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#ifndef UNS_STRING_H
#define UNS_STRING_H
/* Copyright (c) 2024, Peter McGoron
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1) Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2) Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "uns.h"
/* Imperative hash tables with internal chaining.
*
* Internal chaining is inefficient, but it is a good showcase of garbage
* collection.
*
* Hashtable:
* [size][used][pointers to entries]
* NULL or |/---------------------------------------------\
* [pointer to length][pointer to string][pointer to next] /
* | NULL or /
* \-----------/
*/
void uns_hashtable_search(struct uns_gc *gc, struct uns_ctr *htbl,
unsigned char *str, size_t string_len,
struct uns_ctr *found);
size_t uns_hashtable_used(struct uns_gc *gc, struct uns_ctr *htbl);
size_t uns_hashtable_len(struct uns_gc *gc, struct uns_ctr *htbl);
void uns_hashtable_del(struct uns_gc *gc, struct uns_ctr *htbl,
unsigned char *str, size_t string_len,
struct uns_ctr *old_value);
/* The following functions may collect. */
void uns_hashtable_alloc_into(struct uns_gc *gc, struct uns_ctr *r, size_t size);
void uns_hashtable_add(struct uns_gc *gc, struct uns_ctr *htbl,
struct uns_ctr *string, size_t string_len,
struct uns_ctr *value, struct uns_ctr *old_value);
void uns_hashtable_resize(struct uns_gc *gc, struct uns_ctr *htbl, size_t newsize);
#endif
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