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1 /* |
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2 * buf-shrink.c -- simple string buffer for C |
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3 * |
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4 * Copyright (c) 2019-2020 David Demelier <markand@malikania.fr> |
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5 * |
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6 * Permission to use, copy, modify, and/or distribute this software for any |
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7 * purpose with or without fee is hereby granted, provided that the above |
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8 * copyright notice and this permission notice appear in all copies. |
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9 * |
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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17 */ |
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18 |
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19 #include <assert.h> |
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20 #include <stdlib.h> |
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21 |
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22 #include "buf.h" |
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23 |
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24 bool |
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25 buf_shrink(struct buf *b) |
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26 { |
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27 assert(b); |
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28 |
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29 void *newptr; |
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30 |
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31 if (b->length == 0) { |
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32 free(b->data); |
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33 b->data = NULL; |
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34 b->length = b->capacity = 0; |
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35 return true; |
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36 } |
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37 |
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38 if (!(newptr = BUF_REALLOC(b->data, b->length + 1))) |
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39 return false; |
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40 |
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41 b->data = newptr; |
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42 b->capacity = b->length; |
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43 |
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44 return true; |
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45 } |