cosv/source/storage/file.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 #define CSV_USE_CSV_ASSERTIONS
  21 #include <cosv/csv_env.hxx>
  22
  23 #include <cosv/comfunc.hxx>
  24 #include <cosv/string.hxx>
  25 #include <cosv/streamstr.hxx>
  26 #include <cosv/std_outp.hxx>
  27 #include <cosv/tpl/dyn.hxx>
  28 #include <cosv/file.hxx>
  29
  30 // NOT FULLY DECLARED SERVICES
  31
  32
  33 namespace csv
  34 {
  35
  36
  37 File::File( const char *    i_sLocation,
  38             uintt           i_nMode )
  39     :   aPath(i_sLocation),
  40         pStream(0),
  41         nMode(i_nMode),
  42         eLastIO(io_none)
  43 {
  44 }
  45
  46 File::File( const String &  i_sLocation,
  47             uintt           i_nMode )
  48     :   aPath(i_sLocation),
  49         pStream(0),
  50         nMode(i_nMode),
  51         eLastIO(io_none)
  52 {
  53 }
  54
  55 File::~File()
  56 {
  57     if ( inq_is_open() )
  58         close();
  59 }
  60
  61 uintt
  62 File::do_read( void *          out_pDest,
  63                uintt           i_nNrofBytes )
  64 {
  65     if ( NOT inq_is_open() )
  66         return 0;
  67
  68     if ( eLastIO == io_write )
  69         ::fseek( pStream, 0, SEEK_CUR );
  70     uintt ret = position();
  71     int iRet= ::fread( out_pDest, 1, i_nNrofBytes, pStream );
  72     if ( iRet < 0  )  {
  73     fprintf(stderr, "warning: read failed in %s line %d \n", __FILE__, __LINE__);
  74     }
  75     ret = position() - ret;
  76
  77     eLastIO = io_read;
  78     return ret;
  79 }
  80
  81 bool
  82 File::inq_eod() const
  83 {
  84     if ( NOT inq_is_open() )
  85         return true;
  86     return feof(pStream) != 0;
  87 }
  88
  89 uintt
  90 File::do_write( const void *    i_pSrc,
  91                 uintt           i_nNrofBytes )
  92 {
  93     if ( NOT inq_is_open() )
  94         return 0;
  95
  96     if ( eLastIO == io_write )
  97         ::fseek( pStream, 0, SEEK_CUR );
  98
  99     uintt ret = ::fwrite( i_pSrc, 1, i_nNrofBytes, pStream );
 100
 101     eLastIO = io_write;
 102     return ret;
 103 }
 104
 105 uintt
 106 File::do_seek( intt     i_nDistance,
 107                seek_dir i_eStartPoint )
 108 {
 109     if ( NOT inq_is_open() )
 110         return uintt(-1);
 111
 112     static int eSearchDir[3] = { SEEK_SET, SEEK_CUR, SEEK_END };
 113
 114     ::fseek( pStream,
 115              intt(i_nDistance),
 116              eSearchDir[i_eStartPoint] );
 117     return position();
 118 }
 119
 120 uintt
 121 File::inq_position() const
 122 {
 123     if ( inq_is_open() )
 124         return uintt( ::ftell(pStream) );
 125     else
 126         return uintt(-1);
 127 }
 128
 129 bool
 130 File::do_open( uintt i_nOpenMode )
 131 {
 132     if ( inq_is_open() )
 133     {
 134         if ( i_nOpenMode == 0 OR i_nOpenMode == nMode )
 135             return true;
 136         close();
 137     }
 138
 139     if ( i_nOpenMode != 0 )
 140         nMode = i_nOpenMode;
 141
 142     const char * sFacadeMode = "";
 143     switch ( nMode )
 144     {
 145          case CFM_RW:        sFacadeMode = "r+b";
 146                             break;
 147          case CFM_CREATE:    sFacadeMode = "w+b";
 148                             break;
 149          case CFM_READ:      sFacadeMode = "rb";
 150                             break;
 151         default:
 152                             sFacadeMode = "rb";
 153     }
 154
 155     pStream = ::fopen( StrPath(), sFacadeMode );
 156     if ( pStream == 0 AND nMode == CFM_RW )
 157     {
 158         sFacadeMode = "w+b";
 159         pStream = ::fopen( StrPath(), sFacadeMode );
 160     }
 161
 162     return pStream != 0;
 163 }
 164
 165 void
 166 File::do_close()
 167 {
 168     if ( inq_is_open() )
 169     {
 170         ::fclose(pStream);
 171         pStream = 0;
 172     }
 173     eLastIO = io_none;
 174 }
 175
 176 bool
 177 File::inq_is_open() const
 178 {
 179     return pStream != 0;
 180 }
 181
 182 const ploc::Path &
 183 File::inq_MyPath() const
 184 {
 185      return aPath;
 186 }
 187
 188
 189 }   // namespace csv
 190
 191 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */