// -*- mode: c++; c-basic-offset:4 -*-

// This file is part of libdap, A C++ implementation of the OPeNDAP Data

// Access Protocol.

// Copyright (c) 2002,2003 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.

// (c) COPYRIGHT URI/MIT 1994-1999

// Please read the full copyright statement in the file COPYRIGHT_URI.

//

// Authors:

//      jhrg,jimg       James Gallagher <jgallagher@gso.uri.edu>

// Implementation for Float64.

//

// jhrg 9/7/94

#include "config.h"

//#define DODS_DEBUG

#include <sstream>

#include <iomanip>

#include "Byte.h"           // synonymous with UInt8 and Char

#include "Int8.h"

#include "Int16.h"

#include "UInt16.h"

#include "Int32.h"

#include "UInt32.h"

#include "Int64.h"

#include "UInt64.h"

#include "Float32.h"

#include "Float64.h"

#include "Str.h"

#include "Url.h"

#include "DDS.h"

#include "Marshaller.h"

#include "UnMarshaller.h"

#include "DMR.h"

#include "D4StreamMarshaller.h"

#include "D4StreamUnMarshaller.h"

#include "util.h"

#include "parser.h"

#include "Operators.h"

#include "dods-limits.h"

#include "InternalErr.h"

using std::cerr;

using std::endl;

namespace libdap {

/** The Float64 constructor requires only the name of the variable

    to be created.  The name may be omitted, which will create a

    nameless variable.  This may be adequate for some applications.

    @param n A string containing the name of the variable to be

    created.

*/

Float64::Float64(const string &n) : BaseType(n, dods_float64_c), d_buf(0)

{}

/** The Float64 server-side constructor accepts the name of the variable and

    the dataset name from which this instance is created.

    @param n A string containing the name of the variable to be created.

    @param d A string containing the name of the dataset from which this

    variable is created

*/

Float64::Float64(const string &n, const string &d) : BaseType(n, d, dods_float64_c), d_buf(0)

{}

Float64::Float64(const Float64 &copy_from) : BaseType(copy_from)

{

    d_buf = copy_from.d_buf;

}

BaseType *

Float64::ptr_duplicate()

{

    return new Float64(*this);

}

Float64 &

Float64::operator=(const Float64 &rhs)

{

    if (this == &rhs)

        return *this;

    dynamic_cast<BaseType &>(*this) = rhs;

    d_buf = rhs.d_buf;

    return *this;

}

unsigned int

Float64::width(bool) const

{

    return sizeof(dods_float64);

}

bool

Float64::serialize(ConstraintEvaluator &eval, DDS &dds, Marshaller &m, bool ce_eval)

{

#if USE_LOCAL_TIMEOUT_SCHEME

    dds.timeout_on();

#endif

    if (!read_p())

        read();  // read() throws Error and InternalErr

    if (ce_eval && !eval.eval_selection(dds, dataset()))

        return true;

#if USE_LOCAL_TIMEOUT_SCHEME

    dds.timeout_off();

#endif

    m.put_float64( d_buf ) ;

    return true;

}

bool

Float64::deserialize(UnMarshaller &um, DDS *, bool)

{

    um.get_float64( d_buf ) ;

    return false;

}

void

Float64::compute_checksum(Crc32 &checksum)

{

	checksum.AddData(reinterpret_cast<uint8_t*>(&d_buf), sizeof(d_buf));

}

/**

 * @brief Serialize an Int8

 * @param m

 * @param dmr Unused

 * @param eval Unused

 * @param filter Unused

 * @exception Error is thrown if the value needs to be read and that operation fails.

 */

void

Float64::serialize(D4StreamMarshaller &m, DMR &, /*ConstraintEvaluator &,*/ bool)

{

    if (!read_p())

        read();          // read() throws Error

    m.put_float64( d_buf ) ;

}

void

Float64::deserialize(D4StreamUnMarshaller &um, DMR &)

{

    um.get_float64( d_buf ) ;

}

unsigned int

Float64::val2buf(void *val, bool)

{

    // Jose Garcia

    // This method is public therefore and I believe it has being designed

    // to be use by read which must be implemented on the surrogated library,

    // thus if the pointer val is NULL, is an Internal Error.

    if (!val)

        throw InternalErr(__FILE__, __LINE__,

                          "The incoming pointer does not contain any data.");

    d_buf = *(dods_float64 *)val;

    return width();

}

unsigned int

Float64::buf2val(void **val)

{

    // Jose Garcia

    // The same comment justifying throwing an Error in val2buf applies here.

    if (!val)

        throw InternalErr(__FILE__, __LINE__, "NULL pointer.");

    if (!*val)

        *val = new dods_float64;

    *(dods_float64 *)*val = d_buf;

    return width();

}

/** Return the value of the Float64 held by this instance. This is more

    convenient than the general interface provided by buf2val, but its use

    requires a downcase from BaseType to Float64.

    @return The dods_float32 value. */

dods_float64

Float64::value() const

{

    return d_buf;

}

bool

Float64::set_value(dods_float64 val)

{

    d_buf = val;

    set_read_p(true);

    return true;

}

void

Float64::print_val(FILE *out, string space, bool print_decl_p)

{

    ostringstream oss;

    print_val(oss, space, print_decl_p);

    fwrite(oss.str().data(), sizeof(char), oss.str().length(), out);

}

void

Float64::print_val(ostream &out, string space, bool print_decl_p)

{

    // Set the precision to 15 digits

    std::streamsize prec = out.precision(15);

    if (print_decl_p) {

        print_decl(out, space, false);

        out << " = " << d_buf << ";\n";

    }

    else

        out << d_buf;

    // reset the precision

    out.precision(prec);

}

bool

Float64::ops(BaseType *b, int op)

{

    // Extract the Byte arg's value.

    if (!read_p() && !read()) {

        // Jose Garcia

        // Since the read method is virtual and implemented outside

        // libdap++ if we cannot read the data that is the problem

        // of the user or of whoever wrote the surrogate library

        // implemeting read therefore it is an internal error.

        throw InternalErr(__FILE__, __LINE__, "This value not read!");

    }

    // Extract the second arg's value.

    if (!b->read_p() && !b->read()) {

        // Jose Garcia

        // Since the read method is virtual and implemented outside

        // libdap++ if we cannot read the data that is the problem

        // of the user or of whoever wrote the surrogate library

        // implemeting read therefore it is an internal error.

        throw InternalErr(__FILE__, __LINE__, "This value not read!");

    }

    return d4_ops(b, op);

}

bool

Float64::d4_ops(BaseType *b, int op)

{

    DBG(cerr << "b->typename(): " << b->type_name() << endl);

    switch (b->type()) {

        case dods_int8_c:

            return Cmp<dods_float64, dods_int8>(op, d_buf, static_cast<Int8*>(b)->value());

        case dods_byte_c:

            return SUCmp<dods_float64, dods_byte>(op, d_buf, static_cast<Byte*>(b)->value());

        case dods_int16_c:

            return Cmp<dods_float64, dods_int16>(op, d_buf, static_cast<Int16*>(b)->value());

        case dods_uint16_c:

            return SUCmp<dods_float64, dods_uint16>(op, d_buf, static_cast<UInt16*>(b)->value());

        case dods_int32_c:

            return Cmp<dods_float64, dods_int32>(op, d_buf, static_cast<Int32*>(b)->value());

        case dods_uint32_c:

            return SUCmp<dods_float64, dods_uint32>(op, d_buf, static_cast<UInt32*>(b)->value());

        case dods_int64_c:

            return Cmp<dods_float64, dods_int64>(op, d_buf, static_cast<Int64*>(b)->value());

        case dods_uint64_c:

            return SUCmp<dods_float64, dods_uint64>(op, d_buf, static_cast<UInt64*>(b)->value());

        case dods_float32_c:

            // Note that this code casts the double (dods_float64) to a float because when

            // real numbers are approximated using float or double, errors are larger in the float

            // case, making <= and == operators fail. By casting to the smaller type, the

            // same values have the same error and we can avoid using a range compare and a

            // delta value.

            return Cmp<dods_float32, dods_float32>(op, (float)d_buf, static_cast<Float32*>(b)->value());

        case dods_float64_c:

            return Cmp<dods_float64, dods_float64>(op, d_buf, static_cast<Float64*>(b)->value());

        case dods_str_c:

        case dods_url_c:

            throw Error(malformed_expr, "Relational operators can only compare compatible types (number, string).");

        default:

            throw Error(malformed_expr, "Relational operators only work with scalar types.");

    }

}

/** @brief dumps information about this object

 *

 * Displays the pointer value of this instance and information about this

 * instance.

 *

 * @param strm C++ i/o stream to dump the information to

 * @return void

 */

void

Float64::dump(ostream &strm) const

{

    strm << DapIndent::LMarg << "Float64::dump - ("

    << (void *)this << ")" << endl ;

    DapIndent::Indent() ;

    BaseType::dump(strm) ;

    strm << DapIndent::LMarg << "value: " << d_buf << endl ;

    DapIndent::UnIndent() ;

}

} // namespace libdap