[SR-Dev] git:janakj/kcore: Adding files regexp.[ch] from kamailio core

Module: sip-router Branch: janakj/kcore Commit: 301e4abff0ac546969eaa6b26b97574883fcba08 URL: http://git.sip-router.org/cgi-bin/gitweb.cgi/sip-router/?a=commit;h=301e4ab… Author: Jan Janak &lt;jan(a)iptel.org&gt; Committer: Jan Janak &lt;jan(a)iptel.org&gt; Date: Mon Mar 16 15:23:26 2009 +0100 Adding files regexp.[ch] from kamailio core --- lib/kcore/regexp.c | 122 ++++++++++++++++++++++++++++++++++++++++++++++++++++ lib/kcore/regexp.h | 41 +++++++++++++++++ 2 files changed, 163 insertions(+), 0 deletions(-) diff --git a/lib/kcore/regexp.c b/lib/kcore/regexp.c new file mode 100644 index 0000000..da724ca --- /dev/null +++ b/lib/kcore/regexp.c @@ -0,0 +1,122 @@ +/* + * $Id$ + * + * Regular expression functions + * + * Copyright (C) 2003 Juha Heinanen + * + * This file is part of Kamailio, a free SIP server. + * + * Kamailio is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version + * + * Kamailio is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +/*! + * \file + * \brief Regular Expression functions + */ + +#include <sys/types.h> +#include <string.h> +#include <regex.h> +#include <ctype.h> +#include "regexp.h" +#include "dprint.h" + +/*! \brief Replace in replacement tokens \\d with substrings of string pointed by + * pmatch. + */ +int replace(regmatch_t* pmatch, char* string, char* replacement, str* result) +{ + int len, i, j, digit, size; + + len = strlen(replacement); + j = 0; + + for (i = 0; i < len; i++) { + if (replacement[i] == '\\') { + if (i < len - 1) { + if (isdigit((unsigned char)replacement[i+1])) { + digit = replacement[i+1] - '0'; + if (pmatch[digit].rm_so != -1) { + size = pmatch[digit].rm_eo - pmatch[digit].rm_so; + if (j + size < result->len) { + memcpy(&(result->s[j]), string+pmatch[digit].rm_so, size); + j = j + size; + } else { + return -1; + } + } else { + return -2; + } + i = i + 1; + continue; + } else { + i = i + 1; + } + } else { + return -3; + } + } + if (j + 1 < result->len) { + result->s[j] = replacement[i]; + j = j + 1; + } else { + return -4; + } + } + result->len = j; + return 1; +} + + +/*! \brief Match pattern against string and store result in pmatch */ +int reg_match(char *pattern, char *string, regmatch_t *pmatch) +{ + regex_t preg; + + if (regcomp(&preg, pattern, REG_EXTENDED | REG_NEWLINE)) { + return -1; + } + if (preg.re_nsub > MAX_MATCH) { + regfree(&preg); + return -2; + } + if (regexec(&preg, string, MAX_MATCH, pmatch, 0)) { + regfree(&preg); + return -3; + } + regfree(&preg); + return 0; +} + + +/*! \brief Match pattern against string and, if match succeeds, and replace string + * with replacement substituting tokens \\d with matched substrings. + */ +int reg_replace(char *pattern, char *replacement, char *string, str *result) +{ + regmatch_t pmatch[MAX_MATCH]; + + LM_DBG("pattern: '%s', replacement: '%s', string: '%s'\n", + pattern, replacement, string); + + if (reg_match(pattern, string, &(pmatch[0]))) { + return -1; + } + + return replace(&pmatch[0], string, replacement, result); + +} diff --git a/lib/kcore/regexp.h b/lib/kcore/regexp.h new file mode 100644 index 0000000..e63ed60 --- /dev/null +++ b/lib/kcore/regexp.h @@ -0,0 +1,41 @@ +/* + * $Id$ + * + * Regular expression definitions + * + * Copyright (C) 2003 Juha Heinanen + * + * This file is part of Kamailio, a free SIP server. + * + * Kamailio is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version + * + * Kamailio is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +/*! + * \file + * \brief Regular expression definitions + */ + + +#ifndef REGEXP_H +#define REGEXP_H + +#include "str.h" + +#define MAX_MATCH 6 + +extern int reg_replace(char *pattern, char *replacement, char *string, str *result); + +#endif