1 /* $Id: man_macro.c,v 1.78 2013/12/22 13:25:17 schwarze Exp $ */
3 * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2012, 2013 Ingo Schwarze <schwarze@openbsd.org>
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.
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.
29 #include "libmandoc.h"
38 static int blk_close(MACRO_PROT_ARGS);
39 static int blk_exp(MACRO_PROT_ARGS);
40 static int blk_imp(MACRO_PROT_ARGS);
41 static int in_line_eoln(MACRO_PROT_ARGS);
42 static int man_args(struct man *, int,
43 int *, char *, char **);
45 static int rew_scope(enum man_type,
46 struct man *, enum mant);
47 static enum rew rew_dohalt(enum mant, enum man_type,
48 const struct man_node *);
49 static enum rew rew_block(enum mant, enum man_type,
50 const struct man_node *);
51 static void rew_warn(struct man *,
52 struct man_node *, enum mandocerr);
54 const struct man_macro __man_macros[MAN_MAX] = {
55 { in_line_eoln, MAN_NSCOPED }, /* br */
56 { in_line_eoln, MAN_BSCOPE }, /* TH */
57 { blk_imp, MAN_BSCOPE | MAN_SCOPED }, /* SH */
58 { blk_imp, MAN_BSCOPE | MAN_SCOPED }, /* SS */
59 { blk_imp, MAN_BSCOPE | MAN_SCOPED | MAN_FSCOPED }, /* TP */
60 { blk_imp, MAN_BSCOPE }, /* LP */
61 { blk_imp, MAN_BSCOPE }, /* PP */
62 { blk_imp, MAN_BSCOPE }, /* P */
63 { blk_imp, MAN_BSCOPE }, /* IP */
64 { blk_imp, MAN_BSCOPE }, /* HP */
65 { in_line_eoln, MAN_SCOPED }, /* SM */
66 { in_line_eoln, MAN_SCOPED }, /* SB */
67 { in_line_eoln, 0 }, /* BI */
68 { in_line_eoln, 0 }, /* IB */
69 { in_line_eoln, 0 }, /* BR */
70 { in_line_eoln, 0 }, /* RB */
71 { in_line_eoln, MAN_SCOPED }, /* R */
72 { in_line_eoln, MAN_SCOPED }, /* B */
73 { in_line_eoln, MAN_SCOPED }, /* I */
74 { in_line_eoln, 0 }, /* IR */
75 { in_line_eoln, 0 }, /* RI */
76 { in_line_eoln, MAN_NSCOPED }, /* na */
77 { in_line_eoln, MAN_NSCOPED }, /* sp */
78 { in_line_eoln, MAN_BSCOPE }, /* nf */
79 { in_line_eoln, MAN_BSCOPE }, /* fi */
80 { blk_close, 0 }, /* RE */
81 { blk_exp, MAN_BSCOPE | MAN_EXPLICIT }, /* RS */
82 { in_line_eoln, 0 }, /* DT */
83 { in_line_eoln, 0 }, /* UC */
84 { in_line_eoln, 0 }, /* PD */
85 { in_line_eoln, 0 }, /* AT */
86 { in_line_eoln, 0 }, /* in */
87 { in_line_eoln, 0 }, /* ft */
88 { in_line_eoln, 0 }, /* OP */
89 { in_line_eoln, MAN_BSCOPE }, /* EX */
90 { in_line_eoln, MAN_BSCOPE }, /* EE */
91 { blk_exp, MAN_BSCOPE | MAN_EXPLICIT }, /* UR */
92 { blk_close, 0 }, /* UE */
95 const struct man_macro * const man_macros = __man_macros;
99 * Warn when "n" is an explicit non-roff macro.
102 rew_warn(struct man *man, struct man_node *n, enum mandocerr er)
105 if (er == MANDOCERR_MAX || MAN_BLOCK != n->type)
107 if (MAN_VALID & n->flags)
109 if ( ! (MAN_EXPLICIT & man_macros[n->tok].flags))
112 assert(er < MANDOCERR_FATAL);
113 man_nmsg(man, n, er);
118 * Rewind scope. If a code "er" != MANDOCERR_MAX has been provided, it
119 * will be used if an explicit block scope is being closed out.
122 man_unscope(struct man *man, const struct man_node *to,
129 man->next = MAN_NEXT_SIBLING;
132 while (man->last != to) {
134 * Save the parent here, because we may delete the
135 * man->last node in the post-validation phase and reset
136 * it to man->last->parent, causing a step in the closing
139 n = man->last->parent;
140 rew_warn(man, man->last, er);
141 if ( ! man_valid_post(man))
147 rew_warn(man, man->last, er);
148 if ( ! man_valid_post(man))
156 rew_block(enum mant ntok, enum man_type type, const struct man_node *n)
159 if (MAN_BLOCK == type && ntok == n->parent->tok &&
160 MAN_BODY == n->parent->type)
162 return(ntok == n->tok ? REW_HALT : REW_NOHALT);
167 * There are three scope levels: scoped to the root (all), scoped to the
168 * section (all less sections), and scoped to subsections (all less
169 * sections and subsections).
172 rew_dohalt(enum mant tok, enum man_type type, const struct man_node *n)
176 /* We cannot progress beyond the root ever. */
177 if (MAN_ROOT == n->type)
182 /* Normal nodes shouldn't go to the level of the root. */
183 if (MAN_ROOT == n->parent->type)
186 /* Already-validated nodes should be closed out. */
187 if (MAN_VALID & n->flags)
190 /* First: rewind to ourselves. */
191 if (type == n->type && tok == n->tok) {
192 if (MAN_EXPLICIT & man_macros[n->tok].flags)
199 * Next follow the implicit scope-smashings as defined by man.7:
200 * section, sub-section, etc.
207 /* Rewind to a section, if a block. */
208 if (REW_NOHALT != (c = rew_block(MAN_SH, type, n)))
212 /* Preserve empty paragraphs before RS. */
213 if (0 == n->nchild && (MAN_P == n->tok ||
214 MAN_PP == n->tok || MAN_LP == n->tok))
216 /* Rewind to a subsection, if a block. */
217 if (REW_NOHALT != (c = rew_block(MAN_SS, type, n)))
219 /* Rewind to a section, if a block. */
220 if (REW_NOHALT != (c = rew_block(MAN_SH, type, n)))
224 /* Rewind to an offsetter, if a block. */
225 if (REW_NOHALT != (c = rew_block(MAN_RS, type, n)))
227 /* Rewind to a subsection, if a block. */
228 if (REW_NOHALT != (c = rew_block(MAN_SS, type, n)))
230 /* Rewind to a section, if a block. */
231 if (REW_NOHALT != (c = rew_block(MAN_SH, type, n)))
241 * Rewinding entails ascending the parse tree until a coherent point,
242 * for example, the `SH' macro will close out any intervening `SS'
243 * scopes. When a scope is closed, it must be validated and actioned.
246 rew_scope(enum man_type type, struct man *man, enum mant tok)
252 for (n = man->last; n; n = n->parent) {
254 * Whether we should stop immediately (REW_HALT), stop
255 * and rewind until this point (REW_REWIND), or keep
256 * rewinding (REW_NOHALT).
258 c = rew_dohalt(tok, type, n);
266 * Rewind until the current point. Warn if we're a roff
267 * instruction that's mowing over explicit scopes.
271 return(man_unscope(man, n, MANDOCERR_MAX));
276 * Close out a generic explicit macro.
280 blk_close(MACRO_PROT_ARGS)
283 const struct man_node *nn;
297 for (nn = man->last->parent; nn; nn = nn->parent)
298 if (ntok == nn->tok && MAN_BLOCK == nn->type)
302 man_pmsg(man, line, ppos, MANDOCERR_NOSCOPE);
303 if ( ! rew_scope(MAN_BLOCK, man, MAN_PP))
306 man_unscope(man, nn, MANDOCERR_MAX);
314 blk_exp(MACRO_PROT_ARGS)
320 /* Close out prior implicit scopes. */
322 if ( ! rew_scope(MAN_BLOCK, man, tok))
325 if ( ! man_block_alloc(man, line, ppos, tok))
327 if ( ! man_head_alloc(man, line, ppos, tok))
332 if ( ! man_args(man, line, pos, buf, &p))
334 if ( ! man_word_alloc(man, line, la, p))
339 assert(tok != MAN_MAX);
341 for (n = man->last; n; n = n->parent) {
344 assert(MAN_HEAD == n->type);
345 man_unscope(man, n, MANDOCERR_MAX);
349 return(man_body_alloc(man, line, ppos, tok));
355 * Parse an implicit-block macro. These contain a MAN_HEAD and a
356 * MAN_BODY contained within a MAN_BLOCK. Rules for closing out other
357 * scopes, such as `SH' closing out an `SS', are defined in the rew
362 blk_imp(MACRO_PROT_ARGS)
368 /* Close out prior scopes. */
370 if ( ! rew_scope(MAN_BODY, man, tok))
372 if ( ! rew_scope(MAN_BLOCK, man, tok))
375 /* Allocate new block & head scope. */
377 if ( ! man_block_alloc(man, line, ppos, tok))
379 if ( ! man_head_alloc(man, line, ppos, tok))
384 /* Add line arguments. */
388 if ( ! man_args(man, line, pos, buf, &p))
390 if ( ! man_word_alloc(man, line, la, p))
394 /* Close out head and open body (unless MAN_SCOPE). */
396 if (MAN_SCOPED & man_macros[tok].flags) {
397 /* If we're forcing scope (`TP'), keep it open. */
398 if (MAN_FSCOPED & man_macros[tok].flags) {
399 man->flags |= MAN_BLINE;
401 } else if (n == man->last) {
402 man->flags |= MAN_BLINE;
407 if ( ! rew_scope(MAN_HEAD, man, tok))
409 return(man_body_alloc(man, line, ppos, tok));
415 in_line_eoln(MACRO_PROT_ARGS)
421 if ( ! man_elem_alloc(man, line, ppos, tok))
428 if ( ! man_args(man, line, pos, buf, &p))
430 if ( ! man_word_alloc(man, line, la, p))
435 * Append MAN_EOS in case the last snipped argument
436 * ends with a dot, e.g. `.IR syslog (3).'
439 if (n != man->last &&
440 mandoc_eos(man->last->string, strlen(man->last->string), 0))
441 man->last->flags |= MAN_EOS;
444 * If no arguments are specified and this is MAN_SCOPED (i.e.,
445 * next-line scoped), then set our mode to indicate that we're
446 * waiting for terms to load into our context.
449 if (n == man->last && MAN_SCOPED & man_macros[tok].flags) {
450 assert( ! (MAN_NSCOPED & man_macros[tok].flags));
451 man->flags |= MAN_ELINE;
455 /* Set ignorable context, if applicable. */
457 if (MAN_NSCOPED & man_macros[tok].flags) {
458 assert( ! (MAN_SCOPED & man_macros[tok].flags));
459 man->flags |= MAN_ILINE;
462 assert(MAN_ROOT != man->last->type);
463 man->next = MAN_NEXT_SIBLING;
466 * Rewind our element scope. Note that when TH is pruned, we'll
467 * be back at the root, so make sure that we don't clobber as
471 for ( ; man->last; man->last = man->last->parent) {
474 if (man->last->type == MAN_ROOT)
476 if ( ! man_valid_post(man))
483 * Same here regarding whether we're back at the root.
486 if (man->last->type != MAN_ROOT && ! man_valid_post(man))
494 man_macroend(struct man *man)
497 return(man_unscope(man, man->first, MANDOCERR_SCOPEEXIT));
501 man_args(struct man *man, int line, int *pos, char *buf, char **v)
506 *v = start = buf + *pos;
507 assert(' ' != *start);
512 *v = mandoc_getarg(man->parse, v, line, pos);