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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7482 91177308-0d34-0410-b5e6-96231b3b80d8

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diff --git a/include/Support/FileUtilities.h b/include/Support/FileUtilities.h
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+++ b/include/Support/FileUtilities.h
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+//===- Support/FileUtilities.h - File System Utilities ----------*- C++ -*-===//
+//
+// This file defines a family of utility functions which are useful for doing
+// various things with files.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SUPPORT_FILEUTILITIES_H
+#define SUPPORT_FILEUTILITIES_H
+
+#include <string>
+
+/// DiffFiles - Compare the two files specified, returning true if they are
+/// different or if there is a file error.  If you specify a string to fill in
+/// for the error option, it will set the string to an error message if an error
+/// occurs, allowing the caller to distinguish between a failed diff and a file
+/// system error.
+///
+bool DiffFiles(const std::string &FileA, const std::string &FileB,
+               std::string *Error = 0);
+
+
+/// MoveFileOverIfUpdated - If the file specified by New is different than Old,
+/// or if Old does not exist, move the New file over the Old file.  Otherwise,
+/// remove the New file.
+///
+void MoveFileOverIfUpdated(const std::string &New, const std::string &Old);
+ 
+#endif