/////////////////////////////////////////////////////////////////////////// // // 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> using namespace std; namespace Imf { namespace { void clearError () { errno = 0; } bool checkError (istream &is, streamsize expected = 0) { if (!is) { if (errno) Iex::throwErrnoExc(); if (is.gcount() < expected) { THROW (Iex::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::throwErrnoExc(); throw Iex::ErrnoExc ("File output failed."); } } } // namespace StdIFStream::StdIFStream (const char fileName[]): IStream (fileName), _is (new ifstream (fileName, ios_base::binary)), _deleteStream (true) { if (!*_is) { delete _is; Iex::throwErrnoExc(); } } StdIFStream::StdIFStream (ifstream &is, const char fileName[]): 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::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[]): OStream (fileName), _os (new ofstream (fileName, ios_base::binary)), _deleteStream (true) { if (!*_os) { delete _os; Iex::throwErrnoExc(); } } StdOFStream::StdOFStream (ofstream &os, const char fileName[]): 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 (): 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); } } // namespace Imf