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lxdream.org :: lxdream/src/util.c
lxdream 0.9.1
released Jun 29
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filename src/util.c
changeset 117:3b6a128ae733
prev35:21a4be098304
next187:f6ce97841afc
author nkeynes
date Mon Mar 20 11:58:37 2006 +0000 (14 years ago)
permissions -rw-r--r--
last change Add an fwrite_dump() method to do a binary block dump
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     1 /**
     2  * $Id: util.c,v 1.4 2006-03-20 11:58:37 nkeynes Exp $
     3  *
     4  * Miscellaneous utility functions.
     5  *
     6  * Copyright (c) 2005 Nathan Keynes.
     7  *
     8  * This program is free software; you can redistribute it and/or modify
     9  * it under the terms of the GNU General Public License as published by
    10  * the Free Software Foundation; either version 2 of the License, or
    11  * (at your option) any later version.
    12  *
    13  * This program is distributed in the hope that it will be useful,
    14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    16  * GNU General Public License for more details.
    17  */
    19 #include "dream.h"
    21 void fwrite_string( char *s, FILE *f )
    22 {
    23     uint32_t len = 0;
    24     if( s == NULL ) {
    25 	fwrite( &len, sizeof(len), 1, f );
    26     } else {
    27 	len = strlen(s)+1;
    28 	fwrite( &len, sizeof(len), 1, f );
    29 	fwrite( s, len, 1, f );
    30     }
    31 }
    33 int fread_string( char *s, int maxlen, FILE *f ) 
    34 {
    35     uint32_t len;
    36     fread( &len, sizeof(len), 1, f );
    37     if( len != 0 ) {
    38 	fread( s, len > maxlen ? maxlen : len, 1, f );
    39     }
    40     return len;
    41 }
    43 void fwrite_dump( unsigned char *data, unsigned int length, FILE *f ) 
    44 {
    45     unsigned int i, j;
    46     for( i =0; i<length; i+=16 ) {
    47 	fprintf( f, "%08X:", i);
    48 	for( j=i; j<i+16; j++ ) {
    49 	    if( (j % 4) == 0 )
    50 		fprintf( f, " " );
    51 	    if( j < length )
    52 		fprintf( f, " %02X", (unsigned int)(data[j]) );
    53 	    else
    54 		fprintf( f, "   " );
    55 	}
    56 	fprintf( f, "  " );
    57 	for( j=i; j<i+16 && j<length; j++ ) {
    58 	    fprintf( f, "%c", isprint(data[j]) ? data[j] : '.' );
    59 	}
    60 	fprintf( f, "\n" );
    61     }
    62 }
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