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1 /*******************************************************************************
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2
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3 @file UTimeZone.d
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4
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5 Copyright (c) 2004 Kris Bell
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6
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7 This software is provided 'as-is', without any express or implied
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8 warranty. In no event will the authors be held liable for damages
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9 of any kind arising from the use of this software.
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10
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11 Permission is hereby granted to anyone to use this software for any
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12 purpose, including commercial applications, and to alter it and/or
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13 redistribute it freely, subject to the following restrictions:
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14
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15 1. The origin of this software must not be misrepresented; you must
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16 not claim that you wrote the original software. If you use this
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17 software in a product, an acknowledgment within documentation of
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18 said product would be appreciated but is not required.
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19
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20 2. Altered source versions must be plainly marked as such, and must
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21 not be misrepresented as being the original software.
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22
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23 3. This notice may not be removed or altered from any distribution
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24 of the source.
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25
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26 4. Derivative works are permitted, but they must carry this notice
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27 in full and credit the original source.
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28
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29
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30 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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31
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32
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33 @version Initial version, November 2004
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34 @author Kris
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35
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36 Note that this package and documentation is built around the ICU
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37 project (http://oss.software.ibm.com/icu/). Below is the license
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38 statement as specified by that software:
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39
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40
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41 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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42
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43
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44 ICU License - ICU 1.8.1 and later
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45
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46 COPYRIGHT AND PERMISSION NOTICE
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47
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48 Copyright (c) 1995-2003 International Business Machines Corporation and
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49 others.
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50
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51 All rights reserved.
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52
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53 Permission is hereby granted, free of charge, to any person obtaining a
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54 copy of this software and associated documentation files (the
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55 "Software"), to deal in the Software without restriction, including
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56 without limitation the rights to use, copy, modify, merge, publish,
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57 distribute, and/or sell copies of the Software, and to permit persons
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58 to whom the Software is furnished to do so, provided that the above
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59 copyright notice(s) and this permission notice appear in all copies of
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60 the Software and that both the above copyright notice(s) and this
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61 permission notice appear in supporting documentation.
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62
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63 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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64 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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65 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
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66 OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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67 HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
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68 INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
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69 FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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70 NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
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71 WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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72
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73 Except as contained in this notice, the name of a copyright holder
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74 shall not be used in advertising or otherwise to promote the sale, use
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75 or other dealings in this Software without prior written authorization
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76 of the copyright holder.
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77
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78 ----------------------------------------------------------------------
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79
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80 All trademarks and registered trademarks mentioned herein are the
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81 property of their respective owners.
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82
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83 *******************************************************************************/
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84
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85 module dwtx.dwtxhelper.mangoicu.UTimeZone;
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86
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87 private import dwtx.dwtxhelper.mangoicu.ICU,
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88 dwtx.dwtxhelper.mangoicu.UString,
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89 dwtx.dwtxhelper.mangoicu.UEnumeration;
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90
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91 /*******************************************************************************
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92
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93 A representation of a TimeZone. Unfortunately, ICU does not expose
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94 this as a seperate entity from the C-API, so we have to make do
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95 with an approximation instead.
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96
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97 *******************************************************************************/
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98
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99 struct UTimeZone
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100 {
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101 public wchar[] name;
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102
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103 public static UTimeZone Default = {null};
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104 public static UTimeZone Gmt = {"Etc/GMT"};
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105 public static UTimeZone Greenwich = {"Etc/Greenwich"};
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106 public static UTimeZone Uct = {"Etc/UCT"};
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107 public static UTimeZone Utc = {"Etc/UTC"};
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108 public static UTimeZone Universal = {"Etc/Universal"};
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109
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110 public static UTimeZone GmtPlus0 = {"Etc/GMT+0"};
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111 public static UTimeZone GmtPlus1 = {"Etc/GMT+1"};
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112 public static UTimeZone GmtPlus2 = {"Etc/GMT+2"};
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113 public static UTimeZone GmtPlus3 = {"Etc/GMT+3"};
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114 public static UTimeZone GmtPlus4 = {"Etc/GMT+4"};
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115 public static UTimeZone GmtPlus5 = {"Etc/GMT+5"};
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116 public static UTimeZone GmtPlus6 = {"Etc/GMT+6"};
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117 public static UTimeZone GmtPlus7 = {"Etc/GMT+7"};
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118 public static UTimeZone GmtPlus8 = {"Etc/GMT+8"};
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119 public static UTimeZone GmtPlus9 = {"Etc/GMT+9"};
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120 public static UTimeZone GmtPlus10 = {"Etc/GMT+10"};
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121 public static UTimeZone GmtPlus11 = {"Etc/GMT+11"};
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122 public static UTimeZone GmtPlus12 = {"Etc/GMT+12"};
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123
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124 public static UTimeZone GmtMinus0 = {"Etc/GMT-0"};
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125 public static UTimeZone GmtMinus1 = {"Etc/GMT-1"};
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126 public static UTimeZone GmtMinus2 = {"Etc/GMT-2"};
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127 public static UTimeZone GmtMinus3 = {"Etc/GMT-3"};
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128 public static UTimeZone GmtMinus4 = {"Etc/GMT-4"};
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129 public static UTimeZone GmtMinus5 = {"Etc/GMT-5"};
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130 public static UTimeZone GmtMinus6 = {"Etc/GMT-6"};
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131 public static UTimeZone GmtMinus7 = {"Etc/GMT-7"};
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132 public static UTimeZone GmtMinus8 = {"Etc/GMT-8"};
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133 public static UTimeZone GmtMinus9 = {"Etc/GMT-9"};
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134 public static UTimeZone GmtMinus10 = {"Etc/GMT-10"};
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135 public static UTimeZone GmtMinus11 = {"Etc/GMT-11"};
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136 public static UTimeZone GmtMinus12 = {"Etc/GMT-12"};
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137
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138 /***********************************************************************
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139
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140 Get the default time zone.
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141
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142 ***********************************************************************/
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143
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144 static void getDefault (inout UTimeZone zone)
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145 {
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146 uint format (wchar* dst, uint length, inout ICU.UErrorCode e)
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147 {
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148 return ucal_getDefaultTimeZone (dst, length, e);
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149 }
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150
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151 UString s = new UString(64);
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152 s.format (&format, "failed to get default time zone");
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153 zone.name = s.get();
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154 }
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155
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156 /***********************************************************************
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157
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158 Set the default time zone.
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159
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160 ***********************************************************************/
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161
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162 static void setDefault (inout UTimeZone zone)
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163 {
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164 ICU.UErrorCode e;
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165
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166 ucal_setDefaultTimeZone (ICU.toString (zone.name), e);
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167 ICU.testError (e, "failed to set default time zone");
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168 }
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169
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170 /***********************************************************************
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171
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172 Return the amount of time in milliseconds that the clock
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173 is advanced during daylight savings time for the given
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174 time zone, or zero if the time zone does not observe daylight
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175 savings time
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176
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177 ***********************************************************************/
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178
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179 static uint getDSTSavings (inout UTimeZone zone)
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180 {
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181 ICU.UErrorCode e;
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182
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183 uint x = ucal_getDSTSavings (ICU.toString (zone.name), e);
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184 ICU.testError (e, "failed to get DST savings");
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185 return x;
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186 }
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187
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188
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189 /**********************************************************************
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190
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191 Iterate over the available timezone names
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192
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193 **********************************************************************/
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194
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195 static int opApply (int delegate(inout wchar[] element) dg)
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196 {
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197 ICU.UErrorCode e;
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198 wchar[] name;
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199 int result;
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200
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201 void* h = ucal_openTimeZones (e);
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202 ICU.testError (e, "failed to open timeszone iterator");
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203
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204 UEnumeration zones = new UEnumeration (cast(UEnumeration.Handle) h);
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205 while (zones.next(name) && (result = dg(name)) != 0) {}
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206 delete zones;
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207 return result;
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208 }
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209
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210
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211
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212 /***********************************************************************
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213
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214 Bind the ICU functions from a shared library. This is
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215 complicated by the issues regarding D and DLLs on the
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216 Windows platform
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217
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218 ***********************************************************************/
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219
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220 private static void* library;
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221
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222 /***********************************************************************
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223
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224 ***********************************************************************/
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225
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226 private static extern (C)
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227 {
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228 void* function (inout ICU.UErrorCode) ucal_openTimeZones;
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229 uint function (wchar*, uint, inout ICU.UErrorCode) ucal_getDefaultTimeZone;
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230 void function (wchar*, inout ICU.UErrorCode) ucal_setDefaultTimeZone;
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231 uint function (wchar*, inout ICU.UErrorCode) ucal_getDSTSavings;
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232 }
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233
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234 /***********************************************************************
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235
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236 ***********************************************************************/
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237
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238 static FunctionLoader.Bind[] targets =
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239 [
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240 {cast(void**) &ucal_openTimeZones, "ucal_openTimeZones"},
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241 {cast(void**) &ucal_getDefaultTimeZone, "ucal_getDefaultTimeZone"},
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242 {cast(void**) &ucal_setDefaultTimeZone, "ucal_setDefaultTimeZone"},
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243 {cast(void**) &ucal_getDSTSavings, "ucal_getDSTSavings"},
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244 ];
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245
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246 /***********************************************************************
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247
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248 ***********************************************************************/
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249
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250 static this ()
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251 {
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252 library = FunctionLoader.bind (ICU.icuin, targets);
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253 }
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254
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255 /***********************************************************************
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256
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257 ***********************************************************************/
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258
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259 static ~this ()
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260 {
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261 FunctionLoader.unbind (library);
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262 }
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263 }
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