// Copyright (c) 2014-2015, Pacific Biosciences of California, Inc.
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted (subject to the limitations in the
// disclaimer below) 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.
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//  * Neither the name of Pacific Biosciences nor the names of its
//    contributors may be used to endorse or promote products derived
//    from this software without specific prior written permission.
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// GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY PACIFIC
// BIOSCIENCES AND ITS CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
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// Author: Derek Barnett

#include "FileProducer.h"
#include <exception>
#include <cstdio>
using namespace PacBio;
using namespace PacBio::BAM;
using namespace PacBio::BAM::internal;
using namespace std;

FileProducer::FileProducer(const string& targetFilename)
    : FileProducer(targetFilename, targetFilename + ".tmp")
{ }

FileProducer::FileProducer(const string& targetFilename,
                           const string& tempFilename)
    : targetFilename_(targetFilename)
    , tempFilename_(tempFilename)
{
    // override renaming if writing to stdout
    //
    // setting temp filename to '-' keeps consistent interfaces
    // for derived classes to actually operate on temp filename
    if (targetFilename_ == "-")
        tempFilename_ = "-";
}

FileProducer::~FileProducer(void)
{
    // skip renaming if there is a 'live' exception
    // or if writing to stdout
    if ((std::current_exception() == nullptr) && (tempFilename_ != "-")) {
        std::rename(tempFilename_.c_str(),
                    targetFilename_.c_str());
    }
}
