ppapi/native_client/src/trusted/plugin/pnacl_options.cc

   1 // Copyright (c) 2013 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 #include "ppapi/native_client/src/trusted/plugin/pnacl_options.h"
   6
   7 #include <iterator>
   8 #include <vector>
   9
  10 #include "native_client/src/include/nacl_string.h"
  11
  12 namespace {
  13
  14 nacl::string ReplaceBadFSChars(nacl::string str,
  15                                const nacl::string& bad_chars,
  16                                const nacl::string& replacement) {
  17   size_t replace_pos = str.find_first_of(bad_chars);
  18   while (replace_pos != nacl::string::npos) {
  19     str = str.replace(replace_pos, 1, replacement);
  20     replace_pos = str.find_first_of(bad_chars);
  21   }
  22   return str;
  23 }
  24
  25 }  // namespace
  26
  27 namespace plugin {
  28
  29 PnaclOptions::PnaclOptions() : translate_(false), opt_level_(2) { }
  30
  31 PnaclOptions::~PnaclOptions() {
  32 }
  33
  34 nacl::string PnaclOptions::GetCacheKey() const {
  35   // TODO(jvoung): We need to read the PNaCl translator's manifest
  36   // to grab the NaCl / PNaCl ABI version too.
  37   nacl::stringstream ss;
  38   // Cast opt_level_ as int so that it doesn't think it's a char.
  39   ss << "-O:" << static_cast<int>(opt_level_)
  40      <<  ";cache_validators:" << cache_validators_;
  41   // HTML5 FileSystem-based cache does not allow some characters which
  42   // may appear in URLs, ETags, or Last-Modified times.  Once we move to
  43   // our own cache-backend, it will be more tolerant of various cache
  44   // key values.
  45   // See: http://dev.w3.org/2009/dap/file-system/file-dir-sys.html#naming-restrictions
  46   nacl::string key = ss.str();
  47   key = ReplaceBadFSChars(key, "/", "_FWDSLASH_");
  48   key = ReplaceBadFSChars(key, "\\", "_BCKSLASH_");
  49   key = ReplaceBadFSChars(key, "\0", "_NULL_");
  50   return key;
  51 }
  52
  53 void PnaclOptions::set_opt_level(int32_t l) {
  54   if (l <= 0) {
  55     opt_level_ = 0;
  56     return;
  57   }
  58   // Currently only allow 0 or 2, since that is what we test.
  59   opt_level_ = 2;
  60 }
  61
  62 std::vector<char> PnaclOptions::GetOptCommandline() const {
  63   std::vector<char> result;
  64   nacl::string str;
  65
  66   nacl::stringstream ss;
  67   ss << "-O" << opt_level_;
  68   str = ss.str();
  69
  70   std::copy(str.begin(), str.end(), std::back_inserter(result));
  71   result.push_back('\x00');
  72
  73   return result;
  74 }
  75
  76 }  // namespace plugin