/*
-----------------------------------------------------------------------------
Function: CAL_SetupMapFile -Setup map files for decoding.
Parameters: extension -[in] file extension for map data files.
Returns: Non-zero on success, zero otherwise.
Notes:
-----------------------------------------------------------------------------
*/
PRIVATE W8 CAL_SetupMapFile( const char *extension )
{
FILE *handle;
SW32 length;
char fname[ 13 ];
//
// load maphead.xxx (offsets and tileinfo for map file)
//
cs_strlcpy( fname, MAPHEADNAME, sizeof( fname ) );
cs_strlcat( fname, extension, sizeof( fname ) );
handle = fopen( cs_strupr( fname ), "rb" );
if( handle == NULL )
{
handle = fopen( cs_strlwr( fname ), "rb" );
if( handle == NULL )
{
printf( "Could not open file (%s) for read!\n", fname );
return 0;
}
}
length = FS_FileLength( handle );
fread( &RLEWtag, 2, 1, handle );
for( TotalMaps = 0 ; TotalMaps < length ; ++TotalMaps )
{
fread( &headeroffsets[ TotalMaps ], 4, 1, handle );
if( ! headeroffsets[ TotalMaps ] )
{
break;
}
}
fclose( handle );
cs_strlcpy( fname, MAPNAME, sizeof( fname ) );
cs_strlcat( fname, extension, sizeof( fname ) );
maphandle = fopen( cs_strupr( fname ), "rb");
if( NULL == maphandle )
{
maphandle = fopen( cs_strlwr( fname ), "rb");
if( NULL == maphandle )
{
return 0;
}
}
return 1;
}
/*
-----------------------------------------------------------------------------
Function: CAL_SetupGrFile() -Initialize graphic files and arrays.
Parameters: extension -[in] Pointer to a null-terminated string that
specifies the file extension.
(must be in '.XXX' format).
Returns: 1 on success, 0 otherwise.
Notes:
Uses global variables grhandle and pictable.
1. Open vgadict.XXX, read huffman dictionary data.
2. Open vgahead.XXX, read data offsets.
3. Open vgagraph.XXX, read pic and sprite header, expand data.
-----------------------------------------------------------------------------
*/
PRIVATE W8 CAL_SetupGrFile( const char *extension )
{
void *compseg;
FILE *handle;
char filename[ 16 ];
SW32 chunkcomplen; // chunk compressed length
//
// load vgadict.ext (huffman dictionary for graphics files)
//
cs_strlcpy( filename, GFXDICTFNAME, sizeof( filename ) );
cs_strlcat( filename, extension, sizeof( filename ) );
if( ( handle = fopen( cs_strupr( filename ), "rb" ) ) == NULL )
{
if( ( handle = fopen( cs_strlwr( filename ), "rb" ) ) == NULL )
{
printf( "Could not open file (%s) for read!\n", filename );
return 0;
}
}
fread( grhuffman, sizeof( grhuffman ), 1, handle );
fclose( handle );
//
// Open then load the data offsets from vgahead.ext
//
cs_strlcpy( filename, GFXHEADFNAME, sizeof( filename ) );
cs_strlcat( filename, extension, sizeof( filename ) );
if( (handle = fopen( cs_strupr( filename ), "rb" )) == NULL )
{
if( (handle = fopen( cs_strlwr( filename ), "rb" )) == NULL )
{
printf( "Could not open file (%s) for read!\n", filename );
return 0;
}
}
grstarts = MM_MALLOC( (NUMCHUNKS+1) * FILEPOSSIZE );
if( grstarts == NULL )
{
return 0;
}
fread( grstarts, sizeof( long ), (NUMCHUNKS+1) * FILEPOSSIZE, handle );
fclose( handle );
//
// Open the graphics file 'vgagraph.XXX'.
//
cs_strlcpy( filename, GFXFNAME, sizeof( filename ) );
cs_strlcat( filename, extension, sizeof( filename ) );
if( ( grhandle = fopen( cs_strupr( filename ), "rb" ) ) == NULL )
{
if( ( grhandle = fopen( cs_strlwr( filename ), "rb" ) ) == NULL )
{
printf( "Could not open file (%s) for read!\n", filename );
return 0;
}
}
//
// load the pic and sprite headers into the arrays.
//
pictable = MM_MALLOC( NUMPICS * sizeof( pictabletype ) );
if( pictable == NULL )
{
return 0;
}
chunkcomplen = CAL_GetGrChunkLength( STRUCTPIC ); // position file pointer
compseg = MM_MALLOC( chunkcomplen );
if( compseg == NULL )
{
return 0;
}
fread( compseg, chunkcomplen, 1, grhandle );
CAL_HuffExpand( compseg, (PW8)pictable,
NUMPICS * sizeof( pictabletype ),
grhuffman );
MM_FREE( compseg );
return 1;
}
/*
-----------------------------------------------------------------------------
Function: CAL_SetupAudioFile() -Setup for decoding audio data.
Parameters: fextension -[in] Pointer to string with file extension.
Returns: Non-zero on success, otherwise zero.
Notes:
-----------------------------------------------------------------------------
*/
PRIVATE W8 CAL_SetupAudioFile( const char *fextension )
{
FILE *handle;
SW32 length;
W32 count;
char fname[ 13 ];
if( ! fextension || ! *fextension )
{
printf( "NULL extension passed into CAL_SetupAudioFile!\n" );
return 0;
}
//
// load audiohed.XXX (offsets and lengths for audio file)
//
cs_strlcpy( fname, AHEADFNAME, sizeof( fname ) );
cs_strlcat( fname, fextension, sizeof( fname ) );
handle = fopen( cs_strupr( fname ), "rb" );
if( handle == NULL )
{
handle = fopen( cs_strlwr( fname ), "rb" );
if( handle == NULL )
{
printf( "Can not open file (%s) for read!\n", fname );
return 0;
}
}
length = FS_FileLength( handle );
if( length < 4 )
{
fclose( handle );
printf( "Incorrect audio header size on file: %s\n", fname );
return 0;
}
audiostarts = (PW32) MM_MALLOC( length );
if( audiostarts == NULL )
{
return 0;
}
count = fread( audiostarts, sizeof( W32 ), length >> 2, handle );
if( count != (W32)(length >> 2) )
{
fclose( handle );
printf( "[Error]: Read error on file: (%s)", fname );
return 0;
}
fclose( handle );
//
// open the Audio data file
//
cs_strlcpy( fname, AUDIOFNAME, sizeof( fname ) );
cs_strlcat( fname, fextension, sizeof( fname ) );
audiohandle = fopen( cs_strupr( fname ), "rb" );
if( audiohandle == NULL )
{
audiohandle = fopen( cs_strlwr( fname ), "rb" );
if( audiohandle == NULL )
{
printf( "Could not open file (%s) for read!\n", fname );
return 0;
}
}
return 1;
}
