util.h

/*
  Copyright (c) 2007-2009 by Jakob Schroeter <js@camaya.net>
  This file is part of the gloox library. http://camaya.net/gloox

  This software is distributed under a license. The full license
  agreement can be found in the file LICENSE in this distribution.
  This software may not be copied, modified, sold or distributed
  other than expressed in the named license agreement.

  This software is distributed without any warranty.
*/

#ifndef UTIL_H__
#define UTIL_H__

#include "gloox.h"

#include <cmath>
#include <algorithm>
#include <string>
#include <list>
#include <map>

namespace gloox
{

  namespace util
  {

    #define lookup( a, b ) _lookup( a, b, sizeof(b)/sizeof(char*) )
    #define lookup2( a, b ) _lookup2( a, b, sizeof(b)/sizeof(char*) )
    #define deflookup( a, b, c ) _lookup( a, b, sizeof(b)/sizeof(char*), c )
    #define deflookup2( a, b, c ) _lookup2( a, b, sizeof(b)/sizeof(char*), c )

    GLOOX_API unsigned _lookup( const std::string& str, const char* values[],
                      unsigned size, int def = -1 );

    GLOOX_API const std::string _lookup( unsigned code, const char* values[],
                               unsigned size, const std::string& def = EmptyString );

    GLOOX_API unsigned _lookup2( const std::string& str, const char* values[],
                              unsigned size, int def = -1 );

    GLOOX_API const std::string _lookup2( unsigned code, const char* values[],
                                unsigned size, const std::string& def = EmptyString );

    template< typename T, typename F >
    inline void ForEach( T& t, F f )
    {
      for( typename T::iterator it = t.begin(); it != t.end(); ++it )
        ( (*it)->*f )();
    }

    template< typename T, typename F, typename D >
    inline void ForEach( T& t, F f, D& d )
    {
      for( typename T::iterator it = t.begin(); it != t.end(); ++it )
        ( (*it)->*f )( d );
    }

    template< typename T, typename F, typename D1, typename D2 >
    inline void ForEach( T& t, F f, D1& d1, D2& d2 )
    {
      for( typename T::iterator it = t.begin(); it != t.end(); ++it )
        ( (*it)->*f )( d1, d2 );
    }

    template< typename T, typename F, typename D1, typename D2, typename D3 >
    inline void ForEach( T& t, F f, D1& d1, D2& d2, D3& d3 )
    {
      for( typename T::iterator it = t.begin(); it != t.end(); ++it )
        ( (*it)->*f )( d1, d2, d3 );
    }

    template< typename T >
    inline void clearList( std::list< T* >& L )
    {
      typename std::list< T* >::iterator it = L.begin();
      typename std::list< T* >::iterator it2;
      while( it != L.end() )
      {
        it2 = it++;
        delete (*it2);
        L.erase( it2 );
      }
    }

    template< typename Key, typename T >
    inline void clearMap( std::map< Key, T* >& M )
    {
      typename std::map< Key, T* >::iterator it = M.begin();
      typename std::map< Key, T* >::iterator it2;
      while( it != M.end() )
      {
        it2 = it++;
        delete (*it2).second;
        M.erase( it2 );
      }
    }

    template< typename Key, typename T >
    inline void clearMap( std::map< const Key, T* >& M )
    {
      typename std::map< const Key, T* >::iterator it = M.begin();
      typename std::map< const Key, T* >::iterator it2;
      while( it != M.end() )
      {
        it2 = it++;
        delete (*it2).second;
        M.erase( it2 );
      }
    }

    GLOOX_API const std::string escape( std::string what );

    GLOOX_API bool checkValidXMLChars( const std::string& data );

    GLOOX_API int internalLog2( unsigned int n );

    GLOOX_API void replaceAll( std::string& target, const std::string& find, const std::string& replace );

    static inline const std::string long2string( long int value, const int base = 10 )
    {
      int add = 0;
      if( base < 2 || base > 16 || value == 0 )
        return "0";
      else if( value < 0 )
      {
        ++add;
        value = -value;
      }
      int len = static_cast<int>( ( log( static_cast<double>( value ? value : 1 ) ) / log( static_cast<double>( base ) ) ) + 1 );
      const char digits[] = "0123456789ABCDEF";
      char* num = static_cast<char*>( calloc( len + 1 + add, sizeof( char ) ) );
      num[len--] = '\0';
      if( add )
        num[0] = '-';
      while( value && len > -1 )
      {
        num[len-- + add] = digits[static_cast<int>( value % base )];
        value /= base;
      }
      const std::string result( num );
      free( num );
      return result;
    }

    static inline const std::string int2string( int value )
    {
      return long2string( value );
    }

  }

}

#endif // UTIL_H__