1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 5 |
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: Sascha Schumann <sascha@schumann.cx> |
16 +----------------------------------------------------------------------+
17 */
18
19 /* $Id$ */
20
21 #ifndef PHP_SMART_STR_H
22 #define PHP_SMART_STR_H
23
24 #include "php_smart_str_public.h"
25
26 #include <stdlib.h>
27 #ifndef SMART_STR_USE_REALLOC
28 #include <zend.h>
29 #endif
30
31 #define smart_str_0(x) do { \
32 if ((x)->c) { \
33 (x)->c[(x)->len] = '\0'; \
34 } \
35 } while (0)
36
37 #ifndef SMART_STR_PREALLOC
38 #define SMART_STR_PREALLOC 128
39 #endif
40
41 #ifndef SMART_STR_START_SIZE
42 #define SMART_STR_START_SIZE 78
43 #endif
44
45 #ifdef SMART_STR_USE_REALLOC
46 #define SMART_STR_REALLOC(a,b,c) realloc((a),(b))
47 #else
48 #define SMART_STR_REALLOC(a,b,c) perealloc((a),(b),(c))
49 #endif
50
51 #define SMART_STR_DO_REALLOC(d, what) \
52 (d)->c = SMART_STR_REALLOC((d)->c, (d)->a + 1, (what))
53
54 #define smart_str_alloc4(d, n, what, newlen) do { \
55 if (!(d)->c) { \
56 (d)->len = 0; \
57 newlen = (n); \
58 (d)->a = newlen < SMART_STR_START_SIZE \
59 ? SMART_STR_START_SIZE \
60 : (newlen >= (INT_MAX - SMART_STR_PREALLOC)? newlen \
61 : (newlen + SMART_STR_PREALLOC)); \
62 SMART_STR_DO_REALLOC(d, what); \
63 } else { \
64 newlen = (d)->len + (n); \
65 if (newlen >= (d)->a) { \
66 (d)->a = newlen + SMART_STR_PREALLOC; \
67 if (UNEXPECTED((d)->a >= INT_MAX)) { \
68 zend_error(E_ERROR, "String size overflow"); \
69 } \
70 SMART_STR_DO_REALLOC(d, what); \
71 } \
72 } \
73 } while (0)
74
75 #define smart_str_alloc(d, n, what) \
76 smart_str_alloc4((d), (n), (what), newlen)
77
78 /* wrapper */
79
80 #define smart_str_appends_ex(dest, src, what) \
81 smart_str_appendl_ex((dest), (src), strlen(src), (what))
82 #define smart_str_appends(dest, src) \
83 smart_str_appendl((dest), (src), strlen(src))
84
85 #define smart_str_appendc(dest, c) \
86 smart_str_appendc_ex((dest), (c), 0)
87 #define smart_str_free(s) \
88 smart_str_free_ex((s), 0)
89 #define smart_str_appendl(dest, src, len) \
90 smart_str_appendl_ex((dest), (src), (len), 0)
91 #define smart_str_append(dest, src) \
92 smart_str_append_ex((dest), (src), 0)
93 #define smart_str_append_long(dest, val) \
94 smart_str_append_long_ex((dest), (val), 0)
95 #define smart_str_append_off_t(dest, val) \
96 smart_str_append_off_t_ex((dest), (val), 0)
97 #define smart_str_append_unsigned(dest, val) \
98 smart_str_append_unsigned_ex((dest), (val), 0)
99
100 #define smart_str_appendc_ex(dest, ch, what) do { \
101 register size_t __nl; \
102 smart_str_alloc4((dest), 1, (what), __nl); \
103 (dest)->len = __nl; \
104 ((unsigned char *) (dest)->c)[(dest)->len - 1] = (ch); \
105 } while (0)
106
107 #define smart_str_free_ex(s, what) do { \
108 smart_str *__s = (smart_str *) (s); \
109 if (__s->c) { \
110 pefree(__s->c, what); \
111 __s->c = NULL; \
112 } \
113 __s->a = __s->len = 0; \
114 } while (0)
115
116 #define smart_str_appendl_ex(dest, src, nlen, what) do { \
117 register size_t __nl; \
118 smart_str *__dest = (smart_str *) (dest); \
119 \
120 smart_str_alloc4(__dest, (nlen), (what), __nl); \
121 memcpy(__dest->c + __dest->len, (src), (nlen)); \
122 __dest->len = __nl; \
123 } while (0)
124
125 /* input: buf points to the END of the buffer */
126 #define smart_str_print_unsigned4(buf, num, vartype, result) do { \
127 char *__p = (buf); \
128 vartype __num = (num); \
129 *__p = '\0'; \
130 do { \
131 *--__p = (char) (__num % 10) + '0'; \
132 __num /= 10; \
133 } while (__num > 0); \
134 result = __p; \
135 } while (0)
136
137 /* buf points to the END of the buffer */
138 #define smart_str_print_long4(buf, num, vartype, result) do { \
139 if (num < 0) { \
140 /* this might cause problems when dealing with LONG_MIN \
141 and machines which don't support long long. Works \
142 flawlessly on 32bit x86 */ \
143 smart_str_print_unsigned4((buf), -(num), vartype, (result)); \
144 *--(result) = '-'; \
145 } else { \
146 smart_str_print_unsigned4((buf), (num), vartype, (result)); \
147 } \
148 } while (0)
149
150 /*
151 * these could be replaced using a braced-group inside an expression
152 * for GCC compatible compilers, e.g.
153 *
154 * #define f(..) ({char *r;..;__r;})
155 */
156
smart_str_print_long(char * buf,long num)157 static inline char *smart_str_print_long(char *buf, long num) {
158 char *r;
159 smart_str_print_long4(buf, num, unsigned long, r);
160 return r;
161 }
162
smart_str_print_unsigned(char * buf,long num)163 static inline char *smart_str_print_unsigned(char *buf, long num) {
164 char *r;
165 smart_str_print_unsigned4(buf, num, unsigned long, r);
166 return r;
167 }
168
169 #define smart_str_append_generic_ex(dest, num, type, vartype, func) do { \
170 char __b[32]; \
171 char *__t; \
172 smart_str_print##func##4 (__b + sizeof(__b) - 1, (num), vartype, __t); \
173 smart_str_appendl_ex((dest), __t, __b + sizeof(__b) - 1 - __t, (type)); \
174 } while (0)
175
176 #define smart_str_append_unsigned_ex(dest, num, type) \
177 smart_str_append_generic_ex((dest), (num), (type), unsigned long, _unsigned)
178
179 #define smart_str_append_long_ex(dest, num, type) \
180 smart_str_append_generic_ex((dest), (num), (type), unsigned long, _long)
181
182 #define smart_str_append_off_t_ex(dest, num, type) \
183 smart_str_append_generic_ex((dest), (num), (type), off_t, _long)
184
185 #define smart_str_append_ex(dest, src, what) \
186 smart_str_appendl_ex((dest), ((smart_str *)(src))->c, \
187 ((smart_str *)(src))->len, (what));
188
189
190 #define smart_str_setl(dest, src, nlen) do { \
191 (dest)->len = (nlen); \
192 (dest)->a = (nlen) + 1; \
193 (dest)->c = (char *) (src); \
194 } while (0)
195
196 #define smart_str_sets(dest, src) \
197 smart_str_setl((dest), (src), strlen(src));
198
199 #endif
200
