How to copy dictionary in C - c

Question

I have read this article: Quick Way to Implement Dictionary in C and implemented it. Need to say that I change the install and lookup to use hashtab as a argument instead of a global variable, It worked like charm:
struct nlist *install(struct nlist **hashtab,char *name, symbol *dfn);
struct nlist *lookup(struct nlist **hashtab, char *s);
The problem is, I need to copy the hash into a new one. I first try:
struct nlist **copy_context(struct nlist **hashtab){
nlist **copy = (nlist**)malloc(sizeof(nlist*)*HASHSIZE);
struct nlist *np;
int i = 0;
for (np = hashtab[i]; i<HASHSIZE ;i++ ){
debug_log("i vale %i",i);
if( np != NULL ){
install(copy,np->name,np->dfn);
}
}
return copy;
}
but is not clear to me where the values are stored neither where to start the copy. I was thinking something like:
struct nlist **copy_context(struct nlist **hashtab){
nlist **copy = (nlist**)malloc(sizeof(nlist*)*HASHSIZE);
i = 0;//this is not correct
or (np = hashtab[i]; np != NULL; np = np->next){
install(copy,np->name,np->dfn);
}
return copy;
}
but is notingh is working.

Answer 1

as "Some Programmer dude" said I need to do two loops, one on the table itself and one for the list in that table index.
struct nlist **copy_context(struct nlist **hashtab){
nlist **copy = (nlist**)malloc(sizeof(nlist*)*HASHSIZE);
struct nlist *np;
for (int i = 0; i<HASHSIZE; i++ ){
np = hashtab[i];
while( np )
{
install(copy,np->name,np->dfn);
np = np->next;
}
}
return copy;
}