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/****************************************************************
* acm_endian.h
*
* Copyright (C) 2005 IBM Corporation
*
* Author:
* Stefan Berger <stefanb@watson.ibm.com>
*
* Contributions:
* Reiner Sailer <sailer@watson.ibm.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, version 2 of the
* License.
*
* sHype header file defining endian-dependent functions for the
* big-endian policy interface
*
*/
#ifndef _ACM_ENDIAN_H
#define _ACM_ENDIAN_H
/* don't use these functions in performance critical sections! */
/* set during initialization by testing */
extern u8 little_endian;
static inline u32 ntohl(u32 x)
{
if (little_endian)
return
( (((x) >> 24) & 0xff )|
(((x) >> 8) & 0xff00 )|
(((x) << 8) & 0xff0000 )|
(((x) << 24) & 0xff000000) );
else
return x;
}
static inline u16 ntohs(u16 x)
{
if (little_endian)
return
( (((x) >> 8) & 0xff )|
(((x) << 8) & 0xff00 ) );
else
return x;
}
#define htonl(x) ntohl(x)
#define htons(x) ntohs(x)
static inline void arrcpy16(u16 *dest, const u16 *src, size_t n)
{
unsigned int i = 0;
while (i < n) {
dest[i] = htons(src[i]);
i++;
}
}
static inline void arrcpy32(u32 *dest, const u32 *src, size_t n)
{
unsigned int i = 0;
while (i < n) {
dest[i] = htonl(src[i]);
i++;
}
}
static inline void arrcpy(void *dest, const void *src, unsigned int elsize, size_t n)
{
switch (elsize) {
case sizeof(u16):
arrcpy16((u16 *)dest, (u16 *)src, n);
break;
case sizeof(u32):
arrcpy32((u32 *)dest, (u32 *)src, n);
break;
default:
memcpy(dest, src, elsize*n);
}
}
#endif
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