os/ossrv/genericopenlibs/cstdlib/LSTDIO/LSTDIO.CPP
author sl
Tue, 10 Jun 2014 14:32:02 +0200 (2014-06-10)
changeset 1 260cb5ec6c19
permissions -rw-r--r--
Update contrib.
     1 // Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).
     2 // All rights reserved.
     3 // This component and the accompanying materials are made available
     4 // under the terms of "Eclipse Public License v1.0"
     5 // which accompanies this distribution, and is available
     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
     7 //
     8 // Initial Contributors:
     9 // Nokia Corporation - initial contribution.
    10 //
    11 // Contributors:
    12 //
    13 // Description:
    14 // STDIO functions implemented over EPOC32
    15 // 
    16 //
    17 
    18 #include <e32std.h>
    19 #include <_ansi.h>
    20 #include <stdio_r.h>
    21 
    22 #define UNUSED_VAR(a) a = a
    23 
    24 extern "C" {
    25 int e32cvt (char *buf, int buflen, double d, int width, int prec, int /*flags*/, int fchar)
    26 	{
    27 	TPtr8 res((TText8*)buf, buflen);
    28 	TBuf8<0x50> fmt;
    29 	TBool capitalE=EFalse;
    30 	switch(fchar)
    31 	{
    32 	case 'f':
    33 		fchar='f';
    34 		break;
    35 
    36 	case 'E':
    37 		capitalE=ETrue;	// and fallthrough
    38 	case 'e':
    39 		fchar='e';
    40 		break;
    41 
    42 	case 'G':
    43 		capitalE=ETrue;	// and fallthrough
    44 	case 'g':
    45 		fchar='g';
    46 		break;
    47 	default:
    48 		return 0;
    49 	}
    50 	// construct a format string for use with TDes::Format - we can't use the
    51 	// VFPRINTF original because it doesn't quite match and it might involve '*'
    52 	// to read field widths from VFPRINTF arguments.
    53 	fmt.Zero();
    54 	fmt.Append('%');
    55 	// flags?
    56 	if (width)
    57 		fmt.AppendNum(width);
    58 	if (prec>=0)
    59 		{
    60 		fmt.Append('.');
    61 		fmt.AppendNum(prec);
    62 		}
    63 	fmt.Append(fchar);
    64 	TRAPD(r,res.Format(fmt,d));
    65     UNUSED_VAR(r);
    66 	if (capitalE)
    67 		{
    68 		TInt pos=res.Locate('e');
    69 		if (pos!=KErrNotFound)
    70 			res[pos]='E';
    71 		}
    72 	return res.Length();
    73 	}
    74 }