blob: 9dbc49ef9da443c916ad4a29da2b4f2ddea25a65 (
plain)
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
|
/*
* Copyright 2006 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkBuffer.h"
#include "SkMalloc.h"
#include <string.h>
///////////////////////////////////////////////////////////////////////////////////////////////////
const void* SkRBuffer::skip(size_t size) {
if (fValid && size <= this->available()) {
const void* pos = fPos;
fPos += size;
return pos;
}
fValid = false;
return nullptr;
}
bool SkRBuffer::read(void* buffer, size_t size) {
if (const void* src = this->skip(size)) {
sk_careful_memcpy(buffer, src, size);
return true;
}
return false;
}
bool SkRBuffer::skipToAlign4() {
intptr_t pos = reinterpret_cast<intptr_t>(fPos);
size_t n = SkAlign4(pos) - pos;
if (fValid && n <= this->available()) {
fPos += n;
return true;
} else {
fValid = false;
return false;
}
}
///////////////////////////////////////////////////////////////////////////////////////////////////
void* SkWBuffer::skip(size_t size) {
void* result = fPos;
writeNoSizeCheck(nullptr, size);
return fData == nullptr ? nullptr : result;
}
void SkWBuffer::writeNoSizeCheck(const void* buffer, size_t size) {
SkASSERT(fData == nullptr || fStop == nullptr || fPos + size <= fStop);
if (fData && buffer) {
sk_careful_memcpy(fPos, buffer, size);
}
fPos += size;
}
size_t SkWBuffer::padToAlign4() {
size_t pos = this->pos();
size_t n = SkAlign4(pos) - pos;
if (n && fData)
{
char* p = fPos;
char* stop = p + n;
do {
*p++ = 0;
} while (p < stop);
}
fPos += n;
return n;
}
#if 0
#ifdef SK_DEBUG
static void AssertBuffer32(const void* buffer)
{
SkASSERT(buffer);
SkASSERT(((size_t)buffer & 3) == 0);
}
#else
#define AssertBuffer32(buffer)
#endif
#endif
|
