61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
#include "uthash.h"
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#include <stdio.h>
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#include <stdlib.h> /* malloc */
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typedef struct person_t {
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char first_name[10];
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int id;
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UT_hash_handle hh;
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} person_t;
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int main()
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{
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person_t *people=NULL, *person, *new_person, *tmp;
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const char **name;
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const char * names[] = { "bob", "jack", "gary", "ty", "bo", "phil", "art",
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"gil", "buck", "ted", NULL
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};
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int id=0;
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for(name=names; *name!=NULL; name++) {
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person = (person_t*)malloc(sizeof(person_t));
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if (person == NULL) {
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exit(-1);
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}
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strcpy(person->first_name, *name);
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person->id = id++;
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HASH_ADD_STR(people,first_name,person);
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printf("added %s (id %d)\n", person->first_name, person->id);
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}
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person=NULL;
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person_t **p=&person;
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for(name=names; *name!=NULL; name++) {
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HASH_FIND_STR(people,*name,*p);
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if (person != NULL) {
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printf("found %s (id %d)\n", person->first_name, person->id);
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new_person = (person_t *)malloc(sizeof(person_t));
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if (new_person == NULL) {
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exit(-1);
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}
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memcpy(new_person, person, sizeof(person_t));
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new_person->id = person->id*10;
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HASH_REPLACE_STR(people,first_name,new_person,tmp);
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printf("replaced (%c) with %s (id %d)\n", (tmp!=NULL)?'y':'n', new_person->first_name, new_person->id);
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if (tmp != NULL) {
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free(tmp);
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}
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} else {
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printf("failed to find %s\n", *name);
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}
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}
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printf("traversing... \n");
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HASH_ITER(hh, people, person, tmp) {
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printf("%s (id %d)\n", person->first_name, person->id);
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HASH_DEL(people,person);
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free(person);
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}
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return 0;
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}
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