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46
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1 //Note that the following code does not currently take into account leap seconds
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2
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3 Days From Secs[secs:days,secs left]
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4 {
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5 secs per day <- [[60]*[60]]*[24]
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6 days <- [secs]/[secs per day]
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7 secs left <- [secs]%[secs per day]
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8 }
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9
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10 //This doesn't take into account the mod 100 rule
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11 Year From Unix Days[days:year,day in year]
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12 {
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13 block days <- [[365]*[4]]+[1]
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14 base year <- [1970]+[[[days]/[block days]]*[4]]
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15 after base <- [days]%[block days]
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16 If[[after base] > [365]]
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17 {
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18 year <- [[base year]+[1]]+[ [[after base]-[366]]/[365] ]
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19 day in year <- [[after base]-[366]]%[365]
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20 }{
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21 year <- Val[base year]
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22 day in year <- Val[after base]
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23 }
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24 }
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25
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26 Is Leap Year[year:is,is not]
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27 {
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28 is <-If[[[year]%[400]]=[0]] {}
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29 {
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30 ,is not <- If[[[year]%[100]]=[0]]
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31 {
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32 is,is not <- If[[[year]%[4]]=[0]]
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33 }
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34 }
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35 }
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36
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37 _Month From Day[day,days,current:month,day in month]
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38 {
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39 curdays <- [days]Index[current]
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40 If[[day]<[curdays]]
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41 {
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42 month <- current
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43 day in month <- day
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44 }{
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45 month,day in month <- _Month From Day[[day]-[curdays], days, [current]+[1]]
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46 }
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47 }
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48
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49 Month From Day[day,year:month,day in month]
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50 {
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51 base <- (31,28,31,30,31,30,31,31,30,31,30,31)
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52 Is Leap Year[year]
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53 {
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54 days <- [base]Set[1, 29]
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55 }{
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56 days <- Val[base]
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57 }
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58 month,day in month <- _Month From Day[day, days, 0]
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59 }
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60
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61 Blueprint Date Time
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62 {
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63 Long:Fifty Micros
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64 Word:Year
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65 Byte:Month
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66 Byte:Day
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67 }
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68
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69 Date Time From Unix[unix:date]
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70 {
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71 ,sec in day <- Days From Secs[unix]
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72 { year <- Year From Unix Days[~] {}
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73 { month, day <- Month From Day[~, year] }}
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74 date <- [[[[Build["Date Time"]]Fifty Micros <<[[sec in day]*[20000]]]Year <<[year]]Month <<[[month]+[1]]]Day <<[[day]+[1]]
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75 }
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76
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77 Now[:date]
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78 {
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79 date <- Date Time From Unix[Unix Time[]]
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80 }
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81
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82 Seconds@Date Time[date:out]
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83 {
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84 out <- [[[date]Fifty Micros >>]/[20000]]%[60]
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85 }
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86
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87 Milliseconds@Date Time[date:out]
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88 {
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89 out <- [[[date]Fifty Micros >>]/[20]]%[60000]
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90 }
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91
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92 Microseconds@Date Time[date:out]
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93 {
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94 out <- [[[date]Fifty Micros >>]%[20]]*[50]
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95 }
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96
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97 Hours@Date Time[date:out]
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98 {
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99 out <- [[date]Fifty Micros >>]/[[[20000]*[60]]*[60]]
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100 }
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101
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102 Minutes@Date Time[date:out]
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103 {
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104 out <- [[[date]Fifty Micros >>]/[[20000]*[60]]]%[60]
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105 }
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106
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107 Day in Year@Date Time[date:out]
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108 {
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109 base day <- [(0,0,31,59,90,120,151,181,212,243,273,304,334)]Index[[date]Month >>]
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110 ,noleap <- If[[[date]Month >>] > [2]]
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111 {
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112 ,noleap <- Is Leap Year[[date]Year >>]
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113 {
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114 out <- [base day] + [[date]Day >>]
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115 }
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116 }
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117 Val[noleap]
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118 {
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119 out <- [[base day] + [[date]Day >>]]-[1]
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120 }
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121 }
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122
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123 //Gregorian only for the moment
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124 //Sunday = 0, Saturday = 6
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125 //Uses Zeller's algorithm
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126 Day of Week@Date Time[date:out]
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127 {
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128 If[[[date]Month >>] < [3]]
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129 {
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130 zmonth <- [[date]Month >>]+[12]
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131 zyear <- [[date]Year >>]-[1]
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132 }{
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133 zmonth <- [date]Month >>
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134 zyear <- [date]Year >>
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135 }
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136 [zyear]Slice@String[2]
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137 { century <- <String@Whole Number[~] }
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138 { y <- <String@Whole Number[~] }
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139
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140 a <- [[26]* [[zmonth]+[1]]]/[10]
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141 b <- [[5]*[y]]/[4]
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142 c <- [century]/[4]
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143 d <- [2]*[century]
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144
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145 out <- [[-[+[+[+[[date]Day >>, a], b], c], d]] + [6]] % [7]
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146 }
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147
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148 Format@Date Time[date,format:out]
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149 {
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150 If[[format]=[""]]
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151 {
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152 out <- ""
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153 }{
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154 months <- ("", "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December")
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155 days <- ("Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday")
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156 cur,rest format <- [format]Slice[1]
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157 If[[cur] = ["Y"]]
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158 {
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159 piece <- [date]Year >>
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160 }{ If[[cur] = ["M"]]
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161 {
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162 piece <- [date]Month >>
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163 }{ If[[cur] = ["N"]]
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164 {
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165 tpiece <- [months]Index[[date]Month >>]
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166 }{ If[[cur] = ["B"]]
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167 {
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168 tpiece <- [[months]Index[[date]Month >>]]Slice[3]
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169 }{ If[[cur] = ["D"]]
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170 {
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171 ppiece <- [date]Day >>
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172 }{ If[[cur] = ["d"]]
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173 {
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174 piece <- [date]Day >>
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175 }{ If[[cur] = ["n"]]
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176 {
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177 tpiece <- [days]Index[[date]Day of Week]
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178 }{ If[[cur] = ["b"]]
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179 {
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180 tpiece <- [[days]Index[[date]Day of Week]]Slice[3]
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181 }{ If[[cur] = ["w"]]
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182 {
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183 piece <- Day of Week[date]
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184 }{ If[[cur] = ["h"]]
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185 {
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186 hour <- [date]Hours
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187 If[[hour] > [12]]
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188 {
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189 ppiece <- [hour]-[12]
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190 }{
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191 If[[hour] = [0]]
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192 { ppiece <- 12 }
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193 { ppiece <- Val[hour] }
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194 }
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195 }{ If[[cur] = ["H"]]
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196 {
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197 ppiece <- Hours[date]
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198 }{ If[[cur] = ["m"]]
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199 {
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200 ppiece <- Minutes[date]
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201 }{ If[[cur] = ["s"]]
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202 {
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203 ppiece <- Seconds[date]
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204 }{ If[[cur] = ["a"]]
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205 {
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206 If[[[date]Hours] < [12]]
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207 { tpiece <- "AM" }
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208 { tpiece <- "PM" }
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209 }{ If[[cur] = ["t"]]
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210 {
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211 ppiece <- Milliseconds[date]
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212 }{
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213 tpiece <- Val[cur]
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214 }}}}}}}}}}}}}}}
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215
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216 sppiece <- <Whole Number@String[ppiece]
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217
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218 If[[[sppiece]Length] < [2]]
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219 {
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220 tpiece <- ["0"]Append[sppiece]
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221 }{
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222 tpiece <- Val[sppiece]
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223 }
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224 tpiece <- <Whole Number@String[piece]
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225 out <- [tpiece]Append[[date]Format[rest format]]
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226
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227 }
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228 }
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229
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230 RFC 2822@Date Time[date:out]
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231 {
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232 out <- [date]Format["d B Y H:m:s -0000"]
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233 }
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234
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235 //Preferred format for HTTP as specified by RFC 2616
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236 RFC 2616@Date Time[date:out]
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237 {
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238 out <- [[date]Format["b, D B Y H:m:s"]]Append[" GMT"]
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239 }
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240
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241
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