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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 PCRE2
#include <sys/types.h>
#define PCRE2_CODE_UNIT_WIDTH 8
#include <pcre2.h>
#include <string.h>
#include "fdm.h"
int
re_compile(struct re *re, const char *s, int flags, char **cause)
{
char error[256];
PCRE2_SIZE off;
int errorcode;
if (s == NULL)
fatalx("null regexp");
re->str = xstrdup(s);
if (*s == '\0')
return (0);
re->flags = flags;
flags = PCRE2_MULTILINE;
if (re->flags & RE_IGNCASE)
flags |= PCRE2_CASELESS;
re->pcre2 = pcre2_compile(s, PCRE2_ZERO_TERMINATED, flags, &errorcode,
&off, NULL);
if (re->pcre2 == NULL) {
pcre2_get_error_message(errorcode, error, sizeof(error));
*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, ret;
pcre2_match_data *pmd;
PCRE2_SIZE *ovector;
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);
}
pmd = pcre2_match_data_create_from_pattern(re->pcre2, NULL);
if (pmd == NULL)
fatalx("pcre2_match_data_create_from_pattern failed");
res = pcre2_match(re->pcre2, buf, len, 0, 0, pmd, NULL);
if (res > 0) {
if (rml != NULL) {
if (res > NPMATCH)
res = NPMATCH;
ovector = pcre2_get_ovector_pointer(pmd);
for (i = 0; i < res; i++) {
j = i * 2;
if (ovector[j + 1] < ovector[j])
break;
rml->list[i].valid = 1;
rml->list[i].so = ovector[j];
rml->list[i].eo = ovector[j + 1];
}
rml->valid = 1;
}
ret = 1;
} else if (res == PCRE2_ERROR_NOMATCH)
ret = 0;
else {
xasprintf(cause, "%s: regexec failed", re->str);
ret = -1;
}
pcre2_match_data_free(pmd);
return (ret);
}
void
re_free(struct re *re)
{
xfree(re->str);
pcre2_code_free(re->pcre2);
}
#endif /* PCRE2 */
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