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annotate val_array.c @ 832:76e588fedba8

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nvl: make nvpair_value return -ENOENT for NULL pairs This brings it in line with the rest of the nvpair_value_* functions. Signed-off-by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
author Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
date Mon, 01 Mar 2021 19:35:15 -0500
parents 2730e7a80abd
children
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1 /*
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2 * Copyright (c) 2018-2019 Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
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3 *
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4 * Permission is hereby granted, free of charge, to any person obtaining a copy
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5 * of this software and associated documentation files (the "Software"), to deal
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6 * in the Software without restriction, including without limitation the rights
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7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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8 * copies of the Software, and to permit persons to whom the Software is
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9 * furnished to do so, subject to the following conditions:
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10 *
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11 * The above copyright notice and this permission notice shall be included in
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12 * all copies or substantial portions of the Software.
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13 *
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14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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20 * SOFTWARE.
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21 */
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22
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23 #include <jeffpc/mem.h>
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24
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25 #include "val_impl.h"
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26
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27 static struct val *__val_alloc_array(struct val **vals, size_t nelem,
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28 bool dup, bool heap)
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29 {
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30 struct val *val;
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31 size_t i;
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32
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33 if (dup) {
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34 struct val **tmp;
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35
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36 /* no reason to ever duplicate a heap allocated array */
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37 ASSERT(!heap);
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38
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39 tmp = mem_reallocarray(NULL, nelem, sizeof(struct val *));
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40 if (!tmp) {
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41 val = ERR_PTR(-ENOMEM);
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42 goto err;
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43 }
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44
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45 /*
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46 * The multiplication can't overflow since the memory allocation
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47 * already checks for it.
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48 */
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49 memcpy(tmp, vals, sizeof(struct val *) * nelem);
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50
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51 /* switch to the new array & free it on error or 0 refcnt */
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52 vals = tmp;
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53 heap = true;
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54 }
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55
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56 val = __val_alloc(VT_ARRAY);
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57 if (IS_ERR(val))
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58 goto err;
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59
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60 val->_set_array.vals = vals;
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61 val->_set_array.nelem = nelem;
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62 val->static_alloc = !heap;
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63
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64 return val;
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65
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66 err:
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67 for (i = 0; i < nelem; i++)
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68 val_putref(vals[i]);
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69
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70 if (heap)
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71 free(vals);
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72
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73 return val;
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74 }
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75
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76 struct val *val_alloc_array(struct val **vals, size_t nelem)
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77 {
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78 return __val_alloc_array(vals, nelem, false, true);
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79 }
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80
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81 struct val *val_alloc_array_dup(struct val **vals, size_t nelem)
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82 {
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83 return __val_alloc_array(vals, nelem, true, false);
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84 }
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85
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86 struct val *val_alloc_array_static(struct val **vals, size_t nelem)
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87 {
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88 return __val_alloc_array(vals, nelem, false, false);
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89 }