shithub: femtolisp

ref: 076b3b75c0f116421c17e7c2afd52b3079521ef4
dir: /bitvector.c/

View raw version 
#include "flisp.h"

uint32_t *
bitvector_resize(uint32_t *b, uint64_t oldsz, uint64_t newsz, int initzero)
{
	uint32_t *p;
	size_t sz = ((newsz+31)>>5) * sizeof(uint32_t);
	p = MEM_REALLOC(b, sz);
	if(p == nil)
		return nil;
	if(initzero && newsz>oldsz){
		size_t osz = ((oldsz+31)>>5) * sizeof(uint32_t);
		memset(&p[osz/sizeof(uint32_t)], 0, sz-osz);
	}
	return p;
}