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// -*- mode: c++; c-basic-offset:4 -*-
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// This file is part of libdap, A C++ implementation of the OPeNDAP Data
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// Access Protocol.
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// Copyright (c) 2002,2003 OPeNDAP, Inc.
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// Author: James Gallagher <jgallagher@opendap.org>
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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//
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// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
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// (c) COPYRIGHT URI/MIT 1994-1999
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// Please read the full copyright statement in the file COPYRIGHT_URI.
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//
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// Authors:
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// jhrg,jimg James Gallagher <jgallagher@gso.uri.edu>
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// Implementation for Byte.
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//
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// jhrg 9/7/94
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//#define DODS_DEBUG
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#include "config.h"
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#include <sstream>
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#include "Byte.h" // synonymous with UInt8 and Char
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#include "Int8.h"
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#include "Int16.h"
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#include "UInt16.h"
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#include "Int32.h"
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#include "UInt32.h"
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#include "Int64.h"
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#include "UInt64.h"
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#include "Float32.h"
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#include "Float64.h"
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#include "Str.h"
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#include "Url.h"
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#include "DDS.h"
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#include "Operators.h"
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#include "Marshaller.h"
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#include "UnMarshaller.h"
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#include "DMR.h"
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#include "D4Attributes.h"
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#include "D4StreamMarshaller.h"
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#include "D4StreamUnMarshaller.h"
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#include "debug.h"
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#include "util.h"
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#include "parser.h"
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#include "dods-limits.h"
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#include "InternalErr.h"
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using std::cerr;
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using std::endl;
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namespace libdap {
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/** The Byte constructor requires only the name of the variable
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to be created. The name may be omitted, which will create a
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nameless variable. This may be adequate for some applications.
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@brief The Byte constructor.
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@param n A string containing the name of the variable to be
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created.
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*/
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Byte::Byte(const string & n): BaseType(n, dods_byte_c), d_buf(0)
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{}
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/** This Byte constructor requires the name of the variable to be created
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and the name of the dataset from which this variable is being created.
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This constructor is used in server-side processing, loading structure in
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from a dataset.
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@brief The Byte server-side constructor.
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@param n A string containing the name of the variable to be created.
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@param d A string containing the name of the dataset from which the
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variable is being created.
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*/
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Byte::Byte(const string &n, const string &d): BaseType(n, d, dods_byte_c), d_buf(0)
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{}
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Byte::Byte(const Byte & copy_from): BaseType(copy_from)
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{
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d_buf = copy_from.d_buf;
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}
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BaseType *Byte::ptr_duplicate()
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{
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return new Byte(*this);
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}
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Byte & Byte::operator=(const Byte & rhs)
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{
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if (this == &rhs)
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return *this;
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dynamic_cast < BaseType & >(*this) = rhs;
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d_buf = rhs.d_buf;
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return *this;
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}
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unsigned int Byte::width(bool) const
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{
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return sizeof(dods_byte);
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}
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/** Serialize the contents of member _BUF (the object's internal
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buffer, used to hold data) and write the result to stdout. If
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FLUSH is true, write the contents of the output buffer to the
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kernel. FLUSH is false by default. If CE_EVAL is true, evaluate
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the current constraint expression; only send data if the CE
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evaluates to true.
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@return False if a failure to read, send or flush is detected, true
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otherwise.
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*/
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bool Byte::serialize(ConstraintEvaluator & eval, DDS & dds, Marshaller &m, bool ce_eval)
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{
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#if USE_LOCAL_TIMEOUT_SCHEME
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dds.timeout_on();
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#endif
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if (!read_p())
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read(); // read() throws Error and InternalErr
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if (ce_eval && !eval.eval_selection(dds, dataset()))
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return true;
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#if USE_LOCAL_TIMEOUT_SCHEME
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dds.timeout_off();
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#endif
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m.put_byte( d_buf ) ;
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return true;
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}
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/** @brief Deserialize the char on stdin and put the result in
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<tt>_BUF</tt>.
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*/
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bool Byte::deserialize(UnMarshaller &um, DDS *, bool)
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{
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um.get_byte( d_buf ) ;
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return false;
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}
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void
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Byte::compute_checksum(Crc32 &checksum)
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{
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checksum.AddData(reinterpret_cast<uint8_t*>(&d_buf), sizeof(d_buf));
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}
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/**
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* @brief Serialize a Byte
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* @param m
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* @param dmr Unused
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* @param eval Unused
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* @param filter Unused
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* @exception Error is thrown if the value needs to be read and that operation fails.
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*/
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void
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Byte::serialize(D4StreamMarshaller &m, DMR &, /*ConstraintEvaluator &,*/ bool)
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{
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if (!read_p())
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read(); // read() throws Error
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m.put_byte( d_buf ) ;
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}
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void
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Byte::deserialize(D4StreamUnMarshaller &um, DMR &)
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{
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um.get_byte( d_buf ) ;
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}
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/** Store the value referenced by val in the object's internal
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buffer. reuse has no effect because this class does not
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dynamically allocate storage for the internal buffer.
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@return The size (in bytes) of the value's representation. */
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unsigned int Byte::val2buf(void *val, bool)
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{
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// Jose Garcia
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// This method is public therefore and I believe it has being designed
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// to be use by read which must be implemented on the surrogate library,
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// thus if the pointer val is NULL, is an Internal Error.
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if (!val)
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throw InternalErr("the incoming pointer does not contain any data.");
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d_buf = *(dods_byte *) val;
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return width();
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}
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unsigned int Byte::buf2val(void **val)
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{
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// Jose Garcia
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// The same comment justifying throwing an Error in val2buf applies here.
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if (!val)
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throw InternalErr("NULL pointer");
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if (!*val)
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*val = new dods_byte;
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*(dods_byte *) * val = d_buf;
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return width();
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}
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/** Set the value of this instance.
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@param value The value
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@return Always returns true; the return type of bool is for compatibility
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with the Passive* subclasses written by HAO. */
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bool Byte::set_value(dods_byte value)
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{
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d_buf = value;
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set_read_p(true);
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return true;
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}
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|
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/** Get the value of this instance.
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@return The value. */
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|
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dods_byte Byte::value() const
|
|
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{
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return d_buf;
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}
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void Byte::print_val(FILE * out, string space, bool print_decl_p)
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|
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{
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|
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ostringstream oss;
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|
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print_val(oss, space, print_decl_p);
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|
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fwrite(oss.str().data(), sizeof(char), oss.str().length(), out);
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|
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}
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|
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void Byte::print_val(ostream &out, string space, bool print_decl_p)
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|
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{
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if (print_decl_p) {
|
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print_decl(out, space, false);
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out << " = " << (int) d_buf << ";\n";
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}
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else
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out << (int) d_buf;
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|
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}
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|
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bool Byte::ops(BaseType * b, int op)
|
|
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{
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|
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// Extract the Byte arg's value.
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if (!read_p() && !read()) {
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a4aae4 |
// Jose Garcia
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|
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a4aae4 |
// Since the read method is virtual and implemented outside
|
|
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// libdap++ if we cannot read the data that is the problem
|
|
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// of the user or of whoever wrote the surrogate library
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// implementing read therefore it is an internal error.
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throw InternalErr("This value not read!");
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}
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// Extract the second arg's value.
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|
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if (!b || !(b->read_p() || b->read())) {
|
|
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a4aae4 |
// Jose Garcia
|
|
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a4aae4 |
// Since the read method is virtual and implemented outside
|
|
Packit |
a4aae4 |
// libdap++ if we cannot read the data that is the problem
|
|
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a4aae4 |
// of the user or of whoever wrote the surrogate library
|
|
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a4aae4 |
// implementing read therefore it is an internal error.
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|
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throw InternalErr("This value not read!");
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|
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a4aae4 |
}
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|
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a4aae4 |
|
|
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a4aae4 |
// By using the same operator code numbers for both the DAP2 and DAP4
|
|
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// parser/evaluator we can use the same evaluation code.
|
|
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return d4_ops(b, op);
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|
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a4aae4 |
}
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|
Packit |
a4aae4 |
|
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a4aae4 |
/**
|
|
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a4aae4 |
* @see BaseType::d4_ops(BaseType *, int)
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|
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a4aae4 |
*/
|
|
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a4aae4 |
bool Byte::d4_ops(BaseType *b, int op)
|
|
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a4aae4 |
{
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|
Packit |
a4aae4 |
switch (b->type()) {
|
|
Packit |
a4aae4 |
case dods_int8_c:
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Packit |
a4aae4 |
return USCmp<dods_byte, dods_int8>(op, d_buf, static_cast<Int8*>(b)->value());
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Packit |
a4aae4 |
case dods_byte_c:
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Packit |
a4aae4 |
return Cmp<dods_byte, dods_byte>(op, d_buf, static_cast<Byte*>(b)->value());
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Packit |
a4aae4 |
case dods_int16_c:
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Packit |
a4aae4 |
return USCmp<dods_byte, dods_int16>(op, d_buf, static_cast<Int16*>(b)->value());
|
|
Packit |
a4aae4 |
case dods_uint16_c:
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|
Packit |
a4aae4 |
return Cmp<dods_byte, dods_uint16>(op, d_buf, static_cast<UInt16*>(b)->value());
|
|
Packit |
a4aae4 |
case dods_int32_c:
|
|
Packit |
a4aae4 |
return USCmp<dods_byte, dods_int32>(op, d_buf, static_cast<Int32*>(b)->value());
|
|
Packit |
a4aae4 |
case dods_uint32_c:
|
|
Packit |
a4aae4 |
return Cmp<dods_byte, dods_uint32>(op, d_buf, static_cast<UInt32*>(b)->value());
|
|
Packit |
a4aae4 |
case dods_int64_c:
|
|
Packit |
a4aae4 |
return USCmp<dods_byte, dods_int64>(op, d_buf, static_cast<Int64*>(b)->value());
|
|
Packit |
a4aae4 |
case dods_uint64_c:
|
|
Packit |
a4aae4 |
return Cmp<dods_byte, dods_uint64>(op, d_buf, static_cast<UInt64*>(b)->value());
|
|
Packit |
a4aae4 |
case dods_float32_c:
|
|
Packit |
a4aae4 |
return USCmp<dods_byte, dods_float32>(op, d_buf, static_cast<Float32*>(b)->value());
|
|
Packit |
a4aae4 |
case dods_float64_c:
|
|
Packit |
a4aae4 |
return USCmp<dods_byte, dods_float64>(op, d_buf, static_cast<Float64*>(b)->value());
|
|
Packit |
a4aae4 |
case dods_str_c:
|
|
Packit |
a4aae4 |
case dods_url_c:
|
|
Packit |
a4aae4 |
throw Error(malformed_expr, "Relational operators can only compare compatible types (number, string).");
|
|
Packit |
a4aae4 |
default:
|
|
Packit |
a4aae4 |
throw Error(malformed_expr, "Relational operators only work with scalar types.");
|
|
Packit |
a4aae4 |
}
|
|
Packit |
a4aae4 |
}
|
|
Packit |
a4aae4 |
|
|
Packit |
a4aae4 |
|
|
Packit |
a4aae4 |
|
|
Packit |
a4aae4 |
|
|
Packit |
a4aae4 |
/** @brief DAP4 to DAP2 transform
|
|
Packit |
a4aae4 |
*
|
|
Packit |
a4aae4 |
* Return a DAP2 'copy' of the variable.
|
|
Packit |
a4aae4 |
*
|
|
Packit |
a4aae4 |
* NOTE: This little bit of magic ensures that the DAP4 shenanigans
|
|
Packit |
a4aae4 |
* in which UInt8, Char , and Byte are synonymous is reduced
|
|
Packit |
a4aae4 |
* to the DAP2 simplicity of Byte.
|
|
Packit |
a4aae4 |
*
|
|
Packit |
a4aae4 |
*
|
|
Packit |
a4aae4 |
* @param root The root group that should hold this new variable. Add Group-level
|
|
Packit |
a4aae4 |
* stuff here (e.g., D4Dimensions).
|
|
Packit |
a4aae4 |
* @param container Add the new variable to this container.
|
|
Packit |
a4aae4 |
*
|
|
Packit |
a4aae4 |
* @return A pointer to the transformed variable
|
|
Packit |
a4aae4 |
*/
|
|
Packit |
a4aae4 |
std::vector<BaseType *> *
|
|
Packit |
a4aae4 |
Byte::transform_to_dap2(AttrTable *parent_attr_table)
|
|
Packit |
a4aae4 |
{
|
|
Packit |
a4aae4 |
DBG(cerr << __func__ << "() - BEGIN" << endl;);
|
|
Packit |
a4aae4 |
vector<BaseType *> *vec = BaseType::transform_to_dap2(parent_attr_table);
|
|
Packit |
a4aae4 |
if(vec->size()!=1){
|
|
Packit |
a4aae4 |
ostringstream oss;
|
|
Packit |
a4aae4 |
oss << __func__ << "() - Something Bad Happened. This transform should produce only ";
|
|
Packit |
a4aae4 |
oss << " a single BaseType yet it produced " << vec->size();
|
|
Packit |
a4aae4 |
throw new Error(internal_error,oss.str());
|
|
Packit |
a4aae4 |
}
|
|
Packit |
a4aae4 |
|
|
Packit |
a4aae4 |
BaseType *dest = (*vec)[0];
|
|
Packit |
a4aae4 |
DBG(cerr << __func__ << "() - type(): " << type() << endl;);
|
|
Packit |
a4aae4 |
DBG(cerr << __func__ << "() - dest->type(): " << dest->type() << endl;);
|
|
Packit |
a4aae4 |
|
|
Packit |
a4aae4 |
// This little bit of magic ensures that the DAP4 shenanigans
|
|
Packit |
a4aae4 |
// in which UInt8, Char , and Byte are synonymous is reduced
|
|
Packit |
a4aae4 |
// to the DAP2 simplicity of Byte.
|
|
Packit |
a4aae4 |
if(type()!=dods_byte_c){
|
|
Packit |
a4aae4 |
dest->set_type(dods_byte_c);
|
|
Packit |
a4aae4 |
}
|
|
Packit |
a4aae4 |
DBG (dest->get_attr_table().print(cerr););
|
|
Packit |
a4aae4 |
|
|
Packit |
a4aae4 |
DBG(cerr << __func__ << "() - END" << endl;);
|
|
Packit |
a4aae4 |
return vec;
|
|
Packit |
a4aae4 |
}
|
|
Packit |
a4aae4 |
|
|
Packit |
a4aae4 |
/** @brief dumps information about this object
|
|
Packit |
a4aae4 |
*
|
|
Packit |
a4aae4 |
* Displays the pointer value of this instance and information about this
|
|
Packit |
a4aae4 |
* instance.
|
|
Packit |
a4aae4 |
*
|
|
Packit |
a4aae4 |
* @param strm C++ i/o stream to dump the information to
|
|
Packit |
a4aae4 |
* @return void
|
|
Packit |
a4aae4 |
*/
|
|
Packit |
a4aae4 |
void Byte::dump(ostream & strm) const
|
|
Packit |
a4aae4 |
{
|
|
Packit |
a4aae4 |
strm << DapIndent::LMarg << "Byte::dump - ("
|
|
Packit |
a4aae4 |
<< (void *) this << ")" << endl;
|
|
Packit |
a4aae4 |
DapIndent::Indent();
|
|
Packit |
a4aae4 |
BaseType::dump(strm);
|
|
Packit |
a4aae4 |
strm << DapIndent::LMarg << "value: " << d_buf << endl;
|
|
Packit |
a4aae4 |
DapIndent::UnIndent();
|
|
Packit |
a4aae4 |
}
|
|
Packit |
a4aae4 |
|
|
Packit |
a4aae4 |
} // namespace libdap
|