/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "regexp.h"
#if defined(GIT_REGEX_BUILTIN) || defined(GIT_REGEX_PCRE)
int git_regexp_compile(git_regexp *r, const char *pattern, int flags)
{
int erroffset, cflags = 0;
const char *error = NULL;
if (flags & GIT_REGEXP_ICASE)
cflags |= PCRE_CASELESS;
if ((*r = pcre_compile(pattern, cflags, &error, &erroffset, NULL)) == NULL) {
git_error_set_str(GIT_ERROR_REGEX, error);
return GIT_EINVALIDSPEC;
}
return 0;
}
void git_regexp_dispose(git_regexp *r)
{
pcre_free(*r);
*r = NULL;
}
int git_regexp_match(const git_regexp *r, const char *string)
{
int error;
if ((error = pcre_exec(*r, NULL, string, (int) strlen(string), 0, 0, NULL, 0)) < 0)
return (error == PCRE_ERROR_NOMATCH) ? GIT_ENOTFOUND : GIT_EINVALIDSPEC;
return 0;
}
int git_regexp_search(const git_regexp *r, const char *string, size_t nmatches, git_regmatch *matches)
{
int static_ovec[9] = {0}, *ovec;
int error;
size_t i;
/* The ovec array always needs to be a multiple of three */
if (nmatches <= ARRAY_SIZE(static_ovec) / 3)
ovec = static_ovec;
else
ovec = git__calloc(nmatches * 3, sizeof(*ovec));
GIT_ERROR_CHECK_ALLOC(ovec);
if ((error = pcre_exec(*r, NULL, string, (int) strlen(string), 0, 0, ovec, (int) nmatches * 3)) < 0)
goto out;
if (error == 0)
error = (int) nmatches;
for (i = 0; i < (unsigned int) error; i++) {
matches[i].start = (ovec[i * 2] < 0) ? -1 : ovec[i * 2];
matches[i].end = (ovec[i * 2 + 1] < 0) ? -1 : ovec[i * 2 + 1];
}
for (i = (unsigned int) error; i < nmatches; i++)
matches[i].start = matches[i].end = -1;
out:
if (nmatches > ARRAY_SIZE(static_ovec) / 3)
git__free(ovec);
if (error < 0)
return (error == PCRE_ERROR_NOMATCH) ? GIT_ENOTFOUND : GIT_EINVALIDSPEC;
return 0;
}
#elif defined(GIT_REGEX_PCRE2)
int git_regexp_compile(git_regexp *r, const char *pattern, int flags)
{
unsigned char errmsg[1024];
PCRE2_SIZE erroff;
int error, cflags = 0;
if (flags & GIT_REGEXP_ICASE)
cflags |= PCRE2_CASELESS;
if ((*r = pcre2_compile((const unsigned char *) pattern, PCRE2_ZERO_TERMINATED,
cflags, &error, &erroff, NULL)) == NULL) {
pcre2_get_error_message(error, errmsg, sizeof(errmsg));
git_error_set_str(GIT_ERROR_REGEX, (char *) errmsg);
return GIT_EINVALIDSPEC;
}
return 0;
}
void git_regexp_dispose(git_regexp *r)
{
pcre2_code_free(*r);
*r = NULL;
}
int git_regexp_match(const git_regexp *r, const char *string)
{
pcre2_match_data *data;
int error;
data = pcre2_match_data_create(1, NULL);
GIT_ERROR_CHECK_ALLOC(data);
if ((error = pcre2_match(*r, (const unsigned char *) string, strlen(string),
0, 0, data, NULL)) < 0)
return (error == PCRE2_ERROR_NOMATCH) ? GIT_ENOTFOUND : GIT_EINVALIDSPEC;
pcre2_match_data_free(data);
return 0;
}
int git_regexp_search(const git_regexp *r, const char *string, size_t nmatches, git_regmatch *matches)
{
pcre2_match_data *data = NULL;
PCRE2_SIZE *ovec;
int error;
size_t i;
if ((data = pcre2_match_data_create(nmatches, NULL)) == NULL) {
git_error_set_oom();
goto out;
}
if ((error = pcre2_match(*r, (const unsigned char *) string, strlen(string),
0, 0, data, NULL)) < 0)
goto out;
if (error == 0 || (unsigned int) error > nmatches)
error = nmatches;
ovec = pcre2_get_ovector_pointer(data);
for (i = 0; i < (unsigned int) error; i++) {
matches[i].start = (ovec[i * 2] == PCRE2_UNSET) ? -1 : (ssize_t) ovec[i * 2];
matches[i].end = (ovec[i * 2 + 1] == PCRE2_UNSET) ? -1 : (ssize_t) ovec[i * 2 + 1];
}
for (i = (unsigned int) error; i < nmatches; i++)
matches[i].start = matches[i].end = -1;
out:
pcre2_match_data_free(data);
if (error < 0)
return (error == PCRE2_ERROR_NOMATCH) ? GIT_ENOTFOUND : GIT_EINVALIDSPEC;
return 0;
}
#elif defined(GIT_REGEX_REGCOMP) || defined(GIT_REGEX_REGCOMP_L)
#if defined(GIT_REGEX_REGCOMP_L)
# include <xlocale.h>
#endif
int git_regexp_compile(git_regexp *r, const char *pattern, int flags)
{
int cflags = REG_EXTENDED, error;
char errmsg[1024];
if (flags & GIT_REGEXP_ICASE)
cflags |= REG_ICASE;
# if defined(GIT_REGEX_REGCOMP)
if ((error = regcomp(r, pattern, cflags)) != 0)
# else
if ((error = regcomp_l(r, pattern, cflags, (locale_t) 0)) != 0)
# endif
{
regerror(error, r, errmsg, sizeof(errmsg));
git_error_set_str(GIT_ERROR_REGEX, errmsg);
return GIT_EINVALIDSPEC;
}
return 0;
}
void git_regexp_dispose(git_regexp *r)
{
regfree(r);
}
int git_regexp_match(const git_regexp *r, const char *string)
{
int error;
if ((error = regexec(r, string, 0, NULL, 0)) != 0)
return (error == REG_NOMATCH) ? GIT_ENOTFOUND : GIT_EINVALIDSPEC;
return 0;
}
int git_regexp_search(const git_regexp *r, const char *string, size_t nmatches, git_regmatch *matches)
{
regmatch_t static_m[3], *m;
int error;
size_t i;
if (nmatches <= ARRAY_SIZE(static_m))
m = static_m;
else
m = git__calloc(nmatches, sizeof(*m));
if ((error = regexec(r, string, nmatches, m, 0)) != 0)
goto out;
for (i = 0; i < nmatches; i++) {
matches[i].start = (m[i].rm_so < 0) ? -1 : m[i].rm_so;
matches[i].end = (m[i].rm_eo < 0) ? -1 : m[i].rm_eo;
}
out:
if (nmatches > ARRAY_SIZE(static_m))
git__free(m);
if (error)
return (error == REG_NOMATCH) ? GIT_ENOTFOUND : GIT_EINVALIDSPEC;
return 0;
}
#endif
