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-rw-r--r--other-licenses/7zstub/src/CPP/7zip/Common/FilePathAutoRename.cpp46
1 files changed, 46 insertions, 0 deletions
diff --git a/other-licenses/7zstub/src/CPP/7zip/Common/FilePathAutoRename.cpp b/other-licenses/7zstub/src/CPP/7zip/Common/FilePathAutoRename.cpp
new file mode 100644
index 000000000..84c9e2bce
--- /dev/null
+++ b/other-licenses/7zstub/src/CPP/7zip/Common/FilePathAutoRename.cpp
@@ -0,0 +1,46 @@
+// FilePathAutoRename.cpp
+
+#include "StdAfx.h"
+
+#include "../../Windows/FileFind.h"
+
+#include "FilePathAutoRename.h"
+
+using namespace NWindows;
+
+static bool MakeAutoName(const FString &name,
+ const FString &extension, UInt32 value, FString &path)
+{
+ path = name;
+ path.Add_UInt32(value);
+ path += extension;
+ return NFile::NFind::DoesFileOrDirExist(path);
+}
+
+bool AutoRenamePath(FString &path)
+{
+ int dotPos = path.ReverseFind_Dot();
+ int slashPos = path.ReverseFind_PathSepar();
+
+ FString name = path;
+ FString extension;
+ if (dotPos > slashPos + 1)
+ {
+ name.DeleteFrom(dotPos);
+ extension = path.Ptr(dotPos);
+ }
+ name += '_';
+
+ FString temp;
+
+ UInt32 left = 1, right = ((UInt32)1 << 30);
+ while (left != right)
+ {
+ UInt32 mid = (left + right) / 2;
+ if (MakeAutoName(name, extension, mid, temp))
+ left = mid + 1;
+ else
+ right = mid;
+ }
+ return !MakeAutoName(name, extension, right, path);
+}