Byte.cc

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00001 
00002 // -*- mode: c++; c-basic-offset:4 -*-
00003 
00004 // This file is part of libdap, A C++ implementation of the OPeNDAP Data
00005 // Access Protocol.
00006 
00007 // Copyright (c) 2002,2003 OPeNDAP, Inc.
00008 // Author: James Gallagher <jgallagher@opendap.org>
00009 //
00010 // This library is free software; you can redistribute it and/or
00011 // modify it under the terms of the GNU Lesser General Public
00012 // License as published by the Free Software Foundation; either
00013 // version 2.1 of the License, or (at your option) any later version.
00014 //
00015 // This library is distributed in the hope that it will be useful,
00016 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00018 // Lesser General Public License for more details.
00019 //
00020 // You should have received a copy of the GNU Lesser General Public
00021 // License along with this library; if not, write to the Free Software
00022 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00023 //
00024 // You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
00025 
00026 // (c) COPYRIGHT URI/MIT 1994-1999
00027 // Please read the full copyright statement in the file COPYRIGHT_URI.
00028 //
00029 // Authors:
00030 //      jhrg,jimg       James Gallagher <jgallagher@gso.uri.edu>
00031 
00032 // Implementation for Byte.
00033 //
00034 // jhrg 9/7/94
00035 
00036 
00037 #include "config.h"
00038 
00039 static char rcsid[] not_used =
00040     { "$Id: Byte.cc 18315 2008-03-03 20:14:44Z jimg $"
00041     };
00042 
00043 #include "Byte.h"
00044 //#include "Int16.h"
00045 #include "DDS.h"
00046 #include "Operators.h"
00047 
00048 #include "util.h"
00049 #include "parser.h"
00050 #include "dods-limits.h"
00051 #include "InternalErr.h"
00052 
00053 using std::cerr;
00054 using std::endl;
00055 
00066 namespace libdap {
00067 
00068 Byte::Byte(const string & n): BaseType(n, dods_byte_c)
00069 {}
00070 
00071 Byte::Byte(const Byte & copy_from): BaseType(copy_from)
00072 {
00073     _buf = copy_from._buf;
00074 }
00075 
00076 BaseType *Byte::ptr_duplicate()
00077 {
00078     return new Byte(*this);
00079 }
00080 
00081 Byte & Byte::operator=(const Byte & rhs)
00082 {
00083     if (this == &rhs)
00084         return *this;
00085 
00086     dynamic_cast < BaseType & >(*this) = rhs;
00087 
00088     _buf = rhs._buf;
00089 
00090     return *this;
00091 }
00092 
00093 unsigned int Byte::width()
00094 {
00095     return sizeof(dods_byte);
00096 }
00097 
00108 bool Byte::serialize(const string & dataset, ConstraintEvaluator & eval,
00109                      DDS & dds, Marshaller &m, bool ce_eval)
00110 {
00111     dds.timeout_on();
00112 
00113     if (!read_p())
00114         read(dataset);          // read() throws Error and InternalErr
00115 
00116 #if EVAL
00117     if (ce_eval && !eval.eval_selection(dds, dataset))
00118         return true;
00119 #endif
00120 
00121     dds.timeout_off();
00122 
00123     m.put_byte( _buf ) ;
00124 
00125     return true;
00126 }
00127 
00131 bool Byte::deserialize(UnMarshaller &um, DDS *, bool)
00132 {
00133     um.get_byte( _buf ) ;
00134 
00135     return false;
00136 }
00137 
00143 unsigned int Byte::val2buf(void *val, bool)
00144 {
00145     // Jose Garcia
00146     // This method is public therefore and I believe it has being designed
00147     // to be use by read which must be implemented on the surrogate library,
00148     // thus if the pointer val is NULL, is an Internal Error.
00149     if (!val)
00150         throw InternalErr("the incoming pointer does not contain any data.");
00151 
00152     _buf = *(dods_byte *) val;
00153 
00154     return width();
00155 }
00156 
00157 unsigned int Byte::buf2val(void **val)
00158 {
00159     // Jose Garcia
00160     // The same comment justifying throwing an Error in val2buf applies here.
00161     if (!val)
00162         throw InternalErr("NULL pointer");
00163 
00164     if (!*val)
00165         *val = new dods_byte;
00166 
00167     *(dods_byte *) * val = _buf;
00168 
00169     return width();
00170 }
00171 
00176 bool Byte::set_value(dods_byte value)
00177 {
00178     _buf = value;
00179     set_read_p(true);
00180 
00181     return true;
00182 }
00183 
00186 dods_byte Byte::value() const
00187 {
00188     return _buf;
00189 }
00190 
00191 void Byte::print_val(FILE * out, string space, bool print_decl_p)
00192 {
00193     if (print_decl_p) {
00194         print_decl(out, space, false);
00195         fprintf(out, " = %d;\n", (int) _buf);
00196     }
00197     else
00198         fprintf(out, "%d", (int) _buf);
00199 }
00200 
00201 void Byte::print_val(ostream &out, string space, bool print_decl_p)
00202 {
00203     if (print_decl_p) {
00204         print_decl(out, space, false);
00205         out << " = " << (int)_buf << ";\n" ;
00206     }
00207     else
00208         out << (int)_buf ;
00209 }
00210 
00211 bool Byte::ops(BaseType * b, int op, const string & dataset)
00212 {
00213 
00214     // Extract the Byte arg's value.
00215     if (!read_p() && !read(dataset)) {
00216         cerr << "This value not read!" << endl;
00217         // Jose Garcia
00218         // Since the read method is virtual and implemented outside
00219         // libdap++ if we can not read the data that is the problem
00220         // of the user or of whoever wrote the surrogate library
00221         // implementing read therefore it is an internal error.
00222         throw InternalErr("This value not read!");
00223     }
00224     // Extract the second arg's value.
00225     if (!b->read_p() && !b->read(dataset)) {
00226         cerr << "This value not read!" << endl;
00227         // Jose Garcia
00228         // Since the read method is virtual and implemented outside
00229         // libdap++ if we can not read the data that is the problem
00230         // of the user or of whoever wrote the surrogate library
00231         // implementing read therefore it is an internal error.
00232         throw InternalErr("This value not read!");
00233     }
00234 
00235     switch (b->type()) {
00236     case dods_byte_c:
00237         return rops < dods_byte, dods_byte, Cmp < dods_byte, dods_byte > >
00238                (_buf, dynamic_cast < Byte * >(b)->_buf, op);
00239     case dods_int16_c:
00240         return rops < dods_byte, dods_int16, USCmp < dods_byte,
00241                dods_int16 > > (_buf, dynamic_cast < Int16 * >(b)->_buf, op);
00242     case dods_uint16_c:
00243         return rops < dods_byte, dods_uint16, Cmp < dods_byte,
00244                dods_uint16 > > (_buf, dynamic_cast < UInt16 * >(b)->_buf, op);
00245     case dods_int32_c:
00246         return rops < dods_byte, dods_int32, USCmp < dods_byte,
00247                dods_int32 > > (_buf, dynamic_cast < Int32 * >(b)->_buf, op);
00248     case dods_uint32_c:
00249         return rops < dods_byte, dods_uint32, Cmp < dods_byte,
00250                dods_uint32 > > (_buf, dynamic_cast < UInt32 * >(b)->_buf, op);
00251     case dods_float32_c:
00252         return rops < dods_byte, dods_float32, Cmp < dods_byte,
00253                dods_float32 > > (_buf, dynamic_cast < Float32 * >(b)->_buf,
00254                                  op);
00255     case dods_float64_c:
00256         return rops < dods_byte, dods_float64, Cmp < dods_byte,
00257                dods_float64 > > (_buf, dynamic_cast < Float64 * >(b)->_buf,
00258                                  op);
00259     default:
00260         return false;
00261     }
00262 }
00263 
00272 void Byte::dump(ostream & strm) const
00273 {
00274     strm << DapIndent::LMarg << "Byte::dump - ("
00275     << (void *) this << ")" << endl;
00276     DapIndent::Indent();
00277     BaseType::dump(strm);
00278     strm << DapIndent::LMarg << "value: " << _buf << endl;
00279     DapIndent::UnIndent();
00280 }
00281 
00282 } // namespace libdap

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