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 "config.h"
00038 
00039 static char rcsid[] not_used =
00040     {"$Id: Float32.cc 16444 2007-05-10 16:09:07Z jimg $"
00041     };
00042 
00043 #include <stdlib.h>
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 
00064 Float32::Float32(const string &n)
00065         : BaseType(n, dods_float32_c, (xdrproc_t)XDR_FLOAT32)
00066 {}
00067 
00068 Float32::Float32(const Float32 &copy_from) : BaseType(copy_from)
00069 {
00070     _buf = copy_from._buf;
00071 }
00072 
00073 BaseType *
00074 Float32::ptr_duplicate()
00075 {
00076     return new Float32(*this);
00077 }
00078 
00079 Float32 &
00080 Float32::operator=(const Float32 &rhs)
00081 {
00082     if (this == &rhs)
00083         return *this;
00084 
00085     dynamic_cast<BaseType &>(*this) = rhs;
00086 
00087     _buf = rhs._buf;
00088 
00089     return *this;
00090 }
00091 
00092 unsigned int
00093 Float32::width()
00094 {
00095     return sizeof(dods_float32);
00096 }
00097 
00098 bool
00099 Float32::serialize(const string &dataset, ConstraintEvaluator &eval, DDS &dds,
00100                    XDR *sink, bool ce_eval)
00101 {
00102     dds.timeout_on();
00103 
00104     if (!read_p())
00105         read(dataset);  // read() throws Error and InternalErr
00106 
00107 #if EVAL
00108     if (ce_eval && !eval.eval_selection(dds, dataset))
00109         return true;
00110 #endif
00111 
00112     dds.timeout_off();
00113 
00114     if (!xdr_float(sink, &_buf))
00115         throw Error("Network I/O Error. Could not send float 32 data.\nThis may be due to a bug in libdap, on the server or a\nproblem with the network connection.");
00116 
00117     return true;
00118 }
00119 
00120 bool
00121 Float32::deserialize(XDR *source, DDS *, bool)
00122 {
00123     if (!xdr_float(source, &_buf))
00124         throw Error("Network I/O Error. Could not read float 32 data. This may be due to a\nbug in libdap or a problem with the network connection.");
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 bool
00197 Float32::ops(BaseType *b, int op, const string &dataset)
00198 {
00199     // Get this instance's value
00200     if (!read_p() && !read(dataset)) {
00201         // Jose Garcia Since the read method is virtual and
00202         // implemented outside libdap++ if we can not read the data
00203         // that is the problem of whomever wrote the implementation of
00204         // read and therefore it is an internal error.
00205         throw InternalErr(__FILE__, __LINE__, "This value not read!");
00206     }
00207 
00208     // Extract the second arg's value.
00209     if (!b->read_p() && !b->read(dataset)) {
00210         throw InternalErr(__FILE__, __LINE__, "This value not read!");
00211     }
00212 
00213     switch (b->type()) {
00214     case dods_byte_c:
00215         return rops<dods_float32, dods_byte, Cmp<dods_float32, dods_byte> >
00216                (_buf, dynamic_cast<Byte *>(b)->_buf, op);
00217     case dods_int16_c:
00218         return rops<dods_float32, dods_int16, Cmp<dods_float32, dods_int16> >
00219                (_buf, dynamic_cast<Int16 *>(b)->_buf, op);
00220     case dods_uint16_c:
00221         return rops<dods_float32, dods_uint16, Cmp<dods_float32, dods_uint16> >
00222                (_buf, dynamic_cast<UInt16 *>(b)->_buf, op);
00223     case dods_int32_c:
00224         return rops<dods_float32, dods_int32, Cmp<dods_float32, dods_int32> >
00225                (_buf, dynamic_cast<Int32 *>(b)->_buf, op);
00226     case dods_uint32_c:
00227         return rops<dods_float32, dods_uint32, Cmp<dods_float32, dods_uint32> >
00228                (_buf, dynamic_cast<UInt32 *>(b)->_buf, op);
00229     case dods_float32_c:
00230         return rops<dods_float32, dods_float32, Cmp<dods_float32, dods_float32> >
00231                (_buf, dynamic_cast<Float32 *>(b)->_buf, op);
00232     case dods_float64_c:
00233         return rops<dods_float32, dods_float64, Cmp<dods_float32, dods_float64> >
00234                (_buf, dynamic_cast<Float64 *>(b)->_buf, op);
00235     default:
00236         return false;
00237     }
00238 }
00239 
00248 void
00249 Float32::dump(ostream &strm) const
00250 {
00251     strm << DapIndent::LMarg << "Float32::dump - (" << (void *)this << ")"
00252          << endl ;
00253     DapIndent::Indent() ;
00254     BaseType::dump(strm) ;
00255     strm << DapIndent::LMarg << "value: " << _buf << endl ;
00256     DapIndent::UnIndent() ;
00257 }
00258 

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