Add LZMA.

3rdparty/lzma-21.03beta/CPP/7zip/UI/Common/DefaultName.cpp

@@ -0,0 +1,37 @@
+// DefaultName.cpp
+
+#include "StdAfx.h"
+
+#include "DefaultName.h"
+
+static UString GetDefaultName3(const UString &fileName,
+    const UString &extension, const UString &addSubExtension)
+{
+  const unsigned extLen = extension.Len();
+  const unsigned fileNameLen = fileName.Len();
+  
+  if (fileNameLen > extLen + 1)
+  {
+    const unsigned dotPos = fileNameLen - (extLen + 1);
+    if (fileName[dotPos] == '.')
+      if (extension.IsEqualTo_NoCase(fileName.Ptr(dotPos + 1)))
+        return fileName.Left(dotPos) + addSubExtension;
+  }
+  
+  int dotPos = fileName.ReverseFind_Dot();
+  if (dotPos > 0)
+    return fileName.Left((unsigned)dotPos) + addSubExtension;
+
+  if (addSubExtension.IsEmpty())
+    return fileName + L'~';
+  else
+    return fileName + addSubExtension;
+}
+
+UString GetDefaultName2(const UString &fileName,
+    const UString &extension, const UString &addSubExtension)
+{
+  UString name = GetDefaultName3(fileName, extension, addSubExtension);
+  name.TrimRight();
+  return name;
+}