diff --git a/src/hashmap.c b/src/hashmap.c
deleted file mode 100644
index 71bf01b..0000000
--- a/src/hashmap.c
+++ /dev/null
@@ -1,138 +0,0 @@
-/*
- * 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);
-}
-