libdap Updated for version 3.20.10
libdap4 is an implementation of OPeNDAP's DAP protocol.
Float32.cc
1
2// -*- mode: c++; c-basic-offset:4 -*-
3
4// This file is part of libdap, A C++ implementation of the OPeNDAP Data
5// Access Protocol.
6
7// Copyright (c) 2002,2003 OPeNDAP, Inc.
8// Author: James Gallagher <jgallagher@opendap.org>
9//
10// This library is free software; you can redistribute it and/or
11// modify it under the terms of the GNU Lesser General Public
12// License as published by the Free Software Foundation; either
13// version 2.1 of the License, or (at your option) any later version.
14//
15// This library is distributed in the hope that it will be useful,
16// but WITHOUT ANY WARRANTY; without even the implied warranty of
17// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18// Lesser General Public License for more details.
19//
20// You should have received a copy of the GNU Lesser General Public
21// License along with this library; if not, write to the Free Software
22// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23//
24// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
25
26// (c) COPYRIGHT URI/MIT 1999
27// Please read the full copyright statement in the file COPYRIGHT_URI.
28//
29// Authors:
30// jhrg,jimg James Gallagher <jgallagher@gso.uri.edu>
31
32// Implementation for Float32.
33//
34// 3/22/99 jhrg
35
36#include "config.h"
37
38//#define DODS_DEBUG
39
40#include <sstream>
41#include <iomanip>
42
43#include "Byte.h" // synonymous with UInt8 and Char
44#include "Int8.h"
45#include "Int16.h"
46#include "UInt16.h"
47#include "Int32.h"
48#include "UInt32.h"
49#include "Int64.h"
50#include "UInt64.h"
51#include "Float32.h"
52#include "Float64.h"
53#include "Str.h"
54#include "Url.h"
55
56#include "DDS.h"
57#include "Marshaller.h"
58#include "UnMarshaller.h"
59
60#include "DMR.h"
61#include "D4StreamMarshaller.h"
62#include "D4StreamUnMarshaller.h"
63
64#include "parser.h"
65#include "Operators.h"
66#include "dods-limits.h"
67#include "InternalErr.h"
68
69#include "util.h"
70#include "debug.h"
71#include "DapIndent.h"
72
73using std::cerr;
74using std::endl;
75
76namespace libdap {
77
85Float32::Float32(const string &n) : BaseType(n, dods_float32_c), d_buf(0)
86{}
87
95Float32::Float32(const string &n, const string &d) : BaseType(n, d, dods_float32_c), d_buf(0)
96{}
97
98Float32::Float32(const Float32 &copy_from) : BaseType(copy_from)
99{
100 d_buf = copy_from.d_buf;
101}
102
103BaseType *
105{
106 return new Float32(*this);
107}
108
109Float32 &
110Float32::operator=(const Float32 &rhs)
111{
112 if (this == &rhs)
113 return *this;
114 BaseType::operator=(rhs);
115 d_buf = rhs.d_buf;
116 return *this;
117}
118
119unsigned int
120Float32::width(bool) const
121{
122 return sizeof(dods_float32);
123}
124
125bool
127{
128#if USE_LOCAL_TIMEOUT_SCHEME
129 dds.timeout_on();
130#endif
131 if (!read_p())
132 read(); // read() throws Error and InternalErr
133
134 if (ce_eval && !eval.eval_selection(dds, dataset()))
135 return true;
136#if USE_LOCAL_TIMEOUT_SCHEME
137 dds.timeout_off();
138#endif
139 m.put_float32( d_buf ) ;
140
141 return true;
142}
143
144bool
146{
147 um.get_float32( d_buf ) ;
148
149 return false;
150}
151
152void
154{
155 checksum.AddData(reinterpret_cast<uint8_t*>(&d_buf), sizeof(d_buf));
156}
157
166void
167Float32::serialize(D4StreamMarshaller &m, DMR &, /*ConstraintEvaluator &,*/ bool)
168{
169 if (!read_p())
170 read(); // read() throws Error
171
172 m.put_float32( d_buf ) ;
173}
174
175void
177{
178 um.get_float32( d_buf ) ;
179}
180
181unsigned int
182Float32::val2buf(void *val, bool)
183{
184 // Jose Garcia This method is public I believe it has been
185 // designed to be used by read which must be implemented in a
186 // subclass, thus if the pointer val is NULL, is an Internal
187 // Error.
188 // Changed to InternalErr. jhrg
189 if (!val)
190 throw InternalErr(__FILE__, __LINE__,
191 "The incoming pointer does not contain any data.");
192
193 d_buf = *(dods_float32 *)val;
194
195 return width();
196}
197
198unsigned int
200{
201 // Jose Garcia
202 // The same comment justifying throwing an Error in val2buf applies here.
203 if (!val)
204 throw InternalErr(__FILE__, __LINE__, "NULL pointer.");
205
206 if (!*val)
207 *val = new dods_float32;
208
209 *(dods_float32 *)*val = d_buf;
210
211 return width();
212}
213
214bool
215Float32::set_value(dods_float32 f)
216{
217 d_buf = f;
218 set_read_p(true);
219
220 return true;
221}
222
228dods_float32
230{
231 return d_buf;
232}
233
234void
235Float32::print_val(FILE *out, string space, bool print_decl_p)
236{
237 ostringstream oss;
238 print_val(oss, space, print_decl_p);
239 fwrite(oss.str().data(), sizeof(char), oss.str().length(), out);
240}
241
242void
243Float32::print_val(ostream &out, string space, bool print_decl_p)
244{
245 // FIX: need to set precision in the printing somehow.
246 // os.precision(DODS_FLT_DIG);
247
248 if (print_decl_p) {
249 print_decl(out, space, false);
250 out << " = " << std::setprecision( 6 ) << d_buf << ";\n" ;
251 }
252 else
253 out << std::setprecision( 6 ) << d_buf ;
254}
255
256bool
258{
259 // Get this instance's value
260 if (!read_p() && !read()) {
261 // Jose Garcia Since the read method is virtual and
262 // implemented outside libdap++ if we cannot read the data
263 // that is the problem of whomever wrote the implementation of
264 // read and therefore it is an internal error.
265 throw InternalErr(__FILE__, __LINE__, "This value not read!");
266 }
267
268 // Extract the second arg's value.
269 if (!b || !(b->read_p() || b->read())) {
270 throw InternalErr(__FILE__, __LINE__, "This value not read!");
271 }
272
273 return d4_ops(b, op);
274}
275
279bool Float32::d4_ops(BaseType *b, int op)
280{
281 DBG(cerr << "b->typename(): " << b->type_name() << endl);
282
283 switch (b->type()) {
284 case dods_int8_c:
285 return Cmp<dods_float32, dods_int8>(op, d_buf, static_cast<Int8*>(b)->value());
286 case dods_byte_c:
287 return Cmp<dods_float32, dods_byte>(op, d_buf, static_cast<Byte*>(b)->value());
288 case dods_int16_c:
289 return Cmp<dods_float32, dods_int16>(op, d_buf, static_cast<Int16*>(b)->value());
290 case dods_uint16_c:
291 return Cmp<dods_float32, dods_uint16>(op, d_buf, static_cast<UInt16*>(b)->value());
292 case dods_int32_c:
293 return Cmp<dods_float32, dods_int32>(op, d_buf, static_cast<Int32*>(b)->value());
294 case dods_uint32_c:
295 return Cmp<dods_float32, dods_uint32>(op, d_buf, static_cast<UInt32*>(b)->value());
296 case dods_int64_c:
297 return Cmp<dods_float32, dods_int64>(op, d_buf, static_cast<Int64*>(b)->value());
298 case dods_uint64_c:
299 return Cmp<dods_float32, dods_uint64>(op, d_buf, static_cast<UInt64*>(b)->value());
300 case dods_float32_c:
301 return Cmp<dods_float32, dods_float32>(op, d_buf, static_cast<Float32*>(b)->value());
302 case dods_float64_c:
303 DBG(cerr << "arg1: " << d_buf << " " << op << " arg2: " << static_cast<Float64*>(b)->value() << endl);
304 // See the code in Float64::d4_ops() for an explanation of this odd-looking cast.
305 return Cmp<dods_float32, dods_float32>(op, d_buf, (float)static_cast<Float64*>(b)->value());
306 case dods_str_c:
307 case dods_url_c:
308 throw Error(malformed_expr, "Relational operators can only compare compatible types (number, string).");
309 default:
310 throw Error(malformed_expr, "Relational operators only work with scalar types.");
311 }
312}
313
322void
323Float32::dump(ostream &strm) const
324{
325 strm << DapIndent::LMarg << "Float32::dump - (" << (void *)this << ")"
326 << endl ;
327 DapIndent::Indent() ;
328 BaseType::dump(strm) ;
329 strm << DapIndent::LMarg << "value: " << d_buf << endl ;
330 DapIndent::UnIndent() ;
331}
332
333} // namespace libdap
334
Definition crc.h:77
void AddData(const uint8_t *pData, const uint32_t length)
Definition crc.h:98
The basic data type for the DODS DAP types.
Definition BaseType.h:118
virtual bool read()
Read data into a local buffer.
Definition BaseType.cc:895
virtual void print_decl(FILE *out, string space=" ", bool print_semi=true, bool constraint_info=false, bool constrained=false)
Print an ASCII representation of the variable structure.
Definition BaseType.cc:999
virtual bool read_p()
Has this variable been read?
Definition BaseType.cc:476
virtual void set_read_p(bool state)
Sets the value of the read_p property.
Definition BaseType.cc:512
virtual string dataset() const
Returns the name of the dataset used to create this instance.
Definition BaseType.cc:354
void dump(ostream &strm) const override
dumps information about this object
Definition BaseType.cc:287
Holds a single byte.
Definition Byte.h:61
Evaluate a constraint expression.
bool eval_selection(DDS &dds, const std::string &dataset)
Evaluate a boolean-valued constraint expression. This is main method for the evaluator and is called ...
Marshaller that knows how to marshal/serialize dap data objects to a C++ iostream using DAP4's receiv...
Read data from the stream made by D4StreamMarshaller.
A class for error processing.
Definition Error.h:94
Holds a 32-bit floating point value.
Definition Float32.h:62
virtual BaseType * ptr_duplicate()
Definition Float32.cc:104
virtual void compute_checksum(Crc32 &checksum)
include the data for this variable in the checksum DAP4 includes a checksum with every data response....
Definition Float32.cc:153
virtual unsigned int val2buf(void *val, bool reuse=false)
Loads class data.
Definition Float32.cc:182
virtual bool d4_ops(BaseType *b, int op)
Definition Float32.cc:279
Float32(const string &n)
Definition Float32.cc:85
virtual void print_val(FILE *out, string space="", bool print_decl_p=true)
Prints the value of the variable.
Definition Float32.cc:235
virtual dods_float32 value() const
Definition Float32.cc:229
virtual bool deserialize(UnMarshaller &um, DDS *dds, bool reuse=false)
Receive data from the net.
Definition Float32.cc:145
virtual void dump(ostream &strm) const
dumps information about this object
Definition Float32.cc:323
virtual bool ops(BaseType *b, int op)
Evaluate relational operators.
Definition Float32.cc:257
virtual unsigned int width(bool constrained=false) const
How many bytes does this variable use Return the number of bytes of storage this variable uses....
Definition Float32.cc:120
virtual bool serialize(ConstraintEvaluator &eval, DDS &dds, Marshaller &m, bool ce_eval=true)
Move data to the net, then remove them from the object.
Definition Float32.cc:126
virtual unsigned int buf2val(void **val)
Reads the class data.
Definition Float32.cc:199
Holds a 64-bit (double precision) floating point value.
Definition Float64.h:61
Holds a 16-bit signed integer value.
Definition Int16.h:60
Holds a 32-bit signed integer.
Definition Int32.h:66
Holds a64-bit signed integer.
Definition Int64.h:50
Holds an 8-bit signed integer value.
Definition Int8.h:43
A class for software fault reporting.
Definition InternalErr.h:65
abstract base class used to marshal/serialize dap data objects
Definition Marshaller.h:50
Holds an unsigned 16-bit integer.
Definition UInt16.h:58
Holds a 32-bit unsigned integer.
Definition UInt32.h:60
Holds a 64-bit unsigned integer.
Definition UInt64.h:50
abstract base class used to unmarshall/deserialize dap data objects
top level DAP object to house generic methods