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annotate packages/language/c/libc/time/current/include/time.inl @ 115:6ed91473a1cd ecos-sw-2000-08-21

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Merge from eCos master repository on 2000-08-21-22:40:54-BST
author jlarmour
date Fri, 25 Aug 2000 17:32:38 +0000
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children 0ae0bc38e387
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1 #ifndef CYGONCE_LIBC_TIME_INL
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2 #define CYGONCE_LIBC_TIME_INL
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3 //===========================================================================
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4 //
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5 // time.inl
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6 //
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7 // Inline implementations of date and time routines from <time.h>
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8 //
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9 //===========================================================================
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10 //####COPYRIGHTBEGIN####
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11 //
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12 // -------------------------------------------
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13 // The contents of this file are subject to the Red Hat eCos Public License
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14 // Version 1.1 (the "License"); you may not use this file except in
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15 // compliance with the License. You may obtain a copy of the License at
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16 // http://www.redhat.com/
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17 //
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18 // Software distributed under the License is distributed on an "AS IS"
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19 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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20 // License for the specific language governing rights and limitations under
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21 // the License.
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22 //
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23 // The Original Code is eCos - Embedded Configurable Operating System,
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24 // released September 30, 1998.
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25 //
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26 // The Initial Developer of the Original Code is Red Hat.
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27 // Portions created by Red Hat are
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28 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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29 // All Rights Reserved.
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30 // -------------------------------------------
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31 //
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32 //####COPYRIGHTEND####
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33 //===========================================================================
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34 //#####DESCRIPTIONBEGIN####
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35 //
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36 // Author(s): jlarmour
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37 // Contributors:
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38 // Date: 1999-02-25
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39 // Purpose: Provide inline implementations for some of the date and time
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40 // routines declared in <time.h> for ISO C section 7.12 and
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41 // POSIX 1003.1 8.3.4-8.3.7
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42 // Description:
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43 // Usage: Do not include this file directly. Instead include <time.h>
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44 //
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45 //####DESCRIPTIONEND####
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46 //
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47 //===========================================================================
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48
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49 // CONFIGURATION
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50
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51 #include <pkgconf/libc_time.h> // C library configuration
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52
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53 // INCLUDES
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54
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55 #include <cyg/infra/cyg_type.h> // Common type definitions and support
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56 #include <time.h> // Header for this file
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57 #include <cyg/infra/cyg_ass.h> // Assertion infrastructure
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58 #include <cyg/infra/cyg_trac.h> // Tracing infrastructure
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59
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60 // DEFINES
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61
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62 // The following are overriden by the libc implementation to get a non-inline
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63 // version to prevent duplication of code
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64
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65 #ifndef CYGPRI_LIBC_TIME_ASCTIME_R_INLINE
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66 # define CYGPRI_LIBC_TIME_ASCTIME_R_INLINE extern __inline__
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67 #endif
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68
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69 #ifndef CYGPRI_LIBC_TIME_CTIME_R_INLINE
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70 # define CYGPRI_LIBC_TIME_CTIME_R_INLINE extern __inline__
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71 #endif
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72
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73 #ifndef CYGPRI_LIBC_TIME_GMTIME_R_INLINE
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74 # define CYGPRI_LIBC_TIME_GMTIME_R_INLINE extern __inline__
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75 #endif
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76
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77 #ifndef CYGPRI_LIBC_TIME_LOCALTIME_R_INLINE
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78 # define CYGPRI_LIBC_TIME_LOCALTIME_R_INLINE extern __inline__
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79 #endif
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80
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81 #ifndef CYGPRI_LIBC_TIME_DIFFTIME_INLINE
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82 # define CYGPRI_LIBC_TIME_DIFFTIME_INLINE extern __inline__
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83 #endif
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84
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85 #ifndef CYGPRI_LIBC_TIME_MKTIME_INLINE
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86 # define CYGPRI_LIBC_TIME_MKTIME_INLINE extern __inline__
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87 #endif
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88
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89 #ifndef CYGPRI_LIBC_TIME_ASCTIME_INLINE
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90 # define CYGPRI_LIBC_TIME_ASCTIME_INLINE extern __inline__
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91 #endif
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92
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93 #ifndef CYGPRI_LIBC_TIME_CTIME_INLINE
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94 # define CYGPRI_LIBC_TIME_CTIME_INLINE extern __inline__
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95 #endif
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96
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97 #ifndef CYGPRI_LIBC_TIME_GMTIME_INLINE
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98 # define CYGPRI_LIBC_TIME_GMTIME_INLINE extern __inline__
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99 #endif
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100
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101 #ifndef CYGPRI_LIBC_TIME_LOCALTIME_INLINE
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102 # define CYGPRI_LIBC_TIME_LOCALTIME_INLINE extern __inline__
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103 #endif
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104
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105 #ifndef CYGPRI_LIBC_TIME_GETZONEOFFSETS_INLINE
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106 # define CYGPRI_LIBC_TIME_GETZONEOFFSETS_INLINE extern __inline__
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107 #endif
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108
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109 #ifndef CYGPRI_LIBC_TIME_SETZONEOFFSETS_INLINE
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110 # define CYGPRI_LIBC_TIME_SETZONEOFFSETS_INLINE extern __inline__
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111 #endif
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112
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113 #ifndef CYGPRI_LIBC_TIME_SETDST_INLINE
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114 # define CYGPRI_LIBC_TIME_SETDST_INLINE extern __inline__
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115 #endif
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116
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117 #define CYGNUM_LIBC_TIME_EPOCH_WDAY 4 // Jan 1st 1970 was a Thursday
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118
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119 #ifdef __cplusplus
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120 extern "C" {
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121 #endif
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122
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123 // EXTERNS
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124
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125 // These are used in the dst access functions below. Do not access these
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126 // directly - use the functions declared in time.h instead
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127
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128 extern Cyg_libc_time_dst cyg_libc_time_current_dst_stat;
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129 extern time_t cyg_libc_time_current_std_offset;
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130 extern time_t cyg_libc_time_current_dst_offset;
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131
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132 // INLINE FUNCTIONS
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133
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134 //===========================================================================
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135 //
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136 // Utility functions
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137
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138 //////////////////////////////////
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139 // cyg_libc_time_year_is_leap() //
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140 //////////////////////////////////
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141 //
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142 // This returns true if the year is a leap year.
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143 // The argument is of type int in line with struct tm
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144 //
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145
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146 static __inline__ cyg_bool
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147 cyg_libc_time_year_is_leap( int __year )
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148 {
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149 cyg_bool _leap=false;
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150
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151 if (!(__year % 400))
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152 _leap = true;
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153 else if (!(__year % 4) && (__year % 100))
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154 _leap = true;
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155 return _leap;
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156 } // cyg_libc_time_year_is_leap()
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157
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158
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159 ////////////////////////////////////
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160 // cyg_libc_time_getzoneoffsets() //
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161 ////////////////////////////////////
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162 //
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163 // This function retrieves the current state of the Daylight Savings Time
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164 // and the offsets of both STD and DST
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165 // The offsets are both in time_t's i.e. seconds
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166 //
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167
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168 CYGPRI_LIBC_TIME_GETZONEOFFSETS_INLINE Cyg_libc_time_dst
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169 cyg_libc_time_getzoneoffsets( time_t *__stdoffset, time_t *__dstoffset )
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170 {
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171 CYG_REPORT_FUNCNAMETYPE("cyg_libc_time_getzoneoffsets",
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172 "returning DST state %d");
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173 CYG_REPORT_FUNCARG2("__stdoffset is at address %08x, "
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174 "__dstoffset is at %08x", __stdoffset, __dstoffset);
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175
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176 CYG_CHECK_DATA_PTR(__stdoffset, "__stdoffset is not a valid pointer!");
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177 CYG_CHECK_DATA_PTR(__dstoffset, "__dstoffset is not a valid pointer!");
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178
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179 *__stdoffset = cyg_libc_time_current_std_offset;
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180 *__dstoffset = cyg_libc_time_current_dst_offset;
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181
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182 CYG_REPORT_RETVAL(cyg_libc_time_current_dst_stat);
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183
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184 return cyg_libc_time_current_dst_stat;
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185 } // cyg_libc_time_getzoneoffsets()
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186
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187
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188 ////////////////////////////////////
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189 // cyg_libc_time_setzoneoffsets() //
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190 ////////////////////////////////////
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191 //
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192 // This function sets the offsets used when Daylight Savings Time is enabled
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193 // or disabled. The offsets are in time_t's i.e. seconds
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194 //
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195
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196 CYGPRI_LIBC_TIME_SETZONEOFFSETS_INLINE void
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197 cyg_libc_time_setzoneoffsets( time_t __stdoffset, time_t __dstoffset )
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198 {
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199 CYG_REPORT_FUNCNAME("cyg_libc_time_setzoneoffsets");
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200 CYG_REPORT_FUNCARG2DV(__stdoffset, __dstoffset);
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201
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202 cyg_libc_time_current_std_offset = __stdoffset;
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203 cyg_libc_time_current_dst_offset = __dstoffset;
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204
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205 CYG_REPORT_RETURN();
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206 } // cyg_libc_time_setzoneoffsets()
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207
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208
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209 ////////////////////////////
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210 // cyg_libc_time_setdst() //
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211 ////////////////////////////
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212 //
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213 // This function sets the state of Daylight Savings Time: on, off, or unknown
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214 //
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215
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216 CYGPRI_LIBC_TIME_SETDST_INLINE void
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217 cyg_libc_time_setdst( Cyg_libc_time_dst __state )
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218 {
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219 CYG_REPORT_FUNCNAME("cyg_libc_time_setdst");
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220 CYG_REPORT_FUNCARG1("__state=%d", __state);
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221
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222 cyg_libc_time_current_dst_stat = __state;
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223
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224 CYG_REPORT_RETURN();
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225 } // cyg_libc_time_setdst()
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226
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227
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228
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229 //===========================================================================
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230 //
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231 // POSIX 1003.1 functions
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232
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233 /////////////////////////////////
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234 // asctime_r() - POSIX.1 8.3.4 //
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235 /////////////////////////////////
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236 //
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237 // This returns a textual representation of a struct tm, and writes
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238 // the string to return into __buf
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239 //
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240
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241 #ifdef CYGIMP_LIBC_TIME_ASCTIME_R_INLINE
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242
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243 #include <stdio.h> // for sprintf()
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244 #include <cyg/libc/time/timeutil.h> // for cyg_libc_time_{day,month}_name
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245 // and cyg_libc_time_itoa()
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246 #include <string.h> // for memcpy()
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247
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248 CYGPRI_LIBC_TIME_ASCTIME_R_INLINE char *
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249 asctime_r( const struct tm *__timeptr, char *__buf )
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250 {
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251 cyg_uint8 __i;
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252
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253 // These initializers are [4] since C++ dictates you _must_ leave space
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254 // for the trailing '\0', even though ISO C says you don't need to!
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255
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256 CYG_REPORT_FUNCNAMETYPE("asctime_r", "returning \"%s\"");
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257 CYG_REPORT_FUNCARG2("__timeptr = %08x, __buf = %08x", __timeptr, __buf);
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258
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259 // paranoia - most of these aren't required but could be helpful to
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260 // a programmer debugging their own app.
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261 CYG_CHECK_DATA_PTR(__timeptr, "__timeptr is not a valid pointer!");
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262 CYG_CHECK_DATA_PTR(__buf, "__buf is not a valid pointer!");
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263
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264 CYG_PRECONDITION((__timeptr->tm_sec >= 0) && (__timeptr->tm_sec < 62),
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265 "__timeptr->tm_sec out of range!");
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266 CYG_PRECONDITION((__timeptr->tm_min >= 0) && (__timeptr->tm_min < 60),
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267 "__timeptr->tm_min out of range!");
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268 CYG_PRECONDITION((__timeptr->tm_hour >= 0) && (__timeptr->tm_hour < 24),
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269 "__timeptr->tm_hour out of range!");
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270 // Currently I don't check _actual_ numbers of days in each month here
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271 // FIXME: No reason why not though
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272 CYG_PRECONDITION((__timeptr->tm_mday >= 1) && (__timeptr->tm_mday < 32),
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273 "__timeptr->tm_mday out of range!");
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274 CYG_PRECONDITION((__timeptr->tm_mon >= 0) && (__timeptr->tm_mon < 12),
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275 "__timeptr->tm_mon out of range!");
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276 CYG_PRECONDITION((__timeptr->tm_wday >= 0) && (__timeptr->tm_wday < 7),
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277 "__timeptr->tm_wday out of range!");
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278 CYG_PRECONDITION((__timeptr->tm_yday >= 0) && (__timeptr->tm_yday < 366),
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279 "__timeptr->tm_yday out of range!");
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280 CYG_PRECONDITION((__timeptr->tm_year > -1900) &&
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281 (__timeptr->tm_year < 8100),
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282 "__timeptr->tm_year out of range!");
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283
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284 // we can't use strftime because ISO C is stupid enough not to allow
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285 // the strings in asctime() to be localized. Duh.
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286
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287 // day of the week
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288 memcpy(&__buf[0], cyg_libc_time_day_name[__timeptr->tm_wday], 3);
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289 __buf[3] = ' ';
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290
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291 // month
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292 memcpy(&__buf[4], cyg_libc_time_month_name[__timeptr->tm_mon], 3);
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293 __buf[7] = ' ';
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294
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295 __i = 8;
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296
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297 // day of the month
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298 __i += cyg_libc_time_itoa( (cyg_uint8 *)&__buf[__i], __timeptr->tm_mday, 2,
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299 true);
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300 __buf[__i++] = ' ';
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301
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302 // hour
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303 __i += cyg_libc_time_itoa( (cyg_uint8 *)&__buf[__i], __timeptr->tm_hour, 2,
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304 true);
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305 __buf[__i++] = ':';
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306
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307 // minute
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308 __i += cyg_libc_time_itoa( (cyg_uint8 *)&__buf[__i], __timeptr->tm_min, 2,
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309 true);
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310 __buf[__i++] = ':';
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311
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312 // second
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313 __i += cyg_libc_time_itoa((cyg_uint8 *) &__buf[__i], __timeptr->tm_sec, 2,
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314 true);
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315 __buf[__i++] = ' ';
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316
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317 // year
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318 __i += cyg_libc_time_itoa( (cyg_uint8 *)&__buf[__i],
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319 1900+__timeptr->tm_year, 0, true);
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320
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321 __buf[__i++] = '\n';
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322 __buf[__i++] = '\0';
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323
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324 CYG_REPORT_RETVAL(__buf);
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325 return __buf;
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326 } // asctime_r()
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327
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328 #endif // ifdef CYGIMP_LIBC_TIME_ASCTIME_R_INLINE
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329
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330 ////////////////////////////////
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331 // gmtime_r() - POSIX.1 8.3.6 //
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332 ////////////////////////////////
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333 //
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334 // This converts a time_t into a struct tm expressed in UTC, and stores
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335 // the result in the space occupied by __result
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336 //
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337
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338 #ifdef CYGIMP_LIBC_TIME_GMTIME_R_INLINE
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339
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340 #include <cyg/libc/time/timeutil.h> // for cyg_libc_time_month_lengths
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341
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342 CYGPRI_LIBC_TIME_GMTIME_R_INLINE struct tm *
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343 gmtime_r( const time_t *__timer, struct tm *__result )
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344 {
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345 time_t _tim;
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346 const cyg_uint8 *_months_p;
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347
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348 CYG_REPORT_FUNCNAMETYPE("gmtime_r", "returning %08x");
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349 CYG_CHECK_DATA_PTR(__timer, "__timer is not a valid pointer!");
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350 CYG_CHECK_DATA_PTR(__result, "__result is not a valid pointer!");
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351 CYG_REPORT_FUNCARG2("*__timer=%d, __result is at %08x",
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352 *__timer, __result);
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353
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354 #define CYGNUM_LIBC_TIME_SECSPERDAY (60*60*24)
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355 #define CYGNUM_LIBC_TIME_SECSPERYEAR (CYGNUM_LIBC_TIME_SECSPERDAY * 365)
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356 #define CYGNUM_LIBC_TIME_SECSPERLEAPYEAR (CYGNUM_LIBC_TIME_SECSPERDAY * 366)
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357
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358 _tim = *__timer;
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359
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360 // First, work out year. Start off with 1970 and work forwards or backwards
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361 // depending on the sign of _tim
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362 __result->tm_year = 70;
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363
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364 // we also work out the day of the week of the start of the year as we
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365 // go along
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366 __result->tm_wday = CYGNUM_LIBC_TIME_EPOCH_WDAY;
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367
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368 while (_tim < 0) {
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369 // Work backwards
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370
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371 --__result->tm_year;
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372
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373 // Check for a leap year.
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374 if (cyg_libc_time_year_is_leap(1900 + __result->tm_year)) {
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375 _tim += CYGNUM_LIBC_TIME_SECSPERLEAPYEAR;
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376 __result->tm_wday -= 366;
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377 } // if
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378 else {
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379 _tim += CYGNUM_LIBC_TIME_SECSPERYEAR;
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380 __result->tm_wday -= 365;
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381 } // else
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382
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383 } // while
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384
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385 while (_tim >= CYGNUM_LIBC_TIME_SECSPERYEAR) {
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386 // Work forwards
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387
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388 if (cyg_libc_time_year_is_leap(1900 + __result->tm_year)) {
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389
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390 // But if this is a leap year, its possible that we are in the
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391 // middle of the last "extra" day
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392 if (_tim < CYGNUM_LIBC_TIME_SECSPERLEAPYEAR)
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393 break;
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394
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395 _tim -= CYGNUM_LIBC_TIME_SECSPERLEAPYEAR;
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396 __result->tm_wday += 366;
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397 } // if
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398 else {
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399 _tim -= CYGNUM_LIBC_TIME_SECSPERYEAR;
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400 __result->tm_wday += 365;
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401 }
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402 ++__result->tm_year;
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403 } // while
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404
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405 // Day of the year. We know _tim is +ve now
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406 CYG_ASSERT(_tim >= 0,
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407 "Number of seconds since start of year is negative!");
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408 __result->tm_yday = _tim / CYGNUM_LIBC_TIME_SECSPERDAY;
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409
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410 // Day of the week. Normalize to be 0..6, and note that it might
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411 // be negative, so we have to deal with the modulus being
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412 // implementation-defined for -ve numbers (ISO C 6.3.5)
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413 __result->tm_wday = (((__result->tm_wday + __result->tm_yday)%7)+7)%7;
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414
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415 // Month and Day of the month
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416
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417 _months_p = cyg_libc_time_month_lengths[
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418 cyg_libc_time_year_is_leap(1900 + __result->tm_year) ? 1 : 0 ];
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419
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420 __result->tm_mday = __result->tm_yday+1;
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421
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422 for (__result->tm_mon = 0;
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423 __result->tm_mday > _months_p[__result->tm_mon];
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424 ++__result->tm_mon) {
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425
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426 __result->tm_mday -= _months_p[__result->tm_mon];
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427
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428 } // for
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429
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430 _tim -= __result->tm_yday*CYGNUM_LIBC_TIME_SECSPERDAY;
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431
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432 // hours, mins secs
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433 __result->tm_hour = (int) (_tim / 3600);
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434 _tim %= 3600;
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435 __result->tm_min = (int) (_tim / 60);
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436 __result->tm_sec = (int) (_tim % 60);
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437
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438 __result->tm_isdst = 0; // gmtime always returns non-DST
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439
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440 CYG_REPORT_RETVAL(__result);
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441
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442 return __result;
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443 } // gmtime_r()
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444
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445 #endif // ifdef CYGIMP_LIBC_TIME_GMTIME_R_INLINE
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446
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447 ///////////////////////////////////
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448 // localtime_r() - POSIX.1 8.3.7 //
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449 ///////////////////////////////////
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450 //
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451 // This converts a time_t into a struct tm expressed in local time, and
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452 // stores the result in the space occupied by __result
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453 //
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454
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455 #ifdef CYGIMP_LIBC_TIME_LOCALTIME_R_INLINE
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456
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457 #include <cyg/libc/time/timeutil.h> // for cyg_libc_time_normalize_structtm()
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458
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459 CYGPRI_LIBC_TIME_LOCALTIME_R_INLINE struct tm *
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460 localtime_r( const time_t *__timer, struct tm *__result )
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461 {
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462 time_t __stdoffset, __dstoffset;
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463 CYG_REPORT_FUNCNAMETYPE("localtime_r", "returning %08x");
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464 CYG_CHECK_DATA_PTR(__timer, "__timer is not a valid pointer!");
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465 CYG_CHECK_DATA_PTR(__result, "__result is not a valid pointer!");
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466 CYG_REPORT_FUNCARG2("*__timer=%d, __result is at %08x",
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467 *__timer, __result);
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468
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469 gmtime_r(__timer, __result);
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470
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471 // Adjust for STD/DST
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472 __result->tm_isdst = cyg_libc_time_getzoneoffsets(&__stdoffset,
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473 &__dstoffset);
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474
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475 if (__result->tm_isdst == 0) { // STD
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476 __result->tm_sec += __stdoffset;
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477 cyg_libc_time_normalize_structtm( __result );
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478 } // if
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479 else if (__result->tm_isdst > 0) { // DST
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480 __result->tm_sec += __dstoffset;
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481 cyg_libc_time_normalize_structtm( __result );
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482 } // if
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483 // Don't do anything for tm_isdst == -1
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484
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485 CYG_REPORT_RETVAL(__result);
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486
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487 return __result;
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488 } // localtime_r()
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489
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490 #endif // ifdef CYGIMP_LIBC_TIME_LOCALTIME_R_INLINE
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491
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492
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493 ///////////////////////////////
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494 // ctime_r() - POSIX.1 8.3.5 //
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495 ///////////////////////////////
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496 //
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497 // This returns the equivalent of ctime() but writes to __buf
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498 // to store the returned string
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499 //
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500
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501 #ifdef CYGIMP_LIBC_TIME_CTIME_R_INLINE
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502
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503 CYGPRI_LIBC_TIME_CTIME_R_INLINE char *
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504 ctime_r( const time_t *__timer, char *__buf )
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505 {
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506 struct tm _mytm;
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507
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508 CYG_REPORT_FUNCNAMETYPE("ctime_r", "returning \"%s\"");
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509
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510 CYG_CHECK_DATA_PTR(__timer, "__timer is not a valid pointer!");
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511 CYG_CHECK_DATA_PTR(__buf, "__buf is not a valid pointer!");
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512
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513 CYG_REPORT_FUNCARG2("*__timer = %d, __buf=%08x", *__timer, __buf);
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514
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515 localtime_r( __timer, &_mytm );
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516
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517 asctime_r(&_mytm, __buf);
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518
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519 CYG_REPORT_RETVAL(__buf);
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520
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521 return __buf;
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522 } // ctime_r()
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523
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524 #endif // ifdef CYGIMP_LIBC_TIME_CTIME_R_INLINE
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525
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526
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527 //===========================================================================
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528 //
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529 // ISO C functions
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530
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531 // Time manipulation functions - ISO C 7.12.2
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532
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533 /////////////////////////////////
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534 // difftime() - ISO C 7.12.2.2 //
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535 /////////////////////////////////
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536 //
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537 // This returns (__time1 - __time0) in seconds
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538 //
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539
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540 #ifdef CYGIMP_LIBC_TIME_DIFFTIME_INLINE
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541
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542 CYGPRI_LIBC_TIME_DIFFTIME_INLINE double
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543 difftime( time_t __time1, time_t __time0 )
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544 {
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545 double _ret;
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546
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547 CYG_REPORT_FUNCNAMETYPE("difftime", "returning %f");
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548 CYG_REPORT_FUNCARG2("__time1=%d, __time0=%d", __time1, __time0);
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549
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550 _ret = (double)(__time1 - __time0);
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551
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552 CYG_REPORT_RETVAL(_ret);
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553
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554 return _ret;
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555 } // difftime()
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556
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557 #endif // ifdef CYGIMP_LIBC_TIME_DIFFTIME_INLINE
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558
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559 ///////////////////////////////
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560 // mktime() - ISO C 7.12.2.3 //
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561 ///////////////////////////////
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562 //
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563 // This converts a "struct tm" to a "time_t"
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564 //
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565
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566 #ifdef CYGIMP_LIBC_TIME_MKTIME_INLINE
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567
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568 #include <cyg/libc/time/timeutil.h> // for cyg_libc_time_normalize_structtm()
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569 // and cyg_libc_time_month_lengths
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570
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571 CYGPRI_LIBC_TIME_MKTIME_INLINE time_t
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572 mktime( struct tm *__timeptr )
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573 {
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574 time_t _ret;
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575 cyg_count16 _i;
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576 cyg_count32 _daycount;
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577 cyg_bool _leap;
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578
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579 CYG_REPORT_FUNCNAMETYPE("mktime", "returning %d");
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580 CYG_REPORT_FUNCARG1( "__timeptr is at address %08x", __timeptr);
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581
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582 CYG_CHECK_DATA_PTR(__timeptr, "__timeptr is not a valid pointer!");
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583
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584 // First deal with STD/DST. If tm_isdst==-1 (the "autodetect" value)
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585 // we assume its already in UTC. FIXME: is this correct behaviour? Hmm....
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586
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587 #if 0
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588 // FIXME: This doesn't seem to be the way to go
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589 if (__timeptr->tm_isdst == 0) { // STD
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590 // take _off_ the std offset to get us back to UTC from localtime
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591 __timeptr->tm_sec -= (int)cyg_libc_time_current_std_offset;
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592 } // if
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593 else if (__timeptr->tm_isdst > 0) { // DST
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594 // take _off_ the dst offset to get us back to UTC from localtime
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595 __timeptr->tm_sec -= (int)cyg_libc_time_current_dst_offset;
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596 } // if
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597 #endif
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598
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599 cyg_libc_time_normalize_structtm(__timeptr);
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600
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601 // check if a time_t can hold the year. FIXME: we assume it is
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602 // 32 bits which gives the year range 1902 - 2038
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603 if ( (__timeptr->tm_year <= 2) || (__timeptr->tm_year >= 138) ) {
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604 CYG_REPORT_RETVAL(-1);
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605 return (time_t)-1;
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606 }
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607
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608 // fill in the rest of the struct tm i.e. tm_wday and tm_yday
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609
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610 _leap = cyg_libc_time_year_is_leap(1900 + __timeptr->tm_year);
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611
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612 for (_i=0, _daycount=0; _i<12; ++_i) {
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613 if (_i == __timeptr->tm_mon) {
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614 _daycount += __timeptr->tm_mday - 1;
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615 break;
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616 } // if
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617 else {
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618 _daycount += cyg_libc_time_month_lengths[_leap][_i];
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619 } // else
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620 } // for
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621
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622 CYG_ASSERT(_i<12, "Reached end of year. __timeptr->tm_mon must be bad");
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623
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624 __timeptr->tm_yday = _daycount;
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625
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626 // now tm_wday
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627
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628 if (__timeptr->tm_year > 70) {
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629 for (_i=70; _i < __timeptr->tm_year; ++_i)
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630 _daycount += (cyg_libc_time_year_is_leap(1900 + _i) ? 366 : 365);
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631 } // if
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632 else if (__timeptr->tm_year < 70) {
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633 for (_i=70; _i > __timeptr->tm_year; --_i)
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634 _daycount -= (cyg_libc_time_year_is_leap(1900 + _i-1) ? 366 : 365);
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635 } // else if
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636
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637 __timeptr->tm_wday = (_daycount + CYGNUM_LIBC_TIME_EPOCH_WDAY) % 7;
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638
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639 // if _daycount was negative, on some targets the modulo operator will
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640 // return negative, so we adjust for that
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641
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642 if (__timeptr->tm_wday < 0)
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643 __timeptr->tm_wday += 7;
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644
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645 // now finally work out return value
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646
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647 _ret = __timeptr->tm_sec + 60*__timeptr->tm_min + 60*60*__timeptr->tm_hour;
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648 _ret += _daycount*24*60*60;
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649
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650 CYG_REPORT_RETVAL(_ret);
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651
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652 return _ret;
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653 } // mktime()
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654
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655 #endif // ifdef CYGIMP_LIBC_TIME_MKTIME_INLINE
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656
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657
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658 // Time conversion functions - ISO C 7.12.3
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659
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660 ////////////////////////////////
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661 // asctime() - ISO C 7.12.3.1 //
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662 ////////////////////////////////
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663 //
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664 // This returns a textual representation of a struct tm
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665 //
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666
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667 #ifdef CYGIMP_LIBC_TIME_ASCTIME_INLINE
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668
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669 extern char cyg_libc_time_asctime_buf[];
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670
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671 CYGPRI_LIBC_TIME_ASCTIME_INLINE char *
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672 asctime( const struct tm *__timeptr )
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673 {
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674 CYG_REPORT_FUNCNAMETYPE("__asctime", "returning \"%s\"");
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675 CYG_REPORT_FUNCARG1("__timeptr = %08x", __timeptr);
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676
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677 // paranoia
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678 CYG_CHECK_DATA_PTR(__timeptr, "__timeptr is not a valid pointer!");
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679
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680 (void)asctime_r( __timeptr, cyg_libc_time_asctime_buf );
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681
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682 CYG_REPORT_RETVAL(cyg_libc_time_asctime_buf);
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683
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684 return cyg_libc_time_asctime_buf;
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685 } // asctime()
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686
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687 #endif // ifdef CYGIMP_LIBC_TIME_ASCTIME_INLINE
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688
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689
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690 ///////////////////////////////
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691 // gmtime() - ISO C 7.12.3.3 //
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692 ///////////////////////////////
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693 //
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694 // This converts a time_t into a struct tm expressed in UTC
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695 //
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696
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697 #ifdef CYGIMP_LIBC_TIME_GMTIME_INLINE
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698
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699 extern struct tm cyg_libc_time_gmtime_buf;
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700
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701 CYGPRI_LIBC_TIME_GMTIME_INLINE struct tm *
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702 gmtime( const time_t *__timer )
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703 {
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704 CYG_REPORT_FUNCNAMETYPE("gmtime", "returning %08x");
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705 CYG_CHECK_DATA_PTR(__timer, "__timer is not a valid pointer!");
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706 CYG_REPORT_FUNCARG1("*__timer=%d", *__timer);
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707
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708 gmtime_r(__timer, &cyg_libc_time_gmtime_buf);
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709
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710 CYG_REPORT_RETVAL(&cyg_libc_time_gmtime_buf);
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711
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712 return &cyg_libc_time_gmtime_buf;
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713 } // gmtime()
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714
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715 #endif // ifdef CYGIMP_LIBC_TIME_GMTIME_INLINE
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716
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717
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718 //////////////////////////////////
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719 // localtime() - ISO C 7.12.3.4 //
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720 //////////////////////////////////
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721 //
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722 // This converts a time_t into a struct tm expressed in local time
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723 //
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724
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725 #ifdef CYGIMP_LIBC_TIME_LOCALTIME_INLINE
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726
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727 extern struct tm cyg_libc_time_localtime_buf;
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728
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729 CYGPRI_LIBC_TIME_LOCALTIME_INLINE struct tm *
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730 localtime( const time_t *__timer )
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731 {
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732 CYG_REPORT_FUNCNAMETYPE("localtime", "returning %08x");
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733 CYG_CHECK_DATA_PTR(__timer, "__timer is not a valid pointer!");
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734 CYG_REPORT_FUNCARG1("*__timer=%d", *__timer);
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735
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736 localtime_r(__timer, &cyg_libc_time_localtime_buf);
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737
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738 CYG_REPORT_RETVAL(&cyg_libc_time_localtime_buf);
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739
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740 return &cyg_libc_time_localtime_buf;
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741 } // localtime()
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742
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743 #endif // ifdef CYGIMP_LIBC_TIME_LOCALTIME_INLINE
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744
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745
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746 //////////////////////////////
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747 // ctime() - ISO C 7.12.3.2 //
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748 //////////////////////////////
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749 //
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750 // This returns asctime(localtime(__timeptr))
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751 //
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752
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753 #ifdef CYGIMP_LIBC_TIME_CTIME_INLINE
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754
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755 CYGPRI_LIBC_TIME_CTIME_INLINE char *
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756 ctime( const time_t *__timer )
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757 {
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758 char *_str;
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759
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760 CYG_REPORT_FUNCNAMETYPE("ctime", "returning \"%s\"");
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761 CYG_CHECK_DATA_PTR( __timer, "__timer is not a valid pointer!");
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762 CYG_REPORT_FUNCARG1("*__timer = %d", *__timer);
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763
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764 _str = asctime(localtime(__timer));
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765
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766 CYG_REPORT_RETVAL(_str);
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767
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768 return _str;
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769 } // ctime()
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770
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771 #endif // ifdef CYGIMP_LIBC_TIME_CTIME_INLINE
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772
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773
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774 #ifdef __cplusplus
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775 } // extern "C"
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776 #endif
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777
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778 #endif // CYGONCE_LIBC_TIME_INL multiple inclusion protection
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779
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780 // EOF time.inl