Float32.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 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 Float32.
00033 //
00034 // 3/22/99 jhrg
00035 
00036 
00037 #include <iomanip>
00038 
00039 #include "config.h"
00040 
00041 static char rcsid[] not_used =
00042     {"$Id: Float32.cc 17002 2007-08-27 19:16:51Z pwest $"
00043     };
00044 
00045 #include <stdlib.h>
00046 
00047 #include "Float32.h"
00048 #include "DDS.h"
00049 #include "util.h"
00050 #include "parser.h"
00051 #include "Operators.h"
00052 #include "dods-limits.h"
00053 #include "InternalErr.h"
00054 
00055 
00056 using std::cerr;
00057 using std::endl;
00058 
00066 Float32::Float32(const string &n)
00067         : BaseType(n, dods_float32_c)
00068 {}
00069 
00070 Float32::Float32(const Float32 &copy_from) : BaseType(copy_from)
00071 {
00072     _buf = copy_from._buf;
00073 }
00074 
00075 BaseType *
00076 Float32::ptr_duplicate()
00077 {
00078     return new Float32(*this);
00079 }
00080 
00081 Float32 &
00082 Float32::operator=(const Float32 &rhs)
00083 {
00084     if (this == &rhs)
00085         return *this;
00086 
00087     dynamic_cast<BaseType &>(*this) = rhs;
00088 
00089     _buf = rhs._buf;
00090 
00091     return *this;
00092 }
00093 
00094 unsigned int
00095 Float32::width()
00096 {
00097     return sizeof(dods_float32);
00098 }
00099 
00100 bool
00101 Float32::serialize(const string &dataset, ConstraintEvaluator &eval, DDS &dds,
00102                    Marshaller &m, bool ce_eval)
00103 {
00104     dds.timeout_on();
00105 
00106     if (!read_p())
00107         read(dataset);  // read() throws Error and InternalErr
00108 
00109 #if EVAL
00110     if (ce_eval && !eval.eval_selection(dds, dataset))
00111         return true;
00112 #endif
00113 
00114     dds.timeout_off();
00115 
00116     m.put_float32( _buf ) ;
00117 
00118     return true;
00119 }
00120 
00121 bool
00122 Float32::deserialize(UnMarshaller &um, DDS *, bool)
00123 {
00124     um.get_float32( _buf ) ;
00125 
00126     return false;
00127 }
00128 
00129 unsigned int
00130 Float32::val2buf(void *val, bool)
00131 {
00132     // Jose Garcia This method is public I believe it has been
00133     // designed to be used by read which must be implemented in a
00134     // subclass, thus if the pointer val is NULL, is an Internal
00135     // Error.
00136     // Changed to InternalErr. jhrg
00137     if (!val)
00138         throw InternalErr(__FILE__, __LINE__,
00139                           "The incoming pointer does not contain any data.");
00140 
00141     _buf = *(dods_float32 *)val;
00142 
00143     return width();
00144 }
00145 
00146 unsigned int
00147 Float32::buf2val(void **val)
00148 {
00149     // Jose Garcia
00150     // The same comment justifying throwing an Error in val2buf applies here.
00151     if (!val)
00152         throw InternalErr(__FILE__, __LINE__, "NULL pointer.");
00153 
00154     if (!*val)
00155         *val = new dods_float32;
00156 
00157     *(dods_float32 *)*val = _buf;
00158 
00159     return width();
00160 }
00161 
00162 bool
00163 Float32::set_value(dods_float32 f)
00164 {
00165     _buf = f;
00166     set_read_p(true);
00167 
00168     return true;
00169 }
00170 
00176 dods_float32
00177 Float32::value() const
00178 {
00179     return _buf;
00180 }
00181 
00182 void
00183 Float32::print_val(FILE *out, string space, bool print_decl_p)
00184 {
00185     // FIX: need to set precision in the printing somehow.
00186     // os.precision(DODS_FLT_DIG);
00187 
00188     if (print_decl_p) {
00189         print_decl(out, space, false);
00190         fprintf(out, " = %.6g;\n", _buf) ;
00191     }
00192     else
00193         fprintf(out, "%.6g", _buf) ;
00194 }
00195 
00196 void
00197 Float32::print_val(ostream &out, string space, bool print_decl_p)
00198 {
00199     // FIX: need to set precision in the printing somehow.
00200     // os.precision(DODS_FLT_DIG);
00201 
00202     if (print_decl_p) {
00203         print_decl(out, space, false);
00204         out << " = " << std::setprecision( 6 ) << _buf << ";\n" ;
00205     }
00206     else
00207         out << std::setprecision( 6 ) << _buf ;
00208 }
00209 
00210 bool
00211 Float32::ops(BaseType *b, int op, const string &dataset)
00212 {
00213     // Get this instance's value
00214     if (!read_p() && !read(dataset)) {
00215         // Jose Garcia Since the read method is virtual and
00216         // implemented outside libdap++ if we can not read the data
00217         // that is the problem of whomever wrote the implementation of
00218         // read and therefore it is an internal error.
00219         throw InternalErr(__FILE__, __LINE__, "This value not read!");
00220     }
00221 
00222     // Extract the second arg's value.
00223     if (!b->read_p() && !b->read(dataset)) {
00224         throw InternalErr(__FILE__, __LINE__, "This value not read!");
00225     }
00226 
00227     switch (b->type()) {
00228     case dods_byte_c:
00229         return rops<dods_float32, dods_byte, Cmp<dods_float32, dods_byte> >
00230                (_buf, dynamic_cast<Byte *>(b)->_buf, op);
00231     case dods_int16_c:
00232         return rops<dods_float32, dods_int16, Cmp<dods_float32, dods_int16> >
00233                (_buf, dynamic_cast<Int16 *>(b)->_buf, op);
00234     case dods_uint16_c:
00235         return rops<dods_float32, dods_uint16, Cmp<dods_float32, dods_uint16> >
00236                (_buf, dynamic_cast<UInt16 *>(b)->_buf, op);
00237     case dods_int32_c:
00238         return rops<dods_float32, dods_int32, Cmp<dods_float32, dods_int32> >
00239                (_buf, dynamic_cast<Int32 *>(b)->_buf, op);
00240     case dods_uint32_c:
00241         return rops<dods_float32, dods_uint32, Cmp<dods_float32, dods_uint32> >
00242                (_buf, dynamic_cast<UInt32 *>(b)->_buf, op);
00243     case dods_float32_c:
00244         return rops<dods_float32, dods_float32, Cmp<dods_float32, dods_float32> >
00245                (_buf, dynamic_cast<Float32 *>(b)->_buf, op);
00246     case dods_float64_c:
00247         return rops<dods_float32, dods_float64, Cmp<dods_float32, dods_float64> >
00248                (_buf, dynamic_cast<Float64 *>(b)->_buf, op);
00249     default:
00250         return false;
00251     }
00252 }
00253 
00262 void
00263 Float32::dump(ostream &strm) const
00264 {
00265     strm << DapIndent::LMarg << "Float32::dump - (" << (void *)this << ")"
00266          << endl ;
00267     DapIndent::Indent() ;
00268     BaseType::dump(strm) ;
00269     strm << DapIndent::LMarg << "value: " << _buf << endl ;
00270     DapIndent::UnIndent() ;
00271 }
00272 

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