125 lines
3.2 KiB
C
125 lines
3.2 KiB
C
/*-
|
|
* 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);
|
|
}
|