60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
#include "uthash.h"
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#include <stdlib.h> /* malloc */
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#include <stdio.h> /* printf */
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typedef struct example_user_t {
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int id;
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int cookie;
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UT_hash_handle hh;
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} example_user_t;
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int main()
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{
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int i;
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unsigned c;
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example_user_t *user, *tmp, *users=NULL;
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/* create elements */
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for(i=0; i<10; i++) {
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if ( (user = (example_user_t*)malloc(sizeof(example_user_t))) == NULL) {
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exit(-1);
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}
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user->id = i;
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user->cookie = i*i;
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HASH_ADD_INT(users,id,user);
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}
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/* show the hash */
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for(user=users; user != NULL; user=(example_user_t*)(user->hh.next)) {
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printf("user %d, cookie %d\n", user->id, user->cookie);
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}
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c = HASH_COUNT(users);
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printf("%u users. Deleting odd id's...\n", c);
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/* delete the odd id's */
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HASH_ITER(hh, users, user, tmp) {
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if ((user->id & 1) != 0) {
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HASH_DEL(users,user);
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}
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}
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/* show the hash */
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for(user=users; user != NULL; user=(example_user_t*)(user->hh.next)) {
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printf("user %d, cookie %d\n", user->id, user->cookie);
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}
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c = HASH_COUNT(users);
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printf("%u users. Deleting remaining id's...\n", c);
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/* delete all that are left */
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HASH_ITER(hh, users, user, tmp) {
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HASH_DEL(users,user);
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}
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c = HASH_COUNT(users);
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printf("%u users.\n", c);
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/* show the hash */
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for(user=users; user != NULL; user=(example_user_t*)(user->hh.next)) {
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printf("user %d, cookie %d\n", user->id, user->cookie);
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}
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return 0;
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}
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