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

[Jan Janak]

Module: sip-router
Branch: janakj/kcore
Commit: 301e4abff0ac546969eaa6b26b97574883fcba08
URL:    http://git.sip-router.org/cgi-bin/gitweb.cgi/sip-router/?a=commit;h=301e4abff0ac546969eaa6b26b97574883fcba08

Author: Jan Janak <jan at iptel.org>
Committer: Jan Janak <jan at iptel.org>
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