1 // FilePathAutoRename.cpp
2 
3 #include "StdAfx.h"
4 
5 #include "../../Common/Defs.h"
6 #include "../../Common/IntToString.h"
7 
8 #include "../../Windows/FileFind.h"
9 
10 #include "FilePathAutoRename.h"
11 
12 using namespace NWindows;
13 
14 static bool MakeAutoName(const FString &name,
15     const FString &extension, UInt32 value, FString &path)
16 {
17   char temp[16];
18   ConvertUInt32ToString(value, temp);
19   path = name;
20   path.AddAscii(temp);
21   path += extension;
22   return NFile::NFind::DoesFileOrDirExist(path);
23 }
24 
25 bool AutoRenamePath(FString &path)
26 {
27   int dotPos = path.ReverseFind_Dot();
28   int slashPos = path.ReverseFind_PathSepar();
29 
30   FString name = path;
31   FString extension;
32   if (dotPos > slashPos + 1)
33   {
34     name.DeleteFrom(dotPos);
35     extension = path.Ptr(dotPos);
36   }
37   name += FTEXT('_');
38 
39   FString temp;
40 
41   UInt32 left = 1, right = ((UInt32)1 << 30);
42   while (left != right)
43   {
44     UInt32 mid = (left + right) / 2;
45     if (MakeAutoName(name, extension, mid, temp))
46       left = mid + 1;
47     else
48       right = mid;
49   }
50   return !MakeAutoName(name, extension, right, path);
51 }
52