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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