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/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2006 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2009 IBM Corporation. All rights reserved.
* Copyright (c) 2009 Los Alamos National Security, LLC. All rights
* reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#ifndef _OPAL_CRC_H_
#define _OPAL_CRC_H_
#include "opal_config.h"
#include <stddef.h>
BEGIN_C_DECLS
#define CRC_POLYNOMIAL ((unsigned int) 0x04c11db7)
#define CRC_INITIAL_REGISTER ((unsigned int) 0xffffffff)
#define OPAL_CSUM(SRC, LEN) opal_uicsum(SRC, LEN)
#define OPAL_CSUM_PARTIAL(SRC, LEN, UI1, UI2) opal_uicsum_partial(SRC, LEN, UI1, UI2)
#define OPAL_CSUM_BCOPY_PARTIAL(SRC, DST, LEN1, LEN2, UI1, UI2) \
opal_bcopy_uicsum_partial(SRC, DST, LEN1, LEN2, UI1, UI2)
#define OPAL_CSUM_ZERO 0
OPAL_DECLSPEC unsigned long opal_bcopy_csum_partial(const void *source, void *destination,
size_t copylen, size_t csumlen,
unsigned long *lastPartialLong,
size_t *lastPartialLength);
static inline unsigned long opal_bcopy_csum(const void *source, void *destination, size_t copylen,
size_t csumlen)
{
unsigned long plong = 0;
size_t plength = 0;
return opal_bcopy_csum_partial(source, destination, copylen, csumlen, &plong, &plength);
}
OPAL_DECLSPEC unsigned int opal_bcopy_uicsum_partial(const void *source, void *destination,
size_t copylen, size_t csumlen,
unsigned int *lastPartialInt,
size_t *lastPartialLength);
static inline unsigned int opal_bcopy_uicsum(const void *source, void *destination, size_t copylen,
size_t csumlen)
{
unsigned int pint = 0;
size_t plength = 0;
return opal_bcopy_uicsum_partial(source, destination, copylen, csumlen, &pint, &plength);
}
OPAL_DECLSPEC unsigned long opal_csum_partial(const void *source, size_t csumlen,
unsigned long *lastPartialLong,
size_t *lastPartialLength);
static inline unsigned long opal_csum(const void *source, size_t csumlen)
{
unsigned long lastPartialLong = 0;
size_t lastPartialLength = 0;
return opal_csum_partial(source, csumlen, &lastPartialLong, &lastPartialLength);
}
/*
* The buffer passed to this function is assumed to be 16-bit aligned
*/
static inline uint16_t opal_csum16(const void *source, size_t csumlen)
{
uint16_t *src = (uint16_t *) source;
register uint32_t csum = 0;
while (csumlen > 1) {
csum += *src++;
csumlen -= 2;
}
/* Add leftover byte, if any */
if (csumlen > 0)
csum += *((unsigned char *) src);
/* Fold 32-bit checksum to 16 bits */
while (csum >> 16) {
csum = (csum & 0xFFFF) + (csum >> 16);
}
return csum;
}
OPAL_DECLSPEC unsigned int opal_uicsum_partial(const void *source, size_t csumlen,
unsigned int *lastPartialInt,
size_t *lastPartialLength);
static inline unsigned int opal_uicsum(const void *source, size_t csumlen)
{
unsigned int lastPartialInt = 0;
size_t lastPartialLength = 0;
return opal_uicsum_partial(source, csumlen, &lastPartialInt, &lastPartialLength);
}
/*
* CRC Support
*/
void opal_initialize_crc_table(void);
OPAL_DECLSPEC unsigned int opal_bcopy_uicrc_partial(const void *source, void *destination,
size_t copylen, size_t crclen,
unsigned int partial_crc);
static inline unsigned int opal_bcopy_uicrc(const void *source, void *destination, size_t copylen,
size_t crclen)
{
return opal_bcopy_uicrc_partial(source, destination, copylen, crclen, CRC_INITIAL_REGISTER);
}
OPAL_DECLSPEC unsigned int opal_uicrc_partial(const void *source, size_t crclen,
unsigned int partial_crc);
static inline unsigned int opal_uicrc(const void *source, size_t crclen)
{
return opal_uicrc_partial(source, crclen, CRC_INITIAL_REGISTER);
}
END_C_DECLS
#endif
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