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diff --git a/src/listpack.h b/src/listpack.h
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+/* Listpack -- A lists of strings serialization format
+ *
+ * This file implements the specification you can find at:
+ *
+ *  https://github.com/antirez/listpack
+ *
+ * Copyright (c) 2017, Salvatore Sanfilippo <antirez at gmail dot com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   * Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *   * 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.
+ *   * Neither the name of Redis nor the names of its contributors may be used
+ *     to endorse or promote products derived from this software without
+ *     specific prior written permission.
+ *
+ * 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.
+ */
+
+#ifndef __LISTPACK_H
+#define __LISTPACK_H
+
+#include <stdlib.h>
+#include <stdint.h>
+
+#define LP_INTBUF_SIZE 21 /* 20 digits of -2^63 + 1 null term = 21. */
+
+/* lpInsert() where argument possible values: */
+#define LP_BEFORE 0
+#define LP_AFTER 1
+#define LP_REPLACE 2
+
+/* Each entry in the listpack is either a string or an integer. */
+typedef struct {
+    /* When string is used, it is provided with the length (slen). */
+    unsigned char *sval;
+    uint32_t slen;
+    /* When integer is used, 'sval' is NULL, and lval holds the value. */
+    long long lval;
+} listpackEntry;
+
+unsigned char *lpNew(size_t capacity);
+void lpFree(unsigned char *lp);
+unsigned char* lpShrinkToFit(unsigned char *lp);
+unsigned char *lpInsertString(unsigned char *lp, unsigned char *s, uint32_t slen,
+                              unsigned char *p, int where, unsigned char **newp);
+unsigned char *lpInsertInteger(unsigned char *lp, long long lval,
+                               unsigned char *p, int where, unsigned char **newp);
+unsigned char *lpPrepend(unsigned char *lp, unsigned char *s, uint32_t slen);
+unsigned char *lpPrependInteger(unsigned char *lp, long long lval);
+unsigned char *lpAppend(unsigned char *lp, unsigned char *s, uint32_t slen);
+unsigned char *lpAppendInteger(unsigned char *lp, long long lval);
+unsigned char *lpReplace(unsigned char *lp, unsigned char **p, unsigned char *s, uint32_t slen);
+unsigned char *lpReplaceInteger(unsigned char *lp, unsigned char **p, long long lval);
+unsigned char *lpDelete(unsigned char *lp, unsigned char *p, unsigned char **newp);
+unsigned char *lpDeleteRangeWithEntry(unsigned char *lp, unsigned char **p, unsigned long num);
+unsigned char *lpDeleteRange(unsigned char *lp, long index, unsigned long num);
+unsigned char *lpBatchDelete(unsigned char *lp, unsigned char **ps, unsigned long count);
+unsigned char *lpMerge(unsigned char **first, unsigned char **second);
+unsigned char *lpDup(unsigned char *lp);
+unsigned long lpLength(unsigned char *lp);
+unsigned char *lpGet(unsigned char *p, int64_t *count, unsigned char *intbuf);
+unsigned char *lpGetValue(unsigned char *p, unsigned int *slen, long long *lval);
+unsigned char *lpFind(unsigned char *lp, unsigned char *p, unsigned char *s, uint32_t slen, unsigned int skip);
+unsigned char *lpFirst(unsigned char *lp);
+unsigned char *lpLast(unsigned char *lp);
+unsigned char *lpNext(unsigned char *lp, unsigned char *p);
+unsigned char *lpPrev(unsigned char *lp, unsigned char *p);
+size_t lpBytes(unsigned char *lp);
+size_t lpEstimateBytesRepeatedInteger(long long lval, unsigned long rep);
+unsigned char *lpSeek(unsigned char *lp, long index);
+typedef int (*listpackValidateEntryCB)(unsigned char *p, unsigned int head_count, void *userdata);
+int lpValidateIntegrity(unsigned char *lp, size_t size, int deep,
+                        listpackValidateEntryCB entry_cb, void *cb_userdata);
+unsigned char *lpValidateFirst(unsigned char *lp);
+int lpValidateNext(unsigned char *lp, unsigned char **pp, size_t lpbytes);
+unsigned int lpCompare(unsigned char *p, unsigned char *s, uint32_t slen);
+void lpRandomPair(unsigned char *lp, unsigned long total_count, listpackEntry *key, listpackEntry *val);
+void lpRandomPairs(unsigned char *lp, unsigned int count, listpackEntry *keys, listpackEntry *vals);
+unsigned int lpRandomPairsUnique(unsigned char *lp, unsigned int count, listpackEntry *keys, listpackEntry *vals);
+void lpRandomEntries(unsigned char *lp, unsigned int count, listpackEntry *entries);
+unsigned char *lpNextRandom(unsigned char *lp, unsigned char *p, unsigned int *index,
+                            unsigned int remaining, int even_only);
+int lpSafeToAdd(unsigned char* lp, size_t add);
+void lpRepr(unsigned char *lp);
+
+#ifdef REDIS_TEST
+int listpackTest(int argc, char *argv[], int flags);
+#endif
+
+#endif