1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/*
* libusual - Utility library for C
*
* Copyright (c) 2007-2009 Marko Kreen, Skype Technologies OÜ
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <usual/cxalloc.h>
#include <usual/statlist.h>
#include <string.h>
/*
* Utility routines for cx_* API.
*/
void *cx_alloc(CxMem *cx, size_t len)
{
if (!len)
return NULL;
if (!cx)
cx = USUAL_ALLOC;
return cx->ops->c_alloc(cx->ctx, len);
}
void *cx_realloc(CxMem *cx, void *ptr, size_t len)
{
if (!cx)
cx = USUAL_ALLOC;
if (!ptr)
return cx_alloc(cx, len);
if (!len) {
cx_free(cx, ptr);
return NULL;
}
return cx->ops->c_realloc(cx->ctx, ptr, len);
}
void cx_free(CxMem *cx, void *ptr)
{
if (!cx)
cx = USUAL_ALLOC;
if (ptr)
cx->ops->c_free(cx->ctx, ptr);
}
void cx_destroy(CxMem *cx)
{
if (!cx)
return;
if (!cx->ops->c_destroy)
abort();
cx->ops->c_destroy(cx->ctx);
}
void *cx_alloc0(CxMem *cx, size_t len)
{
void *p = cx_alloc(cx, len);
if (p)
memset(p, 0, len);
return p;
}
void *cx_memdup(CxMem *cx, const void *src, size_t len)
{
void *p = cx_alloc(cx, len);
if (p)
memcpy(p, src, len);
return p;
}
void *cx_strdup(CxMem *cx, const char *s)
{
return cx_memdup(cx, s, strlen(s) + 1);
}
char *cx_sprintf(CxMem *cx, const char *fmt, ...)
{
char *res;
va_list ap;
va_start(ap, fmt);
res = cx_vsprintf(cx, fmt, ap);
va_end(ap);
return res;
}
char *cx_vsprintf(CxMem *cx, const char *fmt, va_list ap)
{
char *res;
cx_vasprintf(cx, &res, fmt, ap);
return res;
}
int cx_asprintf(CxMem *cx, char **dst_p, const char *fmt, ...)
{
int res;
va_list ap;
va_start(ap, fmt);
res = cx_vasprintf(cx, dst_p, fmt, ap);
va_end(ap);
return res;
}
int cx_vasprintf(CxMem *cx, char **dst_p, const char *fmt, va_list ap)
{
char buf[128], *dst;
int res, res2;
*dst_p = NULL;
res = vsnprintf(buf, sizeof buf, fmt, ap);
if (res < 0)
return -1;
dst = cx_alloc(cx, res + 1);
if (!dst)
return -1;
if ((size_t)res < sizeof buf) {
memcpy(dst, buf, res+1);
} else {
res2 = vsnprintf(dst, res+1, fmt, ap);
if (res2 != res) {
cx_free(cx, dst);
return -1;
}
}
*dst_p = dst;
return res;
}
/*
* Base allocator that uses libc routines.
*/
static void *libc_alloc(void *ctx, size_t len)
{
return malloc(len);
}
static void *libc_realloc(void *ctx, void *ptr, size_t len)
{
return realloc(ptr, len);
}
static void libc_free(void *ctx, void *ptr)
{
free(ptr);
}
static const struct CxOps libc_alloc_ops = {
libc_alloc,
libc_realloc,
libc_free,
};
const struct CxMem cx_libc_allocator = {
&libc_alloc_ops,
NULL,
};
|
