searchpath.hpp

Go to the documentation of this file.

/*
  SEARCHPATH.hpp  -  helpers for searching directory lists and locating modules
 
   Copyright (C)
     2011,            Hermann Vosseler <Ichthyostega@web.de>
 
 **Lumiera** is free software; you can redistribute it and/or modify it
 under the terms of the GNU General Public License as published by the
 Free Software Foundation; either version 2 of the License, or (at your
 option) any later version. See the file COPYING for further details.
 
*/
 
 
#ifndef COMMON_SEARCHPATH_H
#define COMMON_SEARCHPATH_H
 
#include "lib/error.hpp"
#include "lib/nocopy.hpp"
#include "lib/regex.hpp"
#include "lib/file.hpp"
 
#include <string>
#include <boost/algorithm/string.hpp>
 
 
namespace lib {
  namespace error = lumiera::error;
  
  using std::string;
  
  using SubMatch = std::smatch::value_type const&;
  
  
  using LERR_(ITER_EXHAUST);
  
  
  fs::path findExePath();
  
  string replaceMagicLinkerTokens (string const& src);
  
  
  class SearchPathSplitter
    : public util::RegexSearchIter
    {
      static const regex ACCEPT_PATHELEMENT;
      
    public:
      SearchPathSplitter() = default;
      SearchPathSplitter (string& searchPath)         
        : RegexSearchIter{searchPath, ACCEPT_PATHELEMENT}
        { }
      
      LIFT_PARENT_INCREMENT_OPERATOR (std::sregex_iterator);
      ENABLE_USE_IN_STD_RANGE_FOR_LOOPS (SearchPathSplitter);
      
      using value_type = std::string;
      using reference = value_type&;
      using pointer =   value_type*;
      
      string
      operator*()  const
        {
          if (!isValid())
            throw error::Logic ("Search path exhausted."
                               ,LERR_(ITER_EXHAUST));
          
          string pathElm = util::RegexSearchIter::operator*()[2];
          pathElm = boost::algorithm::trim_right_copy(pathElm);
          return replaceMagicLinkerTokens (pathElm);
        }
    };
  
  
  
  string resolveModulePath (fs::path moduleName, string searchPath = "");
  
  
  
} // namespace lib
#endif