Thu, 04 Oct 2012 18:46:57 +0200
added map clone
olaf@20 | 1 | /* |
olaf@20 | 2 | * |
olaf@20 | 3 | */ |
olaf@2 | 4 | |
olaf@20 | 5 | #include <stdlib.h> |
olaf@20 | 6 | #include <string.h> |
olaf@20 | 7 | |
olaf@20 | 8 | #include "map.h" |
olaf@20 | 9 | |
olaf@20 | 10 | UcxMap *ucx_map_new(size_t size) { |
olaf@20 | 11 | UcxMap *map = (UcxMap*)malloc(sizeof(UcxMap)); |
olaf@20 | 12 | if(map == NULL) { |
olaf@20 | 13 | return NULL; |
olaf@20 | 14 | } |
olaf@20 | 15 | |
universe@29 | 16 | map->map = (UcxMapElement**)calloc(size, sizeof(UcxMapElement*)); |
olaf@20 | 17 | if(map->map == NULL) { |
olaf@20 | 18 | free(map); |
olaf@20 | 19 | return NULL; |
olaf@20 | 20 | } |
olaf@20 | 21 | map->size = size; |
olaf@20 | 22 | |
olaf@20 | 23 | return map; |
olaf@20 | 24 | } |
olaf@20 | 25 | |
universe@29 | 26 | void ucx_map_free(UcxMap *map) { |
universe@29 | 27 | for (size_t n = 0 ; n < map->size ; n++) { |
universe@29 | 28 | UcxMapElement *elem = map->map[n]; |
universe@29 | 29 | if (elem != NULL) { |
universe@29 | 30 | do { |
universe@29 | 31 | UcxMapElement *next = elem->next; |
olaf@30 | 32 | free(elem->key.data); |
universe@29 | 33 | free(elem); |
universe@29 | 34 | elem = next; |
universe@29 | 35 | } while (elem != NULL); |
universe@29 | 36 | } |
universe@29 | 37 | } |
olaf@30 | 38 | free(map->map); |
universe@29 | 39 | free(map); |
universe@29 | 40 | } |
universe@29 | 41 | |
olaf@44 | 42 | UcxMap *ucx_map_clone(UcxMap *map, copy_func fnc, void *data) { |
olaf@44 | 43 | UcxMap *newmap = ucx_map_new(map->size); |
olaf@44 | 44 | UcxMapIterator i = ucx_map_iterator(map); |
olaf@44 | 45 | void *value; |
olaf@44 | 46 | UCX_MAP_FOREACH(value, i) { |
olaf@44 | 47 | ucx_map_put(newmap, i.cur->key, fnc ? fnc(value, data) : value); |
olaf@44 | 48 | } |
olaf@44 | 49 | return newmap; |
olaf@44 | 50 | } |
olaf@44 | 51 | |
olaf@20 | 52 | int ucx_map_put(UcxMap *map, UcxKey key, void *data) { |
olaf@20 | 53 | if(key.hash == 0) { |
olaf@20 | 54 | key.hash = ucx_hash((char*)key.data, key.len); |
olaf@20 | 55 | } |
olaf@20 | 56 | |
universe@29 | 57 | size_t slot = key.hash%map->size; |
universe@29 | 58 | UcxMapElement *elm = map->map[slot]; |
universe@29 | 59 | UcxMapElement *prev = NULL; |
universe@29 | 60 | |
universe@29 | 61 | while (elm != NULL && elm->key.hash < key.hash) { |
universe@29 | 62 | prev = elm; |
universe@29 | 63 | elm = elm->next; |
universe@29 | 64 | } |
universe@29 | 65 | |
universe@29 | 66 | if (elm == NULL || elm->key.hash != key.hash) { |
olaf@20 | 67 | UcxMapElement *e = (UcxMapElement*)malloc(sizeof(UcxMapElement)); |
olaf@20 | 68 | if(e == NULL) { |
olaf@20 | 69 | return -1; |
olaf@20 | 70 | } |
olaf@30 | 71 | e->key.data = NULL; |
universe@29 | 72 | if (prev == NULL) { |
universe@29 | 73 | map->map[slot] = e; |
universe@29 | 74 | } else { |
universe@29 | 75 | prev->next = e; |
universe@29 | 76 | } |
universe@29 | 77 | e->next = elm; |
olaf@20 | 78 | elm = e; |
olaf@20 | 79 | } |
universe@29 | 80 | |
olaf@30 | 81 | if(elm->key.data == NULL) { |
olaf@30 | 82 | void *kd = malloc(key.len); |
olaf@30 | 83 | if (kd == NULL) { |
olaf@30 | 84 | return -1; |
olaf@30 | 85 | } |
olaf@30 | 86 | memcpy(kd, key.data, key.len); |
olaf@30 | 87 | key.data = kd; |
olaf@30 | 88 | elm->key = key; |
olaf@30 | 89 | } |
olaf@20 | 90 | elm->data = data; |
olaf@20 | 91 | |
olaf@20 | 92 | return 0; |
olaf@20 | 93 | } |
olaf@20 | 94 | |
olaf@20 | 95 | void* ucx_map_get(UcxMap *map, UcxKey key) { |
olaf@20 | 96 | if(key.hash == 0) { |
olaf@20 | 97 | key.hash = ucx_hash((char*)key.data, key.len); |
olaf@20 | 98 | } |
olaf@20 | 99 | |
universe@29 | 100 | UcxMapElement *elm = map->map[key.hash%map->size]; |
universe@29 | 101 | while (elm != NULL && elm->key.hash <= key.hash) { |
olaf@20 | 102 | if(elm->key.hash == key.hash) { |
olaf@20 | 103 | int n = (key.len > elm->key.len) ? elm->key.len : key.len; |
universe@29 | 104 | if (memcmp(elm->key.data, key.data, n) == 0) { |
olaf@20 | 105 | return elm->data; |
olaf@20 | 106 | } |
olaf@20 | 107 | } |
olaf@20 | 108 | elm = elm->next; |
olaf@20 | 109 | } |
olaf@20 | 110 | |
olaf@20 | 111 | return NULL; |
olaf@20 | 112 | } |
olaf@20 | 113 | |
olaf@20 | 114 | UcxKey ucx_key(void *data, size_t len) { |
olaf@20 | 115 | UcxKey key; |
olaf@20 | 116 | key.data = data; |
olaf@20 | 117 | key.len = len; |
olaf@20 | 118 | key.hash = ucx_hash(data, len); |
olaf@20 | 119 | return key; |
olaf@20 | 120 | } |
olaf@20 | 121 | |
olaf@20 | 122 | |
olaf@20 | 123 | int ucx_hash(char *data, size_t len) { |
olaf@20 | 124 | /* murmur hash 2 */ |
olaf@20 | 125 | |
olaf@20 | 126 | int m = 0x5bd1e995; |
olaf@20 | 127 | int r = 24; |
olaf@20 | 128 | |
olaf@20 | 129 | int h = 25 ^ len; |
olaf@20 | 130 | |
olaf@20 | 131 | int i = 0; |
olaf@20 | 132 | while (len >= 4) { |
olaf@20 | 133 | int k = data[i + 0] & 0xFF; |
olaf@20 | 134 | k |= (data[i + 1] & 0xFF) << 8; |
olaf@20 | 135 | k |= (data[i + 2] & 0xFF) << 16; |
olaf@20 | 136 | k |= (data[i + 3] & 0xFF) << 24; |
olaf@20 | 137 | |
olaf@20 | 138 | k *= m; |
olaf@20 | 139 | k ^= k >> r; |
olaf@20 | 140 | k *= m; |
olaf@20 | 141 | |
olaf@20 | 142 | h *= m; |
olaf@20 | 143 | h ^= k; |
olaf@20 | 144 | |
olaf@20 | 145 | i += 4; |
olaf@20 | 146 | len -= 4; |
olaf@20 | 147 | } |
olaf@20 | 148 | |
olaf@20 | 149 | switch (len) { |
olaf@20 | 150 | case 3: h ^= (data[i + 2] & 0xFF) << 16; |
universe@38 | 151 | /* no break */ |
olaf@20 | 152 | case 2: h ^= (data[i + 1] & 0xFF) << 8; |
universe@38 | 153 | /* no break */ |
olaf@20 | 154 | case 1: h ^= (data[i + 0] & 0xFF); h *= m; |
universe@38 | 155 | /* no break */ |
olaf@20 | 156 | } |
olaf@20 | 157 | |
olaf@20 | 158 | h ^= h >> 13; |
olaf@20 | 159 | h *= m; |
olaf@20 | 160 | h ^= h >> 15; |
olaf@20 | 161 | |
olaf@20 | 162 | return h; |
olaf@20 | 163 | } |
olaf@31 | 164 | |
olaf@31 | 165 | UcxMapIterator ucx_map_iterator(UcxMap *map) { |
olaf@31 | 166 | UcxMapIterator i; |
olaf@31 | 167 | i.map = map; |
olaf@31 | 168 | i.cur = NULL; |
olaf@31 | 169 | i.index = 0; |
olaf@31 | 170 | return i; |
olaf@31 | 171 | } |
olaf@31 | 172 | |
olaf@31 | 173 | int ucx_map_iter_next(UcxMapIterator *i, void **elm) { |
olaf@31 | 174 | UcxMapElement *e = i->cur; |
olaf@31 | 175 | |
olaf@31 | 176 | if(e == NULL) { |
olaf@31 | 177 | e = i->map->map[0]; |
olaf@31 | 178 | } else { |
olaf@31 | 179 | e = e->next; |
olaf@31 | 180 | } |
olaf@31 | 181 | |
olaf@31 | 182 | while(i->index < i->map->size) { |
olaf@31 | 183 | if(e != NULL) { |
olaf@31 | 184 | if(e->data != NULL) { |
olaf@31 | 185 | i->cur = e; |
olaf@31 | 186 | *elm = e->data; |
olaf@31 | 187 | return 0; |
olaf@31 | 188 | } |
olaf@31 | 189 | |
olaf@31 | 190 | e = e->next; |
olaf@31 | 191 | } else { |
olaf@31 | 192 | i->index++; |
olaf@31 | 193 | |
olaf@31 | 194 | if(i->index < i->map->size) { |
olaf@31 | 195 | e = i->map->map[i->index]; |
olaf@31 | 196 | } |
olaf@31 | 197 | } |
olaf@31 | 198 | } |
olaf@31 | 199 | |
olaf@31 | 200 | return 1; |
olaf@31 | 201 | } |
universe@42 | 202 | |
universe@42 | 203 | int ucx_map_load(UcxMap *map, FILE *f) { |
universe@42 | 204 | |
universe@43 | 205 | int c; int r, n; |
universe@42 | 206 | |
universe@42 | 207 | char *key, *value; |
universe@42 | 208 | |
universe@43 | 209 | while ((c = fgetc(f)) > 0) { |
universe@42 | 210 | /* Discard leading spaces and comments */ |
universe@43 | 211 | if (c < 33) continue; |
universe@42 | 212 | if (c == '#' || c == '!') { |
universe@42 | 213 | while ((c = (char) fgetc(f)) > 0) { |
universe@42 | 214 | if (c == '\n') break; |
universe@42 | 215 | } |
universe@42 | 216 | continue; |
universe@42 | 217 | } |
universe@42 | 218 | |
universe@42 | 219 | /* read into key buffer */ |
universe@42 | 220 | n = 16; |
universe@42 | 221 | key = malloc(n); |
universe@42 | 222 | r = 0; |
universe@42 | 223 | do { |
universe@42 | 224 | if (c == '=') break; |
universe@42 | 225 | if (r > n - 2) { |
universe@42 | 226 | n *= 2; |
universe@42 | 227 | key = realloc(key, n); |
universe@42 | 228 | } |
universe@42 | 229 | key[r] = c; |
universe@42 | 230 | r++; |
universe@43 | 231 | } while ((c = fgetc(f)) > 0); |
universe@43 | 232 | if (c <= 0) { |
universe@42 | 233 | free(key); |
universe@42 | 234 | return 1; |
universe@42 | 235 | } |
universe@42 | 236 | key[r] = 0; |
universe@43 | 237 | while (key[--r] == ' ') key[r] = 0; |
universe@43 | 238 | |
universe@43 | 239 | /* skip whitespaces */ |
universe@43 | 240 | while ((c = fgetc(f)) > 0) { |
universe@43 | 241 | if (c > 32) break; |
universe@43 | 242 | } |
universe@43 | 243 | if (c <= 0) { |
universe@43 | 244 | free(key); |
universe@43 | 245 | return 1; |
universe@43 | 246 | } |
universe@42 | 247 | |
universe@42 | 248 | /* read into value buffer */ |
universe@42 | 249 | n = 64; |
universe@42 | 250 | value = malloc(n); |
universe@42 | 251 | r = 0; |
universe@43 | 252 | do { |
universe@42 | 253 | if (c == '\n') break; |
universe@43 | 254 | if (r > n - 2) { |
universe@42 | 255 | n *= 2; |
universe@42 | 256 | value = realloc(value, n); |
universe@42 | 257 | } |
universe@42 | 258 | value[r] = c; |
universe@42 | 259 | r++; |
universe@43 | 260 | } while ((c = fgetc(f)) > 0); |
universe@42 | 261 | value[r] = 0; |
universe@43 | 262 | while (value[--r] < 33) value[r] = 0; |
universe@43 | 263 | value = realloc(value, r+2); |
universe@42 | 264 | |
universe@42 | 265 | ucx_map_cstr_put(map, key, value); |
universe@42 | 266 | free(key); |
universe@42 | 267 | } |
universe@42 | 268 | |
universe@42 | 269 | return 0; |
universe@42 | 270 | } |
universe@42 | 271 | |
universe@42 | 272 | int ucx_map_store(UcxMap *map, FILE *f) { |
universe@42 | 273 | UcxMapIterator iter = ucx_map_iterator(map); |
universe@42 | 274 | char *k, *v; |
universe@42 | 275 | sstr_t key, value; |
universe@42 | 276 | int written; |
universe@42 | 277 | |
universe@42 | 278 | UCX_MAP_FOREACH(v, iter) { |
universe@42 | 279 | k = (char*) iter.cur->key.data; |
universe@42 | 280 | key = sstr(k); value = sstr(v); |
universe@42 | 281 | |
universe@42 | 282 | written = 0; |
universe@42 | 283 | written += fwrite(key.ptr, 1, key.length, f); |
universe@42 | 284 | written += fwrite(" = ", 1, 3, f); |
universe@42 | 285 | written += fwrite(value.ptr, 1, value.length, f); |
universe@42 | 286 | written += fwrite("\n", 1, 1, f); |
universe@42 | 287 | |
universe@42 | 288 | if (written != key.length + value.length + 4) return 1; |
universe@42 | 289 | } |
universe@42 | 290 | |
universe@42 | 291 | return 0; |
universe@42 | 292 | } |