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/* $Id$ */
/*
* Copyright (c) 2006 Nicholas Marriott <nicholas.marriott@gmail.com>
*
* 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 MIND, 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 PCRE
#include <sys/types.h>
#include <pcre.h>
#include <string.h>
#include "fdm.h"
int
re_compile(struct re *re, const char *s, int flags, char **cause)
{
const char *error;
int off;
if (s == NULL)
fatalx("null regexp");
re->str = xstrdup(s);
if (*s == '\0')
return (0);
re->flags = flags;
flags = PCRE_MULTILINE;
if (re->flags & RE_IGNCASE)
flags |= PCRE_CASELESS;
if ((re->pcre = pcre_compile(s, flags, &error, &off, NULL)) == NULL) {
*cause = xstrdup(error);
return (-1);
}
return (0);
}
int
re_string(struct re *re, const char *s, struct rmlist *rml, char **cause)
{
return (re_block(re, s, strlen(s), rml, cause));
}
int
re_block(struct re *re, const void *buf, size_t len, struct rmlist *rml,
char **cause)
{
int res, pm[NPMATCH * 3];
u_int i, j;
if (len > INT_MAX)
fatalx("buffer too big");
if (rml != NULL)
memset(rml, 0, sizeof *rml);
/* If the regexp is empty, just check whether the buffer is empty. */
if (*re->str == '\0') {
if (len == 0)
return (1);
return (0);
}
res = pcre_exec(re->pcre, NULL, buf, len, 0, 0, pm, NPMATCH * 3);
if (res < 0 && res != PCRE_ERROR_NOMATCH) {
xasprintf(cause, "%s: regexec failed", re->str);
return (-1);
}
if (rml != NULL) {
for (i = 0; i < NPMATCH; i++) {
j = i * 2;
if (pm[j + 1] <= pm[j])
break;
rml->list[i].valid = 1;
rml->list[i].so = pm[j];
rml->list[i].eo = pm[j + 1];
}
rml->valid = 1;
}
return (res != PCRE_ERROR_NOMATCH);
}
void
re_free(struct re *re)
{
xfree(re->str);
pcre_free(re->pcre);
}
#endif /* PCRE */
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