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1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #include "config.h"
6 #include "wtf/ArrayPiece.h"
7 
8 #include "wtf/ArrayBuffer.h"
9 #include "wtf/ArrayBufferView.h"
10 #include "wtf/Assertions.h"
11 
12 namespace WTF {
13 
ArrayPiece()14 ArrayPiece::ArrayPiece()
15 {
16     initNull();
17 }
18 
ArrayPiece(void * data,unsigned byteLength)19 ArrayPiece::ArrayPiece(void* data, unsigned byteLength)
20 {
21     initWithData(data, byteLength);
22 }
23 
ArrayPiece(ArrayBuffer * buffer)24 ArrayPiece::ArrayPiece(ArrayBuffer* buffer)
25 {
26     if (buffer) {
27         initWithData(buffer->data(), buffer->byteLength());
28     } else {
29         initNull();
30     }
31 }
32 
ArrayPiece(ArrayBufferView * buffer)33 ArrayPiece::ArrayPiece(ArrayBufferView* buffer)
34 {
35     if (buffer) {
36         initWithData(buffer->baseAddress(), buffer->byteLength());
37     } else {
38         initNull();
39     }
40 }
41 
isNull() const42 bool ArrayPiece::isNull() const
43 {
44     return m_isNull;
45 }
46 
data() const47 void* ArrayPiece::data() const
48 {
49     ASSERT(!isNull());
50     return m_data;
51 }
52 
bytes() const53 unsigned char* ArrayPiece::bytes() const
54 {
55     return static_cast<unsigned char*>(data());
56 }
57 
byteLength() const58 unsigned ArrayPiece::byteLength() const
59 {
60     ASSERT(!isNull());
61     return m_byteLength;
62 }
63 
initWithData(void * data,unsigned byteLength)64 void ArrayPiece::initWithData(void* data, unsigned byteLength)
65 {
66     m_byteLength = byteLength;
67     m_data = data;
68     m_isNull = false;
69 }
70 
initNull()71 void ArrayPiece::initNull()
72 {
73     m_byteLength = 0;
74     m_data = 0;
75     m_isNull = true;
76 }
77 
78 } // namespace WTF
79