plan9fox/sys/src/cmd/cc/bits.c
2011-03-30 19:35:09 +03:00

90 lines
850 B
C

#include "cc.h"
Bits
bor(Bits a, Bits b)
{
Bits c;
int i;
for(i=0; i<BITS; i++)
c.b[i] = a.b[i] | b.b[i];
return c;
}
Bits
band(Bits a, Bits b)
{
Bits c;
int i;
for(i=0; i<BITS; i++)
c.b[i] = a.b[i] & b.b[i];
return c;
}
/*
Bits
bnot(Bits a)
{
Bits c;
int i;
for(i=0; i<BITS; i++)
c.b[i] = ~a.b[i];
return c;
}
*/
int
bany(Bits *a)
{
int i;
for(i=0; i<BITS; i++)
if(a->b[i])
return 1;
return 0;
}
int
beq(Bits a, Bits b)
{
int i;
for(i=0; i<BITS; i++)
if(a.b[i] != b.b[i])
return 0;
return 1;
}
int
bnum(Bits a)
{
int i;
long b;
for(i=0; i<BITS; i++)
if(b = a.b[i])
return 32*i + bitno(b);
diag(Z, "bad in bnum");
return 0;
}
Bits
blsh(uint n)
{
Bits c;
c = zbits;
c.b[n/32] = 1L << (n%32);
return c;
}
int
bset(Bits a, uint n)
{
if(a.b[n/32] & (1L << (n%32)))
return 1;
return 0;
}