/*
 *  GLOBALS.H	- GLOBALS FOR ZIP AND UNZIP
 *
 *  The union structure is designed so we can share zip/unzip buffer memory
 */

#ifndef WSIZE			/* max 32K, power of 2	*/
#define WSIZE 32768
#endif

#ifdef SMALL_MEM
#define HASH_BITS	13
#define LIT_BUFSIZE	0x2000
#else
#ifdef MEDIUM_MEM
#define HASH_BITS	14
#define LIT_BUFSIZE	0x4000
#else
#define HASH_BITS	15
#define LIT_BUFSIZE	0x8000
#endif
#endif

#define DIST_BUFSIZE	LIT_BUFSIZE

#define HASH_SIZE	(1 << HASH_BITS)
#define HASH_MASK	(HASH_SIZE-1)
#define WMASK		(WSIZE-1)

#define MAX_BITS	13
#define HSIZE		(1 << MAX_BITS)

typedef unsigned char byte;
typedef unsigned char uch;
typedef unsigned short ush;
typedef unsigned long ulg;

typedef ush Pos;

union Globals {
    struct {
	uch window[2L*WSIZE];
	Pos prev[WSIZE];
	Pos head[HASH_SIZE];
	uch l_buf[LIT_BUFSIZE];
	ush d_buf[DIST_BUFSIZE];
	char file_outbuf[1024];
    } zip;
    struct {
	short prefix_of[HSIZE+2];
	byte suffix_of[HSIZE+2];
	byte stack[HSIZE+2];
	byte slide[WSIZE];
    } unzip;
};

extern __far union Globals Globals;

#define window		Globals.zip.window
#define prev		Globals.zip.prev
#define head		Globals.zip.head
#define l_buf		Globals.zip.l_buf
#define d_buf		Globals.zip.d_buf
#define file_outbuf	Globals.zip.file_outbuf

#define prefix_of	Globals.unzip.prefix_of
#define suffix_of	Globals.unzip.suffix_of
#define stack		Globals.unzip.stack
#define slide		Globals.unzip.slide