diff options
Diffstat (limited to 'Source/JavaScriptCore/wasm/WASMReader.cpp')
| -rw-r--r-- | Source/JavaScriptCore/wasm/WASMReader.cpp | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/Source/JavaScriptCore/wasm/WASMReader.cpp b/Source/JavaScriptCore/wasm/WASMReader.cpp deleted file mode 100644 index 28e1357a1..000000000 --- a/Source/JavaScriptCore/wasm/WASMReader.cpp +++ /dev/null @@ -1,141 +0,0 @@ -/* - * Copyright (C) 2015 Apple Inc. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY - * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR - * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY - * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include "config.h" -#include "WASMReader.h" - -#if ENABLE(WEBASSEMBLY) - -#include <wtf/text/StringBuilder.h> - -#define CHECK_READ(length) do { if (m_cursor + length > m_buffer.end()) return false; } while (0) - -namespace JSC { - -bool WASMReader::readUInt32(uint32_t& result) -{ - CHECK_READ(4); - result = m_cursor[0] | m_cursor[1] << 8 | m_cursor[2] << 16 | m_cursor[3] << 24; - m_cursor += 4; - return true; -} - -bool WASMReader::readFloat(float& result) -{ - CHECK_READ(4); - union { - uint8_t bytes[4]; - float floatValue; - } u = { -#if CPU(BIG_ENDIAN) - { m_cursor[3], m_cursor[2], m_cursor[1], m_cursor[0] } -#else - { m_cursor[0], m_cursor[1], m_cursor[2], m_cursor[3] } -#endif - }; - result = u.floatValue; - m_cursor += 4; - return true; -} - -bool WASMReader::readDouble(double& result) -{ - CHECK_READ(8); - union { - uint8_t bytes[8]; - double doubleValue; - } u = { -#if CPU(BIG_ENDIAN) - { m_cursor[7], m_cursor[6], m_cursor[5], m_cursor[4], m_cursor[3], m_cursor[2], m_cursor[1], m_cursor[0] } -#else - { m_cursor[0], m_cursor[1], m_cursor[2], m_cursor[3], m_cursor[4], m_cursor[5], m_cursor[6], m_cursor[7] } -#endif - }; - result = u.doubleValue; - m_cursor += 8; - return true; -} - -bool WASMReader::readCompactUInt32(uint32_t& result) -{ - uint32_t sum = 0; - unsigned shift = 0; - do { - CHECK_READ(1); - uint32_t byte = *m_cursor++; - if (byte < 0x80) { - if ((shift == 28 && byte >= 0x10) || (shift && !byte)) - return false; - result = sum | (byte << shift); - return true; - } - sum |= (byte & firstSevenBitsMask) << shift; - shift += 7; - } while (shift < 35); - return false; -} - -bool WASMReader::readString(String& result) -{ - StringBuilder builder; - while (true) { - CHECK_READ(1); - char c = *m_cursor++; - if (!c) - break; - builder.append(c); - } - result = builder.toString(); - return true; -} - -bool WASMReader::readType(WASMType& result) -{ - return readByte<WASMType>(result, (uint8_t)WASMType::NumberOfTypes); -} - -bool WASMReader::readExpressionType(WASMExpressionType& result) -{ - return readByte<WASMExpressionType>(result, (uint8_t)WASMExpressionType::NumberOfExpressionTypes); -} - -bool WASMReader::readExportFormat(WASMExportFormat& result) -{ - return readByte<WASMExportFormat>(result, (uint8_t)WASMExportFormat::NumberOfExportFormats); -} - -template <class T> bool WASMReader::readByte(T& result, uint8_t numberOfValues) -{ - CHECK_READ(1); - uint8_t byte = *m_cursor++; - if (byte >= numberOfValues) - return false; - result = T(byte); - return true; -} - -} // namespace JSC - -#endif // ENABLE(WEBASSEMBLY) |
