libdap++ Updated for version 3.8.2

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 21699 2009-11-05 00:06:01Z jimg $"
00041     };
00042 
00043 #include "Byte.h"
00044 #include "Int16.h"
00045 #include "UInt16.h"
00046 #include "Int32.h"
00047 #include "UInt32.h"
00048 #include "Float32.h"
00049 #include "Float64.h"
00050 #include "Str.h"
00051 #include "Url.h"
00052 #include "Array.h"
00053 #include "Structure.h"
00054 #include "Sequence.h"
00055 #include "Grid.h"
00056 
00057 #include "DDS.h"
00058 #include "Operators.h"
00059 
00060 #include "util.h"
00061 #include "parser.h"
00062 #include "dods-limits.h"
00063 #include "InternalErr.h"
00064 
00065 using std::cerr;
00066 using std::endl;
00067 
00068 namespace libdap {
00069 
00079 Byte::Byte(const string & n): BaseType(n, dods_byte_c)
00080 {}
00081 
00092 Byte::Byte(const string &n, const string &d): BaseType(n, d, dods_byte_c)
00093 {}
00094 
00095 Byte::Byte(const Byte & copy_from): BaseType(copy_from)
00096 {
00097     _buf = copy_from._buf;
00098 }
00099 
00100 BaseType *Byte::ptr_duplicate()
00101 {
00102     return new Byte(*this);
00103 }
00104 
00105 Byte & Byte::operator=(const Byte & rhs)
00106 {
00107     if (this == &rhs)
00108         return *this;
00109 
00110     dynamic_cast < BaseType & >(*this) = rhs;
00111 
00112     _buf = rhs._buf;
00113 
00114     return *this;
00115 }
00116 
00117 unsigned int Byte::width()
00118 {
00119     return sizeof(dods_byte);
00120 }
00121 
00132 bool Byte::serialize(ConstraintEvaluator & eval, DDS & dds,
00133                      Marshaller &m, bool ce_eval)
00134 {
00135     dds.timeout_on();
00136 
00137     if (!read_p())
00138         read();          // read() throws Error and InternalErr
00139 
00140 #if EVAL
00141     if (ce_eval && !eval.eval_selection(dds, dataset()))
00142         return true;
00143 #endif
00144 
00145     dds.timeout_off();
00146 
00147     m.put_byte( _buf ) ;
00148 
00149     return true;
00150 }
00151 
00155 bool Byte::deserialize(UnMarshaller &um, DDS *, bool)
00156 {
00157     um.get_byte( _buf ) ;
00158 
00159     return false;
00160 }
00161 
00167 unsigned int Byte::val2buf(void *val, bool)
00168 {
00169     // Jose Garcia
00170     // This method is public therefore and I believe it has being designed
00171     // to be use by read which must be implemented on the surrogate library,
00172     // thus if the pointer val is NULL, is an Internal Error.
00173     if (!val)
00174         throw InternalErr("the incoming pointer does not contain any data.");
00175 
00176     _buf = *(dods_byte *) val;
00177 
00178     return width();
00179 }
00180 
00181 unsigned int Byte::buf2val(void **val)
00182 {
00183     // Jose Garcia
00184     // The same comment justifying throwing an Error in val2buf applies here.
00185     if (!val)
00186         throw InternalErr("NULL pointer");
00187 
00188     if (!*val)
00189         *val = new dods_byte;
00190 
00191     *(dods_byte *) * val = _buf;
00192 
00193     return width();
00194 }
00195 
00200 bool Byte::set_value(dods_byte value)
00201 {
00202     _buf = value;
00203     set_read_p(true);
00204 
00205     return true;
00206 }
00207 
00210 dods_byte Byte::value() const
00211 {
00212     return _buf;
00213 }
00214 
00215 #if FILE_METHODS
00216 void Byte::print_val(FILE * out, string space, bool print_decl_p)
00217 {
00218     if (print_decl_p) {
00219         print_decl(out, space, false);
00220         fprintf(out, " = %d;\n", (int) _buf);
00221     }
00222     else
00223         fprintf(out, "%d", (int) _buf);
00224 }
00225 #endif
00226 
00227 void Byte::print_val(ostream &out, string space, bool print_decl_p)
00228 {
00229     if (print_decl_p) {
00230         print_decl(out, space, false);
00231         out << " = " << (int)_buf << ";\n" ;
00232     }
00233     else
00234         out << (int)_buf ;
00235 }
00236 
00237 bool Byte::ops(BaseType * b, int op)
00238 {
00239 
00240     // Extract the Byte arg's value.
00241     if (!read_p() && !read()) {
00242         // Jose Garcia
00243         // Since the read method is virtual and implemented outside
00244         // libdap++ if we cannot read the data that is the problem
00245         // of the user or of whoever wrote the surrogate library
00246         // implementing read therefore it is an internal error.
00247         throw InternalErr("This value not read!");
00248     }
00249     // Extract the second arg's value.
00250     if (!b || !(b->read_p() || b->read())) {
00251         // Jose Garcia
00252         // Since the read method is virtual and implemented outside
00253         // libdap++ if we cannot read the data that is the problem
00254         // of the user or of whoever wrote the surrogate library
00255         // implementing read therefore it is an internal error.
00256         throw InternalErr("This value not read!");
00257     }
00258 
00259     switch (b->type()) {
00260     case dods_byte_c:
00261         return rops < dods_byte, dods_byte, Cmp < dods_byte, dods_byte > >
00262                (_buf, dynamic_cast < Byte * >(b)->_buf, op);
00263     case dods_int16_c:
00264         return rops < dods_byte, dods_int16, USCmp < dods_byte,
00265                dods_int16 > > (_buf, dynamic_cast < Int16 * >(b)->_buf, op);
00266     case dods_uint16_c:
00267         return rops < dods_byte, dods_uint16, Cmp < dods_byte,
00268                dods_uint16 > > (_buf, dynamic_cast < UInt16 * >(b)->_buf, op);
00269     case dods_int32_c:
00270         return rops < dods_byte, dods_int32, USCmp < dods_byte,
00271                dods_int32 > > (_buf, dynamic_cast < Int32 * >(b)->_buf, op);
00272     case dods_uint32_c:
00273         return rops < dods_byte, dods_uint32, Cmp < dods_byte,
00274                dods_uint32 > > (_buf, dynamic_cast < UInt32 * >(b)->_buf, op);
00275     case dods_float32_c:
00276         return rops < dods_byte, dods_float32, Cmp < dods_byte,
00277                dods_float32 > > (_buf, dynamic_cast < Float32 * >(b)->_buf,
00278                                  op);
00279     case dods_float64_c:
00280         return rops < dods_byte, dods_float64, Cmp < dods_byte,
00281                dods_float64 > > (_buf, dynamic_cast < Float64 * >(b)->_buf,
00282                                  op);
00283     default:
00284         return false;
00285     }
00286 }
00287 
00296 void Byte::dump(ostream & strm) const
00297 {
00298     strm << DapIndent::LMarg << "Byte::dump - ("
00299     << (void *) this << ")" << endl;
00300     DapIndent::Indent();
00301     BaseType::dump(strm);
00302     strm << DapIndent::LMarg << "value: " << _buf << endl;
00303     DapIndent::UnIndent();
00304 }
00305 
00306 } // namespace libdap