1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 7 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2016 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: Dmitry Stogov <dmitry@zend.com> |
16 +----------------------------------------------------------------------+
17 */
18
19 #include <zend.h>
20 #include "zend_smart_str_public.h"
21
22 #define SMART_STR_OVERHEAD (ZEND_MM_OVERHEAD + _ZSTR_HEADER_SIZE)
23
24 #ifndef SMART_STR_PAGE
25 # define SMART_STR_PAGE 4096
26 #endif
27
28 #ifndef SMART_STR_START_SIZE
29 # define SMART_STR_START_SIZE (256 - SMART_STR_OVERHEAD - 1)
30 #endif
31
32 #define SMART_STR_NEW_SIZE(len) \
33 (((len + SMART_STR_OVERHEAD + SMART_STR_PAGE) & ~(SMART_STR_PAGE - 1)) - SMART_STR_OVERHEAD - 1)
34
35 ZEND_API void ZEND_FASTCALL smart_str_erealloc(smart_str *str, size_t len)
36 {
37 if (UNEXPECTED(!str->s)) {
38 str->a = len < SMART_STR_START_SIZE
39 ? SMART_STR_START_SIZE
40 : SMART_STR_NEW_SIZE(len);
41 str->s = zend_string_alloc(str->a, 0);
42 ZSTR_LEN(str->s) = 0;
43 } else {
44 str->a = SMART_STR_NEW_SIZE(len);
45 str->s = (zend_string *) erealloc2(str->s, _ZSTR_HEADER_SIZE + str->a + 1, _ZSTR_HEADER_SIZE + ZSTR_LEN(str->s) + 1);
46 }
47 }
48
49 ZEND_API void ZEND_FASTCALL smart_str_realloc(smart_str *str, size_t len)
50 {
51 if (UNEXPECTED(!str->s)) {
52 str->a = len < SMART_STR_START_SIZE
53 ? SMART_STR_START_SIZE
54 : SMART_STR_NEW_SIZE(len);
55 str->s = zend_string_alloc(str->a, 1);
56 ZSTR_LEN(str->s) = 0;
57 } else {
58 str->a = SMART_STR_NEW_SIZE(len);
59 str->s = (zend_string *) realloc(str->s, _ZSTR_HEADER_SIZE + str->a + 1);
60 }
61 }