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 20518 2009-03-05 23:39:46Z jimg $"
00043     };
00044 
00045 #include "Float32.h"
00046 #include "DDS.h"
00047 #include "util.h"
00048 #include "parser.h"
00049 #include "Operators.h"
00050 #include "dods-limits.h"
00051 #include "InternalErr.h"
00052 
00053 
00054 using std::cerr;
00055 using std::endl;
00056 
00057 namespace libdap {
00058 
00066 Float32::Float32(const string &n)
00067         : BaseType(n, dods_float32_c)
00068 {}
00069 
00077 Float32::Float32(const string &n, const string &d)
00078         : BaseType(n, d, dods_float32_c)
00079 {}
00080 
00081 Float32::Float32(const Float32 &copy_from) : BaseType(copy_from)
00082 {
00083     _buf = copy_from._buf;
00084 }
00085 
00086 BaseType *
00087 Float32::ptr_duplicate()
00088 {
00089     return new Float32(*this);
00090 }
00091 
00092 Float32 &
00093 Float32::operator=(const Float32 &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
00106 Float32::width()
00107 {
00108     return sizeof(dods_float32);
00109 }
00110 
00111 bool
00112 Float32::serialize(ConstraintEvaluator &eval, DDS &dds,
00113                    Marshaller &m, bool ce_eval)
00114 {
00115     dds.timeout_on();
00116 
00117     if (!read_p())
00118         read();  // read() throws Error and InternalErr
00119 
00120 #if EVAL
00121     if (ce_eval && !eval.eval_selection(dds, dataset()))
00122         return true;
00123 #endif
00124 
00125     dds.timeout_off();
00126 
00127     m.put_float32( _buf ) ;
00128 
00129     return true;
00130 }
00131 
00132 bool
00133 Float32::deserialize(UnMarshaller &um, DDS *, bool)
00134 {
00135     um.get_float32( _buf ) ;
00136 
00137     return false;
00138 }
00139 
00140 unsigned int
00141 Float32::val2buf(void *val, bool)
00142 {
00143     // Jose Garcia This method is public I believe it has been
00144     // designed to be used by read which must be implemented in a
00145     // subclass, thus if the pointer val is NULL, is an Internal
00146     // Error.
00147     // Changed to InternalErr. jhrg
00148     if (!val)
00149         throw InternalErr(__FILE__, __LINE__,
00150                           "The incoming pointer does not contain any data.");
00151 
00152     _buf = *(dods_float32 *)val;
00153 
00154     return width();
00155 }
00156 
00157 unsigned int
00158 Float32::buf2val(void **val)
00159 {
00160     // Jose Garcia
00161     // The same comment justifying throwing an Error in val2buf applies here.
00162     if (!val)
00163         throw InternalErr(__FILE__, __LINE__, "NULL pointer.");
00164 
00165     if (!*val)
00166         *val = new dods_float32;
00167 
00168     *(dods_float32 *)*val = _buf;
00169 
00170     return width();
00171 }
00172 
00173 bool
00174 Float32::set_value(dods_float32 f)
00175 {
00176     _buf = f;
00177     set_read_p(true);
00178 
00179     return true;
00180 }
00181 
00187 dods_float32
00188 Float32::value() const
00189 {
00190     return _buf;
00191 }
00192 //#if FILE_METHODS
00193 void
00194 Float32::print_val(FILE *out, string space, bool print_decl_p)
00195 {
00196     // FIX: need to set precision in the printing somehow.
00197     // os.precision(DODS_FLT_DIG);
00198 
00199     if (print_decl_p) {
00200         print_decl(out, space, false);
00201         fprintf(out, " = %.6g;\n", _buf) ;
00202     }
00203     else
00204         fprintf(out, "%.6g", _buf) ;
00205 }
00206 //#endif
00207 void
00208 Float32::print_val(ostream &out, string space, bool print_decl_p)
00209 {
00210     // FIX: need to set precision in the printing somehow.
00211     // os.precision(DODS_FLT_DIG);
00212 
00213     if (print_decl_p) {
00214         print_decl(out, space, false);
00215         out << " = " << std::setprecision( 6 ) << _buf << ";\n" ;
00216     }
00217     else
00218         out << std::setprecision( 6 ) << _buf ;
00219 }
00220 
00221 bool
00222 Float32::ops(BaseType *b, int op)
00223 {
00224     // Get this instance's value
00225     if (!read_p() && !read()) {
00226         // Jose Garcia Since the read method is virtual and
00227         // implemented outside libdap++ if we cannot read the data
00228         // that is the problem of whomever wrote the implementation of
00229         // read and therefore it is an internal error.
00230         throw InternalErr(__FILE__, __LINE__, "This value not read!");
00231     }
00232 
00233     // Extract the second arg's value.
00234     if (!b || !b->read_p() && !b->read()) {
00235         throw InternalErr(__FILE__, __LINE__, "This value not read!");
00236     }
00237 
00238     switch (b->type()) {
00239     case dods_byte_c:
00240         return rops<dods_float32, dods_byte, Cmp<dods_float32, dods_byte> >
00241                (_buf, dynamic_cast<Byte *>(b)->_buf, op);
00242     case dods_int16_c:
00243         return rops<dods_float32, dods_int16, Cmp<dods_float32, dods_int16> >
00244                (_buf, dynamic_cast<Int16 *>(b)->_buf, op);
00245     case dods_uint16_c:
00246         return rops<dods_float32, dods_uint16, Cmp<dods_float32, dods_uint16> >
00247                (_buf, dynamic_cast<UInt16 *>(b)->_buf, op);
00248     case dods_int32_c:
00249         return rops<dods_float32, dods_int32, Cmp<dods_float32, dods_int32> >
00250                (_buf, dynamic_cast<Int32 *>(b)->_buf, op);
00251     case dods_uint32_c:
00252         return rops<dods_float32, dods_uint32, Cmp<dods_float32, dods_uint32> >
00253                (_buf, dynamic_cast<UInt32 *>(b)->_buf, op);
00254     case dods_float32_c:
00255         return rops<dods_float32, dods_float32, Cmp<dods_float32, dods_float32> >
00256                (_buf, dynamic_cast<Float32 *>(b)->_buf, op);
00257     case dods_float64_c:
00258         return rops<dods_float32, dods_float64, Cmp<dods_float32, dods_float64> >
00259                (_buf, dynamic_cast<Float64 *>(b)->_buf, op);
00260     default:
00261         return false;
00262     }
00263 }
00264 
00273 void
00274 Float32::dump(ostream &strm) const
00275 {
00276     strm << DapIndent::LMarg << "Float32::dump - (" << (void *)this << ")"
00277          << endl ;
00278     DapIndent::Indent() ;
00279     BaseType::dump(strm) ;
00280     strm << DapIndent::LMarg << "value: " << _buf << endl ;
00281     DapIndent::UnIndent() ;
00282 }
00283 
00284 } // namespace libdap
00285 

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