| /************************************************************** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the 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 ); |
| rtl_copyMemory( 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 |
