TCPL学习毕节：第六章hash表

 1 struct nlist *install(char *name, char *defn)  
 2 {  
 3     struct nlist *np;  
 4     unsigned hashval;  
 5     if ((np = lookup(name)) == NULL)   
 6     {  
 7         np = (struct nlist *) malloc(sizeof(*np));  
 8         if (np == NULL || (np->name = strdup(name)) == NULL)  
 9             return NULL;  
10         hashval = hash(name);  
11         np->next = hashtab[hashval];  
12         hashtab[hashval] = np;  
13     } else   
14         free((void *) np->defn);   
15     if ((np->defn = strdup(defn)) == NULL)  
16         return NULL;  
17     return np;  
18 }  

1 np->next = hashtab[hashval];
2 hashtab[hashval] = np;