Annotation of mandoc/eqn.c, Revision 1.65
1.65 ! schwarze 1: /* $Id: eqn.c,v 1.64 2017/06/21 18:04:34 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>
1.19 kristaps 23: #include <limits.h>
1.1 kristaps 24: #include <stdio.h>
25: #include <stdlib.h>
26: #include <string.h>
27: #include <time.h>
28:
29: #include "mandoc.h"
1.39 schwarze 30: #include "mandoc_aux.h"
1.1 kristaps 31: #include "libmandoc.h"
32: #include "libroff.h"
33:
1.11 kristaps 34: #define EQN_NEST_MAX 128 /* maximum nesting of defines */
1.48 kristaps 35: #define STRNEQ(p1, sz1, p2, sz2) \
36: ((sz1) == (sz2) && 0 == strncmp((p1), (p2), (sz1)))
1.8 kristaps 37:
1.48 kristaps 38: enum eqn_tok {
39: EQN_TOK_DYAD = 0,
40: EQN_TOK_VEC,
41: EQN_TOK_UNDER,
42: EQN_TOK_BAR,
43: EQN_TOK_TILDE,
44: EQN_TOK_HAT,
45: EQN_TOK_DOT,
46: EQN_TOK_DOTDOT,
47: EQN_TOK_FWD,
48: EQN_TOK_BACK,
49: EQN_TOK_DOWN,
50: EQN_TOK_UP,
51: EQN_TOK_FAT,
52: EQN_TOK_ROMAN,
53: EQN_TOK_ITALIC,
54: EQN_TOK_BOLD,
55: EQN_TOK_SIZE,
56: EQN_TOK_SUB,
57: EQN_TOK_SUP,
58: EQN_TOK_SQRT,
59: EQN_TOK_OVER,
60: EQN_TOK_FROM,
61: EQN_TOK_TO,
62: EQN_TOK_BRACE_OPEN,
63: EQN_TOK_BRACE_CLOSE,
64: EQN_TOK_GSIZE,
65: EQN_TOK_GFONT,
66: EQN_TOK_MARK,
67: EQN_TOK_LINEUP,
68: EQN_TOK_LEFT,
69: EQN_TOK_RIGHT,
70: EQN_TOK_PILE,
71: EQN_TOK_LPILE,
72: EQN_TOK_RPILE,
73: EQN_TOK_CPILE,
74: EQN_TOK_MATRIX,
75: EQN_TOK_CCOL,
76: EQN_TOK_LCOL,
77: EQN_TOK_RCOL,
78: EQN_TOK_DELIM,
79: EQN_TOK_DEFINE,
80: EQN_TOK_TDEFINE,
81: EQN_TOK_NDEFINE,
82: EQN_TOK_UNDEF,
83: EQN_TOK_ABOVE,
1.64 schwarze 84: EQN_TOK__MAX,
85: EQN_TOK_FUNC,
86: EQN_TOK_EOF
1.48 kristaps 87: };
88:
89: static const char *eqn_toks[EQN_TOK__MAX] = {
90: "dyad", /* EQN_TOK_DYAD */
91: "vec", /* EQN_TOK_VEC */
92: "under", /* EQN_TOK_UNDER */
93: "bar", /* EQN_TOK_BAR */
94: "tilde", /* EQN_TOK_TILDE */
95: "hat", /* EQN_TOK_HAT */
96: "dot", /* EQN_TOK_DOT */
97: "dotdot", /* EQN_TOK_DOTDOT */
98: "fwd", /* EQN_TOK_FWD * */
99: "back", /* EQN_TOK_BACK */
100: "down", /* EQN_TOK_DOWN */
101: "up", /* EQN_TOK_UP */
102: "fat", /* EQN_TOK_FAT */
103: "roman", /* EQN_TOK_ROMAN */
104: "italic", /* EQN_TOK_ITALIC */
105: "bold", /* EQN_TOK_BOLD */
106: "size", /* EQN_TOK_SIZE */
107: "sub", /* EQN_TOK_SUB */
108: "sup", /* EQN_TOK_SUP */
109: "sqrt", /* EQN_TOK_SQRT */
110: "over", /* EQN_TOK_OVER */
111: "from", /* EQN_TOK_FROM */
112: "to", /* EQN_TOK_TO */
113: "{", /* EQN_TOK_BRACE_OPEN */
114: "}", /* EQN_TOK_BRACE_CLOSE */
115: "gsize", /* EQN_TOK_GSIZE */
116: "gfont", /* EQN_TOK_GFONT */
117: "mark", /* EQN_TOK_MARK */
118: "lineup", /* EQN_TOK_LINEUP */
119: "left", /* EQN_TOK_LEFT */
120: "right", /* EQN_TOK_RIGHT */
121: "pile", /* EQN_TOK_PILE */
122: "lpile", /* EQN_TOK_LPILE */
123: "rpile", /* EQN_TOK_RPILE */
124: "cpile", /* EQN_TOK_CPILE */
125: "matrix", /* EQN_TOK_MATRIX */
126: "ccol", /* EQN_TOK_CCOL */
127: "lcol", /* EQN_TOK_LCOL */
128: "rcol", /* EQN_TOK_RCOL */
129: "delim", /* EQN_TOK_DELIM */
130: "define", /* EQN_TOK_DEFINE */
131: "tdefine", /* EQN_TOK_TDEFINE */
132: "ndefine", /* EQN_TOK_NDEFINE */
133: "undef", /* EQN_TOK_UNDEF */
134: "above", /* EQN_TOK_ABOVE */
1.20 kristaps 135: };
136:
1.64 schwarze 137: static const char *const eqn_func[] = {
138: "acos", "acsc", "and", "arc", "asec", "asin", "atan",
139: "cos", "cosh", "coth", "csc", "det", "exp", "for",
140: "if", "lim", "ln", "log", "max", "min",
141: "sec", "sin", "sinh", "tan", "tanh", "Im", "Re",
142: };
143:
1.27 kristaps 144: enum eqn_symt {
145: EQNSYM_alpha,
146: EQNSYM_beta,
147: EQNSYM_chi,
148: EQNSYM_delta,
149: EQNSYM_epsilon,
150: EQNSYM_eta,
151: EQNSYM_gamma,
152: EQNSYM_iota,
153: EQNSYM_kappa,
154: EQNSYM_lambda,
155: EQNSYM_mu,
156: EQNSYM_nu,
157: EQNSYM_omega,
158: EQNSYM_omicron,
159: EQNSYM_phi,
160: EQNSYM_pi,
161: EQNSYM_ps,
162: EQNSYM_rho,
163: EQNSYM_sigma,
164: EQNSYM_tau,
165: EQNSYM_theta,
166: EQNSYM_upsilon,
167: EQNSYM_xi,
168: EQNSYM_zeta,
169: EQNSYM_DELTA,
170: EQNSYM_GAMMA,
171: EQNSYM_LAMBDA,
172: EQNSYM_OMEGA,
173: EQNSYM_PHI,
174: EQNSYM_PI,
175: EQNSYM_PSI,
176: EQNSYM_SIGMA,
177: EQNSYM_THETA,
178: EQNSYM_UPSILON,
179: EQNSYM_XI,
1.28 kristaps 180: EQNSYM_inter,
181: EQNSYM_union,
182: EQNSYM_prod,
183: EQNSYM_int,
184: EQNSYM_sum,
185: EQNSYM_grad,
186: EQNSYM_del,
187: EQNSYM_times,
188: EQNSYM_cdot,
189: EQNSYM_nothing,
190: EQNSYM_approx,
191: EQNSYM_prime,
192: EQNSYM_half,
193: EQNSYM_partial,
194: EQNSYM_inf,
195: EQNSYM_muchgreat,
196: EQNSYM_muchless,
197: EQNSYM_larrow,
198: EQNSYM_rarrow,
199: EQNSYM_pm,
200: EQNSYM_nequal,
201: EQNSYM_equiv,
202: EQNSYM_lessequal,
203: EQNSYM_moreequal,
1.58 schwarze 204: EQNSYM_minus,
1.27 kristaps 205: EQNSYM__MAX
206: };
207:
208: struct eqnsym {
1.48 kristaps 209: const char *str;
1.28 kristaps 210: const char *sym;
1.27 kristaps 211: };
212:
213: static const struct eqnsym eqnsyms[EQNSYM__MAX] = {
1.48 kristaps 214: { "alpha", "*a" }, /* EQNSYM_alpha */
215: { "beta", "*b" }, /* EQNSYM_beta */
216: { "chi", "*x" }, /* EQNSYM_chi */
217: { "delta", "*d" }, /* EQNSYM_delta */
218: { "epsilon", "*e" }, /* EQNSYM_epsilon */
219: { "eta", "*y" }, /* EQNSYM_eta */
220: { "gamma", "*g" }, /* EQNSYM_gamma */
221: { "iota", "*i" }, /* EQNSYM_iota */
222: { "kappa", "*k" }, /* EQNSYM_kappa */
223: { "lambda", "*l" }, /* EQNSYM_lambda */
224: { "mu", "*m" }, /* EQNSYM_mu */
225: { "nu", "*n" }, /* EQNSYM_nu */
226: { "omega", "*w" }, /* EQNSYM_omega */
227: { "omicron", "*o" }, /* EQNSYM_omicron */
228: { "phi", "*f" }, /* EQNSYM_phi */
229: { "pi", "*p" }, /* EQNSYM_pi */
230: { "psi", "*q" }, /* EQNSYM_psi */
231: { "rho", "*r" }, /* EQNSYM_rho */
232: { "sigma", "*s" }, /* EQNSYM_sigma */
233: { "tau", "*t" }, /* EQNSYM_tau */
234: { "theta", "*h" }, /* EQNSYM_theta */
235: { "upsilon", "*u" }, /* EQNSYM_upsilon */
236: { "xi", "*c" }, /* EQNSYM_xi */
237: { "zeta", "*z" }, /* EQNSYM_zeta */
238: { "DELTA", "*D" }, /* EQNSYM_DELTA */
239: { "GAMMA", "*G" }, /* EQNSYM_GAMMA */
240: { "LAMBDA", "*L" }, /* EQNSYM_LAMBDA */
241: { "OMEGA", "*W" }, /* EQNSYM_OMEGA */
242: { "PHI", "*F" }, /* EQNSYM_PHI */
243: { "PI", "*P" }, /* EQNSYM_PI */
244: { "PSI", "*Q" }, /* EQNSYM_PSI */
245: { "SIGMA", "*S" }, /* EQNSYM_SIGMA */
246: { "THETA", "*H" }, /* EQNSYM_THETA */
247: { "UPSILON", "*U" }, /* EQNSYM_UPSILON */
248: { "XI", "*C" }, /* EQNSYM_XI */
249: { "inter", "ca" }, /* EQNSYM_inter */
250: { "union", "cu" }, /* EQNSYM_union */
251: { "prod", "product" }, /* EQNSYM_prod */
252: { "int", "integral" }, /* EQNSYM_int */
253: { "sum", "sum" }, /* EQNSYM_sum */
254: { "grad", "gr" }, /* EQNSYM_grad */
255: { "del", "gr" }, /* EQNSYM_del */
256: { "times", "mu" }, /* EQNSYM_times */
257: { "cdot", "pc" }, /* EQNSYM_cdot */
258: { "nothing", "&" }, /* EQNSYM_nothing */
259: { "approx", "~~" }, /* EQNSYM_approx */
1.58 schwarze 260: { "prime", "fm" }, /* EQNSYM_prime */
1.48 kristaps 261: { "half", "12" }, /* EQNSYM_half */
262: { "partial", "pd" }, /* EQNSYM_partial */
263: { "inf", "if" }, /* EQNSYM_inf */
264: { ">>", ">>" }, /* EQNSYM_muchgreat */
265: { "<<", "<<" }, /* EQNSYM_muchless */
266: { "<-", "<-" }, /* EQNSYM_larrow */
267: { "->", "->" }, /* EQNSYM_rarrow */
268: { "+-", "+-" }, /* EQNSYM_pm */
269: { "!=", "!=" }, /* EQNSYM_nequal */
270: { "==", "==" }, /* EQNSYM_equiv */
271: { "<=", "<=" }, /* EQNSYM_lessequal */
272: { ">=", ">=" }, /* EQNSYM_moreequal */
1.58 schwarze 273: { "-", "mi" }, /* EQNSYM_minus */
1.27 kristaps 274: };
275:
1.57 schwarze 276: static struct eqn_box *eqn_box_alloc(struct eqn_node *, struct eqn_box *);
277: static void eqn_box_free(struct eqn_box *);
278: static struct eqn_box *eqn_box_makebinary(struct eqn_node *,
279: enum eqn_post, struct eqn_box *);
280: static void eqn_def(struct eqn_node *);
281: static struct eqn_def *eqn_def_find(struct eqn_node *, const char *, size_t);
282: static void eqn_delim(struct eqn_node *);
283: static const char *eqn_next(struct eqn_node *, char, size_t *, int);
284: static const char *eqn_nextrawtok(struct eqn_node *, size_t *);
285: static const char *eqn_nexttok(struct eqn_node *, size_t *);
286: static enum rofferr eqn_parse(struct eqn_node *, struct eqn_box *);
287: static enum eqn_tok eqn_tok_parse(struct eqn_node *, char **);
288: static void eqn_undef(struct eqn_node *);
289:
290:
1.1 kristaps 291: enum rofferr
1.40 schwarze 292: eqn_read(struct eqn_node **epp, int ln,
1.6 kristaps 293: const char *p, int pos, int *offs)
1.1 kristaps 294: {
1.8 kristaps 295: size_t sz;
296: struct eqn_node *ep;
1.12 kristaps 297: enum rofferr er;
298:
299: ep = *epp;
300:
301: /*
302: * If we're the terminating mark, unset our equation status and
303: * validate the full equation.
304: */
1.1 kristaps 305:
1.35 kristaps 306: if (0 == strncmp(p, ".EN", 3)) {
1.38 kristaps 307: er = eqn_end(epp);
1.35 kristaps 308: p += 3;
309: while (' ' == *p || '\t' == *p)
310: p++;
1.40 schwarze 311: if ('\0' == *p)
1.59 schwarze 312: return er;
1.43 schwarze 313: mandoc_vmsg(MANDOCERR_ARG_SKIP, ep->parse,
314: ln, pos, "EN %s", p);
1.59 schwarze 315: return er;
1.1 kristaps 316: }
317:
1.12 kristaps 318: /*
319: * Build up the full string, replacing all newlines with regular
320: * whitespace.
321: */
1.6 kristaps 322:
1.12 kristaps 323: sz = strlen(p + pos) + 1;
324: ep->data = mandoc_realloc(ep->data, ep->sz + sz + 1);
1.6 kristaps 325:
1.12 kristaps 326: /* First invocation: nil terminate the string. */
1.8 kristaps 327:
1.12 kristaps 328: if (0 == ep->sz)
329: *ep->data = '\0';
1.8 kristaps 330:
1.12 kristaps 331: ep->sz += sz;
332: strlcat(ep->data, p + pos, ep->sz + 1);
333: strlcat(ep->data, " ", ep->sz + 1);
1.59 schwarze 334: return ROFF_IGN;
1.11 kristaps 335: }
336:
1.1 kristaps 337: struct eqn_node *
1.55 schwarze 338: eqn_alloc(int pos, int line, struct mparse *parse)
1.1 kristaps 339: {
340: struct eqn_node *p;
341:
342: p = mandoc_calloc(1, sizeof(struct eqn_node));
1.36 kristaps 343:
1.5 kristaps 344: p->parse = parse;
1.12 kristaps 345: p->eqn.ln = line;
1.2 kristaps 346: p->eqn.pos = pos;
1.29 kristaps 347: p->gsize = EQN_DEFSIZE;
1.1 kristaps 348:
1.59 schwarze 349: return p;
1.1 kristaps 350: }
351:
1.48 kristaps 352: /*
353: * Find the key "key" of the give size within our eqn-defined values.
354: */
355: static struct eqn_def *
356: eqn_def_find(struct eqn_node *ep, const char *key, size_t sz)
1.1 kristaps 357: {
1.6 kristaps 358: int i;
1.1 kristaps 359:
1.48 kristaps 360: for (i = 0; i < (int)ep->defsz; i++)
361: if (ep->defs[i].keysz && STRNEQ(ep->defs[i].key,
362: ep->defs[i].keysz, key, sz))
1.59 schwarze 363: return &ep->defs[i];
1.6 kristaps 364:
1.59 schwarze 365: return NULL;
1.20 kristaps 366: }
367:
1.48 kristaps 368: /*
369: * Get the next token from the input stream using the given quote
370: * character.
371: * Optionally make any replacements.
372: */
1.12 kristaps 373: static const char *
1.14 kristaps 374: eqn_next(struct eqn_node *ep, char quote, size_t *sz, int repl)
1.6 kristaps 375: {
1.62 schwarze 376: static size_t last_len;
377: static int lim;
378:
1.12 kristaps 379: char *start, *next;
1.62 schwarze 380: int q, diff;
1.22 kristaps 381: size_t ssz, dummy;
1.12 kristaps 382: struct eqn_def *def;
383:
384: if (NULL == sz)
1.22 kristaps 385: sz = &dummy;
1.6 kristaps 386:
1.62 schwarze 387: if (ep->cur >= last_len)
388: lim = 0;
1.20 kristaps 389: ep->rew = ep->cur;
1.13 kristaps 390: again:
391: /* Prevent self-definitions. */
392:
393: if (lim >= EQN_NEST_MAX) {
1.57 schwarze 394: mandoc_msg(MANDOCERR_ROFFLOOP, ep->parse,
395: ep->eqn.ln, ep->eqn.pos, NULL);
1.59 schwarze 396: return NULL;
1.13 kristaps 397: }
398:
1.20 kristaps 399: ep->cur = ep->rew;
1.12 kristaps 400: start = &ep->data[(int)ep->cur];
1.6 kristaps 401: q = 0;
402:
403: if ('\0' == *start)
1.59 schwarze 404: return NULL;
1.6 kristaps 405:
1.12 kristaps 406: if (quote == *start) {
407: ep->cur++;
1.6 kristaps 408: q = 1;
409: }
410:
1.12 kristaps 411: start = &ep->data[(int)ep->cur];
1.22 kristaps 412:
413: if ( ! q) {
414: if ('{' == *start || '}' == *start)
415: ssz = 1;
416: else
1.31 kristaps 417: ssz = strcspn(start + 1, " ^~\"{}\t") + 1;
1.22 kristaps 418: next = start + (int)ssz;
419: if ('\0' == *next)
420: next = NULL;
421: } else
422: next = strchr(start, quote);
1.12 kristaps 423:
424: if (NULL != next) {
425: *sz = (size_t)(next - start);
426: ep->cur += *sz;
1.6 kristaps 427: if (q)
1.12 kristaps 428: ep->cur++;
1.22 kristaps 429: while (' ' == ep->data[(int)ep->cur] ||
1.40 schwarze 430: '\t' == ep->data[(int)ep->cur] ||
431: '^' == ep->data[(int)ep->cur] ||
432: '~' == ep->data[(int)ep->cur])
1.12 kristaps 433: ep->cur++;
1.6 kristaps 434: } else {
435: if (q)
1.57 schwarze 436: mandoc_msg(MANDOCERR_ARG_QUOTE, ep->parse,
437: ep->eqn.ln, ep->eqn.pos, NULL);
1.12 kristaps 438: next = strchr(start, '\0');
439: *sz = (size_t)(next - start);
440: ep->cur += *sz;
441: }
442:
1.13 kristaps 443: /* Quotes aren't expanded for values. */
444:
1.14 kristaps 445: if (q || ! repl)
1.59 schwarze 446: return start;
1.13 kristaps 447:
1.12 kristaps 448: if (NULL != (def = eqn_def_find(ep, start, *sz))) {
449: diff = def->valsz - *sz;
450:
451: if (def->valsz > *sz) {
452: ep->sz += diff;
453: ep->data = mandoc_realloc(ep->data, ep->sz + 1);
454: ep->data[ep->sz] = '\0';
1.20 kristaps 455: start = &ep->data[(int)ep->rew];
1.12 kristaps 456: }
457:
458: diff = def->valsz - *sz;
1.40 schwarze 459: memmove(start + *sz + diff, start + *sz,
460: (strlen(start) - *sz) + 1);
1.12 kristaps 461: memcpy(start, def->val, def->valsz);
1.62 schwarze 462: last_len = start - ep->data + def->valsz;
1.60 schwarze 463: lim++;
1.12 kristaps 464: goto again;
1.6 kristaps 465: }
466:
1.59 schwarze 467: return start;
1.8 kristaps 468: }
469:
1.48 kristaps 470: /*
471: * Get the next delimited token using the default current quote
472: * character.
473: */
474: static const char *
475: eqn_nexttok(struct eqn_node *ep, size_t *sz)
476: {
477:
1.59 schwarze 478: return eqn_next(ep, '"', sz, 1);
1.48 kristaps 479: }
480:
481: /*
482: * Get next token without replacement.
483: */
484: static const char *
485: eqn_nextrawtok(struct eqn_node *ep, size_t *sz)
486: {
487:
1.59 schwarze 488: return eqn_next(ep, '"', sz, 0);
1.48 kristaps 489: }
490:
491: /*
492: * Parse a token from the stream of text.
493: * A token consists of one of the recognised eqn(7) strings.
494: * Strings are separated by delimiting marks.
495: * This returns EQN_TOK_EOF when there are no more tokens.
496: * If the token is an unrecognised string literal, then it returns
497: * EQN_TOK__MAX and sets the "p" pointer to an allocated, nil-terminated
498: * string.
499: * This must be later freed with free(3).
500: */
501: static enum eqn_tok
502: eqn_tok_parse(struct eqn_node *ep, char **p)
503: {
504: const char *start;
505: size_t i, sz;
1.53 schwarze 506: int quoted;
1.48 kristaps 507:
1.64 schwarze 508: if (p != NULL)
1.48 kristaps 509: *p = NULL;
510:
1.53 schwarze 511: quoted = ep->data[ep->cur] == '"';
512:
1.64 schwarze 513: if ((start = eqn_nexttok(ep, &sz)) == NULL)
1.59 schwarze 514: return EQN_TOK_EOF;
1.53 schwarze 515:
516: if (quoted) {
517: if (p != NULL)
518: *p = mandoc_strndup(start, sz);
1.59 schwarze 519: return EQN_TOK__MAX;
1.53 schwarze 520: }
1.48 kristaps 521:
1.64 schwarze 522: for (i = 0; i < EQN_TOK__MAX; i++)
1.48 kristaps 523: if (STRNEQ(start, sz, eqn_toks[i], strlen(eqn_toks[i])))
1.64 schwarze 524: return i;
1.48 kristaps 525:
1.65 ! schwarze 526: for (i = 0; i < EQNSYM__MAX; i++) {
! 527: if (STRNEQ(start, sz,
! 528: eqnsyms[i].str, strlen(eqnsyms[i].str))) {
! 529: mandoc_asprintf(p, "\\[%s]", eqnsyms[i].sym);
! 530: return EQN_TOK__MAX;
! 531: }
! 532: }
! 533:
1.64 schwarze 534: if (p != NULL)
1.48 kristaps 535: *p = mandoc_strndup(start, sz);
536:
1.64 schwarze 537: for (i = 0; i < sizeof(eqn_func)/sizeof(*eqn_func); i++)
538: if (STRNEQ(start, sz, eqn_func[i], strlen(eqn_func[i])))
539: return EQN_TOK_FUNC;
540:
541: return EQN_TOK__MAX;
1.48 kristaps 542: }
543:
544: static void
545: eqn_box_free(struct eqn_box *bp)
1.33 kristaps 546: {
547:
1.48 kristaps 548: if (bp->first)
549: eqn_box_free(bp->first);
550: if (bp->next)
551: eqn_box_free(bp->next);
1.33 kristaps 552:
1.48 kristaps 553: free(bp->text);
554: free(bp->left);
555: free(bp->right);
556: free(bp->top);
557: free(bp->bottom);
558: free(bp);
1.33 kristaps 559: }
560:
1.48 kristaps 561: /*
562: * Allocate a box as the last child of the parent node.
563: */
564: static struct eqn_box *
565: eqn_box_alloc(struct eqn_node *ep, struct eqn_box *parent)
1.8 kristaps 566: {
1.48 kristaps 567: struct eqn_box *bp;
568:
569: bp = mandoc_calloc(1, sizeof(struct eqn_box));
570: bp->parent = parent;
571: bp->parent->args++;
572: bp->expectargs = UINT_MAX;
573: bp->size = ep->gsize;
574:
575: if (NULL != parent->first) {
576: parent->last->next = bp;
577: bp->prev = parent->last;
578: } else
579: parent->first = bp;
580:
581: parent->last = bp;
1.59 schwarze 582: return bp;
1.48 kristaps 583: }
1.8 kristaps 584:
1.48 kristaps 585: /*
586: * Reparent the current last node (of the current parent) under a new
587: * EQN_SUBEXPR as the first element.
588: * Then return the new parent.
589: * The new EQN_SUBEXPR will have a two-child limit.
590: */
591: static struct eqn_box *
1.51 schwarze 592: eqn_box_makebinary(struct eqn_node *ep,
1.48 kristaps 593: enum eqn_post pos, struct eqn_box *parent)
594: {
595: struct eqn_box *b, *newb;
1.36 kristaps 596:
1.48 kristaps 597: assert(NULL != parent->last);
598: b = parent->last;
599: if (parent->last == parent->first)
600: parent->first = NULL;
601: parent->args--;
602: parent->last = b->prev;
603: b->prev = NULL;
604: newb = eqn_box_alloc(ep, parent);
605: newb->pos = pos;
606: newb->type = EQN_SUBEXPR;
607: newb->expectargs = 2;
608: newb->args = 1;
609: newb->first = newb->last = b;
610: newb->first->next = NULL;
611: b->parent = newb;
1.59 schwarze 612: return newb;
1.36 kristaps 613: }
614:
1.48 kristaps 615: /*
1.54 schwarze 616: * Parse the "delim" control statement.
617: */
618: static void
619: eqn_delim(struct eqn_node *ep)
620: {
621: const char *start;
622: size_t sz;
623:
624: if ((start = eqn_nextrawtok(ep, &sz)) == NULL)
625: mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
626: ep->eqn.ln, ep->eqn.pos, "delim");
627: else if (strncmp(start, "off", 3) == 0)
628: ep->delim = 0;
629: else if (strncmp(start, "on", 2) == 0) {
630: if (ep->odelim && ep->cdelim)
631: ep->delim = 1;
632: } else if (start[1] != '\0') {
633: ep->odelim = start[0];
634: ep->cdelim = start[1];
635: ep->delim = 1;
636: }
637: }
638:
639: /*
1.48 kristaps 640: * Undefine a previously-defined string.
641: */
1.57 schwarze 642: static void
1.48 kristaps 643: eqn_undef(struct eqn_node *ep)
1.36 kristaps 644: {
1.48 kristaps 645: const char *start;
646: struct eqn_def *def;
647: size_t sz;
1.36 kristaps 648:
1.57 schwarze 649: if ((start = eqn_nextrawtok(ep, &sz)) == NULL) {
650: mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
651: ep->eqn.ln, ep->eqn.pos, "undef");
652: return;
653: }
654: if ((def = eqn_def_find(ep, start, sz)) == NULL)
655: return;
656: free(def->key);
657: free(def->val);
658: def->key = def->val = NULL;
659: def->keysz = def->valsz = 0;
1.8 kristaps 660: }
661:
1.57 schwarze 662: static void
1.48 kristaps 663: eqn_def(struct eqn_node *ep)
1.8 kristaps 664: {
665: const char *start;
666: size_t sz;
1.12 kristaps 667: struct eqn_def *def;
1.8 kristaps 668: int i;
669:
1.57 schwarze 670: if ((start = eqn_nextrawtok(ep, &sz)) == NULL) {
671: mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
672: ep->eqn.ln, ep->eqn.pos, "define");
673: return;
1.8 kristaps 674: }
675:
1.40 schwarze 676: /*
677: * Search for a key that already exists.
1.12 kristaps 678: * Create a new key if none is found.
1.8 kristaps 679: */
1.12 kristaps 680: if (NULL == (def = eqn_def_find(ep, start, sz))) {
1.8 kristaps 681: /* Find holes in string array. */
682: for (i = 0; i < (int)ep->defsz; i++)
683: if (0 == ep->defs[i].keysz)
684: break;
685:
686: if (i == (int)ep->defsz) {
687: ep->defsz++;
1.42 schwarze 688: ep->defs = mandoc_reallocarray(ep->defs,
689: ep->defsz, sizeof(struct eqn_def));
1.9 kristaps 690: ep->defs[i].key = ep->defs[i].val = NULL;
1.8 kristaps 691: }
692:
1.57 schwarze 693: def = ep->defs + i;
694: free(def->key);
695: def->key = mandoc_strndup(start, sz);
696: def->keysz = sz;
1.8 kristaps 697: }
698:
1.14 kristaps 699: start = eqn_next(ep, ep->data[(int)ep->cur], &sz, 0);
1.57 schwarze 700: if (start == NULL) {
701: mandoc_vmsg(MANDOCERR_REQ_EMPTY, ep->parse,
702: ep->eqn.ln, ep->eqn.pos, "define %s", def->key);
703: free(def->key);
704: free(def->val);
705: def->key = def->val = NULL;
706: def->keysz = def->valsz = 0;
707: return;
1.8 kristaps 708: }
1.57 schwarze 709: free(def->val);
710: def->val = mandoc_strndup(start, sz);
1.12 kristaps 711: def->valsz = sz;
1.30 kristaps 712: }
713:
1.48 kristaps 714: /*
715: * Recursively parse an eqn(7) expression.
716: */
1.57 schwarze 717: static enum rofferr
1.48 kristaps 718: eqn_parse(struct eqn_node *ep, struct eqn_box *parent)
1.30 kristaps 719: {
1.57 schwarze 720: char sym[64];
721: struct eqn_box *cur;
722: const char *start;
1.48 kristaps 723: char *p;
1.65 ! schwarze 724: size_t sz;
1.52 schwarze 725: enum eqn_tok tok, subtok;
1.48 kristaps 726: enum eqn_post pos;
1.57 schwarze 727: int size;
1.30 kristaps 728:
1.56 schwarze 729: assert(parent != NULL);
1.57 schwarze 730:
731: /*
732: * Empty equation.
733: * Do not add it to the high-level syntax tree.
734: */
735:
1.56 schwarze 736: if (ep->data == NULL)
1.59 schwarze 737: return ROFF_IGN;
1.51 schwarze 738:
1.52 schwarze 739: next_tok:
740: tok = eqn_tok_parse(ep, &p);
741:
742: this_tok:
743: switch (tok) {
1.63 schwarze 744: case EQN_TOK_UNDEF:
1.57 schwarze 745: eqn_undef(ep);
1.48 kristaps 746: break;
1.63 schwarze 747: case EQN_TOK_NDEFINE:
748: case EQN_TOK_DEFINE:
1.57 schwarze 749: eqn_def(ep);
1.48 kristaps 750: break;
1.63 schwarze 751: case EQN_TOK_TDEFINE:
1.57 schwarze 752: if (eqn_nextrawtok(ep, NULL) == NULL ||
753: eqn_next(ep, ep->data[(int)ep->cur], NULL, 0) == NULL)
754: mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
755: ep->eqn.ln, ep->eqn.pos, "tdefine");
1.48 kristaps 756: break;
1.63 schwarze 757: case EQN_TOK_DELIM:
1.54 schwarze 758: eqn_delim(ep);
759: break;
1.63 schwarze 760: case EQN_TOK_GFONT:
1.52 schwarze 761: if (eqn_nextrawtok(ep, NULL) == NULL)
762: mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
763: ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
1.48 kristaps 764: break;
1.63 schwarze 765: case EQN_TOK_MARK:
766: case EQN_TOK_LINEUP:
1.48 kristaps 767: /* Ignore these. */
768: break;
1.63 schwarze 769: case EQN_TOK_DYAD:
770: case EQN_TOK_VEC:
771: case EQN_TOK_UNDER:
772: case EQN_TOK_BAR:
773: case EQN_TOK_TILDE:
774: case EQN_TOK_HAT:
775: case EQN_TOK_DOT:
776: case EQN_TOK_DOTDOT:
1.52 schwarze 777: if (parent->last == NULL) {
778: mandoc_msg(MANDOCERR_EQN_NOBOX, ep->parse,
779: ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
780: cur = eqn_box_alloc(ep, parent);
781: cur->type = EQN_TEXT;
782: cur->text = mandoc_strdup("");
1.48 kristaps 783: }
1.51 schwarze 784: parent = eqn_box_makebinary(ep, EQNPOS_NONE, parent);
1.48 kristaps 785: parent->type = EQN_LISTONE;
786: parent->expectargs = 1;
787: switch (tok) {
1.63 schwarze 788: case EQN_TOK_DOTDOT:
1.48 kristaps 789: strlcpy(sym, "\\[ad]", sizeof(sym));
790: break;
1.63 schwarze 791: case EQN_TOK_VEC:
1.48 kristaps 792: strlcpy(sym, "\\[->]", sizeof(sym));
793: break;
1.63 schwarze 794: case EQN_TOK_DYAD:
1.48 kristaps 795: strlcpy(sym, "\\[<>]", sizeof(sym));
796: break;
1.63 schwarze 797: case EQN_TOK_TILDE:
1.48 kristaps 798: strlcpy(sym, "\\[a~]", sizeof(sym));
799: break;
1.63 schwarze 800: case EQN_TOK_UNDER:
1.48 kristaps 801: strlcpy(sym, "\\[ul]", sizeof(sym));
802: break;
1.63 schwarze 803: case EQN_TOK_BAR:
1.48 kristaps 804: strlcpy(sym, "\\[rl]", sizeof(sym));
805: break;
1.63 schwarze 806: case EQN_TOK_DOT:
1.48 kristaps 807: strlcpy(sym, "\\[a.]", sizeof(sym));
808: break;
1.63 schwarze 809: case EQN_TOK_HAT:
1.48 kristaps 810: strlcpy(sym, "\\[ha]", sizeof(sym));
811: break;
812: default:
813: abort();
814: }
815:
816: switch (tok) {
1.63 schwarze 817: case EQN_TOK_DOTDOT:
818: case EQN_TOK_VEC:
819: case EQN_TOK_DYAD:
820: case EQN_TOK_TILDE:
821: case EQN_TOK_BAR:
822: case EQN_TOK_DOT:
823: case EQN_TOK_HAT:
1.48 kristaps 824: parent->top = mandoc_strdup(sym);
825: break;
1.63 schwarze 826: case EQN_TOK_UNDER:
1.48 kristaps 827: parent->bottom = mandoc_strdup(sym);
828: break;
829: default:
830: abort();
831: }
832: parent = parent->parent;
833: break;
1.63 schwarze 834: case EQN_TOK_FWD:
835: case EQN_TOK_BACK:
836: case EQN_TOK_DOWN:
837: case EQN_TOK_UP:
1.52 schwarze 838: subtok = eqn_tok_parse(ep, NULL);
839: if (subtok != EQN_TOK__MAX) {
840: mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
841: ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
842: tok = subtok;
843: goto this_tok;
1.48 kristaps 844: }
845: break;
1.63 schwarze 846: case EQN_TOK_FAT:
847: case EQN_TOK_ROMAN:
848: case EQN_TOK_ITALIC:
849: case EQN_TOK_BOLD:
1.48 kristaps 850: while (parent->args == parent->expectargs)
1.52 schwarze 851: parent = parent->parent;
1.48 kristaps 852: /*
853: * These values apply to the next word or sequence of
854: * words; thus, we mark that we'll have a child with
855: * exactly one of those.
856: */
857: parent = eqn_box_alloc(ep, parent);
858: parent->type = EQN_LISTONE;
859: parent->expectargs = 1;
860: switch (tok) {
1.63 schwarze 861: case EQN_TOK_FAT:
1.48 kristaps 862: parent->font = EQNFONT_FAT;
863: break;
1.63 schwarze 864: case EQN_TOK_ROMAN:
1.48 kristaps 865: parent->font = EQNFONT_ROMAN;
866: break;
1.63 schwarze 867: case EQN_TOK_ITALIC:
1.48 kristaps 868: parent->font = EQNFONT_ITALIC;
869: break;
1.63 schwarze 870: case EQN_TOK_BOLD:
1.48 kristaps 871: parent->font = EQNFONT_BOLD;
872: break;
873: default:
874: abort();
875: }
876: break;
1.63 schwarze 877: case EQN_TOK_SIZE:
878: case EQN_TOK_GSIZE:
1.48 kristaps 879: /* Accept two values: integral size and a single. */
880: if (NULL == (start = eqn_nexttok(ep, &sz))) {
1.52 schwarze 881: mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
882: ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
883: break;
1.48 kristaps 884: }
885: size = mandoc_strntoi(start, sz, 10);
886: if (-1 == size) {
1.52 schwarze 887: mandoc_msg(MANDOCERR_IT_NONUM, ep->parse,
888: ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
889: break;
1.48 kristaps 890: }
891: if (EQN_TOK_GSIZE == tok) {
892: ep->gsize = size;
893: break;
894: }
895: parent = eqn_box_alloc(ep, parent);
896: parent->type = EQN_LISTONE;
897: parent->expectargs = 1;
898: parent->size = size;
899: break;
1.63 schwarze 900: case EQN_TOK_FROM:
901: case EQN_TOK_TO:
902: case EQN_TOK_SUB:
903: case EQN_TOK_SUP:
1.48 kristaps 904: /*
905: * We have a left-right-associative expression.
906: * Repivot under a positional node, open a child scope
907: * and keep on reading.
908: */
1.52 schwarze 909: if (parent->last == NULL) {
910: mandoc_msg(MANDOCERR_EQN_NOBOX, ep->parse,
911: ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
912: cur = eqn_box_alloc(ep, parent);
913: cur->type = EQN_TEXT;
914: cur->text = mandoc_strdup("");
1.48 kristaps 915: }
916: /* Handle the "subsup" and "fromto" positions. */
917: if (EQN_TOK_SUP == tok && parent->pos == EQNPOS_SUB) {
918: parent->expectargs = 3;
919: parent->pos = EQNPOS_SUBSUP;
920: break;
921: }
922: if (EQN_TOK_TO == tok && parent->pos == EQNPOS_FROM) {
923: parent->expectargs = 3;
924: parent->pos = EQNPOS_FROMTO;
925: break;
926: }
927: switch (tok) {
1.63 schwarze 928: case EQN_TOK_FROM:
1.48 kristaps 929: pos = EQNPOS_FROM;
930: break;
1.63 schwarze 931: case EQN_TOK_TO:
1.48 kristaps 932: pos = EQNPOS_TO;
933: break;
1.63 schwarze 934: case EQN_TOK_SUP:
1.48 kristaps 935: pos = EQNPOS_SUP;
936: break;
1.63 schwarze 937: case EQN_TOK_SUB:
1.48 kristaps 938: pos = EQNPOS_SUB;
939: break;
940: default:
941: abort();
942: }
943: parent = eqn_box_makebinary(ep, pos, parent);
944: break;
1.63 schwarze 945: case EQN_TOK_SQRT:
1.48 kristaps 946: while (parent->args == parent->expectargs)
1.52 schwarze 947: parent = parent->parent;
1.51 schwarze 948: /*
1.48 kristaps 949: * Accept a left-right-associative set of arguments just
950: * like sub and sup and friends but without rebalancing
951: * under a pivot.
952: */
953: parent = eqn_box_alloc(ep, parent);
954: parent->type = EQN_SUBEXPR;
955: parent->pos = EQNPOS_SQRT;
956: parent->expectargs = 1;
957: break;
1.63 schwarze 958: case EQN_TOK_OVER:
1.48 kristaps 959: /*
960: * We have a right-left-associative fraction.
961: * Close out anything that's currently open, then
962: * rebalance and continue reading.
963: */
1.52 schwarze 964: if (parent->last == NULL) {
965: mandoc_msg(MANDOCERR_EQN_NOBOX, ep->parse,
966: ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
967: cur = eqn_box_alloc(ep, parent);
968: cur->type = EQN_TEXT;
969: cur->text = mandoc_strdup("");
1.48 kristaps 970: }
971: while (EQN_SUBEXPR == parent->type)
1.52 schwarze 972: parent = parent->parent;
1.48 kristaps 973: parent = eqn_box_makebinary(ep, EQNPOS_OVER, parent);
974: break;
1.63 schwarze 975: case EQN_TOK_RIGHT:
976: case EQN_TOK_BRACE_CLOSE:
1.48 kristaps 977: /*
978: * Close out the existing brace.
979: * FIXME: this is a shitty sentinel: we should really
980: * have a native EQN_BRACE type or whatnot.
981: */
1.52 schwarze 982: for (cur = parent; cur != NULL; cur = cur->parent)
983: if (cur->type == EQN_LIST &&
984: (tok == EQN_TOK_BRACE_CLOSE ||
985: cur->left != NULL))
986: break;
987: if (cur == NULL) {
988: mandoc_msg(MANDOCERR_BLK_NOTOPEN, ep->parse,
989: ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
990: break;
991: }
992: parent = cur;
1.48 kristaps 993: if (EQN_TOK_RIGHT == tok) {
994: if (NULL == (start = eqn_nexttok(ep, &sz))) {
1.52 schwarze 995: mandoc_msg(MANDOCERR_REQ_EMPTY,
996: ep->parse, ep->eqn.ln,
997: ep->eqn.pos, eqn_toks[tok]);
998: break;
1.48 kristaps 999: }
1000: /* Handling depends on right/left. */
1001: if (STRNEQ(start, sz, "ceiling", 7)) {
1002: strlcpy(sym, "\\[rc]", sizeof(sym));
1003: parent->right = mandoc_strdup(sym);
1004: } else if (STRNEQ(start, sz, "floor", 5)) {
1005: strlcpy(sym, "\\[rf]", sizeof(sym));
1006: parent->right = mandoc_strdup(sym);
1.51 schwarze 1007: } else
1.48 kristaps 1008: parent->right = mandoc_strndup(start, sz);
1009: }
1.52 schwarze 1010: parent = parent->parent;
1.61 schwarze 1011: if (tok == EQN_TOK_BRACE_CLOSE &&
1.51 schwarze 1012: (parent->type == EQN_PILE ||
1013: parent->type == EQN_MATRIX))
1.48 kristaps 1014: parent = parent->parent;
1015: /* Close out any "singleton" lists. */
1.51 schwarze 1016: while (parent->type == EQN_LISTONE &&
1017: parent->args == parent->expectargs)
1.52 schwarze 1018: parent = parent->parent;
1.48 kristaps 1019: break;
1.63 schwarze 1020: case EQN_TOK_BRACE_OPEN:
1021: case EQN_TOK_LEFT:
1.48 kristaps 1022: /*
1023: * If we already have something in the stack and we're
1024: * in an expression, then rewind til we're not any more
1025: * (just like with the text node).
1026: */
1027: while (parent->args == parent->expectargs)
1.52 schwarze 1028: parent = parent->parent;
1029: if (EQN_TOK_LEFT == tok &&
1030: (start = eqn_nexttok(ep, &sz)) == NULL) {
1031: mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
1032: ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
1033: break;
1034: }
1.48 kristaps 1035: parent = eqn_box_alloc(ep, parent);
1036: parent->type = EQN_LIST;
1037: if (EQN_TOK_LEFT == tok) {
1038: if (STRNEQ(start, sz, "ceiling", 7)) {
1039: strlcpy(sym, "\\[lc]", sizeof(sym));
1040: parent->left = mandoc_strdup(sym);
1041: } else if (STRNEQ(start, sz, "floor", 5)) {
1042: strlcpy(sym, "\\[lf]", sizeof(sym));
1043: parent->left = mandoc_strdup(sym);
1.51 schwarze 1044: } else
1.48 kristaps 1045: parent->left = mandoc_strndup(start, sz);
1046: }
1047: break;
1.63 schwarze 1048: case EQN_TOK_PILE:
1049: case EQN_TOK_LPILE:
1050: case EQN_TOK_RPILE:
1051: case EQN_TOK_CPILE:
1052: case EQN_TOK_CCOL:
1053: case EQN_TOK_LCOL:
1054: case EQN_TOK_RCOL:
1.48 kristaps 1055: while (parent->args == parent->expectargs)
1.52 schwarze 1056: parent = parent->parent;
1.48 kristaps 1057: parent = eqn_box_alloc(ep, parent);
1058: parent->type = EQN_PILE;
1.52 schwarze 1059: parent->expectargs = 1;
1.48 kristaps 1060: break;
1.63 schwarze 1061: case EQN_TOK_ABOVE:
1.52 schwarze 1062: for (cur = parent; cur != NULL; cur = cur->parent)
1063: if (cur->type == EQN_PILE)
1064: break;
1065: if (cur == NULL) {
1066: mandoc_msg(MANDOCERR_IT_STRAY, ep->parse,
1067: ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
1068: break;
1069: }
1070: parent = eqn_box_alloc(ep, cur);
1.48 kristaps 1071: parent->type = EQN_LIST;
1072: break;
1.63 schwarze 1073: case EQN_TOK_MATRIX:
1.48 kristaps 1074: while (parent->args == parent->expectargs)
1.52 schwarze 1075: parent = parent->parent;
1.48 kristaps 1076: parent = eqn_box_alloc(ep, parent);
1077: parent->type = EQN_MATRIX;
1.52 schwarze 1078: parent->expectargs = 1;
1.48 kristaps 1079: break;
1.63 schwarze 1080: case EQN_TOK_EOF:
1.48 kristaps 1081: /*
1.51 schwarze 1082: * End of file!
1.48 kristaps 1083: * TODO: make sure we're not in an open subexpression.
1084: */
1.59 schwarze 1085: return ROFF_EQN;
1.64 schwarze 1086: case EQN_TOK_FUNC:
1087: case EQN_TOK__MAX:
1088: assert(p != NULL);
1.48 kristaps 1089: /*
1090: * If we already have something in the stack and we're
1091: * in an expression, then rewind til we're not any more.
1092: */
1093: while (parent->args == parent->expectargs)
1.52 schwarze 1094: parent = parent->parent;
1.64 schwarze 1095: if (tok == EQN_TOK_FUNC) {
1096: for (cur = parent; cur != NULL; cur = cur->parent)
1097: if (cur->font != EQNFONT_NONE)
1098: break;
1099: if (cur == NULL || cur->font != EQNFONT_ROMAN) {
1100: parent = eqn_box_alloc(ep, parent);
1101: parent->type = EQN_LISTONE;
1102: parent->font = EQNFONT_ROMAN;
1103: parent->expectargs = 1;
1104: }
1105: }
1.48 kristaps 1106: cur = eqn_box_alloc(ep, parent);
1107: cur->type = EQN_TEXT;
1.65 ! schwarze 1108: cur->text = p;
1.8 kristaps 1109:
1.48 kristaps 1110: /*
1111: * Post-process list status.
1112: */
1.51 schwarze 1113: while (parent->type == EQN_LISTONE &&
1.52 schwarze 1114: parent->args == parent->expectargs)
1115: parent = parent->parent;
1.48 kristaps 1116: break;
1.64 schwarze 1117: default:
1118: abort();
1.40 schwarze 1119: }
1.52 schwarze 1120: goto next_tok;
1.29 kristaps 1121: }
1122:
1.48 kristaps 1123: enum rofferr
1.51 schwarze 1124: eqn_end(struct eqn_node **epp)
1.8 kristaps 1125: {
1.48 kristaps 1126: struct eqn_node *ep;
1.8 kristaps 1127:
1.48 kristaps 1128: ep = *epp;
1129: *epp = NULL;
1.8 kristaps 1130:
1.48 kristaps 1131: ep->eqn.root = mandoc_calloc(1, sizeof(struct eqn_box));
1132: ep->eqn.root->expectargs = UINT_MAX;
1.59 schwarze 1133: return eqn_parse(ep, ep->eqn.root);
1.12 kristaps 1134: }
1135:
1.48 kristaps 1136: void
1137: eqn_free(struct eqn_node *p)
1.12 kristaps 1138: {
1139: int i;
1.8 kristaps 1140:
1.48 kristaps 1141: eqn_box_free(p->eqn.root);
1142:
1143: for (i = 0; i < (int)p->defsz; i++) {
1144: free(p->defs[i].key);
1145: free(p->defs[i].val);
1146: }
1.8 kristaps 1147:
1.48 kristaps 1148: free(p->data);
1149: free(p->defs);
1150: free(p);
1.1 kristaps 1151: }
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