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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 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 2, or (at your option) any |
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10 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, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #ifdef 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 <string> |
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28 |
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29 #include<iostream.h> |
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30 |
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31 #include "defun-dld.h" |
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32 #include "error.h" |
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33 #include "oct-map.h" |
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34 #include "systime.h" |
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35 #include "ov.h" |
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36 #include "oct-obj.h" |
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37 #include "utils.h" |
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38 |
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39 // Date and time functions. |
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40 |
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41 static Octave_map |
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42 mk_tm_map (struct tm *tm, double fraction) |
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43 { |
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44 Octave_map m; |
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45 |
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46 m ["usec"] = fraction * 1e6; |
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47 m ["sec"] = static_cast<double> (tm->tm_sec); |
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48 m ["min"] = static_cast<double> (tm->tm_min); |
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49 m ["hour"] = static_cast<double> (tm->tm_hour); |
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50 m ["mday"] = static_cast<double> (tm->tm_mday); |
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51 m ["mon"] = static_cast<double> (tm->tm_mon); |
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52 m ["year"] = static_cast<double> (tm->tm_year); |
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53 m ["wday"] = static_cast<double> (tm->tm_wday); |
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54 m ["yday"] = static_cast<double> (tm->tm_yday); |
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55 m ["isdst"] = static_cast<double> (tm->tm_isdst); |
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56 |
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57 #if defined (HAVE_TM_ZONE) |
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58 m ["zone"] = tm->tm_zone; |
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59 #elif defined (HAVE_TZNAME) |
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60 if (tm->tm_isdst == 0 || tm->tm_isdst == 1) |
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61 m ["zone"] = tzname[tm->tm_isdst]; |
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62 #endif |
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63 |
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64 return m; |
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65 } |
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66 |
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67 static struct tm* |
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68 extract_tm (Octave_map &m, double& fraction) |
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69 { |
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70 static struct tm tm; |
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71 |
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72 fraction = (m ["usec"] . double_value ()) / 1e6; |
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73 tm.tm_sec = static_cast<int> (m ["sec"] . double_value ()); |
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74 tm.tm_min = static_cast<int> (m ["min"] . double_value ()); |
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75 tm.tm_hour = static_cast<int> (m ["hour"] . double_value ()); |
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76 tm.tm_mday = static_cast<int> (m ["mday"] . double_value ()); |
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77 tm.tm_mon = static_cast<int> (m ["mon"] . double_value ()); |
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78 tm.tm_year = static_cast<int> (m ["year"] . double_value ()); |
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79 tm.tm_wday = static_cast<int> (m ["wday"] . double_value ()); |
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80 tm.tm_yday = static_cast<int> (m ["yday"] . double_value ()); |
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81 tm.tm_isdst = static_cast<int> (m ["isdst"] . double_value ()); |
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82 |
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83 #if defined (HAVE_TM_ZONE) |
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84 static char *tm_zone = 0; |
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85 |
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86 string tstr = m ["zone"] . string_value (); |
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87 |
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88 delete [] tm_zone; |
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89 tm_zone = strsave (tstr.c_str ()); |
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90 |
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91 tm.tm_zone = tm_zone; |
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92 #endif |
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93 |
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94 return &tm; |
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95 } |
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96 |
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97 DEFUN_DLD (time, , , |
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98 "time ()\n\ |
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99 \n\ |
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100 Return current time. On Unix systems, this is the number of\n\ |
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101 seconds since the epoch.") |
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102 { |
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103 time_t now; |
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104 double fraction = 0.0; |
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105 |
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106 #if defined (HAVE_GETTIMEOFDAY) |
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107 |
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108 struct timeval tp; |
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109 |
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110 #if defined (GETTIMEOFDAY_NO_TZ) |
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111 gettimeofday (&tp); |
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112 #else |
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113 gettimeofday (&tp, 0); |
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114 #endif |
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115 |
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116 now = tp.tv_sec; |
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117 |
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118 fraction = tp.tv_usec / 1e6; |
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119 |
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120 #else |
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121 |
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122 now = time (0); |
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123 |
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124 #endif |
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125 |
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126 return static_cast<double> (now) + fraction; |
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127 } |
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128 |
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129 DEFUN_DLD (gmtime, args, , |
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130 "gmtime (TIME)\n\ |
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131 \n\ |
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132 Given a value returned from time(), return a structure like that\n\ |
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133 returned from localtime() but with values corresponding to\n\ |
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134 Coordinated Universal Time (UTC).") |
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135 { |
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136 octave_value_list retval; |
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137 |
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138 if (args.length () == 1) |
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139 { |
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140 double tmp = args(0).double_value (); |
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141 |
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142 if (! error_state) |
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143 { |
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144 time_t timeval = static_cast<int> (tmp); |
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145 double ip; |
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146 double fraction = modf (tmp, &ip); |
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147 |
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148 retval = octave_value (mk_tm_map (gmtime (&timeval), fraction)); |
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149 } |
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150 } |
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151 else |
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152 print_usage ("gmtime"); |
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153 |
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154 return retval; |
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155 } |
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156 |
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157 DEFUN_DLD (localtime, args, , |
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158 "localtime (TIME)\n\ |
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159 \n\ |
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160 Given a value returned from time(), return a structure with\n\ |
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161 the following elements:\n\ |
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162 \n\ |
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163 usec : microseconds after the second (0, 999999)\n\ |
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164 sec : seconds after the minute (0, 61)\n\ |
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165 min : minutes after the hour (0, 59)\n\ |
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166 hour : hours since midnight (0, 23)\n\ |
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167 mday : day of the month (1, 31)\n\ |
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168 mon : months since January (0, 11)\n\ |
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169 year : years since 1900\n\ |
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170 wday : days since Sunday (0, 6)\n\ |
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171 yday : days since January 1 (0, 365)\n\ |
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172 isdst : Daylight Savings Time flag\n\ |
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173 zone : Time zone") |
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174 { |
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175 octave_value_list retval; |
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176 |
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177 if (args.length () == 1) |
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178 { |
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179 double tmp = args(0).double_value (); |
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180 |
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181 if (! error_state) |
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182 { |
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183 time_t timeval = static_cast<int> (tmp); |
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184 double ip; |
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185 double fraction = modf (tmp, &ip); |
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186 |
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187 retval = octave_value (mk_tm_map (localtime (&timeval), fraction)); |
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188 } |
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189 } |
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190 else |
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191 print_usage ("localtime"); |
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192 |
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193 return retval; |
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194 } |
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195 |
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196 DEFUN_DLD (mktime, args, , |
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197 "mktime (TMSTRUCT)") |
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198 { |
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199 octave_value_list retval; |
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200 |
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201 if (args.length () == 1 && args(0).is_map ()) |
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202 { |
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203 Octave_map map = args(0).map_value (); |
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204 |
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205 double fraction; |
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206 |
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207 struct tm *tm = extract_tm (map, fraction); |
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208 |
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209 if (! error_state) |
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210 retval = static_cast<double> (mktime (tm)) + fraction; |
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211 } |
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212 else |
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213 print_usage ("mktime"); |
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214 |
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215 return retval; |
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216 } |
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217 |
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218 #if !defined STRFTIME_BUF_INITIAL_SIZE |
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219 #define STRFTIME_BUF_INITIAL_SIZE 128 |
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220 #endif |
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221 |
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222 DEFUN_DLD (strftime, args, , |
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223 "strftime (FMT, TMSTRUCT)\n\ |
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224 \n\ |
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225 Performs `%' substitutions similar to those in printf. Except where\n\ |
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226 noted, substituted fields have a fixed size; numeric fields are\n\ |
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227 padded if necessary. Padding is with zeros by default; for fields\n\ |
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228 that display a single number, padding can be changed or inhibited by\n\ |
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229 following the `%' with one of the modifiers described below.\n\ |
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230 Unknown field specifiers are copied as normal characters. All other\n\ |
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231 characters are copied to the output without change.\n\ |
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232 \n\ |
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233 Supports a superset of the ANSI C field specifiers.\n\ |
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234 \n\ |
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235 Literal character fields:\n\ |
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236 \n\ |
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237 % %\n\ |
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238 n newline\n\ |
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239 t tab\n\ |
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240 \n\ |
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241 Numeric modifiers (a nonstandard extension):\n\ |
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242 \n\ |
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243 - do not pad the field\n\ |
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244 _ pad the field with spaces\n\ |
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245 \n\ |
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246 Time fields:\n\ |
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247 \n\ |
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248 %H hour (00..23)\n\ |
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249 %I hour (01..12)\n\ |
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250 %k hour ( 0..23)\n\ |
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251 %l hour ( 1..12)\n\ |
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252 %M minute (00..59)\n\ |
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253 %p locale's AM or PM\n\ |
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254 %r time, 12-hour (hh:mm:ss [AP]M)\n\ |
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255 %R time, 24-hour (hh:mm)\n\ |
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256 %s time in seconds since 00:00:00, Jan 1, 1970 (a nonstandard extension)\n\ |
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257 %S second (00..61)\n\ |
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258 %T time, 24-hour (hh:mm:ss)\n\ |
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259 %X locale's time representation (%H:%M:%S)\n\ |
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260 %Z time zone (EDT), or nothing if no time zone is determinable\n\ |
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261 %z offset from GMT\n\ |
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262 \n\ |
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263 Date fields:\n\ |
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264 \n\ |
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265 %a locale's abbreviated weekday name (Sun..Sat)\n\ |
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266 %A locale's full weekday name, variable length (Sunday..Saturday)\n\ |
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267 %b locale's abbreviated month name (Jan..Dec)\n\ |
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268 %B locale's full month name, variable length (January..December)\n\ |
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269 %c locale's date and time (Sat Nov 04 12:02:33 EST 1989)\n\ |
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270 %C century (00..99)\n\ |
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271 %d day of month (01..31)\n\ |
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272 %e day of month ( 1..31)\n\ |
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273 %D date (mm/dd/yy)\n\ |
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274 %h same as %b\n\ |
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275 %j day of year (001..366)\n\ |
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276 %m month (01..12)\n\ |
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277 %U week number of year with Sunday as first day of week (00..53)\n\ |
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278 %w day of week (0..6)\n\ |
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279 %W week number of year with Monday as first day of week (00..53)\n\ |
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280 %x locale's date representation (mm/dd/yy)\n\ |
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281 %y last two digits of year (00..99)\n\ |
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282 %Y year (1970...)") |
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283 { |
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284 octave_value_list retval; |
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285 |
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286 if (args.length () == 2 && args(0).is_string () && args(1).is_map ()) |
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287 { |
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288 string fmt = args(0).string_value (); |
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289 |
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290 Octave_map map = args(1).map_value (); |
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291 |
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292 double fraction; |
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293 |
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294 struct tm *tm = extract_tm (map, fraction); |
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295 |
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296 if (! error_state) |
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297 { |
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298 const char *fmt_str = fmt.c_str (); |
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299 |
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300 char *buf = 0; |
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301 size_t bufsize = STRFTIME_BUF_INITIAL_SIZE; |
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302 size_t chars_written = 0; |
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303 |
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304 while (chars_written == 0) |
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305 { |
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306 delete [] buf; |
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307 buf = new char[bufsize]; |
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308 buf[0] = '\0'; |
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309 |
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310 chars_written = strftime (buf, bufsize, fmt_str, tm); |
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311 |
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312 bufsize *= 2; |
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313 } |
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314 |
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315 retval = buf; |
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316 |
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317 delete [] buf; |
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318 } |
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319 } |
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320 else |
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321 print_usage ("strftime"); |
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322 |
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323 return retval; |
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324 } |
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325 |
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326 /* |
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327 ;;; Local Variables: *** |
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328 ;;; mode: C++ *** |
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329 ;;; End: *** |
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330 */ |
