1 /* $Id: mandoc.c,v 1.83 2014/07/06 19:09:00 schwarze Exp $ */
3 * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2011, 2012, 2013, 2014 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 AUTHORS DISCLAIM ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS 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.
22 #include <sys/types.h>
34 #include "mandoc_aux.h"
35 #include "libmandoc.h"
39 static int a2time(time_t *, const char *, const char *);
40 static char *time2a(time_t);
44 mandoc_escape(const char **end, const char **start, int *sz)
46 const char *local_start;
52 * When the caller doesn't provide return storage,
62 * Beyond the backslash, at least one input character
63 * is part of the escape sequence. With one exception
64 * (see below), that character won't be returned.
72 switch ((*start)[-1]) {
74 * First the glyphs. There are several different forms of
75 * these, but each eventually returns a substring of the glyph
85 * Unicode escapes are defined in groff as \[uXXXX] to
86 * \[u10FFFF], where the contained value must be a valid
87 * Unicode codepoint. Here, however, only check whether
88 * it's not a zero-width escape.
90 if ('u' == (*start)[0] && ']' != (*start)[1])
98 if ('u' == (*start)[0] && '\'' != (*start)[1])
101 gly = ESCAPE_SPECIAL;
106 * Escapes taking no arguments at all.
111 return(ESCAPE_IGNORE);
114 * The \z escape is supposed to output the following
115 * character without advancing the cursor position.
116 * Since we are mostly dealing with terminal mode,
117 * let us just skip the next character.
120 return(ESCAPE_SKIPCHAR);
123 * Handle all triggers matching \X(xy, \Xx, and \X[xxxx], where
124 * 'X' is the trigger. These have opaque sub-strings.
144 if (ESCAPE_ERROR == gly)
162 * These escapes are of the form \X'Y', where 'X' is the trigger
163 * and 'Y' is any string. These have opaque sub-strings.
164 * The \B and \w escapes are handled in roff.c, roff_res().
180 return(ESCAPE_ERROR);
187 * These escapes are of the form \X'N', where 'X' is the trigger
188 * and 'N' resolves to a numerical expression.
203 if (strchr(" %&()*+-./0123456789:<=>", **start)) {
205 return(ESCAPE_ERROR);
213 * Special handling for the numbered character escape.
214 * XXX Do any other escapes need similar handling?
218 return(ESCAPE_ERROR);
220 if (isdigit((unsigned char)**start)) {
222 return(ESCAPE_IGNORE);
225 while (isdigit((unsigned char)**end))
230 return(ESCAPE_NUMBERED);
233 * Sizes get a special category of their own.
238 /* See +/- counts as a sign. */
239 if ('+' == **end || '-' == **end || ASCII_HYPH == **end)
263 * Anything else is assumed to be a glyph.
264 * In this case, pass back the character after the backslash.
267 gly = ESCAPE_SPECIAL;
273 assert(ESCAPE_ERROR != gly);
276 * Read up to the terminating character,
277 * paying attention to nested escapes.
281 while (**end != term) {
284 return(ESCAPE_ERROR);
288 mandoc_escape(end, NULL, NULL))
289 return(ESCAPE_ERROR);
296 *sz = (*end)++ - *start;
299 if ((size_t)*sz > strlen(*start))
300 return(ESCAPE_ERROR);
304 /* Run post-processors. */
309 if ('C' == **start) {
311 * Treat constant-width font modes
312 * just like regular font modes.
317 if ('B' == (*start)[0] && 'I' == (*start)[1])
328 gly = ESCAPE_FONTBOLD;
333 gly = ESCAPE_FONTITALIC;
336 gly = ESCAPE_FONTPREV;
341 gly = ESCAPE_FONTROMAN;
346 if (1 == *sz && 'c' == **start)
347 gly = ESCAPE_NOSPACE;
357 * Parse a quoted or unquoted roff-style request or macro argument.
358 * Return a pointer to the parsed argument, which is either the original
359 * pointer or advanced by one byte in case the argument is quoted.
360 * NUL-terminate the argument in place.
361 * Collapse pairs of quotes inside quoted arguments.
362 * Advance the argument pointer to the next argument,
363 * or to the NUL byte terminating the argument line.
366 mandoc_getarg(struct mparse *parse, char **cpp, int ln, int *pos)
369 int quoted, pairs, white;
371 /* Quoting can only start with a new word. */
381 for (cp = start; '\0' != *cp; cp++) {
384 * Move the following text left
385 * after quoted quotes and after "\\" and "\t".
392 * In copy mode, translate double to single
393 * backslashes and backslash-t to literal tabs.
404 /* Skip escaped blanks. */
411 } else if (0 == quoted) {
413 /* Unescaped blanks end unquoted args. */
417 } else if ('"' == cp[0]) {
419 /* Quoted quotes collapse. */
423 /* Unquoted quotes end quoted args. */
430 /* Quoted argument without a closing quote. */
432 mandoc_msg(MANDOCERR_ARG_QUOTE, parse, ln, *pos, NULL);
434 /* NUL-terminate this argument and move to the next one. */
442 *pos += (int)(cp - start) + (quoted ? 1 : 0);
445 if ('\0' == *cp && (white || ' ' == cp[-1]))
446 mandoc_msg(MANDOCERR_SPACE_EOL, parse, ln, *pos, NULL);
452 a2time(time_t *t, const char *fmt, const char *p)
457 memset(&tm, 0, sizeof(struct tm));
461 pp = strptime(p, fmt, &tm);
463 if (NULL != pp && '\0' == *pp) {
483 * up to 9 characters for the month (September) + blank
484 * up to 2 characters for the day + comma + blank
485 * 4 characters for the year and a terminating '\0'
487 p = buf = mandoc_malloc(10 + 4 + 4 + 1);
489 if (0 == (ssz = strftime(p, 10 + 1, "%B ", tm)))
493 if (-1 == (isz = snprintf(p, 4 + 1, "%d, ", tm->tm_mday)))
497 if (0 == strftime(p, 4 + 1, "%Y", tm))
507 mandoc_normdate(struct mparse *parse, char *in, int ln, int pos)
512 if (NULL == in || '\0' == *in ||
513 0 == strcmp(in, "$" "Mdocdate$")) {
514 mandoc_msg(MANDOCERR_DATE_MISSING, parse, ln, pos, NULL);
517 else if (a2time(&t, "%Y-%m-%d", in))
519 else if (!a2time(&t, "$" "Mdocdate: %b %d %Y $", in) &&
520 !a2time(&t, "%b %d, %Y", in)) {
521 mandoc_msg(MANDOCERR_DATE_BAD, parse, ln, pos, in);
524 out = t ? time2a(t) : NULL;
525 return(out ? out : mandoc_strdup(in));
529 mandoc_eos(const char *p, size_t sz)
538 * End-of-sentence recognition must include situations where
539 * some symbols, such as `)', allow prior EOS punctuation to
543 enclosed = found = 0;
544 for (q = p + (int)sz - 1; q >= p; q--) {
564 return(found && (!enclosed || isalnum((unsigned char)*q)));
568 return(found && !enclosed);
572 * Convert a string to a long that may not be <0.
573 * If the string is invalid, or is less than 0, return -1.
576 mandoc_strntoi(const char *p, size_t sz, int base)
589 v = strtol(buf, &ep, base);
591 if (buf[0] == '\0' || *ep != '\0')