DmrppStr.cc

 
// -*- mode: c++; c-basic-offset:4 -*-
 
// This file is part of the BES
 
// Copyright (c) 2016 OPeNDAP, Inc.
// Author: James Gallagher <jgallagher@opendap.org>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//
// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
 
#include "config.h"
 
#include <string>
 
#include "BESError.h"
#include "BESInternalError.h"
#include "BESDebug.h"
 
#include "Chunk.h"
#include "DmrppStr.h"
 
using namespace libdap;
using namespace std;
 
namespace dmrpp {
 
DmrppStr &
DmrppStr::operator=(const DmrppStr &rhs)
{
    if (this == &rhs)
    return *this;
 
    dynamic_cast<Str &>(*this) = rhs; // run Constructor=
 
    dynamic_cast<DmrppCommon &>(*this) = rhs;
    //DmrppCommon::m_duplicate_common(rhs);
 
    return *this;
}
 
bool
DmrppStr::read()
{
    if (!get_chunks_loaded())
        load_chunks(this);
 
    if (read_p())
        return true;
 
    // The following replaces a call to DmrppCommon::read_atomic() because the
    // string code requires special processing of the data array and requires information
    // about the chunk size to produce correct answers.
 
    if (get_chunks_size() != 1)
        throw BESInternalError(string("Expected only a single chunk for variable ") + name(), __FILE__, __LINE__);
 
    auto chunk = get_immutable_chunks()[0];
    chunk->read_chunk();
    auto chunk_size= chunk->get_size();
    char *data = chunk->get_rbuf();
 
    // It is possible that the string data is not null terminated and/or
    // Does not span the full width of the chunk.
    // This should correct those issues.
    unsigned long long str_len=0;
    bool done = false;
    while(!done){
        done = (str_len >= chunk_size) || (data[str_len] == 0);
        if(!done) str_len++;
    }
    string value(data,str_len);
    set_value(value);   // sets read_p too
    return true;
}
 
void
DmrppStr::set_send_p(bool state)
{
    if (!get_attributes_loaded())
        load_attributes(this);
 
    Str::set_send_p(state);
}
 
void DmrppStr::dump(ostream & strm) const
{
    strm << BESIndent::LMarg << "DmrppStr::dump - (" << (void *) this << ")" << endl;
    BESIndent::Indent();
    DmrppCommon::dump(strm);
    Str::dump(strm);
    strm << BESIndent::LMarg << "value:    " << d_buf << endl;
    BESIndent::UnIndent();
}
 
} // namespace dmrpp