shithub: asif

ref: 75f9f90edfa9cdb2804dce926a2a1dabb27d5a88
dir: /varray.c/

#include <u.h>
#include <libc.h>
#include "asif.h"

enum{
	VAinc = 2048,
};

void
vfree(VArray *v)
{
	if(v == nil)
		return;
	free(v->p);
	free(v);
}

void
vnuke(VArray *v)
{
	if(v == nil)
		return;
	memset(v->p, 0, v->bufsize);
	v->n = 0;
}

void
vinsert(VArray *v, char *u)
{
	int off;

	assert(v != nil && u != nil);
	off = v->n * v->elsize;
	if(v->n++ >= v->vsize){
		v->p = erealloc(v->p, v->bufsize + VAinc * v->elsize, v->bufsize);
		v->bufsize += VAinc * v->elsize;
		v->vsize += VAinc;
	}
	memcpy((char*)v->p+off, u, v->elsize);
}

VArray*
valloc(ulong n, int elsize)
{
	VArray *v;

	v = emalloc(sizeof *v);
	v->n = 0;
	v->elsize = elsize;
	if(n <= 0)
		n = VAinc;
	v->vsize = MIN(n, VAinc);
	v->bufsize = v->vsize * elsize;
	v->p = emalloc(v->bufsize);
	return v;
}