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108 lines
3.0 KiB
108 lines
3.0 KiB
/* dataprovider.cpp
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Copyright (C) 2004 Klarälvdalens Datakonsult AB
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This file is part of TQGPGME.
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TQGPGME is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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TQGPGME is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with TQGPGME; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */
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// -*- c++ -*-
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#include <config.h>
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#include <qgpgme/dataprovider.h>
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#include <string.h>
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#include <errno.h>
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#include <assert.h>
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#include <unistd.h>
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static bool resizeAndInit( TQByteArray & ba, size_t newSize ) {
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const size_t oldSize = ba.size();
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bool ok = ba.tqresize( newSize );
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if ( ok )
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memset( ba.data() + oldSize, 0, newSize - oldSize );
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return ok;
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}
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QGpgME::TQByteArrayDataProvider::TQByteArrayDataProvider()
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: GpgME::DataProvider(), mOff( 0 ) {}
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QGpgME::TQByteArrayDataProvider::TQByteArrayDataProvider( const TQByteArray & initialData )
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: GpgME::DataProvider(), mArray( initialData ), mOff( 0 ) {}
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QGpgME::TQByteArrayDataProvider::~TQByteArrayDataProvider() {}
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ssize_t QGpgME::TQByteArrayDataProvider::read( void * buffer, size_t bufSize ) {
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#ifndef NDEBUG
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//qDebug( "QGpgME::TQByteArrayDataProvider::read( %p, %d )", buffer, bufSize );
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#endif
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if ( bufSize == 0 )
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return 0;
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if ( mOff >= mArray.size() )
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return 0; // EOF
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size_t amount = TQMIN( bufSize, mArray.size() - mOff );
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assert( amount > 0 );
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memcpy( buffer, mArray.data() + mOff, amount );
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mOff += amount;
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return amount;
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}
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ssize_t QGpgME::TQByteArrayDataProvider::write( const void * buffer, size_t bufSize ) {
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#ifndef NDEBUG
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qDebug( "QGpgME::TQByteArrayDataProvider::write( %p, %d )", buffer, bufSize );
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#endif
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if ( bufSize == 0 )
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return 0;
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if ( mOff >= mArray.size() )
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resizeAndInit( mArray, mOff + bufSize );
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if ( mOff >= mArray.size() ) {
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errno = EIO;
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return -1;
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}
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assert( bufSize <= mArray.size() - mOff );
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memcpy( mArray.data() + mOff, buffer, bufSize );
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mOff += bufSize;
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return bufSize;
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}
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off_t QGpgME::TQByteArrayDataProvider::seek( off_t offset, int whence ) {
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#ifndef NDEBUG
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qDebug( "QGpgME::TQByteArrayDataProvider::seek( %d, %d )", int(offset), whence );
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#endif
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int newOffset = mOff;
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switch ( whence ) {
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case SEEK_SET:
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newOffset = offset;
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break;
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case SEEK_CUR:
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newOffset += offset;
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break;
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case SEEK_END:
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newOffset = mArray.size() + offset;
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break;
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default:
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errno = EINVAL;
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return (off_t)-1;
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}
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return mOff = newOffset;
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}
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void QGpgME::TQByteArrayDataProvider::release() {
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#ifndef NDEBUG
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qDebug( "QGpgME::TQByteArrayDataProvider::release()" );
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#endif
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mArray = TQByteArray();
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}
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