[331] | 1 | /*
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| 2 | * Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <openssl/e_os2.h>
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| 11 | #include <string.h>
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| 12 | #include <openssl/crypto.h>
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| 13 |
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| 14 | #ifdef OPENSSL_SYS_VMS
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| 15 | # if __CRTL_VER >= 70000000 && \
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| 16 | (defined _POSIX_C_SOURCE || !defined _ANSI_C_SOURCE)
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| 17 | # define VMS_GMTIME_OK
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| 18 | # endif
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| 19 | # ifndef VMS_GMTIME_OK
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| 20 | # include <libdtdef.h>
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| 21 | # include <lib$routines.h>
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| 22 | # include <lnmdef.h>
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| 23 | # include <starlet.h>
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| 24 | # include <descrip.h>
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| 25 | # include <stdlib.h>
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| 26 | # endif /* ndef VMS_GMTIME_OK */
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| 27 |
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| 28 |
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| 29 | /*
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| 30 | * Needed to pick up the correct definitions and declarations in some of the
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| 31 | * DEC C Header Files (*.H).
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| 32 | */
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| 33 | # define __NEW_STARLET 1
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| 34 |
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| 35 | # if (defined(__alpha) || defined(__ia64))
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| 36 | # include <iledef.h>
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| 37 | # else
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| 38 |
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| 39 | /* VAX */
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| 40 | typedef struct _ile3 { /* Copied from ILEDEF.H for Alpha */
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| 41 | # pragma __nomember_alignment
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| 42 | unsigned short int ile3$w_length; /* Length of buffer in bytes */
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| 43 | unsigned short int ile3$w_code; /* Item code value */
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| 44 | void *ile3$ps_bufaddr; /* Buffer address */
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| 45 | unsigned short int *ile3$ps_retlen_addr; /* Address of word for returned length */
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| 46 | } ILE3;
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| 47 | # endif /* alpha || ia64 */
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| 48 | #endif /* OPENSSL_SYS_VMS */
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| 49 |
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| 50 | struct tm *OPENSSL_gmtime(const time_t *timer, struct tm *result)
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| 51 | {
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| 52 | struct tm *ts = NULL;
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| 53 |
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| 54 | #if defined(OPENSSL_THREADS) && !defined(OPENSSL_SYS_WIN32) && (!defined(OPENSSL_SYS_VMS) || defined(gmtime_r)) && !defined(OPENSSL_SYS_MACOSX)
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| 55 | if (gmtime_r(timer, result) == NULL)
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| 56 | return NULL;
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| 57 | ts = result;
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| 58 | #elif !defined(OPENSSL_SYS_VMS) || defined(VMS_GMTIME_OK)
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| 59 | ts = gmtime(timer);
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| 60 | if (ts == NULL)
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| 61 | return NULL;
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| 62 |
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| 63 | memcpy(result, ts, sizeof(struct tm));
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| 64 | ts = result;
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| 65 | #endif
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| 66 | #if defined( OPENSSL_SYS_VMS) && !defined( VMS_GMTIME_OK)
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| 67 | if (ts == NULL) {
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| 68 | static $DESCRIPTOR(tabnam, "LNM$DCL_LOGICAL");
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| 69 | static $DESCRIPTOR(lognam, "SYS$TIMEZONE_DIFFERENTIAL");
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| 70 | char logvalue[256];
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| 71 | unsigned int reslen = 0;
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| 72 | # if __INITIAL_POINTER_SIZE == 64
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| 73 | ILEB_64 itemlist[2], *pitem;
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| 74 | # else
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| 75 | ILE3 itemlist[2], *pitem;
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| 76 | # endif
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| 77 | int status;
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| 78 | time_t t;
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| 79 |
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| 80 |
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| 81 | /*
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| 82 | * Setup an itemlist for the call to $TRNLNM - Translate Logical Name.
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| 83 | */
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| 84 | pitem = itemlist;
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| 85 |
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| 86 | # if __INITIAL_POINTER_SIZE == 64
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| 87 | pitem->ileb_64$w_mbo = 1;
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| 88 | pitem->ileb_64$w_code = LNM$_STRING;
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| 89 | pitem->ileb_64$l_mbmo = -1;
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| 90 | pitem->ileb_64$q_length = sizeof (logvalue);
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| 91 | pitem->ileb_64$pq_bufaddr = logvalue;
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| 92 | pitem->ileb_64$pq_retlen_addr = (unsigned __int64 *) &reslen;
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| 93 | pitem++;
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| 94 | /* Last item of the item list is null terminated */
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| 95 | pitem->ileb_64$q_length = pitem->ileb_64$w_code = 0;
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| 96 | # else
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| 97 | pitem->ile3$w_length = sizeof (logvalue);
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| 98 | pitem->ile3$w_code = LNM$_STRING;
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| 99 | pitem->ile3$ps_bufaddr = logvalue;
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| 100 | pitem->ile3$ps_retlen_addr = (unsigned short int *) &reslen;
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| 101 | pitem++;
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| 102 | /* Last item of the item list is null terminated */
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| 103 | pitem->ile3$w_length = pitem->ile3$w_code = 0;
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| 104 | # endif
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| 105 |
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| 106 |
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| 107 | /* Get the value for SYS$TIMEZONE_DIFFERENTIAL */
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| 108 | status = sys$trnlnm(0, &tabnam, &lognam, 0, itemlist);
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| 109 | if (!(status & 1))
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| 110 | return NULL;
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| 111 | logvalue[reslen] = '\0';
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| 112 |
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| 113 | t = *timer;
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| 114 |
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| 115 | /* The following is extracted from the DEC C header time.h */
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| 116 | /*
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| 117 | ** Beginning in OpenVMS Version 7.0 mktime, time, ctime, strftime
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| 118 | ** have two implementations. One implementation is provided
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| 119 | ** for compatibility and deals with time in terms of local time,
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| 120 | ** the other __utc_* deals with time in terms of UTC.
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| 121 | */
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| 122 | /*
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| 123 | * We use the same conditions as in said time.h to check if we should
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| 124 | * assume that t contains local time (and should therefore be
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| 125 | * adjusted) or UTC (and should therefore be left untouched).
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| 126 | */
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| 127 | # if __CRTL_VER < 70000000 || defined _VMS_V6_SOURCE
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| 128 | /* Get the numerical value of the equivalence string */
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| 129 | status = atoi(logvalue);
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| 130 |
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| 131 | /* and use it to move time to GMT */
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| 132 | t -= status;
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| 133 | # endif
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| 134 |
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| 135 | /* then convert the result to the time structure */
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| 136 |
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| 137 | /*
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| 138 | * Since there was no gmtime_r() to do this stuff for us, we have to
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| 139 | * do it the hard way.
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| 140 | */
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| 141 | {
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| 142 | /*-
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| 143 | * The VMS epoch is the astronomical Smithsonian date,
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| 144 | if I remember correctly, which is November 17, 1858.
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| 145 | Furthermore, time is measure in tenths of microseconds
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| 146 | and stored in quadwords (64 bit integers). unix_epoch
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| 147 | below is January 1st 1970 expressed as a VMS time. The
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| 148 | following code was used to get this number:
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| 149 |
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| 150 | #include <stdio.h>
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| 151 | #include <stdlib.h>
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| 152 | #include <lib$routines.h>
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| 153 | #include <starlet.h>
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| 154 |
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| 155 | main()
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| 156 | {
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| 157 | unsigned long systime[2];
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| 158 | unsigned short epoch_values[7] =
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| 159 | { 1970, 1, 1, 0, 0, 0, 0 };
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| 160 |
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| 161 | lib$cvt_vectim(epoch_values, systime);
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| 162 |
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| 163 | printf("%u %u", systime[0], systime[1]);
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| 164 | }
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| 165 | */
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| 166 | unsigned long unix_epoch[2] = { 1273708544, 8164711 };
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| 167 | unsigned long deltatime[2];
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| 168 | unsigned long systime[2];
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| 169 | struct vms_vectime {
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| 170 | short year, month, day, hour, minute, second, centi_second;
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| 171 | } time_values;
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| 172 | long operation;
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| 173 |
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| 174 | /*
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| 175 | * Turn the number of seconds since January 1st 1970 to an
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| 176 | * internal delta time. Note that lib$cvt_to_internal_time() will
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| 177 | * assume that t is signed, and will therefore break on 32-bit
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| 178 | * systems some time in 2038.
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| 179 | */
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| 180 | operation = LIB$K_DELTA_SECONDS;
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| 181 | status = lib$cvt_to_internal_time(&operation, &t, deltatime);
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| 182 |
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| 183 | /*
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| 184 | * Add the delta time with the Unix epoch and we have the current
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| 185 | * UTC time in internal format
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| 186 | */
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| 187 | status = lib$add_times(unix_epoch, deltatime, systime);
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| 188 |
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| 189 | /* Turn the internal time into a time vector */
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| 190 | status = sys$numtim(&time_values, systime);
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| 191 |
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| 192 | /* Fill in the struct tm with the result */
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| 193 | result->tm_sec = time_values.second;
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| 194 | result->tm_min = time_values.minute;
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| 195 | result->tm_hour = time_values.hour;
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| 196 | result->tm_mday = time_values.day;
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| 197 | result->tm_mon = time_values.month - 1;
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| 198 | result->tm_year = time_values.year - 1900;
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| 199 |
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| 200 | operation = LIB$K_DAY_OF_WEEK;
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| 201 | status = lib$cvt_from_internal_time(&operation,
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| 202 | &result->tm_wday, systime);
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| 203 | result->tm_wday %= 7;
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| 204 |
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| 205 | operation = LIB$K_DAY_OF_YEAR;
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| 206 | status = lib$cvt_from_internal_time(&operation,
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| 207 | &result->tm_yday, systime);
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| 208 | result->tm_yday--;
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| 209 |
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| 210 | result->tm_isdst = 0; /* There's no way to know... */
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| 211 |
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| 212 | ts = result;
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| 213 | }
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| 214 | }
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| 215 | #endif
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| 216 | return ts;
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| 217 | }
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| 218 |
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| 219 | /*
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| 220 | * Take a tm structure and add an offset to it. This avoids any OS issues
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| 221 | * with restricted date types and overflows which cause the year 2038
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| 222 | * problem.
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| 223 | */
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| 224 |
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| 225 | #define SECS_PER_DAY (24 * 60 * 60)
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| 226 |
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| 227 | static long date_to_julian(int y, int m, int d);
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| 228 | static void julian_to_date(long jd, int *y, int *m, int *d);
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| 229 | static int julian_adj(const struct tm *tm, int off_day, long offset_sec,
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| 230 | long *pday, int *psec);
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| 231 |
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| 232 | int OPENSSL_gmtime_adj(struct tm *tm, int off_day, long offset_sec)
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| 233 | {
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| 234 | int time_sec, time_year, time_month, time_day;
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| 235 | long time_jd;
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| 236 |
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| 237 | /* Convert time and offset into Julian day and seconds */
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| 238 | if (!julian_adj(tm, off_day, offset_sec, &time_jd, &time_sec))
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| 239 | return 0;
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| 240 |
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| 241 | /* Convert Julian day back to date */
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| 242 |
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| 243 | julian_to_date(time_jd, &time_year, &time_month, &time_day);
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| 244 |
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| 245 | if (time_year < 1900 || time_year > 9999)
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| 246 | return 0;
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| 247 |
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| 248 | /* Update tm structure */
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| 249 |
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| 250 | tm->tm_year = time_year - 1900;
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| 251 | tm->tm_mon = time_month - 1;
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| 252 | tm->tm_mday = time_day;
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| 253 |
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| 254 | tm->tm_hour = time_sec / 3600;
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| 255 | tm->tm_min = (time_sec / 60) % 60;
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| 256 | tm->tm_sec = time_sec % 60;
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| 257 |
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| 258 | return 1;
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| 259 |
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| 260 | }
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| 261 |
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| 262 | int OPENSSL_gmtime_diff(int *pday, int *psec,
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| 263 | const struct tm *from, const struct tm *to)
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| 264 | {
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| 265 | int from_sec, to_sec, diff_sec;
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| 266 | long from_jd, to_jd, diff_day;
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| 267 | if (!julian_adj(from, 0, 0, &from_jd, &from_sec))
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| 268 | return 0;
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| 269 | if (!julian_adj(to, 0, 0, &to_jd, &to_sec))
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| 270 | return 0;
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| 271 | diff_day = to_jd - from_jd;
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| 272 | diff_sec = to_sec - from_sec;
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| 273 | /* Adjust differences so both positive or both negative */
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| 274 | if (diff_day > 0 && diff_sec < 0) {
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| 275 | diff_day--;
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| 276 | diff_sec += SECS_PER_DAY;
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| 277 | }
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| 278 | if (diff_day < 0 && diff_sec > 0) {
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| 279 | diff_day++;
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| 280 | diff_sec -= SECS_PER_DAY;
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| 281 | }
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| 282 |
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| 283 | if (pday)
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| 284 | *pday = (int)diff_day;
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| 285 | if (psec)
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| 286 | *psec = diff_sec;
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| 287 |
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| 288 | return 1;
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| 289 |
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| 290 | }
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| 291 |
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| 292 | /* Convert tm structure and offset into julian day and seconds */
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| 293 | static int julian_adj(const struct tm *tm, int off_day, long offset_sec,
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| 294 | long *pday, int *psec)
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| 295 | {
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| 296 | int offset_hms, offset_day;
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| 297 | long time_jd;
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| 298 | int time_year, time_month, time_day;
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| 299 | /* split offset into days and day seconds */
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| 300 | offset_day = offset_sec / SECS_PER_DAY;
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| 301 | /* Avoid sign issues with % operator */
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| 302 | offset_hms = offset_sec - (offset_day * SECS_PER_DAY);
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| 303 | offset_day += off_day;
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| 304 | /* Add current time seconds to offset */
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| 305 | offset_hms += tm->tm_hour * 3600 + tm->tm_min * 60 + tm->tm_sec;
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| 306 | /* Adjust day seconds if overflow */
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| 307 | if (offset_hms >= SECS_PER_DAY) {
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| 308 | offset_day++;
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| 309 | offset_hms -= SECS_PER_DAY;
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| 310 | } else if (offset_hms < 0) {
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| 311 | offset_day--;
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| 312 | offset_hms += SECS_PER_DAY;
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| 313 | }
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| 314 |
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| 315 | /*
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| 316 | * Convert date of time structure into a Julian day number.
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| 317 | */
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| 318 |
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| 319 | time_year = tm->tm_year + 1900;
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| 320 | time_month = tm->tm_mon + 1;
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| 321 | time_day = tm->tm_mday;
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| 322 |
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| 323 | time_jd = date_to_julian(time_year, time_month, time_day);
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| 324 |
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| 325 | /* Work out Julian day of new date */
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| 326 | time_jd += offset_day;
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| 327 |
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| 328 | if (time_jd < 0)
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| 329 | return 0;
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| 330 |
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| 331 | *pday = time_jd;
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| 332 | *psec = offset_hms;
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| 333 | return 1;
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| 334 | }
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| 335 |
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| 336 | /*
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| 337 | * Convert date to and from julian day Uses Fliegel & Van Flandern algorithm
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| 338 | */
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| 339 | static long date_to_julian(int y, int m, int d)
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| 340 | {
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| 341 | return (1461 * (y + 4800 + (m - 14) / 12)) / 4 +
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| 342 | (367 * (m - 2 - 12 * ((m - 14) / 12))) / 12 -
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| 343 | (3 * ((y + 4900 + (m - 14) / 12) / 100)) / 4 + d - 32075;
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| 344 | }
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| 345 |
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| 346 | static void julian_to_date(long jd, int *y, int *m, int *d)
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| 347 | {
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| 348 | long L = jd + 68569;
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| 349 | long n = (4 * L) / 146097;
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| 350 | long i, j;
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| 351 |
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| 352 | L = L - (146097 * n + 3) / 4;
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| 353 | i = (4000 * (L + 1)) / 1461001;
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| 354 | L = L - (1461 * i) / 4 + 31;
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| 355 | j = (80 * L) / 2447;
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| 356 | *d = L - (2447 * j) / 80;
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| 357 | L = j / 11;
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| 358 | *m = j + 2 - (12 * L);
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| 359 | *y = 100 * (n - 49) + i + L;
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| 360 | }
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