struct xfdBufferInfo *open_xfd(struct local_data *data)
{
#ifdef __amigaos4__
data->IExec = (struct ExecIFace *)(*(struct ExecBase **)4)->MainInterface;
#endif
if(data->xfdMasterBase = OpenLibrary("xfdmaster.library",38))
{
#ifdef __amigaos4__
if(data->IxfdMaster = (struct xfdMasterIFace *)GetInterface(data->xfdMasterBase,"main",1,NULL))
{
#endif
return(struct xfdBufferInfo *)xfdAllocObject(XFDOBJ_BUFFERINFO);
#ifdef __amigaos4__
}
#endif
}
close_xfd(NULL);
return NULL;
}
/* Identify a file without attempting to decompress it */
libspectrum_error
libspectrum_identify_file_raw( libspectrum_id_t *type, const char *filename,
const unsigned char *buffer, size_t length )
{
struct type {
int type;
const char *extension; int extension_score;
const char *signature; size_t offset, length; int sig_score;
};
struct type *ptr,
types[] = {
{ LIBSPECTRUM_ID_RECORDING_RZX, "rzx", 3, "RZX!", 0, 4, 4 },
{ LIBSPECTRUM_ID_SNAPSHOT_SNA, "sna", 3, NULL, 0, 0, 0 },
/* Peter McGavin's Spectrum Emulator on the Amiga used .snapshot for sna
snaps */
{ LIBSPECTRUM_ID_SNAPSHOT_SNA, "snapshot", 3, NULL, 0, 0, 0 },
{ LIBSPECTRUM_ID_SNAPSHOT_SNP, "snp", 3, NULL, 0, 0, 0 },
{ LIBSPECTRUM_ID_SNAPSHOT_SP, "sp", 3, "\x53\x50\0", 0, 3, 1 },
{ LIBSPECTRUM_ID_SNAPSHOT_SZX, "szx", 3, "ZXST", 0, 4, 4 },
{ LIBSPECTRUM_ID_SNAPSHOT_Z80, "z80", 3, "\0\0", 6, 2, 1 },
/* .slt files also dealt with by the .z80 loading code */
{ LIBSPECTRUM_ID_SNAPSHOT_Z80, "slt", 3, "\0\0", 6, 2, 1 },
{ LIBSPECTRUM_ID_SNAPSHOT_ZXS, "zxs", 3, "SNAP", 8, 4, 4 },
{ LIBSPECTRUM_ID_SNAPSHOT_PLUSD,"mgtsnp", 3, NULL, 0, 0, 0 },
{ LIBSPECTRUM_ID_CARTRIDGE_DCK, "dck", 3, NULL, 0, 0, 0 },
{ LIBSPECTRUM_ID_CARTRIDGE_IF2, "rom", 3, NULL, 0, 0, 0 },
{ LIBSPECTRUM_ID_MICRODRIVE_MDR, "mdr", 3, NULL, 0, 0, 0 },
{ LIBSPECTRUM_ID_TAPE_TAP, "tap", 3, "\x13\0\0", 0, 3, 1 },
{ LIBSPECTRUM_ID_TAPE_SPC, "spc", 3, "\x11\0\0", 0, 3, 1 },
{ LIBSPECTRUM_ID_TAPE_STA, "sta", 3, "\x11\0\0", 0, 3, 1 },
{ LIBSPECTRUM_ID_TAPE_LTP, "ltp", 3, "\x11\0\0", 0, 3, 1 },
{ LIBSPECTRUM_ID_TAPE_TZX, "tzx", 3, "ZXTape!", 0, 7, 4 },
{ LIBSPECTRUM_ID_TAPE_WARAJEVO, "tap", 2, "\xff\xff\xff\xff", 8, 4, 2 },
{ LIBSPECTRUM_ID_DISK_DSK, "dsk", 3, NULL, 0, 0, 0 },
{ LIBSPECTRUM_ID_DISK_SCL, "scl", 3, "SINCLAIR", 0, 8, 4 },
{ LIBSPECTRUM_ID_DISK_TRD, "trd", 3, NULL, 0, 0, 0 },
{ LIBSPECTRUM_ID_HARDDISK_HDF, "hdf", 3, "RS-IDE\x1a", 0, 7, 4 },
{ LIBSPECTRUM_ID_COMPRESSED_BZ2,"bz2", 3, "BZh", 0, 3, 4 },
{ LIBSPECTRUM_ID_COMPRESSED_GZ, "gz", 3, "\x1f\x8b", 0, 2, 4 },
{ LIBSPECTRUM_ID_TAPE_Z80EM, "raw", 1, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0Raw tape sample", 0, 64, 0 },
{ LIBSPECTRUM_ID_TAPE_CSW, "csw", 2, "Compressed Square Wave\x1a", 0, 23, 4 },
{ LIBSPECTRUM_ID_TAPE_WAV, "wav", 3, NULL, 0, 0, 0 },
{ LIBSPECTRUM_ID_DISK_MGT, "mgt", 3, NULL, 0, 0, 0 },
{ LIBSPECTRUM_ID_DISK_IMG, "img", 3, NULL, 0, 0, 0 },
{ -1, NULL, 0, NULL, 0, 0, 0 }, /* End marker */
};
const char *extension = NULL;
int score, best_score, best_guess, duplicate_best;
/* Get the filename extension, if it exists */
if( filename ) {
extension = strrchr( filename, '.' ); if( extension ) extension++;
}
best_guess = LIBSPECTRUM_ID_UNKNOWN; best_score = 0; duplicate_best = 0;
/* Compare against known extensions and signatures */
for( ptr = types; ptr->type != -1; ptr++ ) {
score = 0;
if( extension && ptr->extension &&
!strcasecmp( extension, ptr->extension ) )
score += ptr->extension_score;
if( ptr->signature && length >= ptr->offset + ptr->length &&
!memcmp( &buffer[ ptr->offset ], ptr->signature, ptr->length ) )
score += ptr->sig_score;
if( score > best_score ) {
best_guess = ptr->type; best_score = score; duplicate_best = 0;
} else if( score == best_score && ptr->type != best_guess ) {
duplicate_best = 1;
}
}
#if defined AMIGA || defined __MORPHOS__
/* Compressed file check through xfdmaster.library */
/* this prevents most good matches and gz/bz2 from being run through xfd (xfd
supports gz, but we want to use the internal code) */
if( best_score <= 3 ) {
#ifndef __MORPHOS__
struct ExecIFace *IExec =
(struct ExecIFace *)(*(struct ExecBase **)4)->MainInterface;
#endif /* #ifndef __MORPHOS__ */
struct xfdBufferInfo *xfdobj;
#ifndef __MORPHOS__
if( xfdMasterBase = IExec->OpenLibrary("xfdmaster.library",38 ) ) {
if( IxfdMaster =
(struct xfdMasterIFace *)IExec->GetInterface(xfdMasterBase,"main",1,NULL)){
if( xfdobj = (struct xfdBufferInfo *)IxfdMaster->xfdAllocObject(XFDOBJ_BUFFERINFO) ) {
#else /* #ifndef __MORPHOS__ */
if( xfdMasterBase = OpenLibrary("xfdmaster.library",38 ) ) {
if( xfdobj = (struct xfdBufferInfo *)xfdAllocObject(XFDOBJ_BUFFERINFO) ) {
#endif /* #ifndef __MORPHOS__ */
xfdobj->xfdbi_SourceBuffer = buffer;
xfdobj->xfdbi_SourceBufLen = length;
xfdobj->xfdbi_Flags = XFDFB_RECOGTARGETLEN | XFDFB_RECOGEXTERN;
#ifndef __MORPHOS__
if( IxfdMaster->xfdRecogBuffer( xfdobj ) ) {
#else /* #ifndef __MORPHOS__ */
if( xfdRecogBuffer( xfdobj ) ) {
#endif /* #ifndef __MORPHOS__ */
best_guess = LIBSPECTRUM_ID_COMPRESSED_XFD;
duplicate_best=0;
}
#ifndef __MORPHOS__
IxfdMaster->xfdFreeObject( (APTR)xfdobj );
#else /* #ifndef __MORPHOS__ */
xfdFreeObject( (APTR)xfdobj );
#endif /* #ifndef __MORPHOS__ */
}
#ifndef __MORPHOS__
IExec->DropInterface( (struct Interface *)IxfdMaster );
}
IExec->CloseLibrary( xfdMasterBase );
#else /* #ifndef __MORPHOS__ */
CloseLibrary( xfdMasterBase );
#endif /* #ifndef __MORPHOS__ */
}
}
#endif /* #ifdef AMIGA */
/* If two things were equally good, we can't identify this. Otherwise,
return our best guess */
if( duplicate_best ) {
*type = LIBSPECTRUM_ID_UNKNOWN;
} else {
*type = best_guess;
}
return LIBSPECTRUM_ERROR_NONE;
}
/* What generic 'class' of file is this file */
libspectrum_error
libspectrum_identify_class( libspectrum_class_t *libspectrum_class,
libspectrum_id_t type )
{
switch( type ) {
case LIBSPECTRUM_ID_UNKNOWN:
*libspectrum_class = LIBSPECTRUM_CLASS_UNKNOWN; return 0;
case LIBSPECTRUM_ID_CARTRIDGE_DCK:
*libspectrum_class = LIBSPECTRUM_CLASS_CARTRIDGE_TIMEX; return 0;
case LIBSPECTRUM_ID_COMPRESSED_BZ2:
case LIBSPECTRUM_ID_COMPRESSED_GZ:
case LIBSPECTRUM_ID_COMPRESSED_XFD:
*libspectrum_class = LIBSPECTRUM_CLASS_COMPRESSED; return 0;
case LIBSPECTRUM_ID_DISK_DSK:
*libspectrum_class = LIBSPECTRUM_CLASS_DISK_PLUS3; return 0;
case LIBSPECTRUM_ID_DISK_IMG:
case LIBSPECTRUM_ID_DISK_MGT:
*libspectrum_class = LIBSPECTRUM_CLASS_DISK_PLUSD; return 0;
case LIBSPECTRUM_ID_DISK_SCL:
case LIBSPECTRUM_ID_DISK_TRD:
*libspectrum_class = LIBSPECTRUM_CLASS_DISK_TRDOS; return 0;
case LIBSPECTRUM_ID_HARDDISK_HDF:
*libspectrum_class = LIBSPECTRUM_CLASS_HARDDISK; return 0;
case LIBSPECTRUM_ID_MICRODRIVE_MDR:
*libspectrum_class = LIBSPECTRUM_CLASS_MICRODRIVE; return 0;
case LIBSPECTRUM_ID_RECORDING_RZX:
*libspectrum_class = LIBSPECTRUM_CLASS_RECORDING; return 0;
case LIBSPECTRUM_ID_SNAPSHOT_PLUSD:
case LIBSPECTRUM_ID_SNAPSHOT_SNA:
case LIBSPECTRUM_ID_SNAPSHOT_SNP:
case LIBSPECTRUM_ID_SNAPSHOT_SP:
case LIBSPECTRUM_ID_SNAPSHOT_SZX:
case LIBSPECTRUM_ID_SNAPSHOT_Z80:
case LIBSPECTRUM_ID_SNAPSHOT_ZXS:
*libspectrum_class = LIBSPECTRUM_CLASS_SNAPSHOT; return 0;
case LIBSPECTRUM_ID_TAPE_TAP:
case LIBSPECTRUM_ID_TAPE_SPC:
case LIBSPECTRUM_ID_TAPE_STA:
case LIBSPECTRUM_ID_TAPE_LTP:
case LIBSPECTRUM_ID_TAPE_TZX:
case LIBSPECTRUM_ID_TAPE_WARAJEVO:
case LIBSPECTRUM_ID_TAPE_Z80EM:
case LIBSPECTRUM_ID_TAPE_CSW:
case LIBSPECTRUM_ID_TAPE_WAV:
*libspectrum_class = LIBSPECTRUM_CLASS_TAPE; return 0;
case LIBSPECTRUM_ID_CARTRIDGE_IF2:
*libspectrum_class = LIBSPECTRUM_CLASS_CARTRIDGE_IF2; return 0;
}
libspectrum_print_error( LIBSPECTRUM_ERROR_UNKNOWN,
"Unknown file type %d", type );
return LIBSPECTRUM_ERROR_UNKNOWN;
}
libspectrum_error
libspectrum_uncompress_file( unsigned char **new_buffer, size_t *new_length,
char **new_filename, libspectrum_id_t type,
const unsigned char *old_buffer,
size_t old_length, const char *old_filename )
{
libspectrum_class_t class;
libspectrum_error error;
error = libspectrum_identify_class( &class, type );
if( error ) return error;
if( class != LIBSPECTRUM_CLASS_COMPRESSED ) {
libspectrum_print_error( LIBSPECTRUM_ERROR_LOGIC,
"file type %d is not a compressed type", type );
return LIBSPECTRUM_ERROR_LOGIC;
}
if( new_filename && old_filename ) {
*new_filename = strdup( old_filename );
if( !*new_filename ) {
libspectrum_print_error( LIBSPECTRUM_ERROR_MEMORY,
"out of memory at %s:%d", __FILE__, __LINE__ );
return LIBSPECTRUM_ERROR_MEMORY;
}
}
/* Tells the inflation routines to allocate memory for us */
*new_length = 0;
switch( type ) {
case LIBSPECTRUM_ID_COMPRESSED_BZ2:
#ifdef HAVE_LIBBZ2
if( new_filename && *new_filename ) {
if( strlen( *new_filename ) >= 4 &&
!strcasecmp( &(*new_filename)[ strlen( *new_filename ) - 4 ],
".bz2" ) )
(*new_filename)[ strlen( *new_filename ) - 4 ] = '\0';
}
error = libspectrum_bzip2_inflate( old_buffer, old_length,
new_buffer, new_length );
if( error ) {
if( new_filename ) free( *new_filename );
return error;
}
#else /* #ifdef HAVE_LIBBZ2 */
libspectrum_print_error(
LIBSPECTRUM_ERROR_UNKNOWN,
"libbz2 not available to decompress bzipped file"
);
if( new_filename ) free( *new_filename );
return LIBSPECTRUM_ERROR_UNKNOWN;
#endif /* #ifdef HAVE_LIBBZ2 */
break;
case LIBSPECTRUM_ID_COMPRESSED_GZ:
#ifdef HAVE_ZLIB_H
if( new_filename && *new_filename ) {
if( strlen( *new_filename ) >= 3 &&
!strcasecmp( &(*new_filename)[ strlen( *new_filename ) - 3 ],
".gz" ) )
(*new_filename)[ strlen( *new_filename ) - 3 ] = '\0';
}
error = libspectrum_gzip_inflate( old_buffer, old_length,
new_buffer, new_length );
if( error ) {
if( new_filename ) free( *new_filename );
return error;
}
#else /* #ifdef HAVE_ZLIB_H */
libspectrum_print_error( LIBSPECTRUM_ERROR_UNKNOWN,
"zlib not available to decompress gzipped file" );
if( new_filename ) free( *new_filename );
return LIBSPECTRUM_ERROR_UNKNOWN;
#endif /* #ifdef HAVE_ZLIB_H */
break;
#if defined AMIGA || defined __MORPHOS__
case LIBSPECTRUM_ID_COMPRESSED_XFD:
{
#ifndef __MORPHOS__
struct ExecIFace *IExec =
(struct ExecIFace *)(*(struct ExecBase **)4)->MainInterface;
#endif /* #ifndef __MORPHOS__ */
struct xfdBufferInfo *xfdobj;
#ifndef __MORPHOS__
if( xfdMasterBase = IExec->OpenLibrary( "xfdmaster.library", 38 ) ) {
if( IxfdMaster =
(struct xfdMasterIFace *)IExec->GetInterface(xfdMasterBase,"main",1,NULL)) {
if( xfdobj =
(struct xfdBufferInfo *)IxfdMaster->xfdAllocObject(XFDOBJ_BUFFERINFO) ) {
#else /* #ifndef __MORPHOS__ */
if( xfdMasterBase = OpenLibrary( "xfdmaster.library", 38 ) ) {
if( xfdobj = (struct xfdBufferInfo *)xfdAllocObject(XFDOBJ_BUFFERINFO) ) {
#endif /* #ifndef __MORPHOS__ */
xfdobj->xfdbi_SourceBufLen = old_length;
xfdobj->xfdbi_SourceBuffer = old_buffer;
xfdobj->xfdbi_Flags = XFDFB_RECOGEXTERN | XFDFB_RECOGTARGETLEN;
xfdobj->xfdbi_PackerFlags = XFDPFB_RECOGLEN;
#ifndef __MORPHOS__
if( IxfdMaster->xfdRecogBuffer( xfdobj ) ) {
#else /* #ifndef __MORPHOS__ */
if( xfdRecogBuffer( xfdobj ) ) {
#endif /* #ifndef __MORPHOS__ */
xfdobj->xfdbi_TargetBufMemType = MEMF_ANY;
#ifndef __MORPHOS__
if( IxfdMaster->xfdDecrunchBuffer( xfdobj ) ) {
#else /* #ifndef __MORPHOS__ */
if( xfdDecrunchBuffer( xfdobj ) ) {
#endif /* #ifndef __MORPHOS__ */
*new_buffer = malloc( xfdobj->xfdbi_TargetBufSaveLen );
*new_length = xfdobj->xfdbi_TargetBufSaveLen;
memcpy( *new_buffer, xfdobj->xfdbi_TargetBuffer, *new_length );
#ifndef __MORPHOS__
IExec->FreeMem( xfdobj->xfdbi_TargetBuffer,xfdobj->xfdbi_TargetBufLen );
#else /* #ifndef __MORPHOS__ */
FreeMem( xfdobj->xfdbi_TargetBuffer,xfdobj->xfdbi_TargetBufLen );
#endif /* #ifndef __MORPHOS__ */
} else {
libspectrum_print_error(
LIBSPECTRUM_ERROR_UNKNOWN,
"xfdmaster.library not able to decrunch %s file",
xfdobj->xfdbi_PackerName );
return LIBSPECTRUM_ERROR_UNKNOWN;
}
} else {
libspectrum_print_error(
LIBSPECTRUM_ERROR_UNKNOWN,
"xfdmaster.library does not recognise file" );
return LIBSPECTRUM_ERROR_UNKNOWN;
}
#ifndef __MORPHOS__
IxfdMaster->xfdFreeObject( xfdobj );
#else /* #ifndef __MORPHOS__ */
xfdFreeObject( xfdobj );
#endif /* #ifndef __MORPHOS__ */
}
#ifndef __MORPHOS__
IExec->DropInterface( (struct Interface *)IxfdMaster );
}
IExec->CloseLibrary( xfdMasterBase );
#else /* #ifndef __MORPHOS__ */
CloseLibrary( xfdMasterBase );
#endif /* #ifndef __MORPHOS__ */
}
}
break;
#endif /* #ifdef AMIGA */
default:
libspectrum_print_error( LIBSPECTRUM_ERROR_LOGIC,
"unknown compressed type %d", type );
if( new_filename ) free( *new_filename );
return LIBSPECTRUM_ERROR_LOGIC;
}
return LIBSPECTRUM_ERROR_NONE;
}
/* Ensure there is room for `requested' characters after the current
position `ptr' in `buffer'. If not, realloc() and update the
pointers as necessary */
int
libspectrum_make_room( libspectrum_byte **dest, size_t requested,
libspectrum_byte **ptr, size_t *allocated )
{
size_t current_length;
current_length = *ptr - *dest;
if( *allocated == 0 ) {
(*allocated) = requested;
*dest = (libspectrum_byte*)malloc( requested * sizeof(libspectrum_byte) );
if( *dest == NULL ) return 1;
} else {
/* If there's already enough room here, just return */
if( current_length + requested <= (*allocated) ) return 0;
/* Make the new size the maximum of the new needed size and the
old allocated size * 2 */
(*allocated) =
current_length + requested > 2 * (*allocated) ?
current_length + requested :
2 * (*allocated);
*dest = (libspectrum_byte*)
realloc( *dest, (*allocated) * sizeof( libspectrum_byte ) );
if( *dest == NULL ) return 1;
}
/* Update the secondary pointer to the block */
*ptr = *dest + current_length;
return 0;
}
/* Read an LSB word from 'buffer' */
libspectrum_word
libspectrum_read_word( const libspectrum_byte **buffer )
{
libspectrum_word value;
value = (*buffer)[0] + (*buffer)[1] * 0x100;
(*buffer) += 2;
return value;
}
/* Read an LSB dword from buffer */
libspectrum_dword
libspectrum_read_dword( const libspectrum_byte **buffer )
{
libspectrum_dword value;
value = (*buffer)[0] +
(*buffer)[1] * 0x100 +
(*buffer)[2] * 0x10000 +
(*buffer)[3] * 0x1000000 ;
(*buffer) += 4;
return value;
}
/* Write an (LSB) word to buffer */
int
libspectrum_write_word( libspectrum_byte **buffer, libspectrum_word w )
{
*(*buffer)++ = w & 0xff;
*(*buffer)++ = w >> 8;
return LIBSPECTRUM_ERROR_NONE;
}
/* Write an LSB dword to buffer */
int libspectrum_write_dword( libspectrum_byte **buffer, libspectrum_dword d )
{
*(*buffer)++ = ( d & 0x000000ff ) ;
*(*buffer)++ = ( d & 0x0000ff00 ) >> 8;
*(*buffer)++ = ( d & 0x00ff0000 ) >> 16;
*(*buffer)++ = ( d & 0xff000000 ) >> 24;
return LIBSPECTRUM_ERROR_NONE;
}