#pragma prototyped
#define att_description \
"The system 5 release 4 checksum. This is the default for \bsum\b \
when \bgetconf UNIVERSE\b is \batt\b. This is the only true sum; \
all of the other methods are order dependent."
#define att_options 0
#define att_match "att|sys5|s5|default"
#define att_open long_open
#define att_init long_init
#define att_print long_print
#define att_data long_data
#define att_scale 512
static int
att_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 += *b++;
((Integral_t*)p)->sum = c;
return 0;
}
static int
att_done(Sum_t* p)
{
register uint32_t c = ((Integral_t*)p)->sum;
c = (c & 0xffff) + ((c >> 16) & 0xffff);
c = (c & 0xffff) + (c >> 16);
((Integral_t*)p)->sum = c & 0xffff;
return short_done(p);
}