femtolisp/llt/htableh.inc

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//-*- mode:c -*-
#include "htable.h"
#define HTPROT(HTNAME) \
void *HTNAME##_get(htable_t *h, void *key); \
void HTNAME##_put(htable_t *h, void *key, void *val); \
void HTNAME##_adjoin(htable_t *h, void *key, void *val); \
int HTNAME##_has(htable_t *h, void *key); \
int HTNAME##_remove(htable_t *h, void *key); \
void **HTNAME##_bp(htable_t *h, void *key);
// return value, or HT_NOTFOUND if key not found
// add key/value binding
// add binding iff key is unbound
// does key exist?
// logically remove key
// get a pointer to the location of the value for the given key.
// creates the location if it doesn't exist. only returns NULL
// if memory allocation fails.
// this should be used for updates, for example:
// void **bp = ptrhash_bp(h, key);
// *bp = f(*bp);
// do not reuse bp if there might be intervening calls to ptrhash_put,
// ptrhash_bp, ptrhash_reset, or ptrhash_free.