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#include "ivec.h"
#include <stdio.h>
#include <stdlib.h>
void iv_free(ivec *v) {
free(v->_data);
v->_data = NULL;
v->_cap = 0;
v->len = 0;
}
static void _iv_ensure_init(ivec *v) {
if (v->_data)
return;
v->_cap = 16;
v->len = 0;
v->_data = malloc(v->_cap * sizeof(long long));
if (!v->_data) {
perror("_v_ensure_init.malloc");
abort();
}
}
static void _iv_ensure_capacity(ivec *v) {
_iv_ensure_init(v);
if (v->len >= v->_cap) {
v->_cap = (v->_cap == 0) ? 16 : v->_cap * 2;
long long *tmp = realloc(v->_data, v->_cap * sizeof(long long));
if (!tmp) {
perror("_v_ensure_capacity.realloc");
abort();
}
v->_data = tmp;
}
}
size_t iv_push(ivec *v, long long data) {
_iv_ensure_capacity(v);
v->_data[v->len++] = data;
return v->len - 1;
}
// getter
long long iv_get(ivec *v, size_t idx) {
_iv_ensure_init(v);
if (idx < v->len) {
return v->_data[idx];
}
return 0;
}
// O(n) shift delete
long long iv_rem_shift(ivec *v, size_t idx) {
_iv_ensure_init(v);
if (idx >= v->len)
return 0;
int old = v->_data[idx];
for (size_t j = idx; j + 1 < v->len; j++) {
v->_data[j] = v->_data[j + 1];
}
v->len--;
return old;
}
// O(1) swap delete
long long iv_rem(ivec *v, size_t idx) {
_iv_ensure_init(v);
if (idx >= v->len)
return 0;
int old = v->_data[idx];
v->_data[idx] = v->_data[--v->len];
return old;
}
// search
long long iv_has(ivec *v, long long x,
int (*comp)(const long long, const long long)) {
_iv_ensure_init(v);
if (!comp)
return 0;
for (size_t i = 0; i < v->len; i++) {
if (comp(v->_data[i], x) == 0) {
return v->_data[i];
}
}
return 0;
}
void iv_shrink(ivec *v) {
_iv_ensure_init(v);
size_t new_cap = v->len ? v->len : 1;
long long *tmp = realloc(v->_data, new_cap * sizeof(int)); // FIX
if (!tmp) {
perror("v_shrink.realloc");
abort();
}
v->_cap = new_cap;
v->_data = tmp;
}
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