82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include "libp2p/utils/vector.h"
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struct Libp2pVector* libp2p_utils_vector_new(int initial_size)
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{
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struct Libp2pVector* v = (struct Libp2pVector*)malloc(sizeof(struct Libp2pVector));
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v->capacity = initial_size;
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v->total = 0;
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v->items = malloc(sizeof(void *) * v->capacity);
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return v;
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}
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int libp2p_utils_vector_total(struct Libp2pVector *v)
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{
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return v->total;
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}
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static void libp2p_utils_vector_resize(struct Libp2pVector *v, int capacity)
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{
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#ifdef DEBUG_ON
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printf("vector_resize: %d to %d\n", v->capacity, capacity);
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#endif
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void const** items = realloc(v->items, sizeof(void *) * capacity);
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if (items) {
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v->items = items;
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v->capacity = capacity;
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}
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}
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/****
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* Add an item to the vector. NOTE: This does not copy the item
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* @param v the vector to add to
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* @param item the item to add
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*/
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int libp2p_utils_vector_add(struct Libp2pVector *v, const void *item)
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{
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if (v->capacity == v->total)
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libp2p_utils_vector_resize(v, v->capacity * 2);
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v->items[v->total++] = item;
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return v->total;
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}
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void libp2p_utils_vector_set(struct Libp2pVector *v, int index, void *item)
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{
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if (index >= 0 && index < v->total)
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v->items[index] = item;
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}
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const void *libp2p_utils_vector_get(struct Libp2pVector *v, int index)
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{
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if (index >= 0 && index < v->total)
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return v->items[index];
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return NULL;
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}
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void libp2p_utils_vector_delete(struct Libp2pVector *v, int index)
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{
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if (index < 0 || index >= v->total)
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return;
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v->items[index] = NULL;
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for (int i = 0; i < v->total - 1; i++) {
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v->items[i] = v->items[i + 1];
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v->items[i + 1] = NULL;
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}
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v->total--;
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if (v->total > 0 && v->total == v->capacity / 4)
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libp2p_utils_vector_resize(v, v->capacity / 2);
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}
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void libp2p_utils_vector_free(struct Libp2pVector *v)
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{
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free(v->items);
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free(v);
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}
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