Add woff2 to src/third_party

third_party/woff2/src/woff2_decompress.cc

+// Copyright 2013 Google Inc. All Rights Reserved.
+//
+// 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.
+//
+// A very simple commandline tool for decompressing woff2 format files to true
+// type font files.
+
+#include <string>
+
+
+#include "file.h"
+#include "./woff2_dec.h"
+
+int main(int argc, char **argv) {
+  using std::string;
+
+  if (argc != 2) {
+    fprintf(stderr, "One argument, the input filename, must be provided.\n");
+    return 1;
+  }
+
+  string filename(argv[1]);
+  string outfilename = filename.substr(0, filename.find_last_of(".")) + ".ttf";
+  fprintf(stdout, "Processing %s => %s\n",
+    filename.c_str(), outfilename.c_str());
+  string input = woff2::GetFileContent(filename);
+
+  size_t decompressed_size = woff2::ComputeWOFF2FinalSize(
+      reinterpret_cast<const uint8_t*>(input.data()), input.size());
+  string output(decompressed_size, 0);
+  const bool ok = woff2::ConvertWOFF2ToTTF(
+      reinterpret_cast<uint8_t*>(&output[0]), decompressed_size,
+      reinterpret_cast<const uint8_t*>(input.data()), input.size());
+
+  if (!ok) {
+    fprintf(stderr, "Decompression failed\n");
+    return 1;
+  }
+
+  woff2::SetFileContents(outfilename, output);
+
+  return 0;
+}
+