1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 7 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) The PHP Group |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 3.01 of the PHP license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.php.net/license/3_01.txt |
11 | If you did not receive a copy of the PHP license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@php.net so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Author: Stig Sæther Bakken <ssb@php.net> |
16 +----------------------------------------------------------------------+
17 */
18
19 #include <stdio.h>
20 #include <sys/types.h>
21 #include <ctype.h>
22 #include <stdlib.h>
23 #include <string.h>
24 #include "php.h"
25 #include "php_versioning.h"
26
27 /* {{{ php_canonicalize_version() */
28
29 PHPAPI char *
php_canonicalize_version(const char * version)30 php_canonicalize_version(const char *version)
31 {
32 size_t len = strlen(version);
33 char *buf = safe_emalloc(len, 2, 1), *q, lp, lq;
34 const char *p;
35
36 if (len == 0) {
37 *buf = '\0';
38 return buf;
39 }
40
41 p = version;
42 q = buf;
43 *q++ = lp = *p++;
44
45 while (*p) {
46 /* s/[-_+]/./g;
47 * s/([^\d\.])([^\D\.])/$1.$2/g;
48 * s/([^\D\.])([^\d\.])/$1.$2/g;
49 */
50 #define isdig(x) (isdigit(x)&&(x)!='.')
51 #define isndig(x) (!isdigit(x)&&(x)!='.')
52 #define isspecialver(x) ((x)=='-'||(x)=='_'||(x)=='+')
53
54 lq = *(q - 1);
55 if (isspecialver(*p)) {
56 if (lq != '.') {
57 *q++ = '.';
58 }
59 } else if ((isndig(lp) && isdig(*p)) || (isdig(lp) && isndig(*p))) {
60 if (lq != '.') {
61 *q++ = '.';
62 }
63 *q++ = *p;
64 } else if (!isalnum(*p)) {
65 if (lq != '.') {
66 *q++ = '.';
67 }
68 } else {
69 *q++ = *p;
70 }
71 lp = *p++;
72 }
73 *q++ = '\0';
74 return buf;
75 }
76
77 /* }}} */
78 /* {{{ compare_special_version_forms() */
79
80 typedef struct {
81 const char *name;
82 int order;
83 } special_forms_t;
84
85 static int
compare_special_version_forms(char * form1,char * form2)86 compare_special_version_forms(char *form1, char *form2)
87 {
88 int found1 = -1, found2 = -1;
89 special_forms_t special_forms[11] = {
90 {"dev", 0},
91 {"alpha", 1},
92 {"a", 1},
93 {"beta", 2},
94 {"b", 2},
95 {"RC", 3},
96 {"rc", 3},
97 {"#", 4},
98 {"pl", 5},
99 {"p", 5},
100 {NULL, 0},
101 };
102 special_forms_t *pp;
103
104 for (pp = special_forms; pp && pp->name; pp++) {
105 if (strncmp(form1, pp->name, strlen(pp->name)) == 0) {
106 found1 = pp->order;
107 break;
108 }
109 }
110 for (pp = special_forms; pp && pp->name; pp++) {
111 if (strncmp(form2, pp->name, strlen(pp->name)) == 0) {
112 found2 = pp->order;
113 break;
114 }
115 }
116 return ZEND_NORMALIZE_BOOL(found1 - found2);
117 }
118
119 /* }}} */
120 /* {{{ php_version_compare() */
121
122 PHPAPI int
php_version_compare(const char * orig_ver1,const char * orig_ver2)123 php_version_compare(const char *orig_ver1, const char *orig_ver2)
124 {
125 char *ver1;
126 char *ver2;
127 char *p1, *p2, *n1, *n2;
128 long l1, l2;
129 int compare = 0;
130
131 if (!*orig_ver1 || !*orig_ver2) {
132 if (!*orig_ver1 && !*orig_ver2) {
133 return 0;
134 } else {
135 return *orig_ver1 ? 1 : -1;
136 }
137 }
138 if (orig_ver1[0] == '#') {
139 ver1 = estrdup(orig_ver1);
140 } else {
141 ver1 = php_canonicalize_version(orig_ver1);
142 }
143 if (orig_ver2[0] == '#') {
144 ver2 = estrdup(orig_ver2);
145 } else {
146 ver2 = php_canonicalize_version(orig_ver2);
147 }
148 p1 = n1 = ver1;
149 p2 = n2 = ver2;
150 while (*p1 && *p2 && n1 && n2) {
151 if ((n1 = strchr(p1, '.')) != NULL) {
152 *n1 = '\0';
153 }
154 if ((n2 = strchr(p2, '.')) != NULL) {
155 *n2 = '\0';
156 }
157 if (isdigit(*p1) && isdigit(*p2)) {
158 /* compare element numerically */
159 l1 = strtol(p1, NULL, 10);
160 l2 = strtol(p2, NULL, 10);
161 compare = ZEND_NORMALIZE_BOOL(l1 - l2);
162 } else if (!isdigit(*p1) && !isdigit(*p2)) {
163 /* compare element names */
164 compare = compare_special_version_forms(p1, p2);
165 } else {
166 /* mix of names and numbers */
167 if (isdigit(*p1)) {
168 compare = compare_special_version_forms("#N#", p2);
169 } else {
170 compare = compare_special_version_forms(p1, "#N#");
171 }
172 }
173 if (compare != 0) {
174 break;
175 }
176 if (n1 != NULL) {
177 p1 = n1 + 1;
178 }
179 if (n2 != NULL) {
180 p2 = n2 + 1;
181 }
182 }
183 if (compare == 0) {
184 if (n1 != NULL) {
185 if (isdigit(*p1)) {
186 compare = 1;
187 } else {
188 compare = php_version_compare(p1, "#N#");
189 }
190 } else if (n2 != NULL) {
191 if (isdigit(*p2)) {
192 compare = -1;
193 } else {
194 compare = php_version_compare("#N#", p2);
195 }
196 }
197 }
198 efree(ver1);
199 efree(ver2);
200 return compare;
201 }
202
203 /* }}} */
204 /* {{{ proto int version_compare(string ver1, string ver2 [, string oper])
205 Compares two "PHP-standardized" version number strings */
206
PHP_FUNCTION(version_compare)207 PHP_FUNCTION(version_compare)
208 {
209 char *v1, *v2, *op = NULL;
210 size_t v1_len, v2_len, op_len = 0;
211 int compare;
212
213 ZEND_PARSE_PARAMETERS_START(2, 3)
214 Z_PARAM_STRING(v1, v1_len)
215 Z_PARAM_STRING(v2, v2_len)
216 Z_PARAM_OPTIONAL
217 Z_PARAM_STRING(op, op_len)
218 ZEND_PARSE_PARAMETERS_END();
219
220 compare = php_version_compare(v1, v2);
221 if (!op) {
222 RETURN_LONG(compare);
223 }
224 if (!strncmp(op, "<", op_len) || !strncmp(op, "lt", op_len)) {
225 RETURN_BOOL(compare == -1);
226 }
227 if (!strncmp(op, "<=", op_len) || !strncmp(op, "le", op_len)) {
228 RETURN_BOOL(compare != 1);
229 }
230 if (!strncmp(op, ">", op_len) || !strncmp(op, "gt", op_len)) {
231 RETURN_BOOL(compare == 1);
232 }
233 if (!strncmp(op, ">=", op_len) || !strncmp(op, "ge", op_len)) {
234 RETURN_BOOL(compare != -1);
235 }
236 if (!strncmp(op, "==", op_len) || !strncmp(op, "=", op_len) || !strncmp(op, "eq", op_len)) {
237 RETURN_BOOL(compare == 0);
238 }
239 if (!strncmp(op, "!=", op_len) || !strncmp(op, "<>", op_len) || !strncmp(op, "ne", op_len)) {
240 RETURN_BOOL(compare != 0);
241 }
242 RETURN_NULL();
243 }
244
245 /* }}} */
246
