132 lines
3.2 KiB
C#
132 lines
3.2 KiB
C#
//
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// XmlSignatureStreamReader.cs: Wrap TextReader and eliminate \r
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//
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// Author:
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// Atsushi Enomoto (atsushi@ximian.com)
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//
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// (C) 2005 Novell Inc.
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//
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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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//
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// Use it to distinguish 
 and \r. \r is removed, while 
 is not.
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//
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//
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using System;
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using System.IO;
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using System.Runtime.InteropServices;
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namespace System.Security.Cryptography.Xml
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{
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internal class XmlSignatureStreamReader : TextReader
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{
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TextReader source;
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int cache = int.MinValue;
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public XmlSignatureStreamReader (TextReader input)
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{
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source =input;
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}
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public override void Close ()
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{
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source.Close ();
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}
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public override int Peek ()
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{
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// If source TextReader does not support Peek(),
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// it does not support too. Or it just returns EOF.
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if (source.Peek () == -1)
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return -1;
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if (cache != int.MinValue)
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return cache;
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cache = source.Read ();
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if (cache != '\r')
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return cache;
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// cache must be '\r' here.
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if (source.Peek () != '\n')
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return '\r';
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// Now Peek() returns '\n', so clear cache.
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cache = int.MinValue;
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return '\n';
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}
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public override int Read ()
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{
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if (cache != int.MinValue) {
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int ret = cache;
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cache = int.MinValue;
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return ret;
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}
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int i = source.Read ();
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if (i != '\r')
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return i;
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// read one more char (after '\r')
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cache = source.Read ();
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if (cache != '\n')
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return '\r';
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cache = int.MinValue;
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return '\n';
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}
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public override int ReadBlock (
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[In, Out] char [] buffer, int index, int count)
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{
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char [] tmp = new char [count];
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source.ReadBlock (tmp, 0, count);
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int j = index;
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for (int i = 0; i < count; j++) {
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if (tmp [i] == '\r') {
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if (++i < tmp.Length && tmp [i] == '\n')
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buffer [j] = tmp [i++];
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else
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buffer [j] = '\r';
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}
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else
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buffer [j] = tmp [i];
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}
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while (j < count) {
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int d = Read ();
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if (d < 0)
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break;
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buffer [j++] = (char) d;
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}
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return j;
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}
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// I have no idea what to do here, but I don't think it
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// makes sense.
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public override string ReadLine ()
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{
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return source.ReadLine ();
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}
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public override string ReadToEnd ()
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{
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return source.ReadToEnd ().Replace ("\r\n", "\n");
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}
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}
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}
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