1*f4228790SPeter Avalos /*- 2*f4228790SPeter Avalos * Copyright (c) 2001 FreeBSD Inc. 3*f4228790SPeter Avalos * All rights reserved. 4*f4228790SPeter Avalos * 5*f4228790SPeter Avalos * These routines are for converting time_t to fixed-bit representations 6*f4228790SPeter Avalos * for use in protocols or storage. When converting time to a larger 7*f4228790SPeter Avalos * representation of time_t these routines are expected to assume temporal 8*f4228790SPeter Avalos * locality and use the 50-year rule to properly set the msb bits. XXX 9*f4228790SPeter Avalos * 10*f4228790SPeter Avalos * Redistribution and use under the terms of the COPYRIGHT file at the 11*f4228790SPeter Avalos * base of the source tree. 12*f4228790SPeter Avalos * 13*f4228790SPeter Avalos * $FreeBSD: src/lib/libc/stdtime/time32.c,v 1.5 2002/06/17 01:42:29 wollman Exp $ 14*f4228790SPeter Avalos */ 15*f4228790SPeter Avalos 16*f4228790SPeter Avalos #include <sys/types.h> 17*f4228790SPeter Avalos #include <timeconv.h> 18*f4228790SPeter Avalos 19*f4228790SPeter Avalos /* 20*f4228790SPeter Avalos * Convert a 32 bit representation of time_t into time_t. XXX needs to 21*f4228790SPeter Avalos * implement the 50-year rule to handle post-2038 conversions. 22*f4228790SPeter Avalos */ 23*f4228790SPeter Avalos time_t 24*f4228790SPeter Avalos _time32_to_time(__int32_t t32) 25*f4228790SPeter Avalos { 26*f4228790SPeter Avalos 27*f4228790SPeter Avalos return((time_t)t32); 28*f4228790SPeter Avalos } 29*f4228790SPeter Avalos 30*f4228790SPeter Avalos /* 31*f4228790SPeter Avalos * Convert time_t to a 32 bit representation. If time_t is 64 bits we can 32*f4228790SPeter Avalos * simply chop it down. The resulting 32 bit representation can be 33*f4228790SPeter Avalos * converted back to a temporally local 64 bit time_t using time32_to_time. 34*f4228790SPeter Avalos */ 35*f4228790SPeter Avalos __int32_t 36*f4228790SPeter Avalos _time_to_time32(time_t t) 37*f4228790SPeter Avalos { 38*f4228790SPeter Avalos 39*f4228790SPeter Avalos return((__int32_t)t); 40*f4228790SPeter Avalos } 41*f4228790SPeter Avalos 42*f4228790SPeter Avalos /* 43*f4228790SPeter Avalos * Convert a 64 bit representation of time_t into time_t. If time_t is 44*f4228790SPeter Avalos * represented as 32 bits we can simply chop it and not support times 45*f4228790SPeter Avalos * past 2038. 46*f4228790SPeter Avalos */ 47*f4228790SPeter Avalos time_t 48*f4228790SPeter Avalos _time64_to_time(__int64_t t64) 49*f4228790SPeter Avalos { 50*f4228790SPeter Avalos 51*f4228790SPeter Avalos return((time_t)t64); 52*f4228790SPeter Avalos } 53*f4228790SPeter Avalos 54*f4228790SPeter Avalos /* 55*f4228790SPeter Avalos * Convert time_t to a 64 bit representation. If time_t is represented 56*f4228790SPeter Avalos * as 32 bits we simply sign-extend and do not support times past 2038. 57*f4228790SPeter Avalos */ 58*f4228790SPeter Avalos __int64_t 59*f4228790SPeter Avalos _time_to_time64(time_t t) 60*f4228790SPeter Avalos { 61*f4228790SPeter Avalos 62*f4228790SPeter Avalos return((__int64_t)t); 63*f4228790SPeter Avalos } 64*f4228790SPeter Avalos 65*f4228790SPeter Avalos /* 66*f4228790SPeter Avalos * Convert to/from 'long'. Depending on the sizeof(long) this may or 67*f4228790SPeter Avalos * may not require using the 50-year rule. 68*f4228790SPeter Avalos */ 69*f4228790SPeter Avalos long 70*f4228790SPeter Avalos _time_to_long(time_t t) 71*f4228790SPeter Avalos { 72*f4228790SPeter Avalos 73*f4228790SPeter Avalos if (sizeof(long) == sizeof(__int64_t)) 74*f4228790SPeter Avalos return(_time_to_time64(t)); 75*f4228790SPeter Avalos return((long)t); 76*f4228790SPeter Avalos } 77*f4228790SPeter Avalos 78*f4228790SPeter Avalos time_t 79*f4228790SPeter Avalos _long_to_time(long tlong) 80*f4228790SPeter Avalos { 81*f4228790SPeter Avalos 82*f4228790SPeter Avalos if (sizeof(long) == sizeof(__int32_t)) 83*f4228790SPeter Avalos return(_time32_to_time(tlong)); 84*f4228790SPeter Avalos return((time_t)tlong); 85*f4228790SPeter Avalos } 86*f4228790SPeter Avalos 87*f4228790SPeter Avalos /* 88*f4228790SPeter Avalos * Convert to/from 'int'. Depending on the sizeof(int) this may or 89*f4228790SPeter Avalos * may not require using the 50-year rule. 90*f4228790SPeter Avalos */ 91*f4228790SPeter Avalos int 92*f4228790SPeter Avalos _time_to_int(time_t t) 93*f4228790SPeter Avalos { 94*f4228790SPeter Avalos 95*f4228790SPeter Avalos if (sizeof(int) == sizeof(__int64_t)) 96*f4228790SPeter Avalos return(_time_to_time64(t)); 97*f4228790SPeter Avalos return((int)t); 98*f4228790SPeter Avalos } 99*f4228790SPeter Avalos 100*f4228790SPeter Avalos time_t 101*f4228790SPeter Avalos _int_to_time(int tint) 102*f4228790SPeter Avalos { 103*f4228790SPeter Avalos 104*f4228790SPeter Avalos if (sizeof(int) == sizeof(__int32_t)) 105*f4228790SPeter Avalos return(_time32_to_time(tint)); 106*f4228790SPeter Avalos return((time_t)tint); 107*f4228790SPeter Avalos } 108