Annotation of mandoc/man_macro.c, Revision 1.59
1.59 ! kristaps 1: /* $Id: man_macro.c,v 1.58 2011/03/22 14:33:05 kristaps Exp $ */
1.1 kristaps 2: /*
1.50 schwarze 3: * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
1.1 kristaps 4: *
5: * Permission to use, copy, modify, and distribute this software for any
1.14 kristaps 6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
1.1 kristaps 8: *
1.14 kristaps 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.
1.1 kristaps 16: */
1.30 kristaps 17: #ifdef HAVE_CONFIG_H
18: #include "config.h"
19: #endif
20:
1.1 kristaps 21: #include <assert.h>
22: #include <ctype.h>
23: #include <stdlib.h>
24: #include <string.h>
25:
1.58 kristaps 26: #include "man.h"
1.46 kristaps 27: #include "mandoc.h"
1.57 kristaps 28: #include "libmandoc.h"
1.1 kristaps 29: #include "libman.h"
30:
1.34 kristaps 31: enum rew {
32: REW_REWIND,
33: REW_NOHALT,
1.40 kristaps 34: REW_HALT
1.34 kristaps 35: };
1.19 kristaps 36:
1.35 kristaps 37: static int blk_close(MACRO_PROT_ARGS);
38: static int blk_exp(MACRO_PROT_ARGS);
39: static int blk_imp(MACRO_PROT_ARGS);
1.19 kristaps 40: static int in_line_eoln(MACRO_PROT_ARGS);
41:
1.33 kristaps 42: static int rew_scope(enum man_type,
43: struct man *, enum mant);
1.34 kristaps 44: static enum rew rew_dohalt(enum mant, enum man_type,
1.19 kristaps 45: const struct man_node *);
1.34 kristaps 46: static enum rew rew_block(enum mant, enum man_type,
1.21 kristaps 47: const struct man_node *);
1.56 kristaps 48: static void rew_warn(struct man *,
1.46 kristaps 49: struct man_node *, enum mandocerr);
1.19 kristaps 50:
51: const struct man_macro __man_macros[MAN_MAX] = {
1.31 kristaps 52: { in_line_eoln, MAN_NSCOPED }, /* br */
1.19 kristaps 53: { in_line_eoln, 0 }, /* TH */
1.24 kristaps 54: { blk_imp, MAN_SCOPED }, /* SH */
55: { blk_imp, MAN_SCOPED }, /* SS */
1.27 kristaps 56: { blk_imp, MAN_SCOPED | MAN_FSCOPED }, /* TP */
1.19 kristaps 57: { blk_imp, 0 }, /* LP */
58: { blk_imp, 0 }, /* PP */
59: { blk_imp, 0 }, /* P */
60: { blk_imp, 0 }, /* IP */
61: { blk_imp, 0 }, /* HP */
62: { in_line_eoln, MAN_SCOPED }, /* SM */
63: { in_line_eoln, MAN_SCOPED }, /* SB */
64: { in_line_eoln, 0 }, /* BI */
65: { in_line_eoln, 0 }, /* IB */
66: { in_line_eoln, 0 }, /* BR */
67: { in_line_eoln, 0 }, /* RB */
68: { in_line_eoln, MAN_SCOPED }, /* R */
69: { in_line_eoln, MAN_SCOPED }, /* B */
70: { in_line_eoln, MAN_SCOPED }, /* I */
71: { in_line_eoln, 0 }, /* IR */
72: { in_line_eoln, 0 }, /* RI */
1.31 kristaps 73: { in_line_eoln, MAN_NSCOPED }, /* na */
74: { in_line_eoln, MAN_NSCOPED }, /* sp */
1.19 kristaps 75: { in_line_eoln, 0 }, /* nf */
76: { in_line_eoln, 0 }, /* fi */
1.21 kristaps 77: { blk_close, 0 }, /* RE */
1.35 kristaps 78: { blk_exp, MAN_EXPLICIT }, /* RS */
1.23 kristaps 79: { in_line_eoln, 0 }, /* DT */
1.28 kristaps 80: { in_line_eoln, 0 }, /* UC */
1.29 kristaps 81: { in_line_eoln, 0 }, /* PD */
1.45 joerg 82: { in_line_eoln, 0 }, /* AT */
1.49 kristaps 83: { in_line_eoln, 0 }, /* in */
1.53 kristaps 84: { in_line_eoln, 0 }, /* ft */
1.19 kristaps 85: };
1.9 kristaps 86:
1.19 kristaps 87: const struct man_macro * const man_macros = __man_macros;
1.1 kristaps 88:
89:
1.38 kristaps 90: /*
91: * Warn when "n" is an explicit non-roff macro.
92: */
1.56 kristaps 93: static void
1.46 kristaps 94: rew_warn(struct man *m, struct man_node *n, enum mandocerr er)
1.38 kristaps 95: {
96:
1.46 kristaps 97: if (er == MANDOCERR_MAX || MAN_BLOCK != n->type)
1.56 kristaps 98: return;
1.38 kristaps 99: if (MAN_VALID & n->flags)
1.56 kristaps 100: return;
1.38 kristaps 101: if ( ! (MAN_EXPLICIT & man_macros[n->tok].flags))
1.56 kristaps 102: return;
103:
104: assert(er < MANDOCERR_FATAL);
105: man_nmsg(m, n, er);
1.38 kristaps 106: }
107:
108:
109: /*
1.46 kristaps 110: * Rewind scope. If a code "er" != MANDOCERR_MAX has been provided, it
111: * will be used if an explicit block scope is being closed out.
1.38 kristaps 112: */
1.3 kristaps 113: int
1.55 kristaps 114: man_unscope(struct man *m, const struct man_node *to,
1.46 kristaps 115: enum mandocerr er)
1.1 kristaps 116: {
1.55 kristaps 117: struct man_node *n;
1.1 kristaps 118:
1.55 kristaps 119: assert(to);
1.19 kristaps 120:
121: /* LINTED */
1.55 kristaps 122: while (m->last != to) {
123: /*
124: * Save the parent here, because we may delete the
125: * m->last node in the post-validation phase and reset
126: * it to m->last->parent, causing a step in the closing
127: * out to be lost.
128: */
129: n = m->last->parent;
1.56 kristaps 130: rew_warn(m, m->last, er);
1.19 kristaps 131: if ( ! man_valid_post(m))
132: return(0);
1.55 kristaps 133: m->last = n;
1.19 kristaps 134: assert(m->last);
135: }
136:
1.56 kristaps 137: rew_warn(m, m->last, er);
1.19 kristaps 138: if ( ! man_valid_post(m))
1.1 kristaps 139: return(0);
1.35 kristaps 140:
141: m->next = MAN_ROOT == m->last->type ?
142: MAN_NEXT_CHILD : MAN_NEXT_SIBLING;
143:
144: return(1);
1.19 kristaps 145: }
1.1 kristaps 146:
147:
1.34 kristaps 148: static enum rew
1.33 kristaps 149: rew_block(enum mant ntok, enum man_type type, const struct man_node *n)
1.21 kristaps 150: {
151:
152: if (MAN_BLOCK == type && ntok == n->parent->tok &&
153: MAN_BODY == n->parent->type)
154: return(REW_REWIND);
155: return(ntok == n->tok ? REW_HALT : REW_NOHALT);
156: }
157:
158:
1.19 kristaps 159: /*
160: * There are three scope levels: scoped to the root (all), scoped to the
161: * section (all less sections), and scoped to subsections (all less
162: * sections and subsections).
163: */
1.34 kristaps 164: static enum rew
1.33 kristaps 165: rew_dohalt(enum mant tok, enum man_type type, const struct man_node *n)
1.19 kristaps 166: {
1.34 kristaps 167: enum rew c;
1.1 kristaps 168:
1.38 kristaps 169: /* We cannot progress beyond the root ever. */
1.19 kristaps 170: if (MAN_ROOT == n->type)
171: return(REW_HALT);
1.38 kristaps 172:
1.19 kristaps 173: assert(n->parent);
1.38 kristaps 174:
175: /* Normal nodes shouldn't go to the level of the root. */
1.19 kristaps 176: if (MAN_ROOT == n->parent->type)
177: return(REW_REWIND);
1.38 kristaps 178:
179: /* Already-validated nodes should be closed out. */
1.19 kristaps 180: if (MAN_VALID & n->flags)
181: return(REW_NOHALT);
182:
1.38 kristaps 183: /* First: rewind to ourselves. */
1.21 kristaps 184: if (type == n->type && tok == n->tok)
185: return(REW_REWIND);
186:
1.38 kristaps 187: /*
188: * Next follow the implicit scope-smashings as defined by man.7:
189: * section, sub-section, etc.
190: */
191:
1.19 kristaps 192: switch (tok) {
193: case (MAN_SH):
194: break;
195: case (MAN_SS):
1.20 kristaps 196: /* Rewind to a section, if a block. */
1.21 kristaps 197: if (REW_NOHALT != (c = rew_block(MAN_SH, type, n)))
198: return(c);
199: break;
200: case (MAN_RS):
201: /* Rewind to a subsection, if a block. */
202: if (REW_NOHALT != (c = rew_block(MAN_SS, type, n)))
203: return(c);
204: /* Rewind to a section, if a block. */
205: if (REW_NOHALT != (c = rew_block(MAN_SH, type, n)))
206: return(c);
1.19 kristaps 207: break;
208: default:
1.21 kristaps 209: /* Rewind to an offsetter, if a block. */
210: if (REW_NOHALT != (c = rew_block(MAN_RS, type, n)))
211: return(c);
1.20 kristaps 212: /* Rewind to a subsection, if a block. */
1.21 kristaps 213: if (REW_NOHALT != (c = rew_block(MAN_SS, type, n)))
214: return(c);
1.20 kristaps 215: /* Rewind to a section, if a block. */
1.21 kristaps 216: if (REW_NOHALT != (c = rew_block(MAN_SH, type, n)))
217: return(c);
1.19 kristaps 218: break;
1.3 kristaps 219: }
1.1 kristaps 220:
1.19 kristaps 221: return(REW_NOHALT);
222: }
1.9 kristaps 223:
224:
1.19 kristaps 225: /*
226: * Rewinding entails ascending the parse tree until a coherent point,
227: * for example, the `SH' macro will close out any intervening `SS'
228: * scopes. When a scope is closed, it must be validated and actioned.
229: */
230: static int
1.33 kristaps 231: rew_scope(enum man_type type, struct man *m, enum mant tok)
1.19 kristaps 232: {
233: struct man_node *n;
1.34 kristaps 234: enum rew c;
1.7 kristaps 235:
1.19 kristaps 236: /* LINTED */
237: for (n = m->last; n; n = n->parent) {
238: /*
239: * Whether we should stop immediately (REW_HALT), stop
240: * and rewind until this point (REW_REWIND), or keep
241: * rewinding (REW_NOHALT).
242: */
243: c = rew_dohalt(tok, type, n);
244: if (REW_HALT == c)
245: return(1);
246: if (REW_REWIND == c)
1.7 kristaps 247: break;
1.6 kristaps 248: }
1.1 kristaps 249:
1.38 kristaps 250: /*
251: * Rewind until the current point. Warn if we're a roff
252: * instruction that's mowing over explicit scopes.
253: */
254: assert(n);
1.19 kristaps 255:
1.46 kristaps 256: return(man_unscope(m, n, MANDOCERR_MAX));
1.19 kristaps 257: }
258:
1.6 kristaps 259:
1.36 kristaps 260: /*
261: * Close out a generic explicit macro.
262: */
1.37 kristaps 263: /* ARGSUSED */
1.35 kristaps 264: int
1.21 kristaps 265: blk_close(MACRO_PROT_ARGS)
266: {
1.33 kristaps 267: enum mant ntok;
1.21 kristaps 268: const struct man_node *nn;
269:
270: switch (tok) {
271: case (MAN_RE):
272: ntok = MAN_RS;
273: break;
274: default:
275: abort();
276: /* NOTREACHED */
277: }
278:
279: for (nn = m->last->parent; nn; nn = nn->parent)
280: if (ntok == nn->tok)
281: break;
282:
283: if (NULL == nn)
1.56 kristaps 284: man_pmsg(m, line, ppos, MANDOCERR_NOSCOPE);
1.21 kristaps 285:
286: if ( ! rew_scope(MAN_BODY, m, ntok))
287: return(0);
288: if ( ! rew_scope(MAN_BLOCK, m, ntok))
289: return(0);
1.35 kristaps 290:
1.21 kristaps 291: return(1);
292: }
293:
294:
1.48 kristaps 295: /* ARGSUSED */
1.35 kristaps 296: int
297: blk_exp(MACRO_PROT_ARGS)
298: {
1.59 ! kristaps 299: int la;
1.35 kristaps 300: char *p;
301:
302: /*
303: * Close out prior scopes. "Regular" explicit macros cannot be
304: * nested, but we allow roff macros to be placed just about
305: * anywhere.
306: */
307:
1.44 kristaps 308: if ( ! rew_scope(MAN_BODY, m, tok))
309: return(0);
310: if ( ! rew_scope(MAN_BLOCK, m, tok))
311: return(0);
1.35 kristaps 312:
313: if ( ! man_block_alloc(m, line, ppos, tok))
314: return(0);
315: if ( ! man_head_alloc(m, line, ppos, tok))
316: return(0);
317:
318: for (;;) {
319: la = *pos;
1.59 ! kristaps 320: if (ARGS_EOLN == man_args(m, line, pos, buf, &p))
1.35 kristaps 321: break;
322: if ( ! man_word_alloc(m, line, la, p))
323: return(0);
324: }
325:
326: assert(m);
327: assert(tok != MAN_MAX);
328:
329: if ( ! rew_scope(MAN_HEAD, m, tok))
330: return(0);
331: return(man_body_alloc(m, line, ppos, tok));
332: }
333:
334:
335:
1.19 kristaps 336: /*
337: * Parse an implicit-block macro. These contain a MAN_HEAD and a
338: * MAN_BODY contained within a MAN_BLOCK. Rules for closing out other
339: * scopes, such as `SH' closing out an `SS', are defined in the rew
340: * routines.
341: */
1.48 kristaps 342: /* ARGSUSED */
1.19 kristaps 343: int
344: blk_imp(MACRO_PROT_ARGS)
345: {
1.59 ! kristaps 346: int la;
1.19 kristaps 347: char *p;
1.25 kristaps 348: struct man_node *n;
1.19 kristaps 349:
350: /* Close out prior scopes. */
1.7 kristaps 351:
1.19 kristaps 352: if ( ! rew_scope(MAN_BODY, m, tok))
1.5 kristaps 353: return(0);
1.19 kristaps 354: if ( ! rew_scope(MAN_BLOCK, m, tok))
1.6 kristaps 355: return(0);
1.1 kristaps 356:
1.19 kristaps 357: /* Allocate new block & head scope. */
358:
359: if ( ! man_block_alloc(m, line, ppos, tok))
360: return(0);
361: if ( ! man_head_alloc(m, line, ppos, tok))
362: return(0);
1.1 kristaps 363:
1.25 kristaps 364: n = m->last;
365:
1.19 kristaps 366: /* Add line arguments. */
1.3 kristaps 367:
1.19 kristaps 368: for (;;) {
369: la = *pos;
1.59 ! kristaps 370: if (ARGS_EOLN == man_args(m, line, pos, buf, &p))
1.19 kristaps 371: break;
372: if ( ! man_word_alloc(m, line, la, p))
1.6 kristaps 373: return(0);
374: }
375:
1.19 kristaps 376: /* Close out head and open body (unless MAN_SCOPE). */
377:
1.27 kristaps 378: if (MAN_SCOPED & man_macros[tok].flags) {
379: /* If we're forcing scope (`TP'), keep it open. */
380: if (MAN_FSCOPED & man_macros[tok].flags) {
381: m->flags |= MAN_BLINE;
382: return(1);
383: } else if (n == m->last) {
384: m->flags |= MAN_BLINE;
385: return(1);
386: }
387: }
388:
389: if ( ! rew_scope(MAN_HEAD, m, tok))
1.6 kristaps 390: return(0);
1.19 kristaps 391: return(man_body_alloc(m, line, ppos, tok));
1.4 kristaps 392: }
393:
394:
1.48 kristaps 395: /* ARGSUSED */
1.19 kristaps 396: int
397: in_line_eoln(MACRO_PROT_ARGS)
1.3 kristaps 398: {
1.59 ! kristaps 399: int la;
1.19 kristaps 400: char *p;
401: struct man_node *n;
1.3 kristaps 402:
1.19 kristaps 403: if ( ! man_elem_alloc(m, line, ppos, tok))
1.3 kristaps 404: return(0);
405:
1.19 kristaps 406: n = m->last;
1.3 kristaps 407:
1.19 kristaps 408: for (;;) {
409: la = *pos;
1.59 ! kristaps 410: if (ARGS_EOLN == man_args(m, line, pos, buf, &p))
1.19 kristaps 411: break;
412: if ( ! man_word_alloc(m, line, la, p))
413: return(0);
414: }
1.3 kristaps 415:
1.31 kristaps 416: /*
417: * If no arguments are specified and this is MAN_SCOPED (i.e.,
418: * next-line scoped), then set our mode to indicate that we're
419: * waiting for terms to load into our context.
420: */
421:
1.25 kristaps 422: if (n == m->last && MAN_SCOPED & man_macros[tok].flags) {
1.31 kristaps 423: assert( ! (MAN_NSCOPED & man_macros[tok].flags));
1.19 kristaps 424: m->flags |= MAN_ELINE;
425: return(1);
426: }
1.3 kristaps 427:
1.31 kristaps 428: /* Set ignorable context, if applicable. */
429:
430: if (MAN_NSCOPED & man_macros[tok].flags) {
431: assert( ! (MAN_SCOPED & man_macros[tok].flags));
432: m->flags |= MAN_ILINE;
433: }
434:
1.19 kristaps 435: /*
1.31 kristaps 436: * Rewind our element scope. Note that when TH is pruned, we'll
437: * be back at the root, so make sure that we don't clobber as
438: * its sibling.
1.19 kristaps 439: */
1.3 kristaps 440:
1.19 kristaps 441: for ( ; m->last; m->last = m->last->parent) {
442: if (m->last == n)
443: break;
444: if (m->last->type == MAN_ROOT)
445: break;
446: if ( ! man_valid_post(m))
447: return(0);
448: }
1.3 kristaps 449:
1.19 kristaps 450: assert(m->last);
1.3 kristaps 451:
452: /*
1.19 kristaps 453: * Same here regarding whether we're back at the root.
1.3 kristaps 454: */
455:
1.19 kristaps 456: if (m->last->type != MAN_ROOT && ! man_valid_post(m))
457: return(0);
1.35 kristaps 458:
459: m->next = MAN_ROOT == m->last->type ?
460: MAN_NEXT_CHILD : MAN_NEXT_SIBLING;
1.3 kristaps 461:
1.19 kristaps 462: return(1);
463: }
1.3 kristaps 464:
465:
1.19 kristaps 466: int
467: man_macroend(struct man *m)
468: {
1.22 kristaps 469:
1.46 kristaps 470: return(man_unscope(m, m->first, MANDOCERR_SCOPEEXIT));
1.19 kristaps 471: }
1.3 kristaps 472:
CVSweb