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      1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef BASE_FILE_VERSION_INFO_H__
      6 #define BASE_FILE_VERSION_INFO_H__
      7 
      8 #include "build/build_config.h"
      9 
     10 #if defined(OS_WIN)
     11 #include <windows.h>
     12 // http://blogs.msdn.com/oldnewthing/archive/2004/10/25/247180.aspx
     13 extern "C" IMAGE_DOS_HEADER __ImageBase;
     14 #endif  // OS_WIN
     15 
     16 #include <string>
     17 
     18 #include "base/base_export.h"
     19 #include "base/strings/string16.h"
     20 
     21 namespace base {
     22 class FilePath;
     23 }
     24 
     25 // Provides an interface for accessing the version information for a file. This
     26 // is the information you access when you select a file in the Windows Explorer,
     27 // right-click select Properties, then click the Version tab, and on the Mac
     28 // when you select a file in the Finder and do a Get Info.
     29 //
     30 // This list of properties is straight out of Win32's VerQueryValue
     31 // <http://msdn.microsoft.com/en-us/library/ms647464.aspx> and the Mac
     32 // version returns values from the Info.plist as appropriate. TODO(avi): make
     33 // this a less-obvious Windows-ism.
     34 
     35 class FileVersionInfo {
     36  public:
     37   virtual ~FileVersionInfo() {}
     38 #if defined(OS_WIN) || defined(OS_MACOSX)
     39   // Creates a FileVersionInfo for the specified path. Returns NULL if something
     40   // goes wrong (typically the file does not exit or cannot be opened). The
     41   // returned object should be deleted when you are done with it.
     42   BASE_EXPORT static FileVersionInfo* CreateFileVersionInfo(
     43       const base::FilePath& file_path);
     44 #endif  // OS_WIN || OS_MACOSX
     45 
     46 #if defined(OS_WIN)
     47   // Creates a FileVersionInfo for the specified module. Returns NULL in case
     48   // of error. The returned object should be deleted when you are done with it.
     49   BASE_EXPORT static FileVersionInfo* CreateFileVersionInfoForModule(
     50       HMODULE module);
     51 
     52   // Creates a FileVersionInfo for the current module. Returns NULL in case
     53   // of error. The returned object should be deleted when you are done with it.
     54   // This function should be inlined so that the "current module" is evaluated
     55   // correctly, instead of being the module that contains base.
     56   __forceinline static FileVersionInfo*
     57   CreateFileVersionInfoForCurrentModule() {
     58     HMODULE module = reinterpret_cast<HMODULE>(&__ImageBase);
     59     return CreateFileVersionInfoForModule(module);
     60   }
     61 #else
     62   // Creates a FileVersionInfo for the current module. Returns NULL in case
     63   // of error. The returned object should be deleted when you are done with it.
     64   BASE_EXPORT static FileVersionInfo* CreateFileVersionInfoForCurrentModule();
     65 #endif  // OS_WIN
     66 
     67   // Accessors to the different version properties.
     68   // Returns an empty string if the property is not found.
     69   virtual base::string16 company_name() = 0;
     70   virtual base::string16 company_short_name() = 0;
     71   virtual base::string16 product_name() = 0;
     72   virtual base::string16 product_short_name() = 0;
     73   virtual base::string16 internal_name() = 0;
     74   virtual base::string16 product_version() = 0;
     75   virtual base::string16 private_build() = 0;
     76   virtual base::string16 special_build() = 0;
     77   virtual base::string16 comments() = 0;
     78   virtual base::string16 original_filename() = 0;
     79   virtual base::string16 file_description() = 0;
     80   virtual base::string16 file_version() = 0;
     81   virtual base::string16 legal_copyright() = 0;
     82   virtual base::string16 legal_trademarks() = 0;
     83   virtual base::string16 last_change() = 0;
     84   virtual bool is_official_build() = 0;
     85 };
     86 
     87 #endif  // BASE_FILE_VERSION_INFO_H__
     88