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1 // Copyright (c) 2011 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 "net/base/big_endian.h" | |
6 | |
7 #include "base/string_piece.h" | |
8 | |
9 namespace net { | |
10 | |
11 BigEndianReader::BigEndianReader(const void* buf, size_t len) | |
12 : ptr_(reinterpret_cast<const char*>(buf)), end_(ptr_ + len) {} | |
13 | |
14 bool BigEndianReader::Skip(size_t len) { | |
15 if (ptr_ + len > end_) | |
16 return false; | |
17 ptr_ += len; | |
18 return true; | |
19 } | |
20 | |
21 bool BigEndianReader::ReadBytes(void* out, size_t len) { | |
22 if (ptr_ + len > end_) | |
23 return false; | |
24 memcpy(out, ptr_, len); | |
25 ptr_ += len; | |
26 return true; | |
27 } | |
28 | |
29 bool BigEndianReader::ReadPiece(base::StringPiece* out, size_t len) { | |
30 if (ptr_ + len > end_) | |
31 return false; | |
32 *out = base::StringPiece(ptr_, len); | |
33 ptr_ += len; | |
34 return true; | |
35 } | |
36 | |
37 template<typename T> | |
38 bool BigEndianReader::Read(T* value) { | |
39 if (ptr_ + sizeof(T) > end_) | |
40 return false; | |
41 ReadBigEndian<T>(ptr_, value); | |
42 ptr_ += sizeof(T); | |
43 return true; | |
44 } | |
45 | |
46 bool BigEndianReader::ReadU8(uint8* value) { | |
47 return Read(value); | |
48 } | |
49 | |
50 bool BigEndianReader::ReadU16(uint16* value) { | |
51 return Read(value); | |
52 } | |
53 | |
54 bool BigEndianReader::ReadU32(uint32* value) { | |
55 return Read(value); | |
56 } | |
57 | |
58 BigEndianWriter::BigEndianWriter(void* buf, size_t len) | |
59 : ptr_(reinterpret_cast<char*>(buf)), end_(ptr_ + len) {} | |
60 | |
61 bool BigEndianWriter::Skip(size_t len) { | |
62 if (ptr_ + len > end_) | |
63 return false; | |
64 ptr_ += len; | |
65 return true; | |
66 } | |
67 | |
68 bool BigEndianWriter::WriteBytes(const void* buf, size_t len) { | |
69 if (ptr_ + len > end_) | |
70 return false; | |
71 memcpy(ptr_, buf, len); | |
72 ptr_ += len; | |
73 return true; | |
74 } | |
75 | |
76 template<typename T> | |
77 bool BigEndianWriter::Write(T value) { | |
78 if (ptr_ + sizeof(T) > end_) | |
79 return false; | |
80 WriteBigEndian<T>(ptr_, value); | |
81 ptr_ += sizeof(T); | |
82 return true; | |
83 } | |
84 | |
85 bool BigEndianWriter::WriteU8(uint8 value) { | |
86 return Write(value); | |
87 } | |
88 | |
89 bool BigEndianWriter::WriteU16(uint16 value) { | |
90 return Write(value); | |
91 } | |
92 | |
93 bool BigEndianWriter::WriteU32(uint32 value) { | |
94 return Write(value); | |
95 } | |
96 | |
97 } // namespace net | |
98 | |
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