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 20518 2009-03-05 23:39:46Z 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 
00056 namespace libdap {
00057 
00067 Byte::Byte(const string & n): BaseType(n, dods_byte_c)
00068 {}
00069 
00080 Byte::Byte(const string &n, const string &d): BaseType(n, d, dods_byte_c)
00081 {}
00082 
00083 Byte::Byte(const Byte & copy_from): BaseType(copy_from)
00084 {
00085     _buf = copy_from._buf;
00086 }
00087 
00088 BaseType *Byte::ptr_duplicate()
00089 {
00090     return new Byte(*this);
00091 }
00092 
00093 Byte & Byte::operator=(const Byte & rhs)
00094 {
00095     if (this == &rhs)
00096         return *this;
00097 
00098     dynamic_cast < BaseType & >(*this) = rhs;
00099 
00100     _buf = rhs._buf;
00101 
00102     return *this;
00103 }
00104 
00105 unsigned int Byte::width()
00106 {
00107     return sizeof(dods_byte);
00108 }
00109 
00120 bool Byte::serialize(ConstraintEvaluator & eval, DDS & dds,
00121                      Marshaller &m, bool ce_eval)
00122 {
00123     dds.timeout_on();
00124 
00125     if (!read_p())
00126         read();          // read() throws Error and InternalErr
00127 
00128 #if EVAL
00129     if (ce_eval && !eval.eval_selection(dds, dataset()))
00130         return true;
00131 #endif
00132 
00133     dds.timeout_off();
00134 
00135     m.put_byte( _buf ) ;
00136 
00137     return true;
00138 }
00139 
00143 bool Byte::deserialize(UnMarshaller &um, DDS *, bool)
00144 {
00145     um.get_byte( _buf ) ;
00146 
00147     return false;
00148 }
00149 
00155 unsigned int Byte::val2buf(void *val, bool)
00156 {
00157     // Jose Garcia
00158     // This method is public therefore and I believe it has being designed
00159     // to be use by read which must be implemented on the surrogate library,
00160     // thus if the pointer val is NULL, is an Internal Error.
00161     if (!val)
00162         throw InternalErr("the incoming pointer does not contain any data.");
00163 
00164     _buf = *(dods_byte *) val;
00165 
00166     return width();
00167 }
00168 
00169 unsigned int Byte::buf2val(void **val)
00170 {
00171     // Jose Garcia
00172     // The same comment justifying throwing an Error in val2buf applies here.
00173     if (!val)
00174         throw InternalErr("NULL pointer");
00175 
00176     if (!*val)
00177         *val = new dods_byte;
00178 
00179     *(dods_byte *) * val = _buf;
00180 
00181     return width();
00182 }
00183 
00188 bool Byte::set_value(dods_byte value)
00189 {
00190     _buf = value;
00191     set_read_p(true);
00192 
00193     return true;
00194 }
00195 
00198 dods_byte Byte::value() const
00199 {
00200     return _buf;
00201 }
00202 //#if FILE_METHODS
00203 void Byte::print_val(FILE * out, string space, bool print_decl_p)
00204 {
00205     if (print_decl_p) {
00206         print_decl(out, space, false);
00207         fprintf(out, " = %d;\n", (int) _buf);
00208     }
00209     else
00210         fprintf(out, "%d", (int) _buf);
00211 }
00212 //#endif
00213 void Byte::print_val(ostream &out, string space, bool print_decl_p)
00214 {
00215     if (print_decl_p) {
00216         print_decl(out, space, false);
00217         out << " = " << (int)_buf << ";\n" ;
00218     }
00219     else
00220         out << (int)_buf ;
00221 }
00222 
00223 bool Byte::ops(BaseType * b, int op)
00224 {
00225 
00226     // Extract the Byte arg's value.
00227     if (!read_p() && !read()) {
00228         cerr << "This value not read!" << endl;
00229         // Jose Garcia
00230         // Since the read method is virtual and implemented outside
00231         // libdap++ if we cannot read the data that is the problem
00232         // of the user or of whoever wrote the surrogate library
00233         // implementing read therefore it is an internal error.
00234         throw InternalErr("This value not read!");
00235     }
00236     // Extract the second arg's value.
00237     if (!b || !b->read_p() && !b->read()) {
00238         cerr << "This value not read!" << endl;
00239         // Jose Garcia
00240         // Since the read method is virtual and implemented outside
00241         // libdap++ if we cannot read the data that is the problem
00242         // of the user or of whoever wrote the surrogate library
00243         // implementing read therefore it is an internal error.
00244         throw InternalErr("This value not read!");
00245     }
00246 
00247     switch (b->type()) {
00248     case dods_byte_c:
00249         return rops < dods_byte, dods_byte, Cmp < dods_byte, dods_byte > >
00250                (_buf, dynamic_cast < Byte * >(b)->_buf, op);
00251     case dods_int16_c:
00252         return rops < dods_byte, dods_int16, USCmp < dods_byte,
00253                dods_int16 > > (_buf, dynamic_cast < Int16 * >(b)->_buf, op);
00254     case dods_uint16_c:
00255         return rops < dods_byte, dods_uint16, Cmp < dods_byte,
00256                dods_uint16 > > (_buf, dynamic_cast < UInt16 * >(b)->_buf, op);
00257     case dods_int32_c:
00258         return rops < dods_byte, dods_int32, USCmp < dods_byte,
00259                dods_int32 > > (_buf, dynamic_cast < Int32 * >(b)->_buf, op);
00260     case dods_uint32_c:
00261         return rops < dods_byte, dods_uint32, Cmp < dods_byte,
00262                dods_uint32 > > (_buf, dynamic_cast < UInt32 * >(b)->_buf, op);
00263     case dods_float32_c:
00264         return rops < dods_byte, dods_float32, Cmp < dods_byte,
00265                dods_float32 > > (_buf, dynamic_cast < Float32 * >(b)->_buf,
00266                                  op);
00267     case dods_float64_c:
00268         return rops < dods_byte, dods_float64, Cmp < dods_byte,
00269                dods_float64 > > (_buf, dynamic_cast < Float64 * >(b)->_buf,
00270                                  op);
00271     default:
00272         return false;
00273     }
00274 }
00275 
00284 void Byte::dump(ostream & strm) const
00285 {
00286     strm << DapIndent::LMarg << "Byte::dump - ("
00287     << (void *) this << ")" << endl;
00288     DapIndent::Indent();
00289     BaseType::dump(strm);
00290     strm << DapIndent::LMarg << "value: " << _buf << endl;
00291     DapIndent::UnIndent();
00292 }
00293 
00294 } // namespace libdap