// Converts: some/path/to/file.xx
// to: file
// (note that suffix is removed)
string GetFilename(StringPiece path);

// Converts:
//   cc/ops/gen_foo_ops.h
// to:
//   CC_OPS_GEN_FOO_OPS_H_
string ToGuard(StringPiece path);

// Converts: some_name_xyz
// to: Some Name Xyz
string ToTitle(StringPiece name);

// Change:     Into:
//   ABC         /// ABC
//               ///
//   DEF         /// DEF