opencv/3rdparty/openexr/IlmImf/ImfStdIO.cpp
Alexander Alekhin 878af7ada8
Merge pull request from alalek:update_openexr_2.3.0
3rdparty: update OpenEXR 2.3.0 ()

* openexr 2.2.1

* openexr 2.3.0

* openexr: build fixes

* openexr: build dwa tables on-demand
2019-06-10 20:04:23 +03:00

275 lines
5.5 KiB
C++

///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2004, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Industrial Light & Magic nor the names of
// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.67
//
///////////////////////////////////////////////////////////////////////////
//-----------------------------------------------------------------------------
//
// Low-level file input and output for OpenEXR
// based on C++ standard iostreams.
//
//-----------------------------------------------------------------------------
#include <ImfStdIO.h>
#include "Iex.h"
#include <errno.h>
#ifdef _MSC_VER
# define VC_EXTRALEAN
# include <Windows.h>
# include <string.h>
#endif
using namespace std;
#include "ImfNamespace.h"
OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_ENTER
namespace {
#ifdef _MSC_VER
std::wstring WidenFilename (const char *filename)
{
std::wstring ret;
int fnlen = static_cast<int>( strlen(filename) );
int len = MultiByteToWideChar(CP_UTF8, 0, filename, fnlen, NULL, 0 );
if (len > 0)
{
ret.resize(len);
MultiByteToWideChar(CP_UTF8, 0, filename, fnlen, &ret[0], len);
}
return ret;
}
#endif
void
clearError ()
{
errno = 0;
}
bool
checkError (istream &is, streamsize expected = 0)
{
if (!is)
{
if (errno)
IEX_NAMESPACE::throwErrnoExc();
if (is.gcount() < expected)
{
THROW (IEX_NAMESPACE::InputExc, "Early end of file: read " << is.gcount()
<< " out of " << expected << " requested bytes.");
}
return false;
}
return true;
}
void
checkError (ostream &os)
{
if (!os)
{
if (errno)
IEX_NAMESPACE::throwErrnoExc();
throw IEX_NAMESPACE::ErrnoExc ("File output failed.");
}
}
} // namespace
StdIFStream::StdIFStream (const char fileName[]):
OPENEXR_IMF_INTERNAL_NAMESPACE::IStream (fileName),
_is (new ifstream (
#ifdef _MSC_VER
WidenFilename(fileName).c_str(),
#else
fileName,
#endif
ios_base::binary)),
_deleteStream (true)
{
if (!*_is)
{
delete _is;
IEX_NAMESPACE::throwErrnoExc();
}
}
StdIFStream::StdIFStream (ifstream &is, const char fileName[]):
OPENEXR_IMF_INTERNAL_NAMESPACE::IStream (fileName),
_is (&is),
_deleteStream (false)
{
// empty
}
StdIFStream::~StdIFStream ()
{
if (_deleteStream)
delete _is;
}
bool
StdIFStream::read (char c[/*n*/], int n)
{
if (!*_is)
throw IEX_NAMESPACE::InputExc ("Unexpected end of file.");
clearError();
_is->read (c, n);
return checkError (*_is, n);
}
Int64
StdIFStream::tellg ()
{
return std::streamoff (_is->tellg());
}
void
StdIFStream::seekg (Int64 pos)
{
_is->seekg (pos);
checkError (*_is);
}
void
StdIFStream::clear ()
{
_is->clear();
}
StdOFStream::StdOFStream (const char fileName[]):
OPENEXR_IMF_INTERNAL_NAMESPACE::OStream (fileName),
_os (new ofstream (
#ifdef _MSC_VER
WidenFilename(fileName).c_str(),
#else
fileName,
#endif
ios_base::binary)),
_deleteStream (true)
{
if (!*_os)
{
delete _os;
IEX_NAMESPACE::throwErrnoExc();
}
}
StdOFStream::StdOFStream (ofstream &os, const char fileName[]):
OPENEXR_IMF_INTERNAL_NAMESPACE::OStream (fileName),
_os (&os),
_deleteStream (false)
{
// empty
}
StdOFStream::~StdOFStream ()
{
if (_deleteStream)
delete _os;
}
void
StdOFStream::write (const char c[/*n*/], int n)
{
clearError();
_os->write (c, n);
checkError (*_os);
}
Int64
StdOFStream::tellp ()
{
return std::streamoff (_os->tellp());
}
void
StdOFStream::seekp (Int64 pos)
{
_os->seekp (pos);
checkError (*_os);
}
StdOSStream::StdOSStream (): OPENEXR_IMF_INTERNAL_NAMESPACE::OStream ("(string)")
{
// empty
}
void
StdOSStream::write (const char c[/*n*/], int n)
{
clearError();
_os.write (c, n);
checkError (_os);
}
Int64
StdOSStream::tellp ()
{
return std::streamoff (_os.tellp());
}
void
StdOSStream::seekp (Int64 pos)
{
_os.seekp (pos);
checkError (_os);
}
OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_EXIT