kc3-lang/angle/src/common/string_utils.cpp

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• Author : Jamie Madill
  Date : 2015-06-01 14:14:04
  Hash : c7be82ae
  Message : Change behaviour of string_utils, also fix file io. File IO tested manually in a follow-up patch. BUG=angleproject:998 Change-Id: I0bfa778d1787cdedfbf3cd68cd134477e6dcd23c Reviewed-on: https://chromium-review.googlesource.com/274030 Reviewed-by: Geoff Lang <geofflang@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org>

• src/common/string_utils.cpp

• //
  // Copyright 2015 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  // string_utils:
  //   String helper functions.
  //
  
  #include "string_utils.h"
  
  #include <fstream>
  #include <sstream>
  
  namespace angle
  {
  
  void SplitString(const std::string &input,
                   char delimiter,
                   std::vector<std::string> *tokensOut)
  {
      std::istringstream stream(input);
      std::string token;
  
      while (std::getline(stream, token, delimiter))
      {
          if (!token.empty())
          {
              tokensOut->push_back(token);
          }
      }
  }
  
  void SplitStringAlongWhitespace(const std::string &input,
                                  std::vector<std::string> *tokensOut)
  {
      const char *delimiters = " \f\n\r\t\v";
  
      std::istringstream stream(input);
      std::string line;
  
      while (std::getline(stream, line))
      {
          size_t prev = 0, pos;
          while ((pos = line.find_first_of(delimiters, prev)) != std::string::npos)
          {
              if (pos > prev)
                  tokensOut->push_back(line.substr(prev, pos - prev));
              prev = pos + 1;
          }
          if (prev < line.length())
              tokensOut->push_back(line.substr(prev, std::string::npos));
      }
  }
  
  bool HexStringToUInt(const std::string &input, unsigned int *uintOut)
  {
      unsigned int offset = 0;
  
      if (input.size() >= 2 && input[0] == '0' && input[1] == 'x')
      {
          offset = 2u;
      }
  
      // Simple validity check
      if (input.find_first_not_of("0123456789ABCDEFabcdef", offset) != std::string::npos)
      {
          return false;
      }
  
      std::stringstream inStream(input);
      inStream >> std::hex >> *uintOut;
      return !inStream.fail();
  }
  
  bool ReadFileToString(const std::string &path, std::string *stringOut)
  {
      std::ifstream inFile(path.c_str());
      if (inFile.fail())
      {
          return false;
      }
  
      inFile.seekg(0, std::ios::end);
      stringOut->reserve(static_cast<std::string::size_type>(inFile.tellg()));
      inFile.seekg(0, std::ios::beg);
  
      stringOut->assign(std::istreambuf_iterator<char>(inFile), std::istreambuf_iterator<char>());
      return !inFile.fail();
  }
  
  }