shell/source/win32/shlxthandler/ooofilt/stream_helper.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
  21 #if defined _MSC_VER
  22 #pragma warning(push, 1)
  23 #endif
  24 #include <windows.h>
  25 #if defined _MSC_VER
  26 #pragma warning(pop)
  27 #endif
  28
  29 #include <stdio.h>
  30 #include <objidl.h>
  31 #include "internal/stream_helper.hxx"
  32
  33 BufferStream::BufferStream(IStream *str) :
  34     stream(str)
  35 {
  36     // These next few lines work around the "Seek pointer" bug found on Vista.
  37     char cBuf[20];
  38     unsigned long nCount;
  39     ULARGE_INTEGER nNewPosition;
  40     LARGE_INTEGER nMove;
  41     nMove.QuadPart = 0;
  42     stream->Seek( nMove, STREAM_SEEK_SET, &nNewPosition );
  43     stream->Read( cBuf, 20, &nCount );
  44 }
  45
  46 BufferStream::~BufferStream()
  47 {
  48 }
  49
  50 unsigned long BufferStream::sread (unsigned char *buf, unsigned long size)
  51 {
  52     unsigned long newsize;
  53     HRESULT hr;
  54
  55     hr = stream->Read (buf, size, &newsize);
  56     if (hr == S_OK)
  57         return (unsigned long)newsize;
  58     else
  59         return (unsigned long)0;
  60 }
  61
  62 long BufferStream::stell ()
  63 {
  64     HRESULT hr;
  65     LARGE_INTEGER Move;
  66     ULARGE_INTEGER NewPosition;
  67     Move.QuadPart = 0;
  68     NewPosition.QuadPart = 0;
  69
  70     hr = ((IStream *)stream)->Seek (Move, STREAM_SEEK_CUR, &NewPosition);
  71     if (hr == S_OK)
  72         return (long) NewPosition.QuadPart;
  73     else
  74         return -1;
  75 }
  76
  77 long BufferStream::sseek (long offset, int origin)
  78 {
  79     HRESULT hr;
  80     LARGE_INTEGER Move;
  81     DWORD dwOrigin;
  82     Move.QuadPart = (__int64)offset;
  83
  84     switch (origin)
  85     {
  86     case SEEK_CUR:
  87         dwOrigin = STREAM_SEEK_CUR;
  88         break;
  89     case SEEK_END:
  90         dwOrigin = STREAM_SEEK_END;
  91         break;
  92     case SEEK_SET:
  93         dwOrigin = STREAM_SEEK_SET;
  94         break;
  95     default:
  96         return -1;
  97     }
  98
  99     hr = stream->Seek (Move, dwOrigin, NULL);
 100     if (hr == S_OK)
 101         return 0;
 102     else
 103         return -1;
 104 }
 105
 106 FileStream::FileStream(const char *filename) :
 107     file(0)
 108 {
 109     // fdo#67534: avoid locking to not interfere with soffice opening the file
 110     file = _fsopen(filename, "rb", _SH_DENYNO);
 111 }
 112
 113 FileStream::~FileStream()
 114 {
 115     if (file)
 116         fclose(file);
 117 }
 118
 119 unsigned long FileStream::sread (unsigned char *buf, unsigned long size)
 120 {
 121     if (file)
 122         return static_cast<unsigned long>(fread(buf, 1, size, file));
 123     return 0;
 124 }
 125
 126 long FileStream::stell ()
 127 {
 128     if (file)
 129         return ftell(file);
 130     return -1L;
 131 }
 132
 133 long FileStream::sseek (long offset, int origin)
 134 {
 135     if (file)
 136         return fseek(file, offset, origin);
 137     return -1L;
 138 }
 139
 140 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */