[Mono-bugs] [Bug 23116] New - GetCharCount affects iconv internal state

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Changed by piersh@friskit.com.

http://bugzilla.ximian.com/show_bug.cgi?id=23116

--- shadow/23116	Sat Apr  6 19:54:20 2002
+++ shadow/23116.tmp.8614	Sat Apr  6 19:54:20 2002
@@ -0,0 +1,66 @@
+Bug#: 23116
+Product: Mono/Runtime
+Version: unspecified
+OS: 
+OS Details: 
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Wishlist
+Component: misc
+AssignedTo: mono-bugs@ximian.com                            
+ReportedBy: piersh@friskit.com               
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: GetCharCount  affects iconv internal state
+
+There's a bug somewhere in the iconv routines on windows. It seems that 
+the 'iconv_get_length()' call is affecting whether or not the first 
+character is 0xFEFF.
+
+Here's a test case:
+
+using System;
+using System.Text;
+namespace Test {
+	public class Test {
+		public static void Main () {
+			byte [] rgb = {65};
+			char [] rgch = new char [2];
+
+			Decoder decoder1 = Encoding.UTF8.GetDecoder ();
+			decoder1.GetChars (rgb, 0, 1, rgch, 0);
+			Console.WriteLine ((int) rgch[0] + " : " + rgch
+[0]);
+
+			Decoder decoder2 = Encoding.UTF8.GetDecoder ();
+			int cch = decoder2.GetCharCount (rgb, 0, 1);
+			decoder2.GetChars (rgb, 0, 1, rgch, 0);
+			Console.WriteLine ((int) rgch[0] + " : " + rgch
+[0]);
+		}
+	}
+}
+
+Under .NET the output is:
+	65 : A
+	65 : A
+
+Under mint (on windows) it's:
+	65279 : 
+	65 : A
+
+The only difference is that for the second conversion, it calls 
+GetCharCount first.
+
+65279 == 0xFEFF
+
+Also, it pops up an error dialog if you replace the '[2]' with '[1]', it 
+says:
+	(process:3824): **ERROR**: file unicode.c: line 381 
+(iconv_convert): should not be reached
+And then dies.
+
+Piers.