chromium/third_party/boringssl/src/crypto/lhash/lhash.c

/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * 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 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.] */

#include <openssl/lhash.h>

#include <assert.h>
#include <limits.h>
#include <string.h>

#include <openssl/mem.h>

#include "internal.h"
#include "../internal.h"


// kMinNumBuckets is the minimum size of the buckets array in an |_LHASH|.
static const size_t kMinNumBuckets =;

// kMaxAverageChainLength contains the maximum, average chain length. When the
// average chain length exceeds this value, the hash table will be resized.
static const size_t kMaxAverageChainLength =;
static const size_t kMinAverageChainLength =;

// lhash_item_st is an element of a hash chain. It points to the opaque data
// for this element and to the next item in the chain. The linked-list is NULL
// terminated.
LHASH_ITEM;

struct lhash_st {};

_LHASH *OPENSSL_lh_new(lhash_hash_func hash, lhash_cmp_func comp) {}

void OPENSSL_lh_free(_LHASH *lh) {}

size_t OPENSSL_lh_num_items(const _LHASH *lh) {}

// get_next_ptr_and_hash returns a pointer to the pointer that points to the
// item equal to |data|. In other words, it searches for an item equal to |data|
// and, if it's at the start of a chain, then it returns a pointer to an
// element of |lh->buckets|, otherwise it returns a pointer to the |next|
// element of the previous item in the chain. If an element equal to |data| is
// not found, it returns a pointer that points to a NULL pointer. If |out_hash|
// is not NULL, then it also puts the hash value of |data| in |*out_hash|.
static LHASH_ITEM **get_next_ptr_and_hash(const _LHASH *lh, uint32_t *out_hash,
                                          const void *data,
                                          lhash_hash_func_helper call_hash_func,
                                          lhash_cmp_func_helper call_cmp_func) {}

// get_next_ptr_by_key behaves like |get_next_ptr_and_hash| but takes a key
// which may be a different type from the values stored in |lh|.
static LHASH_ITEM **get_next_ptr_by_key(const _LHASH *lh, const void *key,
                                        uint32_t key_hash,
                                        int (*cmp_key)(const void *key,
                                                       const void *value)) {}

void *OPENSSL_lh_retrieve(const _LHASH *lh, const void *data,
                          lhash_hash_func_helper call_hash_func,
                          lhash_cmp_func_helper call_cmp_func) {}

void *OPENSSL_lh_retrieve_key(const _LHASH *lh, const void *key,
                              uint32_t key_hash,
                              int (*cmp_key)(const void *key,
                                             const void *value)) {}

// lh_rebucket allocates a new array of |new_num_buckets| pointers and
// redistributes the existing items into it before making it |lh->buckets| and
// freeing the old array.
static void lh_rebucket(_LHASH *lh, const size_t new_num_buckets) {}

// lh_maybe_resize resizes the |buckets| array if needed.
static void lh_maybe_resize(_LHASH *lh) {}

int OPENSSL_lh_insert(_LHASH *lh, void **old_data, void *data,
                      lhash_hash_func_helper call_hash_func,
                      lhash_cmp_func_helper call_cmp_func) {}

void *OPENSSL_lh_delete(_LHASH *lh, const void *data,
                        lhash_hash_func_helper call_hash_func,
                        lhash_cmp_func_helper call_cmp_func) {}

void OPENSSL_lh_doall_arg(_LHASH *lh, void (*func)(void *, void *), void *arg) {}