--- /dev/null
+/*
+ +----------------------------------------------------------------------+
+ | PHP version 4.0 |
+ +----------------------------------------------------------------------+
+ | Copyright (c) 1997-2001 The PHP Group |
+ +----------------------------------------------------------------------+
+ | This source file is subject to version 2.02 of the PHP license, |
+ | that is bundled with this package in the file LICENSE, and is |
+ | available at through the world-wide-web at |
+ | http://www.php.net/license/2_02.txt. |
+ | If you did not receive a copy of the PHP license and are unable to |
+ | obtain it through the world-wide-web, please send a note to |
+ | license@php.net so we can mail you a copy immediately. |
+ +----------------------------------------------------------------------+
+ | Authors: Stig Sæther Bakken <ssb@fast.no> |
+ | |
+ +----------------------------------------------------------------------+
+*/
+
+/* $Id$ */
+
+#ifndef PHP_VERSIONING_H
+#define PHP_VERSIONING_H
+
+#include "ext/standard/basic_functions.h"
+
+PHPAPI char *php_canonicalize_version(const char *);
+PHPAPI int php_version_compare(const char *, const char *);
+PHP_FUNCTION(version_compare);
+
+#endif
--- /dev/null
+/*
+ +----------------------------------------------------------------------+
+ | PHP version 4.0 |
+ +----------------------------------------------------------------------+
+ | Copyright (c) 1997, 1998, 1999, 2000, 2001 The PHP Group |
+ +----------------------------------------------------------------------+
+ | This source file is subject to version 2.02 of the PHP license, |
+ | that is bundled with this package in the file LICENSE, and is |
+ | available at through the world-wide-web at |
+ | http://www.php.net/license/2_02.txt. |
+ | If you did not receive a copy of the PHP license and are unable to |
+ | obtain it through the world-wide-web, please send a note to |
+ | license@php.net so we can mail you a copy immediately. |
+ +----------------------------------------------------------------------+
+ | Authors: Stig Sæther Bakken <ssb@fast.no> |
+ | |
+ +----------------------------------------------------------------------+
+ */
+
+/* $Id$ */
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include "php.h"
+#include "php_versioning.h"
+
+PHPAPI char *
+php_canonicalize_version(const char *version)
+{
+ int len = strlen(version), in_number = 0;
+ char *buf = emalloc(len * 2 + 1), *q, lp, lq;
+ const char *p;
+
+ if (len == 0) {
+ *buf = '\0';
+ return buf;
+ }
+
+ p = version;
+ q = buf;
+ *q++ = lp = *p++;
+ lq = '\0';
+ while (*p) {
+/* s/[-_+]/./g;
+ * s/([^\d\.])([^\D\.])/$1.$2/g;
+ * s/([^\D\.])([^\d\.])/$1.$2/g;
+ */
+#define isdigdot(x) (isdigit(x)||(x)=='.')
+#define isspecialver(x) ((x)=='-'||(x)=='_'||(x)=='+')
+
+ lq = *(q - 1);
+ if ((isdigdot(*p) != isdigdot(lp) || isspecialver(*p)) &&
+ (lq != '.' && *p != '.')) {
+ lq = *q;
+ *q++ = '.';
+ }
+ *q++ = lp = *p++;
+ }
+ *q++ = '\0';
+ return buf;
+}
+
+static int
+compare_special_version_forms(const char *form1, const char *form2)
+{
+ int i, found1 = -1, found2 = -1;
+ char **pp;
+ static char *special_forms[] = {
+ "dev",
+ "a",
+ "b",
+ "RC",
+ "#N#",
+ "pl",
+ NULL
+ };
+
+ for (pp = special_forms, i = 0; *pp != NULL; pp++, i++) {
+ if (strcmp(form1, *pp) == 0) {
+ found1 = i;
+ break;
+ }
+ }
+ for (pp = special_forms, i = 0; *pp != NULL; pp++, i++) {
+ if (strcmp(form2, *pp) == 0) {
+ found2 = i;
+ break;
+ }
+ }
+ return abs(found1 - found2);
+}
+
+PHPAPI int
+php_version_compare(const char *orig_ver1, const char *orig_ver2)
+{
+ char *ver1 = php_canonicalize_version(orig_ver1);
+ char *ver2 = php_canonicalize_version(orig_ver2);
+ char *p1, *p2, *n1, *n2;
+ long l1, l2;
+ int compare = 0;
+
+ p1 = n1 = ver1;
+ p2 = n2 = ver2;
+ while (*p1 && *p2 && n1 && n2) {
+ if ((n1 = strchr(p1, '.')) != NULL) {
+ *n1 = '\0';
+ }
+ if ((n2 = strchr(p2, '.')) != NULL) {
+ *n2 = '\0';
+ }
+ if (isdigit(*p1) && isdigit(*p2)) {
+ /* compare element numerically */
+ l1 = strtol(p1, NULL, 10);
+ l2 = strtol(p2, NULL, 10);
+ compare = abs(l1 - l2);
+ } else if (!isdigit(*p1) && !isdigit(*p2)) {
+ /* compare element names */
+ compare = compare_special_version_forms(p1, p2);
+ } else {
+ /* mix of names and numbers */
+ if (isdigit(*p1)) {
+ compare = compare_special_version_forms("#N#", p2);
+ } else {
+ compare = compare_special_version_forms(p1, "#N#");
+ }
+ }
+ if (compare != 0) {
+ break;
+ }
+ if (n1 != NULL) {
+ p1 = n1 + 1;
+ }
+ if (n2 != NULL) {
+ p2 = n2 + 1;
+ }
+ }
+ if (compare == 0) {
+ if (n1 != NULL) {
+ if (isdigit(*n1)) {
+ compare = 1;
+ } else {
+ compare = compare_special_version_forms(n1, "#N#");
+ }
+ } else if (n2 != NULL) {
+ if (isdigit(*n2)) {
+ compare = -1;
+ } else {
+ compare = compare_special_version_forms("#N", n2);
+ }
+ }
+ }
+ efree(ver1);
+ efree(ver2);
+ return compare;
+}
+
+/* {{{ proto int version_compare(string ver1, string ver2) */
+
+PHP_FUNCTION(version_compare)
+{
+ zval **v1, **v2;
+
+ if (ZEND_NUM_ARGS() != 2 || zend_get_parameters_ex(2, &v1, &v2) == FAILURE) {
+ WRONG_PARAM_COUNT;
+ }
+ convert_to_string_ex(v1);
+ convert_to_string_ex(v2);
+ RETURN_LONG(php_version_compare(Z_STRVAL_PP(v1), Z_STRVAL_PP(v2)));
+}
+
+/* }}} */
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * indent-tabs-mode: t
+ * End:
+ */
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