summaryrefslogtreecommitdiffstats
path: root/man_macro.c
blob: b040823a0352d9a43600f5a0107f28fb9099cd22 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
/* $Id$ */
/*
 * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 * Copyright (c) 2012-2015, 2017-2020 Ingo Schwarze <schwarze@openbsd.org>
 * Copyright (c) 2013 Franco Fichtner <franco@lastsummer.de>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#include "config.h"

#include <sys/types.h>

#include <assert.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "mandoc.h"
#include "roff.h"
#include "man.h"
#include "libmandoc.h"
#include "roff_int.h"
#include "libman.h"

static	void		 blk_close(MACRO_PROT_ARGS);
static	void		 blk_exp(MACRO_PROT_ARGS);
static	void		 blk_imp(MACRO_PROT_ARGS);
static	void		 in_line_eoln(MACRO_PROT_ARGS);
static	int		 man_args(struct roff_man *, int,
				int *, char *, char **);
static	void		 rew_scope(struct roff_man *, enum roff_tok);

static const struct man_macro man_macros[MAN_MAX - MAN_TH] = {
	{ in_line_eoln, MAN_XSCOPE }, /* TH */
	{ blk_imp, MAN_XSCOPE | MAN_BSCOPED }, /* SH */
	{ blk_imp, MAN_XSCOPE | MAN_BSCOPED }, /* SS */
	{ blk_imp, MAN_XSCOPE | MAN_BSCOPED }, /* TP */
	{ blk_imp, MAN_XSCOPE | MAN_BSCOPED }, /* TQ */
	{ blk_imp, MAN_XSCOPE }, /* LP */
	{ blk_imp, MAN_XSCOPE }, /* PP */
	{ blk_imp, MAN_XSCOPE }, /* P */
	{ blk_imp, MAN_XSCOPE }, /* IP */
	{ blk_imp, MAN_XSCOPE }, /* HP */
	{ in_line_eoln, MAN_NSCOPED | MAN_ESCOPED | MAN_JOIN }, /* SM */
	{ in_line_eoln, MAN_NSCOPED | MAN_ESCOPED | MAN_JOIN }, /* SB */
	{ in_line_eoln, 0 }, /* BI */
	{ in_line_eoln, 0 }, /* IB */
	{ in_line_eoln, 0 }, /* BR */
	{ in_line_eoln, 0 }, /* RB */
	{ in_line_eoln, MAN_NSCOPED | MAN_ESCOPED | MAN_JOIN }, /* R */
	{ in_line_eoln, MAN_NSCOPED | MAN_ESCOPED | MAN_JOIN }, /* B */
	{ in_line_eoln, MAN_NSCOPED | MAN_ESCOPED | MAN_JOIN }, /* I */
	{ in_line_eoln, 0 }, /* IR */
	{ in_line_eoln, 0 }, /* RI */
	{ blk_close, MAN_XSCOPE }, /* RE */
	{ blk_exp, MAN_XSCOPE }, /* RS */
	{ in_line_eoln, 0 }, /* DT */
	{ in_line_eoln, 0 }, /* UC */
	{ in_line_eoln, MAN_NSCOPED }, /* PD */
	{ in_line_eoln, 0 }, /* AT */
	{ in_line_eoln, MAN_NSCOPED }, /* in */
	{ blk_imp, MAN_XSCOPE }, /* SY */
	{ blk_close, MAN_XSCOPE }, /* YS */
	{ in_line_eoln, 0 }, /* OP */
	{ in_line_eoln, MAN_XSCOPE }, /* EX */
	{ in_line_eoln, MAN_XSCOPE }, /* EE */
	{ blk_exp, MAN_XSCOPE }, /* UR */
	{ blk_close, MAN_XSCOPE }, /* UE */
	{ blk_exp, MAN_XSCOPE }, /* MT */
	{ blk_close, MAN_XSCOPE }, /* ME */
};


const struct man_macro *
man_macro(enum roff_tok tok)
{
	assert(tok >= MAN_TH && tok <= MAN_MAX);
	return man_macros + (tok - MAN_TH);
}

void
man_unscope(struct roff_man *man, const struct roff_node *to)
{
	struct roff_node *n;

	to = to->parent;
	n = man->last;
	while (n != to) {

		/* Reached the end of the document? */

		if (to == NULL && ! (n->flags & NODE_VALID)) {
			if (man->flags & (MAN_BLINE | MAN_ELINE) &&
			    man_macro(n->tok)->flags &
			     (MAN_BSCOPED | MAN_NSCOPED)) {
				mandoc_msg(MANDOCERR_BLK_LINE,
				    n->line, n->pos,
				    "EOF breaks %s", roff_name[n->tok]);
				if (man->flags & MAN_ELINE) {
					if ((man_macro(n->parent->tok)->flags &
					    MAN_ESCOPED) == 0)
						man->flags &= ~MAN_ELINE;
				} else {
					assert(n->type == ROFFT_HEAD);
					n = n->parent;
					man->flags &= ~MAN_BLINE;
				}
				man->last = n;
				n = n->parent;
				roff_node_delete(man, man->last);
				continue;
			}
			if (n->type == ROFFT_BLOCK &&
			    man_macro(n->tok)->fp == blk_exp)
				mandoc_msg(MANDOCERR_BLK_NOEND,
				    n->line, n->pos, "%s",
				    roff_name[n->tok]);
		}

		/*
		 * We might delete the man->last node
		 * in the post-validation phase.
		 * Save a pointer to the parent such that
		 * we know where to continue the iteration.
		 */

		man->last = n;
		n = n->parent;
		man->last->flags |= NODE_VALID;
	}

	/*
	 * If we ended up at the parent of the node we were
	 * supposed to rewind to, that means the target node
	 * got deleted, so add the next node we parse as a child
	 * of the parent instead of as a sibling of the target.
	 */

	man->next = (man->last == to) ?
	    ROFF_NEXT_CHILD : ROFF_NEXT_SIBLING;
}

/*
 * Rewinding entails ascending the parse tree until a coherent point,
 * for example, the `SH' macro will close out any intervening `SS'
 * scopes.  When a scope is closed, it must be validated and actioned.
 */
static void
rew_scope(struct roff_man *man, enum roff_tok tok)
{
	struct roff_node *n;

	/* Preserve empty paragraphs before RS. */

	n = man->last;
	if (tok == MAN_RS && n->child == NULL &&
	    (n->tok == MAN_P || n->tok == MAN_PP || n->tok == MAN_LP))
		return;

	for (;;) {
		if (n->type == ROFFT_ROOT)
			return;
		if (n->flags & NODE_VALID) {
			n = n->parent;
			continue;
		}
		if (n->type != ROFFT_BLOCK) {
			if (n->parent->type == ROFFT_ROOT) {
				man_unscope(man, n);
				return;
			} else {
				n = n->parent;
				continue;
			}
		}
		if (tok != MAN_SH && (n->tok == MAN_SH ||
		    (tok != MAN_SS && (n->tok == MAN_SS ||
		     man_macro(n->tok)->fp == blk_exp))))
			return;
		man_unscope(man, n);
		n = man->last;
	}
}


/*
 * Close out a generic explicit macro.
 */
void
blk_close(MACRO_PROT_ARGS)
{
	enum roff_tok		 ctok, ntok;
	const struct roff_node	*nn;
	char			*p, *ep;
	int			 cline, cpos, la, nrew, target;

	nrew = 1;
	switch (tok) {
	case MAN_RE:
		ntok = MAN_RS;
		la = *pos;
		if ( ! man_args(man, line, pos, buf, &p))
			break;
		for (nn = man->last->parent; nn; nn = nn->parent)
			if (nn->tok == ntok && nn->type == ROFFT_BLOCK)
				nrew++;
		target = strtol(p, &ep, 10);
		if (*ep != '\0')
			mandoc_msg(MANDOCERR_ARG_EXCESS, line,
			    la + (buf[la] == '"') + (int)(ep - p),
			    "RE ... %s", ep);
		free(p);
		if (target == 0)
			target = 1;
		nrew -= target;
		if (nrew < 1) {
			mandoc_msg(MANDOCERR_RE_NOTOPEN,
			    line, ppos, "RE %d", target);
			return;
		}
		break;
	case MAN_YS:
		ntok = MAN_SY;
		break;
	case MAN_UE:
		ntok = MAN_UR;
		break;
	case MAN_ME:
		ntok = MAN_MT;
		break;
	default:
		abort();
	}

	for (nn = man->last->parent; nn; nn = nn->parent)
		if (nn->tok == ntok && nn->type == ROFFT_BLOCK && ! --nrew)
			break;

	if (nn == NULL) {
		mandoc_msg(MANDOCERR_BLK_NOTOPEN,
		    line, ppos, "%s", roff_name[tok]);
		rew_scope(man, MAN_PP);
		if (tok == MAN_RE) {
			roff_elem_alloc(man, line, ppos, ROFF_br);
			man->last->flags |= NODE_LINE |
			    NODE_VALID | NODE_ENDED;
			man->next = ROFF_NEXT_SIBLING;
		}
		return;
	}

	cline = man->last->line;
	cpos = man->last->pos;
	ctok = man->last->tok;
	man_unscope(man, nn);

	if (tok == MAN_RE && nn->head->aux > 0)
		roff_setreg(man->roff, "an-margin", nn->head->aux, '-');

	/* Trailing text. */

	if (buf[*pos] != '\0') {
		roff_word_alloc(man, line, ppos, buf + *pos);
		man->last->flags |= NODE_DELIMC;
		if (mandoc_eos(man->last->string, strlen(man->last->string)))
			man->last->flags |= NODE_EOS;
	}

	/* Move a trailing paragraph behind the block. */

	if (ctok == MAN_LP || ctok == MAN_PP || ctok == MAN_P) {
		*pos = strlen(buf);
		blk_imp(man, ctok, cline, cpos, pos, buf);
	}

	/* Synopsis blocks need an explicit end marker for spacing. */

	if (tok == MAN_YS && man->last == nn) {
		roff_elem_alloc(man, line, ppos, tok);
		man_unscope(man, man->last);
	}
}

void
blk_exp(MACRO_PROT_ARGS)
{
	struct roff_node *head;
	char		*p;
	int		 la;

	if (tok == MAN_RS) {
		rew_scope(man, tok);
		man->flags |= ROFF_NONOFILL;
	}
	roff_block_alloc(man, line, ppos, tok);
	head = roff_head_alloc(man, line, ppos, tok);

	la = *pos;
	if (man_args(man, line, pos, buf, &p)) {
		roff_word_alloc(man, line, la, p);
		if (tok == MAN_RS) {
			if (roff_getreg(man->roff, "an-margin") == 0)
				roff_setreg(man->roff, "an-margin",
				    7 * 24, '=');
			if ((head->aux = strtod(p, NULL) * 24.0) > 0)
				roff_setreg(man->roff, "an-margin",
				    head->aux, '+');
		}
		free(p);
	}

	if (buf[*pos] != '\0')
		mandoc_msg(MANDOCERR_ARG_EXCESS, line, *pos,
		    "%s ... %s", roff_name[tok], buf + *pos);

	man_unscope(man, head);
	roff_body_alloc(man, line, ppos, tok);
	man->flags &= ~ROFF_NONOFILL;
}

/*
 * Parse an implicit-block macro.  These contain a ROFFT_HEAD and a
 * ROFFT_BODY contained within a ROFFT_BLOCK.  Rules for closing out other
 * scopes, such as `SH' closing out an `SS', are defined in the rew
 * routines.
 */
void
blk_imp(MACRO_PROT_ARGS)
{
	int		 la;
	char		*p;
	struct roff_node *n;

	rew_scope(man, tok);
	man->flags |= ROFF_NONOFILL;
	if (tok == MAN_SH || tok == MAN_SS)
		man->flags &= ~ROFF_NOFILL;
	roff_block_alloc(man, line, ppos, tok);
	n = roff_head_alloc(man, line, ppos, tok);

	/* Add line arguments. */

	for (;;) {
		la = *pos;
		if ( ! man_args(man, line, pos, buf, &p))
			break;
		roff_word_alloc(man, line, la, p);
		free(p);
	}

	/*
	 * For macros having optional next-line scope,
	 * keep the head open if there were no arguments.
	 * For `TP' and `TQ', always keep the head open.
	 */

	if (man_macro(tok)->flags & MAN_BSCOPED &&
	    (tok == MAN_TP || tok == MAN_TQ || n == man->last)) {
		man->flags |= MAN_BLINE;
		return;
	}

	/* Close out the head and open the body. */

	man_unscope(man, n);
	roff_body_alloc(man, line, ppos, tok);
	man->flags &= ~ROFF_NONOFILL;
}

void
in_line_eoln(MACRO_PROT_ARGS)
{
	int		 la;
	char		*p;
	struct roff_node *n;

	roff_elem_alloc(man, line, ppos, tok);
	n = man->last;

	if (tok == MAN_EX)
		man->flags |= ROFF_NOFILL;
	else if (tok == MAN_EE)
		man->flags &= ~ROFF_NOFILL;

	for (;;) {
		if (buf[*pos] != '\0' && man->last != n && tok == MAN_PD) {
			mandoc_msg(MANDOCERR_ARG_EXCESS, line, *pos,
			    "%s ... %s", roff_name[tok], buf + *pos);
			break;
		}
		la = *pos;
		if ( ! man_args(man, line, pos, buf, &p))
			break;
		if (man_macro(tok)->flags & MAN_JOIN &&
		    man->last->type == ROFFT_TEXT)
			roff_word_append(man, p);
		else
			roff_word_alloc(man, line, la, p);
		free(p);
	}

	/*
	 * Append NODE_EOS in case the last snipped argument
	 * ends with a dot, e.g. `.IR syslog (3).'
	 */

	if (n != man->last &&
	    mandoc_eos(man->last->string, strlen(man->last->string)))
		man->last->flags |= NODE_EOS;

	/*
	 * If no arguments are specified and this is MAN_ESCOPED (i.e.,
	 * next-line scoped), then set our mode to indicate that we're
	 * waiting for terms to load into our context.
	 */

	if (n == man->last && man_macro(tok)->flags & MAN_ESCOPED) {
		man->flags |= MAN_ELINE;
		return;
	}

	assert(man->last->type != ROFFT_ROOT);
	man->next = ROFF_NEXT_SIBLING;

	/* Rewind our element scope. */

	for ( ; man->last; man->last = man->last->parent) {
		man->last->flags |= NODE_VALID;
		if (man->last == n)
			break;
	}

	/* Rewind next-line scoped ancestors, if any. */

	if (man_macro(tok)->flags & MAN_ESCOPED)
		man_descope(man, line, ppos, NULL);
}

void
man_endparse(struct roff_man *man)
{
	man_unscope(man, man->meta.first);
}

static int
man_args(struct roff_man *man, int line, int *pos, char *buf, char **v)
{
	char	 *start;

	assert(*pos);
	*v = start = buf + *pos;
	assert(' ' != *start);

	if ('\0' == *start)
		return 0;

	*v = roff_getarg(man->roff, v, line, pos);
	return 1;
}