Channel.cc

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/*
 * LSST Data Management System
 * Copyright 2017 AURA/LSST.
 *
 * This product includes software developed by the
 * LSST Project (http://www.lsst.org/).
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the LSST License Statement and
 * the GNU General Public License along with this program.  If not,
 * see <https://www.lsstcorp.org/LegalNotices/>.
 */

#include "astshim/base.h"
#include "astshim/KeyMap.h"
#include "astshim/Object.h"
#include "astshim/Stream.h"
#include "astshim/Channel.h"

namespace ast {

Channel::Channel(Stream &stream, std::string const &options)
        : Channel(astChannel(detail::source, detail::sink, "%s", options.c_str()), stream) {}

Channel::Channel(AstChannel *chan, Stream &stream, bool isFits)
        : Object(reinterpret_cast<AstObject *>(chan)), _stream(stream) {
    astPutChannelData(getRawPtr(), &_stream);
    _stream.setIsFits(isFits);
    assertOK();
}

Channel::Channel(AstChannel *chan) : Object(reinterpret_cast<AstObject *>(chan)), _stream() { assertOK(); }

Channel::~Channel() {
    if (_stream.hasStdStream()) {
        // avoid any attempt to read or write while the stream is being destroyed
        astPutChannelData(getRawPtr(), nullptr);
    }
}

std::shared_ptr<Object> Channel::read() {
    AstObject *rawRet = reinterpret_cast<AstObject *>(astRead(getRawPtr()));
    if (!rawRet) {
        throw std::runtime_error("Could not read an AST object from this channel");
    }
    return Object::fromAstObject<Object>(rawRet, false);
}

int Channel::write(Object const &object) {
    int ret = astWrite(getRawPtr(), object.getRawPtr());
    assertOK();
    return ret;
}

KeyMap Channel::warnings() const {
    AstKeyMap *rawKeyMap =
            reinterpret_cast<AstKeyMap *>(astWarnings(reinterpret_cast<AstChannel const *>(getRawPtr())));
    assertOK();
    return rawKeyMap ? KeyMap(rawKeyMap) : KeyMap();
}

}  // namespace ast