397 lines
6.8 KiB
C
397 lines
6.8 KiB
C
/* $Id: mandoc.c,v 1.19 2010/06/19 20:46:28 kristaps Exp $ */
|
|
/*
|
|
* Copyright (c) 2008, 2009 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 *);
|
|
static int spec_norm(char *, int);
|
|
|
|
|
|
/*
|
|
* "Normalise" a special string by converting its ASCII_HYPH entries
|
|
* into actual hyphens.
|
|
*/
|
|
static int
|
|
spec_norm(char *p, int sz)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < sz; i++)
|
|
if (ASCII_HYPH == p[i])
|
|
p[i] = '-';
|
|
|
|
return(sz);
|
|
}
|
|
|
|
|
|
int
|
|
mandoc_special(char *p)
|
|
{
|
|
int terminator; /* Terminator for \s. */
|
|
int lim; /* Limit for N in \s. */
|
|
int c, i;
|
|
char *sv;
|
|
|
|
sv = p;
|
|
|
|
if ('\\' != *p++)
|
|
return(spec_norm(sv, 0));
|
|
|
|
switch (*p) {
|
|
case ('\''):
|
|
/* FALLTHROUGH */
|
|
case ('`'):
|
|
/* FALLTHROUGH */
|
|
case ('q'):
|
|
/* FALLTHROUGH */
|
|
case (ASCII_HYPH):
|
|
/* FALLTHROUGH */
|
|
case ('-'):
|
|
/* FALLTHROUGH */
|
|
case ('~'):
|
|
/* FALLTHROUGH */
|
|
case ('^'):
|
|
/* FALLTHROUGH */
|
|
case ('%'):
|
|
/* FALLTHROUGH */
|
|
case ('0'):
|
|
/* FALLTHROUGH */
|
|
case (' '):
|
|
/* FALLTHROUGH */
|
|
case ('}'):
|
|
/* FALLTHROUGH */
|
|
case ('|'):
|
|
/* FALLTHROUGH */
|
|
case ('&'):
|
|
/* FALLTHROUGH */
|
|
case ('.'):
|
|
/* FALLTHROUGH */
|
|
case (':'):
|
|
/* FALLTHROUGH */
|
|
case ('c'):
|
|
/* FALLTHROUGH */
|
|
case ('e'):
|
|
return(spec_norm(sv, 2));
|
|
case ('s'):
|
|
if ('\0' == *++p)
|
|
return(spec_norm(sv, 2));
|
|
|
|
c = 2;
|
|
terminator = 0;
|
|
lim = 1;
|
|
|
|
if (*p == '\'') {
|
|
lim = 0;
|
|
terminator = 1;
|
|
++p;
|
|
++c;
|
|
} else if (*p == '[') {
|
|
lim = 0;
|
|
terminator = 2;
|
|
++p;
|
|
++c;
|
|
} else if (*p == '(') {
|
|
lim = 2;
|
|
terminator = 3;
|
|
++p;
|
|
++c;
|
|
}
|
|
|
|
if (*p == '+' || *p == '-') {
|
|
++p;
|
|
++c;
|
|
}
|
|
|
|
if (*p == '\'') {
|
|
if (terminator)
|
|
return(spec_norm(sv, 0));
|
|
lim = 0;
|
|
terminator = 1;
|
|
++p;
|
|
++c;
|
|
} else if (*p == '[') {
|
|
if (terminator)
|
|
return(spec_norm(sv, 0));
|
|
lim = 0;
|
|
terminator = 2;
|
|
++p;
|
|
++c;
|
|
} else if (*p == '(') {
|
|
if (terminator)
|
|
return(spec_norm(sv, 0));
|
|
lim = 2;
|
|
terminator = 3;
|
|
++p;
|
|
++c;
|
|
}
|
|
|
|
/* TODO: needs to handle floating point. */
|
|
|
|
if ( ! isdigit((u_char)*p))
|
|
return(spec_norm(sv, 0));
|
|
|
|
for (i = 0; isdigit((u_char)*p); i++) {
|
|
if (lim && i >= lim)
|
|
break;
|
|
++p;
|
|
++c;
|
|
}
|
|
|
|
if (terminator && terminator < 3) {
|
|
if (1 == terminator && *p != '\'')
|
|
return(spec_norm(sv, 0));
|
|
if (2 == terminator && *p != ']')
|
|
return(spec_norm(sv, 0));
|
|
++p;
|
|
++c;
|
|
}
|
|
|
|
return(spec_norm(sv, c));
|
|
case ('f'):
|
|
/* FALLTHROUGH */
|
|
case ('F'):
|
|
/* FALLTHROUGH */
|
|
case ('*'):
|
|
if ('\0' == *++p || isspace((u_char)*p))
|
|
return(spec_norm(sv, 0));
|
|
switch (*p) {
|
|
case ('('):
|
|
if ('\0' == *++p || isspace((u_char)*p))
|
|
return(spec_norm(sv, 0));
|
|
return(spec_norm(sv, 4));
|
|
case ('['):
|
|
for (c = 3, p++; *p && ']' != *p; p++, c++)
|
|
if (isspace((u_char)*p))
|
|
break;
|
|
return(spec_norm(sv, *p == ']' ? c : 0));
|
|
default:
|
|
break;
|
|
}
|
|
return(spec_norm(sv, 3));
|
|
case ('('):
|
|
if ('\0' == *++p || isspace((u_char)*p))
|
|
return(spec_norm(sv, 0));
|
|
if ('\0' == *++p || isspace((u_char)*p))
|
|
return(spec_norm(sv, 0));
|
|
return(spec_norm(sv, 4));
|
|
case ('['):
|
|
break;
|
|
default:
|
|
return(spec_norm(sv, 0));
|
|
}
|
|
|
|
for (c = 3, p++; *p && ']' != *p; p++, c++)
|
|
if (isspace((u_char)*p))
|
|
break;
|
|
|
|
return(spec_norm(sv, *p == ']' ? c : 0));
|
|
}
|
|
|
|
|
|
void *
|
|
mandoc_calloc(size_t num, size_t size)
|
|
{
|
|
void *ptr;
|
|
|
|
ptr = calloc(num, size);
|
|
if (NULL == ptr) {
|
|
perror(NULL);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
return(ptr);
|
|
}
|
|
|
|
|
|
void *
|
|
mandoc_malloc(size_t size)
|
|
{
|
|
void *ptr;
|
|
|
|
ptr = malloc(size);
|
|
if (NULL == ptr) {
|
|
perror(NULL);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
return(ptr);
|
|
}
|
|
|
|
|
|
void *
|
|
mandoc_realloc(void *ptr, size_t size)
|
|
{
|
|
|
|
ptr = realloc(ptr, size);
|
|
if (NULL == ptr) {
|
|
perror(NULL);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
return(ptr);
|
|
}
|
|
|
|
|
|
char *
|
|
mandoc_strdup(const char *ptr)
|
|
{
|
|
char *p;
|
|
|
|
p = strdup(ptr);
|
|
if (NULL == p) {
|
|
perror(NULL);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
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)
|
|
{
|
|
|
|
if (0 == sz)
|
|
return(0);
|
|
|
|
/*
|
|
* End-of-sentence recognition must include situations where
|
|
* some symbols, such as `)', allow prior EOS punctuation to
|
|
* propogate outward.
|
|
*/
|
|
|
|
for ( ; sz; sz--) {
|
|
switch (p[(int)sz - 1]) {
|
|
case ('\"'):
|
|
/* FALLTHROUGH */
|
|
case ('\''):
|
|
/* FALLTHROUGH */
|
|
case (']'):
|
|
/* FALLTHROUGH */
|
|
case (')'):
|
|
break;
|
|
case ('.'):
|
|
/* Escaped periods. */
|
|
if (sz > 1 && '\\' == p[(int)sz - 2])
|
|
return(0);
|
|
/* FALLTHROUGH */
|
|
case ('!'):
|
|
/* FALLTHROUGH */
|
|
case ('?'):
|
|
return(1);
|
|
default:
|
|
return(0);
|
|
}
|
|
}
|
|
|
|
return(0);
|
|
}
|
|
|
|
|
|
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);
|
|
}
|