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101 lines
2.2 KiB
C
101 lines
2.2 KiB
C
/*-
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* Copyright (c) 2001 FreeBSD Inc.
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* All rights reserved.
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*
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* These routines are for converting time_t to fixed-bit representations
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* for use in protocols or storage. When converting time to a larger
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* representation of time_t these routines are expected to assume temporal
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* locality and use the 50-year rule to properly set the msb bits. XXX
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*
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* Redistribution and use under the terms of the COPYRIGHT file at the
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* base of the source tree.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/time.h>
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/*
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* Convert a 32 bit representation of time_t into time_t. XXX needs to
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* implement the 50-year rule to handle post-2038 conversions.
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*/
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time_t
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_time32_to_time(__int32_t t32)
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{
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return((time_t)t32);
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}
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/*
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* Convert time_t to a 32 bit representation. If time_t is 64 bits we can
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* simply chop it down. The resulting 32 bit representation can be
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* converted back to a temporally local 64 bit time_t using time32_to_time.
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*/
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__int32_t
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_time_to_time32(time_t t)
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{
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return((__int32_t)t);
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}
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/*
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* Convert a 64 bit representation of time_t into time_t. If time_t is
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* represented as 32 bits we can simply chop it and not support times
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* past 2038.
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*/
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time_t
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_time64_to_time(__int64_t t64)
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{
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return((time_t)t64);
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}
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/*
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* Convert time_t to a 64 bit representation. If time_t is represented
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* as 32 bits we simply sign-extend and do not support times past 2038.
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*/
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__int64_t
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_time_to_time64(time_t t)
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{
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return((__int64_t)t);
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}
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/*
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* Convert to/from 'long'. Depending on the sizeof(long) this may or
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* may not require using the 50-year rule.
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*/
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long
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_time_to_long(time_t t)
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{
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if (sizeof(long) == sizeof(__int64_t))
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return(_time_to_time64(t));
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return((long)t);
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}
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time_t
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_long_to_time(long tlong)
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{
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if (sizeof(long) == sizeof(__int32_t))
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return(_time32_to_time(tlong));
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return((time_t)tlong);
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}
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/*
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* Convert to/from 'int'. Depending on the sizeof(int) this may or
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* may not require using the 50-year rule.
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*/
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int
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_time_to_int(time_t t)
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{
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if (sizeof(int) == sizeof(__int64_t))
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return(_time_to_time64(t));
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return((int)t);
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}
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time_t
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_int_to_time(int tint)
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{
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if (sizeof(int) == sizeof(__int32_t))
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return(_time32_to_time(tint));
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return((time_t)tint);
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}
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