1 #ifndef HASHMAP_H 2 # define HASHMAP_H 3 4 # include <stdlib.h> 5 # include <stdint.h> 6 7 #ifndef __GNUC_PREREQ 8 #if defined(__GNUC__) && defined(__GNUC_MINOR__) 9 #define __GNUC_PREREQ(maj, min) \ 10 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) 11 #else 12 #define __GNUC_PREREQ(maj, min) 0 13 #endif 14 #endif 15 16 struct ext2fs_hashmap { 17 uint32_t size; 18 uint32_t(*hash)(const void *key, size_t len); 19 void(*free)(void*); 20 struct ext2fs_hashmap_entry *first; 21 struct ext2fs_hashmap_entry *last; 22 struct ext2fs_hashmap_entry { 23 void *data; 24 const void *key; 25 size_t key_len; 26 struct ext2fs_hashmap_entry *next; 27 struct ext2fs_hashmap_entry *list_next; 28 struct ext2fs_hashmap_entry *list_prev; 29 #if __GNUC_PREREQ (4, 8) 30 #pragma GCC diagnostic push 31 #pragma GCC diagnostic ignored "-Wpedantic" 32 #endif 33 } *entries[0]; 34 #if __GNUC_PREREQ (4, 8) 35 #pragma GCC diagnostic pop 36 #endif 37 }; 38 39 struct ext2fs_hashmap *ext2fs_hashmap_create( 40 uint32_t(*hash_fct)(const void*, size_t), 41 void(*free_fct)(void*), size_t size); 42 void ext2fs_hashmap_add(struct ext2fs_hashmap *h, void *data, const void *key, 43 size_t key_len); 44 void *ext2fs_hashmap_lookup(struct ext2fs_hashmap *h, const void *key, 45 size_t key_len); 46 void *ext2fs_hashmap_iter_in_order(struct ext2fs_hashmap *h, 47 struct ext2fs_hashmap_entry **it); 48 void ext2fs_hashmap_del(struct ext2fs_hashmap *h, 49 struct ext2fs_hashmap_entry *e); 50 void ext2fs_hashmap_free(struct ext2fs_hashmap *h); 51 52 uint32_t ext2fs_djb2_hash(const void *str, size_t size); 53 54 #endif /* !HASHMAP_H */ 55
