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annotate liboctave/system/oct-time.cc @ 21751:b571fc85953f

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maint: Use two spaces after period to indicate sentence break.
author Rik <rik@octave.org>
date Thu, 19 May 2016 18:48:52 -0700
parents 11af9c03400c
children 25493c55d976
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1 /*
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2
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3 Copyright (C) 1999-2015 John W. Eaton
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #if defined (HAVE_CONFIG_H)
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24 # include "config.h"
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25 #endif
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26
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27 #include <limits>
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28
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29 #include <ctime>
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30
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31 #include <sys/time.h>
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32 #include <sys/types.h>
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33 #include <unistd.h>
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34
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35 #include "strftime.h"
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36
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37 #include "lo-error.h"
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38 #include "lo-math.h"
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39 #include "lo-utils.h"
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40 #include "oct-locbuf.h"
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41 #include "oct-time.h"
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42
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43 namespace octave
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44 {
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45 namespace sys
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46 {
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47 time::time (double d)
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48 : ot_unix_time (static_cast<time_t> (d)), ot_usec (0)
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49 {
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50 double ip;
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51 ot_usec = static_cast<int> (std::modf (d, &ip) * 1e6);
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52 }
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53
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54 time::time (const base_tm& tm)
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55 : ot_unix_time (), ot_usec ()
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56 {
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57 struct ::tm t;
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58
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59 t.tm_sec = tm.sec ();
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60 t.tm_min = tm.min ();
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61 t.tm_hour = tm.hour ();
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62 t.tm_mday = tm.mday ();
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63 t.tm_mon = tm.mon ();
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64 t.tm_year = tm.year ();
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65 t.tm_wday = tm.wday ();
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66 t.tm_yday = tm.yday ();
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67 t.tm_isdst = tm.isdst ();
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68
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69 #if defined (HAVE_TM_GMTOFF)
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70 t.tm_gmtoff = tm.gmtoff ();
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71 #endif
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72
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73 #if defined (HAVE_STRUCT_TM_TM_ZONE)
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74 std::string s = tm.zone ();
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75 char *ps = strsave (s.c_str ());
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76 t.tm_zone = ps;
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77 #endif
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78
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79 ot_unix_time = gnulib::mktime (&t);
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80
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81 #if defined (HAVE_STRUCT_TM_TM_ZONE)
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82 delete [] ps;
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83 #endif
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84
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85 ot_usec = tm.usec ();
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86 }
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87
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88 std::string
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89 time::ctime (void) const
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90 {
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91 return localtime (*this).asctime ();
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92 }
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93
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94 void
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95 time::stamp (void)
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96 {
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97 struct ::timeval tp;
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98
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99 gnulib::gettimeofday (&tp, 0);
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100
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101 ot_unix_time = tp.tv_sec;
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102 ot_usec = tp.tv_usec;
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103 }
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104
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105 // From the mktime() manual page:
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106 //
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107 // The mktime() function converts a broken-down time structure,
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108 // expressed as local time, to calendar time representation.
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109 //
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110 // <snip>
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111 //
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112 // If structure members are outside their legal interval, they
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113 // will be normalized (so that, e.g., 40 October is changed into
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114 // 9 November).
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115 //
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116 // So, we no longer check limits here.
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117
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118 #define DEFINE_SET_FIELD_FCN(type, f, lo, hi) \
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119 base_tm& \
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120 base_tm::f (type v) \
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121 { \
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122 m_ ## f = v; \
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123 \
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124 return *this; \
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125 }
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126
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127 #define DEFINE_SET_INT_FIELD_FCN(f, lo, hi) \
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128 DEFINE_SET_FIELD_FCN (int, f, lo, hi)
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129
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130 DEFINE_SET_INT_FIELD_FCN (usec, 0, 1000000)
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131 DEFINE_SET_INT_FIELD_FCN (sec, 0, 61)
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132 DEFINE_SET_INT_FIELD_FCN (min, 0, 59)
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133 DEFINE_SET_INT_FIELD_FCN (hour, 0, 23)
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134 DEFINE_SET_INT_FIELD_FCN (mday, 1, 31)
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135 DEFINE_SET_INT_FIELD_FCN (mon, 0, 11)
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136 DEFINE_SET_INT_FIELD_FCN (year, std::numeric_limits<int>::min (),
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137 std::numeric_limitd<int>::max ())
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138 DEFINE_SET_INT_FIELD_FCN (wday, 0, 6)
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139 DEFINE_SET_INT_FIELD_FCN (yday, 0, 365)
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140 DEFINE_SET_INT_FIELD_FCN (isdst, 0, 1)
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141 DEFINE_SET_FIELD_FCN (long, gmtoff, -86400, 0)
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142
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143 base_tm&
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144 base_tm::zone (const std::string& s)
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145 {
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146 m_zone = s;
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147 return *this;
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148 }
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149
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150 #if ! defined STRFTIME_BUF_INITIAL_SIZE
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151 # define STRFTIME_BUF_INITIAL_SIZE 128
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152 #endif
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153
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154 std::string
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155 base_tm::strftime (const std::string& fmt) const
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156 {
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157 std::string retval;
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158
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159 if (! fmt.empty ())
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160 {
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161 struct ::tm t;
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162
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163 t.tm_sec = m_sec;
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164 t.tm_min = m_min;
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165 t.tm_hour = m_hour;
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166 t.tm_mday = m_mday;
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167 t.tm_mon = m_mon;
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168 t.tm_year = m_year;
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169 t.tm_wday = m_wday;
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170 t.tm_yday = m_yday;
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171 t.tm_isdst = m_isdst;
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172
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173 #if defined (HAVE_TM_GMTOFF)
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174 t.tm_gmtoff = m_gmtoff;
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175 #endif
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176
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177 #if defined (HAVE_STRUCT_TM_TM_ZONE)
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178 char *ps = strsave (m_zone.c_str ());
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179 t.tm_zone = ps;
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180 #endif
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181
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182 const char *fmt_str = fmt.c_str ();
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183
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184 char *buf = 0;
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185 size_t bufsize = STRFTIME_BUF_INITIAL_SIZE;
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186 size_t chars_written = 0;
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187
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188 while (chars_written == 0)
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189 {
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190 delete [] buf;
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191 buf = new char [bufsize];
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192 buf[0] = '\0';
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193
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194 chars_written = nstrftime (buf, bufsize, fmt_str, &t, 0, 0);
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195
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196 bufsize *= 2;
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197 }
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198
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199 #if defined (HAVE_STRUCT_TM_TM_ZONE)
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200 delete [] ps;
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201 #endif
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202
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203 retval = buf;
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204
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205 delete [] buf;
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206 }
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207
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208 return retval;
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209 }
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210
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211 void
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212 base_tm::init (void *p)
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213 {
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214 if (! p)
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215 return;
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216
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217 struct ::tm *t = static_cast<struct ::tm*> (p);
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218
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219 m_sec = t->tm_sec;
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220 m_min = t->tm_min;
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221 m_hour = t->tm_hour;
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222 m_mday = t->tm_mday;
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223 m_mon = t->tm_mon;
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224 m_year = t->tm_year;
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225 m_wday = t->tm_wday;
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226 m_yday = t->tm_yday;
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227 m_isdst = t->tm_isdst;
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228
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229 #if defined (HAVE_TM_GMTOFF)
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230 m_gmtoff = t->tm_gmtoff;
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231 #endif
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232
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233 #if defined (HAVE_STRUCT_TM_TM_ZONE)
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234 if (t->tm_zone)
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235 m_zone = t->tm_zone;
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236 #elif defined (HAVE_TZNAME)
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237 if (t->tm_isdst == 0 || t->tm_isdst == 1)
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238 m_zone = tzname[t->tm_isdst];
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239 #endif
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240 }
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241
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242 void
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243 localtime::init (const time& ot)
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244 {
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245 m_usec = ot.usec ();
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246
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247 time_t t = ot.unix_time ();
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248
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249 base_tm::init (gnulib::localtime (&t));
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250 }
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251
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252 void
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253 gmtime::init (const time& ot)
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254 {
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255 m_usec = ot.usec ();
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256
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257 time_t t = ot.unix_time ();
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258
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259 base_tm::init (gnulib::gmtime (&t));
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260 }
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261
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262 void
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263 strptime::init (const std::string& str, const std::string& fmt)
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264 {
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265 struct ::tm t;
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266
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267 t.tm_sec = 0;
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268 t.tm_min = 0;
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269 t.tm_hour = 0;
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270 t.tm_mday = 0;
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271 t.tm_mon = -1;
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272 t.tm_year = std::numeric_limits<int>::min ();
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273 t.tm_wday = 0;
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274 t.tm_yday = 0;
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275 t.tm_isdst = 0;
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276
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277 #if defined (HAVE_TM_GMTOFF)
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278 t.tm_gmtoff = 0;
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279 #endif
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280
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281 #if defined (HAVE_STRUCT_TM_TM_ZONE)
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282 char *ps = strsave ("");
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283 t.tm_zone = ps;
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284 #endif
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285
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286 const char *p = str.c_str ();
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287
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288 char *q = gnulib::strptime (p, fmt.c_str (), &t);
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289
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290 // Fill in wday and yday, but only if mday is valid and the mon and year
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291 // are filled in, avoiding issues with mktime and invalid dates.
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292 if (t.tm_mday != 0 && t.tm_mon >= 0
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293 && t.tm_year != std::numeric_limits<int>::min ())
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294 {
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295 t.tm_isdst = -1;
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296 gnulib::mktime (&t);
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297 }
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298
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299 if (t.tm_mon < 0)
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300 t.tm_mon = 0;
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301
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302 if (t.tm_year == std::numeric_limits<int>::min ())
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303 t.tm_year = 0;
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304
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305 if (q)
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306 nchars = q - p + 1;
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307 else
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308 nchars = 0;
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309
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310 base_tm::init (&t);
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311
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312 #if defined (HAVE_STRUCT_TM_TM_ZONE)
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313 delete [] ps;
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314 #endif
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315 }
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316 }
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317 }