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ckifzs.c
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ckifzs.c
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/* $Id: ckifzs.c,v 1.1.1.1 2000/05/10 14:21:34 jholder Exp $
* --------------------------------------------------------------------
* see doc/License.txt for License Information
* --------------------------------------------------------------------
*
* File name: $Id: ckifzs.c,v 1.1.1.1 2000/05/10 14:21:34 jholder Exp $
*
* Description:
*
* Modification history:
* $Log: ckifzs.c,v $
* Revision 1.1.1.1 2000/05/10 14:21:34 jholder
*
* imported
*
*
* --------------------------------------------------------------------
*/
/* quick command to do a sanity check on a QUETZAL file
*
* 28/04/97
*/
/* Altered by John W. Kennedy 2000-03-17 :
* Addtnl ln of output with release number, "serial number" checksum fields
* Optional file buffering added
* Odd-size logic corrected
* Stack dump added
* Data dump added
*/
/*
#define LONG_DUMP
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define GOT_HEADER 0x01
#define GOT_MEMORY 0x02
#define GOT_STACKS 0x04
#define GOT_CMEM 0x10
#define GOT_UMEM 0x20
#define GOT_ALL 0x07
#ifndef EXIT_SUCCESS
#define EXIT_SUCCESS 0
#define EXIT_FAILURE 1
#endif
typedef short ZINT16;
typedef unsigned short ZUINT16;
unsigned char read_byte( FILE * fp )
{
int c;
if ( ( c = getc( fp ) ) == EOF )
{
printf( "*** Premature EOF.\n" );
exit( EXIT_FAILURE );
}
return ( unsigned char ) c;
}
#if defined SHORT_DUMP || defined LONG_DUMP
void coredump( unsigned long ul, unsigned char uch )
{
if ( !( ul % 16 ) )
printf( "\n %08X ", ul );
else if ( !( ul % 8 ) )
fputs( " ", stdout );
else if ( !( ul % 4 ) )
putchar( ' ' );
printf( "%02X", uch );
}
#endif
int main( int argc, char **argv )
{
FILE *fp = stdin;
char buffer[BUFSIZ];
int i;
unsigned char status = 0;
char id[5];
ZUINT16 errors = 0;
unsigned long filelen, cklen, odd_byte;
if ( argc == 2 && strcmp( argv[1], "-" ) )
{
if ( ( fp = fopen( argv[1], "rb" ) ) == NULL )
{
perror( argv[1] );
exit( EXIT_FAILURE );
}
setbuf( fp, buffer );
}
else
{
fprintf( stderr, "usage: %s [file]\n\n", argv[0] );
fprintf( stderr, "Checks a QUETZAL/IFZS file for conformance to the standard.\n" );
fprintf( stderr,
"This does not do in-depth checking, but makes sure all chunk lengths are\n" );
fprintf( stderr,
"correct, and ensures all necessary chunks appear and in the correct order.\n" );
exit( EXIT_FAILURE );
}
/* print details of FORM header */
if ( getc( fp ) != ( int ) 'F' || getc( fp ) != ( int ) 'O' || getc( fp ) != ( int ) 'R' ||
getc( fp ) != ( int ) 'M' )
{
printf( "*** No FORM header: not an IFZS file.\n" );
exit( EXIT_FAILURE );
}
for ( filelen = 0, i = 0; i < 4; ++i )
{
filelen = ( filelen << 8 ) | read_byte( fp );
}
if ( getc( fp ) != ( int ) 'I' || getc( fp ) != ( int ) 'F' || getc( fp ) != ( int ) 'Z' ||
getc( fp ) != ( int ) 'S' )
{
printf( "*** No IFZS type: not an IFZS file.\n" );
exit( EXIT_FAILURE );
}
fprintf( stdout, "FORM %lu IFZS\n", filelen );
filelen -= 4;
if ( filelen & 1 )
{
printf( "*** FORM length is even in all legal files\n" );
++errors;
}
/* loop while there's still something left in the IFZS chunk */
while ( filelen > 0 )
{
/* check there's enough of the IFZS chunk left */
if ( filelen < 8 )
{
printf( "*** IFZS chunk too short to contain another chunk (%lu bytes left)\n", filelen );
exit( EXIT_FAILURE );
}
/* read this chunk's details */
for ( i = 0; i < 4; ++i )
{
id[i] = read_byte( fp );
}
for ( i = 0; i < 4; ++i )
{
if ( id[i] < 0x20 || id[i] > 0x7E )
{
printf( "*** Illegal chunk ID: 0x%02X%02X%02X%02X\n", ( ZUINT16 ) id[0],
( ZUINT16 ) id[1], ( ZUINT16 ) id[2], ( ZUINT16 ) id[3] );
exit( EXIT_FAILURE );
}
}
for ( cklen = 0, i = 0; i < 4; ++i )
{
cklen = ( cklen << 8 ) | read_byte( fp );
}
odd_byte = cklen & 1l;
id[4] = ( unsigned char ) 0;
printf( " %s %6lu", id, cklen );
/* if it's a known chunk id, print more information */
if ( !strncmp( id, "IFhd", 4 ) )
{
printf( " (QUETZAL header)\n" );
if ( status & GOT_HEADER )
{
printf( "*** Only one IFhd chunk is allowed.\n" );
++errors;
}
if ( status & ( GOT_STACKS | GOT_MEMORY ) )
{
printf( "*** warning: IFhd must come before CMem, UMem, or Stks." );
++errors;
}
status |= GOT_HEADER;
if ( cklen >= 2 )
{
unsigned char uch1 = read_byte( fp );
unsigned char uch2 = read_byte( fp );
printf( " Release %u", ( uch1 << 8 ) | uch2 );
cklen -= 2;
filelen -= 2;
if ( cklen >= 6 )
{
fputs( " Serial number ", stdout );
for ( i = 0; i < 6; ++i )
{
putchar( read_byte( fp ) );
}
cklen -= 6;
filelen -= 6;
if ( cklen >= 2 )
{
uch1 = read_byte( fp );
uch2 = read_byte( fp );
printf( " Checksum: %4X", ( uch1 << 8 ) | uch2 );
cklen -= 2;
filelen -= 2;
if ( cklen >= 3 )
{
unsigned char uch3;
uch1 = read_byte( fp );
uch2 = read_byte( fp );
uch3 = read_byte( fp );
printf( " PC: %6X", ( uch1 << 16 ) |
( uch2 << 8 ) | uch3 );
cklen -= 3;
filelen -= 3;
}
}
}
putchar( '\n' );
}
}
else if ( !strncmp( id, "CMem", 4 ) )
{
unsigned long ul1, ul2;
printf( " (compressed memory)" );
#if defined SHORT_DUMP
for ( ul1 = 0; ul1 < cklen; ++ul1 )
{
unsigned char uch = read_byte( fp );
coredump( ul1, uch );
}
filelen -= cklen;
cklen = 0;
#elif defined LONG_DUMP
for ( ul1 = 0, ul2 = 0; ul1 < cklen; ++ul1 )
{
unsigned char uch = read_byte( fp );
if ( !uch )
{
int c = read_byte( fp ) + 1;
++ul1;
while ( c-- )
coredump( ul2++, '\0' );
}
else
coredump( ul2++, uch );
}
putchar( '\n' );
filelen -= cklen;
cklen = 0;
#endif
if ( status & GOT_CMEM )
{
printf( "*** warning: only one CMem chunk is allowed.\n" );
++errors;
}
status |= GOT_MEMORY | GOT_CMEM;
}
else if ( !strncmp( id, "UMem", 4 ) )
{
printf( " (uncompressed memory)\n" );
if ( status & GOT_UMEM )
{
printf( "*** warning: only one UMem chunk is allowed.\n" );
++errors;
}
status |= GOT_MEMORY | GOT_UMEM;
}
else if ( !strncmp( id, "Stks", 4 ) )
{
printf( " (stacks)\n" );
#if defined SHORT_DUMP || defined LONG_DUMP
while ( cklen > 0 )
{
if ( cklen >= 3 )
{
unsigned char uch1 = read_byte( fp );
unsigned char uch2 = read_byte( fp );
unsigned char uch3 = read_byte( fp );
printf( " PC: %6X", ( uch1 << 16 ) | ( uch2 << 8 ) | uch3 );
cklen -= 3;
filelen -= 3;
if ( cklen >= 1 )
{
unsigned char uchFlags = read_byte( fp );
printf( " Flags: %02X", uchFlags );
cklen -= 1;
filelen -= 1;
if ( cklen >= 1 )
{
uch1 = read_byte( fp );
if ( uchFlags & 0x10 )
{
}
else
{
fputs( " Return: ", stdout );
switch ( uch1 )
{
case 0:
fputs( "sp", stdout );
break;
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
case 8:
case 9:
case 10:
case 11:
case 12:
case 13:
case 14:
case 15:
printf( "local%d", uch1 - 1 );
break;
default:
printf( "g%02x", uch1 - 16 );
break;
}
}
cklen -= 1;
filelen -= 1;
if ( cklen >= 1 )
{
uch1 = read_byte( fp );
printf( " Args: %02X", uch1 );
cklen -= 1;
filelen -= 1;
if ( cklen >= 1 )
{
unsigned short usStack;
uch1 = read_byte( fp );
uch2 = read_byte( fp );
usStack = ( uch1 << 8 ) | uch2;
printf( " Local stack use: %d", usStack );
cklen -= 2;
filelen -= 2;
if ( cklen >= ( uchFlags & 0x0Fu ) * 2 )
{
unsigned int i;
for ( i = 0; i < ( uchFlags & 0xFu ); ++i )
{
uch1 = read_byte( fp );
uch2 = read_byte( fp );
if ( i & 0x07u )
{
}
else
{
fputs( "\n ", stdout );
}
printf( " l%d=%04X", i,
( uch1 << 8 ) | uch2 );
cklen -= 2;
filelen -= 2;
}
if ( cklen >= usStack * 2 )
{
for ( i = 0; i < usStack; ++i )
{
if ( i & 0x07u )
{
}
else
{
fputs( "\n ", stdout );
}
uch1 = read_byte( fp );
uch2 = read_byte( fp );
printf( " %04X", ( uch1 << 8 ) |
uch2 );
cklen -= 2;
filelen -= 2;
}
}
}
}
}
}
}
} /* endif */
putchar( '\n' );
}
#endif
if ( status & GOT_STACKS )
{
printf( "*** warning: only one Stks chunk is allowed.\n" );
++errors;
}
status |= GOT_STACKS;
}
else if ( !strncmp( id, "IntD", 4 ) )
{
printf( " (interpreter-dependent)" );
if ( cklen >= 4 )
{
unsigned char uch1;
fputs( " Operating system ", stdout );
for ( i = 0; i < 4; ++i )
{
putchar( read_byte( fp ) );
}
cklen -= 4;
filelen -= 4;
if ( cklen >= 1 )
{
fputs( " flags ", stdout );
uch1 = read_byte( fp );
if ( uch1 & 0x02 )
{
putchar( 's' );
}
if ( uch1 & 0x01 )
{
putchar( 'c' );
}
cklen -= 1;
filelen -= 1;
if ( cklen >= 1 )
{
printf( " contents id %02X", read_byte( fp ) );
cklen -= 1;
filelen -= 2;
if ( cklen >= 6 )
{
( void ) read_byte( fp ); /* discard */
( void ) read_byte( fp ); /* discard */
cklen -= 2;
filelen -= 2;
fputs( " Interpreter ", stdout );
for ( i = 0; i < 4; ++i )
{
putchar( read_byte( fp ) );
}
cklen -= 4;
filelen -= 4;
printf( " %d bytes of data", cklen );
}
}
}
}
putchar( '\n' );
}
else if ( !strncmp( id, "ANNO", 4 ) )
{
printf( " (annotation)" );
if ( cklen >= 1 )
{
unsigned long l;
unsigned char uch1;
fputs( " ", stdout );
for ( l = 0; l < cklen; ++l )
{
putchar( read_byte( fp ) );
}
filelen -= cklen;
cklen = 0;
}
putchar( '\n' );
}
else if ( !strncmp( id, "AUTH", 4 ) )
{
printf( " (author)" );
if ( cklen >= 1 )
{
unsigned long l;
unsigned char uch1;
fputs( " ", stdout );
for ( l = 0; l < cklen; ++l )
{
putchar( read_byte( fp ) );
}
filelen -= cklen;
cklen = 0;
}
putchar( '\n' );
}
else if ( !strncmp( id, "NAME", 4 ) )
{
printf( " (name of content)" );
if ( cklen >= 1 )
{
unsigned long l;
unsigned char uch1;
fputs( " ", stdout );
for ( l = 0; l < cklen; ++l )
{
putchar( read_byte( fp ) );
}
filelen -= cklen;
cklen = 0;
}
putchar( '\n' );
}
else if ( !strncmp( id, "(c) ", 4 ) )
{
printf( " (copyright on content)" );
if ( cklen >= 1 )
{
unsigned long l;
unsigned char uch1;
fputs( " ", stdout );
for ( l = 0; l < cklen; ++l )
{
putchar( read_byte( fp ) );
}
filelen -= cklen;
cklen = 0;
}
putchar( '\n' );
}
else if ( !strncmp( id, " ", 4 ) )
{
printf( " (%d-byte filler)\n", cklen );
}
else
{
printf( "\n*** Unknown %d-byte chunk type found.\n", cklen );
++errors;
}
filelen -= 8;
if ( cklen > filelen )
{
printf( "*** Chunk extends past end of IFZS chunk (%lu left in IFZS)\n", filelen );
exit( EXIT_FAILURE );
}
cklen = ( cklen + odd_byte );
filelen -= cklen;
for ( ; cklen > 0; --cklen )
{
( void ) read_byte( fp ); /* skip chunk contents */
}
}
if ( getc( fp ) != EOF )
{
for ( filelen = 1; getc( fp ) != EOF; ++filelen ) ;
printf( "*** Spurious data (%lu bytes) past specified chunk length\n", filelen );
++errors;
}
if ( argc == 2 && strcmp( argv[1], "-" ) )
{
fclose( fp );
}
i = EXIT_SUCCESS;
if ( ( status & GOT_ALL ) != GOT_ALL )
{
printf( "\n*** Missing chunks:" );
if ( !( status & 0x01 ) )
printf( " IFhd" );
if ( !( status & 0x02 ) )
printf( " Stks" );
if ( !( status & 0x04 ) )
printf( " CMem/UMem" );
printf( "\n" );
i = EXIT_FAILURE;
}
if ( errors > 0 )
{
printf( "\n*** %u error%s.\n", errors, ( errors > 1 ) ? "s" : "" );
i = EXIT_FAILURE;
}
else
{
printf( "\nSave file is valid.\n" );
}
return ( i );
}