Tizen Native API
5.5
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eina_hash_08.c
This example shows the the usage of eina_hash_add(), eina_hash_add_by_hash(), eina_hash_direct_add_by_hash(), eina_hash_del(), eina_hash_del_by_key_hash(), eina_hash_del_by_key(), eina_hash_del_by_data(), eina_hash_find_by_hash() and eina_hash_modify_by_hash().
//Compile with: //gcc -g eina_hash_08.c -o eina_hash_08 `pkg-config --cflags --libs eina` #include <stdio.h> #include <string.h> #include <Eina.h> /* * Eina Hash - phonebook * * This example demonstrate the use of Eina Hash by implementing a phonebook * that stores its contact data into the hash. * * It indexes the phone numbers by Contact Full Name, so it's a hash with * string keys. */ struct _Phone_Entry { const char *name; // Full name. const char *number; // Phone number. }; typedef struct _Phone_Entry Phone_Entry; static Phone_Entry _start_entries[] = { { "Wolfgang Amadeus Mozart", "+01 23 456-78910" }, { "Ludwig van Beethoven", "+12 34 567-89101" }, { "Richard Georg Strauss", "+23 45 678-91012" }, { "Heitor Villa-Lobos", "+34 56 789-10123" }, { NULL, NULL } }; // _start_entries static void _phone_entry_free_cb(void *data) { free(data); } int main(int argc EINA_UNUSED, const char *argv[] EINA_UNUSED) { Eina_Hash *phone_book = NULL; int i; const char *entry_name = "Heitor Villa-Lobos"; int entry_size; const char *saved_entry_name = "Alceu Valenca"; int saved_entry_size = sizeof("Alceu Valenca"); const char *phone = NULL; Eina_Bool r; eina_init(); phone_book = eina_hash_string_superfast_new(_phone_entry_free_cb); // Add initial entries to our hash for (i = 0; _start_entries[i].name != NULL; i++) { eina_hash_add(phone_book, _start_entries[i].name, strdup(_start_entries[i].number)); } // Delete entries r = eina_hash_del(phone_book, entry_name, NULL); printf("Hash entry successfully deleted? %d\n\n", r); int hash = eina_hash_superfast("Ludwig van Beethoven", sizeof("Ludwig van Beethoven")); r = eina_hash_del_by_key_hash(phone_book, "Ludwig van Beethoven", sizeof("Ludwig van Beethoven"), hash); printf("Hash entry successfully deleted? %d\n\n", r); r = eina_hash_del_by_key(phone_book, "Richard Georg Strauss"); printf("Hash entry successfully deleted? %d\n\n", r); // add entry by hash entry_name = "Raul_Seixas"; entry_size = sizeof("Raul Seixas"); phone = strdup("+33 33 333-33333"); hash = eina_hash_superfast(entry_name, entry_size); eina_hash_add_by_hash(phone_book, entry_name, entry_size, hash, phone); // don't need to free 'phone' after the next del: r = eina_hash_del_by_data(phone_book, phone); printf("Hash entry successfully deleted? %d\n\n", r); // add entry by hash directly - no copy of the key will be done hash = eina_hash_superfast(saved_entry_name, saved_entry_size); phone = strdup("+44 44 444-44444"); eina_hash_direct_add_by_hash(phone_book, saved_entry_name, saved_entry_size, hash, phone); // find the added entry by its hash: phone = eina_hash_find_by_hash(phone_book, saved_entry_name, saved_entry_size, hash); if (phone) { char *newphone = strdup("+55 55 555-55555"); phone = eina_hash_modify_by_hash(phone_book, saved_entry_name, saved_entry_size, hash, newphone); if (phone) printf("changing phone to %s, old one was %s\n", newphone, phone); else printf("couldn't modify entry identified by %d\n", hash); } else { printf("couldn't find entry identified by %d\n", hash); } eina_hash_free(phone_book); eina_shutdown(); }