mirror of
https://github.com/janet-lang/janet
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102 lines
3.1 KiB
C
102 lines
3.1 KiB
C
/*
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* Copyright (c) 2017 Calvin Rose
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <dst/dst.h>
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#include "gc.h"
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/* Iniializes an array */
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DstArray *dst_array_init(DstArray *array, int32_t capacity) {
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DstValue *data = NULL;
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if (capacity > 0) {
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data = (DstValue *) malloc(sizeof(DstValue) * capacity);
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if (NULL == data) {
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DST_OUT_OF_MEMORY;
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}
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}
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array->count = 0;
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array->capacity = capacity;
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array->data = data;
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return array;
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}
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void dst_array_deinit(DstArray *array) {
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free(array->data);
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}
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/* Creates a new array */
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DstArray *dst_array(int32_t capacity) {
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DstArray *array = dst_gcalloc(DST_MEMORY_ARRAY, sizeof(DstArray));
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return dst_array_init(array, capacity);
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}
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/* Ensure the array has enough capacity for elements */
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void dst_array_ensure(DstArray *array, int32_t capacity) {
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DstValue *newData;
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DstValue *old = array->data;
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if (capacity <= array->capacity) return;
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newData = realloc(old, capacity * sizeof(DstValue));
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if (NULL == newData) {
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DST_OUT_OF_MEMORY;
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}
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array->data = newData;
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array->capacity = capacity;
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}
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/* Set the count of an array. Extend with nil if needed. */
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void dst_array_setcount(DstArray *array, int32_t count) {
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if (count < 0)
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return;
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if (count > array->count) {
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dst_array_ensure(array, count + 1);
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dst_memempty(array->data + array->count, count - array->count);
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}
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array->count = count;
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}
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/* Push a value to the top of the array */
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void dst_array_push(DstArray *array, DstValue x) {
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int32_t newcount = array->count + 1;
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if (newcount >= array->capacity) {
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dst_array_ensure(array, newcount * 2);
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}
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array->data[array->count] = x;
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array->count = newcount;
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}
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/* Pop a value from the top of the array */
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DstValue dst_array_pop(DstArray *array) {
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if (array->count) {
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return array->data[--array->count];
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} else {
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return dst_wrap_nil();
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}
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}
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/* Look at the last value in the array */
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DstValue dst_array_peek(DstArray *array) {
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if (array->count) {
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return array->data[array->count - 1];
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} else {
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return dst_wrap_nil();
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}
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}
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