/* This file defines certain low level operations and characteristics that
 * are likely to be machine dependent.
 */

#if	(MPU8086 || MPU8080 || vax)
#define	LITTLE_ENDIAN	/* Low order bytes are first in memory */
#endif

#ifdef	AMIGA

#ifdef	AMIGADEVDRV
#define	disable()	Forbid()	/* doesn't really return a value */
#define	restore(intst)	Permit()

#else

#define	disable()	(0)	/* got to return a value */
#define	restore(intst)		/* but we're not gonna do anything */
#endif

#ifdef WINDOWIO
#ifdef	putchar
#undef	putchar
#endif
#ifdef	fflush
#undef	fflush
#endif
#define	putchar(c)	amigaputchar(c)
#ifdef LATTICE
#define	fflush(fp)	((fp)==stdout ? amigaflush() : _flsbf(-1, fp))
#else
#define	fflush(fp)	((fp)==stdout ? amigaflush() : flsh_(fp, -1))
#endif
				/* this has to be the same as in stdio.h */
#ifdef LATTICE
#define index strchr
#endif
#endif
#ifdef LATTICE
#undef printf
#endif
#endif WINDOWIO
/* These two lines assume that your compiler's longs are 32 bits and
 * shorts are 16 bits. It is already assumed that chars are 8 bits,
 * but it doesn't matter if they're signed or unsigned.
 */
typedef long int32;		/* 32-bit signed integer */
typedef unsigned short int16;	/* 16-bit unsigned integer */

#define	bcopy(a,b,cnt)	movmem(a,b,cnt)

#ifdef	LITTLE_ENDIAN
int32 ntohl();
int16 ntohs();
#else	/* Degenerate case for Big Endian machines */
#define	ntohl(x)	(x)
#define ntohs(x)	(x)
#endif

#define	min(x,y)	((x)<(y)?(x):(y))
#define	max(x,y)	((x)>(y)?(x):(y))

int16 cksum();

/* Host-to-network and network-to-host are symmetrical */
#define htonl(x)	ntohl(x)
#define	htons(x)	ntohs(x)

#ifdef	MPU8080	/* Assembler routines are available */
int16 hinibble(),lonibble(),hibyte(),lobyte(),hiword(),loword();

#else

/* Extract a short from a long */
#define	hiword(x)	((int16)((x) >> 16))
#define	loword(x)	((int16)(x))

/* Extract a byte from a short */
#define	hibyte(x)	(((x) >> 8) & 0xff)
#define	lobyte(x)	((x) & 0xff)

/* Extract nibbles from a byte */
#define	hinibble(x)	(((x) >> 4) & 0xf)
#define	lonibble(x)	((x) & 0xf)

#endif

/* Define null object pointer in case stdio.h isn't included */
#ifndef	NULL
/* General purpose NULL pointer */
#define	NULL (void *)0
#endif
#define	NULLCHAR (char *)NULL	/* Null character pointer */
#define	NULLFP	 (int (*)())0	/* Null pointer to function returning int */
#define	NULLVFP	 (void (*)())0	/* Null pointer to function returning void */
#define	NULLFILE (FILE *)NULL	/* Null file pointer */