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/*-
* Copyright (c) 2002 Poul-Henning Kamp
* Copyright (c) 2002 Networks Associates Technology, Inc.
* All rights reserved.
*
* This software was developed for the FreeBSD Project by Poul-Henning Kamp
* and NAI Labs, the Security Research Division of Network Associates, Inc.
* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
* DARPA CHATS research program.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The names of the authors may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
/*
* This file contains routines to pack and unpack integerfields of varying
* width and endianess with. Ideally the C language would have this built
* in but I guess Dennis and Brian forgot that back in the early 70ies.
*
* The function names are systematic: g_{enc|dec}_{be|le}%d
* enc -> encode
* dec -> decode
* be -> big endian
* le -> little endian
* %d -> width in bytes
*
* Please keep the functions sorted:
* decode before encode
* big endian before little endian
* small width before larger width
* (this happens to be alphabetically)
*/
#include <sys/param.h>
#ifdef _KERNEL
#include <sys/malloc.h>
#include <sys/systm.h>
#endif
#include <sys/time.h>
#include <geom/geom.h>
uint16_t
g_dec_be2(const u_char *p)
{
return((p[0] << 8) | p[1]);
}
uint32_t
g_dec_be4(const u_char *p)
{
return((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
}
uint16_t
g_dec_le2(const u_char *p)
{
return((p[1] << 8) | p[0]);
}
uint32_t
g_dec_le4(const u_char *p)
{
return((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
}
uint64_t
g_dec_le8(const u_char *p)
{
return(g_dec_le4(p) | ((uint64_t)(g_dec_le4(p + 4)) << 32));
}
void
g_enc_le2(u_char *p, uint16_t u)
{
p[0] = u & 0xff;
p[1] = (u >> 8) & 0xff;
}
void
g_enc_le4(u_char *p, uint32_t u)
{
p[0] = u & 0xff;
p[1] = (u >> 8) & 0xff;
p[2] = (u >> 16) & 0xff;
p[3] = (u >> 24) & 0xff;
}
void
g_enc_le8(u_char *p, uint64_t u)
{
g_enc_le4(p, u);
g_enc_le4(p + 4, u >> 32);
}
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