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89 lines
2.6 KiB
C
89 lines
2.6 KiB
C
21 years ago
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/*!
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@file timegm.h
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@brief Declaration of timegm(). The implementation is in localtime.c
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@version $Name: $ $Revision: 1.1 $
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*/
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#ifndef TIMEGM_H_
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#define TIMEGM_H_
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#include <time.h>
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/*
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The following comments are copied from the Makefile of the tz distribution,
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available at ftp://elsie.nci.nih.gov/pub/:
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NIST-PCTS:151-2, Version 1.4, (1993-12-03) is a test suite put
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out by the National Institute of Standards and Technology
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which claims to test C and Posix conformance. If you want to pass PCTS, add
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-DPCTS
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to the end of the "CFLAGS=" line.
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If your system has a "zone abbreviation" field in its "struct tm"s
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(or if you decide to add such a field in your system's "time.h" file),
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add the name to a define such as
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-DTM_ZONE=tm_zone
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or
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-DTM_ZONE=_tm_zone
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to the end of the "CFLAGS=" line.
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If you want functions that were inspired by early versions of X3J11's work,
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add
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-DSTD_INSPIRED
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to the end of the "CFLAGS=" line.
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If you want to allocate state structures in localtime, add
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-DALL_STATE
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to the end of the "CFLAGS=" line. Storage is obtained by calling malloc.
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If you want Source Code Control System ID's left out of object modules, add
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-DNOID
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Add the following to the end of the "CFLAGS=" line as needed.
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-DTZDEFRULESTRING=\",date/time,date/time\" to default to the specified
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DST transitions if the time zone files cannot be accessed
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If you want to use System V compatibility code, add
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-DUSG_COMPAT
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to the end of the "CFLAGS=" line. This arrange for "timezone" and "daylight"
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variables to be kept up-to-date by the time conversion functions. Neither
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"timezone" nor "daylight" is described in X3J11's work.
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If you want an "altzone" variable (a la System V Release 3.1), add
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-DALTZONE
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to the end of the "CFLAGS=" line.
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This variable is not described in X3J11's work.
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If your system has a "GMT offset" field in its "struct tm"s
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(or if you decide to add such a field in your system's "time.h" file),
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add the name to a define such as
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-DTM_GMTOFF=tm_gmtoff
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or
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-DTM_GMTOFF=_tm_gmtoff
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to the end of the "CFLAGS=" line.
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Neither tm_gmtoff nor _tm_gmtoff is described in X3J11's work;
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in its work, use of "tm_gmtoff" is described as non-conforming.
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Both Linux and BSD have done the equivalent of defining TM_GMTOFF in
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their recent releases.
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If you want a "gtime" function (a la MACH), add
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-DCMUCS
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to the end of the "CFLAGS=" line
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This function is not described in X3J11's work.
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*/
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#define STD_INSPIRED
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#define NOID
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#ifdef __cplusplus
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extern "C" {
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#endif
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// The UTC version of mktime
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time_t timegm(struct tm * const tmp);
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#ifdef __cplusplus
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}
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#endif
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#endif // #ifndef TIMEGM_H_
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