1: /*
2: +----------------------------------------------------------------------+
3: | PHP Version 5 |
4: +----------------------------------------------------------------------+
5: | Copyright (c) 1997-2014 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: /* $Id: versioning.c,v 1.1.1.4 2014/06/15 20:03:57 misho Exp $ */
20:
21: #include <stdio.h>
22: #include <sys/types.h>
23: #include <ctype.h>
24: #include <stdlib.h>
25: #include <string.h>
26: #include "php.h"
27: #include "php_versioning.h"
28:
29: #define sign(n) ((n)<0?-1:((n)>0?1:0))
30:
31: /* {{{ php_canonicalize_version() */
32:
33: PHPAPI char *
34: php_canonicalize_version(const char *version)
35: {
36: int len = strlen(version);
37: char *buf = safe_emalloc(len, 2, 1), *q, lp, lq;
38: const char *p;
39:
40: if (len == 0) {
41: *buf = '\0';
42: return buf;
43: }
44:
45: p = version;
46: q = buf;
47: *q++ = lp = *p++;
48:
49: while (*p) {
50: /* s/[-_+]/./g;
51: * s/([^\d\.])([^\D\.])/$1.$2/g;
52: * s/([^\D\.])([^\d\.])/$1.$2/g;
53: */
54: #define isdig(x) (isdigit(x)&&(x)!='.')
55: #define isndig(x) (!isdigit(x)&&(x)!='.')
56: #define isspecialver(x) ((x)=='-'||(x)=='_'||(x)=='+')
57:
58: lq = *(q - 1);
59: if (isspecialver(*p)) {
60: if (lq != '.') {
61: *q++ = '.';
62: }
63: } else if ((isndig(lp) && isdig(*p)) || (isdig(lp) && isndig(*p))) {
64: if (lq != '.') {
65: *q++ = '.';
66: }
67: *q++ = *p;
68: } else if (!isalnum(*p)) {
69: if (lq != '.') {
70: *q++ = '.';
71: }
72: } else {
73: *q++ = *p;
74: }
75: lp = *p++;
76: }
77: *q++ = '\0';
78: return buf;
79: }
80:
81: /* }}} */
82: /* {{{ compare_special_version_forms() */
83:
84: typedef struct {
85: const char *name;
86: int order;
87: } special_forms_t;
88:
89: static int
90: compare_special_version_forms(char *form1, char *form2)
91: {
92: int found1 = -1, found2 = -1;
93: special_forms_t special_forms[11] = {
94: {"dev", 0},
95: {"alpha", 1},
96: {"a", 1},
97: {"beta", 2},
98: {"b", 2},
99: {"RC", 3},
100: {"rc", 3},
101: {"#", 4},
102: {"pl", 5},
103: {"p", 5},
104: {NULL, 0},
105: };
106: special_forms_t *pp;
107:
108: for (pp = special_forms; pp && pp->name; pp++) {
109: if (strncmp(form1, pp->name, strlen(pp->name)) == 0) {
110: found1 = pp->order;
111: break;
112: }
113: }
114: for (pp = special_forms; pp && pp->name; pp++) {
115: if (strncmp(form2, pp->name, strlen(pp->name)) == 0) {
116: found2 = pp->order;
117: break;
118: }
119: }
120: return sign(found1 - found2);
121: }
122:
123: /* }}} */
124: /* {{{ php_version_compare() */
125:
126: PHPAPI int
127: php_version_compare(const char *orig_ver1, const char *orig_ver2)
128: {
129: char *ver1;
130: char *ver2;
131: char *p1, *p2, *n1, *n2;
132: long l1, l2;
133: int compare = 0;
134:
135: if (!*orig_ver1 || !*orig_ver2) {
136: if (!*orig_ver1 && !*orig_ver2) {
137: return 0;
138: } else {
139: return *orig_ver1 ? 1 : -1;
140: }
141: }
142: if (orig_ver1[0] == '#') {
143: ver1 = estrdup(orig_ver1);
144: } else {
145: ver1 = php_canonicalize_version(orig_ver1);
146: }
147: if (orig_ver2[0] == '#') {
148: ver2 = estrdup(orig_ver2);
149: } else {
150: ver2 = php_canonicalize_version(orig_ver2);
151: }
152: p1 = n1 = ver1;
153: p2 = n2 = ver2;
154: while (*p1 && *p2 && n1 && n2) {
155: if ((n1 = strchr(p1, '.')) != NULL) {
156: *n1 = '\0';
157: }
158: if ((n2 = strchr(p2, '.')) != NULL) {
159: *n2 = '\0';
160: }
161: if (isdigit(*p1) && isdigit(*p2)) {
162: /* compare element numerically */
163: l1 = strtol(p1, NULL, 10);
164: l2 = strtol(p2, NULL, 10);
165: compare = sign(l1 - l2);
166: } else if (!isdigit(*p1) && !isdigit(*p2)) {
167: /* compare element names */
168: compare = compare_special_version_forms(p1, p2);
169: } else {
170: /* mix of names and numbers */
171: if (isdigit(*p1)) {
172: compare = compare_special_version_forms("#N#", p2);
173: } else {
174: compare = compare_special_version_forms(p1, "#N#");
175: }
176: }
177: if (compare != 0) {
178: break;
179: }
180: if (n1 != NULL) {
181: p1 = n1 + 1;
182: }
183: if (n2 != NULL) {
184: p2 = n2 + 1;
185: }
186: }
187: if (compare == 0) {
188: if (n1 != NULL) {
189: if (isdigit(*p1)) {
190: compare = 1;
191: } else {
192: compare = php_version_compare(p1, "#N#");
193: }
194: } else if (n2 != NULL) {
195: if (isdigit(*p2)) {
196: compare = -1;
197: } else {
198: compare = php_version_compare("#N#", p2);
199: }
200: }
201: }
202: efree(ver1);
203: efree(ver2);
204: return compare;
205: }
206:
207: /* }}} */
208: /* {{{ proto int version_compare(string ver1, string ver2 [, string oper])
209: Compares two "PHP-standardized" version number strings */
210:
211: PHP_FUNCTION(version_compare)
212: {
213: char *v1, *v2, *op = NULL;
214: int v1_len, v2_len, op_len = 0;
215: int compare, argc;
216:
217: argc = ZEND_NUM_ARGS();
218: if (zend_parse_parameters(argc TSRMLS_CC, "ss|s", &v1, &v1_len, &v2,
219: &v2_len, &op, &op_len) == FAILURE) {
220: return;
221: }
222: compare = php_version_compare(v1, v2);
223: if (argc == 2) {
224: RETURN_LONG(compare);
225: }
226: if (!strncmp(op, "<", op_len) || !strncmp(op, "lt", op_len)) {
227: RETURN_BOOL(compare == -1);
228: }
229: if (!strncmp(op, "<=", op_len) || !strncmp(op, "le", op_len)) {
230: RETURN_BOOL(compare != 1);
231: }
232: if (!strncmp(op, ">", op_len) || !strncmp(op, "gt", op_len)) {
233: RETURN_BOOL(compare == 1);
234: }
235: if (!strncmp(op, ">=", op_len) || !strncmp(op, "ge", op_len)) {
236: RETURN_BOOL(compare != -1);
237: }
238: if (!strncmp(op, "==", op_len) || !strncmp(op, "=", op_len) || !strncmp(op, "eq", op_len)) {
239: RETURN_BOOL(compare == 0);
240: }
241: if (!strncmp(op, "!=", op_len) || !strncmp(op, "<>", op_len) || !strncmp(op, "ne", op_len)) {
242: RETURN_BOOL(compare != 0);
243: }
244: RETURN_NULL();
245: }
246:
247: /* }}} */
248:
249: /*
250: * Local variables:
251: * tab-width: 4
252: * c-basic-offset: 4
253: * indent-tabs-mode: t
254: * End:
255: */
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