Thread: uthash library - string key not working

hi, is anyone using this library??


I have a problem :


This chunk of code does not work :

Code:

#include <string.h>  /* strcpy */
#include <stdlib.h>  /* malloc */
#include <stdio.h>   /* printf */
#include "uthash.h"

typedef struct hashTableChrInt {
    char key[500];                    /* key */
    int value;             
    UT_hash_handle hh;         /* makes this structure hashable */
}hashTableChrInt;


void add_read( hashTableChrInt * reads,  char *read) {
	hashTableChrInt *s = NULL;;
    int x =10;
 
	s = ( hashTableChrInt*)malloc(sizeof( hashTableChrInt));
    strcpy(s->key, read);
    s->value = x;
    HASH_ADD_STR( reads, key, s );
    

}

int main() {
     char read[] = "Robert";
     char name[]="betty";
     hashTableChrInt *s, *tmp, *reads = NULL;
     
add_read(reads,read);
add_read(reads,name);


    HASH_FIND_STR( reads, "betty", s);
    if (s) printf("betty's id is %d\n", s->value);

    /* free the hash table contents */
    HASH_ITER(hh, reads, s, tmp) {
      HASH_DEL(reads, s);
      free(s);
    }
    return 0;
}

But this one does :

Code:

#include <string.h>  /* strcpy */
#include <stdlib.h>  /* malloc */
#include <stdio.h>   /* printf */
#include "uthash.h"

typedef struct hashTableChrInt{
    char key[500];             /* key (string is WITHIN the structure) */
    int value;
    UT_hash_handle hh;         /* makes this structure hashable */
}hashTableChrInt;


int main() {
     char read[] = "Robert";
     char name[]="betty";
     hashTableChrInt *s, *tmp, *reads = NULL;
      int i=2;


        s = ( hashTableChrInt*)malloc(sizeof(hashTableChrInt));
        strcpy(s->key, read);
        s->value = i++;
        HASH_ADD_STR( reads, key, s );
        s = ( hashTableChrInt*)malloc(sizeof( hashTableChrInt));
        strcpy(s->key, name);
        s->value = i++;
        HASH_ADD_STR( reads, key, s );

    HASH_FIND_STR( reads, "betty", s);
    if (s) printf("betty's id is %d\n", s->value);

    /* free the hash table contents */
    HASH_ITER(hh, reads, s, tmp) {
      HASH_DEL(reads, s);
      free(s);
    }
    return 0;
}

where is my making mistake ?? The only thing i did is to outsource my adding into a function.

thnx