#include "cmt_syntax.h"
#include "cmt.h"
#include "cmt_symbol.h"
#include "cmt_constituent.h"
#include "cmt_pattern.h"
#include "cmt_error.h"
#include "cmt_branch.h"
#include "cmt_error.h"
#include "cmt_script.h"
#include "cmt_language.h"
#include "cmt_project.h"
#include "cmt_cmtpath_pattern.h"

class KwdAlias : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Symbol::action (words, CommandAlias, use);
  }
};

class KwdApplication : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    if (use == &(Use::current ()))
      {
	Constituent::action (Application, words);
      }
  }
};

class KwdApplyPattern : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    ApplyPattern::action (words, use);
  }
};

class KwdApplyTag : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Tag::action_apply (words, use);
  }
};

class KwdAuthor : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    use->author_action (words);
  }
};

class KwdBranches : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    if (use == &(Use::current ())) 
      {
	Branch::action (words);
      }
  }
};

class KwdBuildStrategy : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    int strategy = Cmt::get_current_build_strategy ();

    for (int i = 1; i < words.size (); i++)
      {
	const cmt_string& w = words[i];

	if (w == "prototypes")
	  {
	    strategy |= Prototypes;
	  }
	else if (w == "no_prototypes")
	  {
	    strategy |= NoPrototypes;
	  }
	else if (w == "keep_makefiles")
	  {
	    strategy |= KeepMakefiles;
	  }
	else if (w == "rebuild_makefiles")
	  {
	    strategy |= RebuildMakefiles;
	  }
        else if (w == "with_install_area")
          {
	    strategy |= WithInstallArea;
          }
        else if (w == "without_install_area")
          {
	    strategy |= WithoutInstallArea;
          }

	if ((Cmt::get_action () == action_show_strategies) && !Cmt::get_quiet ())
	  {
	    cout << "# Package " << use->get_package_name ()
		 << " adds " << w << " to build strategy" << endl;
	  }
      }

    Cmt::set_current_build_strategy (strategy);
  }
};

class KwdCleanupScript : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Script::action (words, CleanupScript, use);
    Symbol::action (words, CommandCleanupScript, use);
  }
};

class KwdCmtPathPattern : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& /*file_name*/,
	       int /*line_number*/)
  {
    CmtPathPattern::action (words, use);
  }
};

class KwdDocument : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    if (use == &(Use::current ()))
      {
	Constituent::action (Document, words);
      }
  }
};

class KwdIgnorePattern : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    IgnorePattern::action (words, use);
  }
};

class KwdIncludeDirs : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Include::action (words, use);
  }
};

class KwdIncludePath : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    if (words.size () > 1)
      {
	use->set_include_path (words[1]);
      }
  }
};

class KwdLanguage : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Language::action (words);
  }
};

class KwdLibrary : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    if (use == &(Use::current ()))
      {
	Constituent::action (Library, words);
      }
  }
};

class KwdMacro : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Symbol::action (words, CommandMacro, use);
  }
};

class KwdMacroPrepend : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Symbol::action (words, CommandMacroPrepend, use);
  }
};

class KwdMacroAppend : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Symbol::action (words, CommandMacroAppend, use);
  }
};

class KwdMacroRemove : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Symbol::action (words, CommandMacroRemove, use);
  }
};

class KwdMacroRemoveAll : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Symbol::action (words, CommandMacroRemoveAll, use);
  }
};

class KwdMakeFragment : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Fragment::action (words, use);
  }
};

class KwdManager : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    use->manager_action (words);
  }
};

class KwdPackage : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    /*
    if (words.size () > 1)
      {
	if (use == &(Use::current()))
	  {
	    m_current_package = words[1];
	    build_prefix (m_current_package, m_current_prefix);
	    
	    if ((use->get_package_name () != "") &&
		(use->get_package_name () != m_current_package))
	      {
		if (!m_quiet)
		  {
		    //  cout << "#CMT> package name mismatch in requirements of " <<
		    //  use->get_package_name () << " " <<
		    //  use->version << " line #" << line_number;
                    //  cout << " : " << m_current_package << " versus " <<
		    //  use->get_package_name () << endl;
		  }
	      }
	    
	    use->set (m_current_package,
		      m_current_version,
		      m_current_path,
		      "",
		      "");
	    
	    use->change_path (m_current_path);
	    use->style = m_current_style;
	  }
      }
    */
  }
};

class KwdPath : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Symbol::action (words, CommandPath, use);
  }
};

class KwdPathAppend : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Symbol::action (words, CommandPathAppend, use);
  }
};

class KwdPathPrepend : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Symbol::action (words, CommandPathPrepend, use);
  }
};

class KwdPathRemove : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Symbol::action (words, CommandPathRemove, use);
  }
};

class KwdPattern : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Pattern::action (words, use);
  }
};

class KwdPrivate : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Cmt::set_scope (ScopePrivate);
  }
};

class KwdProject : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Project::action (words, use);
  }
};

class KwdPublic : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Cmt::set_scope (ScopePublic);
  }
};

class KwdSet : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Symbol::action (words, CommandSet, use);
  }
};

class KwdSetAppend : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Symbol::action (words, CommandSetAppend, use);
  }
};

class KwdSetPrepend : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Symbol::action (words, CommandSetPrepend, use);
  }
};

class KwdSetRemove : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Symbol::action (words, CommandSetRemove, use);
  }
};

class KwdSetupScript : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Script::action (words, SetupScript, use);
    Symbol::action (words, CommandSetupScript, use);
  }
};

class KwdSetupStrategy : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    int strategy = Cmt::get_current_setup_strategy ();

    for (int i = 1; i < words.size (); i++)
      {
	const cmt_string& w = words[i];

	if (w == "config")
	  {
	    strategy |= SetupConfig;
	  }
	else if (w == "no_config")
	  {
	    strategy |= SetupNoConfig;
	  }
	else if (w == "root")
	  {
	    strategy |= SetupRoot;
	  }
	else if (w == "no_root")
	  {
	    strategy |= SetupNoRoot;
	  }
	else if (w == "cleanup")
	  {
	    strategy |= SetupCleanup;
	  }
	else if (w == "no_cleanup")
	  {
	    strategy |= SetupNoCleanup;
	  }
	
	if ((Cmt::get_action () == action_show_strategies) && !Cmt::get_quiet ())
	  {
	    cout << "# Package " << use->get_package_name ()
		 << " adds " << w << " to setup strategy" << endl;
	  }
      }

    Cmt::set_current_setup_strategy (strategy);
  }
};

class KwdTag : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Tag::action (words, use);
  }
};

class KwdTagExclude : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Tag::action_exclude (words, use);
  }
};

class KwdUse : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    Use::action (words, use);
  }
};

class KwdVersionStrategy : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    if (words.size () > 1)
      {
	const cmt_string& w = words[1];
	
	if (w == "best_fit")
	  {
	    Cmt::set_current_strategy (BestFit);
	  }
	else if (w == "best_fit_no_check")
	  {
	    Cmt::set_current_strategy (BestFitNoCheck);
	  }
	else if (w == "first_choice")
	  {
	    Cmt::set_current_strategy (FirstChoice);
	  }
	else if (w == "last_choice")
	  {
	    Cmt::set_current_strategy (LastChoice);
	  }
	else if (w == "keep_all")
	  {
	    Cmt::set_current_strategy (KeepAll);
	  }
	
	if ((Cmt::get_action () == action_show_strategies) && !Cmt::get_quiet ())
	  {
	    cout << "# Package " << use->get_package_name () <<
	      " sets version strategy to " << w << endl;
	  }
      }
  }
};

class KwdVersion : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
  }
};

class KwdDefault : public Kwd
{
public:
  void action (const CmtSystem::cmt_string_vector& words,
	       Use* use,
	       const cmt_string& file_name,
	       int line_number)
  {
    /*
      Unknown keyword : just ignore the line
    */
    if (!Cmt::get_quiet ())
      {
	cout << "#CMT> bad syntax in requirements of " << use->get_package_name ()
	     << " " << use->version << " line #" << line_number;
	cout << " [" << words[0] << "...]" << endl;
      }
    
    CmtError::set (CmtError::syntax_error, "ParseRequirements> ");
  }
};

SyntaxParser& SyntaxParser::instance ()
{
  static SyntaxParser p;

  return (p);
}

/**
 *  Parse the input file, rejecting comments and
 * rebuilding complete lines (from sections separated by
 *  \ characters.
 *
 *  Each reformatted line is parsed by filter_line
 */
void SyntaxParser::parse_requirements (const cmt_string& file_name, Use* use)
{
  SyntaxParser& me = instance ();
  me.do_parse_requirements (file_name, use);
}

/**
 *  Parse a text, rejecting comments and
 * rebuilding complete lines (from sections separated by
 *  \ characters.
 *
 *  Each reformatted line is parsed by filter_line
 */
void SyntaxParser::parse_requirements_text (const cmt_string& text,
					    const cmt_string& file_name,
					    Use* use)
{
  SyntaxParser& me = instance ();

    /**
     *
     *    We have to preserve m_current_access since it reflects whether
     *   the current cmt action is run in the context of the current package.
     *   (the opposite is when the cmt command specifies the current package
     *    in its arguments -use=... therefore the pwd is NOT the directory
     *    of the current package)
     *
     *   m_current_access is Developer when pwd =  current
     *                       User      when pwd != current
     *
     *    Therefore, as soon as we reach a used package, this must be switched to User
     *
     *   On the other hand, Cmt::scope reflects the status of the public/private 
     *  statements. By default, we are in public context when entering a new requirements
     *  file.
     *
     */

  AccessMode saved_current_access;
  ScopeType saved_scope;

  saved_current_access = Cmt::get_current_access ();
  saved_scope          = Cmt::get_scope ();

  if (use == 0) use = &(Use::current ());

  if (use != &(Use::current ()))
    {
      Cmt::set_current_access (UserMode);
    }
  else
    {
      Cmt::set_current_access (DeveloperMode);
    }

  Cmt::set_scope (ScopePublic);

  me.do_parse_requirements_text (text, file_name, use);

  Cmt::set_current_access (saved_current_access);
  Cmt::set_scope (saved_scope);
}

/**
 *  Apply the basic parser to one single line :
 *
 *   o Append to global text if previous back_slash
 *   o Split into words
 *   o Apply the generic Select operator
 */
void SyntaxParser::parse_requirements_line (const cmt_string& line,
					    Use* use,
					    const cmt_string& file_name,
					    int line_number)
{
  SyntaxParser& me = instance ();
  me.do_parse_requirements_line (line, use, file_name, line_number);
}

void SyntaxParser::parse (const CmtSystem::cmt_string_vector& words,
			  Use* use,
			  const cmt_string& file_name,
			  int line_number)
{
  SyntaxParser& me = instance ();
  me.do_parse (words, use, file_name, line_number);
}

SyntaxParser::SyntaxParser ()
{
  m_keywords.add ("alias", new KwdAlias ());
  m_keywords.add ("application", new KwdApplication ());
  m_keywords.add ("apply_pattern", new KwdApplyPattern ());
  m_keywords.add ("apply_tag", new KwdApplyTag ());
  m_keywords.add ("author", new KwdAuthor ());
  m_keywords.add ("branches", new KwdBranches ());
  m_keywords.add ("build_strategy", new KwdBuildStrategy ());
  m_keywords.add ("cleanup_script", new KwdCleanupScript ());
  m_keywords.add ("cmtpath_pattern", new KwdCmtPathPattern ());
  m_keywords.add ("document", new KwdDocument ());
  m_keywords.add ("ignore_pattern", new KwdIgnorePattern ());
  m_keywords.add ("include_dirs", new KwdIncludeDirs ());
  m_keywords.add ("include_path", new KwdIncludePath ());
  m_keywords.add ("language", new KwdLanguage ());
  m_keywords.add ("library", new KwdLibrary ());
  m_keywords.add ("macro", new KwdMacro ());
  m_keywords.add ("macro+", new KwdMacroAppend ());
  m_keywords.add ("macro_prepend", new KwdMacroPrepend ());
  m_keywords.add ("macro_append", new KwdMacroAppend ());
  m_keywords.add ("macro_remove", new KwdMacroRemove ());
  m_keywords.add ("macro_remove_all", new KwdMacroRemoveAll ());
  m_keywords.add ("make_fragment", new KwdMakeFragment ());
  m_keywords.add ("manager", new KwdManager ());
  m_keywords.add ("package", new KwdPackage ());
  m_keywords.add ("path", new KwdPath ());
  m_keywords.add ("path_append", new KwdPathAppend ());
  m_keywords.add ("path_prepend", new KwdPathPrepend ());
  m_keywords.add ("path_remove", new KwdPathRemove ());
  m_keywords.add ("pattern", new KwdPattern ());
  m_keywords.add ("public", new KwdPublic ());
  m_keywords.add ("private", new KwdPrivate ());
  m_keywords.add ("project", new KwdProject ());
  m_keywords.add ("set", new KwdSet ());
  m_keywords.add ("set_append", new KwdSetAppend ());
  m_keywords.add ("set_prepend", new KwdSetPrepend ());
  m_keywords.add ("set_remove", new KwdSetRemove ());
  m_keywords.add ("setup_script", new KwdSetupScript ());
  m_keywords.add ("setup_strategy", new KwdSetupStrategy ());
  m_keywords.add ("tag", new KwdTag ());
  m_keywords.add ("tag_exclude", new KwdTagExclude ());
  m_keywords.add ("use", new KwdUse ());
  m_keywords.add ("version_strategy", new KwdVersionStrategy ());
  m_keywords.add ("version", new KwdVersion ());
}

void SyntaxParser::do_parse (const CmtSystem::cmt_string_vector& words,
			     Use* use,
			     const cmt_string& file_name,
			     int line_number)
{
  CmtError::clear ();

  if (words.size () == 0) return;

  const cmt_string& command = words[0];

  if (command.size () == 0) return;

  //
  // First analyze the syntax
  //

  Kwd* keyword = m_keywords.find (command);
  if (keyword == 0)
    {
      CmtError::set (CmtError::syntax_error, "ParseRequirements> ");
    }

  if (CmtError::has_pending_error ())
    {
      if (!Cmt::get_quiet ())
        {
          cout << "#CMT> bad syntax in requirements of " << use->get_package_name ()
               << " " << use->version 
               << " " << use->specified_path 
               << " line #" << line_number;
          cout << " [" << command << " ...]" << endl;
        }

      return;
    }

  //
  // Then interpret the action
  //

  keyword->action (words, use, file_name, line_number);
}

void SyntaxParser::do_parse_requirements (const cmt_string& file_name, Use* use)
{
  cmt_string actual_file_name = file_name;
  cmt_string text;

  CmtError::clear ();

  if (!CmtSystem::test_file (actual_file_name))
    {
      actual_file_name = "..";
      actual_file_name += CmtSystem::file_separator ();
      actual_file_name += "cmt";
      actual_file_name += CmtSystem::file_separator ();
      actual_file_name += file_name;

      if (!CmtSystem::test_file (actual_file_name))
        {
          actual_file_name = "..";
          actual_file_name += CmtSystem::file_separator ();
          actual_file_name += "mgr";
          actual_file_name += CmtSystem::file_separator ();
          actual_file_name += file_name;

          if (!CmtSystem::test_file (actual_file_name))
            {
              return;
            }
        }
    }

  text.read (actual_file_name);

  SyntaxParser::parse_requirements_text (text, actual_file_name, use);

    //Pattern::apply_all_globals (use);
}

void SyntaxParser::do_parse_requirements_line (const cmt_string& line,
					       Use* use,
					       const cmt_string& file_name,
					       int line_number)
{
  int length;
  int nl;
  int back_slash;
  cmt_string temp_line = line;

  if (temp_line.size () == 0) return;
  if (temp_line[0] == '#') return;

  nl = temp_line.find_last_of ('\n');
  if (nl != cmt_string::npos) temp_line.erase (nl);

  length = temp_line.size ();
  if (length == 0) return;

  //
  // We scan the line for handling backslashes.
  //
  // o Really terminating backslashes (ie those only followed by spaces/tabs
  // mean continued line
  //
  //

  bool finished = true;

  length = temp_line.size ();

  back_slash = temp_line.find_last_of ('\\');

  if (back_slash != cmt_string::npos)
    {
      //
      // This is the last backslash
      // check if there are only space chars after it
      //
      
      bool at_end = true;

      for (int i = (back_slash + 1); i < length; i++)
        {
          char c = temp_line[i];
          if ((c != ' ') && (c != '\t'))
            {
              at_end = false;
              break;
            }
        }

      if (at_end)
        {
          temp_line.erase (back_slash);
          finished = false;
        }
      else
        {
          // This was not a trailing backslash.
          finished = true;
        }
    }

  m_filtered_text += temp_line;

  if (!finished)
    {
      // We still need to accumulate forthcoming lines
      // before parsing the resulting text.
      return;
    }

  /*
    Here a full line (possibly accumulating several lines
    ended by backslashes) is parsed :
    
    o Special characters are filtered now :
    
    <cmt:tab/>  \t
    <cmt:cr/>   \r
    <cmt:lf/>   \n
    
    o Split into words (a word is a string not containing
    spaces or enclosed in quotes)

    o Parse the word array (function Select)

  */

  m_filtered_text.replace_all ("<cmt:tab/>", "\t");
  m_filtered_text.replace_all ("<cmt:cr/>",  "\r");
  m_filtered_text.replace_all ("<cmt:lf/>",  "\n");

  if (Cmt::get_debug ())
    {
      cout << "parse_requirements_line [" << m_filtered_text << "]" << endl;
    }
  
  static CmtSystem::cmt_string_vector words;
  
  CmtSystem::split (m_filtered_text, " \t", words);
  
  if (words.size () != 0)
    {
      static SyntaxParser& parser = SyntaxParser::instance ();

      parser.parse (words, use, file_name, line_number);
    }
  
  m_filtered_text.erase (0);
}

/**
 *  Parse a text, rejecting comments and
 * rebuilding complete lines (from sections separated by
 *  \ characters.
 *
 *  Each reformatted line is parsed by filter_line
 */
void SyntaxParser::do_parse_requirements_text (const cmt_string& text,
					       const cmt_string& file_name,
					       Use* use)
{
  cmt_string line;
  int pos;
  int max_pos;
  int line_number = 1;

  if (use == 0) use = &(Use::current ());

  m_filtered_text.erase (0);

  pos = 0;
  max_pos = text.size ();

  for (pos = 0; pos < max_pos;)
    {
      int cr = text.find (pos, "\r\n");
      int nl = text.find (pos, '\n');
      int first = nl;
      int length = 1;

      if (cr != cmt_string::npos)
        {
          if (nl == cmt_string::npos)
            {
              first = cr;
              length = 2;
            }
          else
            {
              first = (nl < cr) ? nl : cr;
              length = (nl < cr) ? 1 : 2;
            }
        }

      if (first == cmt_string::npos)
        {
          text.substr (pos, line);
          pos = max_pos;
        }
      else if (first > pos)
        {
          text.substr (pos, first - pos, line);
          pos = first + length;
        }
      else
        {
          line.erase (0);
          pos += length;
        }

      parse_requirements_line (line, use, file_name, line_number);

      if ((Cmt::get_action () == action_check_configuration) && CmtError::has_pending_error ())
        {
          break;
        }

      line_number++;
    }
}




/*

class Cmd
{
public:
  virtual void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments) = 0;
}

class CmdAwk : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
    argc--;
    argv++;
    while (argc > 1)
      {
	cmt_string& s = arguments.add ();
	s = argv[1];
	argc--;
	argv++;
      }

    m_action = action_awk;
  }
}

class CmdBroadcast : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
    argc--;
    argv++;
    while (argc > 1)
      {
	cmt_string& s = arguments.add ();
	s = argv[1];
	argc--;
	argv++;
      }

    m_action = action_broadcast;
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

class Cmd : public Cmd
{
public:
  void action (int argc, char* argv[], CmtSystem::cmt_string_vector& arguments)
  {
  }
}

*/

CommandParser::HelpMap& CommandParser::get_help ()
{
  static CommandParser& me = instance ();

  return (me.m_help);
}

CommandParser::HelpTexts& CommandParser::get_help_texts ()
{
  static CommandParser& me = instance ();

  return (me.m_help_texts);
}

const cmt_string& CommandParser::get_help_text (ActionType key)
{
  static const HelpTexts& help = get_help_texts ();

  const cmt_string& h = help[key];
  return (h);
}

void CommandParser::show_all ()
{
  static HelpTexts& help_texts = get_help_texts ();

  cout << "> cmt command [option...]" << endl;
  cout << " command :" << endl;

  int i;

  for (i = 0; ; i++)
    {
      const cmt_string& s = help_texts[i];
      if (s == "") break;
      cout << "   " << s << endl;
    }

  cout << " global options :" << endl;

  cout << "   -quiet                  : don't print errors" << endl;
  cout << "   -use=<p>:<v>:<path>     : set package version path" << endl;
  cout << "   -pack=<package>         : set package" << endl;
  cout << "   -version=<version>      : set version" << endl;
  cout << "   -path=<path>            : set root path" << endl;
  cout << "   -f=<requirement-file>   : set input file" << endl;
  cout << "   -e=<statement>          : add a one line statement" << endl;
  cout << "   -tag=<tag-list>         : select a new tag-set" << endl;
  cout << "   -tag_add=<tag-list>     : add specific comma-separated tag(s)" << endl;
  cout << "   -tag_remove=<tag-list>  : remove specific comma-separated tag(s)" << endl;
  cout << "   -with_version_directory : reset to default structuring style" << endl;
  cout << "   -without_version_directory : switch structuring style" << endl;
  cout << "   -cleanup                : activate install area cleanup" << endl;
  cout << "   -no_cleanup             : inhibit install area cleanup" << endl;
}

void CommandParser::show (ActionType action)
{
  static HelpTexts& help_texts = get_help_texts ();

  if (action == action_build)
    {
      int i;

      for (i = action_build_constituent_makefile; i <= action_build_windefs; i++)
	{
	  const cmt_string& s = help_texts[i];
	  cout << "   " << s << endl;
	}
    }
  if (action == action_check)
    {
      int i;

      for (i = action_check_configuration; i <= action_check_version; i++)
	{
	  const cmt_string& s = help_texts[i];
	  cout << "   " << s << endl;
	}
    }
  else if (action == action_show)
    {
      int i;

      for (i = action_show_all_tags; i <= action_show_versions; i++)
	{
	  const cmt_string& s = help_texts[i];
	  cout << "   " << s << endl;
	}
    }
  else
    {
      const cmt_string& s = get_help_text (action);
      cout << s << endl;
    }
}

CommandParser& CommandParser::instance ()
{
  static CommandParser me;
  return (me);
}

CommandParser::CommandParser ()
{
  static HelpMap& help = m_help;

  static HelpTexts& help_texts = m_help_texts;

  help_texts.clear ();

  help_texts.add () =  "none";
  help_texts.add () =  "awk";
  help_texts.add () =  "broadcast [-select=list] [-exclude=list] [-local] [-global] [-begin=pattern] [-depth=n] <command> : apply a command to [some of] the used packages";
  help_texts.add () =  "build <option>          : build actions. (Try cmt help build)";
  help_texts.add () =  "build constituent_makefile <constituent>  : generate constituent Makefile fragment";
  help_texts.add () =  "build constituents_makefile : generate constituents.make";
  help_texts.add () =  "build dependencies      : generate dependencies";
  help_texts.add () =  "build library_links     : build symbolic links towards all imported libraries";
  help_texts.add () =  "build make_setup        : build a compiled version of setup scripts";
  help_texts.add () =  "build msdev             : generate MSDEV files";
  help_texts.add () =  "build CMT_pacman        : generate PACMAN manifest file for CMT";
  help_texts.add () =  "build vsnet             : generate VS.NET files";
  help_texts.add () =  "build os9_makefile      : generate Makefile for OS9";
  help_texts.add () =  "build prototype         : generate prototype file";
  help_texts.add () =  "build readme            : generate README.html";
  help_texts.add () =  "build tag_makefile      : generate tag specific Makefile";
  help_texts.add () =  "build temporary_name    : generate a name for a temprary file";
  help_texts.add () =  "build triggers <constituent> : generate library trigger file";
  help_texts.add () =  "build windefs <library_name> : generate def file for Windows shared libraries";
  help_texts.add () =  "check <option>          : check actions. (Try cmt help check)";
  help_texts.add () =  "check configuration     : check configuration";
  help_texts.add () =  "check files <old> <new> : compare two files and overrides <old> by <new> if different";
  help_texts.add () =  "check version <name>    : check if a name follows a version tag syntax ";
  help_texts.add () =  "co | checkout           : perform a cvs checkout over a CMT package";
  help_texts.add () =  "cleanup [-csh|-sh|-bat] : generate a cleanup script";
  help_texts.add () =  "config                  : generate setup and cleanup scripts";
  help_texts.add () =  "create <package> <version> [<path>] : create and configure a new package";
  help_texts.add () =  "cvsbranches <module>      : display the subdirectories for a module";
  help_texts.add () =  "cvssubpackagess <module>  : display the subpackages for a module";
  help_texts.add () =  "cvstags <module>          : display the CVS tags for a module";
  help_texts.add () =  "expand model <model>    : ";
  help_texts.add () =  "filter <in> <out>       : filter a file against CMT macros and env. variables";
  help_texts.add () =  "help | -help | --help   : display this help";
  help_texts.add () =  "load";
  help_texts.add () =  "lock [<p> <v> [<path>]] : lock a package";
  help_texts.add () =  "remove <package> <version> [<path>] : remove a package version";
  help_texts.add () =  "remove library_links    : remove symbolic links towards all imported libraries";
  help_texts.add () =  "run '<command>'         : apply a command";
  help_texts.add () =  "run_sequence <sequence file> : execute a cmt equence file";
  help_texts.add () =  "set version <version>   : generate a version file in the current package";
  help_texts.add () =  "set versions            : generate version files into packages";
  help_texts.add () =  "setup [-csh|-sh|-bat]   : generate a setup script";
  help_texts.add () =  "show <option>           : query actions. (Try cmt help show)";
  help_texts.add () =  "show  all_tags          :  all defined tags";
  help_texts.add () =  "show  applied_patterns  :  all patterns actually applied";
  help_texts.add () =  "show  author            :  package author";
  help_texts.add () =  "show  branches          :  added branches";
  help_texts.add () =  "show  clients           :  package clients";
  help_texts.add () =  "show  cmtpath_patterns  :  cmtpath_patterns";
  help_texts.add () =  "show  constituent <name>:  constituent definition";
  help_texts.add () =  "show  constituent_names :  constituent names";
  help_texts.add () =  "show  constituents      :  constituent definitions";
  help_texts.add () =  "show  cycles            :  cycles in the use graph";
  help_texts.add () =  "show  fragment <name>   :  one fragment definition";
  help_texts.add () =  "show  fragments         :  fragment definitions";
  help_texts.add () =  "show  groups            :  group definitions";
  help_texts.add () =  "show  include_dirs      :  ";
  help_texts.add () =  "show  language <name>   :  language definition";
  help_texts.add () =  "show  languages         :  language definitions";
  help_texts.add () =  "show  macro <name>      :  a formatted macro definition";
  help_texts.add () =  "show  macro_value <name>  :  a raw macro definition";
  help_texts.add () =  "show  macro_names       :  all macro names";
  help_texts.add () =  "show  macros            :  all macro definitions";
  help_texts.add () =  "show  manager           :  package manager";
  help_texts.add () =  "show  packages          :  packages reachable from the current context";
  help_texts.add () =  "show  path              :  the package search list";
  help_texts.add () =  "show  pattern <name>    :  the pattern definition and usages";
  help_texts.add () =  "show  pattern_names     :  pattern names";
  help_texts.add () =  "show  patterns          :  the pattern definitions";
  help_texts.add () =  "show  projects          :  project definitions";
  help_texts.add () =  "show  pwd               :  filtered current directory";
  help_texts.add () =  "show  set <name>        :  a formatted set definition";
  help_texts.add () =  "show  set_names         :  set names";
  help_texts.add () =  "show  set_value <name>  :  a raw set definition";
  help_texts.add () =  "show  sets              :  set definitions";
  help_texts.add () =  "show  strategies        :  all strategies (build & version)";
  help_texts.add () =  "show  tags              :  all currently active tags";
  help_texts.add () =  "show  use_paths <pack>  :  all paths to the used package";
  help_texts.add () =  "show  uses              :  used packages";
  help_texts.add () =  "show  version           :  version of the current package";
  help_texts.add () =  "show  versions <name>   :  visible versions of the selected package";
  help_texts.add () =  "system                  : display the system tag";
  help_texts.add () =  "unlock [<p> <v> [<path>]] : unlock a package";
  help_texts.add () =  "version                 : version of CMT";
  help_texts.add () =  "";

  //"build <key>             : build various components :"
  //"show <key>              : display various infos on :"

  help.add (action_none, help_texts[action_none]);
  help.add (action_awk, help_texts[action_awk]);
  help.add (action_broadcast, help_texts[action_broadcast]);
  help.add (action_build, help_texts[action_build]);
  help.add (action_build_constituent_makefile, help_texts[action_build_constituent_makefile]);
  help.add (action_build_constituents_makefile, help_texts[action_build_constituents_makefile]);
  help.add (action_build_dependencies, help_texts[action_build_dependencies]);
  help.add (action_build_library_links, help_texts[action_build_library_links]);
  help.add (action_build_make_setup, help_texts[action_build_make_setup]);
  help.add (action_build_msdev, help_texts[action_build_msdev]);
  help.add (action_build_CMT_pacman, help_texts[action_build_CMT_pacman]);
  help.add (action_build_vsnet, help_texts[action_build_vsnet]);
  help.add (action_build_os9_makefile, help_texts[action_build_os9_makefile]);
  help.add (action_build_prototype, help_texts[action_build_prototype]);
  help.add (action_build_readme, help_texts[action_build_readme]);
  help.add (action_build_tag_makefile, help_texts[action_build_tag_makefile]);
  help.add (action_build_temporary_name, help_texts[action_build_temporary_name]);
  help.add (action_build_triggers, help_texts[action_build_triggers]);
  help.add (action_build_windefs, help_texts[action_build_windefs]);
  help.add (action_check_configuration, help_texts[action_check_configuration]);
  help.add (action_check_files, help_texts[action_check_files]);
  help.add (action_check_version, help_texts[action_check_version]);
  help.add (action_checkout, help_texts[action_checkout]);
  help.add (action_cleanup, help_texts[action_cleanup]);
  help.add (action_config, help_texts[action_config]);
  help.add (action_create, help_texts[action_create]);
  help.add (action_cvsbranches, help_texts[action_cvsbranches]);
  help.add (action_cvssubpackages, help_texts[action_cvssubpackages]);
  help.add (action_cvstags, help_texts[action_cvstags]);
  help.add (action_expand_model, help_texts[action_expand_model]);
  help.add (action_filter, help_texts[action_filter]);
  help.add (action_help, help_texts[action_help]);
  help.add (action_load, help_texts[action_load]);
  help.add (action_lock, help_texts[action_lock]);
  help.add (action_remove, help_texts[action_remove]);
  help.add (action_remove_library_links, help_texts[action_remove_library_links]);
  help.add (action_run, help_texts[action_run]);
  help.add (action_run_sequence, help_texts[action_run_sequence]);
  help.add (action_set_version, help_texts[action_set_version]);
  help.add (action_set_versions, help_texts[action_set_versions]);
  help.add (action_setup, help_texts[action_setup]);
  help.add (action_show, help_texts[action_show]);
  help.add (action_show_all_tags, help_texts[action_show_all_tags]);
  help.add (action_show_applied_patterns, help_texts[action_show_applied_patterns]);
  help.add (action_show_author, help_texts[action_show_author]);
  help.add (action_show_branches, help_texts[action_show_branches]);
  help.add (action_show_clients, help_texts[action_show_clients]);
  help.add (action_show_cmtpath_patterns, help_texts[action_show_cmtpath_patterns]);
  help.add (action_show_constituent, help_texts[action_show_constituent]);
  help.add (action_show_constituent_names, help_texts[action_show_constituent_names]);
  help.add (action_show_constituents, help_texts[action_show_constituents]);
  help.add (action_show_cycles, help_texts[action_show_cycles]);
  help.add (action_show_fragment, help_texts[action_show_fragment]);
  help.add (action_show_fragments, help_texts[action_show_fragments]);
  help.add (action_show_groups, help_texts[action_show_groups]);
  help.add (action_show_include_dirs, help_texts[action_show_include_dirs]);
  help.add (action_show_language, help_texts[action_show_language]);
  help.add (action_show_languages, help_texts[action_show_languages]);
  help.add (action_show_macro, help_texts[action_show_macro]);
  help.add (action_show_macro_value, help_texts[action_show_macro_value]);
  help.add (action_show_macro_names, help_texts[action_show_macro_names]);
  help.add (action_show_macros, help_texts[action_show_macros]);
  help.add (action_show_manager, help_texts[action_show_manager]);
  help.add (action_show_packages, help_texts[action_show_packages]);
  help.add (action_show_path, help_texts[action_show_path]);
  help.add (action_show_pattern, help_texts[action_show_pattern]);
  help.add (action_show_pattern_names, help_texts[action_show_pattern_names]);
  help.add (action_show_patterns, help_texts[action_show_patterns]);
  help.add (action_show_projects, help_texts[action_show_projects]);
  help.add (action_show_pwd, help_texts[action_show_pwd]);
  help.add (action_show_set, help_texts[action_show_set]);
  help.add (action_show_set_names, help_texts[action_show_set_names]);
  help.add (action_show_set_value, help_texts[action_show_set_value]);
  help.add (action_show_sets, help_texts[action_show_sets]);
  help.add (action_show_strategies, help_texts[action_show_strategies]);
  help.add (action_show_tags, help_texts[action_show_tags]);
  help.add (action_show_use_paths, help_texts[action_show_use_paths]);
  help.add (action_show_uses, help_texts[action_show_uses]);
  help.add (action_show_version, help_texts[action_show_version]);
  help.add (action_show_versions, help_texts[action_show_versions]);
  help.add (action_system, help_texts[action_system]);
  help.add (action_unlock, help_texts[action_unlock]);
  help.add (action_version, help_texts[action_version]);
}