64 lines
2.1 KiB
C#
64 lines
2.1 KiB
C#
//
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// QualityValue.cs
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//
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// Authors:
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// Marek Safar <marek.safar@gmail.com>
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//
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// Copyright (C) 2011 Xamarin Inc (http://www.xamarin.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.Globalization;
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using System.Collections.Generic;
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namespace System.Net.Http.Headers
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{
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static class QualityValue
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{
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public static double? GetValue (List<NameValueHeaderValue> parameters)
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{
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if (parameters == null)
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return null;
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var found = parameters.Find (l => string.Equals (l.Name, "q", StringComparison.OrdinalIgnoreCase));
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if (found == null)
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return null;
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double value;
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if (!double.TryParse (found.Value, NumberStyles.Number, NumberFormatInfo.InvariantInfo, out value))
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return null;
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return value;
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}
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public static void SetValue (ref List<NameValueHeaderValue> parameters, double? value)
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{
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if (value < 0 || value > 1)
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throw new ArgumentOutOfRangeException ("Quality");
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if (parameters == null)
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parameters = new List<NameValueHeaderValue> ();
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parameters.SetValue ("q", value == null ? null : value.Value.ToString (NumberFormatInfo.InvariantInfo));
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}
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}
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}
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