apatrick@chromium.org | 8963ec2 | 2012-07-09 22:34:06 +0000 | [diff] [blame] | 1 | // |
| 2 | // Copyright (c) 2012 The ANGLE Project Authors. All rights reserved. |
| 3 | // Use of this source code is governed by a BSD-style license that can be |
| 4 | // found in the LICENSE file. |
| 5 | // |
| 6 | |
| 7 | // BinaryStream.h: Provides binary serialization of simple types. |
| 8 | |
| 9 | #ifndef LIBGLESV2_BINARYSTREAM_H_ |
| 10 | #define LIBGLESV2_BINARYSTREAM_H_ |
| 11 | |
apatrick@chromium.org | 8963ec2 | 2012-07-09 22:34:06 +0000 | [diff] [blame] | 12 | #include "common/angleutils.h" |
Jamie Madill | 1b2a8f9 | 2014-05-14 13:09:39 -0400 | [diff] [blame] | 13 | #include "common/mathutil.h" |
apatrick@chromium.org | 8963ec2 | 2012-07-09 22:34:06 +0000 | [diff] [blame] | 14 | |
Geoff Lang | 0b7eef7 | 2014-06-12 14:10:47 -0400 | [diff] [blame] | 15 | #include <cstddef> |
| 16 | #include <string> |
| 17 | #include <vector> |
| 18 | |
apatrick@chromium.org | 8963ec2 | 2012-07-09 22:34:06 +0000 | [diff] [blame] | 19 | namespace gl |
| 20 | { |
| 21 | |
| 22 | class BinaryInputStream |
| 23 | { |
| 24 | public: |
| 25 | BinaryInputStream(const void *data, size_t length) |
| 26 | { |
| 27 | mError = false; |
| 28 | mOffset = 0; |
| 29 | mData = static_cast<const char*>(data); |
| 30 | mLength = length; |
| 31 | } |
| 32 | |
Jamie Madill | 1b2a8f9 | 2014-05-14 13:09:39 -0400 | [diff] [blame] | 33 | // readInt will generate an error for bool types |
| 34 | template <class IntT> |
| 35 | IntT readInt() |
apatrick@chromium.org | 8963ec2 | 2012-07-09 22:34:06 +0000 | [diff] [blame] | 36 | { |
Jamie Madill | 1b2a8f9 | 2014-05-14 13:09:39 -0400 | [diff] [blame] | 37 | int value; |
| 38 | read(&value); |
| 39 | return static_cast<IntT>(value); |
apatrick@chromium.org | 8963ec2 | 2012-07-09 22:34:06 +0000 | [diff] [blame] | 40 | } |
| 41 | |
Jamie Madill | 1b2a8f9 | 2014-05-14 13:09:39 -0400 | [diff] [blame] | 42 | template <class IntT> |
| 43 | void readInt(IntT *outValue) |
apatrick@chromium.org | 8963ec2 | 2012-07-09 22:34:06 +0000 | [diff] [blame] | 44 | { |
Jamie Madill | 1b2a8f9 | 2014-05-14 13:09:39 -0400 | [diff] [blame] | 45 | *outValue = readInt<IntT>(); |
apatrick@chromium.org | 8963ec2 | 2012-07-09 22:34:06 +0000 | [diff] [blame] | 46 | } |
| 47 | |
Jamie Madill | 1b2a8f9 | 2014-05-14 13:09:39 -0400 | [diff] [blame] | 48 | bool readBool() |
| 49 | { |
| 50 | int value; |
| 51 | read(&value); |
| 52 | return (value > 0); |
| 53 | } |
| 54 | |
| 55 | void readBool(bool *outValue) |
| 56 | { |
| 57 | *outValue = readBool(); |
| 58 | } |
| 59 | |
| 60 | void readBytes(unsigned char outArray[], size_t count) |
| 61 | { |
| 62 | read<unsigned char>(outArray, count); |
| 63 | } |
| 64 | |
| 65 | std::string readString() |
| 66 | { |
| 67 | std::string outString; |
| 68 | readString(&outString); |
| 69 | return outString; |
| 70 | } |
| 71 | |
| 72 | void readString(std::string *v) |
apatrick@chromium.org | 8963ec2 | 2012-07-09 22:34:06 +0000 | [diff] [blame] | 73 | { |
| 74 | size_t length; |
Jamie Madill | 1b2a8f9 | 2014-05-14 13:09:39 -0400 | [diff] [blame] | 75 | readInt(&length); |
apatrick@chromium.org | 8963ec2 | 2012-07-09 22:34:06 +0000 | [diff] [blame] | 76 | |
| 77 | if (mError) |
| 78 | { |
| 79 | return; |
| 80 | } |
| 81 | |
| 82 | if (mOffset + length > mLength) |
| 83 | { |
| 84 | mError = true; |
| 85 | return; |
| 86 | } |
| 87 | |
| 88 | v->assign(mData + mOffset, length); |
| 89 | mOffset += length; |
| 90 | } |
| 91 | |
apatrick@chromium.org | 60dafe8 | 2012-09-05 22:26:10 +0000 | [diff] [blame] | 92 | void skip(size_t length) |
| 93 | { |
| 94 | if (mOffset + length > mLength) |
| 95 | { |
| 96 | mError = true; |
| 97 | return; |
| 98 | } |
| 99 | |
| 100 | mOffset += length; |
| 101 | } |
| 102 | |
apatrick@chromium.org | 6f1796f | 2012-07-12 01:40:11 +0000 | [diff] [blame] | 103 | size_t offset() const |
| 104 | { |
| 105 | return mOffset; |
| 106 | } |
| 107 | |
apatrick@chromium.org | 8963ec2 | 2012-07-09 22:34:06 +0000 | [diff] [blame] | 108 | bool error() const |
| 109 | { |
| 110 | return mError; |
| 111 | } |
| 112 | |
| 113 | bool endOfStream() const |
| 114 | { |
| 115 | return mOffset == mLength; |
| 116 | } |
| 117 | |
| 118 | private: |
| 119 | DISALLOW_COPY_AND_ASSIGN(BinaryInputStream); |
| 120 | bool mError; |
| 121 | size_t mOffset; |
| 122 | const char *mData; |
| 123 | size_t mLength; |
Jamie Madill | 1b2a8f9 | 2014-05-14 13:09:39 -0400 | [diff] [blame] | 124 | |
| 125 | template <typename T> |
| 126 | void read(T *v, size_t num) |
| 127 | { |
| 128 | META_ASSERT(std::is_fundamental<T>::value); |
| 129 | |
| 130 | size_t length = num * sizeof(T); |
| 131 | |
| 132 | if (mOffset + length > mLength) |
| 133 | { |
| 134 | mError = true; |
| 135 | return; |
| 136 | } |
| 137 | |
| 138 | memcpy(v, mData + mOffset, length); |
| 139 | mOffset += length; |
| 140 | } |
| 141 | |
| 142 | template <typename T> |
| 143 | void read(T *v) |
| 144 | { |
| 145 | read(v, 1); |
| 146 | } |
| 147 | |
apatrick@chromium.org | 8963ec2 | 2012-07-09 22:34:06 +0000 | [diff] [blame] | 148 | }; |
| 149 | |
| 150 | class BinaryOutputStream |
| 151 | { |
| 152 | public: |
| 153 | BinaryOutputStream() |
| 154 | { |
| 155 | } |
| 156 | |
Jamie Madill | 1b2a8f9 | 2014-05-14 13:09:39 -0400 | [diff] [blame] | 157 | // writeInt also handles bool types |
| 158 | template <class IntT> |
| 159 | void writeInt(IntT param) |
apatrick@chromium.org | 8963ec2 | 2012-07-09 22:34:06 +0000 | [diff] [blame] | 160 | { |
Jamie Madill | 1b2a8f9 | 2014-05-14 13:09:39 -0400 | [diff] [blame] | 161 | ASSERT(rx::IsIntegerCastSafe<int>(param)); |
| 162 | int intValue = static_cast<int>(param); |
| 163 | write(&intValue, 1); |
Geoff Lang | 11c3b30 | 2014-05-13 22:33:31 +0000 | [diff] [blame] | 164 | } |
| 165 | |
Jamie Madill | 1b2a8f9 | 2014-05-14 13:09:39 -0400 | [diff] [blame] | 166 | void writeString(const std::string &v) |
Geoff Lang | 11c3b30 | 2014-05-13 22:33:31 +0000 | [diff] [blame] | 167 | { |
Jamie Madill | 1b2a8f9 | 2014-05-14 13:09:39 -0400 | [diff] [blame] | 168 | writeInt(v.length()); |
| 169 | write(v.c_str(), v.length()); |
apatrick@chromium.org | 8963ec2 | 2012-07-09 22:34:06 +0000 | [diff] [blame] | 170 | } |
| 171 | |
Ehsan Akhgari | aa7e166 | 2014-07-05 21:13:11 -0400 | [diff] [blame] | 172 | void writeBytes(const unsigned char *bytes, size_t count) |
apatrick@chromium.org | 8963ec2 | 2012-07-09 22:34:06 +0000 | [diff] [blame] | 173 | { |
Jamie Madill | 1b2a8f9 | 2014-05-14 13:09:39 -0400 | [diff] [blame] | 174 | write(bytes, count); |
apatrick@chromium.org | 8963ec2 | 2012-07-09 22:34:06 +0000 | [diff] [blame] | 175 | } |
| 176 | |
apatrick@chromium.org | 6f1796f | 2012-07-12 01:40:11 +0000 | [diff] [blame] | 177 | size_t length() const |
apatrick@chromium.org | 8963ec2 | 2012-07-09 22:34:06 +0000 | [diff] [blame] | 178 | { |
apatrick@chromium.org | 6f1796f | 2012-07-12 01:40:11 +0000 | [diff] [blame] | 179 | return mData.size(); |
| 180 | } |
apatrick@chromium.org | 8963ec2 | 2012-07-09 22:34:06 +0000 | [diff] [blame] | 181 | |
apatrick@chromium.org | 6f1796f | 2012-07-12 01:40:11 +0000 | [diff] [blame] | 182 | const void* data() const |
| 183 | { |
| 184 | return mData.size() ? &mData[0] : NULL; |
apatrick@chromium.org | 8963ec2 | 2012-07-09 22:34:06 +0000 | [diff] [blame] | 185 | } |
| 186 | |
| 187 | private: |
| 188 | DISALLOW_COPY_AND_ASSIGN(BinaryOutputStream); |
| 189 | std::vector<char> mData; |
Jamie Madill | 1b2a8f9 | 2014-05-14 13:09:39 -0400 | [diff] [blame] | 190 | |
| 191 | template <typename T> |
| 192 | void write(const T *v, size_t num) |
| 193 | { |
| 194 | META_ASSERT(std::is_fundamental<T>::value); |
| 195 | const char *asBytes = reinterpret_cast<const char*>(v); |
| 196 | mData.insert(mData.end(), asBytes, asBytes + num * sizeof(T)); |
| 197 | } |
| 198 | |
apatrick@chromium.org | 8963ec2 | 2012-07-09 22:34:06 +0000 | [diff] [blame] | 199 | }; |
| 200 | } |
| 201 | |
| 202 | #endif // LIBGLESV2_BINARYSTREAM_H_ |