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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 Str.
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//
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// jhrg 9/7/94
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#include "config.h"
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#include <sstream>
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#include "Byte.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 "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 "Array.h"
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#include "Structure.h"
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#include "Sequence.h"
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#include "Grid.h"
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#include "DDS.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 "D4StreamMarshaller.h"
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#include "D4StreamUnMarshaller.h"
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#include "util.h"
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#include "parser.h"
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#include "Operators.h"
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#include "InternalErr.h"
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#include "escaping.h"
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#include "debug.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 Str 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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@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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Str::Str(const string &n) : BaseType(n, dods_str_c), d_buf("")
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{}
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/** The Str server-side constructor accepts the name of the variable and the
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dataset name from which this instance is created.
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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 this
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variable is created
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*/
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Str::Str(const string &n, const string &d) : BaseType(n, d, dods_str_c), d_buf("")
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{}
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Str::Str(const Str ©_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 *
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Str::ptr_duplicate()
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{
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return new Str(*this);
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}
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Str &
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Str::operator=(const Str &rhs)
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{
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if (this == &rhs)
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return *this;
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// Call BaseType::operator=.
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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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int
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Str::length() const
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{
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return d_buf.length();
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}
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unsigned int
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Str::width(bool) const
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{
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return sizeof(string);
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}
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bool
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Str::serialize(ConstraintEvaluator &eval, DDS &dds, Marshaller &m, bool ce_eval)
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{
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DBG(cerr << "Entering (" << this->name() << " [" << this << "])" << endl);
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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();
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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_str( d_buf ) ;
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DBG(cerr << "Exiting: buf = " << d_buf << endl);
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return true;
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}
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// deserialize the string on stdin and put the result in BUF.
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bool
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Str::deserialize(UnMarshaller &um, DDS *, bool)
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{
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um.get_str( d_buf ) ;
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return false;
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}
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void
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Str::compute_checksum(Crc32 &checksum)
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{
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checksum.AddData(reinterpret_cast<const uint8_t*>(d_buf.data()), d_buf.length());
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}
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/**
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* @brief Serialize an Int8
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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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Str::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_str( d_buf ) ;
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}
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void
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Str::deserialize(D4StreamUnMarshaller &um, DMR &)
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{
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um.get_str( d_buf ) ;
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}
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/** Read the object's value and put a copy in the C++ string object
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referenced by \e **val. If \e *val is null, this method will allocate
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a string object using new and store the result there. If \e *val
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is not null, it will assume that \e *val references a string object
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and put the value there.
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@param val A pointer to null or to a string object.
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@return The sizeof(string*)
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@exception InternalErr Thrown if \e val is null. */
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unsigned int
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Str::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(__FILE__, __LINE__,
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"No place to store a reference to the data.");
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// If *val is null, then the caller has not allocated storage for the
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// value; we must. If there is storage there, assume it is a string and
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// assign d_buf's value to that storage.
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if (!*val)
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*val = new string(d_buf);
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else
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*static_cast<string*>(*val) = d_buf;
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return sizeof(string*);
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}
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|
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/** Store the value referenced by \e val in this object. Even though the
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type of \e val is \c void*, this method assumes the type is \c string*.
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Note that the value is copied so the caller if free to throw away/reuse
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the actual parameter once this call has returned.
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@param val A pointer to a C++ string object.
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@param reuse Not used by this version of the method.
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@exception IntenalErr if \e val is null.
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@return The width of the pointer. */
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unsigned int
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Str::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 surrogated 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(__FILE__, __LINE__, "NULL pointer.");
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d_buf = *static_cast<string*>(val);
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return sizeof(string*);
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}
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|
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/** Set the value of this instance.
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|
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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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|
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with the Passive* subclasses written by HAO. */
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|
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bool
|
|
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Str::set_value(const string &value)
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|
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{
|
|
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d_buf = value;
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|
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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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|
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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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a4aae4 |
string
|
|
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Str::value() const
|
|
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{
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|
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a4aae4 |
return d_buf;
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|
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}
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|
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void
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|
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Str::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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a4aae4 |
ostringstream oss;
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|
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a4aae4 |
print_val(oss, space, print_decl_p);
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|
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a4aae4 |
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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a4aae4 |
void
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Str::print_val(ostream &out, string space, bool print_decl_p)
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|
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{
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|
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a4aae4 |
if (print_decl_p) {
|
|
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a4aae4 |
print_decl(out, space, false);
|
|
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a4aae4 |
out << " = \"" << escattr(d_buf) << "\";\n" ;
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|
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}
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|
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a4aae4 |
else
|
|
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a4aae4 |
out << "\"" << escattr(d_buf) << "\"" ;
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|
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}
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|
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a4aae4 |
|
|
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a4aae4 |
bool
|
|
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a4aae4 |
Str::ops(BaseType *b, int op)
|
|
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{
|
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a4aae4 |
// Extract the Byte arg's value.
|
|
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a4aae4 |
if (!read_p() && !read()) {
|
|
Packit |
a4aae4 |
// Jose Garcia
|
|
Packit |
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
|
|
Packit |
a4aae4 |
// implemeting read therefore it is an internal error.
|
|
Packit |
a4aae4 |
throw InternalErr(__FILE__, __LINE__, "This value was not read!");
|
|
Packit |
a4aae4 |
}
|
|
Packit |
a4aae4 |
|
|
Packit |
a4aae4 |
// Extract the second arg's value.
|
|
Packit |
a4aae4 |
if (!b || !(b->read_p() || b->read())) {
|
|
Packit |
a4aae4 |
// Jose Garcia
|
|
Packit |
a4aae4 |
// Since the read method is virtual and implemented outside
|
|
Packit |
a4aae4 |
// libdap++ if we cannot read the data that is the problem
|
|
Packit |
a4aae4 |
// of the user or of whoever wrote the surrogate library
|
|
Packit |
a4aae4 |
// implemeting read therefore it is an internal error.
|
|
Packit |
a4aae4 |
throw InternalErr(__FILE__, __LINE__, "Argument value was not read!");
|
|
Packit |
a4aae4 |
}
|
|
Packit |
a4aae4 |
|
|
Packit |
a4aae4 |
return d4_ops(b, op);
|
|
Packit |
a4aae4 |
}
|
|
Packit |
a4aae4 |
|
|
Packit |
a4aae4 |
/**
|
|
Packit |
a4aae4 |
* @see BaseType::d4_ops(BaseType *, int)
|
|
Packit |
a4aae4 |
*/
|
|
Packit |
a4aae4 |
bool Str::d4_ops(BaseType *b, int op)
|
|
Packit |
a4aae4 |
{
|
|
Packit |
a4aae4 |
switch (b->type()) {
|
|
Packit |
a4aae4 |
case dods_byte_c:
|
|
Packit |
a4aae4 |
case dods_int8_c:
|
|
Packit |
a4aae4 |
case dods_int16_c:
|
|
Packit |
a4aae4 |
case dods_uint16_c:
|
|
Packit |
a4aae4 |
case dods_int32_c:
|
|
Packit |
a4aae4 |
case dods_uint32_c:
|
|
Packit |
a4aae4 |
case dods_int64_c:
|
|
Packit |
a4aae4 |
case dods_uint64_c:
|
|
Packit |
a4aae4 |
case dods_float32_c:
|
|
Packit |
a4aae4 |
case dods_float64_c:
|
|
Packit |
a4aae4 |
throw Error(malformed_expr, "Relational operators can only compare compatible types (string, number).");
|
|
Packit |
a4aae4 |
case dods_str_c:
|
|
Packit |
a4aae4 |
return StrCmp<string, string>(op, d_buf, static_cast<Str*>(b)->value());
|
|
Packit |
a4aae4 |
case dods_url_c:
|
|
Packit |
a4aae4 |
return StrCmp<string, string>(op, d_buf, static_cast<Url*>(b)->value());
|
|
Packit |
a4aae4 |
default:
|
|
Packit |
a4aae4 |
throw Error(malformed_expr, "Relational operators only work with scalar types.");
|
|
Packit |
a4aae4 |
}
|
|
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
|
|
Packit |
a4aae4 |
Str::dump(ostream &strm) const
|
|
Packit |
a4aae4 |
{
|
|
Packit |
a4aae4 |
strm << DapIndent::LMarg << "Str::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
|
|
Packit |
a4aae4 |
|