root/shell/FileInputStream.cpp

DEFINITIONS

1. valid
2. seek
3. available
4. read

/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
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 * The Original Code is [Open Source Virtual Machine.].
 *
 * The Initial Developer of the Original Code is
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 * the Initial Developer. All Rights Reserved.
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#include "avmshell.h"

namespace avmshell
{
        FileInputStream::FileInputStream(const char *filename)
        {
                file = Platform::GetInstance()->createFile();
                if(file)
                {
                        if(file->open(filename, File::OPEN_READ_BINARY))
                        {
                                len = file->size();
                        }
                        else
                        {
                                Platform::GetInstance()->destroyFile(file);
                                file = NULL;
                        }
                }
        }

        bool FileInputStream::valid() const
        {
                return file != NULL;
        }

        FileInputStream::~FileInputStream()
        {
                Platform::GetInstance()->destroyFile(file);
        }

        void FileInputStream::seek(int64_t offset)
        {
                file->setPosition(offset);
        }
        
        int64_t FileInputStream::available()
        {
                int64_t pos = file->getPosition();
                if(pos >= 0 )
                {
                        return len - pos;
                }
                return 0;
        }

        size_t FileInputStream::read(void *buffer,
                                                          size_t count)
        {
                return file->read(buffer, count);
        }
}