libdap++ Updated for version 3.14.0

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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  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 #include <sstream>
00040 
00041 #include "Byte.h"           // synonymous with UInt8 and Char
00042 #include "Int8.h"
00043 #include "Int16.h"
00044 #include "UInt16.h"
00045 #include "Int32.h"
00046 #include "UInt32.h"
00047 #include "Int64.h"
00048 #include "UInt64.h"
00049 #include "Float32.h"
00050 #include "Float64.h"
00051 #include "Str.h"
00052 #include "Url.h"
00053 
00054 #include "DDS.h"
00055 #include "Operators.h"
00056 #include "Marshaller.h"
00057 #include "UnMarshaller.h"
00058 
00059 #include "DMR.h"
00060 #include "D4StreamMarshaller.h"
00061 #include "D4StreamUnMarshaller.h"
00062 
00063 #include "util.h"
00064 #include "parser.h"
00065 #include "dods-limits.h"
00066 #include "InternalErr.h"
00067 
00068 using std::cerr;
00069 using std::endl;
00070 
00071 namespace libdap {
00072 
00082 Byte::Byte(const string & n): BaseType(n, dods_byte_c)
00083 {}
00084 
00095 Byte::Byte(const string &n, const string &d): BaseType(n, d, dods_byte_c)
00096 {}
00097 
00098 Byte::Byte(const Byte & copy_from): BaseType(copy_from)
00099 {
00100     d_buf = copy_from.d_buf;
00101 }
00102 
00103 BaseType *Byte::ptr_duplicate()
00104 {
00105     return new Byte(*this);
00106 }
00107 
00108 Byte & Byte::operator=(const Byte & rhs)
00109 {
00110     if (this == &rhs)
00111         return *this;
00112 
00113     dynamic_cast < BaseType & >(*this) = rhs;
00114 
00115     d_buf = rhs.d_buf;
00116 
00117     return *this;
00118 }
00119 
00120 unsigned int Byte::width(bool) const
00121 {
00122     return sizeof(dods_byte);
00123 }
00124 
00135 bool Byte::serialize(ConstraintEvaluator & eval, DDS & dds, Marshaller &m, bool ce_eval)
00136 {
00137     dds.timeout_on();
00138 
00139     if (!read_p())
00140         read();          // read() throws Error and InternalErr
00141 
00142     if (ce_eval && !eval.eval_selection(dds, dataset()))
00143         return true;
00144 
00145     dds.timeout_off();
00146 
00147     m.put_byte( d_buf ) ;
00148 
00149     return true;
00150 }
00151 
00155 bool Byte::deserialize(UnMarshaller &um, DDS *, bool)
00156 {
00157     um.get_byte( d_buf ) ;
00158 
00159     return false;
00160 }
00161 
00162 void
00163 Byte::compute_checksum(Crc32 &checksum)
00164 {
00165         checksum.AddData(reinterpret_cast<uint8_t*>(&d_buf), sizeof(d_buf));
00166 }
00167 
00176 void
00177 Byte::serialize(D4StreamMarshaller &m, DMR &, /*ConstraintEvaluator &,*/ bool)
00178 {
00179     if (!read_p())
00180         read();          // read() throws Error
00181 
00182     m.put_byte( d_buf ) ;
00183 }
00184 
00185 void
00186 Byte::deserialize(D4StreamUnMarshaller &um, DMR &)
00187 {
00188     um.get_byte( d_buf ) ;
00189 }
00190 
00196 unsigned int Byte::val2buf(void *val, bool)
00197 {
00198     // Jose Garcia
00199     // This method is public therefore and I believe it has being designed
00200     // to be use by read which must be implemented on the surrogate library,
00201     // thus if the pointer val is NULL, is an Internal Error.
00202     if (!val)
00203         throw InternalErr("the incoming pointer does not contain any data.");
00204 
00205     d_buf = *(dods_byte *) val;
00206 
00207     return width();
00208 }
00209 
00210 unsigned int Byte::buf2val(void **val)
00211 {
00212     // Jose Garcia
00213     // The same comment justifying throwing an Error in val2buf applies here.
00214     if (!val)
00215         throw InternalErr("NULL pointer");
00216 
00217     if (!*val)
00218         *val = new dods_byte;
00219 
00220     *(dods_byte *) * val = d_buf;
00221 
00222     return width();
00223 }
00224 
00229 bool Byte::set_value(dods_byte value)
00230 {
00231     d_buf = value;
00232     set_read_p(true);
00233 
00234     return true;
00235 }
00236 
00239 dods_byte Byte::value() const
00240 {
00241     return d_buf;
00242 }
00243 
00244 void Byte::print_val(FILE * out, string space, bool print_decl_p)
00245 {
00246     ostringstream oss;
00247     print_val(oss, space, print_decl_p);
00248     fwrite(oss.str().data(), sizeof(char), oss.str().length(), out);
00249 }
00250 
00251 void Byte::print_val(ostream &out, string space, bool print_decl_p)
00252 {
00253     if (print_decl_p) {
00254         print_decl(out, space, false);
00255         out << " = " << (int) d_buf << ";\n";
00256     }
00257     else
00258         out << (int) d_buf;
00259 }
00260 
00261 bool Byte::ops(BaseType * b, int op)
00262 {
00263 
00264     // Extract the Byte arg's value.
00265     if (!read_p() && !read()) {
00266         // Jose Garcia
00267         // Since the read method is virtual and implemented outside
00268         // libdap++ if we cannot read the data that is the problem
00269         // of the user or of whoever wrote the surrogate library
00270         // implementing read therefore it is an internal error.
00271         throw InternalErr("This value not read!");
00272     }
00273     // Extract the second arg's value.
00274     if (!b || !(b->read_p() || b->read())) {
00275         // Jose Garcia
00276         // Since the read method is virtual and implemented outside
00277         // libdap++ if we cannot read the data that is the problem
00278         // of the user or of whoever wrote the surrogate library
00279         // implementing read therefore it is an internal error.
00280         throw InternalErr("This value not read!");
00281     }
00282 
00283     switch (b->type()) {
00284         case dods_int8_c:
00285             return USCmp<dods_byte, dods_int8>(op, d_buf, static_cast<Int8*>(b)->value());
00286         case dods_byte_c:
00287             return Cmp<dods_byte, dods_byte>(op, d_buf, static_cast<Byte*>(b)->value());
00288         case dods_int16_c:
00289             return USCmp<dods_byte, dods_int16>(op, d_buf, static_cast<Int16*>(b)->value());
00290         case dods_uint16_c:
00291             return Cmp<dods_byte, dods_uint16>(op, d_buf, static_cast<UInt16*>(b)->value());
00292         case dods_int32_c:
00293             return USCmp<dods_byte, dods_int32>(op, d_buf, static_cast<Int32*>(b)->value());
00294         case dods_uint32_c:
00295             return Cmp<dods_byte, dods_uint32>(op, d_buf, static_cast<UInt32*>(b)->value());
00296         case dods_int64_c:
00297             return USCmp<dods_byte, dods_int64>(op, d_buf, static_cast<Int64*>(b)->value());
00298         case dods_uint64_c:
00299             return Cmp<dods_byte, dods_uint64>(op, d_buf, static_cast<UInt64*>(b)->value());
00300         case dods_float32_c:
00301             return USCmp<dods_byte, dods_float32>(op, d_buf, static_cast<Float32*>(b)->value());
00302         case dods_float64_c:
00303             return USCmp<dods_byte, dods_float64>(op, d_buf, static_cast<Float64*>(b)->value());
00304         default:
00305             return false;
00306     }
00307 }
00308 
00317 void Byte::dump(ostream & strm) const
00318 {
00319     strm << DapIndent::LMarg << "Byte::dump - ("
00320     << (void *) this << ")" << endl;
00321     DapIndent::Indent();
00322     BaseType::dump(strm);
00323     strm << DapIndent::LMarg << "value: " << d_buf << endl;
00324     DapIndent::UnIndent();
00325 }
00326 
00327 } // namespace libdap