[5443] | 1 | //kstore.c: |
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| 2 | |
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| 3 | /* |
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| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2012 |
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| 5 | * |
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| 6 | * This file is part of libroar a part of RoarAudio, |
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| 7 | * a cross-platform sound system for both, home and professional use. |
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| 8 | * See README for details. |
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| 9 | * |
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| 10 | * This file is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU General Public License version 3 |
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| 12 | * as published by the Free Software Foundation. |
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| 13 | * |
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| 14 | * libroar is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with this software; see the file COPYING. If not, write to |
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| 21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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| 22 | * Boston, MA 02110-1301, USA. |
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| 23 | * |
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| 24 | * NOTE for everyone want's to change something and send patches: |
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| 25 | * read README and HACKING! There a addition information on |
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| 26 | * the license of this document you need to read before you send |
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| 27 | * any patches. |
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| 28 | * |
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| 29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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| 30 | * or libpulse*: |
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| 31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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| 32 | * and are therefore GPL. Because of this it may be illigal to use |
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| 33 | * them with any software that uses libesd, libartsc or libpulse*. |
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| 34 | */ |
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| 35 | |
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| 36 | #include "libroar.h" |
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| 37 | |
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| 38 | #define _LEN_DEFAULT 16 |
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| 39 | |
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| 40 | struct binkv { |
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| 41 | const char * key; |
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| 42 | void * value; |
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| 43 | }; |
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| 44 | |
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| 45 | struct roar_kstore { |
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| 46 | size_t refc; |
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| 47 | int (*ref)(void *); |
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| 48 | int (*unref)(void *); |
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| 49 | const char * (*get_key)(void *); |
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| 50 | size_t len; |
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| 51 | struct binkv * kv; |
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| 52 | }; |
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| 53 | |
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| 54 | struct roar_kstore * roar_kstore_new(ssize_t len, |
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| 55 | int (*ref)(void *), int (*unref)(void *), |
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| 56 | const char * (*get_key)(void *)) { |
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| 57 | struct roar_kstore * ret = roar_mm_malloc(sizeof(struct roar_kstore)); |
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| 58 | int err; |
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| 59 | |
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| 60 | if ( ret == NULL ) |
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| 61 | return NULL; |
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| 62 | |
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| 63 | memset(ret, 0, sizeof(struct roar_kstore)); |
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| 64 | |
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| 65 | if ( len == -1 ) |
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| 66 | len = _LEN_DEFAULT; |
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| 67 | |
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| 68 | ret->kv = roar_mm_malloc(len*sizeof(struct binkv)); |
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| 69 | if ( ret->kv == NULL ) { |
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| 70 | err = roar_error; |
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| 71 | roar_mm_free(ret); |
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| 72 | roar_error = err; |
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| 73 | return NULL; |
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| 74 | } |
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| 75 | |
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| 76 | memset(ret->kv, 0, len*sizeof(struct binkv)); |
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| 77 | |
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| 78 | ret->refc = 1; |
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| 79 | ret->ref = ref; |
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| 80 | ret->unref = unref; |
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| 81 | ret->get_key = get_key; |
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| 82 | ret->len = len; |
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| 83 | |
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| 84 | return ret; |
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| 85 | } |
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| 86 | |
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| 87 | int roar_kstore_ref(struct roar_kstore * store) { |
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| 88 | if ( store == NULL ) { |
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| 89 | roar_err_set(ROAR_ERROR_FAULT); |
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| 90 | return -1; |
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| 91 | } |
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| 92 | |
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| 93 | store->refc++; |
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| 94 | |
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| 95 | return 0; |
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| 96 | } |
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| 97 | |
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| 98 | int roar_kstore_unref(struct roar_kstore * store) { |
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| 99 | size_t i; |
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| 100 | |
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| 101 | if ( store == NULL ) { |
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| 102 | roar_err_set(ROAR_ERROR_FAULT); |
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| 103 | return -1; |
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| 104 | } |
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| 105 | |
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| 106 | store->refc--; |
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| 107 | |
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| 108 | if ( store->refc ) |
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| 109 | return 0; |
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| 110 | |
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| 111 | if ( store->unref != NULL ) { |
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| 112 | for (i = 0; i < store->len; i++) { |
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| 113 | if ( store->kv[i].key == NULL ) |
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| 114 | continue; |
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| 115 | |
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| 116 | if ( store->unref(store->kv[i].value) == -1 ) |
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| 117 | return -1; |
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| 118 | store->kv[i].key = NULL; |
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| 119 | store->kv[i].value = NULL; |
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| 120 | } |
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| 121 | } |
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| 122 | |
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| 123 | roar_mm_free(store->kv); |
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| 124 | roar_mm_free(store); |
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| 125 | |
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| 126 | return 0; |
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| 127 | } |
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| 128 | |
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| 129 | int roar_kstore_add(struct roar_kstore * store, void * obj, const char * key) { |
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| 130 | size_t i; |
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| 131 | |
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| 132 | if ( store == NULL ) { |
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| 133 | roar_err_set(ROAR_ERROR_FAULT); |
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| 134 | return -1; |
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| 135 | } |
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| 136 | |
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| 137 | if ( key == NULL && store->get_key != NULL ) |
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| 138 | key = store->get_key(obj); |
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| 139 | |
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| 140 | if ( key == NULL ) { |
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| 141 | roar_err_set(ROAR_ERROR_INVAL); |
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| 142 | return -1; |
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| 143 | } |
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| 144 | |
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| 145 | for (i = 0; i < store->len; i++) { |
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| 146 | if ( store->kv[i].key == NULL ) |
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| 147 | continue; |
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| 148 | if ( !strcmp(store->kv[i].key, key) ) { |
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| 149 | roar_err_set(ROAR_ERROR_EXIST); |
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| 150 | return -1; |
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| 151 | } |
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| 152 | } |
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| 153 | |
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| 154 | for (i = 0; i < store->len; i++) { |
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| 155 | if ( store->kv[i].key != NULL ) |
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| 156 | continue; |
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| 157 | if ( store->ref != NULL ) |
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| 158 | if ( store->ref(obj) == -1 ) |
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| 159 | return -1; |
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| 160 | store->kv[i].key = key; |
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| 161 | store->kv[i].value = obj; |
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| 162 | return 0; |
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| 163 | } |
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| 164 | |
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| 165 | roar_err_set(ROAR_ERROR_NOSPC); |
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| 166 | return -1; |
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| 167 | } |
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| 168 | |
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| 169 | void * roar_kstore_get(struct roar_kstore * store, const char * key) { |
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| 170 | size_t i; |
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| 171 | |
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| 172 | if ( store == NULL ) { |
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| 173 | roar_err_set(ROAR_ERROR_FAULT); |
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| 174 | return NULL; |
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| 175 | } |
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| 176 | |
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| 177 | for (i = 0; i < store->len; i++) { |
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| 178 | if ( store->kv[i].key != NULL && !strcmp(store->kv[i].key, key) ) { |
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| 179 | if ( store->ref != NULL ) |
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| 180 | if ( store->ref(store->kv[i].value) == -1 ) |
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| 181 | return NULL; |
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| 182 | return store->kv[i].value; |
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| 183 | } |
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| 184 | } |
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| 185 | |
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| 186 | roar_err_set(ROAR_ERROR_NOENT); |
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| 187 | return NULL; |
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| 188 | } |
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| 189 | |
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| 190 | int roar_kstore_delete(struct roar_kstore * store, const char * key) { |
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| 191 | size_t i; |
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| 192 | |
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| 193 | if ( store == NULL ) { |
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| 194 | roar_err_set(ROAR_ERROR_FAULT); |
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| 195 | return -1; |
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| 196 | } |
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| 197 | |
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| 198 | for (i = 0; i < store->len; i++) { |
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| 199 | if ( store->kv[i].key != NULL && !strcmp(store->kv[i].key, key) ) { |
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| 200 | if ( store->unref != NULL ) |
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| 201 | if ( store->unref(store->kv[i].value) == -1 ) |
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| 202 | return -1; |
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| 203 | store->kv[i].key = NULL; |
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| 204 | store->kv[i].value = NULL; |
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| 205 | return 0; |
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| 206 | } |
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| 207 | } |
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| 208 | |
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| 209 | roar_err_set(ROAR_ERROR_NOENT); |
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| 210 | return -1; |
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| 211 | } |
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| 212 | |
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| 213 | //ll |
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