shell/FileInputStream.cpp

   1 /* -*- Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 4 -*- */
   2 /* vi: set ts=4 sw=4 expandtab: (add to ~/.vimrc: set modeline modelines=5) */
   3 /* ***** BEGIN LICENSE BLOCK *****
   4  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   5  *
   6  * The contents of this file are subject to the Mozilla Public License Version
   7  * 1.1 (the "License"); you may not use this file except in compliance with
   8  * the License. You may obtain a copy of the License at
   9  * http://www.mozilla.org/MPL/
  10  *
  11  * Software distributed under the License is distributed on an "AS IS" basis,
  12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  13  * for the specific language governing rights and limitations under the
  14  * License.
  15  *
  16  * The Original Code is [Open Source Virtual Machine.].
  17  *
  18  * The Initial Developer of the Original Code is
  19  * Adobe System Incorporated.
  20  * Portions created by the Initial Developer are Copyright (C) 2004-2006
  21  * the Initial Developer. All Rights Reserved.
  22  *
  23  * Contributor(s):
  24  *   Adobe AS3 Team
  25  *
  26  * Alternatively, the contents of this file may be used under the terms of
  27  * either the GNU General Public License Version 2 or later (the "GPL"), or
  28  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  29  * in which case the provisions of the GPL or the LGPL are applicable instead
  30  * of those above. If you wish to allow use of your version of this file only
  31  * under the terms of either the GPL or the LGPL, and not to allow others to
  32  * use your version of this file under the terms of the MPL, indicate your
  33  * decision by deleting the provisions above and replace them with the notice
  34  * and other provisions required by the GPL or the LGPL. If you do not delete
  35  * the provisions above, a recipient may use your version of this file under
  36  * the terms of any one of the MPL, the GPL or the LGPL.
  37  *
  38  * ***** END LICENSE BLOCK ***** */
  39
  40 #include "avmshell.h"
  41
  42 namespace avmshell
  43 {
  44     FileInputStream::FileInputStream(const char *filename)
  45     {
  46         file = Platform::GetInstance()->createFile();
  47         if(file)
  48         {
  49             if(file->open(filename, File::OPEN_READ_BINARY))
  50             {
  51                 len = file->size();
  52             }
  53             else
  54             {
  55                 Platform::GetInstance()->destroyFile(file);
  56                 file = NULL;
  57             }
  58         }
  59     }
  60
  61     bool FileInputStream::valid() const
  62     {
  63         return file != NULL;
  64     }
  65
  66     FileInputStream::~FileInputStream()
  67     {
  68         Platform::GetInstance()->destroyFile(file);
  69     }
  70
  71     void FileInputStream::seek(int64_t offset)
  72     {
  73         file->setPosition(offset);
  74     }
  75
  76     int64_t FileInputStream::available()
  77     {
  78         int64_t pos = file->getPosition();
  79         if(pos >= 0 )
  80         {
  81             return len - pos;
  82         }
  83         return 0;
  84     }
  85
  86     size_t FileInputStream::read(void *buffer,
  87                               size_t count)
  88     {
  89         return file->read(buffer, count);
  90     }
  91 }