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/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1996-2009 AT&T Intellectual Property *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.opensource.org/licenses/cpl1.0.txt *
* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
/*
* bsd
*/
#define bsd_description \
"The BSD checksum."
#define bsd_options 0
#define bsd_match "bsd|ucb"
#define bsd_open long_open
#define bsd_init long_init
#define bsd_done short_done
#define bsd_print long_print
#define bsd_data long_data
#define bsd_scale 1024
static int
bsd_block(register Sum_t* p, const void* s, size_t n)
{
register uint32_t c = ((Integral_t*)p)->sum;
register unsigned char* b = (unsigned char*)s;
register unsigned char* e = b + n;
while (b < e)
c = ((c >> 1) + *b++ + ((c & 01) ? 0x8000 : 0)) & 0xffff;
((Integral_t*)p)->sum = c;
return 0;
}
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