binary_i_file.cpp

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/** @file
 *  @author Bram de Greve (bram@cocamware.com)
 *  @author Tom De Muer (tom@cocamware.com)
 *
 *  *** BEGIN LICENSE INFORMATION ***
 *  
 *  The contents of this file are subject to the Common Public Attribution License 
 *  Version 1.0 (the "License"); you may not use this file except in compliance with 
 *  the License. You may obtain a copy of the License at 
 *  http://lass.sourceforge.net/cpal-license. The License is based on the 
 *  Mozilla Public License Version 1.1 but Sections 14 and 15 have been added to cover 
 *  use of software over a computer network and provide for limited attribution for 
 *  the Original Developer. In addition, Exhibit A has been modified to be consistent 
 *  with Exhibit B.
 *  
 *  Software distributed under the License is distributed on an "AS IS" basis, WITHOUT 
 *  WARRANTY OF ANY KIND, either express or implied. See the License for the specific 
 *  language governing rights and limitations under the License.
 *  
 *  The Original Code is LASS - Library of Assembled Shared Sources.
 *  
 *  The Initial Developer of the Original Code is Bram de Greve and Tom De Muer.
 *  The Original Developer is the Initial Developer.
 *  
 *  All portions of the code written by the Initial Developer are:
 *  Copyright (C) 2004-2024 the Initial Developer.
 *  All Rights Reserved.
 *  
 *  Contributor(s):
 *
 *  Alternatively, the contents of this file may be used under the terms of the 
 *  GNU General Public License Version 2 or later (the GPL), in which case the 
 *  provisions of GPL are applicable instead of those above.  If you wish to allow use
 *  of your version of this file only under the terms of the GPL and not to allow 
 *  others to use your version of this file under the CPAL, indicate your decision by 
 *  deleting the provisions above and replace them with the notice and other 
 *  provisions required by the GPL License. If you do not delete the provisions above,
 *  a recipient may use your version of this file under either the CPAL or the GPL.
 *  
 *  *** END LICENSE INFORMATION ***
 */
 
#include "lass_common.h"
#include "binary_i_file.h"
#include "../meta/meta_assert.h"
#include <stdio.h>
 
#if LASS_PLATFORM_TYPE == LASS_PLATFORM_TYPE_WIN32
#   pragma warning(disable: 4996) // 'fopen': This function or variable may be unsafe
#endif
 
namespace lass
{
 
namespace io
{
 
/** Construct an "empty" closed stream..
 */
BinaryIFile::BinaryIFile():
    BinaryIStream(),
    file_(0)
{
}
 
 
 
/** Construct stream by filename and open it.
 */
BinaryIFile::BinaryIFile(const char* path):
    BinaryIStream(),
    file_(0)
{
    open(path);
}
 
 
 
/** Construct stream by filename and open it.
 */
BinaryIFile::BinaryIFile(const std::string& path):
    BinaryIStream(),
    file_(0)
{
    open(path);
}
 
 
 
#if LASS_HAVE_WCHAR_SUPPORT
 
/** Construct stream by filename and open it.
 */
BinaryIFile::BinaryIFile(const wchar_t* path):
    BinaryIStream(),
    file_(0)
{
    open(path);
}
 
 
 
/** Construct stream by filename and open it.
 */
BinaryIFile::BinaryIFile(const std::wstring& path):
    BinaryIStream(),
    file_(0)
{
    open(path);
}
 
#endif
 
 
 
#if LASS_HAVE_STD_FILESYSTEM
 
/** Construct stream by filename and open it.
 */
BinaryIFile::BinaryIFile(const std::filesystem::path& path):
    BinaryIStream(),
    file_(0)
{
    open(path);
}
 
#endif
 
 
 
/** Close stream on destruction.
 */
BinaryIFile::~BinaryIFile()
{
    close();
}
 
 
 
void BinaryIFile::open(const char* path)
{
#if LASS_HAVE_WCHAR_SUPPORT && LASS_HAVE_WFOPEN
    open(util::utf8ToWchar(path));
#else
    close();
    file_ = ::fopen(path, "rb");
    if (!file_)
    {
        setstate(std::ios_base::failbit);
    }
#endif
}
 
 
 
void BinaryIFile::open(const std::string& path)
{
    open(path.c_str());
}
 
 
 
#if LASS_HAVE_WCHAR_SUPPORT
 
void BinaryIFile::open(const wchar_t* path)
{
#   if LASS_HAVE_WFOPEN
    close();
    file_ = ::_wfopen(path, L"rb");
    if (!file_)
    {
        setstate(std::ios_base::failbit);
    }
#   else
    open(util::wcharToUtf8(path));
#   endif
}
 
 
 
void BinaryIFile::open(const std::wstring& path)
{
    open(path.c_str());
}
 
#endif
 
 
 
#if LASS_HAVE_STD_FILESYSTEM
 
void BinaryIFile::open(const std::filesystem::path& path)
{
    close();
    if (good())
    {
#if LASS_HAVE_WFOPEN
        file_ = ::_wfopen(path.c_str(), L"rb");
#else
        file_ = ::fopen(path.c_str(), "rb");
#endif
        if (!file_)
        {
            setstate(std::ios_base::failbit);
        }
    }
}
 
#endif
 
 
 
void BinaryIFile::close()
{
    if (is_open())
    {
        const int result = ::fclose( file_ );
        if (result != 0)
        {
            setstate(std::ios_base::failbit);
        }
        file_ = 0;
    }
}
 
bool BinaryIFile::is_open() const
{
    return file_ != 0;
}
 
 
 
// --- private -------------------------------------------------------------------------------------
 
BinaryIFile::pos_type BinaryIFile::doTellg() const
{
#if LASS_COMPILER_TYPE == LASS_COMPILER_TYPE_MSVC && LASS_ADDRESS_SIZE == 64
    const off_type pos = ::_ftelli64(file_);
#else
    const off_type pos = ::ftell(file_);
#endif
    return static_cast<pos_type>(pos >= 0 ? pos : -1);
}
 
 
 
void BinaryIFile::doSeekg(pos_type position)
{
    if (position > num::NumTraits<off_type>::max)
    {
        setstate(std::ios_base::failbit);
        return;
    }
    doSeekg(static_cast<off_type>(position), std::ios_base::beg);
}
 
 
 
void BinaryIFile::doSeekg(off_type offset, std::ios_base::seekdir direction)
{
#if LASS_COMPILER_TYPE == LASS_COMPILER_TYPE_MSVC && LASS_ADDRESS_SIZE == 64
    const int result = ::_fseeki64(file_, offset, impl::seekdir2stdio(direction));
#else
    const int result = ::fseek(file_, offset, impl::seekdir2stdio(direction));
#endif
    if (result != 0)
    {
        setstate(std::ios_base::failbit);
    }
}
 
 
 
size_t BinaryIFile::doRead(void* output, size_t numberOfBytes)
{
    if (!file_)
    {
        setstate(std::ios_base::failbit);
        return 0;
    }
    if (!good())
    {
        return 0;
    }
    const size_t bytesRead = ::fread(output, 1, numberOfBytes, file_);
    if (bytesRead != numberOfBytes)
    {
        setstate(std::ios_base::eofbit);
    }
    return bytesRead;
}
 
 
 
}
 
}