaps 1866: break;
1.164 kristaps 1867: }
1.167 kristaps 1868: /*
1869: * We bail out on bad escapes.
1870: * No need to warn: we already did so when
1871: * roff_res() was called.
1872: */
1873: sz = (int)(p - pp);
1874: res = mandoc_realloc(res, ssz + sz + 1);
1875: memcpy(res + ssz, pp, sz);
1876: ssz += sz;
1.164 kristaps 1877: }
1878:
1879: res[(int)ssz] = '\0';
1880: return(res);
1.174 kristaps 1881: }
1882:
1883: /*
1884: * Find out whether a line is a macro line or not.
1885: * If it is, adjust the current position and return one; if it isn't,
1886: * return zero and don't change the current position.
1887: * If the control character has been set with `.cc', then let that grain
1888: * precedence.
1889: * This is slighly contrary to groff, where using the non-breaking
1890: * control character when `cc' has been invoked will cause the
1891: * non-breaking macro contents to be printed verbatim.
1892: */
1893: int
1894: roff_getcontrol(const struct roff *r, const char *cp, int *ppos)
1895: {
1896: int pos;
1897:
1898: pos = *ppos;
1899:
1900: if (0 != r->control && cp[pos] == r->control)
1901: pos++;
1902: else if (0 != r->control)
1903: return(0);
1904: else if ('\\' == cp[pos] && '.' == cp[pos + 1])
1905: pos += 2;
1906: else if ('.' == cp[pos] || '\'' == cp[pos])
1907: pos++;
1908: else
1909: return(0);
1910:
1911: while (' ' == cp[pos] || '\t' == cp[pos])
1912: pos++;
1913:
1914: *ppos = pos;
1915: return(1);
1.74 kristaps 1916: }
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