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
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Handles a buffer that can be allocated and freed
*
* Copyright 2021 Google LLC
* Written by Simon Glass <sjg@chromium.org>
*/
#ifndef USE_HOSTCC
#include <malloc.h>
#include <mapmem.h>
#include <string.h>
#endif
#include <abuf.h>
void abuf_set(struct abuf *abuf, void *data, size_t size)
{
abuf_uninit(abuf);
abuf->data = data;
abuf->size = size;
}
#ifndef USE_HOSTCC
void abuf_map_sysmem(struct abuf *abuf, ulong addr, size_t size)
{
abuf_set(abuf, map_sysmem(addr, size), size);
}
#else
/* copied from lib/string.c for convenience */
static char *memdup(const void *src, size_t len)
{
char *p;
p = malloc(len);
if (!p)
return NULL;
memcpy(p, src, len);
return p;
}
#endif
bool abuf_realloc(struct abuf *abuf, size_t new_size)
{
void *ptr;
if (!new_size) {
/* easy case, just need to uninit, freeing any allocation */
abuf_uninit(abuf);
return true;
} else if (abuf->alloced) {
/* currently allocated, so need to reallocate */
ptr = realloc(abuf->data, new_size);
if (!ptr)
return false;
abuf->data = ptr;
abuf->size = new_size;
return true;
} else if (new_size <= abuf->size) {
/*
* not currently alloced and new size is no larger. Just update
* it. Data is lost off the end if new_size < abuf->size
*/
abuf->size = new_size;
return true;
} else {
/* not currently allocated and new size is larger. Alloc and
* copy in data. The new space is not inited.
*/
ptr = malloc(new_size);
if (!ptr)
return false;
if (abuf->size)
memcpy(ptr, abuf->data, abuf->size);
abuf->data = ptr;
abuf->size = new_size;
abuf->alloced = true;
return true;
}
}
bool abuf_realloc_inc(struct abuf *abuf, size_t inc)
{
return abuf_realloc(abuf, abuf->size + inc);
}
void *abuf_uninit_move(struct abuf *abuf, size_t *sizep)
{
void *ptr;
if (sizep)
*sizep = abuf->size;
if (!abuf->size)
return NULL;
if (abuf->alloced) {
ptr = abuf->data;
} else {
ptr = memdup(abuf->data, abuf->size);
if (!ptr)
return NULL;
}
/* Clear everything out so there is no record of the data */
abuf_init(abuf);
return ptr;
}
void abuf_init_set(struct abuf *abuf, void *data, size_t size)
{
abuf_init(abuf);
abuf_set(abuf, data, size);
}
void abuf_init_move(struct abuf *abuf, void *data, size_t size)
{
abuf_init_set(abuf, data, size);
abuf->alloced = true;
}
void abuf_uninit(struct abuf *abuf)
{
if (abuf->alloced)
free(abuf->data);
abuf_init(abuf);
}
void abuf_init(struct abuf *abuf)
{
abuf->data = NULL;
abuf->size = 0;
abuf->alloced = false;
}
|
