libdap Updated for version 3.20.10
libdap4 is an implementation of OPeNDAP's DAP protocol.
Float64.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 1994-1999
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 Float64.
33//
34// jhrg 9/7/94
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 "util.h"
65#include "parser.h"
66#include "Operators.h"
67#include "dods-limits.h"
68#include "InternalErr.h"
69#include "DapIndent.h"
70
71using std::cerr;
72using std::endl;
73
74namespace libdap {
75
84Float64::Float64(const string &n) : BaseType(n, dods_float64_c), d_buf(0)
85{}
86
94Float64::Float64(const string &n, const string &d) : BaseType(n, d, dods_float64_c), d_buf(0)
95{}
96
97Float64::Float64(const Float64 &copy_from) : BaseType(copy_from)
98{
99 d_buf = copy_from.d_buf;
100}
101
102BaseType *
104{
105 return new Float64(*this);
106}
107
108Float64 &
109Float64::operator=(const Float64 &rhs)
110{
111 if (this == &rhs)
112 return *this;
113 BaseType::operator=(rhs);
114 d_buf = rhs.d_buf;
115 return *this;
116}
117
118unsigned int
119Float64::width(bool) const
120{
121 return sizeof(dods_float64);
122}
123
124bool
126{
127#if USE_LOCAL_TIMEOUT_SCHEME
128 dds.timeout_on();
129#endif
130 if (!read_p())
131 read(); // read() throws Error and InternalErr
132
133 if (ce_eval && !eval.eval_selection(dds, dataset()))
134 return true;
135#if USE_LOCAL_TIMEOUT_SCHEME
136 dds.timeout_off();
137#endif
138 m.put_float64( d_buf ) ;
139
140 return true;
141}
142
143bool
145{
146 um.get_float64( d_buf ) ;
147
148 return false;
149}
150
151void
153{
154 checksum.AddData(reinterpret_cast<uint8_t*>(&d_buf), sizeof(d_buf));
155}
156
165void
166Float64::serialize(D4StreamMarshaller &m, DMR &, /*ConstraintEvaluator &,*/ bool)
167{
168 if (!read_p())
169 read(); // read() throws Error
170
171 m.put_float64( d_buf ) ;
172}
173
174void
176{
177 um.get_float64( d_buf ) ;
178}
179
180unsigned int
181Float64::val2buf(void *val, bool)
182{
183 // Jose Garcia
184 // This method is public therefore and I believe it has being designed
185 // to be use by read which must be implemented on the surrogated library,
186 // thus if the pointer val is NULL, is an Internal Error.
187 if (!val)
188 throw InternalErr(__FILE__, __LINE__,
189 "The incoming pointer does not contain any data.");
190
191 d_buf = *(dods_float64 *)val;
192
193 return width();
194}
195
196unsigned int
198{
199 // Jose Garcia
200 // The same comment justifying throwing an Error in val2buf applies here.
201 if (!val)
202 throw InternalErr(__FILE__, __LINE__, "NULL pointer.");
203
204 if (!*val)
205 *val = new dods_float64;
206
207 *(dods_float64 *)*val = d_buf;
208
209 return width();
210}
211
217dods_float64
219{
220 return d_buf;
221}
222
223bool
224Float64::set_value(dods_float64 val)
225{
226 d_buf = val;
227 set_read_p(true);
228
229 return true;
230}
231
232void
233Float64::print_val(FILE *out, string space, bool print_decl_p)
234{
235 ostringstream oss;
236 print_val(oss, space, print_decl_p);
237 fwrite(oss.str().data(), sizeof(char), oss.str().length(), out);
238}
239
240void
241Float64::print_val(ostream &out, string space, bool print_decl_p)
242{
243 // Set the precision to 15 digits
244 std::streamsize prec = out.precision(15);
245
246 if (print_decl_p) {
247 print_decl(out, space, false);
248 out << " = " << d_buf << ";\n";
249 }
250 else
251 out << d_buf;
252
253 // reset the precision
254 out.precision(prec);
255}
256
257bool
259{
260 // Extract the Byte arg's value.
261 if (!read_p() && !read()) {
262 // Jose Garcia
263 // Since the read method is virtual and implemented outside
264 // libdap++ if we cannot read the data that is the problem
265 // of the user or of whoever wrote the surrogate library
266 // implemeting read therefore it is an internal error.
267 throw InternalErr(__FILE__, __LINE__, "This value not read!");
268 }
269
270 // Extract the second arg's value.
271 if (!b || !(b->read_p() || b->read())) {
272 // Jose Garcia
273 // Since the read method is virtual and implemented outside
274 // libdap++ if we cannot read the data that is the problem
275 // of the user or of whoever wrote the surrogate library
276 // implemeting read therefore it is an internal error.
277 throw InternalErr(__FILE__, __LINE__, "This value not read!");
278 }
279
280 return d4_ops(b, op);
281}
282
283bool
285{
286 DBG(cerr << "b->typename(): " << b->type_name() << endl);
287
288 switch (b->type()) {
289 case dods_int8_c:
290 return Cmp<dods_float64, dods_int8>(op, d_buf, static_cast<Int8*>(b)->value());
291 case dods_byte_c:
292 return Cmp<dods_float64, dods_byte>(op, d_buf, static_cast<Byte*>(b)->value());
293 case dods_int16_c:
294 return Cmp<dods_float64, dods_int16>(op, d_buf, static_cast<Int16*>(b)->value());
295 case dods_uint16_c:
296 return Cmp<dods_float64, dods_uint16>(op, d_buf, static_cast<UInt16*>(b)->value());
297 case dods_int32_c:
298 return Cmp<dods_float64, dods_int32>(op, d_buf, static_cast<Int32*>(b)->value());
299 case dods_uint32_c:
300 return Cmp<dods_float64, dods_uint32>(op, d_buf, static_cast<UInt32*>(b)->value());
301 case dods_int64_c:
302 return Cmp<dods_float64, dods_int64>(op, d_buf, static_cast<Int64*>(b)->value());
303 case dods_uint64_c:
304 return Cmp<dods_float64, dods_uint64>(op, d_buf, static_cast<UInt64*>(b)->value());
305 case dods_float32_c:
306 // Note that this code casts the double (dods_float64) to a float because when
307 // real numbers are approximated using float or double, errors are larger in the float
308 // case, making <= and == operators fail. By casting to the smaller type, the
309 // same values have the same error and we can avoid using a range compare and a
310 // delta value.
311 return Cmp<dods_float32, dods_float32>(op, (float)d_buf, static_cast<Float32*>(b)->value());
312 case dods_float64_c:
313 return Cmp<dods_float64, dods_float64>(op, d_buf, static_cast<Float64*>(b)->value());
314 case dods_str_c:
315 case dods_url_c:
316 throw Error(malformed_expr, "Relational operators can only compare compatible types (number, string).");
317 default:
318 throw Error(malformed_expr, "Relational operators only work with scalar types.");
319 }
320
321}
330void
331Float64::dump(ostream &strm) const
332{
333 strm << DapIndent::LMarg << "Float64::dump - ("
334 << (void *)this << ")" << endl ;
335 DapIndent::Indent() ;
336 BaseType::dump(strm) ;
337 strm << DapIndent::LMarg << "value: " << d_buf << endl ;
338 DapIndent::UnIndent() ;
339}
340
341} // namespace libdap
342
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
Holds a 64-bit (double precision) floating point value.
Definition Float64.h:61
virtual void compute_checksum(Crc32 &checksum)
include the data for this variable in the checksum DAP4 includes a checksum with every data response....
Definition Float64.cc:152
virtual bool d4_ops(BaseType *b, int op)
Evaluator a relop for DAP4.
Definition Float64.cc:284
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 Float64.cc:119
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 Float64.cc:125
virtual bool ops(BaseType *b, int op)
Evaluate relational operators.
Definition Float64.cc:258
virtual unsigned int buf2val(void **val)
Reads the class data.
Definition Float64.cc:197
Float64(const string &n)
Definition Float64.cc:84
virtual unsigned int val2buf(void *val, bool reuse=false)
Loads class data.
Definition Float64.cc:181
virtual void print_val(FILE *out, string space="", bool print_decl_p=true)
Prints the value of the variable.
Definition Float64.cc:233
virtual bool deserialize(UnMarshaller &um, DDS *dds, bool reuse=false)
Receive data from the net.
Definition Float64.cc:144
virtual BaseType * ptr_duplicate()
Definition Float64.cc:103
virtual void dump(ostream &strm) const
dumps information about this object
Definition Float64.cc:331
virtual dods_float64 value() const
Definition Float64.cc:218
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