eina/hash - Add example that demonstrate many ways of deleting items.
SVN revision: 61093
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@ -23,6 +23,7 @@ SRCS = \
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eina_hash_05.c \
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eina_hash_06.c \
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eina_hash_07.c \
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eina_hash_08.c \
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eina_iterator_01.c \
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eina_list_01.c \
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eina_list_02.c \
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@ -58,6 +59,7 @@ pkglib_PROGRAMS += \
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eina_hash_05 \
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eina_hash_06 \
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eina_hash_07 \
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eina_hash_08 \
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eina_iterator_01 \
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eina_list_01 \
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eina_list_02 \
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@ -0,0 +1,125 @@
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#include <stdio.h>
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#include <string.h>
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#include <Eina.h>
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/*
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* Eina Hash - phonebook
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*
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* This example demonstrate the use of Eina Hash by implementing a phonebook
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* that stores its contact data into the hash.
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*
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* It indexes the phone numbers by Contact Full Name, so it's a hash with
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* string keys.
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*/
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struct _Phone_Entry {
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const char *name; // Full name.
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const char *number; // Phone number.
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};
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typedef struct _Phone_Entry Phone_Entry;
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static Phone_Entry _start_entries[] = {
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{ "Wolfgang Amadeus Mozart", "+01 23 456-78910" },
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{ "Ludwig van Beethoven", "+12 34 567-89101" },
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{ "Richard Georg Strauss", "+23 45 678-91012" },
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{ "Heitor Villa-Lobos", "+34 56 789-10123" },
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{ NULL, NULL }
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}; // _start_entries
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static void
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_phone_entry_free_cb(void *data)
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{
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free(data);
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}
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static Eina_Bool
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_phone_book_foreach_cb(const Eina_Hash *phone_book, const void *key,
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void *data, void *fdata)
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{
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const char *name = key;
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const char *number = data;
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printf("%s: %s\n", name, number);
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// Return EINA_FALSE to stop this callback from being called
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return EINA_TRUE;
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}
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int
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main(int argc, const char *argv[])
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{
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Eina_Hash *phone_book = NULL;
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int i;
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const char *entry_name = "Heitor Villa-Lobos";
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int entry_size;
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const char *saved_entry_name = "Alceu Valenca";
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int saved_entry_size = sizeof("Alceu Valenca");
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const char *phone = NULL;
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Eina_Bool r;
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Eina_Iterator *it;
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void *data;
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eina_init();
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phone_book = eina_hash_string_superfast_new(_phone_entry_free_cb);
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// Add initial entries to our hash
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for (i = 0; _start_entries[i].name != NULL; i++)
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{
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eina_hash_add(phone_book, _start_entries[i].name,
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strdup(_start_entries[i].number));
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}
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// Delete entries
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r = eina_hash_del(phone_book, entry_name, NULL);
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printf("Hash entry successfully deleted? %d\n\n", r);
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int hash = eina_hash_superfast("Ludwig van Beethoven",
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sizeof("Ludwig van Beethoven"));
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r = eina_hash_del_by_key_hash(phone_book, "Ludwig van Beethoven",
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sizeof("Ludwig van Beethoven"), hash);
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printf("Hash entry successfully deleted? %d\n\n", r);
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r = eina_hash_del_by_key(phone_book, "Richard Georg Strauss");
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printf("Hash entry successfully deleted? %d\n\n", r);
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// add entry by hash
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entry_name = "Raul_Seixas";
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entry_size = sizeof("Raul Seixas");
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phone = strdup("+33 33 333-33333");
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hash = eina_hash_superfast(entry_name, entry_size);
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eina_hash_add_by_hash(phone_book, entry_name, entry_size, hash, phone);
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// don't need to free 'phone' after the next del:
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r = eina_hash_del_by_data(phone_book, phone);
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printf("Hash entry successfully deleted? %d\n\n", r);
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// add entry by hash directly - no copy of the key will be done
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hash = eina_hash_superfast(saved_entry_name, saved_entry_size);
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phone = strdup("+44 44 444-44444");
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eina_hash_direct_add_by_hash(phone_book, saved_entry_name,
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saved_entry_size, hash, phone);
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// find the added entry by its hash:
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phone = eina_hash_find_by_hash(phone_book, saved_entry_name,
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saved_entry_size, hash);
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if (phone)
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{
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char *newphone = strdup("+55 55 555-55555");
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phone = eina_hash_modify_by_hash(phone_book, saved_entry_name,
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saved_entry_size, hash, newphone);
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if (phone)
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printf("changing phone to %s, old one was %s\n", newphone, phone);
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else
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printf("couldn't modify entry identified by %d\n", hash);
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}
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else
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{
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printf("couldn't find entry identified by %d\n", hash);
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}
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eina_hash_free(phone_book);
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eina_shutdown();
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}
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