/thirdparty/breakpad/common/dwarf/bytereader-inl.h
http://github.com/tomahawk-player/tomahawk · C++ Header · 175 lines · 114 code · 29 blank · 32 comment · 13 complexity · d66adffc093fb0996f85cbc1788b1e08 MD5 · raw file
- // Copyright 2006 Google 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:
- //
- // * Redistributions of source code must retain the above copyright
- // notice, this list of conditions and the following disclaimer.
- // * 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.
- // * Neither the name of Google Inc. nor the names of its
- // contributors may be used to endorse or promote products derived from
- // this software without specific prior written permission.
- //
- // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- // "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 THE COPYRIGHT
- // OWNER 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.
- #ifndef UTIL_DEBUGINFO_BYTEREADER_INL_H__
- #define UTIL_DEBUGINFO_BYTEREADER_INL_H__
- #include "common/dwarf/bytereader.h"
- #include <assert.h>
- namespace dwarf2reader {
- inline uint8 ByteReader::ReadOneByte(const char* buffer) const {
- return buffer[0];
- }
- inline uint16 ByteReader::ReadTwoBytes(const char* signed_buffer) const {
- const unsigned char *buffer
- = reinterpret_cast<const unsigned char *>(signed_buffer);
- const uint16 buffer0 = buffer[0];
- const uint16 buffer1 = buffer[1];
- if (endian_ == ENDIANNESS_LITTLE) {
- return buffer0 | buffer1 << 8;
- } else {
- return buffer1 | buffer0 << 8;
- }
- }
- inline uint64 ByteReader::ReadFourBytes(const char* signed_buffer) const {
- const unsigned char *buffer
- = reinterpret_cast<const unsigned char *>(signed_buffer);
- const uint32 buffer0 = buffer[0];
- const uint32 buffer1 = buffer[1];
- const uint32 buffer2 = buffer[2];
- const uint32 buffer3 = buffer[3];
- if (endian_ == ENDIANNESS_LITTLE) {
- return buffer0 | buffer1 << 8 | buffer2 << 16 | buffer3 << 24;
- } else {
- return buffer3 | buffer2 << 8 | buffer1 << 16 | buffer0 << 24;
- }
- }
- inline uint64 ByteReader::ReadEightBytes(const char* signed_buffer) const {
- const unsigned char *buffer
- = reinterpret_cast<const unsigned char *>(signed_buffer);
- const uint64 buffer0 = buffer[0];
- const uint64 buffer1 = buffer[1];
- const uint64 buffer2 = buffer[2];
- const uint64 buffer3 = buffer[3];
- const uint64 buffer4 = buffer[4];
- const uint64 buffer5 = buffer[5];
- const uint64 buffer6 = buffer[6];
- const uint64 buffer7 = buffer[7];
- if (endian_ == ENDIANNESS_LITTLE) {
- return buffer0 | buffer1 << 8 | buffer2 << 16 | buffer3 << 24 |
- buffer4 << 32 | buffer5 << 40 | buffer6 << 48 | buffer7 << 56;
- } else {
- return buffer7 | buffer6 << 8 | buffer5 << 16 | buffer4 << 24 |
- buffer3 << 32 | buffer2 << 40 | buffer1 << 48 | buffer0 << 56;
- }
- }
- // Read an unsigned LEB128 number. Each byte contains 7 bits of
- // information, plus one bit saying whether the number continues or
- // not.
- inline uint64 ByteReader::ReadUnsignedLEB128(const char* buffer,
- size_t* len) const {
- uint64 result = 0;
- size_t num_read = 0;
- unsigned int shift = 0;
- unsigned char byte;
- do {
- byte = *buffer++;
- num_read++;
- result |= (static_cast<uint64>(byte & 0x7f)) << shift;
- shift += 7;
- } while (byte & 0x80);
- *len = num_read;
- return result;
- }
- // Read a signed LEB128 number. These are like regular LEB128
- // numbers, except the last byte may have a sign bit set.
- inline int64 ByteReader::ReadSignedLEB128(const char* buffer,
- size_t* len) const {
- int64 result = 0;
- unsigned int shift = 0;
- size_t num_read = 0;
- unsigned char byte;
- do {
- byte = *buffer++;
- num_read++;
- result |= (static_cast<uint64>(byte & 0x7f) << shift);
- shift += 7;
- } while (byte & 0x80);
- if ((shift < 8 * sizeof (result)) && (byte & 0x40))
- result |= -((static_cast<int64>(1)) << shift);
- *len = num_read;
- return result;
- }
- inline uint64 ByteReader::ReadOffset(const char* buffer) const {
- assert(this->offset_reader_);
- return (this->*offset_reader_)(buffer);
- }
- inline uint64 ByteReader::ReadAddress(const char* buffer) const {
- assert(this->address_reader_);
- return (this->*address_reader_)(buffer);
- }
- inline void ByteReader::SetCFIDataBase(uint64 section_base,
- const char *buffer_base) {
- section_base_ = section_base;
- buffer_base_ = buffer_base;
- have_section_base_ = true;
- }
- inline void ByteReader::SetTextBase(uint64 text_base) {
- text_base_ = text_base;
- have_text_base_ = true;
- }
- inline void ByteReader::SetDataBase(uint64 data_base) {
- data_base_ = data_base;
- have_data_base_ = true;
- }
- inline void ByteReader::SetFunctionBase(uint64 function_base) {
- function_base_ = function_base;
- have_function_base_ = true;
- }
- inline void ByteReader::ClearFunctionBase() {
- have_function_base_ = false;
- }
- } // namespace dwarf2reader
- #endif // UTIL_DEBUGINFO_BYTEREADER_INL_H__