Base64.h

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/*
===========================================================================

Doom 3 GPL Source Code
Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company. 

This file is part of the Doom 3 GPL Source Code (?Doom 3 Source Code?).  

Doom 3 Source Code 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 3 of the License, or
(at your option) any later version.

Doom 3 Source Code is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Doom 3 Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/

#ifndef __BASE64_H__
#define __BASE64_H__

/*
===============================================================================

        base64

===============================================================================
*/

class idBase64 {
public:
                                idBase64( void );
                                idBase64( const idStr &s );
                                ~idBase64( void );

        void            Encode( const byte *from, int size );
        void            Encode( const idStr &src );
        int                     DecodeLength( void ) const; // minimum size in bytes of destination buffer for decoding
        int                     Decode( byte *to ) const; // does not append a \0 - needs a DecodeLength() bytes buffer
        void            Decode( idStr &dest ) const; // decodes the binary content to an idStr (a bit dodgy, \0 and other non-ascii are possible in the decoded content)
        void            Decode( idFile *dest ) const;

        const char      *c_str() const;

        void            operator=( const idStr &s );

private:
        byte *          data;
        int                     len;
        int                     alloced;

        void            Init( void );
        void            Release( void );
        void            EnsureAlloced( int size );
};

ID_INLINE idBase64::idBase64( void ) {
        Init();
}

ID_INLINE idBase64::idBase64( const idStr &s ) {
        Init();
        *this = s;
}

ID_INLINE idBase64::~idBase64( void ) {
        Release();
}

ID_INLINE const char *idBase64::c_str( void ) const {
        return (const char *)data;
}

ID_INLINE void idBase64::Init( void ) {
        len = 0;
        alloced = 0;
        data = NULL;
}

ID_INLINE void idBase64::Release( void ) {
        if ( data ) {
                delete[] data;
        }
        Init();
}

ID_INLINE void idBase64::EnsureAlloced( int size ) {
        if ( size > alloced ) {
                Release();
        }
        data = new byte[size];
        alloced = size;
}

ID_INLINE void idBase64::operator=( const idStr &s ) {
        EnsureAlloced( s.Length()+1 ); // trailing \0 - beware, this does a Release
        strcpy( (char *)data, s.c_str() );
        len = s.Length();
}

#endif /* !__BASE64_H__ */