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