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/* Copyright 2000-2005 The Apache Software Foundation or its licensors, as
* applicable.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef APR_TIME_H
#define APR_TIME_H
/**
* @file apr_time.h
* @brief APR Time Library
*/
#include "apr.h"
#include "apr_pools.h"
#include "apr_errno.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/**
* @defgroup apr_time Time Routines
* @ingroup APR
* @{
*/
/** month names */
APR_DECLARE_DATA extern const char apr_month_snames[12][4];
/** day names */
APR_DECLARE_DATA extern const char apr_day_snames[7][4];
/** number of microseconds since 00:00:00 january 1, 1970 UTC */
typedef apr_int64_t apr_time_t;
/** mechanism to properly type apr_time_t literals */
#define APR_TIME_C(val) APR_INT64_C(val)
/** mechanism to properly print apr_time_t values */
#define APR_TIME_T_FMT APR_INT64_T_FMT
/** intervals for I/O timeouts, in microseconds */
typedef apr_int64_t apr_interval_time_t;
/** short interval for I/O timeouts, in microseconds */
typedef apr_int32_t apr_short_interval_time_t;
/** number of microseconds per second */
#define APR_USEC_PER_SEC APR_TIME_C(1000000)
/** @return apr_time_t as a second */
#define apr_time_sec(time) ((time) / APR_USEC_PER_SEC)
/** @return apr_time_t as a usec */
#define apr_time_usec(time) ((time) % APR_USEC_PER_SEC)
/** @return apr_time_t as a msec */
#define apr_time_msec(time) (((time) / 1000) % 1000)
/** @return apr_time_t as a msec */
#define apr_time_as_msec(time) ((time) / 1000)
/** @return a second as an apr_time_t */
#define apr_time_from_sec(sec) ((apr_time_t)(sec) * APR_USEC_PER_SEC)
/** @return a second and usec combination as an apr_time_t */
#define apr_time_make(sec, usec) ((apr_time_t)(sec) * APR_USEC_PER_SEC \
+ (apr_time_t)(usec))
/**
* @return the current time
*/
APR_DECLARE(apr_time_t) apr_time_now(void);
/** @see apr_time_exp_t */
typedef struct apr_time_exp_t apr_time_exp_t;
/**
* a structure similar to ANSI struct tm with the following differences:
* - tm_usec isn't an ANSI field
* - tm_gmtoff isn't an ANSI field (it's a bsdism)
*/
struct apr_time_exp_t {
/** microseconds past tm_sec */
apr_int32_t tm_usec;
/** (0-61) seconds past tm_min */
apr_int32_t tm_sec;
/** (0-59) minutes past tm_hour */
apr_int32_t tm_min;
/** (0-23) hours past midnight */
apr_int32_t tm_hour;
/** (1-31) day of the month */
apr_int32_t tm_mday;
/** (0-11) month of the year */
apr_int32_t tm_mon;
/** year since 1900 */
apr_int32_t tm_year;
/** (0-6) days since sunday */
apr_int32_t tm_wday;
/** (0-365) days since jan 1 */
apr_int32_t tm_yday;
/** daylight saving time */
apr_int32_t tm_isdst;
/** seconds east of UTC */
apr_int32_t tm_gmtoff;
};
/**
* convert an ansi time_t to an apr_time_t
* @param result the resulting apr_time_t
* @param input the time_t to convert
*/
APR_DECLARE(apr_status_t) apr_time_ansi_put(apr_time_t *result,
time_t input);
/**
* convert a time to its human readable components using an offset
* from GMT
* @param result the exploded time
* @param input the time to explode
* @param offs the number of seconds offset to apply
*/
APR_DECLARE(apr_status_t) apr_time_exp_tz(apr_time_exp_t *result,
apr_time_t input,
apr_int32_t offs);
/**
* convert a time to its human readable components in GMT timezone
* @param result the exploded time
* @param input the time to explode
*/
APR_DECLARE(apr_status_t) apr_time_exp_gmt(apr_time_exp_t *result,
apr_time_t input);
/**
* convert a time to its human readable components in local timezone
* @param result the exploded time
* @param input the time to explode
*/
APR_DECLARE(apr_status_t) apr_time_exp_lt(apr_time_exp_t *result,
apr_time_t input);
/**
* Convert time value from human readable format to a numeric apr_time_t
* e.g. elapsed usec since epoch
* @param result the resulting imploded time
* @param input the input exploded time
*/
APR_DECLARE(apr_status_t) apr_time_exp_get(apr_time_t *result,
apr_time_exp_t *input);
/**
* Convert time value from human readable format to a numeric apr_time_t that
* always represents GMT
* @param result the resulting imploded time
* @param input the input exploded time
*/
APR_DECLARE(apr_status_t) apr_time_exp_gmt_get(apr_time_t *result,
apr_time_exp_t *input);
/**
* Sleep for the specified number of micro-seconds.
* @param t desired amount of time to sleep.
* @warning May sleep for longer than the specified time.
*/
APR_DECLARE(void) apr_sleep(apr_interval_time_t t);
/** length of a RFC822 Date */
#define APR_RFC822_DATE_LEN (30)
/**
* apr_rfc822_date formats dates in the RFC822
* format in an efficient manner. It is a fixed length
* format which requires the indicated amount of storage,
* including the trailing NUL terminator.
* @param date_str String to write to.
* @param t the time to convert
*/
APR_DECLARE(apr_status_t) apr_rfc822_date(char *date_str, apr_time_t t);
/** length of a CTIME date */
#define APR_CTIME_LEN (25)
/**
* apr_ctime formats dates in the ctime() format
* in an efficient manner. it is a fixed length format
* and requires the indicated amount of storage including
* the trailing NUL terminator.
* Unlike ANSI/ISO C ctime(), apr_ctime() does not include
* a \n at the end of the string.
* @param date_str String to write to.
* @param t the time to convert
*/
APR_DECLARE(apr_status_t) apr_ctime(char *date_str, apr_time_t t);
/**
* formats the exploded time according to the format specified
* @param s string to write to
* @param retsize The length of the returned string
* @param max The maximum length of the string
* @param format The format for the time string
* @param tm The time to convert
*/
APR_DECLARE(apr_status_t) apr_strftime(char *s, apr_size_t *retsize,
apr_size_t max, const char *format,
apr_time_exp_t *tm);
/**
* Improve the clock resolution for the lifetime of the given pool.
* Generally this is only desireable on benchmarking and other very
* time-sensitive applications, and has no impact on most platforms.
* @param p The pool to associate the finer clock resolution
*/
APR_DECLARE(void) apr_time_clock_hires(apr_pool_t *p);
/** @} */
#ifdef __cplusplus
}
#endif
#endif /* ! APR_TIME_H */
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