104 lines
3.7 KiB
Plaintext
104 lines
3.7 KiB
Plaintext
// Copyright (c) 2011-2016 Ryan Prichard
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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#include "Buffer.h"
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#include <stdint.h>
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#include "DebugClient.h"
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#include "WinptyAssert.h"
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// Define the READ_BUFFER_CHECK() macro. It *must* evaluate its condition,
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// exactly once.
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#define READ_BUFFER_CHECK(cond) \
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do { \
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if (!(cond)) { \
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trace("decode error: %s", #cond); \
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throw DecodeError(); \
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} \
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} while (false)
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enum class Piece : uint8_t { Int32, Int64, WString };
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void WriteBuffer::putRawData(const void *data, size_t len) {
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const auto p = reinterpret_cast<const char*>(data);
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m_buf.insert(m_buf.end(), p, p + len);
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}
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void WriteBuffer::replaceRawData(size_t pos, const void *data, size_t len) {
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ASSERT(pos <= m_buf.size() && len <= m_buf.size() - pos);
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const auto p = reinterpret_cast<const char*>(data);
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std::copy(p, p + len, &m_buf[pos]);
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}
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void WriteBuffer::putInt32(int32_t i) {
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putRawValue(Piece::Int32);
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putRawValue(i);
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}
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void WriteBuffer::putInt64(int64_t i) {
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putRawValue(Piece::Int64);
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putRawValue(i);
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}
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// len is in characters, excluding NUL, i.e. the number of wchar_t elements
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void WriteBuffer::putWString(const wchar_t *str, size_t len) {
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putRawValue(Piece::WString);
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putRawValue(static_cast<uint64_t>(len));
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putRawData(str, sizeof(wchar_t) * len);
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}
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void ReadBuffer::getRawData(void *data, size_t len) {
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ASSERT(m_off <= m_buf.size());
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READ_BUFFER_CHECK(len <= m_buf.size() - m_off);
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const char *const inp = &m_buf[m_off];
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std::copy(inp, inp + len, reinterpret_cast<char*>(data));
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m_off += len;
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}
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int32_t ReadBuffer::getInt32() {
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READ_BUFFER_CHECK(getRawValue<Piece>() == Piece::Int32);
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return getRawValue<int32_t>();
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}
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int64_t ReadBuffer::getInt64() {
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READ_BUFFER_CHECK(getRawValue<Piece>() == Piece::Int64);
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return getRawValue<int64_t>();
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}
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std::wstring ReadBuffer::getWString() {
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READ_BUFFER_CHECK(getRawValue<Piece>() == Piece::WString);
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const uint64_t charLen = getRawValue<uint64_t>();
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READ_BUFFER_CHECK(charLen <= SIZE_MAX / sizeof(wchar_t));
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// To be strictly conforming, we can't use the convenient wstring
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// constructor, because the string in m_buf mightn't be aligned.
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std::wstring ret;
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if (charLen > 0) {
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const size_t byteLen = charLen * sizeof(wchar_t);
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ret.resize(charLen);
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getRawData(&ret[0], byteLen);
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}
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return ret;
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}
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void ReadBuffer::assertEof() {
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READ_BUFFER_CHECK(m_off == m_buf.size());
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}
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