1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/angle/src/libGLESv2/BinaryStream.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,164 @@
1.4 +//
1.5 +// Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
1.6 +// Use of this source code is governed by a BSD-style license that can be
1.7 +// found in the LICENSE file.
1.8 +//
1.9 +
1.10 +// BinaryStream.h: Provides binary serialization of simple types.
1.11 +
1.12 +#ifndef LIBGLESV2_BINARYSTREAM_H_
1.13 +#define LIBGLESV2_BINARYSTREAM_H_
1.14 +
1.15 +#include "common/angleutils.h"
1.16 +
1.17 +namespace gl
1.18 +{
1.19 +
1.20 +class BinaryInputStream
1.21 +{
1.22 + public:
1.23 + BinaryInputStream(const void *data, size_t length)
1.24 + {
1.25 + mError = false;
1.26 + mOffset = 0;
1.27 + mData = static_cast<const char*>(data);
1.28 + mLength = length;
1.29 + }
1.30 +
1.31 + template <typename T>
1.32 + void read(T *v, size_t num)
1.33 + {
1.34 + union
1.35 + {
1.36 + T dummy; // Compilation error for non-trivial types
1.37 + } dummy;
1.38 + (void) dummy;
1.39 +
1.40 + if (mError)
1.41 + {
1.42 + return;
1.43 + }
1.44 +
1.45 + size_t length = num * sizeof(T);
1.46 +
1.47 + if (mOffset + length > mLength)
1.48 + {
1.49 + mError = true;
1.50 + return;
1.51 + }
1.52 +
1.53 + memcpy(v, mData + mOffset, length);
1.54 + mOffset += length;
1.55 + }
1.56 +
1.57 + template <typename T>
1.58 + void read(T * v)
1.59 + {
1.60 + read(v, 1);
1.61 + }
1.62 +
1.63 + void read(std::string *v)
1.64 + {
1.65 + size_t length;
1.66 + read(&length);
1.67 +
1.68 + if (mError)
1.69 + {
1.70 + return;
1.71 + }
1.72 +
1.73 + if (mOffset + length > mLength)
1.74 + {
1.75 + mError = true;
1.76 + return;
1.77 + }
1.78 +
1.79 + v->assign(mData + mOffset, length);
1.80 + mOffset += length;
1.81 + }
1.82 +
1.83 + void skip(size_t length)
1.84 + {
1.85 + if (mOffset + length > mLength)
1.86 + {
1.87 + mError = true;
1.88 + return;
1.89 + }
1.90 +
1.91 + mOffset += length;
1.92 + }
1.93 +
1.94 + size_t offset() const
1.95 + {
1.96 + return mOffset;
1.97 + }
1.98 +
1.99 + bool error() const
1.100 + {
1.101 + return mError;
1.102 + }
1.103 +
1.104 + bool endOfStream() const
1.105 + {
1.106 + return mOffset == mLength;
1.107 + }
1.108 +
1.109 + private:
1.110 + DISALLOW_COPY_AND_ASSIGN(BinaryInputStream);
1.111 + bool mError;
1.112 + size_t mOffset;
1.113 + const char *mData;
1.114 + size_t mLength;
1.115 +};
1.116 +
1.117 +class BinaryOutputStream
1.118 +{
1.119 + public:
1.120 + BinaryOutputStream()
1.121 + {
1.122 + }
1.123 +
1.124 + template <typename T>
1.125 + void write(const T *v, size_t num)
1.126 + {
1.127 + union
1.128 + {
1.129 + T dummy; // Compilation error for non-trivial types
1.130 + } dummy;
1.131 + (void) dummy;
1.132 +
1.133 + const char *asBytes = reinterpret_cast<const char*>(v);
1.134 + mData.insert(mData.end(), asBytes, asBytes + num * sizeof(T));
1.135 + }
1.136 +
1.137 + template <typename T>
1.138 + void write(const T &v)
1.139 + {
1.140 + write(&v, 1);
1.141 + }
1.142 +
1.143 + void write(const std::string &v)
1.144 + {
1.145 + size_t length = v.length();
1.146 + write(length);
1.147 +
1.148 + write(v.c_str(), length);
1.149 + }
1.150 +
1.151 + size_t length() const
1.152 + {
1.153 + return mData.size();
1.154 + }
1.155 +
1.156 + const void* data() const
1.157 + {
1.158 + return mData.size() ? &mData[0] : NULL;
1.159 + }
1.160 +
1.161 + private:
1.162 + DISALLOW_COPY_AND_ASSIGN(BinaryOutputStream);
1.163 + std::vector<char> mData;
1.164 +};
1.165 +}
1.166 +
1.167 +#endif // LIBGLESV2_BINARYSTREAM_H_
