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

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

// Copyright (c) 2012 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 <cassert>
#include <sstream>

#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 "D4StreamMarshaller.h"
#include "D4StreamUnMarshaller.h"

#include "DDS.h"
#include "util.h"
#include "parser.h"
#include "Operators.h"
#include "dods-limits.h"
#include "debug.h"
#include "InternalErr.h"
#include "DapIndent.h"

using std::cerr;
using std::endl;

namespace libdap {

/** The Int8 constructor accepts the name of the variable to be created.

    @note This type is available in DAP4 only.
    See http://docs.opendap.org/index.php/DAP4:_Specification_Volume_1#Atomic_Types

    @param n A string containing the name of the variable to be created.
*/
Int8::Int8(const string &n) : BaseType(n, dods_int8_c, true /*is_dap4*/), d_buf(0)
{}

/** The Int8 server-side constructor accepts the name of the variable and
    the dataset name from which this instance is created. This is a signed
    8-bit integer and was added for DAP4; Byte and UInt8 are unsigned 8-bit
    integers.

    @note This integer type cannot be used with DAP2; it is only present in DAP4.
    See http://docs.opendap.org/index.php/DAP4:_Specification_Volume_1#Atomic_Types.

    @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
*/
Int8::Int8(const string &n, const string &d) : BaseType(n, d, dods_int8_c, true /*is_dap4*/), d_buf(0)
{}

Int8::Int8(const Int8 &copy_from) : BaseType(copy_from)
{
    d_buf = copy_from.d_buf;
}

BaseType *
Int8::ptr_duplicate()
{
    return new Int8(*this);
}

Int8 &
Int8::operator=(const Int8 &rhs)
{
    if (this == &rhs)
        return *this;

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

    d_buf = rhs.d_buf;

    return *this;
}

unsigned int
Int8::width(bool) const
{
    return sizeof(dods_int8);
}

void
Int8::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
Int8::serialize(D4StreamMarshaller &m, DMR &, /*ConstraintEvaluator &,*/ bool)
{
    if (!read_p())
        read();          // read() throws Error

    m.put_int8( d_buf ) ;
}

void
Int8::deserialize(D4StreamUnMarshaller &um, DMR &)
{
    um.get_int8( d_buf ) ;
}

dods_int8
Int8::value() const
{
    return d_buf;
}

bool
Int8::set_value(dods_int8 i)
{
    d_buf = i;
    set_read_p(true);

    return true;
}

void Int8::print_val(ostream &out, string space, bool print_decl_p)
{
	if (print_decl_p) {
		print_decl(out, space, false);
		out << " = " << (int)d_buf << ";\n";
	}
	else
		out << (int)d_buf;
}

bool
Int8::ops(BaseType *b, int op)
{
    // Get the arg's value.
    if (!read_p() && !read())
        throw InternalErr(__FILE__, __LINE__, "This value not read!");

    // Get the second arg's value.
    if (!b || !(b->read_p() || b->read())) 
        throw InternalErr(__FILE__, __LINE__, "This value not read!");

    return d4_ops(b, op);
}

/**
 * @see BaseType::d4_ops(BaseType *, int)
 */
bool Int8::d4_ops(BaseType *b, int op)
{
    switch (b->type()) {
        case dods_int8_c:
            return Cmp<dods_int8, dods_int8>(op, d_buf, static_cast<Int8*>(b)->value());
        case dods_byte_c:
            return Cmp<dods_int8, dods_byte>(op, d_buf, static_cast<Byte*>(b)->value());
        case dods_int16_c:
            return Cmp<dods_int8, dods_int16>(op, d_buf, static_cast<Int16*>(b)->value());
        case dods_uint16_c:
            return Cmp<dods_int8, dods_uint16>(op, d_buf, static_cast<UInt16*>(b)->value());
        case dods_int32_c:
            return Cmp<dods_int8, dods_int32>(op, d_buf, static_cast<Int32*>(b)->value());
        case dods_uint32_c:
            return Cmp<dods_int8, dods_uint32>(op, d_buf, static_cast<UInt32*>(b)->value());
        case dods_int64_c:
            return Cmp<dods_int8, dods_int64>(op, d_buf, static_cast<Int64*>(b)->value());
        case dods_uint64_c:
            return Cmp<dods_int8, dods_uint64>(op, d_buf, static_cast<UInt64*>(b)->value());
        case dods_float32_c:
            return Cmp<dods_int8, dods_float32>(op, d_buf, static_cast<Float32*>(b)->value());
        case dods_float64_c:
            return Cmp<dods_int8, 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 DAP4 to DAP2 transform
 *
 * Return a DAP2 'copy' of the variable. In this
 * case, since Int8 doesn't have a natural representation
 * in DAP2 we are going to just call it a Byte .
 * Why? Because SIZE.
 *
 * @param root The root group that should hold this new variable. Add Group-level
 * stuff here (e.g., D4Dimensions).
 * @param container Add the new variable to this container.
 *
 * @return A pointer to the transformed variable
 */
std::vector<BaseType *> *
Int8::transform_to_dap2(AttrTable *parent_attr_table)
{
    vector<BaseType *> *vec = BaseType::transform_to_dap2(parent_attr_table);
    if(vec->size()!=1){
        ostringstream oss;
        oss << __func__ << "() -  Something Bad Happened. This transform should produce only ";
        oss << " a single BaseType yet it produced " << vec->size();
        throw Error(internal_error,oss.str());
    }
    (*vec)[0]->set_type(dods_byte_c);
    return vec;
}
/**
 * @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
Int8::dump(ostream &strm) const
{
    strm << DapIndent::LMarg << "Int8::dump - ("
    << (void *)this << ")" << endl ;
    DapIndent::Indent() ;
    BaseType::dump(strm) ;
    strm << DapIndent::LMarg << "value: " << d_buf << endl ;
    DapIndent::UnIndent() ;
}

} // namespace libdap

