Annotation of mandoc/eqn.c, Revision 1.37
1.37 ! kristaps 1: /* $Id: eqn.c,v 1.36 2011/07/23 18:41:18 kristaps Exp $ */
1.1 kristaps 2: /*
3: * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16: */
17: #ifdef HAVE_CONFIG_H
18: #include "config.h"
19: #endif
20:
21: #include <assert.h>
1.19 kristaps 22: #include <limits.h>
1.1 kristaps 23: #include <stdio.h>
24: #include <stdlib.h>
25: #include <string.h>
26: #include <time.h>
27:
28: #include "mandoc.h"
29: #include "libmandoc.h"
30: #include "libroff.h"
31:
1.11 kristaps 32: #define EQN_NEST_MAX 128 /* maximum nesting of defines */
1.12 kristaps 33: #define EQN_MSG(t, x) mandoc_msg((t), (x)->parse, (x)->eqn.ln, (x)->eqn.pos, NULL)
1.8 kristaps 34:
1.20 kristaps 35: enum eqn_rest {
36: EQN_DESCOPE,
37: EQN_ERR,
38: EQN_OK,
39: EQN_EOF
40: };
41:
1.27 kristaps 42: enum eqn_symt {
43: EQNSYM_alpha,
44: EQNSYM_beta,
45: EQNSYM_chi,
46: EQNSYM_delta,
47: EQNSYM_epsilon,
48: EQNSYM_eta,
49: EQNSYM_gamma,
50: EQNSYM_iota,
51: EQNSYM_kappa,
52: EQNSYM_lambda,
53: EQNSYM_mu,
54: EQNSYM_nu,
55: EQNSYM_omega,
56: EQNSYM_omicron,
57: EQNSYM_phi,
58: EQNSYM_pi,
59: EQNSYM_ps,
60: EQNSYM_rho,
61: EQNSYM_sigma,
62: EQNSYM_tau,
63: EQNSYM_theta,
64: EQNSYM_upsilon,
65: EQNSYM_xi,
66: EQNSYM_zeta,
67: EQNSYM_DELTA,
68: EQNSYM_GAMMA,
69: EQNSYM_LAMBDA,
70: EQNSYM_OMEGA,
71: EQNSYM_PHI,
72: EQNSYM_PI,
73: EQNSYM_PSI,
74: EQNSYM_SIGMA,
75: EQNSYM_THETA,
76: EQNSYM_UPSILON,
77: EQNSYM_XI,
1.28 kristaps 78: EQNSYM_inter,
79: EQNSYM_union,
80: EQNSYM_prod,
81: EQNSYM_int,
82: EQNSYM_sum,
83: EQNSYM_grad,
84: EQNSYM_del,
85: EQNSYM_times,
86: EQNSYM_cdot,
87: EQNSYM_nothing,
88: EQNSYM_approx,
89: EQNSYM_prime,
90: EQNSYM_half,
91: EQNSYM_partial,
92: EQNSYM_inf,
93: EQNSYM_muchgreat,
94: EQNSYM_muchless,
95: EQNSYM_larrow,
96: EQNSYM_rarrow,
97: EQNSYM_pm,
98: EQNSYM_nequal,
99: EQNSYM_equiv,
100: EQNSYM_lessequal,
101: EQNSYM_moreequal,
1.27 kristaps 102: EQNSYM__MAX
103: };
104:
1.36 kristaps 105: enum eqnpartt {
106: EQN_DEFINE = 0,
107: EQN_NDEFINE,
108: EQN_TDEFINE,
109: EQN_SET,
110: EQN_UNDEF,
111: EQN_GFONT,
112: EQN_GSIZE,
113: EQN_BACK,
114: EQN_FWD,
115: EQN_UP,
116: EQN_DOWN,
117: EQN__MAX
118: };
119:
1.17 kristaps 120: struct eqnstr {
1.8 kristaps 121: const char *name;
122: size_t sz;
123: };
124:
1.24 kristaps 125: #define STRNEQ(p1, sz1, p2, sz2) \
1.25 kristaps 126: ((sz1) == (sz2) && 0 == strncmp((p1), (p2), (sz1)))
1.24 kristaps 127: #define EQNSTREQ(x, p, sz) \
128: STRNEQ((x)->name, (x)->sz, (p), (sz))
129:
1.17 kristaps 130: struct eqnpart {
131: struct eqnstr str;
132: int (*fp)(struct eqn_node *);
1.16 kristaps 133: };
134:
1.27 kristaps 135: struct eqnsym {
136: struct eqnstr str;
1.28 kristaps 137: const char *sym;
1.27 kristaps 138: };
139:
1.8 kristaps 140:
1.23 kristaps 141: static enum eqn_rest eqn_box(struct eqn_node *, struct eqn_box *);
1.29 kristaps 142: static struct eqn_box *eqn_box_alloc(struct eqn_node *,
143: struct eqn_box *);
1.13 kristaps 144: static void eqn_box_free(struct eqn_box *);
1.12 kristaps 145: static struct eqn_def *eqn_def_find(struct eqn_node *,
146: const char *, size_t);
1.30 kristaps 147: static int eqn_do_gfont(struct eqn_node *);
1.29 kristaps 148: static int eqn_do_gsize(struct eqn_node *);
1.12 kristaps 149: static int eqn_do_define(struct eqn_node *);
1.33 kristaps 150: static int eqn_do_ign1(struct eqn_node *);
151: static int eqn_do_ign2(struct eqn_node *);
1.36 kristaps 152: static int eqn_do_tdefine(struct eqn_node *);
1.12 kristaps 153: static int eqn_do_undef(struct eqn_node *);
1.23 kristaps 154: static enum eqn_rest eqn_eqn(struct eqn_node *, struct eqn_box *);
155: static enum eqn_rest eqn_list(struct eqn_node *, struct eqn_box *);
1.32 kristaps 156: static enum eqn_rest eqn_matrix(struct eqn_node *, struct eqn_box *);
1.12 kristaps 157: static const char *eqn_nexttok(struct eqn_node *, size_t *);
1.14 kristaps 158: static const char *eqn_nextrawtok(struct eqn_node *, size_t *);
159: static const char *eqn_next(struct eqn_node *,
160: char, size_t *, int);
1.20 kristaps 161: static void eqn_rewind(struct eqn_node *);
1.6 kristaps 162:
1.8 kristaps 163: static const struct eqnpart eqnparts[EQN__MAX] = {
1.17 kristaps 164: { { "define", 6 }, eqn_do_define }, /* EQN_DEFINE */
1.36 kristaps 165: { { "ndefine", 7 }, eqn_do_define }, /* EQN_NDEFINE */
166: { { "tdefine", 7 }, eqn_do_tdefine }, /* EQN_TDEFINE */
1.33 kristaps 167: { { "set", 3 }, eqn_do_ign2 }, /* EQN_SET */
1.17 kristaps 168: { { "undef", 5 }, eqn_do_undef }, /* EQN_UNDEF */
1.30 kristaps 169: { { "gfont", 5 }, eqn_do_gfont }, /* EQN_GFONT */
170: { { "gsize", 5 }, eqn_do_gsize }, /* EQN_GSIZE */
1.33 kristaps 171: { { "back", 4 }, eqn_do_ign1 }, /* EQN_BACK */
172: { { "fwd", 3 }, eqn_do_ign1 }, /* EQN_FWD */
173: { { "up", 2 }, eqn_do_ign1 }, /* EQN_UP */
174: { { "down", 4 }, eqn_do_ign1 }, /* EQN_DOWN */
1.8 kristaps 175: };
176:
1.17 kristaps 177: static const struct eqnstr eqnmarks[EQNMARK__MAX] = {
1.16 kristaps 178: { "", 0 }, /* EQNMARK_NONE */
179: { "dot", 3 }, /* EQNMARK_DOT */
180: { "dotdot", 6 }, /* EQNMARK_DOTDOT */
181: { "hat", 3 }, /* EQNMARK_HAT */
182: { "tilde", 5 }, /* EQNMARK_TILDE */
183: { "vec", 3 }, /* EQNMARK_VEC */
184: { "dyad", 4 }, /* EQNMARK_DYAD */
185: { "bar", 3 }, /* EQNMARK_BAR */
186: { "under", 5 }, /* EQNMARK_UNDER */
187: };
188:
1.17 kristaps 189: static const struct eqnstr eqnfonts[EQNFONT__MAX] = {
1.20 kristaps 190: { "", 0 }, /* EQNFONT_NONE */
191: { "roman", 5 }, /* EQNFONT_ROMAN */
192: { "bold", 4 }, /* EQNFONT_BOLD */
1.34 kristaps 193: { "fat", 3 }, /* EQNFONT_FAT */
1.20 kristaps 194: { "italic", 6 }, /* EQNFONT_ITALIC */
1.17 kristaps 195: };
196:
1.18 kristaps 197: static const struct eqnstr eqnposs[EQNPOS__MAX] = {
1.20 kristaps 198: { "", 0 }, /* EQNPOS_NONE */
199: { "over", 4 }, /* EQNPOS_OVER */
200: { "sup", 3 }, /* EQNPOS_SUP */
201: { "sub", 3 }, /* EQNPOS_SUB */
202: { "to", 2 }, /* EQNPOS_TO */
203: { "from", 4 }, /* EQNPOS_FROM */
204: };
205:
206: static const struct eqnstr eqnpiles[EQNPILE__MAX] = {
207: { "", 0 }, /* EQNPILE_NONE */
1.37 ! kristaps 208: { "pile", 4 }, /* EQNPILE_PILE */
1.20 kristaps 209: { "cpile", 5 }, /* EQNPILE_CPILE */
210: { "rpile", 5 }, /* EQNPILE_RPILE */
211: { "lpile", 5 }, /* EQNPILE_LPILE */
1.37 ! kristaps 212: { "col", 3 }, /* EQNPILE_COL */
1.32 kristaps 213: { "ccol", 4 }, /* EQNPILE_CCOL */
214: { "rcol", 4 }, /* EQNPILE_RCOL */
215: { "lcol", 4 }, /* EQNPILE_LCOL */
1.18 kristaps 216: };
217:
1.27 kristaps 218: static const struct eqnsym eqnsyms[EQNSYM__MAX] = {
1.28 kristaps 219: { { "alpha", 5 }, "*a" }, /* EQNSYM_alpha */
220: { { "beta", 4 }, "*b" }, /* EQNSYM_beta */
221: { { "chi", 3 }, "*x" }, /* EQNSYM_chi */
222: { { "delta", 5 }, "*d" }, /* EQNSYM_delta */
223: { { "epsilon", 7 }, "*e" }, /* EQNSYM_epsilon */
224: { { "eta", 3 }, "*y" }, /* EQNSYM_eta */
225: { { "gamma", 5 }, "*g" }, /* EQNSYM_gamma */
226: { { "iota", 4 }, "*i" }, /* EQNSYM_iota */
227: { { "kappa", 5 }, "*k" }, /* EQNSYM_kappa */
228: { { "lambda", 6 }, "*l" }, /* EQNSYM_lambda */
229: { { "mu", 2 }, "*m" }, /* EQNSYM_mu */
230: { { "nu", 2 }, "*n" }, /* EQNSYM_nu */
231: { { "omega", 5 }, "*w" }, /* EQNSYM_omega */
232: { { "omicron", 7 }, "*o" }, /* EQNSYM_omicron */
233: { { "phi", 3 }, "*f" }, /* EQNSYM_phi */
234: { { "pi", 2 }, "*p" }, /* EQNSYM_pi */
235: { { "psi", 2 }, "*q" }, /* EQNSYM_psi */
236: { { "rho", 3 }, "*r" }, /* EQNSYM_rho */
237: { { "sigma", 5 }, "*s" }, /* EQNSYM_sigma */
238: { { "tau", 3 }, "*t" }, /* EQNSYM_tau */
239: { { "theta", 5 }, "*h" }, /* EQNSYM_theta */
240: { { "upsilon", 7 }, "*u" }, /* EQNSYM_upsilon */
241: { { "xi", 2 }, "*c" }, /* EQNSYM_xi */
242: { { "zeta", 4 }, "*z" }, /* EQNSYM_zeta */
243: { { "DELTA", 5 }, "*D" }, /* EQNSYM_DELTA */
244: { { "GAMMA", 5 }, "*G" }, /* EQNSYM_GAMMA */
245: { { "LAMBDA", 6 }, "*L" }, /* EQNSYM_LAMBDA */
246: { { "OMEGA", 5 }, "*W" }, /* EQNSYM_OMEGA */
247: { { "PHI", 3 }, "*F" }, /* EQNSYM_PHI */
248: { { "PI", 2 }, "*P" }, /* EQNSYM_PI */
249: { { "PSI", 3 }, "*Q" }, /* EQNSYM_PSI */
250: { { "SIGMA", 5 }, "*S" }, /* EQNSYM_SIGMA */
251: { { "THETA", 5 }, "*H" }, /* EQNSYM_THETA */
252: { { "UPSILON", 7 }, "*U" }, /* EQNSYM_UPSILON */
253: { { "XI", 2 }, "*C" }, /* EQNSYM_XI */
254: { { "inter", 5 }, "ca" }, /* EQNSYM_inter */
255: { { "union", 5 }, "cu" }, /* EQNSYM_union */
256: { { "prod", 4 }, "product" }, /* EQNSYM_prod */
257: { { "int", 3 }, "integral" }, /* EQNSYM_int */
258: { { "sum", 3 }, "sum" }, /* EQNSYM_sum */
259: { { "grad", 4 }, "gr" }, /* EQNSYM_grad */
260: { { "del", 3 }, "gr" }, /* EQNSYM_del */
261: { { "times", 5 }, "mu" }, /* EQNSYM_times */
262: { { "cdot", 4 }, "pc" }, /* EQNSYM_cdot */
263: { { "nothing", 7 }, "&" }, /* EQNSYM_nothing */
264: { { "approx", 6 }, "~~" }, /* EQNSYM_approx */
265: { { "prime", 5 }, "aq" }, /* EQNSYM_prime */
266: { { "half", 4 }, "12" }, /* EQNSYM_half */
267: { { "partial", 7 }, "pd" }, /* EQNSYM_partial */
268: { { "inf", 3 }, "if" }, /* EQNSYM_inf */
269: { { ">>", 2 }, ">>" }, /* EQNSYM_muchgreat */
270: { { "<<", 2 }, "<<" }, /* EQNSYM_muchless */
271: { { "<-", 2 }, "<-" }, /* EQNSYM_larrow */
272: { { "->", 2 }, "->" }, /* EQNSYM_rarrow */
273: { { "+-", 2 }, "+-" }, /* EQNSYM_pm */
274: { { "!=", 2 }, "!=" }, /* EQNSYM_nequal */
275: { { "==", 2 }, "==" }, /* EQNSYM_equiv */
276: { { "<=", 2 }, "<=" }, /* EQNSYM_lessequal */
277: { { ">=", 2 }, ">=" }, /* EQNSYM_moreequal */
1.27 kristaps 278: };
279:
1.1 kristaps 280: /* ARGSUSED */
281: enum rofferr
1.6 kristaps 282: eqn_read(struct eqn_node **epp, int ln,
283: const char *p, int pos, int *offs)
1.1 kristaps 284: {
1.8 kristaps 285: size_t sz;
286: struct eqn_node *ep;
1.12 kristaps 287: enum rofferr er;
288:
289: ep = *epp;
290:
291: /*
292: * If we're the terminating mark, unset our equation status and
293: * validate the full equation.
294: */
1.1 kristaps 295:
1.35 kristaps 296: if (0 == strncmp(p, ".EN", 3)) {
1.12 kristaps 297: er = eqn_end(ep);
1.1 kristaps 298: *epp = NULL;
1.35 kristaps 299: p += 3;
300: while (' ' == *p || '\t' == *p)
301: p++;
302: if ('\0' == *p)
303: return(er);
304: mandoc_msg(MANDOCERR_ARGSLOST, ep->parse, ln, pos, NULL);
1.12 kristaps 305: return(er);
1.1 kristaps 306: }
307:
1.12 kristaps 308: /*
309: * Build up the full string, replacing all newlines with regular
310: * whitespace.
311: */
1.6 kristaps 312:
1.12 kristaps 313: sz = strlen(p + pos) + 1;
314: ep->data = mandoc_realloc(ep->data, ep->sz + sz + 1);
1.6 kristaps 315:
1.12 kristaps 316: /* First invocation: nil terminate the string. */
1.8 kristaps 317:
1.12 kristaps 318: if (0 == ep->sz)
319: *ep->data = '\0';
1.8 kristaps 320:
1.12 kristaps 321: ep->sz += sz;
322: strlcat(ep->data, p + pos, ep->sz + 1);
323: strlcat(ep->data, " ", ep->sz + 1);
1.11 kristaps 324: return(ROFF_IGN);
325: }
326:
1.1 kristaps 327: struct eqn_node *
1.36 kristaps 328: eqn_alloc(const char *name, int pos, int line, struct mparse *parse)
1.1 kristaps 329: {
330: struct eqn_node *p;
1.36 kristaps 331: size_t sz;
332: const char *end;
1.1 kristaps 333:
334: p = mandoc_calloc(1, sizeof(struct eqn_node));
1.36 kristaps 335:
336: if ('\0' != *name) {
337: sz = strlen(name);
338: assert(sz);
339: do {
340: sz--;
341: end = name + (int)sz;
342: } while (' ' == *end || '\t' == *end);
343: p->eqn.name = mandoc_strndup(name, sz + 1);
344: }
345:
1.5 kristaps 346: p->parse = parse;
1.12 kristaps 347: p->eqn.ln = line;
1.2 kristaps 348: p->eqn.pos = pos;
1.29 kristaps 349: p->gsize = EQN_DEFSIZE;
1.1 kristaps 350:
351: return(p);
352: }
353:
1.12 kristaps 354: enum rofferr
355: eqn_end(struct eqn_node *ep)
356: {
1.20 kristaps 357: struct eqn_box *root;
358: enum eqn_rest c;
359:
360: ep->eqn.root = mandoc_calloc(1, sizeof(struct eqn_box));
1.13 kristaps 361:
1.20 kristaps 362: root = ep->eqn.root;
1.13 kristaps 363: root->type = EQN_ROOT;
364:
365: if (0 == ep->sz)
366: return(ROFF_IGN);
1.12 kristaps 367:
1.20 kristaps 368: if (EQN_DESCOPE == (c = eqn_eqn(ep, root))) {
369: EQN_MSG(MANDOCERR_EQNNSCOPE, ep);
370: c = EQN_ERR;
371: }
372:
373: return(EQN_EOF == c ? ROFF_EQN : ROFF_IGN);
374: }
375:
376: static enum eqn_rest
377: eqn_eqn(struct eqn_node *ep, struct eqn_box *last)
378: {
379: struct eqn_box *bp;
380: enum eqn_rest c;
381:
1.29 kristaps 382: bp = eqn_box_alloc(ep, last);
1.20 kristaps 383: bp->type = EQN_SUBEXPR;
1.12 kristaps 384:
1.20 kristaps 385: while (EQN_OK == (c = eqn_box(ep, bp)))
386: /* Spin! */ ;
1.15 kristaps 387:
1.20 kristaps 388: return(c);
1.12 kristaps 389: }
390:
1.20 kristaps 391: static enum eqn_rest
1.32 kristaps 392: eqn_matrix(struct eqn_node *ep, struct eqn_box *last)
393: {
394: struct eqn_box *bp;
395: const char *start;
396: size_t sz;
397: enum eqn_rest c;
398:
399: bp = eqn_box_alloc(ep, last);
400: bp->type = EQN_MATRIX;
401:
402: if (NULL == (start = eqn_nexttok(ep, &sz))) {
403: EQN_MSG(MANDOCERR_EQNEOF, ep);
404: return(EQN_ERR);
405: }
406: if ( ! STRNEQ(start, sz, "{", 1)) {
407: EQN_MSG(MANDOCERR_EQNSYNT, ep);
408: return(EQN_ERR);
409: }
410:
411: while (EQN_OK == (c = eqn_box(ep, bp)))
412: switch (bp->last->pile) {
413: case (EQNPILE_LCOL):
414: /* FALLTHROUGH */
415: case (EQNPILE_CCOL):
416: /* FALLTHROUGH */
417: case (EQNPILE_RCOL):
418: continue;
419: default:
420: EQN_MSG(MANDOCERR_EQNSYNT, ep);
421: return(EQN_ERR);
422: };
423:
424: if (EQN_DESCOPE != c) {
425: if (EQN_EOF == c)
426: EQN_MSG(MANDOCERR_EQNEOF, ep);
427: return(EQN_ERR);
428: }
429:
430: eqn_rewind(ep);
431: start = eqn_nexttok(ep, &sz);
432: assert(start);
433: if (STRNEQ(start, sz, "}", 1))
434: return(EQN_OK);
435:
436: EQN_MSG(MANDOCERR_EQNBADSCOPE, ep);
437: return(EQN_ERR);
438: }
439:
440: static enum eqn_rest
1.23 kristaps 441: eqn_list(struct eqn_node *ep, struct eqn_box *last)
442: {
443: struct eqn_box *bp;
444: const char *start;
445: size_t sz;
446: enum eqn_rest c;
447:
1.29 kristaps 448: bp = eqn_box_alloc(ep, last);
1.23 kristaps 449: bp->type = EQN_LIST;
450:
451: if (NULL == (start = eqn_nexttok(ep, &sz))) {
452: EQN_MSG(MANDOCERR_EQNEOF, ep);
453: return(EQN_ERR);
454: }
1.24 kristaps 455: if ( ! STRNEQ(start, sz, "{", 1)) {
1.23 kristaps 456: EQN_MSG(MANDOCERR_EQNSYNT, ep);
457: return(EQN_ERR);
458: }
459:
460: while (EQN_DESCOPE == (c = eqn_eqn(ep, bp))) {
461: eqn_rewind(ep);
462: start = eqn_nexttok(ep, &sz);
463: assert(start);
1.24 kristaps 464: if ( ! STRNEQ(start, sz, "above", 5))
1.23 kristaps 465: break;
466: }
467:
468: if (EQN_DESCOPE != c) {
469: if (EQN_ERR != c)
470: EQN_MSG(MANDOCERR_EQNSCOPE, ep);
471: return(EQN_ERR);
472: }
473:
474: eqn_rewind(ep);
475: start = eqn_nexttok(ep, &sz);
476: assert(start);
1.24 kristaps 477: if (STRNEQ(start, sz, "}", 1))
1.23 kristaps 478: return(EQN_OK);
479:
480: EQN_MSG(MANDOCERR_EQNBADSCOPE, ep);
481: return(EQN_ERR);
482: }
483:
484: static enum eqn_rest
1.20 kristaps 485: eqn_box(struct eqn_node *ep, struct eqn_box *last)
1.1 kristaps 486: {
1.12 kristaps 487: size_t sz;
488: const char *start;
1.20 kristaps 489: char *left;
1.28 kristaps 490: char sym[64];
1.20 kristaps 491: enum eqn_rest c;
492: int i, size;
1.13 kristaps 493: struct eqn_box *bp;
1.12 kristaps 494:
1.20 kristaps 495: if (NULL == (start = eqn_nexttok(ep, &sz)))
496: return(EQN_EOF);
497:
1.24 kristaps 498: if (STRNEQ(start, sz, "}", 1))
1.20 kristaps 499: return(EQN_DESCOPE);
1.24 kristaps 500: else if (STRNEQ(start, sz, "right", 5))
1.20 kristaps 501: return(EQN_DESCOPE);
1.24 kristaps 502: else if (STRNEQ(start, sz, "above", 5))
1.20 kristaps 503: return(EQN_DESCOPE);
1.33 kristaps 504: else if (STRNEQ(start, sz, "mark", 4))
505: return(EQN_OK);
506: else if (STRNEQ(start, sz, "lineup", 6))
507: return(EQN_OK);
1.20 kristaps 508:
509: for (i = 0; i < (int)EQN__MAX; i++) {
1.24 kristaps 510: if ( ! EQNSTREQ(&eqnparts[i].str, start, sz))
1.20 kristaps 511: continue;
1.36 kristaps 512: return((*eqnparts[i].fp)(ep) ?
513: EQN_OK : EQN_ERR);
1.20 kristaps 514: }
1.15 kristaps 515:
1.24 kristaps 516: if (STRNEQ(start, sz, "{", 1)) {
1.20 kristaps 517: if (EQN_DESCOPE != (c = eqn_eqn(ep, last))) {
518: if (EQN_ERR != c)
519: EQN_MSG(MANDOCERR_EQNSCOPE, ep);
520: return(EQN_ERR);
521: }
522: eqn_rewind(ep);
523: start = eqn_nexttok(ep, &sz);
524: assert(start);
1.24 kristaps 525: if (STRNEQ(start, sz, "}", 1))
1.20 kristaps 526: return(EQN_OK);
527: EQN_MSG(MANDOCERR_EQNBADSCOPE, ep);
528: return(EQN_ERR);
529: }
1.12 kristaps 530:
1.20 kristaps 531: for (i = 0; i < (int)EQNPILE__MAX; i++) {
1.24 kristaps 532: if ( ! EQNSTREQ(&eqnpiles[i], start, sz))
1.17 kristaps 533: continue;
1.23 kristaps 534: if (EQN_OK == (c = eqn_list(ep, last)))
1.21 kristaps 535: last->last->pile = (enum eqn_pilet)i;
1.23 kristaps 536: return(c);
1.18 kristaps 537: }
1.32 kristaps 538:
539: if (STRNEQ(start, sz, "matrix", 6))
540: return(eqn_matrix(ep, last));
1.18 kristaps 541:
1.24 kristaps 542: if (STRNEQ(start, sz, "left", 4)) {
1.20 kristaps 543: if (NULL == (start = eqn_nexttok(ep, &sz))) {
544: EQN_MSG(MANDOCERR_EQNEOF, ep);
545: return(EQN_ERR);
546: }
547: left = mandoc_strndup(start, sz);
1.26 kristaps 548: c = eqn_eqn(ep, last);
549: if (last->last)
550: last->last->left = left;
551: else
552: free(left);
553: if (EQN_DESCOPE != c)
1.20 kristaps 554: return(c);
555: assert(last->last);
556: eqn_rewind(ep);
557: start = eqn_nexttok(ep, &sz);
558: assert(start);
1.26 kristaps 559: if ( ! STRNEQ(start, sz, "right", 5))
1.20 kristaps 560: return(EQN_DESCOPE);
561: if (NULL == (start = eqn_nexttok(ep, &sz))) {
562: EQN_MSG(MANDOCERR_EQNEOF, ep);
563: return(EQN_ERR);
564: }
565: last->last->right = mandoc_strndup(start, sz);
566: return(EQN_OK);
567: }
568:
569: for (i = 0; i < (int)EQNPOS__MAX; i++) {
1.24 kristaps 570: if ( ! EQNSTREQ(&eqnposs[i], start, sz))
1.18 kristaps 571: continue;
1.20 kristaps 572: if (NULL == last->last) {
573: EQN_MSG(MANDOCERR_EQNSYNT, ep);
574: return(EQN_ERR);
575: }
576: last->last->pos = (enum eqn_post)i;
577: if (EQN_EOF == (c = eqn_box(ep, last))) {
578: EQN_MSG(MANDOCERR_EQNEOF, ep);
579: return(EQN_ERR);
580: }
581: return(c);
1.17 kristaps 582: }
583:
1.16 kristaps 584: for (i = 0; i < (int)EQNMARK__MAX; i++) {
1.24 kristaps 585: if ( ! EQNSTREQ(&eqnmarks[i], start, sz))
1.16 kristaps 586: continue;
1.20 kristaps 587: if (NULL == last->last) {
588: EQN_MSG(MANDOCERR_EQNSYNT, ep);
589: return(EQN_ERR);
590: }
591: last->last->mark = (enum eqn_markt)i;
592: if (EQN_EOF == (c = eqn_box(ep, last))) {
593: EQN_MSG(MANDOCERR_EQNEOF, ep);
594: return(EQN_ERR);
595: }
596: return(c);
1.16 kristaps 597: }
1.12 kristaps 598:
1.20 kristaps 599: for (i = 0; i < (int)EQNFONT__MAX; i++) {
1.24 kristaps 600: if ( ! EQNSTREQ(&eqnfonts[i], start, sz))
1.20 kristaps 601: continue;
602: if (EQN_EOF == (c = eqn_box(ep, last))) {
603: EQN_MSG(MANDOCERR_EQNEOF, ep);
604: return(EQN_ERR);
605: } else if (EQN_OK == c)
606: last->last->font = (enum eqn_fontt)i;
607: return(c);
1.19 kristaps 608: }
1.15 kristaps 609:
1.24 kristaps 610: if (STRNEQ(start, sz, "size", 4)) {
1.20 kristaps 611: if (NULL == (start = eqn_nexttok(ep, &sz))) {
612: EQN_MSG(MANDOCERR_EQNEOF, ep);
613: return(EQN_ERR);
614: }
615: size = mandoc_strntoi(start, sz, 10);
616: if (EQN_EOF == (c = eqn_box(ep, last))) {
617: EQN_MSG(MANDOCERR_EQNEOF, ep);
618: return(EQN_ERR);
619: } else if (EQN_OK != c)
620: return(c);
621: last->last->size = size;
1.15 kristaps 622: }
623:
1.29 kristaps 624: bp = eqn_box_alloc(ep, last);
1.15 kristaps 625: bp->type = EQN_TEXT;
1.27 kristaps 626: for (i = 0; i < (int)EQNSYM__MAX; i++)
627: if (EQNSTREQ(&eqnsyms[i].str, start, sz)) {
1.28 kristaps 628: sym[63] = '\0';
629: snprintf(sym, 62, "\\[%s]", eqnsyms[i].sym);
1.27 kristaps 630: bp->text = mandoc_strdup(sym);
631: return(EQN_OK);
632: }
633:
1.20 kristaps 634: bp->text = mandoc_strndup(start, sz);
635: return(EQN_OK);
1.1 kristaps 636: }
637:
638: void
639: eqn_free(struct eqn_node *p)
640: {
1.6 kristaps 641: int i;
1.1 kristaps 642:
1.13 kristaps 643: eqn_box_free(p->eqn.root);
1.6 kristaps 644:
645: for (i = 0; i < (int)p->defsz; i++) {
646: free(p->defs[i].key);
647: free(p->defs[i].val);
648: }
649:
1.36 kristaps 650: free(p->eqn.name);
1.12 kristaps 651: free(p->data);
1.6 kristaps 652: free(p->defs);
1.1 kristaps 653: free(p);
1.6 kristaps 654: }
655:
1.20 kristaps 656: static struct eqn_box *
1.29 kristaps 657: eqn_box_alloc(struct eqn_node *ep, struct eqn_box *parent)
1.20 kristaps 658: {
659: struct eqn_box *bp;
660:
661: bp = mandoc_calloc(1, sizeof(struct eqn_box));
662: bp->parent = parent;
1.29 kristaps 663: bp->size = ep->gsize;
1.20 kristaps 664:
665: if (NULL == parent->first)
666: parent->first = bp;
667: else
668: parent->last->next = bp;
669:
670: parent->last = bp;
671: return(bp);
672: }
673:
1.13 kristaps 674: static void
675: eqn_box_free(struct eqn_box *bp)
676: {
677:
1.20 kristaps 678: if (bp->first)
679: eqn_box_free(bp->first);
1.13 kristaps 680: if (bp->next)
681: eqn_box_free(bp->next);
682:
683: free(bp->text);
1.20 kristaps 684: free(bp->left);
685: free(bp->right);
1.13 kristaps 686: free(bp);
687: }
688:
1.6 kristaps 689: static const char *
1.14 kristaps 690: eqn_nextrawtok(struct eqn_node *ep, size_t *sz)
691: {
692:
693: return(eqn_next(ep, '"', sz, 0));
694: }
695:
696: static const char *
1.12 kristaps 697: eqn_nexttok(struct eqn_node *ep, size_t *sz)
698: {
699:
1.14 kristaps 700: return(eqn_next(ep, '"', sz, 1));
1.12 kristaps 701: }
702:
1.20 kristaps 703: static void
704: eqn_rewind(struct eqn_node *ep)
705: {
706:
707: ep->cur = ep->rew;
708: }
709:
1.12 kristaps 710: static const char *
1.14 kristaps 711: eqn_next(struct eqn_node *ep, char quote, size_t *sz, int repl)
1.6 kristaps 712: {
1.12 kristaps 713: char *start, *next;
714: int q, diff, lim;
1.22 kristaps 715: size_t ssz, dummy;
1.12 kristaps 716: struct eqn_def *def;
717:
718: if (NULL == sz)
1.22 kristaps 719: sz = &dummy;
1.6 kristaps 720:
1.13 kristaps 721: lim = 0;
1.20 kristaps 722: ep->rew = ep->cur;
1.13 kristaps 723: again:
724: /* Prevent self-definitions. */
725:
726: if (lim >= EQN_NEST_MAX) {
1.36 kristaps 727: EQN_MSG(MANDOCERR_ROFFLOOP, ep);
1.13 kristaps 728: return(NULL);
729: }
730:
1.20 kristaps 731: ep->cur = ep->rew;
1.12 kristaps 732: start = &ep->data[(int)ep->cur];
1.6 kristaps 733: q = 0;
734:
735: if ('\0' == *start)
736: return(NULL);
737:
1.12 kristaps 738: if (quote == *start) {
739: ep->cur++;
1.6 kristaps 740: q = 1;
741: }
742:
1.12 kristaps 743: start = &ep->data[(int)ep->cur];
1.22 kristaps 744:
745: if ( ! q) {
746: if ('{' == *start || '}' == *start)
747: ssz = 1;
748: else
1.31 kristaps 749: ssz = strcspn(start + 1, " ^~\"{}\t") + 1;
1.22 kristaps 750: next = start + (int)ssz;
751: if ('\0' == *next)
752: next = NULL;
753: } else
754: next = strchr(start, quote);
1.12 kristaps 755:
756: if (NULL != next) {
757: *sz = (size_t)(next - start);
758: ep->cur += *sz;
1.6 kristaps 759: if (q)
1.12 kristaps 760: ep->cur++;
1.22 kristaps 761: while (' ' == ep->data[(int)ep->cur] ||
762: '\t' == ep->data[(int)ep->cur] ||
1.31 kristaps 763: '^' == ep->data[(int)ep->cur] ||
1.22 kristaps 764: '~' == ep->data[(int)ep->cur])
1.12 kristaps 765: ep->cur++;
1.6 kristaps 766: } else {
767: if (q)
1.12 kristaps 768: EQN_MSG(MANDOCERR_BADQUOTE, ep);
769: next = strchr(start, '\0');
770: *sz = (size_t)(next - start);
771: ep->cur += *sz;
772: }
773:
1.13 kristaps 774: /* Quotes aren't expanded for values. */
775:
1.14 kristaps 776: if (q || ! repl)
1.13 kristaps 777: return(start);
778:
1.12 kristaps 779: if (NULL != (def = eqn_def_find(ep, start, *sz))) {
780: diff = def->valsz - *sz;
781:
782: if (def->valsz > *sz) {
783: ep->sz += diff;
784: ep->data = mandoc_realloc(ep->data, ep->sz + 1);
785: ep->data[ep->sz] = '\0';
1.20 kristaps 786: start = &ep->data[(int)ep->rew];
1.12 kristaps 787: }
788:
789: diff = def->valsz - *sz;
790: memmove(start + *sz + diff, start + *sz,
791: (strlen(start) - *sz) + 1);
792: memcpy(start, def->val, def->valsz);
793: goto again;
1.6 kristaps 794: }
795:
796: return(start);
1.8 kristaps 797: }
798:
799: static int
1.33 kristaps 800: eqn_do_ign1(struct eqn_node *ep)
801: {
802:
1.36 kristaps 803: if (NULL == eqn_nextrawtok(ep, NULL))
1.33 kristaps 804: EQN_MSG(MANDOCERR_EQNEOF, ep);
805: else
806: return(1);
807:
808: return(0);
809: }
810:
811: static int
812: eqn_do_ign2(struct eqn_node *ep)
1.8 kristaps 813: {
814:
1.36 kristaps 815: if (NULL == eqn_nextrawtok(ep, NULL))
816: EQN_MSG(MANDOCERR_EQNEOF, ep);
817: else if (NULL == eqn_nextrawtok(ep, NULL))
818: EQN_MSG(MANDOCERR_EQNEOF, ep);
819: else
820: return(1);
821:
822: return(0);
823: }
824:
825: static int
826: eqn_do_tdefine(struct eqn_node *ep)
827: {
828:
829: if (NULL == eqn_nextrawtok(ep, NULL))
1.29 kristaps 830: EQN_MSG(MANDOCERR_EQNEOF, ep);
1.36 kristaps 831: else if (NULL == eqn_next(ep, ep->data[(int)ep->cur], NULL, 0))
1.29 kristaps 832: EQN_MSG(MANDOCERR_EQNEOF, ep);
1.12 kristaps 833: else
834: return(1);
1.8 kristaps 835:
1.12 kristaps 836: return(0);
1.8 kristaps 837: }
838:
839: static int
1.12 kristaps 840: eqn_do_define(struct eqn_node *ep)
1.8 kristaps 841: {
842: const char *start;
843: size_t sz;
1.12 kristaps 844: struct eqn_def *def;
1.8 kristaps 845: int i;
846:
1.14 kristaps 847: if (NULL == (start = eqn_nextrawtok(ep, &sz))) {
1.29 kristaps 848: EQN_MSG(MANDOCERR_EQNEOF, ep);
1.8 kristaps 849: return(0);
850: }
851:
852: /*
853: * Search for a key that already exists.
1.12 kristaps 854: * Create a new key if none is found.
1.8 kristaps 855: */
856:
1.12 kristaps 857: if (NULL == (def = eqn_def_find(ep, start, sz))) {
1.8 kristaps 858: /* Find holes in string array. */
859: for (i = 0; i < (int)ep->defsz; i++)
860: if (0 == ep->defs[i].keysz)
861: break;
862:
863: if (i == (int)ep->defsz) {
864: ep->defsz++;
865: ep->defs = mandoc_realloc
866: (ep->defs, ep->defsz *
867: sizeof(struct eqn_def));
1.9 kristaps 868: ep->defs[i].key = ep->defs[i].val = NULL;
1.8 kristaps 869: }
870:
871: ep->defs[i].keysz = sz;
872: ep->defs[i].key = mandoc_realloc
873: (ep->defs[i].key, sz + 1);
874:
875: memcpy(ep->defs[i].key, start, sz);
876: ep->defs[i].key[(int)sz] = '\0';
1.12 kristaps 877: def = &ep->defs[i];
1.8 kristaps 878: }
879:
1.14 kristaps 880: start = eqn_next(ep, ep->data[(int)ep->cur], &sz, 0);
1.8 kristaps 881:
1.12 kristaps 882: if (NULL == start) {
1.29 kristaps 883: EQN_MSG(MANDOCERR_EQNEOF, ep);
1.8 kristaps 884: return(0);
885: }
886:
1.12 kristaps 887: def->valsz = sz;
1.13 kristaps 888: def->val = mandoc_realloc(def->val, sz + 1);
1.12 kristaps 889: memcpy(def->val, start, sz);
890: def->val[(int)sz] = '\0';
1.30 kristaps 891: return(1);
892: }
893:
894: static int
895: eqn_do_gfont(struct eqn_node *ep)
896: {
897:
1.36 kristaps 898: if (NULL == eqn_nextrawtok(ep, NULL)) {
1.30 kristaps 899: EQN_MSG(MANDOCERR_EQNEOF, ep);
900: return(0);
901: }
1.12 kristaps 902: return(1);
1.8 kristaps 903: }
904:
905: static int
1.29 kristaps 906: eqn_do_gsize(struct eqn_node *ep)
907: {
908: const char *start;
909: size_t sz;
910:
911: if (NULL == (start = eqn_nextrawtok(ep, &sz))) {
912: EQN_MSG(MANDOCERR_EQNEOF, ep);
913: return(0);
914: }
915: ep->gsize = mandoc_strntoi(start, sz, 10);
916: return(1);
917: }
918:
919: static int
1.12 kristaps 920: eqn_do_undef(struct eqn_node *ep)
1.8 kristaps 921: {
922: const char *start;
1.12 kristaps 923: struct eqn_def *def;
1.8 kristaps 924: size_t sz;
925:
1.14 kristaps 926: if (NULL == (start = eqn_nextrawtok(ep, &sz))) {
1.29 kristaps 927: EQN_MSG(MANDOCERR_EQNEOF, ep);
1.12 kristaps 928: return(0);
929: } else if (NULL != (def = eqn_def_find(ep, start, sz)))
930: def->keysz = 0;
1.8 kristaps 931:
1.12 kristaps 932: return(1);
933: }
934:
935: static struct eqn_def *
936: eqn_def_find(struct eqn_node *ep, const char *key, size_t sz)
937: {
938: int i;
1.8 kristaps 939:
1.12 kristaps 940: for (i = 0; i < (int)ep->defsz; i++)
1.24 kristaps 941: if (ep->defs[i].keysz && STRNEQ(ep->defs[i].key,
942: ep->defs[i].keysz, key, sz))
1.12 kristaps 943: return(&ep->defs[i]);
1.8 kristaps 944:
1.12 kristaps 945: return(NULL);
1.1 kristaps 946: }
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