mirror of
https://github.com/janet-lang/janet
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77 lines
2.5 KiB
C
77 lines
2.5 KiB
C
/*
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* Copyright (c) 2018 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 "vector.h"
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/* Grow the buffer dynamically. Used for push operations. */
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void *dst_v_grow(void *v, int32_t increment, int32_t itemsize) {
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int32_t dbl_cur = (NULL != v) ? 2 * dst_v__cap(v) : 0;
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int32_t min_needed = dst_v_count(v) + increment;
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int32_t m = dbl_cur > min_needed ? dbl_cur : min_needed;
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int32_t *p = (int32_t *) realloc(v ? dst_v__raw(v) : 0, itemsize * m + sizeof(int32_t)*2);
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if (NULL != p) {
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if (!v) p[1] = 0;
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p[0] = m;
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return p + 2;
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} else {
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{
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DST_OUT_OF_MEMORY;
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}
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return (void *) (2 * sizeof(int32_t));
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}
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}
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/* Clone a buffer. */
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void *dst_v_copymem(void *v, int32_t itemsize) {
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int32_t *p;
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if (NULL == v) return NULL;
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p = malloc(2 * sizeof(int32_t) + itemsize * dst_v__cap(v));
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if (NULL != p) {
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memcpy(p, dst_v__raw(v), 2 * sizeof(int32_t) + itemsize * dst_v__cnt(v));
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return p + 2;
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} else {
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{
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DST_OUT_OF_MEMORY;
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}
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return (void *) (2 * sizeof(int32_t));
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}
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}
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/* Convert a buffer to normal allocated memory (forget capacity) */
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void *dst_v_flattenmem(void *v, int32_t itemsize) {
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int32_t *p;
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int32_t sizen;
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if (NULL == v) return NULL;
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sizen = itemsize * dst_v__cnt(v);
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p = malloc(sizen);
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if (NULL != p) {
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memcpy(p, v, sizen);
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return p;
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} else {
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{
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DST_OUT_OF_MEMORY;
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}
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return NULL;
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}
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}
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