48 lines
763 B
C
48 lines
763 B
C
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/* $NetBSD: bswap.c,v 1.1 1997/10/09 13:19:32 bouyer Exp $ */
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/*
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* Written by Manuel Bouyer <bouyer@netbsd.org>.
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* Public domain.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char *rcsid = "$NetBSD: bswap.c,v 1.1 1997/10/09 13:19:32 bouyer Exp $";
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#endif
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#include <sys/types.h>
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#undef bswap64
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#ifndef bswap16
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u_int16_t
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bswap16(x)
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u_int16_t x;
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{
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return ((x << 8) & 0xff00) | ((x >> 8) & 0x00ff);
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}
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#endif
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#ifndef bswap32
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u_int32_t
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bswap32(x)
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u_int32_t x;
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{
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return ((x << 24) & 0xff000000 ) |
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((x << 8) & 0x00ff0000 ) |
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((x >> 8) & 0x0000ff00 ) |
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((x >> 24) & 0x000000ff );
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}
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#endif
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u_int64_t
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bswap64(x)
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u_int64_t x;
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{
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u_int32_t *p = (u_int32_t*)&x;
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u_int32_t t;
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t = bswap32(p[0]);
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p[0] = bswap32(p[1]);
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p[1] = t;
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return x;
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}
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