-/* $Id: mandoc.c,v 1.5 2009/10/30 05:58:38 kristaps Exp $ */
+/* $Id: mandoc.c,v 1.68 2013/08/08 20:07:47 schwarze Exp $ */
/*
- * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
+ * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2011, 2012, 2013 Ingo Schwarze <schwarze@openbsd.org>
*
* 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 AUTHOR DISCLAIMS ALL WARRANTIES
+ * 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 AUTHOR BE LIABLE FOR
+ * 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.
*/
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
#include <sys/types.h>
#include <assert.h>
#include <ctype.h>
+#include <errno.h>
+#include <limits.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
+#include <time.h>
+#include "mandoc.h"
#include "libmandoc.h"
-int
-mandoc_special(const char *p)
+#define DATESIZE 32
+
+static int a2time(time_t *, const char *, const char *);
+static char *time2a(time_t);
+
+
+enum mandoc_esc
+mandoc_escape(const char **end, const char **start, int *sz)
{
- int c;
-
- if ('\\' != *p++)
- return(0);
+ const char *local_start;
+ int local_sz;
+ char term;
+ enum mandoc_esc gly;
+
+ /*
+ * When the caller doesn't provide return storage,
+ * use local storage.
+ */
+
+ if (NULL == start)
+ start = &local_start;
+ if (NULL == sz)
+ sz = &local_sz;
+
+ /*
+ * Beyond the backslash, at least one input character
+ * is part of the escape sequence. With one exception
+ * (see below), that character won't be returned.
+ */
- switch (*p) {
- case ('\\'):
+ gly = ESCAPE_ERROR;
+ *start = ++*end;
+ *sz = 0;
+ term = '\0';
+
+ switch ((*start)[-1]) {
+ /*
+ * First the glyphs. There are several different forms of
+ * these, but each eventually returns a substring of the glyph
+ * name.
+ */
+ case ('('):
+ gly = ESCAPE_SPECIAL;
+ *sz = 2;
+ break;
+ case ('['):
+ gly = ESCAPE_SPECIAL;
+ /*
+ * Unicode escapes are defined in groff as \[uXXXX] to
+ * \[u10FFFF], where the contained value must be a valid
+ * Unicode codepoint. Here, however, only check whether
+ * it's not a zero-width escape.
+ */
+ if ('u' == (*start)[0] && ']' != (*start)[1])
+ gly = ESCAPE_UNICODE;
+ term = ']';
+ break;
+ case ('C'):
+ if ('\'' != **start)
+ return(ESCAPE_ERROR);
+ gly = ESCAPE_SPECIAL;
+ *start = ++*end;
+ term = '\'';
+ break;
+
+ /*
+ * The \z escape is supposed to output the following
+ * character without advancing the cursor position.
+ * Since we are mostly dealing with terminal mode,
+ * let us just skip the next character.
+ */
+ case ('z'):
+ return(ESCAPE_SKIPCHAR);
+
+ /*
+ * Handle all triggers matching \X(xy, \Xx, and \X[xxxx], where
+ * 'X' is the trigger. These have opaque sub-strings.
+ */
+ case ('F'):
+ /* FALLTHROUGH */
+ case ('g'):
/* FALLTHROUGH */
- case ('\''):
+ case ('k'):
/* FALLTHROUGH */
- case ('`'):
+ case ('M'):
/* FALLTHROUGH */
- case ('q'):
+ case ('m'):
/* FALLTHROUGH */
- case ('-'):
+ case ('n'):
/* FALLTHROUGH */
- case ('~'):
+ case ('V'):
/* FALLTHROUGH */
- case ('^'):
+ case ('Y'):
+ gly = ESCAPE_IGNORE;
/* FALLTHROUGH */
- case ('%'):
+ case ('f'):
+ if (ESCAPE_ERROR == gly)
+ gly = ESCAPE_FONT;
+ switch (**start) {
+ case ('('):
+ *start = ++*end;
+ *sz = 2;
+ break;
+ case ('['):
+ *start = ++*end;
+ term = ']';
+ break;
+ default:
+ *sz = 1;
+ break;
+ }
+ break;
+
+ /*
+ * These escapes are of the form \X'Y', where 'X' is the trigger
+ * and 'Y' is any string. These have opaque sub-strings.
+ */
+ case ('A'):
/* FALLTHROUGH */
- case ('0'):
+ case ('b'):
/* FALLTHROUGH */
- case (' '):
+ case ('D'):
/* FALLTHROUGH */
- case ('|'):
+ case ('o'):
/* FALLTHROUGH */
- case ('&'):
+ case ('R'):
/* FALLTHROUGH */
- case ('.'):
+ case ('X'):
/* FALLTHROUGH */
- case (':'):
+ case ('Z'):
+ if ('\'' != **start)
+ return(ESCAPE_ERROR);
+ gly = ESCAPE_IGNORE;
+ *start = ++*end;
+ term = '\'';
+ break;
+
+ /*
+ * These escapes are of the form \X'N', where 'X' is the trigger
+ * and 'N' resolves to a numerical expression.
+ */
+ case ('B'):
/* FALLTHROUGH */
- case ('c'):
- return(2);
- case ('e'):
- return(2);
- case ('f'):
- if (0 == *++p || ! isgraph((u_char)*p))
- return(0);
- return(3);
- case ('*'):
- if (0 == *++p || ! isgraph((u_char)*p))
- return(0);
- switch (*p) {
+ case ('h'):
+ /* FALLTHROUGH */
+ case ('H'):
+ /* FALLTHROUGH */
+ case ('L'):
+ /* FALLTHROUGH */
+ case ('l'):
+ gly = ESCAPE_NUMBERED;
+ /* FALLTHROUGH */
+ case ('S'):
+ /* FALLTHROUGH */
+ case ('v'):
+ /* FALLTHROUGH */
+ case ('w'):
+ /* FALLTHROUGH */
+ case ('x'):
+ if ('\'' != **start)
+ return(ESCAPE_ERROR);
+ if (ESCAPE_ERROR == gly)
+ gly = ESCAPE_IGNORE;
+ *start = ++*end;
+ term = '\'';
+ break;
+
+ /*
+ * Special handling for the numbered character escape.
+ * XXX Do any other escapes need similar handling?
+ */
+ case ('N'):
+ if ('\0' == **start)
+ return(ESCAPE_ERROR);
+ (*end)++;
+ if (isdigit((unsigned char)**start)) {
+ *sz = 1;
+ return(ESCAPE_IGNORE);
+ }
+ (*start)++;
+ while (isdigit((unsigned char)**end))
+ (*end)++;
+ *sz = *end - *start;
+ if ('\0' != **end)
+ (*end)++;
+ return(ESCAPE_NUMBERED);
+
+ /*
+ * Sizes get a special category of their own.
+ */
+ case ('s'):
+ gly = ESCAPE_IGNORE;
+
+ /* See +/- counts as a sign. */
+ if ('+' == **end || '-' == **end || ASCII_HYPH == **end)
+ (*end)++;
+
+ switch (**end) {
case ('('):
- if (0 == *++p || ! isgraph((u_char)*p))
- return(0);
- return(4);
+ *start = ++*end;
+ *sz = 2;
+ break;
case ('['):
- for (c = 3, p++; *p && ']' != *p; p++, c++)
- if ( ! isgraph((u_char)*p))
- break;
- return(*p == ']' ? c : 0);
+ *start = ++*end;
+ term = ']';
+ break;
+ case ('\''):
+ *start = ++*end;
+ term = '\'';
+ break;
default:
+ *sz = 1;
break;
}
- return(3);
- case ('('):
- if (0 == *++p || ! isgraph((u_char)*p))
- return(0);
- if (0 == *++p || ! isgraph((u_char)*p))
- return(0);
- return(4);
- case ('['):
+
break;
+
+ /*
+ * Anything else is assumed to be a glyph.
+ * In this case, pass back the character after the backslash.
+ */
default:
- return(0);
+ gly = ESCAPE_SPECIAL;
+ *start = --*end;
+ *sz = 1;
+ break;
+ }
+
+ assert(ESCAPE_ERROR != gly);
+
+ /*
+ * Read up to the terminating character,
+ * paying attention to nested escapes.
+ */
+
+ if ('\0' != term) {
+ while (**end != term) {
+ switch (**end) {
+ case ('\0'):
+ return(ESCAPE_ERROR);
+ case ('\\'):
+ (*end)++;
+ if (ESCAPE_ERROR ==
+ mandoc_escape(end, NULL, NULL))
+ return(ESCAPE_ERROR);
+ break;
+ default:
+ (*end)++;
+ break;
+ }
+ }
+ *sz = (*end)++ - *start;
+ } else {
+ assert(*sz > 0);
+ if ((size_t)*sz > strlen(*start))
+ return(ESCAPE_ERROR);
+ *end += *sz;
}
- for (c = 3, p++; *p && ']' != *p; p++, c++)
- if ( ! isgraph((u_char)*p))
+ /* Run post-processors. */
+
+ switch (gly) {
+ case (ESCAPE_FONT):
+ if (2 == *sz) {
+ if ('C' == **start) {
+ /*
+ * Treat constant-width font modes
+ * just like regular font modes.
+ */
+ (*start)++;
+ (*sz)--;
+ } else {
+ if ('B' == (*start)[0] && 'I' == (*start)[1])
+ gly = ESCAPE_FONTBI;
+ break;
+ }
+ } else if (1 != *sz)
break;
- return(*p == ']' ? c : 0);
-}
+ switch (**start) {
+ case ('3'):
+ /* FALLTHROUGH */
+ case ('B'):
+ gly = ESCAPE_FONTBOLD;
+ break;
+ case ('2'):
+ /* FALLTHROUGH */
+ case ('I'):
+ gly = ESCAPE_FONTITALIC;
+ break;
+ case ('P'):
+ gly = ESCAPE_FONTPREV;
+ break;
+ case ('1'):
+ /* FALLTHROUGH */
+ case ('R'):
+ gly = ESCAPE_FONTROMAN;
+ break;
+ }
+ break;
+ case (ESCAPE_SPECIAL):
+ if (1 == *sz && 'c' == **start)
+ gly = ESCAPE_NOSPACE;
+ break;
+ default:
+ break;
+ }
+ return(gly);
+}
void *
mandoc_calloc(size_t num, size_t size)
ptr = calloc(num, size);
if (NULL == ptr) {
- fprintf(stderr, "memory exhausted\n");
- exit(EXIT_FAILURE);
+ perror(NULL);
+ exit((int)MANDOCLEVEL_SYSERR);
}
return(ptr);
ptr = malloc(size);
if (NULL == ptr) {
- fprintf(stderr, "memory exhausted\n");
- exit(EXIT_FAILURE);
+ perror(NULL);
+ exit((int)MANDOCLEVEL_SYSERR);
}
return(ptr);
ptr = realloc(ptr, size);
if (NULL == ptr) {
- fprintf(stderr, "memory exhausted\n");
- exit(EXIT_FAILURE);
+ perror(NULL);
+ exit((int)MANDOCLEVEL_SYSERR);
}
return(ptr);
}
+char *
+mandoc_strndup(const char *ptr, size_t sz)
+{
+ char *p;
+
+ p = mandoc_malloc(sz + 1);
+ memcpy(p, ptr, sz);
+ p[(int)sz] = '\0';
+ return(p);
+}
char *
mandoc_strdup(const char *ptr)
p = strdup(ptr);
if (NULL == p) {
- fprintf(stderr, "memory exhausted\n");
- exit(EXIT_FAILURE);
+ perror(NULL);
+ exit((int)MANDOCLEVEL_SYSERR);
}
return(p);
}
+
+/*
+ * Parse a quoted or unquoted roff-style request or macro argument.
+ * Return a pointer to the parsed argument, which is either the original
+ * pointer or advanced by one byte in case the argument is quoted.
+ * Null-terminate the argument in place.
+ * Collapse pairs of quotes inside quoted arguments.
+ * Advance the argument pointer to the next argument,
+ * or to the null byte terminating the argument line.
+ */
+char *
+mandoc_getarg(struct mparse *parse, char **cpp, int ln, int *pos)
+{
+ char *start, *cp;
+ int quoted, pairs, white;
+
+ /* Quoting can only start with a new word. */
+ start = *cpp;
+ quoted = 0;
+ if ('"' == *start) {
+ quoted = 1;
+ start++;
+ }
+
+ pairs = 0;
+ white = 0;
+ for (cp = start; '\0' != *cp; cp++) {
+
+ /*
+ * Move the following text left
+ * after quoted quotes and after "\\" and "\t".
+ */
+ if (pairs)
+ cp[-pairs] = cp[0];
+
+ if ('\\' == cp[0]) {
+ /*
+ * In copy mode, translate double to single
+ * backslashes and backslash-t to literal tabs.
+ */
+ switch (cp[1]) {
+ case ('t'):
+ cp[0] = '\t';
+ /* FALLTHROUGH */
+ case ('\\'):
+ pairs++;
+ cp++;
+ break;
+ case (' '):
+ /* Skip escaped blanks. */
+ if (0 == quoted)
+ cp++;
+ break;
+ default:
+ break;
+ }
+ } else if (0 == quoted) {
+ if (' ' == cp[0]) {
+ /* Unescaped blanks end unquoted args. */
+ white = 1;
+ break;
+ }
+ } else if ('"' == cp[0]) {
+ if ('"' == cp[1]) {
+ /* Quoted quotes collapse. */
+ pairs++;
+ cp++;
+ } else {
+ /* Unquoted quotes end quoted args. */
+ quoted = 2;
+ break;
+ }
+ }
+ }
+
+ /* Quoted argument without a closing quote. */
+ if (1 == quoted)
+ mandoc_msg(MANDOCERR_BADQUOTE, parse, ln, *pos, NULL);
+
+ /* Null-terminate this argument and move to the next one. */
+ if (pairs)
+ cp[-pairs] = '\0';
+ if ('\0' != *cp) {
+ *cp++ = '\0';
+ while (' ' == *cp)
+ cp++;
+ }
+ *pos += (int)(cp - start) + (quoted ? 1 : 0);
+ *cpp = cp;
+
+ if ('\0' == *cp && (white || ' ' == cp[-1]))
+ mandoc_msg(MANDOCERR_EOLNSPACE, parse, ln, *pos, NULL);
+
+ return(start);
+}
+
+static int
+a2time(time_t *t, const char *fmt, const char *p)
+{
+ struct tm tm;
+ char *pp;
+
+ memset(&tm, 0, sizeof(struct tm));
+
+ pp = NULL;
+#ifdef HAVE_STRPTIME
+ pp = strptime(p, fmt, &tm);
+#endif
+ if (NULL != pp && '\0' == *pp) {
+ *t = mktime(&tm);
+ return(1);
+ }
+
+ return(0);
+}
+
+static char *
+time2a(time_t t)
+{
+ struct tm *tm;
+ char *buf, *p;
+ size_t ssz;
+ int isz;
+
+ tm = localtime(&t);
+
+ /*
+ * Reserve space:
+ * up to 9 characters for the month (September) + blank
+ * up to 2 characters for the day + comma + blank
+ * 4 characters for the year and a terminating '\0'
+ */
+ p = buf = mandoc_malloc(10 + 4 + 4 + 1);
+
+ if (0 == (ssz = strftime(p, 10 + 1, "%B ", tm)))
+ goto fail;
+ p += (int)ssz;
+
+ if (-1 == (isz = snprintf(p, 4 + 1, "%d, ", tm->tm_mday)))
+ goto fail;
+ p += isz;
+
+ if (0 == strftime(p, 4 + 1, "%Y", tm))
+ goto fail;
+ return(buf);
+
+fail:
+ free(buf);
+ return(NULL);
+}
+
+char *
+mandoc_normdate(struct mparse *parse, char *in, int ln, int pos)
+{
+ char *out;
+ time_t t;
+
+ if (NULL == in || '\0' == *in ||
+ 0 == strcmp(in, "$" "Mdocdate$")) {
+ mandoc_msg(MANDOCERR_NODATE, parse, ln, pos, NULL);
+ time(&t);
+ }
+ else if (a2time(&t, "%Y-%m-%d", in))
+ t = 0;
+ else if (!a2time(&t, "$" "Mdocdate: %b %d %Y $", in) &&
+ !a2time(&t, "%b %d, %Y", in)) {
+ mandoc_msg(MANDOCERR_BADDATE, parse, ln, pos, NULL);
+ t = 0;
+ }
+ out = t ? time2a(t) : NULL;
+ return(out ? out : mandoc_strdup(in));
+}
+
+int
+mandoc_eos(const char *p, size_t sz, int enclosed)
+{
+ const char *q;
+ int found;
+
+ if (0 == sz)
+ return(0);
+
+ /*
+ * End-of-sentence recognition must include situations where
+ * some symbols, such as `)', allow prior EOS punctuation to
+ * propagate outward.
+ */
+
+ found = 0;
+ for (q = p + (int)sz - 1; q >= p; q--) {
+ switch (*q) {
+ case ('\"'):
+ /* FALLTHROUGH */
+ case ('\''):
+ /* FALLTHROUGH */
+ case (']'):
+ /* FALLTHROUGH */
+ case (')'):
+ if (0 == found)
+ enclosed = 1;
+ break;
+ case ('.'):
+ /* FALLTHROUGH */
+ case ('!'):
+ /* FALLTHROUGH */
+ case ('?'):
+ found = 1;
+ break;
+ default:
+ return(found && (!enclosed || isalnum((unsigned char)*q)));
+ }
+ }
+
+ return(found && !enclosed);
+}
+
+/*
+ * Convert a string to a long that may not be <0.
+ * If the string is invalid, or is less than 0, return -1.
+ */
+int
+mandoc_strntoi(const char *p, size_t sz, int base)
+{
+ char buf[32];
+ char *ep;
+ long v;
+
+ if (sz > 31)
+ return(-1);
+
+ memcpy(buf, p, sz);
+ buf[(int)sz] = '\0';
+
+ errno = 0;
+ v = strtol(buf, &ep, base);
+
+ if (buf[0] == '\0' || *ep != '\0')
+ return(-1);
+
+ if (v > INT_MAX)
+ v = INT_MAX;
+ if (v < INT_MIN)
+ v = INT_MIN;
+
+ return((int)v);
+}
git.ckatri.com / mandoc.git / blobdiff