Annotation of mandoc/eqn.c, Revision 1.72
1.72 ! schwarze 1: /* $Id: eqn.c,v 1.71 2017/06/26 20:09:04 schwarze Exp $ */
1.1 kristaps 2: /*
1.51 schwarze 3: * Copyright (c) 2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
1.64 schwarze 4: * Copyright (c) 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18: #include "config.h"
1.45 schwarze 19:
20: #include <sys/types.h>
1.1 kristaps 21:
22: #include <assert.h>
1.66 schwarze 23: #include <ctype.h>
1.19 kristaps 24: #include <limits.h>
1.1 kristaps 25: #include <stdio.h>
26: #include <stdlib.h>
27: #include <string.h>
28: #include <time.h>
29:
30: #include "mandoc.h"
1.39 schwarze 31: #include "mandoc_aux.h"
1.1 kristaps 32: #include "libmandoc.h"
33: #include "libroff.h"
34:
1.11 kristaps 35: #define EQN_NEST_MAX 128 /* maximum nesting of defines */
1.48 kristaps 36: #define STRNEQ(p1, sz1, p2, sz2) \
37: ((sz1) == (sz2) && 0 == strncmp((p1), (p2), (sz1)))
1.8 kristaps 38:
1.48 kristaps 39: enum eqn_tok {
40: EQN_TOK_DYAD = 0,
41: EQN_TOK_VEC,
42: EQN_TOK_UNDER,
43: EQN_TOK_BAR,
44: EQN_TOK_TILDE,
45: EQN_TOK_HAT,
46: EQN_TOK_DOT,
47: EQN_TOK_DOTDOT,
48: EQN_TOK_FWD,
49: EQN_TOK_BACK,
50: EQN_TOK_DOWN,
51: EQN_TOK_UP,
52: EQN_TOK_FAT,
53: EQN_TOK_ROMAN,
54: EQN_TOK_ITALIC,
55: EQN_TOK_BOLD,
56: EQN_TOK_SIZE,
57: EQN_TOK_SUB,
58: EQN_TOK_SUP,
59: EQN_TOK_SQRT,
60: EQN_TOK_OVER,
61: EQN_TOK_FROM,
62: EQN_TOK_TO,
63: EQN_TOK_BRACE_OPEN,
64: EQN_TOK_BRACE_CLOSE,
65: EQN_TOK_GSIZE,
66: EQN_TOK_GFONT,
67: EQN_TOK_MARK,
68: EQN_TOK_LINEUP,
69: EQN_TOK_LEFT,
70: EQN_TOK_RIGHT,
71: EQN_TOK_PILE,
72: EQN_TOK_LPILE,
73: EQN_TOK_RPILE,
74: EQN_TOK_CPILE,
75: EQN_TOK_MATRIX,
76: EQN_TOK_CCOL,
77: EQN_TOK_LCOL,
78: EQN_TOK_RCOL,
79: EQN_TOK_DELIM,
80: EQN_TOK_DEFINE,
81: EQN_TOK_TDEFINE,
82: EQN_TOK_NDEFINE,
83: EQN_TOK_UNDEF,
84: EQN_TOK_ABOVE,
1.64 schwarze 85: EQN_TOK__MAX,
86: EQN_TOK_FUNC,
1.67 schwarze 87: EQN_TOK_QUOTED,
88: EQN_TOK_SYM,
1.64 schwarze 89: EQN_TOK_EOF
1.48 kristaps 90: };
91:
92: static const char *eqn_toks[EQN_TOK__MAX] = {
93: "dyad", /* EQN_TOK_DYAD */
94: "vec", /* EQN_TOK_VEC */
95: "under", /* EQN_TOK_UNDER */
96: "bar", /* EQN_TOK_BAR */
97: "tilde", /* EQN_TOK_TILDE */
98: "hat", /* EQN_TOK_HAT */
99: "dot", /* EQN_TOK_DOT */
100: "dotdot", /* EQN_TOK_DOTDOT */
101: "fwd", /* EQN_TOK_FWD * */
102: "back", /* EQN_TOK_BACK */
103: "down", /* EQN_TOK_DOWN */
104: "up", /* EQN_TOK_UP */
105: "fat", /* EQN_TOK_FAT */
106: "roman", /* EQN_TOK_ROMAN */
107: "italic", /* EQN_TOK_ITALIC */
108: "bold", /* EQN_TOK_BOLD */
109: "size", /* EQN_TOK_SIZE */
110: "sub", /* EQN_TOK_SUB */
111: "sup", /* EQN_TOK_SUP */
112: "sqrt", /* EQN_TOK_SQRT */
113: "over", /* EQN_TOK_OVER */
114: "from", /* EQN_TOK_FROM */
115: "to", /* EQN_TOK_TO */
116: "{", /* EQN_TOK_BRACE_OPEN */
117: "}", /* EQN_TOK_BRACE_CLOSE */
118: "gsize", /* EQN_TOK_GSIZE */
119: "gfont", /* EQN_TOK_GFONT */
120: "mark", /* EQN_TOK_MARK */
121: "lineup", /* EQN_TOK_LINEUP */
122: "left", /* EQN_TOK_LEFT */
123: "right", /* EQN_TOK_RIGHT */
124: "pile", /* EQN_TOK_PILE */
125: "lpile", /* EQN_TOK_LPILE */
126: "rpile", /* EQN_TOK_RPILE */
127: "cpile", /* EQN_TOK_CPILE */
128: "matrix", /* EQN_TOK_MATRIX */
129: "ccol", /* EQN_TOK_CCOL */
130: "lcol", /* EQN_TOK_LCOL */
131: "rcol", /* EQN_TOK_RCOL */
132: "delim", /* EQN_TOK_DELIM */
133: "define", /* EQN_TOK_DEFINE */
134: "tdefine", /* EQN_TOK_TDEFINE */
135: "ndefine", /* EQN_TOK_NDEFINE */
136: "undef", /* EQN_TOK_UNDEF */
137: "above", /* EQN_TOK_ABOVE */
1.20 kristaps 138: };
139:
1.64 schwarze 140: static const char *const eqn_func[] = {
141: "acos", "acsc", "and", "arc", "asec", "asin", "atan",
142: "cos", "cosh", "coth", "csc", "det", "exp", "for",
143: "if", "lim", "ln", "log", "max", "min",
144: "sec", "sin", "sinh", "tan", "tanh", "Im", "Re",
145: };
146:
1.27 kristaps 147: enum eqn_symt {
1.71 schwarze 148: EQNSYM_alpha = 0,
1.27 kristaps 149: EQNSYM_beta,
150: EQNSYM_chi,
151: EQNSYM_delta,
152: EQNSYM_epsilon,
153: EQNSYM_eta,
154: EQNSYM_gamma,
155: EQNSYM_iota,
156: EQNSYM_kappa,
157: EQNSYM_lambda,
158: EQNSYM_mu,
159: EQNSYM_nu,
160: EQNSYM_omega,
161: EQNSYM_omicron,
162: EQNSYM_phi,
163: EQNSYM_pi,
164: EQNSYM_ps,
165: EQNSYM_rho,
166: EQNSYM_sigma,
167: EQNSYM_tau,
168: EQNSYM_theta,
169: EQNSYM_upsilon,
170: EQNSYM_xi,
171: EQNSYM_zeta,
172: EQNSYM_DELTA,
173: EQNSYM_GAMMA,
174: EQNSYM_LAMBDA,
175: EQNSYM_OMEGA,
176: EQNSYM_PHI,
177: EQNSYM_PI,
178: EQNSYM_PSI,
179: EQNSYM_SIGMA,
180: EQNSYM_THETA,
181: EQNSYM_UPSILON,
182: EQNSYM_XI,
1.28 kristaps 183: EQNSYM_inter,
184: EQNSYM_union,
185: EQNSYM_prod,
186: EQNSYM_int,
187: EQNSYM_sum,
188: EQNSYM_grad,
189: EQNSYM_del,
190: EQNSYM_times,
191: EQNSYM_cdot,
192: EQNSYM_nothing,
193: EQNSYM_approx,
194: EQNSYM_prime,
195: EQNSYM_half,
196: EQNSYM_partial,
197: EQNSYM_inf,
198: EQNSYM_muchgreat,
199: EQNSYM_muchless,
200: EQNSYM_larrow,
201: EQNSYM_rarrow,
202: EQNSYM_pm,
203: EQNSYM_nequal,
204: EQNSYM_equiv,
205: EQNSYM_lessequal,
206: EQNSYM_moreequal,
1.58 schwarze 207: EQNSYM_minus,
1.27 kristaps 208: EQNSYM__MAX
209: };
210:
211: struct eqnsym {
1.48 kristaps 212: const char *str;
1.28 kristaps 213: const char *sym;
1.27 kristaps 214: };
215:
216: static const struct eqnsym eqnsyms[EQNSYM__MAX] = {
1.48 kristaps 217: { "alpha", "*a" }, /* EQNSYM_alpha */
218: { "beta", "*b" }, /* EQNSYM_beta */
219: { "chi", "*x" }, /* EQNSYM_chi */
220: { "delta", "*d" }, /* EQNSYM_delta */
221: { "epsilon", "*e" }, /* EQNSYM_epsilon */
222: { "eta", "*y" }, /* EQNSYM_eta */
223: { "gamma", "*g" }, /* EQNSYM_gamma */
224: { "iota", "*i" }, /* EQNSYM_iota */
225: { "kappa", "*k" }, /* EQNSYM_kappa */
226: { "lambda", "*l" }, /* EQNSYM_lambda */
227: { "mu", "*m" }, /* EQNSYM_mu */
228: { "nu", "*n" }, /* EQNSYM_nu */
229: { "omega", "*w" }, /* EQNSYM_omega */
230: { "omicron", "*o" }, /* EQNSYM_omicron */
231: { "phi", "*f" }, /* EQNSYM_phi */
232: { "pi", "*p" }, /* EQNSYM_pi */
233: { "psi", "*q" }, /* EQNSYM_psi */
234: { "rho", "*r" }, /* EQNSYM_rho */
235: { "sigma", "*s" }, /* EQNSYM_sigma */
236: { "tau", "*t" }, /* EQNSYM_tau */
237: { "theta", "*h" }, /* EQNSYM_theta */
238: { "upsilon", "*u" }, /* EQNSYM_upsilon */
239: { "xi", "*c" }, /* EQNSYM_xi */
240: { "zeta", "*z" }, /* EQNSYM_zeta */
241: { "DELTA", "*D" }, /* EQNSYM_DELTA */
242: { "GAMMA", "*G" }, /* EQNSYM_GAMMA */
243: { "LAMBDA", "*L" }, /* EQNSYM_LAMBDA */
244: { "OMEGA", "*W" }, /* EQNSYM_OMEGA */
245: { "PHI", "*F" }, /* EQNSYM_PHI */
246: { "PI", "*P" }, /* EQNSYM_PI */
247: { "PSI", "*Q" }, /* EQNSYM_PSI */
248: { "SIGMA", "*S" }, /* EQNSYM_SIGMA */
249: { "THETA", "*H" }, /* EQNSYM_THETA */
250: { "UPSILON", "*U" }, /* EQNSYM_UPSILON */
251: { "XI", "*C" }, /* EQNSYM_XI */
252: { "inter", "ca" }, /* EQNSYM_inter */
253: { "union", "cu" }, /* EQNSYM_union */
254: { "prod", "product" }, /* EQNSYM_prod */
255: { "int", "integral" }, /* EQNSYM_int */
256: { "sum", "sum" }, /* EQNSYM_sum */
257: { "grad", "gr" }, /* EQNSYM_grad */
258: { "del", "gr" }, /* EQNSYM_del */
259: { "times", "mu" }, /* EQNSYM_times */
260: { "cdot", "pc" }, /* EQNSYM_cdot */
261: { "nothing", "&" }, /* EQNSYM_nothing */
262: { "approx", "~~" }, /* EQNSYM_approx */
1.58 schwarze 263: { "prime", "fm" }, /* EQNSYM_prime */
1.48 kristaps 264: { "half", "12" }, /* EQNSYM_half */
265: { "partial", "pd" }, /* EQNSYM_partial */
266: { "inf", "if" }, /* EQNSYM_inf */
267: { ">>", ">>" }, /* EQNSYM_muchgreat */
268: { "<<", "<<" }, /* EQNSYM_muchless */
269: { "<-", "<-" }, /* EQNSYM_larrow */
270: { "->", "->" }, /* EQNSYM_rarrow */
271: { "+-", "+-" }, /* EQNSYM_pm */
272: { "!=", "!=" }, /* EQNSYM_nequal */
273: { "==", "==" }, /* EQNSYM_equiv */
274: { "<=", "<=" }, /* EQNSYM_lessequal */
275: { ">=", ">=" }, /* EQNSYM_moreequal */
1.58 schwarze 276: { "-", "mi" }, /* EQNSYM_minus */
1.27 kristaps 277: };
278:
1.71 schwarze 279: enum parse_mode {
280: MODE_QUOTED,
281: MODE_NOSUB,
282: MODE_SUB,
283: MODE_TOK
284: };
285:
1.57 schwarze 286: static struct eqn_box *eqn_box_alloc(struct eqn_node *, struct eqn_box *);
287: static void eqn_box_free(struct eqn_box *);
288: static struct eqn_box *eqn_box_makebinary(struct eqn_node *,
289: enum eqn_post, struct eqn_box *);
290: static void eqn_def(struct eqn_node *);
1.71 schwarze 291: static struct eqn_def *eqn_def_find(struct eqn_node *);
1.57 schwarze 292: static void eqn_delim(struct eqn_node *);
1.71 schwarze 293: static enum eqn_tok eqn_next(struct eqn_node *, enum parse_mode);
1.57 schwarze 294: static enum rofferr eqn_parse(struct eqn_node *, struct eqn_box *);
295: static void eqn_undef(struct eqn_node *);
296:
297:
1.1 kristaps 298: enum rofferr
1.40 schwarze 299: eqn_read(struct eqn_node **epp, int ln,
1.6 kristaps 300: const char *p, int pos, int *offs)
1.1 kristaps 301: {
1.8 kristaps 302: size_t sz;
303: struct eqn_node *ep;
1.12 kristaps 304: enum rofferr er;
305:
306: ep = *epp;
307:
308: /*
309: * If we're the terminating mark, unset our equation status and
310: * validate the full equation.
311: */
1.1 kristaps 312:
1.35 kristaps 313: if (0 == strncmp(p, ".EN", 3)) {
1.38 kristaps 314: er = eqn_end(epp);
1.35 kristaps 315: p += 3;
316: while (' ' == *p || '\t' == *p)
317: p++;
1.40 schwarze 318: if ('\0' == *p)
1.59 schwarze 319: return er;
1.43 schwarze 320: mandoc_vmsg(MANDOCERR_ARG_SKIP, ep->parse,
321: ln, pos, "EN %s", p);
1.59 schwarze 322: return er;
1.1 kristaps 323: }
324:
1.12 kristaps 325: /*
326: * Build up the full string, replacing all newlines with regular
327: * whitespace.
328: */
1.6 kristaps 329:
1.12 kristaps 330: sz = strlen(p + pos) + 1;
331: ep->data = mandoc_realloc(ep->data, ep->sz + sz + 1);
1.6 kristaps 332:
1.12 kristaps 333: /* First invocation: nil terminate the string. */
1.8 kristaps 334:
1.12 kristaps 335: if (0 == ep->sz)
336: *ep->data = '\0';
1.8 kristaps 337:
1.12 kristaps 338: ep->sz += sz;
339: strlcat(ep->data, p + pos, ep->sz + 1);
340: strlcat(ep->data, " ", ep->sz + 1);
1.59 schwarze 341: return ROFF_IGN;
1.11 kristaps 342: }
343:
1.1 kristaps 344: struct eqn_node *
1.55 schwarze 345: eqn_alloc(int pos, int line, struct mparse *parse)
1.1 kristaps 346: {
347: struct eqn_node *p;
348:
349: p = mandoc_calloc(1, sizeof(struct eqn_node));
1.36 kristaps 350:
1.5 kristaps 351: p->parse = parse;
1.12 kristaps 352: p->eqn.ln = line;
1.2 kristaps 353: p->eqn.pos = pos;
1.29 kristaps 354: p->gsize = EQN_DEFSIZE;
1.1 kristaps 355:
1.59 schwarze 356: return p;
1.1 kristaps 357: }
358:
1.48 kristaps 359: /*
360: * Find the key "key" of the give size within our eqn-defined values.
361: */
362: static struct eqn_def *
1.71 schwarze 363: eqn_def_find(struct eqn_node *ep)
1.1 kristaps 364: {
1.6 kristaps 365: int i;
1.1 kristaps 366:
1.48 kristaps 367: for (i = 0; i < (int)ep->defsz; i++)
368: if (ep->defs[i].keysz && STRNEQ(ep->defs[i].key,
1.71 schwarze 369: ep->defs[i].keysz, ep->start, ep->toksz))
1.59 schwarze 370: return &ep->defs[i];
1.6 kristaps 371:
1.59 schwarze 372: return NULL;
1.20 kristaps 373: }
374:
1.48 kristaps 375: /*
1.71 schwarze 376: * Parse a token from the input text. The modes are:
377: * MODE_QUOTED: Use *ep->start as the delimiter; the token ends
378: * before its next occurence. Do not interpret the token in any
379: * way and return EQN_TOK_QUOTED. All other modes behave like
380: * MODE_QUOTED when *ep->start is '"'.
381: * MODE_NOSUB: If *ep->start is a curly brace, the token ends after it;
382: * otherwise, it ends before the next whitespace or brace.
383: * Do not interpret the token and return EQN_TOK__MAX.
384: * MODE_SUB: Like MODE_NOSUB, but try to interpret the token as an
385: * alias created with define. If it is an alias, replace it with
386: * its string value and reparse.
387: * MODE_TOK: Like MODE_SUB, but also check the token against the list
388: * of tokens, and if there is a match, return that token. Otherwise,
389: * if the token matches a symbol, return EQN_TOK_SYM; if it matches
390: * a function name, EQN_TOK_FUNC, or else EQN_TOK__MAX. Except for
391: * a token match, *ep->start is set to an allocated string that the
392: * caller is expected to free.
393: * All modes skip whitespace following the end of the token.
1.48 kristaps 394: */
1.71 schwarze 395: static enum eqn_tok
396: eqn_next(struct eqn_node *ep, enum parse_mode mode)
1.6 kristaps 397: {
1.71 schwarze 398: static int last_len, lim;
1.62 schwarze 399:
1.12 kristaps 400: struct eqn_def *def;
1.71 schwarze 401: size_t start;
402: int diff, i, quoted;
403: enum eqn_tok tok;
1.12 kristaps 404:
1.71 schwarze 405: /*
406: * Reset the recursion counter after advancing
407: * beyond the end of the previous substitution.
408: */
409: if (ep->end - ep->data >= last_len)
1.62 schwarze 410: lim = 0;
1.13 kristaps 411:
1.71 schwarze 412: ep->start = ep->end;
413: quoted = mode == MODE_QUOTED;
414: for (;;) {
415: switch (*ep->start) {
416: case '\0':
417: ep->toksz = 0;
418: return EQN_TOK_EOF;
419: case '"':
420: quoted = 1;
421: break;
422: default:
423: break;
424: }
425: if (quoted) {
426: ep->end = strchr(ep->start + 1, *ep->start);
427: ep->start++; /* Skip opening quote. */
428: if (ep->end == NULL) {
429: mandoc_msg(MANDOCERR_ARG_QUOTE, ep->parse,
430: ep->eqn.ln, ep->eqn.pos, NULL);
431: ep->end = strchr(ep->start, '\0');
432: }
433: } else {
434: ep->end = ep->start + 1;
435: if (*ep->start != '{' && *ep->start != '}')
436: ep->end += strcspn(ep->end, " ^~\"{}\t");
437: }
438: ep->toksz = ep->end - ep->start;
439: if (quoted && *ep->end != '\0')
440: ep->end++; /* Skip closing quote. */
441: while (*ep->end != '\0' && strchr(" \t^~", *ep->end) != NULL)
442: ep->end++;
443: if (quoted) /* Cannot return, may have to strndup. */
444: break;
445: if (mode == MODE_NOSUB)
446: return EQN_TOK__MAX;
447: if ((def = eqn_def_find(ep)) == NULL)
448: break;
449: if (++lim > EQN_NEST_MAX) {
450: mandoc_msg(MANDOCERR_ROFFLOOP, ep->parse,
1.57 schwarze 451: ep->eqn.ln, ep->eqn.pos, NULL);
1.71 schwarze 452: return EQN_TOK_EOF;
453: }
1.12 kristaps 454:
1.71 schwarze 455: /* Replace a defined name with its string value. */
456: if ((diff = def->valsz - ep->toksz) > 0) {
457: start = ep->start - ep->data;
1.12 kristaps 458: ep->sz += diff;
459: ep->data = mandoc_realloc(ep->data, ep->sz + 1);
1.71 schwarze 460: ep->start = ep->data + start;
1.12 kristaps 461: }
1.71 schwarze 462: if (diff)
463: memmove(ep->start + def->valsz, ep->start + ep->toksz,
464: strlen(ep->start + ep->toksz) + 1);
465: memcpy(ep->start, def->val, def->valsz);
466: last_len = ep->start - ep->data + def->valsz;
1.6 kristaps 467: }
1.71 schwarze 468: if (mode != MODE_TOK)
469: return quoted ? EQN_TOK_QUOTED : EQN_TOK__MAX;
1.53 schwarze 470: if (quoted) {
1.71 schwarze 471: ep->start = mandoc_strndup(ep->start, ep->toksz);
1.67 schwarze 472: return EQN_TOK_QUOTED;
1.53 schwarze 473: }
1.71 schwarze 474: for (tok = 0; tok < EQN_TOK__MAX; tok++)
475: if (STRNEQ(ep->start, ep->toksz,
476: eqn_toks[tok], strlen(eqn_toks[tok])))
477: return tok;
1.48 kristaps 478:
1.65 schwarze 479: for (i = 0; i < EQNSYM__MAX; i++) {
1.71 schwarze 480: if (STRNEQ(ep->start, ep->toksz,
1.65 schwarze 481: eqnsyms[i].str, strlen(eqnsyms[i].str))) {
1.71 schwarze 482: mandoc_asprintf(&ep->start,
483: "\\[%s]", eqnsyms[i].sym);
1.67 schwarze 484: return EQN_TOK_SYM;
1.65 schwarze 485: }
486: }
1.71 schwarze 487: ep->start = mandoc_strndup(ep->start, ep->toksz);
488: for (i = 0; i < (int)(sizeof(eqn_func)/sizeof(*eqn_func)); i++)
489: if (STRNEQ(ep->start, ep->toksz,
490: eqn_func[i], strlen(eqn_func[i])))
1.64 schwarze 491: return EQN_TOK_FUNC;
492: return EQN_TOK__MAX;
1.48 kristaps 493: }
494:
495: static void
496: eqn_box_free(struct eqn_box *bp)
1.33 kristaps 497: {
498:
1.48 kristaps 499: if (bp->first)
500: eqn_box_free(bp->first);
501: if (bp->next)
502: eqn_box_free(bp->next);
1.33 kristaps 503:
1.48 kristaps 504: free(bp->text);
505: free(bp->left);
506: free(bp->right);
507: free(bp->top);
508: free(bp->bottom);
509: free(bp);
1.33 kristaps 510: }
511:
1.48 kristaps 512: /*
513: * Allocate a box as the last child of the parent node.
514: */
515: static struct eqn_box *
516: eqn_box_alloc(struct eqn_node *ep, struct eqn_box *parent)
1.8 kristaps 517: {
1.48 kristaps 518: struct eqn_box *bp;
519:
520: bp = mandoc_calloc(1, sizeof(struct eqn_box));
521: bp->parent = parent;
522: bp->parent->args++;
523: bp->expectargs = UINT_MAX;
1.68 schwarze 524: bp->font = bp->parent->font;
1.48 kristaps 525: bp->size = ep->gsize;
526:
527: if (NULL != parent->first) {
528: parent->last->next = bp;
529: bp->prev = parent->last;
530: } else
531: parent->first = bp;
532:
533: parent->last = bp;
1.59 schwarze 534: return bp;
1.48 kristaps 535: }
1.8 kristaps 536:
1.48 kristaps 537: /*
538: * Reparent the current last node (of the current parent) under a new
539: * EQN_SUBEXPR as the first element.
540: * Then return the new parent.
541: * The new EQN_SUBEXPR will have a two-child limit.
542: */
543: static struct eqn_box *
1.51 schwarze 544: eqn_box_makebinary(struct eqn_node *ep,
1.48 kristaps 545: enum eqn_post pos, struct eqn_box *parent)
546: {
547: struct eqn_box *b, *newb;
1.36 kristaps 548:
1.48 kristaps 549: assert(NULL != parent->last);
550: b = parent->last;
551: if (parent->last == parent->first)
552: parent->first = NULL;
553: parent->args--;
554: parent->last = b->prev;
555: b->prev = NULL;
556: newb = eqn_box_alloc(ep, parent);
557: newb->pos = pos;
558: newb->type = EQN_SUBEXPR;
559: newb->expectargs = 2;
560: newb->args = 1;
561: newb->first = newb->last = b;
562: newb->first->next = NULL;
563: b->parent = newb;
1.59 schwarze 564: return newb;
1.36 kristaps 565: }
566:
1.48 kristaps 567: /*
1.54 schwarze 568: * Parse the "delim" control statement.
569: */
570: static void
571: eqn_delim(struct eqn_node *ep)
572: {
1.71 schwarze 573: if (ep->end[0] == '\0' || ep->end[1] == '\0') {
1.54 schwarze 574: mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
575: ep->eqn.ln, ep->eqn.pos, "delim");
1.71 schwarze 576: if (ep->end[0] != '\0')
577: ep->end++;
578: } else if (strncmp(ep->end, "off", 3) == 0) {
1.54 schwarze 579: ep->delim = 0;
1.71 schwarze 580: ep->end += 3;
581: } else if (strncmp(ep->end, "on", 2) == 0) {
1.54 schwarze 582: if (ep->odelim && ep->cdelim)
583: ep->delim = 1;
1.71 schwarze 584: ep->end += 2;
585: } else {
586: ep->odelim = *ep->end++;
587: ep->cdelim = *ep->end++;
1.54 schwarze 588: ep->delim = 1;
589: }
590: }
591:
592: /*
1.48 kristaps 593: * Undefine a previously-defined string.
594: */
1.57 schwarze 595: static void
1.48 kristaps 596: eqn_undef(struct eqn_node *ep)
1.36 kristaps 597: {
1.48 kristaps 598: struct eqn_def *def;
1.36 kristaps 599:
1.71 schwarze 600: if (eqn_next(ep, MODE_NOSUB) == EQN_TOK_EOF) {
1.57 schwarze 601: mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
602: ep->eqn.ln, ep->eqn.pos, "undef");
603: return;
604: }
1.71 schwarze 605: if ((def = eqn_def_find(ep)) == NULL)
1.57 schwarze 606: return;
607: free(def->key);
608: free(def->val);
609: def->key = def->val = NULL;
610: def->keysz = def->valsz = 0;
1.8 kristaps 611: }
612:
1.57 schwarze 613: static void
1.48 kristaps 614: eqn_def(struct eqn_node *ep)
1.8 kristaps 615: {
1.12 kristaps 616: struct eqn_def *def;
1.8 kristaps 617: int i;
618:
1.71 schwarze 619: if (eqn_next(ep, MODE_NOSUB) == EQN_TOK_EOF) {
1.57 schwarze 620: mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
621: ep->eqn.ln, ep->eqn.pos, "define");
622: return;
1.8 kristaps 623: }
624:
1.40 schwarze 625: /*
626: * Search for a key that already exists.
1.12 kristaps 627: * Create a new key if none is found.
1.8 kristaps 628: */
1.71 schwarze 629: if ((def = eqn_def_find(ep)) == NULL) {
1.8 kristaps 630: /* Find holes in string array. */
631: for (i = 0; i < (int)ep->defsz; i++)
632: if (0 == ep->defs[i].keysz)
633: break;
634:
635: if (i == (int)ep->defsz) {
636: ep->defsz++;
1.42 schwarze 637: ep->defs = mandoc_reallocarray(ep->defs,
638: ep->defsz, sizeof(struct eqn_def));
1.9 kristaps 639: ep->defs[i].key = ep->defs[i].val = NULL;
1.8 kristaps 640: }
641:
1.57 schwarze 642: def = ep->defs + i;
643: free(def->key);
1.71 schwarze 644: def->key = mandoc_strndup(ep->start, ep->toksz);
645: def->keysz = ep->toksz;
1.8 kristaps 646: }
647:
1.71 schwarze 648: if (eqn_next(ep, MODE_QUOTED) == EQN_TOK_EOF) {
1.57 schwarze 649: mandoc_vmsg(MANDOCERR_REQ_EMPTY, ep->parse,
650: ep->eqn.ln, ep->eqn.pos, "define %s", def->key);
651: free(def->key);
652: free(def->val);
653: def->key = def->val = NULL;
654: def->keysz = def->valsz = 0;
655: return;
1.8 kristaps 656: }
1.57 schwarze 657: free(def->val);
1.71 schwarze 658: def->val = mandoc_strndup(ep->start, ep->toksz);
659: def->valsz = ep->toksz;
1.30 kristaps 660: }
661:
1.48 kristaps 662: /*
663: * Recursively parse an eqn(7) expression.
664: */
1.57 schwarze 665: static enum rofferr
1.48 kristaps 666: eqn_parse(struct eqn_node *ep, struct eqn_box *parent)
1.30 kristaps 667: {
1.70 schwarze 668: struct eqn_box *cur, *nbox, *split;
1.71 schwarze 669: const char *cp, *cpn;
1.48 kristaps 670: char *p;
1.71 schwarze 671: enum eqn_tok tok;
1.48 kristaps 672: enum eqn_post pos;
1.68 schwarze 673: enum { CCL_LET, CCL_DIG, CCL_PUN } ccl, ccln;
1.57 schwarze 674: int size;
1.30 kristaps 675:
1.56 schwarze 676: assert(parent != NULL);
1.57 schwarze 677:
678: /*
679: * Empty equation.
680: * Do not add it to the high-level syntax tree.
681: */
682:
1.56 schwarze 683: if (ep->data == NULL)
1.59 schwarze 684: return ROFF_IGN;
1.51 schwarze 685:
1.72 ! schwarze 686: ep->start = ep->end = ep->data + strspn(ep->data, " ^~");
1.71 schwarze 687:
1.52 schwarze 688: next_tok:
1.71 schwarze 689: tok = eqn_next(ep, MODE_TOK);
1.52 schwarze 690: switch (tok) {
1.63 schwarze 691: case EQN_TOK_UNDEF:
1.57 schwarze 692: eqn_undef(ep);
1.48 kristaps 693: break;
1.63 schwarze 694: case EQN_TOK_NDEFINE:
695: case EQN_TOK_DEFINE:
1.57 schwarze 696: eqn_def(ep);
1.48 kristaps 697: break;
1.63 schwarze 698: case EQN_TOK_TDEFINE:
1.71 schwarze 699: if (eqn_next(ep, MODE_NOSUB) == EQN_TOK_EOF ||
700: eqn_next(ep, MODE_QUOTED) == EQN_TOK_EOF)
1.57 schwarze 701: mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
702: ep->eqn.ln, ep->eqn.pos, "tdefine");
1.48 kristaps 703: break;
1.63 schwarze 704: case EQN_TOK_DELIM:
1.54 schwarze 705: eqn_delim(ep);
706: break;
1.63 schwarze 707: case EQN_TOK_GFONT:
1.71 schwarze 708: if (eqn_next(ep, MODE_SUB) == EQN_TOK_EOF)
1.52 schwarze 709: mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
710: ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
1.48 kristaps 711: break;
1.63 schwarze 712: case EQN_TOK_MARK:
713: case EQN_TOK_LINEUP:
1.48 kristaps 714: /* Ignore these. */
715: break;
1.63 schwarze 716: case EQN_TOK_DYAD:
717: case EQN_TOK_VEC:
718: case EQN_TOK_UNDER:
719: case EQN_TOK_BAR:
720: case EQN_TOK_TILDE:
721: case EQN_TOK_HAT:
722: case EQN_TOK_DOT:
723: case EQN_TOK_DOTDOT:
1.52 schwarze 724: if (parent->last == NULL) {
725: mandoc_msg(MANDOCERR_EQN_NOBOX, ep->parse,
726: ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
727: cur = eqn_box_alloc(ep, parent);
728: cur->type = EQN_TEXT;
729: cur->text = mandoc_strdup("");
1.48 kristaps 730: }
1.51 schwarze 731: parent = eqn_box_makebinary(ep, EQNPOS_NONE, parent);
1.48 kristaps 732: parent->type = EQN_LISTONE;
733: parent->expectargs = 1;
1.68 schwarze 734: parent->font = EQNFONT_ROMAN;
1.48 kristaps 735: switch (tok) {
1.63 schwarze 736: case EQN_TOK_DOTDOT:
1.71 schwarze 737: parent->top = mandoc_strdup("\\[ad]");
1.48 kristaps 738: break;
1.63 schwarze 739: case EQN_TOK_VEC:
1.71 schwarze 740: parent->top = mandoc_strdup("\\[->]");
1.48 kristaps 741: break;
1.63 schwarze 742: case EQN_TOK_DYAD:
1.71 schwarze 743: parent->top = mandoc_strdup("\\[<>]");
1.48 kristaps 744: break;
1.63 schwarze 745: case EQN_TOK_TILDE:
1.71 schwarze 746: parent->top = mandoc_strdup("\\[a~]");
1.48 kristaps 747: break;
1.63 schwarze 748: case EQN_TOK_UNDER:
1.71 schwarze 749: parent->bottom = mandoc_strdup("\\[ul]");
1.48 kristaps 750: break;
1.63 schwarze 751: case EQN_TOK_BAR:
1.71 schwarze 752: parent->top = mandoc_strdup("\\[rl]");
1.48 kristaps 753: break;
1.63 schwarze 754: case EQN_TOK_DOT:
1.71 schwarze 755: parent->top = mandoc_strdup("\\[a.]");
1.48 kristaps 756: break;
1.63 schwarze 757: case EQN_TOK_HAT:
1.71 schwarze 758: parent->top = mandoc_strdup("\\[ha]");
1.48 kristaps 759: break;
760: default:
761: abort();
762: }
763: parent = parent->parent;
764: break;
1.63 schwarze 765: case EQN_TOK_FWD:
766: case EQN_TOK_BACK:
767: case EQN_TOK_DOWN:
768: case EQN_TOK_UP:
1.71 schwarze 769: if (eqn_next(ep, MODE_SUB) == EQN_TOK_EOF)
1.52 schwarze 770: mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
771: ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
1.48 kristaps 772: break;
1.63 schwarze 773: case EQN_TOK_FAT:
774: case EQN_TOK_ROMAN:
775: case EQN_TOK_ITALIC:
776: case EQN_TOK_BOLD:
1.48 kristaps 777: while (parent->args == parent->expectargs)
1.52 schwarze 778: parent = parent->parent;
1.48 kristaps 779: /*
780: * These values apply to the next word or sequence of
781: * words; thus, we mark that we'll have a child with
782: * exactly one of those.
783: */
784: parent = eqn_box_alloc(ep, parent);
785: parent->type = EQN_LISTONE;
786: parent->expectargs = 1;
787: switch (tok) {
1.63 schwarze 788: case EQN_TOK_FAT:
1.48 kristaps 789: parent->font = EQNFONT_FAT;
790: break;
1.63 schwarze 791: case EQN_TOK_ROMAN:
1.48 kristaps 792: parent->font = EQNFONT_ROMAN;
793: break;
1.63 schwarze 794: case EQN_TOK_ITALIC:
1.48 kristaps 795: parent->font = EQNFONT_ITALIC;
796: break;
1.63 schwarze 797: case EQN_TOK_BOLD:
1.48 kristaps 798: parent->font = EQNFONT_BOLD;
799: break;
800: default:
801: abort();
802: }
803: break;
1.63 schwarze 804: case EQN_TOK_SIZE:
805: case EQN_TOK_GSIZE:
1.48 kristaps 806: /* Accept two values: integral size and a single. */
1.71 schwarze 807: if (eqn_next(ep, MODE_SUB) == EQN_TOK_EOF) {
1.52 schwarze 808: mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
809: ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
810: break;
1.48 kristaps 811: }
1.71 schwarze 812: size = mandoc_strntoi(ep->start, ep->toksz, 10);
1.48 kristaps 813: if (-1 == size) {
1.52 schwarze 814: mandoc_msg(MANDOCERR_IT_NONUM, ep->parse,
815: ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
816: break;
1.48 kristaps 817: }
818: if (EQN_TOK_GSIZE == tok) {
819: ep->gsize = size;
820: break;
821: }
822: parent = eqn_box_alloc(ep, parent);
823: parent->type = EQN_LISTONE;
824: parent->expectargs = 1;
825: parent->size = size;
826: break;
1.63 schwarze 827: case EQN_TOK_FROM:
828: case EQN_TOK_TO:
829: case EQN_TOK_SUB:
830: case EQN_TOK_SUP:
1.48 kristaps 831: /*
832: * We have a left-right-associative expression.
833: * Repivot under a positional node, open a child scope
834: * and keep on reading.
835: */
1.52 schwarze 836: if (parent->last == NULL) {
837: mandoc_msg(MANDOCERR_EQN_NOBOX, ep->parse,
838: ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
839: cur = eqn_box_alloc(ep, parent);
840: cur->type = EQN_TEXT;
841: cur->text = mandoc_strdup("");
1.48 kristaps 842: }
843: /* Handle the "subsup" and "fromto" positions. */
844: if (EQN_TOK_SUP == tok && parent->pos == EQNPOS_SUB) {
845: parent->expectargs = 3;
846: parent->pos = EQNPOS_SUBSUP;
847: break;
848: }
849: if (EQN_TOK_TO == tok && parent->pos == EQNPOS_FROM) {
850: parent->expectargs = 3;
851: parent->pos = EQNPOS_FROMTO;
852: break;
853: }
854: switch (tok) {
1.63 schwarze 855: case EQN_TOK_FROM:
1.48 kristaps 856: pos = EQNPOS_FROM;
857: break;
1.63 schwarze 858: case EQN_TOK_TO:
1.48 kristaps 859: pos = EQNPOS_TO;
860: break;
1.63 schwarze 861: case EQN_TOK_SUP:
1.48 kristaps 862: pos = EQNPOS_SUP;
863: break;
1.63 schwarze 864: case EQN_TOK_SUB:
1.48 kristaps 865: pos = EQNPOS_SUB;
866: break;
867: default:
868: abort();
869: }
870: parent = eqn_box_makebinary(ep, pos, parent);
871: break;
1.63 schwarze 872: case EQN_TOK_SQRT:
1.48 kristaps 873: while (parent->args == parent->expectargs)
1.52 schwarze 874: parent = parent->parent;
1.51 schwarze 875: /*
1.48 kristaps 876: * Accept a left-right-associative set of arguments just
877: * like sub and sup and friends but without rebalancing
878: * under a pivot.
879: */
880: parent = eqn_box_alloc(ep, parent);
881: parent->type = EQN_SUBEXPR;
882: parent->pos = EQNPOS_SQRT;
883: parent->expectargs = 1;
884: break;
1.63 schwarze 885: case EQN_TOK_OVER:
1.48 kristaps 886: /*
887: * We have a right-left-associative fraction.
888: * Close out anything that's currently open, then
889: * rebalance and continue reading.
890: */
1.52 schwarze 891: if (parent->last == NULL) {
892: mandoc_msg(MANDOCERR_EQN_NOBOX, ep->parse,
893: ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
894: cur = eqn_box_alloc(ep, parent);
895: cur->type = EQN_TEXT;
896: cur->text = mandoc_strdup("");
1.48 kristaps 897: }
898: while (EQN_SUBEXPR == parent->type)
1.52 schwarze 899: parent = parent->parent;
1.48 kristaps 900: parent = eqn_box_makebinary(ep, EQNPOS_OVER, parent);
901: break;
1.63 schwarze 902: case EQN_TOK_RIGHT:
903: case EQN_TOK_BRACE_CLOSE:
1.48 kristaps 904: /*
905: * Close out the existing brace.
906: * FIXME: this is a shitty sentinel: we should really
907: * have a native EQN_BRACE type or whatnot.
908: */
1.52 schwarze 909: for (cur = parent; cur != NULL; cur = cur->parent)
910: if (cur->type == EQN_LIST &&
911: (tok == EQN_TOK_BRACE_CLOSE ||
912: cur->left != NULL))
913: break;
914: if (cur == NULL) {
915: mandoc_msg(MANDOCERR_BLK_NOTOPEN, ep->parse,
916: ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
917: break;
918: }
919: parent = cur;
1.48 kristaps 920: if (EQN_TOK_RIGHT == tok) {
1.71 schwarze 921: if (eqn_next(ep, MODE_SUB) == EQN_TOK_EOF) {
1.52 schwarze 922: mandoc_msg(MANDOCERR_REQ_EMPTY,
923: ep->parse, ep->eqn.ln,
924: ep->eqn.pos, eqn_toks[tok]);
925: break;
1.48 kristaps 926: }
927: /* Handling depends on right/left. */
1.71 schwarze 928: if (STRNEQ(ep->start, ep->toksz, "ceiling", 7))
929: parent->right = mandoc_strdup("\\[rc]");
930: else if (STRNEQ(ep->start, ep->toksz, "floor", 5))
931: parent->right = mandoc_strdup("\\[rf]");
932: else
933: parent->right =
934: mandoc_strndup(ep->start, ep->toksz);
1.48 kristaps 935: }
1.52 schwarze 936: parent = parent->parent;
1.61 schwarze 937: if (tok == EQN_TOK_BRACE_CLOSE &&
1.51 schwarze 938: (parent->type == EQN_PILE ||
939: parent->type == EQN_MATRIX))
1.48 kristaps 940: parent = parent->parent;
941: /* Close out any "singleton" lists. */
1.51 schwarze 942: while (parent->type == EQN_LISTONE &&
943: parent->args == parent->expectargs)
1.52 schwarze 944: parent = parent->parent;
1.48 kristaps 945: break;
1.63 schwarze 946: case EQN_TOK_BRACE_OPEN:
947: case EQN_TOK_LEFT:
1.48 kristaps 948: /*
949: * If we already have something in the stack and we're
950: * in an expression, then rewind til we're not any more
951: * (just like with the text node).
952: */
953: while (parent->args == parent->expectargs)
1.52 schwarze 954: parent = parent->parent;
955: if (EQN_TOK_LEFT == tok &&
1.71 schwarze 956: eqn_next(ep, MODE_SUB) == EQN_TOK_EOF) {
1.52 schwarze 957: mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
958: ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
959: break;
960: }
1.48 kristaps 961: parent = eqn_box_alloc(ep, parent);
962: parent->type = EQN_LIST;
963: if (EQN_TOK_LEFT == tok) {
1.71 schwarze 964: if (STRNEQ(ep->start, ep->toksz, "ceiling", 7))
965: parent->left = mandoc_strdup("\\[lc]");
966: else if (STRNEQ(ep->start, ep->toksz, "floor", 5))
967: parent->left = mandoc_strdup("\\[lf]");
968: else
969: parent->left =
970: mandoc_strndup(ep->start, ep->toksz);
1.48 kristaps 971: }
972: break;
1.63 schwarze 973: case EQN_TOK_PILE:
974: case EQN_TOK_LPILE:
975: case EQN_TOK_RPILE:
976: case EQN_TOK_CPILE:
977: case EQN_TOK_CCOL:
978: case EQN_TOK_LCOL:
979: case EQN_TOK_RCOL:
1.48 kristaps 980: while (parent->args == parent->expectargs)
1.52 schwarze 981: parent = parent->parent;
1.48 kristaps 982: parent = eqn_box_alloc(ep, parent);
983: parent->type = EQN_PILE;
1.52 schwarze 984: parent->expectargs = 1;
1.48 kristaps 985: break;
1.63 schwarze 986: case EQN_TOK_ABOVE:
1.52 schwarze 987: for (cur = parent; cur != NULL; cur = cur->parent)
988: if (cur->type == EQN_PILE)
989: break;
990: if (cur == NULL) {
991: mandoc_msg(MANDOCERR_IT_STRAY, ep->parse,
992: ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
993: break;
994: }
995: parent = eqn_box_alloc(ep, cur);
1.48 kristaps 996: parent->type = EQN_LIST;
997: break;
1.63 schwarze 998: case EQN_TOK_MATRIX:
1.48 kristaps 999: while (parent->args == parent->expectargs)
1.52 schwarze 1000: parent = parent->parent;
1.48 kristaps 1001: parent = eqn_box_alloc(ep, parent);
1002: parent->type = EQN_MATRIX;
1.52 schwarze 1003: parent->expectargs = 1;
1.48 kristaps 1004: break;
1.63 schwarze 1005: case EQN_TOK_EOF:
1.48 kristaps 1006: /*
1.51 schwarze 1007: * End of file!
1.48 kristaps 1008: * TODO: make sure we're not in an open subexpression.
1009: */
1.59 schwarze 1010: return ROFF_EQN;
1.67 schwarze 1011: case EQN_TOK__MAX:
1.64 schwarze 1012: case EQN_TOK_FUNC:
1.67 schwarze 1013: case EQN_TOK_QUOTED:
1014: case EQN_TOK_SYM:
1.71 schwarze 1015: p = ep->start;
1.64 schwarze 1016: assert(p != NULL);
1.48 kristaps 1017: /*
1018: * If we already have something in the stack and we're
1019: * in an expression, then rewind til we're not any more.
1020: */
1021: while (parent->args == parent->expectargs)
1.52 schwarze 1022: parent = parent->parent;
1.48 kristaps 1023: cur = eqn_box_alloc(ep, parent);
1024: cur->type = EQN_TEXT;
1.65 schwarze 1025: cur->text = p;
1.68 schwarze 1026: switch (tok) {
1027: case EQN_TOK_FUNC:
1028: cur->font = EQNFONT_ROMAN;
1029: break;
1030: case EQN_TOK_QUOTED:
1031: if (cur->font == EQNFONT_NONE)
1.67 schwarze 1032: cur->font = EQNFONT_ITALIC;
1.68 schwarze 1033: break;
1034: case EQN_TOK_SYM:
1035: break;
1036: default:
1037: if (cur->font != EQNFONT_NONE || *p == '\0')
1.67 schwarze 1038: break;
1.68 schwarze 1039: cpn = p - 1;
1040: ccln = CCL_LET;
1.70 schwarze 1041: split = NULL;
1.66 schwarze 1042: for (;;) {
1.68 schwarze 1043: /* Advance to next character. */
1044: cp = cpn++;
1045: ccl = ccln;
1046: ccln = isalpha((unsigned char)*cpn) ? CCL_LET :
1047: isdigit((unsigned char)*cpn) ||
1048: (*cpn == '.' && (ccl == CCL_DIG ||
1049: isdigit((unsigned char)cpn[1]))) ?
1050: CCL_DIG : CCL_PUN;
1051: /* No boundary before first character. */
1052: if (cp < p)
1053: continue;
1054: cur->font = ccl == CCL_LET ?
1055: EQNFONT_ITALIC : EQNFONT_ROMAN;
1.66 schwarze 1056: if (*cp == '\\')
1057: mandoc_escape(&cpn, NULL, NULL);
1.68 schwarze 1058: /* No boundary after last character. */
1.66 schwarze 1059: if (*cpn == '\0')
1060: break;
1.68 schwarze 1061: if (ccln == ccl)
1.66 schwarze 1062: continue;
1.69 schwarze 1063: /* Boundary found, split the text. */
1064: if (parent->args == parent->expectargs) {
1065: /* Remove the text from the tree. */
1066: if (cur->prev == NULL)
1067: parent->first = cur->next;
1068: else
1069: cur->prev->next = NULL;
1070: parent->last = cur->prev;
1071: parent->args--;
1072: /* Set up a list instead. */
1.70 schwarze 1073: split = eqn_box_alloc(ep, parent);
1074: split->type = EQN_LIST;
1.69 schwarze 1075: /* Insert the word into the list. */
1.70 schwarze 1076: split->first = split->last = cur;
1077: cur->parent = split;
1.69 schwarze 1078: cur->prev = NULL;
1.70 schwarze 1079: parent = split;
1.69 schwarze 1080: }
1081: /* Append a new text box. */
1.66 schwarze 1082: nbox = eqn_box_alloc(ep, parent);
1083: nbox->type = EQN_TEXT;
1084: nbox->text = mandoc_strdup(cpn);
1.68 schwarze 1085: /* Truncate the old box. */
1.66 schwarze 1086: p = mandoc_strndup(cur->text,
1087: cpn - cur->text);
1088: free(cur->text);
1089: cur->text = p;
1.68 schwarze 1090: /* Setup to process the new box. */
1.66 schwarze 1091: cur = nbox;
1.68 schwarze 1092: p = nbox->text;
1093: cpn = p - 1;
1094: ccln = CCL_LET;
1.66 schwarze 1095: }
1.70 schwarze 1096: if (split != NULL)
1097: parent = split->parent;
1.68 schwarze 1098: break;
1099: }
1.48 kristaps 1100: /*
1101: * Post-process list status.
1102: */
1.51 schwarze 1103: while (parent->type == EQN_LISTONE &&
1.52 schwarze 1104: parent->args == parent->expectargs)
1105: parent = parent->parent;
1.48 kristaps 1106: break;
1.64 schwarze 1107: default:
1108: abort();
1.40 schwarze 1109: }
1.52 schwarze 1110: goto next_tok;
1.29 kristaps 1111: }
1112:
1.48 kristaps 1113: enum rofferr
1.51 schwarze 1114: eqn_end(struct eqn_node **epp)
1.8 kristaps 1115: {
1.48 kristaps 1116: struct eqn_node *ep;
1.8 kristaps 1117:
1.48 kristaps 1118: ep = *epp;
1119: *epp = NULL;
1.8 kristaps 1120:
1.48 kristaps 1121: ep->eqn.root = mandoc_calloc(1, sizeof(struct eqn_box));
1122: ep->eqn.root->expectargs = UINT_MAX;
1.59 schwarze 1123: return eqn_parse(ep, ep->eqn.root);
1.12 kristaps 1124: }
1125:
1.48 kristaps 1126: void
1127: eqn_free(struct eqn_node *p)
1.12 kristaps 1128: {
1129: int i;
1.8 kristaps 1130:
1.48 kristaps 1131: eqn_box_free(p->eqn.root);
1132:
1133: for (i = 0; i < (int)p->defsz; i++) {
1134: free(p->defs[i].key);
1135: free(p->defs[i].val);
1136: }
1.8 kristaps 1137:
1.48 kristaps 1138: free(p->data);
1139: free(p->defs);
1140: free(p);
1.1 kristaps 1141: }
CVSweb