ucbhelper/source/provider/fd_inputstream.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include "ucbhelper/fd_inputstream.hxx"
  21
  22 #include <rtl/alloc.h>
  23 #include <algorithm>
  24 #include <stdio.h>
  25
  26 using namespace com::sun::star::uno;
  27 using namespace com::sun::star::lang;
  28 using namespace com::sun::star::io;
  29
  30 namespace ucbhelper
  31 {
  32     FdInputStream::FdInputStream(FILE* tmpfl)
  33         : m_tmpfl(tmpfl ? tmpfl : tmpfile())
  34     {
  35         fseek(m_tmpfl,0,SEEK_END);
  36         long pos = ftell(m_tmpfl);
  37         rewind(m_tmpfl);
  38         m_nLength = sal_Int64(pos);
  39     }
  40
  41
  42
  43     FdInputStream::~FdInputStream()
  44     {
  45         if ( 0 != m_tmpfl)
  46             fclose(m_tmpfl);
  47     }
  48
  49
  50     Any SAL_CALL FdInputStream::queryInterface(
  51         const Type& rType
  52     )
  53         throw(
  54             RuntimeException
  55         )
  56     {
  57         Any aRet = ::cppu::queryInterface(rType,
  58                                           (static_cast< XInputStream* >(this)),
  59                                           (static_cast< XSeekable* >(this)) );
  60
  61         return aRet.hasValue() ? aRet : OWeakObject::queryInterface( rType );
  62     }
  63
  64
  65     void SAL_CALL FdInputStream::acquire( void ) throw() {
  66         OWeakObject::acquire();
  67     }
  68
  69     void SAL_CALL FdInputStream::release( void ) throw() {
  70         OWeakObject::release();
  71     }
  72
  73
  74     sal_Int32 SAL_CALL FdInputStream::readBytes(Sequence< sal_Int8 >& aData,
  75                                                  sal_Int32 nBytesToRead)
  76         throw(NotConnectedException,
  77               BufferSizeExceededException,
  78               IOException,
  79               RuntimeException)
  80     {
  81         osl::MutexGuard aGuard(m_aMutex);
  82
  83         if(0 <= nBytesToRead && aData.getLength() < nBytesToRead)
  84             aData.realloc(nBytesToRead);
  85
  86         size_t nWanted = static_cast<size_t>(nBytesToRead);
  87         size_t nRead = fread(aData.getArray(), 1, nWanted, m_tmpfl);
  88         if (nRead != nWanted && ferror(m_tmpfl))
  89             throw IOException();
  90
  91         return static_cast<sal_Int32>(nRead);
  92     }
  93
  94
  95     sal_Int32 SAL_CALL FdInputStream::readSomeBytes( Sequence< sal_Int8 >& aData,
  96                                                       sal_Int32 nMaxBytesToRead )
  97         throw( NotConnectedException,
  98                BufferSizeExceededException,
  99                IOException,
 100                RuntimeException)
 101     {
 102         return readBytes(aData,nMaxBytesToRead);
 103     }
 104
 105
 106
 107     void SAL_CALL FdInputStream::skipBytes(sal_Int32 nBytesToSkip)
 108         throw(NotConnectedException,
 109               BufferSizeExceededException,
 110               IOException,
 111               RuntimeException)
 112     {
 113         osl::MutexGuard aGuard(m_aMutex);
 114         if(!m_tmpfl)
 115             throw IOException();
 116
 117         fseek(m_tmpfl,long(nBytesToSkip),SEEK_CUR);
 118     }
 119
 120
 121
 122     sal_Int32 SAL_CALL FdInputStream::available(void)
 123         throw(NotConnectedException,
 124               IOException,
 125               RuntimeException)
 126     {
 127         return sal::static_int_cast<sal_Int32>(m_nLength - getPosition());
 128     }
 129
 130
 131
 132     void SAL_CALL FdInputStream::closeInput(void)
 133         throw(NotConnectedException,
 134               IOException,
 135               RuntimeException)
 136     {
 137         osl::MutexGuard aGuard(m_aMutex);
 138         if(m_tmpfl)
 139             fclose(m_tmpfl),m_tmpfl = 0;
 140     }
 141
 142
 143
 144     void SAL_CALL FdInputStream::seek(sal_Int64 location)
 145         throw( IllegalArgumentException,
 146                IOException,
 147                RuntimeException )
 148     {
 149         osl::MutexGuard aGuard(m_aMutex);
 150         if(!m_tmpfl)
 151             throw IOException();
 152
 153         fseek(m_tmpfl,long(location),SEEK_SET);
 154     }
 155
 156
 157
 158     sal_Int64 SAL_CALL
 159     FdInputStream::getPosition(
 160         void )
 161         throw( IOException,
 162                RuntimeException )
 163     {
 164         osl::MutexGuard aGuard(m_aMutex);
 165         if(!m_tmpfl)
 166             throw IOException();
 167
 168     //     fpos_t pos;
 169     //     fgetpos(m_tmpfl,&pos);
 170         long pos;
 171         pos = ftell(m_tmpfl);
 172         return sal_Int64(pos);
 173     }
 174
 175
 176
 177     sal_Int64 SAL_CALL FdInputStream::getLength(
 178         void
 179     ) throw(
 180         IOException,RuntimeException
 181     )
 182     {
 183         return m_nLength;
 184     }
 185 }
 186
 187 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */