1 /*
2 * Copyright (c) 2021 Calvin Rose
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to
6 * deal in the Software without restriction, including without limitation the
7 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
8 * sell copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
20 * IN THE SOFTWARE.
21 */
22
23 #ifndef JANET_AMALG
24 #include "features.h"
25 #include "vector.h"
26 #include "util.h"
27 #endif
28
29 /* Grow the buffer dynamically. Used for push operations. */
janet_v_grow(void * v,int32_t increment,int32_t itemsize)30 void *janet_v_grow(void *v, int32_t increment, int32_t itemsize) {
31 int32_t dbl_cur = (NULL != v) ? 2 * janet_v__cap(v) : 0;
32 int32_t min_needed = janet_v_count(v) + increment;
33 int32_t m = dbl_cur > min_needed ? dbl_cur : min_needed;
34 size_t newsize = ((size_t) itemsize) * m + sizeof(int32_t) * 2;
35 int32_t *p = (int32_t *) janet_srealloc(v ? janet_v__raw(v) : 0, newsize);
36 if (!v) p[1] = 0;
37 p[0] = m;
38 return p + 2;
39 }
40
41 /* Convert a buffer to normal allocated memory (forget capacity) */
janet_v_flattenmem(void * v,int32_t itemsize)42 void *janet_v_flattenmem(void *v, int32_t itemsize) {
43 int32_t *p;
44 if (NULL == v) return NULL;
45 size_t size = (size_t) itemsize * janet_v__cnt(v);
46 p = janet_malloc(size);
47 if (NULL != p) {
48 safe_memcpy(p, v, size);
49 return p;
50 } else {
51 JANET_OUT_OF_MEMORY;
52 }
53 }
54
55