/**

 * $Id: util.c,v 1.4 2006-03-20 11:58:37 nkeynes Exp $

 *

 * Miscellaneous utility functions.

 *

 * Copyright (c) 2005 Nathan Keynes.

 *

 * This program 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.

 *

 * This program 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.

 */

#include "dream.h"

void fwrite_string( char *s, FILE *f )

{

    uint32_t len = 0;

    if( s == NULL ) {

	fwrite( &len, sizeof(len), 1, f );

    } else {

	len = strlen(s)+1;

	fwrite( &len, sizeof(len), 1, f );

	fwrite( s, len, 1, f );

    }

}

int fread_string( char *s, int maxlen, FILE *f ) 

{

    uint32_t len;

    fread( &len, sizeof(len), 1, f );

    if( len != 0 ) {

	fread( s, len > maxlen ? maxlen : len, 1, f );

    }

    return len;

}

void fwrite_dump( unsigned char *data, unsigned int length, FILE *f ) 

{

    unsigned int i, j;

    for( i =0; i<length; i+=16 ) {

	fprintf( f, "%08X:", i);

	for( j=i; j<i+16; j++ ) {

	    if( (j % 4) == 0 )

		fprintf( f, " " );

	    if( j < length )

		fprintf( f, " %02X", (unsigned int)(data[j]) );

	    else

		fprintf( f, "   " );

	}

	fprintf( f, "  " );

	for( j=i; j<i+16 && j<length; j++ ) {

	    fprintf( f, "%c", isprint(data[j]) ? data[j] : '.' );

	}

	fprintf( f, "\n" );

    }

}