other-licenses/7zstub/src/7zip/Common/FilePathAutoRename.cpp

   1 // FilePathAutoRename.cpp
   2
   3 #include "StdAfx.h"
   4 #include "FilePathAutoRename.h"
   5
   6 #include "Common/Defs.h"
   7 #include "Common/IntToString.h"
   8
   9 #include "Windows/FileName.h"
  10 #include "Windows/FileFind.h"
  11
  12 using namespace NWindows;
  13
  14 static bool MakeAutoName(const UString &name,
  15     const UString &extension, int value, UString &path)
  16 {
  17   wchar_t number[32];
  18   ConvertUInt64ToString(value, number);
  19   path = name;
  20   path += number;
  21   path += extension;
  22   return NFile::NFind::DoesFileExist(path);
  23 }
  24
  25 bool AutoRenamePath(UString &fullProcessedPath)
  26 {
  27   UString path;
  28   int dotPos = fullProcessedPath.ReverseFind(L'.');
  29
  30   int slashPos = fullProcessedPath.ReverseFind(L'/');
  31   #ifdef _WIN32
  32   int slash1Pos = fullProcessedPath.ReverseFind(L'\\');
  33   slashPos = MyMax(slashPos, slash1Pos);
  34   #endif
  35
  36   UString name, extension;
  37   if (dotPos > slashPos &&  dotPos > 0)
  38   {
  39     name = fullProcessedPath.Left(dotPos);
  40     extension = fullProcessedPath.Mid(dotPos);
  41   }
  42   else
  43     name = fullProcessedPath;
  44   name += L'_';
  45   int indexLeft = 1, indexRight = (1 << 30);
  46   while (indexLeft != indexRight)
  47   {
  48     int indexMid = (indexLeft + indexRight) / 2;
  49     if (MakeAutoName(name, extension, indexMid, path))
  50       indexLeft = indexMid + 1;
  51     else
  52       indexRight = indexMid;
  53   }
  54   if (MakeAutoName(name, extension, indexRight, fullProcessedPath))
  55     return false;
  56   return true;
  57 }