plan9fox/sys/src/cmd/2c/bits.c
2011-03-30 19:35:09 +03:00

128 lines
1.3 KiB
C

#define EXTERN
#include "gc.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(unsigned n)
{
Bits c;
c = zbits;
c.b[n/32] = 1L << (n%32);
return c;
}
/*
int
bset(Bits a, unsigned n)
{
int i;
if(a.b[n/32] & (1L << (n%32)))
return 1;
return 0;
}
*/
int
Bconv(va_list *arg, Fconv *fp)
{
char str[STRINGSZ], ss[STRINGSZ], *s;
Bits bits;
int i;
str[0] = 0;
bits = va_arg(*arg, Bits);
while(bany(&bits)) {
i = bnum(bits);
if(str[0])
strcat(str, " ");
if(var[i].sym == S) {
sprint(ss, "$%ld", var[i].offset);
s = ss;
} else
s = var[i].sym->name;
if(strlen(str) + strlen(s) + 1 >= STRINGSZ)
break;
strcat(str, s);
bits.b[i/32] &= ~(1L << (i%32));
}
strconv(str, fp);
return 0;
}