genericopenlibs/cstdlib/LSTDIO/LSTDIO.CPP
changeset 31 ce057bb09d0b
parent 0 e4d67989cc36
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/genericopenlibs/cstdlib/LSTDIO/LSTDIO.CPP	Fri Jun 04 16:20:51 2010 +0100
@@ -0,0 +1,74 @@
+// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// STDIO functions implemented over EPOC32
+// 
+//
+
+#include <e32std.h>
+#include <_ansi.h>
+#include <stdio_r.h>
+
+#define UNUSED_VAR(a) a = a
+
+extern "C" {
+int e32cvt (char *buf, int buflen, double d, int width, int prec, int /*flags*/, int fchar)
+	{
+	TPtr8 res((TText8*)buf, buflen);
+	TBuf8<0x50> fmt;
+	TBool capitalE=EFalse;
+	switch(fchar)
+	{
+	case 'f':
+		fchar='f';
+		break;
+
+	case 'E':
+		capitalE=ETrue;	// and fallthrough
+	case 'e':
+		fchar='e';
+		break;
+
+	case 'G':
+		capitalE=ETrue;	// and fallthrough
+	case 'g':
+		fchar='g';
+		break;
+	default:
+		return 0;
+	}
+	// construct a format string for use with TDes::Format - we can't use the
+	// VFPRINTF original because it doesn't quite match and it might involve '*'
+	// to read field widths from VFPRINTF arguments.
+	fmt.Zero();
+	fmt.Append('%');
+	// flags?
+	if (width)
+		fmt.AppendNum(width);
+	if (prec>=0)
+		{
+		fmt.Append('.');
+		fmt.AppendNum(prec);
+		}
+	fmt.Append(fchar);
+	TRAPD(r,res.Format(fmt,d));
+    UNUSED_VAR(r);
+	if (capitalE)
+		{
+		TInt pos=res.Locate('e');
+		if (pos!=KErrNotFound)
+			res[pos]='E';
+		}
+	return res.Length();
+	}
+}