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Remove unused code

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Emmanuel Marty 2019-10-11 09:11:41 +02:00 committed by GitHub
parent c77c666568
commit 5141ed7c59
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1 changed files with 0 additions and 138 deletions
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src/hashmap.c
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/*
* hashmap.c - integer hashmap implementation
*
* Copyright (C) 2019 Emmanuel Marty
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
/*
* Uses the libdivsufsort library Copyright (c) 2003-2008 Yuta Mori
*
* Inspired by LZ4 by Yann Collet. https://github.com/lz4/lz4
* With help, ideas, optimizations and speed measurements by spke <zxintrospec@gmail.com>
* With ideas from Lizard by Przemyslaw Skibinski and Yann Collet. https://github.com/inikep/lizard
* Also with ideas from smallz4 by Stephan Brumme. https://create.stephan-brumme.com/smallz4/
*
*/
#include <stdlib.h>
#include <string.h>
#include "hashmap.h"
/**
* Generate key hash by mixing
*
* @param key key to get hash for
*
* @return hash
*/
static unsigned int lzsa_hashmap_get_hash(unsigned long long key) {
key = (~key) + (key << 21);
key = key ^ (key >> 24);
key = (key + (key << 3)) + (key << 8);
key = key ^ (key >> 14);
key = (key + (key << 2)) + (key << 4);
key = key ^ (key >> 28);
key = key + (key << 31);
return key & (LZSA_HASH_NBUCKETS - 1);
}
/**
* Initialize hashmap
*
* @param pHashMap hashmap
*/
void lzsa_hashmap_init(lzsa_hashmap_t *pHashMap) {
pHashMap->pBuffer = NULL;
memset(pHashMap->pBucket, 0, sizeof(lzsa_hashvalue_t *) * LZSA_HASH_NBUCKETS);
}
/**
* Set value for key
*
* @param pHashMap hashmap
* @param key key to set value for
* @param value new value
*/
void lzsa_hashmap_insert(lzsa_hashmap_t *pHashMap, unsigned long long key, unsigned int value) {
unsigned int hash = lzsa_hashmap_get_hash(key);
lzsa_hashvalue_t **pBucket = &pHashMap->pBucket[hash];
while (*pBucket) {
if ((*pBucket)->key == key) {
(*pBucket)->value = value;
return;
}
pBucket = &((*pBucket)->pNext);
}
if (!pHashMap->pBuffer || pHashMap->pBuffer->nFreeEntryIdx >= 255) {
lzsa_hashbuffer_t *pNewBuffer = (lzsa_hashbuffer_t *)malloc(sizeof(lzsa_hashbuffer_t));
if (!pNewBuffer) return;
pNewBuffer->pNext = pHashMap->pBuffer;
pNewBuffer->nFreeEntryIdx = 0;
pHashMap->pBuffer = pNewBuffer;
}
*pBucket = &pHashMap->pBuffer->value[pHashMap->pBuffer->nFreeEntryIdx++];
(*pBucket)->pNext = NULL;
(*pBucket)->key = key;
(*pBucket)->value = value;
}
/**
* Get value for key
*
* @param pHashMap hashmap
* @param key key to get value for
* @param pValue pointer to where to store value if found
*
* @return 0 if found, nonzero if not found
*/
int lzsa_hashmap_find(lzsa_hashmap_t *pHashMap, unsigned long long key, unsigned int *pValue) {
unsigned int hash = lzsa_hashmap_get_hash(key);
lzsa_hashvalue_t **pBucket = &pHashMap->pBucket[hash];
while (*pBucket) {
if ((*pBucket)->key == key) {
*pValue = (*pBucket)->value;
return 0;
}
pBucket = &((*pBucket)->pNext);
}
return -1;
}
/**
* Clear hashmap
*
* @param pHashMap hashmap
*/
void lzsa_hashmap_clear(lzsa_hashmap_t *pHashMap) {
while (pHashMap->pBuffer) {
lzsa_hashbuffer_t *pCurBuffer = pHashMap->pBuffer;
pHashMap->pBuffer = pCurBuffer->pNext;
free(pCurBuffer);
pCurBuffer = NULL;
}
memset(pHashMap->pBucket, 0, sizeof(lzsa_hashvalue_t *) * LZSA_HASH_NBUCKETS);
}