#include <assert.h>
#include "safe.h"
#include "vector.h"

struct vector *vectorCreate() {
	struct vector *v = (struct vector *)safeMalloc(sizeof(struct vector));
	v->a = (int *)safeMalloc(sizeof(int));
	v->size = 1;
	v->length = 0;
	return v;
}

struct vector *vectorDelete(struct vector *v) {
	if(v) {
		free(v->a);
		free(v);
	}
	return (struct vector *)0;
}

void vectorSet(struct vector *v, int index, int value) {
	assert(v && index >= 0);

	if(index >= v->size) {
		do
			v->size *= 2;
		while(index >= v->size);
		v->a = (int *)safeRealloc((void *)v->a, v->size*sizeof(int));
	}

	while(index >= v->length) {
		v->a[v->length] = 0;
		v->length++;
	}

	v->a[index] = value;
}

int vectorGet(struct vector *v, int index) {
	assert(v && index >= 0 && index < v->length);
	return v->a[index];
}

int vectorLength(struct vector *v) {
	assert(v);
	return v->length;
}