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/thirdparty/breakpad/common/mac/macho_id.h

http://github.com/tomahawk-player/tomahawk
C++ Header | 120 lines | 38 code | 26 blank | 56 comment | 0 complexity | 278c23cb7f1188ba3dfd6587e5a0565b MD5 | raw file
  1// Copyright (c) 2006, Google Inc.
  2// All rights reserved.
  3//
  4// Redistribution and use in source and binary forms, with or without
  5// modification, are permitted provided that the following conditions are
  6// met:
  7//
  8//     * Redistributions of source code must retain the above copyright
  9// notice, this list of conditions and the following disclaimer.
 10//     * Redistributions in binary form must reproduce the above
 11// copyright notice, this list of conditions and the following disclaimer
 12// in the documentation and/or other materials provided with the
 13// distribution.
 14//     * Neither the name of Google Inc. nor the names of its
 15// contributors may be used to endorse or promote products derived from
 16// this software without specific prior written permission.
 17//
 18// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 19// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 20// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 21// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 22// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 23// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 24// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 25// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 26// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 27// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 28// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 29
 30// macho_id.h: Functions to gather identifying information from a macho file
 31//
 32// Author: Dan Waylonis
 33
 34#ifndef COMMON_MAC_MACHO_ID_H__
 35#define COMMON_MAC_MACHO_ID_H__
 36
 37#include <limits.h>
 38#include <mach-o/loader.h>
 39
 40#include "common/mac/macho_walker.h"
 41#include "common/md5.h"
 42
 43namespace MacFileUtilities {
 44
 45class MachoID {
 46 public:
 47  MachoID(const char *path);
 48  MachoID(const char *path, void *memory, size_t size);
 49  ~MachoID();
 50
 51  // For the given |cpu_type|, return a UUID from the LC_UUID command.
 52  // Return false if there isn't a LC_UUID command.
 53  bool UUIDCommand(int cpu_type, unsigned char identifier[16]);
 54
 55  // For the given |cpu_type|, return a UUID from the LC_ID_DYLIB command.
 56  // Return false if there isn't a LC_ID_DYLIB command.
 57  bool IDCommand(int cpu_type, unsigned char identifier[16]);
 58
 59  // For the given |cpu_type|, return the Adler32 CRC for the mach-o data
 60  // segment(s).
 61  // Return 0 on error (e.g., if the file is not a mach-o file)
 62  uint32_t Adler32(int cpu_type);
 63
 64  // For the given |cpu_type|, return the MD5 for the mach-o data segment(s).
 65  // Return true on success, false otherwise
 66  bool MD5(int cpu_type, unsigned char identifier[16]);
 67
 68 private:
 69  // Signature of class member function to be called with data read from file
 70  typedef void (MachoID::*UpdateFunction)(unsigned char *bytes, size_t size);
 71
 72  // Update the CRC value by examining |size| |bytes| and applying the algorithm
 73  // to each byte.
 74  void UpdateCRC(unsigned char *bytes, size_t size);
 75
 76  // Update the MD5 value by examining |size| |bytes| and applying the algorithm
 77  // to each byte.
 78  void UpdateMD5(unsigned char *bytes, size_t size);
 79
 80  // Bottleneck for update routines
 81  void Update(MachoWalker *walker, off_t offset, size_t size);
 82
 83  // Factory for the MachoWalker
 84  bool WalkHeader(int cpu_type, MachoWalker::LoadCommandCallback callback,
 85                  void *context);
 86
 87  // The callback from the MachoWalker for CRC and MD5
 88  static bool WalkerCB(MachoWalker *walker, load_command *cmd, off_t offset,
 89                       bool swap, void *context);
 90
 91  // The callback from the MachoWalker for LC_UUID
 92  static bool UUIDWalkerCB(MachoWalker *walker, load_command *cmd, off_t offset,
 93                           bool swap, void *context);
 94
 95  // The callback from the MachoWalker for LC_ID_DYLIB
 96  static bool IDWalkerCB(MachoWalker *walker, load_command *cmd, off_t offset,
 97                         bool swap, void *context);
 98
 99  // File path
100  char path_[PATH_MAX];
101
102  // Memory region to read from
103  void *memory_;
104
105  // Size of the memory region
106  size_t memory_size_;
107
108  // The current crc value
109  uint32_t crc_;
110
111  // The MD5 context
112  google_breakpad::MD5Context md5_context_;
113
114  // The current update to call from the Update callback
115  UpdateFunction update_function_;
116};
117
118}  // namespace MacFileUtilities
119
120#endif  // COMMON_MAC_MACHO_ID_H__