author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 26 Jan 2010 15:16:33 +0200 | |
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// Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies). |
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// All rights reserved. |
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// This component and the accompanying materials are made available |
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// under the terms of "Eclipse Public License v1.0" |
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// which accompanies this distribution, and is available |
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// at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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// |
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// Initial Contributors: |
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// Nokia Corporation - initial contribution. |
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// |
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// Contributors: |
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// |
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// Description: |
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// uniload.cpp - universal file load (work for narrow or wide builds) |
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// |
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|
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#include "uniload.h" |
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|
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HBufC *UnicodeLoad::LoadL(RFs &aFs, const TDesC &aName) |
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{ |
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RFile pf; |
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TInt size; |
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User::LeaveIfError(pf.Open(aFs, aName, EFileShareAny)); |
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pf.Size(size); |
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// |
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// For narrow build, this allocates exactly right amount |
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// of space, for Unicode build, this allocates the size |
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// doubled in bytes, which is exactly what we want, if |
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// we need to widen the narrow Ascii control file (this |
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// is assumed to be the default case). For UNICODE file |
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// in UNICODE environment, this allocates too much space. |
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// |
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HBufC *data = HBufC::New(size); |
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|
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if (data == NULL) |
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{ |
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pf.Close(); |
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User::Leave(KErrNoMemory); |
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} |
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// |
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// buf is "native" pointer, either 16 or 8 wide |
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// |
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TPtr buf(data->Des()); |
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#ifdef __WINS__ |
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buf.Set(data->Des()); // VC6 kludge |
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#endif |
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// |
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// ptr is always 8 wide |
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// |
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TPtr8 ptr((TUint8 *)buf.Ptr(), size, size); |
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pf.Read(ptr); |
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pf.Close(); |
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if (size >= 2 && ptr[0] == 0xFF && ptr[1] == 0xFE) |
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{ |
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// |
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// The file is presented as UNICODE text |
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// (for now, only one byte order supported) |
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// |
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size -= 2; |
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#ifdef _UNICODE |
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Mem::Copy((TUint8 *)ptr.Ptr(), ptr.Ptr() + 2, size); |
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buf.SetLength(size / 2); // True number of Unicode characters. |
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#else |
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// Trying to load a Unicode file for Narrow build |
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size = size / 2; |
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for (TInt i = 1; i < size; ++i) |
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{ |
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if (ptr[2*i] != 0) |
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ptr[i] = 0x01; // Substitute too wide stuff with 0x1 |
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else |
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ptr[i] = ptr[2*i + 1]; |
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} |
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buf.SetLength(size); |
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#endif |
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} |
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else |
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{ |
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// |
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// The file is narrow, 8 bit characters |
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// |
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buf.SetLength(size); |
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#ifdef _UNICODE |
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// Must "widen" the characters for unicode. |
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for (TInt i = size; --i >= 0; ) |
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buf[i] = ptr[i]; |
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#endif |
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} |
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return data; |
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} |