1 files changed, 36 insertions, 0 deletions
diff --git a/src/extensions/far/compile-strings.cc b/src/extensions/far/compile-strings.cc
new file mode 100644
index 0000000..e8a99cc
--- /dev/null
+++ b/src/extensions/far/compile-strings.cc
@@ -0,0 +1,36 @@
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// Copyright 2005-2010 Google, Inc.
+// Author: jpr@google.com (Jake Ratkiewicz)
+
+#include <fst/extensions/far/compile-strings.h>
+#include <iostream>
+#include <fstream>
+
+namespace fst {
+
+// Compute the minimal length required to
+// encode each line number as a decimal number
+int KeySize(const char *filename) {
+  ifstream istrm(filename);
+  istrm.seekg(0);
+  string s;
+  int nline = 0;
+  while (getline(istrm, s))
+    ++nline;
+  istrm.seekg(0);
+  return nline ? ceil(log10(nline + 1)) : 1;
+}
+
+}  // namespace fst