139 lines
5.3 KiB
C
139 lines
5.3 KiB
C
/*
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* Copyright (c) 2009-2012, Salvatore Sanfilippo <antirez at gmail dot com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Redis nor the names of its contributors may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __REDIS_UTIL_H
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#define __REDIS_UTIL_H
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#include <stdint.h>
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#include <time.h>
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#include <unistd.h>
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/* The maximum number of characters needed to represent a long double
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* as a string (long double has a huge range).
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* This should be the size of the buffer given to ld2string */
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#define MAX_LONG_DOUBLE_CHARS 5*1024
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/* long double to string convertion options */
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typedef enum {
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LD_STR_AUTO, /* %.17Lg */
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LD_STR_HUMAN, /* %.17Lf + Trimming of trailing zeros */
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LD_STR_HEX /* %La */
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} ld2string_mode;
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int stringmatchlen(const char *p, int plen, const char *s, int slen, int nocase);
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int stringmatch(const char *p, const char *s, int nocase);
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int stringmatchlen_fuzz_test(void);
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long long memtoll(const char *p, int *err);
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const char *mempbrk(const char *s, size_t len, const char *chars, size_t charslen);
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char *memmapchars(char *s, size_t len, const char *from, const char *to, size_t setlen);
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uint32_t digits10(uint64_t v);
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uint32_t sdigits10(int64_t v);
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int ll2string(char *s, size_t len, long long value);
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int string2ll(const char *s, size_t slen, long long *value);
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int string2ull(const char *s, unsigned long long *value);
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int string2l(const char *s, size_t slen, long *value);
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int string2ld(const char *s, size_t slen, long double *dp);
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int string2d(const char *s, size_t slen, double *dp);
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int d2string(char *buf, size_t len, double value);
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int ld2string(char *buf, size_t len, long double value, ld2string_mode mode);
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long getTimeZone(void);
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int pathIsBaseName(char *path);
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#define LOG_MAX_LEN 1024 /* Default maximum length of syslog messages.*/
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/* Log levels */
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#define LL_DEBUG 0
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#define LL_VERBOSE 1
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#define LL_NOTICE 2
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#define LL_WARNING 3
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#define LL_RAW (1<<10) /* Modifier to log without timestamp */
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#define LRU_BITS 24
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#define LRU_CLOCK_MAX ((1<<LRU_BITS)-1) /* Max value of obj->lru */
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#define LRU_CLOCK_RESOLUTION 1000 /* LRU clock resolution in ms */
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void serverLog(int level, const char *fmt, ...);
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void _serverPanic(const char *file, int line, const char *msg, ...);
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void _serverAssert(const char *estr, const char *file, int line);
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void serverLogHexDump(int level, char *descr, void *value, size_t len);
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#define serverPanic(...) _serverPanic(__FILE__,__LINE__,__VA_ARGS__),_exit(1)
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#define serverAssert(_e) ((_e)?(void)0 : (_serverAssert(#_e,__FILE__,__LINE__),_exit(1)))
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extern int verbosity;
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typedef long long mstime_t; /* millisecond time type. */
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unsigned int LRU_CLOCK(void);
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void debugDelay(int usec);
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long long ustime(void);
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/* Return the current time in minutes, just taking the least significant
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* 16 bits. The returned time is suitable to be stored as LDT (last decrement
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* time) for the LFU implementation. */
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static inline unsigned long LFUGetTimeInMinutesT(size_t sec) {
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return (sec / 60) & 65535;
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}
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static inline unsigned long LFUGetTimeInMinutes() {
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return LFUGetTimeInMinutesT(time(NULL));
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}
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/* Given an object last access time, compute the minimum number of minutes
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* that elapsed since the last access. Handle overflow (ldt greater than
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* the current 16 bits minutes time) considering the time as wrapping
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* exactly once. */
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static inline unsigned long LFUTimeElapsed(time_t sec, unsigned long ldt) {
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unsigned long now = LFUGetTimeInMinutesT(sec);
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if (now >= ldt) return now-ldt;
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return 65535-ldt+now;
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}
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/* Return the UNIX time in milliseconds */
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static inline mstime_t mstime(void) {
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return ustime()/1000;
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}
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/* Return the LRU clock, based on the clock resolution. This is a time
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* in a reduced-bits format that can be used to set and check the
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* object->lru field of redisObject structures. */
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static inline unsigned int getLRUClock(void) {
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int64_t t = time(NULL);
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return t & LRU_CLOCK_MAX;
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}
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#ifdef REDIS_TEST
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int utilTest(int argc, char **argv, int accurate);
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#endif
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#endif
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