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+/*
+ * Copyright (c) 2009-2012, 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 __REDIS_UTIL_H
+#define __REDIS_UTIL_H
+
+#include <stdint.h>
+#include "sds.h"
+
+/* The maximum number of characters needed to represent a long double
+ * as a string (long double has a huge range of some 4952 chars, see LDBL_MAX).
+ * This should be the size of the buffer given to ld2string */
+#define MAX_LONG_DOUBLE_CHARS 5*1024
+
+/* The maximum number of characters needed to represent a double
+ * as a string (double has a huge range of some 328 chars, see DBL_MAX).
+ * This should be the size of the buffer for sprintf with %f */
+#define MAX_DOUBLE_CHARS 400
+
+/* The maximum number of characters needed to for d2string call.
+ * Since it uses %g and not %f, some 40 chars should be enough. */
+#define MAX_D2STRING_CHARS 128
+
+/* Bytes needed for long -> str + '\0' */
+#define LONG_STR_SIZE      21
+
+/* long double to string conversion options */
+typedef enum {
+    LD_STR_AUTO,     /* %.17Lg */
+    LD_STR_HUMAN,    /* %.17Lf + Trimming of trailing zeros */
+    LD_STR_HEX       /* %La */
+} ld2string_mode;
+
+int stringmatchlen(const char *p, int plen, const char *s, int slen, int nocase);
+int stringmatch(const char *p, const char *s, int nocase);
+int stringmatchlen_fuzz_test(void);
+unsigned long long memtoull(const char *p, int *err);
+const char *mempbrk(const char *s, size_t len, const char *chars, size_t charslen);
+char *memmapchars(char *s, size_t len, const char *from, const char *to, size_t setlen);
+uint32_t digits10(uint64_t v);
+uint32_t sdigits10(int64_t v);
+int ll2string(char *s, size_t len, long long value);
+int ull2string(char *s, size_t len, unsigned long long value);
+int string2ll(const char *s, size_t slen, long long *value);
+int string2ull(const char *s, unsigned long long *value);
+int string2l(const char *s, size_t slen, long *value);
+int string2ld(const char *s, size_t slen, long double *dp);
+int string2d(const char *s, size_t slen, double *dp);
+int trimDoubleString(char *buf, size_t len);
+int d2string(char *buf, size_t len, double value);
+int fixedpoint_d2string(char *dst, size_t dstlen, double dvalue, int fractional_digits);
+int ld2string(char *buf, size_t len, long double value, ld2string_mode mode);
+int double2ll(double d, long long *out);
+int yesnotoi(char *s);
+sds getAbsolutePath(char *filename);
+long getTimeZone(void);
+int pathIsBaseName(char *path);
+int dirCreateIfMissing(char *dname);
+int dirExists(char *dname);
+int dirRemove(char *dname);
+int fileExist(char *filename);
+sds makePath(char *path, char *filename);
+int fsyncFileDir(const char *filename);
+
+#ifdef REDIS_TEST
+int utilTest(int argc, char **argv, int flags);
+#endif
+
+#endif