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Diffstat (limited to 'ext/standard/versioning.c')
| -rw-r--r-- | ext/standard/versioning.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/ext/standard/versioning.c b/ext/standard/versioning.c new file mode 100644 index 0000000000..6d56e760ea --- /dev/null +++ b/ext/standard/versioning.c @@ -0,0 +1,181 @@ +/* + +----------------------------------------------------------------------+ + | 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: + */ |