bool DiffFiles(const std::string &FileA, const std::string &FileB,
std::string *Error = 0);
+/// DiffFilesWithTolerance - Compare the two files specified, returning 0 if the
+/// files match, 1 if they are different, and 2 if there is a file error. This
+/// function differs from DiffFiles in that you can specify an absolete and
+/// relative FP error that is allowed to exist. 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.
+///
+int DiffFilesWithTolerance(const std::string &FileA, const std::string &FileB,
+ double AbsTol, double RelTol,
+ 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.