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Diffstat (limited to 'package/source/zipapi/MemoryByteGrabber.hxx')
| -rw-r--r-- | package/source/zipapi/MemoryByteGrabber.hxx | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/package/source/zipapi/MemoryByteGrabber.hxx b/package/source/zipapi/MemoryByteGrabber.hxx new file mode 100644 index 000000000000..8a8d96556bae --- /dev/null +++ b/package/source/zipapi/MemoryByteGrabber.hxx @@ -0,0 +1,177 @@ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ +#ifndef _MEMORY_BYTE_GRABBER_HXX_ +#define _MEMORY_BYTE_GRABBER_HXX_ + +#include <com/sun/star/io/XInputStream.hpp> +#include <com/sun/star/io/XSeekable.hpp> +#include <string.h> + +class MemoryByteGrabber +{ +protected: + const com::sun::star::uno::Sequence < sal_Int8 > maBuffer; + const sal_Int8 *mpBuffer; + sal_Int32 mnCurrent, mnEnd; +public: + MemoryByteGrabber ( const com::sun::star::uno::Sequence < sal_Int8 > & rBuffer ) + : maBuffer ( rBuffer ) + , mpBuffer ( rBuffer.getConstArray() ) + , mnCurrent ( 0 ) + , mnEnd ( rBuffer.getLength() ) + { + } + MemoryByteGrabber() + { + } + const sal_Int8 * getCurrentPos () { return mpBuffer + mnCurrent; } + + // XInputStream chained + sal_Int32 SAL_CALL readBytes( com::sun::star::uno::Sequence< sal_Int8 >& aData, + sal_Int32 nBytesToRead ) + throw(com::sun::star::io::NotConnectedException, com::sun::star::io::BufferSizeExceededException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException) + { + if ( nBytesToRead < 0) + throw com::sun::star::io::BufferSizeExceededException(); + + if (nBytesToRead + mnCurrent > mnEnd) + nBytesToRead = mnEnd - mnCurrent; + + aData.realloc ( nBytesToRead ); + memcpy ( aData.getArray(), mpBuffer + mnCurrent, nBytesToRead ); + mnCurrent += nBytesToRead; + return nBytesToRead; + } + + sal_Int32 SAL_CALL readSomeBytes( com::sun::star::uno::Sequence< sal_Int8 >& aData, + sal_Int32 nMaxBytesToRead ) + throw(com::sun::star::io::NotConnectedException, com::sun::star::io::BufferSizeExceededException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException) + { + return readBytes( aData, nMaxBytesToRead ); + } + void SAL_CALL skipBytes( sal_Int32 nBytesToSkip ) + throw(com::sun::star::io::NotConnectedException, com::sun::star::io::BufferSizeExceededException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException) + { + mnCurrent += nBytesToSkip; + } + sal_Int32 SAL_CALL available( ) + throw(com::sun::star::io::NotConnectedException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException) + { + return mnEnd - mnCurrent; + } + void SAL_CALL closeInput( ) + throw(com::sun::star::io::NotConnectedException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException) + { + } + + // XSeekable chained... + sal_Int64 SAL_CALL seek( sal_Int64 location ) + throw(com::sun::star::lang::IllegalArgumentException, com::sun::star::io::IOException, com::sun::star::uno::RuntimeException) + { + if ( location < 0 || location > mnEnd ) + throw com::sun::star::lang::IllegalArgumentException (); + mnCurrent = static_cast < sal_Int32 > ( location ); + return mnCurrent; + } + sal_Int64 SAL_CALL getPosition( ) + throw(com::sun::star::io::IOException, com::sun::star::uno::RuntimeException) + { + return mnCurrent; + } + sal_Int64 SAL_CALL getLength( ) + throw(com::sun::star::io::IOException, com::sun::star::uno::RuntimeException) + { + return mnEnd; + } + MemoryByteGrabber& operator >> (sal_Int8& rInt8) + { + if (mnCurrent + 1 > mnEnd ) + rInt8 = 0; + else + rInt8 = mpBuffer [mnCurrent++] & 0xFF; + return *this; + } + MemoryByteGrabber& operator >> (sal_Int16& rInt16) + { + if (mnCurrent + 2 > mnEnd ) + rInt16 = 0; + else + { + rInt16 = mpBuffer[mnCurrent++] & 0xFF; + rInt16 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 8; + } + return *this; + } + MemoryByteGrabber& operator >> (sal_Int32& rInt32) + { + if (mnCurrent + 4 > mnEnd ) + rInt32 = 0; + else + { + rInt32 = mpBuffer[mnCurrent++] & 0xFF; + rInt32 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 8; + rInt32 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 16; + rInt32 |= ( mpBuffer[mnCurrent++] & 0xFF ) << 24; + } + return *this; + } + + MemoryByteGrabber& operator >> (sal_uInt8& rInt8) + { + if (mnCurrent + 1 > mnEnd ) + rInt8 = 0; + else + rInt8 = mpBuffer [mnCurrent++] & 0xFF; + return *this; + } + MemoryByteGrabber& operator >> (sal_uInt16& rInt16) + { + if (mnCurrent + 2 > mnEnd ) + rInt16 = 0; + else + { + rInt16 = mpBuffer [mnCurrent++] & 0xFF; + rInt16 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 8; + } + return *this; + } + MemoryByteGrabber& operator >> (sal_uInt32& rInt32) + { + if (mnCurrent + 4 > mnEnd ) + rInt32 = 0; + else + { + rInt32 = mpBuffer [mnCurrent++] & 0xFF; + rInt32 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 8; + rInt32 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 16; + rInt32 |= ( mpBuffer [mnCurrent++] & 0xFF ) << 24; + } + return *this; + } +}; + +#endif |