#ifndef _HASH_H
#define _HASH_H

struct nlist { /* table entry */
     struct nlist *next;
     char *name;
     char *defn;
};

unsigned hash(char *s);
struct nlist *lookup(char *s);
char *strdup(char *s);
struct nlist *install(char *name, char *defn);
int undef(char *name);

#endif /* _HASH_H */