/*============================================================================
  CMake - Cross Platform Makefile Generator
  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium

  Distributed under the OSI-approved BSD License (the "License");
  see accompanying file Copyright.txt for details.

  This software is distributed WITHOUT ANY WARRANTY; without even the
  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the License for more information.
============================================================================*/
#include "cmSeparateArgumentsCommand.h"

// cmSeparateArgumentsCommand
bool cmSeparateArgumentsCommand::InitialPass(
  std::vector<std::string> const& args, cmExecutionStatus&)
{
  if (args.empty()) {
    this->SetError("must be given at least one argument.");
    return false;
  }

  std::string var;
  std::string command;
  enum Mode
  {
    ModeOld,
    ModeUnix,
    ModeWindows
  };
  Mode mode = ModeOld;
  enum Doing
  {
    DoingNone,
    DoingVariable,
    DoingMode,
    DoingCommand
  };
  Doing doing = DoingVariable;
  for (unsigned int i = 0; i < args.size(); ++i) {
    if (doing == DoingVariable) {
      var = args[i];
      doing = DoingMode;
    } else if (doing == DoingMode && args[i] == "UNIX_COMMAND") {
      mode = ModeUnix;
      doing = DoingCommand;
    } else if (doing == DoingMode && args[i] == "WINDOWS_COMMAND") {
      mode = ModeWindows;
      doing = DoingCommand;
    } else if (doing == DoingCommand) {
      command = args[i];
      doing = DoingNone;
    } else {
      std::ostringstream e;
      e << "given unknown argument " << args[i];
      this->SetError(e.str());
      return false;
    }
  }

  if (mode == ModeOld) {
    // Original space-replacement version of command.
    if (const char* def = this->Makefile->GetDefinition(var)) {
      std::string value = def;
      cmSystemTools::ReplaceString(value, " ", ";");
      this->Makefile->AddDefinition(var, value.c_str());
    }
  } else {
    // Parse the command line.
    std::vector<std::string> vec;
    if (mode == ModeUnix) {
      cmSystemTools::ParseUnixCommandLine(command.c_str(), vec);
    } else // if(mode == ModeWindows)
    {
      cmSystemTools::ParseWindowsCommandLine(command.c_str(), vec);
    }

    // Construct the result list value.
    std::string value;
    const char* sep = "";
    for (std::vector<std::string>::const_iterator vi = vec.begin();
         vi != vec.end(); ++vi) {
      // Separate from the previous argument.
      value += sep;
      sep = ";";

      // Preserve semicolons.
      for (std::string::const_iterator si = vi->begin(); si != vi->end();
           ++si) {
        if (*si == ';') {
          value += '\\';
        }
        value += *si;
      }
    }
    this->Makefile->AddDefinition(var, value.c_str());
  }

  return true;
}
