//  This may look like C code, but it is really -*- C++ -*-

//  ------------------------------------------------------------------
//  The Goldware Library
//  Copyright (C) 1990-1999 Odinn Sorensen
//  Copyright (C) 1999-2000 Alexander S. Aganichev
//  ------------------------------------------------------------------
//  This library is free software; you can redistribute it and/or
//  modify it under the terms of the GNU Library General Public
//  License as published by the Free Software Foundation; either
//  version 2 of the License, or (at your option) any later version.
//
//  This library 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
//  Library General Public License for more details.
//
//  You should have received a copy of the GNU Library General Public
//  License along with this program; if not, write to the Free
//  Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
//  MA 02111-1307, USA
//  ------------------------------------------------------------------
//  $Id$
//  ------------------------------------------------------------------
//  CRC-16, CRC-32 and Hashing
//  ------------------------------------------------------------------

#include <gctype.h>
#include <gcrcall.h>


//  ------------------------------------------------------------------
//  Generate CRC-16 of a normal nul-terminated string

word strCrc16(const char* s, bool __case, word mask)
{

    word crc = mask;

    if(__case)
    {
        while(*s)
            crc = updCrc16(g_toupper(*s++), crc);
    }
    else
    {
        while(*s)
            crc = updCrc16(*s++, crc);
    }

    return crc;
}


//  ------------------------------------------------------------------
//  Generate bugfree CRC-16 of a normal nul-terminated string

word strCrc16c(const char* s, bool __case, word mask)
{

    word crc = mask;

    if(__case)
    {
        while(*s)
            crc = updCrc16c(g_toupper(*s++), crc);
    }
    else
    {
        while(*s)
            crc = updCrc16c(*s++, crc);
    }

    return crc;
}


//  ------------------------------------------------------------------

#ifdef TEST
#include <stdio.h>
int main(int argc, char**argv)
{
    for ( int c=1; c<argc; c++ )
        printf( "%s CRC16 0x%04X\n", argv[c], strCrc16(argv[c]) );
}
#endif
