2 * System.TimeZoneInfo.Serialization
5 * Sasha Kotlyar <sasha@arktronic.com>
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27 using System.Collections.Generic;
28 using System.Globalization;
29 using System.Runtime.Serialization;
35 partial class TimeZoneInfo
37 public static TimeZoneInfo FromSerializedString (string source)
39 var input = new StringBuilder (source);
40 var tzId = DeserializeString (ref input);
41 var offset = DeserializeInt (ref input);
42 var displayName = DeserializeString (ref input);
43 var standardName = DeserializeString (ref input);
44 var daylightName = DeserializeString (ref input);
45 var rules = new List<TimeZoneInfo.AdjustmentRule> ();
46 while (input [0] != ';') {
47 rules.Add (DeserializeAdjustmentRule (ref input));
49 var offsetSpan = TimeSpan.FromMinutes (offset);
50 return TimeZoneInfo.CreateCustomTimeZone (tzId, offsetSpan, displayName, standardName, daylightName, rules.ToArray ());
53 public string ToSerializedString ()
55 var stb = new StringBuilder ();
56 var daylightName = (string.IsNullOrEmpty(this.DaylightName) ? this.StandardName : this.DaylightName);
57 stb.AppendFormat ("{0};{1};{2};{3};{4};", EscapeForSerialization (this.Id), (int)this.BaseUtcOffset.TotalMinutes,
58 EscapeForSerialization (this.DisplayName), EscapeForSerialization (this.StandardName), EscapeForSerialization (daylightName));
60 if (this.SupportsDaylightSavingTime) {
61 foreach (var rule in this.GetAdjustmentRules()) {
62 var start = rule.DateStart.ToString ("MM:dd:yyyy", CultureInfo.InvariantCulture);
63 var end = rule.DateEnd.ToString ("MM:dd:yyyy", CultureInfo.InvariantCulture);
64 var delta = (int)rule.DaylightDelta.TotalMinutes;
65 var transitionStart = SerializeTransitionTime (rule.DaylightTransitionStart);
66 var transitionEnd = SerializeTransitionTime (rule.DaylightTransitionEnd);
67 stb.AppendFormat ("[{0};{1};{2};{3};{4};]", start, end, delta,
68 transitionStart, transitionEnd);
73 return stb.ToString ();
76 private static TimeZoneInfo.AdjustmentRule DeserializeAdjustmentRule (ref StringBuilder input)
78 // Similar to: [01:01:0001;12:31:9999;60;[0;01:00:00;3;5;0;];[0;02:00:00;10;5;0;];]
80 throw new SerializationException ();
81 input.Remove (0, 1); // [
82 var dateStart = DeserializeDate (ref input);
83 var dateEnd = DeserializeDate (ref input);
84 var delta = DeserializeInt (ref input);
85 var transitionStart = DeserializeTransitionTime (ref input);
86 var transitionEnd = DeserializeTransitionTime (ref input);
87 input.Remove (0, 1); // ]
88 var deltaSpan = TimeSpan.FromMinutes (delta);
89 return TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (dateStart, dateEnd, deltaSpan,
90 transitionStart, transitionEnd);
93 private static TimeZoneInfo.TransitionTime DeserializeTransitionTime (ref StringBuilder input)
95 if (input [0] != '[' || (input [1] != '0' && input [1] != '1') || input [2] != ';')
96 throw new SerializationException ();
98 input.Remove (0, 3); // [#;
99 var timeOfDay = DeserializeTime (ref input);
100 var month = DeserializeInt (ref input);
102 // Floating rule such as: [0;01:00:00;3;5;0;];
103 var week = DeserializeInt (ref input);
104 var dayOfWeek = DeserializeInt (ref input);
105 input.Remove (0, 2); // ];
106 return TimeZoneInfo.TransitionTime.CreateFloatingDateRule (timeOfDay, month, week, (DayOfWeek)dayOfWeek);
109 // Fixed rule such as: [1;02:15:59.999;6;2;];
110 var day = DeserializeInt (ref input);
111 input.Remove (0, 2); // ];
112 return TimeZoneInfo.TransitionTime.CreateFixedDateRule (timeOfDay, month, day);
115 private static string DeserializeString (ref StringBuilder input)
117 var stb = new StringBuilder ();
118 var isEscaped = false;
120 for (charCount = 0; charCount < input.Length; charCount++) {
121 var inChar = input [charCount];
125 } else if (inChar == '\\') {
128 } else if (inChar == ';') {
134 input.Remove (0, charCount + 1);
135 return stb.ToString ();
138 private static int DeserializeInt(ref StringBuilder input)
141 while(charCount++ < input.Length)
143 if (input[charCount] == ';')
147 if(!int.TryParse(input.ToString(0, charCount), NumberStyles.Integer, CultureInfo.InvariantCulture, out result))
148 throw new SerializationException();
149 input.Remove(0, charCount + 1);
153 private static DateTime DeserializeDate (ref StringBuilder input)
155 var inChars = new char[11];
156 input.CopyTo (0, inChars, 0, inChars.Length);
158 if (!DateTime.TryParseExact (new string (inChars), "MM:dd:yyyy;", CultureInfo.InvariantCulture, DateTimeStyles.None, out result))
159 throw new SerializationException ();
160 input.Remove (0, inChars.Length);
164 private static DateTime DeserializeTime (ref StringBuilder input)
166 if (input [8] == ';') {
167 // Without milliseconds
168 var inChars = new char[9];
169 input.CopyTo (0, inChars, 0, inChars.Length);
171 if (!DateTime.TryParseExact (new string (inChars), "HH:mm:ss;", CultureInfo.InvariantCulture, DateTimeStyles.NoCurrentDateDefault, out result))
172 throw new SerializationException ();
173 input.Remove (0, inChars.Length);
175 } else if (input [12] == ';') {
177 char[] inChars = new char[13];
178 input.CopyTo (0, inChars, 0, inChars.Length);
179 var inString = new string (inChars);
181 if (!DateTime.TryParseExact (inString, "HH:mm:ss.fff;", CultureInfo.InvariantCulture, DateTimeStyles.NoCurrentDateDefault, out result))
182 throw new SerializationException ();
183 input.Remove (0, inChars.Length);
186 throw new SerializationException ();
189 private static string EscapeForSerialization (string unescaped)
191 return unescaped.Replace (@"\", @"\\").Replace (";", "\\;");
194 private static string SerializeTransitionTime (TimeZoneInfo.TransitionTime transition)
197 if (transition.TimeOfDay.Millisecond > 0)
198 timeOfDay = transition.TimeOfDay.ToString ("HH:mm:ss.fff");
200 timeOfDay = transition.TimeOfDay.ToString ("HH:mm:ss");
202 if (transition.IsFixedDateRule) {
203 return string.Format ("[1;{0};{1};{2};]", timeOfDay, transition.Month, transition.Day);
206 return string.Format ("[0;{0};{1};{2};{3};]", timeOfDay, transition.Month,
207 transition.Week, (int)transition.DayOfWeek);