/* $Id$ */
/*
* Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
*
* 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
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR 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 <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include "mandoc.h"
#include "libmandoc.h"
static int a2time(time_t *, const char *, const char *);
int
mandoc_special(char *p)
{
int len, i;
char term;
char *sv;
len = 0;
term = '\0';
sv = p;
assert('\\' == *p);
p++;
switch (*p++) {
#if 0
case ('Z'):
/* FALLTHROUGH */
case ('X'):
/* FALLTHROUGH */
case ('x'):
/* FALLTHROUGH */
case ('S'):
/* FALLTHROUGH */
case ('R'):
/* FALLTHROUGH */
case ('N'):
/* FALLTHROUGH */
case ('l'):
/* FALLTHROUGH */
case ('L'):
/* FALLTHROUGH */
case ('H'):
/* FALLTHROUGH */
case ('h'):
/* FALLTHROUGH */
case ('D'):
/* FALLTHROUGH */
case ('C'):
/* FALLTHROUGH */
case ('b'):
/* FALLTHROUGH */
case ('B'):
/* FALLTHROUGH */
case ('a'):
/* FALLTHROUGH */
case ('A'):
if (*p++ != '\'')
return(0);
term = '\'';
break;
#endif
case ('h'):
/* FALLTHROUGH */
case ('v'):
/* FALLTHROUGH */
case ('s'):
if (ASCII_HYPH == *p)
*p = '-';
i = 0;
if ('+' == *p || '-' == *p) {
p++;
i = 1;
}
switch (*p++) {
case ('('):
len = 2;
break;
case ('['):
term = ']';
break;
case ('\''):
term = '\'';
break;
case ('0'):
i = 1;
/* FALLTHROUGH */
default:
len = 1;
p--;
break;
}
if (ASCII_HYPH == *p)
*p = '-';
if ('+' == *p || '-' == *p) {
if (i)
return(0);
p++;
}
/* Handle embedded numerical subexp or escape. */
if ('(' == *p) {
while (*p && ')' != *p)
if ('\\' == *p++) {
i = mandoc_special(--p);
if (0 == i)
return(0);
p += i;
}
if (')' == *p++)
break;
return(0);
} else if ('\\' == *p) {
if (0 == (i = mandoc_special(p)))
return(0);
p += i;
}
break;
#if 0
case ('Y'):
/* FALLTHROUGH */
case ('V'):
/* FALLTHROUGH */
case ('$'):
/* FALLTHROUGH */
case ('n'):
/* FALLTHROUGH */
#endif
case ('k'):
/* FALLTHROUGH */
case ('M'):
/* FALLTHROUGH */
case ('m'):
/* FALLTHROUGH */
case ('f'):
/* FALLTHROUGH */
case ('F'):
/* FALLTHROUGH */
case ('*'):
switch (*p++) {
case ('('):
len = 2;
break;
case ('['):
term = ']';
break;
default:
len = 1;
p--;
break;
}
break;
case ('('):
len = 2;
break;
case ('['):
term = ']';
break;
case ('z'):
len = 1;
if ('\\' == *p) {
if (0 == (i = mandoc_special(p)))
return(0);
p += i;
return(*p ? (int)(p - sv) : 0);
}
break;
case ('o'):
/* FALLTHROUGH */
case ('w'):
if ('\'' == *p++) {
term = '\'';
break;
}
/* FALLTHROUGH */
default:
len = 1;
p--;
break;
}
if (term) {
for ( ; *p && term != *p; p++)
if (ASCII_HYPH == *p)
*p = '-';
return(*p ? (int)(p - sv) : 0);
}
for (i = 0; *p && i < len; i++, p++)
if (ASCII_HYPH == *p)
*p = '-';
return(i == len ? (int)(p - sv) : 0);
}
void *
mandoc_calloc(size_t num, size_t size)
{
void *ptr;
ptr = calloc(num, size);
if (NULL == ptr) {
perror(NULL);
exit(MANDOCLEVEL_SYSERR);
}
return(ptr);
}
void *
mandoc_malloc(size_t size)
{
void *ptr;
ptr = malloc(size);
if (NULL == ptr) {
perror(NULL);
exit(MANDOCLEVEL_SYSERR);
}
return(ptr);
}
void *
mandoc_realloc(void *ptr, size_t size)
{
ptr = realloc(ptr, size);
if (NULL == ptr) {
perror(NULL);
exit(MANDOCLEVEL_SYSERR);
}
return(ptr);
}
char *
mandoc_strdup(const char *ptr)
{
char *p;
p = strdup(ptr);
if (NULL == p) {
perror(NULL);
exit(MANDOCLEVEL_SYSERR);
}
return(p);
}
static int
a2time(time_t *t, const char *fmt, const char *p)
{
struct tm tm;
char *pp;
memset(&tm, 0, sizeof(struct tm));
pp = strptime(p, fmt, &tm);
if (NULL != pp && '\0' == *pp) {
*t = mktime(&tm);
return(1);
}
return(0);
}
/*
* Convert from a manual date string (see mdoc(7) and man(7)) into a
* date according to the stipulated date type.
*/
time_t
mandoc_a2time(int flags, const char *p)
{
time_t t;
if (MTIME_MDOCDATE & flags) {
if (0 == strcmp(p, "$" "Mdocdate$"))
return(time(NULL));
if (a2time(&t, "$" "Mdocdate: %b %d %Y $", p))
return(t);
}
if (MTIME_CANONICAL & flags || MTIME_REDUCED & flags)
if (a2time(&t, "%b %d, %Y", p))
return(t);
if (MTIME_ISO_8601 & flags)
if (a2time(&t, "%Y-%m-%d", p))
return(t);
if (MTIME_REDUCED & flags) {
if (a2time(&t, "%d, %Y", p))
return(t);
if (a2time(&t, "%Y", p))
return(t);
}
return(0);
}
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
* propogate 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);
}
int
mandoc_hyph(const char *start, const char *c)
{
/*
* Choose whether to break at a hyphenated character. We only
* do this if it's free-standing within a word.
*/
/* Skip first/last character of buffer. */
if (c == start || '\0' == *(c + 1))
return(0);
/* Skip first/last character of word. */
if ('\t' == *(c + 1) || '\t' == *(c - 1))
return(0);
if (' ' == *(c + 1) || ' ' == *(c - 1))
return(0);
/* Skip double invocations. */
if ('-' == *(c + 1) || '-' == *(c - 1))
return(0);
/* Skip escapes. */
if ('\\' == *(c - 1))
return(0);
return(1);
}
