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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