/*
Copyright (c) 1993 Xerox Corporation.  All rights reserved.
*/
/*
$Id$

$Date$
*/

#ifndef	__PCR_StdDefs_h
#define __PCR_StdDefs_h	1

#include <config/PCR_StdTypes.h>
#include <config/PCR_Arch.h>

/*
 * Rounding
 */

extern const unsigned long PCR_defaultAlignMASK;

extern unsigned long
PCR_RoundUp(unsigned long x, unsigned long mask);

#define PCR__RoundUp(x,mask) \
	(((x) + (mask)) & (~(mask)))
#define PCR_RoundUp		PCR__RoundUp


extern unsigned long
PCR_RoundDown(unsigned long x, unsigned long mask);

#define PCR__RoundDown(x,mask) \
	((x) & (~(mask)))
#define PCR_RoundDown		PCR__RoundDown


/*
 * Host-network byte order conversions
 */

extern unsigned short
PCR_hton16(unsigned short);

extern unsigned short
PCR_ntoh16(unsigned short);

extern unsigned long
PCR_hton32(unsigned long);

extern unsigned long
PCR_ntoh32(unsigned long);

#if PCR_Arch_ENDIAN3210 /* big-endian */
    
#   define PCR__hton16(x) ((unsigned short)(x))
#   define PCR_hton16 PCR__hton16

#   define PCR__ntoh16(x) ((unsigned short)(x))
#   define PCR_ntoh16 PCR__ntoh16

#   define PCR__hton32(x) ((unsigned long)(x))
#   define PCR_hton32 PCR__hton32

#   define PCR__ntoh32(x) ((unsigned long)(x))
#   define PCR_ntoh32 PCR__ntoh32

#else /* not big-endian */

    /* they're out-of-line, sigh */
 
#endif /* PCR_Arch_ENDIAN3210 */


/*
 * (im)mutability testing.
 *
 * On some systems/arguments both the following may be FALSE,
 *   meaning "don't know".
 */

extern PCR_Bool
PCR_IsMutable(const void *p);
/*
    PCR_IsMutable(p) => *p may be written. 
*/

extern PCR_Bool
PCR_IsImmutable(const void *p);
/*
    PCR_IsImmutable(p) => *p guaranteed not to change. 
*/


#endif /* !__PCR_StdDefs_h */

/*
$Log$
*/