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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 "base/big_endian.h" | |
| 6 | |
| 7 #include "base/strings/string_piece.h" | |
| 8 | |
| 9 namespace base { | |
| 10 | |
| 11 BigEndianReader::BigEndianReader(const char* buf, size_t len) | |
| 12 : ptr_(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 bool BigEndianReader::ReadU64(uint64* value) { | |
| 59 return Read(value); | |
| 60 } | |
| 61 | |
| 62 BigEndianWriter::BigEndianWriter(char* buf, size_t len) | |
| 63 : ptr_(buf), end_(ptr_ + len) {} | |
| 64 | |
| 65 bool BigEndianWriter::Skip(size_t len) { | |
| 66 if (ptr_ + len > end_) | |
| 67 return false; | |
| 68 ptr_ += len; | |
| 69 return true; | |
| 70 } | |
| 71 | |
| 72 bool BigEndianWriter::WriteBytes(const void* buf, size_t len) { | |
| 73 if (ptr_ + len > end_) | |
| 74 return false; | |
| 75 memcpy(ptr_, buf, len); | |
| 76 ptr_ += len; | |
| 77 return true; | |
| 78 } | |
| 79 | |
| 80 template<typename T> | |
| 81 bool BigEndianWriter::Write(T value) { | |
| 82 if (ptr_ + sizeof(T) > end_) | |
| 83 return false; | |
| 84 WriteBigEndian<T>(ptr_, value); | |
| 85 ptr_ += sizeof(T); | |
| 86 return true; | |
| 87 } | |
| 88 | |
| 89 bool BigEndianWriter::WriteU8(uint8 value) { | |
| 90 return Write(value); | |
| 91 } | |
| 92 | |
| 93 bool BigEndianWriter::WriteU16(uint16 value) { | |
| 94 return Write(value); | |
| 95 } | |
| 96 | |
| 97 bool BigEndianWriter::WriteU32(uint32 value) { | |
| 98 return Write(value); | |
| 99 } | |
| 100 | |
| 101 bool BigEndianWriter::WriteU64(uint64 value) { | |
| 102 return Write(value); | |
| 103 } | |
| 104 | |
| 105 } // namespace base | |
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