courgette/courgette_minimal_tool.cc

   1 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // 'courgette_minimal_tool' is not meant to be a serious command-line tool.  It
   6 // has the minimum logic to apply a Courgette patch to a file.  The main purpose
   7 // is to monitor the code size of the patcher.
   8
   9 #include <string>
  10
  11 #include "courgette/third_party/bsdiff.h"
  12 #include "courgette/courgette.h"
  13 #include "courgette/streams.h"
  14
  15 void PrintHelp() {
  16   fprintf(stderr,
  17     "Usage:\n"
  18     "  courgette_minimal_tool <old-file-input> <patch-file-input>"
  19     " <new-file-output>\n"
  20     "\n");
  21 }
  22
  23 void UsageProblem(const char* message) {
  24   fprintf(stderr, "%s\n", message);
  25   PrintHelp();
  26   exit(1);
  27 }
  28
  29 void Problem(const char* message) {
  30   fprintf(stderr, "%s\n", message);
  31   exit(1);
  32 }
  33
  34 #if defined(OS_WIN)
  35 int wmain(int argc, const wchar_t* argv[]) {
  36 #else
  37 int main(int argc, const char* argv[]) {
  38 #endif
  39   if (argc != 4)
  40     UsageProblem("bad args");
  41
  42   courgette::Status status =
  43       courgette::ApplyEnsemblePatch(argv[1], argv[2], argv[3]);
  44
  45   if (status != courgette::C_OK) {
  46     if (status == courgette::C_READ_OPEN_ERROR) Problem("Can't open file.");
  47     if (status == courgette::C_WRITE_OPEN_ERROR) Problem("Can't open file.");
  48     if (status == courgette::C_READ_ERROR) Problem("Can't read from file.");
  49     if (status == courgette::C_WRITE_ERROR) Problem("Can't write to file.");
  50     Problem("patch failed.");
  51   }
  52
  53   return 0;
  54 }