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 // Copyright (c) 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

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 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 // file_id.h: Return a unique identifier for a file

 //

 // Author: Dan Waylonis

 #ifndef COMMON_MAC_FILE_ID_H__

 #define COMMON_MAC_FILE_ID_H__

 #include <limits.h>

 #include <mach/machine.h>

 namespace google_breakpad {

 class FileID {

  public:

   FileID(const char *path);

   ~FileID() {};

   // Load the identifier for the file path specified in the constructor into

   // |identifier|.  Return false if the identifier could not be created for the

   // file.

   // The current implementation will return the MD5 hash of the file's bytes.

   bool FileIdentifier(unsigned char identifier[16]);

   // Treat the file as a mach-o file that will contain one or more archicture.

   // Accepted values for |cpu_type| and |cpu_subtype| (e.g., CPU_TYPE_X86 or

   // CPU_TYPE_POWERPC) are listed in /usr/include/mach/machine.h.

   // If |cpu_type| is 0, then the native cpu type is used. If |cpu_subtype| is

   // CPU_SUBTYPE_MULTIPLE, the match is only done on |cpu_type|.

   // Returns false if opening the file failed or if the |cpu_type|/|cpu_subtype|

   // is not present in the file.

   // Return the unique identifier in |identifier|.

   // The current implementation will look for the (in order of priority):

   // LC_UUID, LC_ID_DYLIB, or MD5 hash of the given |cpu_type|.

   bool MachoIdentifier(cpu_type_t cpu_type,

                        cpu_subtype_t cpu_subtype,

                        unsigned char identifier[16]);

   // Convert the |identifier| data to a NULL terminated string.  The string will

   // be formatted as a UUID (e.g., 22F065BB-FC9C-49F7-80FE-26A7CEBD7BCE).

   // The |buffer| should be at least 37 bytes long to receive all of the data

   // and termination.  Shorter buffers will contain truncated data.

   static void ConvertIdentifierToString(const unsigned char identifier[16],

                                         char *buffer, int buffer_length);

  private:

   // Storage for the path specified

   char path_[PATH_MAX];

 };

 }  // namespace google_breakpad

 #endif  // COMMON_MAC_FILE_ID_H__