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1 /* |
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2 |
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3 Copyright (C) 1999, 2000, 2002, 2005, 2006, 2007 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 #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 <climits> |
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28 #include <ctime> |
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29 |
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30 #ifdef HAVE_UNISTD_H |
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31 #ifdef HAVE_SYS_TYPES_H |
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32 #include <sys/types.h> |
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33 #endif |
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34 #include <unistd.h> |
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35 #endif |
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36 |
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37 #if defined (OCTAVE_USE_WINDOWS_API) |
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38 #include <windows.h> |
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39 #undef min |
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40 #undef max |
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41 #endif |
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42 |
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43 #include "lo-error.h" |
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44 #include "lo-math.h" |
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45 #include "lo-utils.h" |
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46 #include "oct-time.h" |
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47 |
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48 #ifndef HAVE_STRFTIME |
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49 // Override any previous definition and use local version. |
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50 extern "C" size_t |
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51 strftime (char *s, size_t maxsize, const char *format, const struct tm *tp); |
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52 #endif |
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53 |
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54 octave_time::octave_time (const octave_base_tm& tm) |
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55 { |
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56 struct tm t; |
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57 |
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58 t.tm_sec = tm.sec (); |
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59 t.tm_min = tm.min (); |
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60 t.tm_hour = tm.hour (); |
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61 t.tm_mday = tm.mday (); |
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62 t.tm_mon = tm.mon (); |
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63 t.tm_year = tm.year (); |
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64 t.tm_wday = tm.wday (); |
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65 t.tm_yday = tm.yday (); |
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66 t.tm_isdst = tm.isdst (); |
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67 |
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68 #if defined (HAVE_STRUCT_TM_TM_ZONE) |
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69 std::string s = tm.zone (); |
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70 char *ps = strsave (s.c_str ()); |
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71 t.tm_zone = ps; |
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72 #endif |
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73 |
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74 ot_unix_time = mktime (&t); |
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75 |
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76 #if defined (HAVE_STRUCT_TM_TM_ZONE) |
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77 delete [] ps; |
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78 #endif |
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79 |
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80 ot_usec = tm.usec (); |
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81 } |
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82 |
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83 std::string |
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84 octave_time::ctime (void) const |
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85 { |
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86 return octave_localtime (*this) . asctime (); |
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87 } |
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88 |
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89 void |
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90 octave_time::stamp (void) |
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91 { |
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92 #if defined (HAVE_GETTIMEOFDAY) |
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93 |
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94 struct timeval tp; |
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95 |
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96 #if defined (GETTIMEOFDAY_NO_TZ) |
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97 gettimeofday (&tp); |
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98 #else |
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99 gettimeofday (&tp, 0); |
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100 #endif |
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101 |
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102 ot_unix_time = tp.tv_sec; |
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103 ot_usec = tp.tv_usec; |
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104 |
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105 #elif defined (OCTAVE_USE_WINDOWS_API) |
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106 |
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107 // Loosely based on the code from Cygwin |
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108 // Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. |
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109 // Licenced under the GPL. |
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110 |
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111 const LONGLONG TIME_OFFSET = 0x19db1ded53e8000LL; |
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112 |
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113 static int init = 1; |
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114 static LARGE_INTEGER base; |
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115 static LARGE_INTEGER t0; |
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116 static double dt; |
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117 |
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118 if (init) |
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119 { |
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120 LARGE_INTEGER ifreq; |
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121 |
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122 if (QueryPerformanceFrequency (&ifreq)) |
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123 { |
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124 // Get clock frequency |
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125 dt = (double) 1000000.0 / (double) ifreq.QuadPart; |
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126 |
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127 // Get base time as microseconds from Jan 1. 1970 |
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128 int priority = GetThreadPriority (GetCurrentThread ()); |
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129 SetThreadPriority (GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL); |
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130 if (QueryPerformanceCounter (&base)) |
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131 { |
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132 FILETIME f; |
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133 |
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134 GetSystemTimeAsFileTime (&f); |
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135 |
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136 t0.HighPart = f.dwHighDateTime; |
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137 t0.LowPart = f.dwLowDateTime; |
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138 t0.QuadPart -= TIME_OFFSET; |
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139 t0.QuadPart /= 10; |
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140 |
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141 init = 0; |
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142 } |
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143 |
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144 SetThreadPriority (GetCurrentThread (), priority); |
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145 } |
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146 |
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147 if (! init) |
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148 { |
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149 ot_unix_time = time (0); |
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150 ot_usec = 0; |
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151 |
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152 return; |
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153 } |
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154 } |
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155 |
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156 LARGE_INTEGER now; |
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157 |
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158 if (QueryPerformanceCounter (&now)) |
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159 { |
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160 now.QuadPart = (LONGLONG) (dt * (double)(now.QuadPart - base.QuadPart)); |
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161 now.QuadPart += t0.QuadPart; |
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162 |
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163 ot_unix_time = now.QuadPart / 1000000LL; |
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164 ot_usec = now.QuadPart % 1000000LL; |
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165 } |
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166 else |
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167 { |
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168 ot_unix_time = time (0); |
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169 ot_usec = 0; |
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170 } |
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171 |
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172 #else |
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173 |
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174 ot_unix_time = time (0); |
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175 |
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176 #endif |
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177 } |
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178 |
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179 // From the mktime() manual page: |
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180 // |
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181 // The mktime() function converts a broken-down time structure, |
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182 // expressed as local time, to calendar time representation. |
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183 // |
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184 // <snip> |
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185 // |
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186 // If structure members are outside their legal interval, they |
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187 // will be normalized (so that, e.g., 40 October is changed into |
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188 // 9 November). |
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189 // |
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190 // So, we no longer check limits here. |
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191 |
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192 #if 0 |
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193 #define DEFINE_SET_INT_FIELD_FCN(f, lo, hi) \ |
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194 octave_base_tm& \ |
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195 octave_base_tm::f (int v) \ |
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196 { \ |
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197 if (v < lo || v > hi) \ |
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198 (*current_liboctave_error_handler) \ |
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199 ("invalid value specified for " #f); \ |
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200 \ |
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201 tm_ ## f = v; \ |
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202 \ |
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203 return *this; \ |
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204 } |
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205 #else |
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206 #define DEFINE_SET_INT_FIELD_FCN(f, lo, hi) \ |
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207 octave_base_tm& \ |
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208 octave_base_tm::f (int v) \ |
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209 { \ |
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210 tm_ ## f = v; \ |
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211 \ |
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212 return *this; \ |
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213 } |
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214 #endif |
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215 |
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216 DEFINE_SET_INT_FIELD_FCN (usec, 0, 1000000) |
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217 DEFINE_SET_INT_FIELD_FCN (sec, 0, 61) |
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218 DEFINE_SET_INT_FIELD_FCN (min, 0, 59) |
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219 DEFINE_SET_INT_FIELD_FCN (hour, 0, 23) |
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220 DEFINE_SET_INT_FIELD_FCN (mday, 1, 31) |
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221 DEFINE_SET_INT_FIELD_FCN (mon, 0, 11) |
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222 DEFINE_SET_INT_FIELD_FCN (year, INT_MIN, INT_MAX) |
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223 DEFINE_SET_INT_FIELD_FCN (wday, 0, 6) |
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224 DEFINE_SET_INT_FIELD_FCN (yday, 0, 365) |
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225 DEFINE_SET_INT_FIELD_FCN (isdst, 0, 1) |
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226 |
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227 octave_base_tm& |
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228 octave_base_tm::zone (const std::string& s) |
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229 { |
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230 tm_zone = s; |
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231 return *this; |
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232 } |
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233 |
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234 #if !defined STRFTIME_BUF_INITIAL_SIZE |
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235 #define STRFTIME_BUF_INITIAL_SIZE 128 |
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236 #endif |
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237 |
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238 std::string |
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239 octave_base_tm::strftime (const std::string& fmt) const |
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240 { |
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241 std::string retval; |
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242 |
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243 if (! fmt.empty ()) |
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244 { |
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245 struct tm t; |
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246 |
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247 t.tm_sec = tm_sec; |
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248 t.tm_min = tm_min; |
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249 t.tm_hour = tm_hour; |
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250 t.tm_mday = tm_mday; |
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251 t.tm_mon = tm_mon; |
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252 t.tm_year = tm_year; |
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253 t.tm_wday = tm_wday; |
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254 t.tm_yday = tm_yday; |
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255 t.tm_isdst = tm_isdst; |
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256 |
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257 #if defined (HAVE_STRUCT_TM_TM_ZONE) |
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258 char *ps = strsave (tm_zone.c_str ()); |
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259 t.tm_zone = ps; |
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260 #endif |
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261 |
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262 const char *fmt_str = fmt.c_str (); |
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263 |
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264 char *buf = 0; |
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265 size_t bufsize = STRFTIME_BUF_INITIAL_SIZE; |
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266 size_t chars_written = 0; |
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267 |
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268 while (chars_written == 0) |
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269 { |
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270 delete [] buf; |
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271 buf = new char[bufsize]; |
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272 buf[0] = '\0'; |
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273 |
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274 chars_written = ::strftime (buf, bufsize, fmt_str, &t); |
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275 |
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276 bufsize *= 2; |
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277 } |
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278 |
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279 #if defined (HAVE_STRUCT_TM_TM_ZONE) |
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280 delete [] ps; |
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281 #endif |
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282 |
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283 retval = buf; |
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284 |
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285 delete [] buf; |
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286 } |
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287 |
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288 return retval; |
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289 } |
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290 |
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291 void |
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292 octave_base_tm::init (void *p) |
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293 { |
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294 if (! p) |
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295 return; |
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296 |
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297 struct tm *t = static_cast<struct tm*> (p); |
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298 |
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299 tm_sec = t->tm_sec; |
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300 tm_min = t->tm_min; |
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301 tm_hour = t->tm_hour; |
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302 tm_mday = t->tm_mday; |
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303 tm_mon = t->tm_mon; |
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304 tm_year = t->tm_year; |
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305 tm_wday = t->tm_wday; |
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306 tm_yday = t->tm_yday; |
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307 tm_isdst = t->tm_isdst; |
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308 |
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309 #if defined (HAVE_STRUCT_TM_TM_ZONE) |
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310 if (t->tm_zone) |
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311 tm_zone = t->tm_zone; |
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312 #elif defined (HAVE_TZNAME) |
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313 if (t->tm_isdst == 0 || t->tm_isdst == 1) |
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314 tm_zone = tzname[t->tm_isdst]; |
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315 #endif |
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316 } |
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317 |
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318 void |
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319 octave_localtime::init (const octave_time& ot) |
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320 { |
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321 tm_usec = ot.usec (); |
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322 |
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323 time_t t = ot.unix_time (); |
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324 |
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325 octave_base_tm::init (localtime (&t)); |
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326 } |
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327 |
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328 void |
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329 octave_gmtime::init (const octave_time& ot) |
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330 { |
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331 tm_usec = ot.usec (); |
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332 |
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333 time_t t = ot.unix_time (); |
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334 |
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335 octave_base_tm::init (gmtime (&t)); |
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336 } |
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337 |
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338 void |
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339 octave_strptime::init (const std::string& str, const std::string& fmt) |
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340 { |
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341 struct tm t; |
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342 |
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343 t.tm_sec = 0; |
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344 t.tm_min = 0; |
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345 t.tm_hour = 0; |
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346 t.tm_mday = 0; |
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347 t.tm_mon = -1; |
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348 t.tm_year = INT_MIN; |
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349 t.tm_wday = 0; |
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350 t.tm_yday = 0; |
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351 t.tm_isdst = 0; |
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352 |
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353 #if defined (HAVE_STRUCT_TM_TM_ZONE) |
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354 char *ps = strsave (""); |
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355 t.tm_zone = ps; |
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356 #endif |
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357 |
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358 char *p = strsave (str.c_str ()); |
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359 |
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360 char *q = oct_strptime (p, fmt.c_str (), &t); |
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361 |
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362 // Fill in wday and yday, but only if mday is valid and the mon and year |
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363 // are filled in, avoiding issues with mktime and invalid dates. |
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364 if (t.tm_mday != 0 && t.tm_mon >= 0 && t.tm_year != INT_MIN) |
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365 { |
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366 t.tm_isdst = -1; |
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367 mktime (&t); |
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368 } |
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369 |
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370 if (t.tm_mon < 0) |
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371 t.tm_mon = 0; |
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372 |
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373 if (t.tm_year == INT_MIN) |
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374 t.tm_year = 0; |
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375 |
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376 if (q) |
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377 nchars = q - p + 1; |
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378 else |
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379 nchars = 0; |
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380 |
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381 delete [] p; |
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382 |
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383 octave_base_tm::init (&t); |
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384 |
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385 #if defined (HAVE_STRUCT_TM_TM_ZONE) |
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386 delete [] ps; |
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387 #endif |
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388 } |
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389 |
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390 /* |
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391 ;;; Local Variables: *** |
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392 ;;; mode: C++ *** |
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393 ;;; End: *** |
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394 */ |
