libdap Updated for version 3.21.0
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
118bool
120{
121#if USE_LOCAL_TIMEOUT_SCHEME
122 dds.timeout_on();
123#endif
124 if (!read_p())
125 read(); // read() throws Error and InternalErr
126
127 if (ce_eval && !eval.eval_selection(dds, dataset()))
128 return true;
129#if USE_LOCAL_TIMEOUT_SCHEME
130 dds.timeout_off();
131#endif
132 m.put_float64( d_buf ) ;
133
134 return true;
135}
136
137bool
139{
140 um.get_float64( d_buf ) ;
141
142 return false;
143}
144
145void
147{
148 checksum.AddData(reinterpret_cast<uint8_t*>(&d_buf), sizeof(d_buf));
149}
150
159void
160Float64::serialize(D4StreamMarshaller &m, DMR &, /*ConstraintEvaluator &,*/ bool)
161{
162 if (!read_p())
163 read(); // read() throws Error
164
165 m.put_float64( d_buf ) ;
166}
167
168void
170{
171 um.get_float64( d_buf ) ;
172}
173
174unsigned int
175Float64::val2buf(void *val, bool)
176{
177 // Jose Garcia
178 // This method is public therefore and I believe it has being designed
179 // to be use by read which must be implemented on the surrogated library,
180 // thus if the pointer val is NULL, is an Internal Error.
181 if (!val)
182 throw InternalErr(__FILE__, __LINE__,
183 "The incoming pointer does not contain any data.");
184
185 d_buf = *(dods_float64 *)val;
186
187 return width();
188}
189
190unsigned int
192{
193 // Jose Garcia
194 // The same comment justifying throwing an Error in val2buf applies here.
195 if (!val)
196 throw InternalErr(__FILE__, __LINE__, "NULL pointer.");
197
198 if (!*val)
199 *val = new dods_float64;
200
201 *(dods_float64 *)*val = d_buf;
202
203 return width();
204}
205
211dods_float64
213{
214 return d_buf;
215}
216
217bool
218Float64::set_value(dods_float64 val)
219{
220 d_buf = val;
221 set_read_p(true);
222
223 return true;
224}
225
226void
227Float64::print_val(FILE *out, string space, bool print_decl_p)
228{
229 ostringstream oss;
230 print_val(oss, space, print_decl_p);
231 fwrite(oss.str().data(), sizeof(char), oss.str().length(), out);
232}
233
234void
235Float64::print_val(ostream &out, string space, bool print_decl_p)
236{
237 // Set the precision to 15 digits
238 std::streamsize prec = out.precision(15);
239
240 if (print_decl_p) {
241 print_decl(out, space, false);
242 out << " = " << d_buf << ";\n";
243 }
244 else
245 out << d_buf;
246
247 // reset the precision
248 out.precision(prec);
249}
250
251bool
253{
254 // Extract the Byte arg's value.
255 if (!read_p() && !read()) {
256 // Jose Garcia
257 // Since the read method is virtual and implemented outside
258 // libdap++ if we cannot read the data that is the problem
259 // of the user or of whoever wrote the surrogate library
260 // implemeting read therefore it is an internal error.
261 throw InternalErr(__FILE__, __LINE__, "This value not read!");
262 }
263
264 // Extract the second arg's value.
265 if (!b || !(b->read_p() || b->read())) {
266 // Jose Garcia
267 // Since the read method is virtual and implemented outside
268 // libdap++ if we cannot read the data that is the problem
269 // of the user or of whoever wrote the surrogate library
270 // implemeting read therefore it is an internal error.
271 throw InternalErr(__FILE__, __LINE__, "This value not read!");
272 }
273
274 return d4_ops(b, op);
275}
276
277bool
279{
280 DBG(cerr << "b->typename(): " << b->type_name() << endl);
281
282 switch (b->type()) {
283 case dods_int8_c:
284 return Cmp<dods_float64, dods_int8>(op, d_buf, static_cast<Int8*>(b)->value());
285 case dods_byte_c:
286 return Cmp<dods_float64, dods_byte>(op, d_buf, static_cast<Byte*>(b)->value());
287 case dods_int16_c:
288 return Cmp<dods_float64, dods_int16>(op, d_buf, static_cast<Int16*>(b)->value());
289 case dods_uint16_c:
290 return Cmp<dods_float64, dods_uint16>(op, d_buf, static_cast<UInt16*>(b)->value());
291 case dods_int32_c:
292 return Cmp<dods_float64, dods_int32>(op, d_buf, static_cast<Int32*>(b)->value());
293 case dods_uint32_c:
294 return Cmp<dods_float64, dods_uint32>(op, d_buf, static_cast<UInt32*>(b)->value());
295 case dods_int64_c:
296 return Cmp<dods_float64, dods_int64>(op, d_buf, static_cast<Int64*>(b)->value());
297 case dods_uint64_c:
298 return Cmp<dods_float64, dods_uint64>(op, d_buf, static_cast<UInt64*>(b)->value());
299 case dods_float32_c:
300 // Note that this code casts the double (dods_float64) to a float because when
301 // real numbers are approximated using float or double, errors are larger in the float
302 // case, making <= and == operators fail. By casting to the smaller type, the
303 // same values have the same error and we can avoid using a range compare and a
304 // delta value.
305 return Cmp<dods_float32, dods_float32>(op, (float)d_buf, static_cast<Float32*>(b)->value());
306 case dods_float64_c:
307 return Cmp<dods_float64, dods_float64>(op, d_buf, static_cast<Float64*>(b)->value());
308 case dods_str_c:
309 case dods_url_c:
310 throw Error(malformed_expr, "Relational operators can only compare compatible types (number, string).");
311 default:
312 throw Error(malformed_expr, "Relational operators only work with scalar types.");
313 }
314
315}
324void
325Float64::dump(ostream &strm) const
326{
327 strm << DapIndent::LMarg << "Float64::dump - ("
328 << (void *)this << ")" << endl ;
329 DapIndent::Indent() ;
330 BaseType::dump(strm) ;
331 strm << DapIndent::LMarg << "value: " << d_buf << endl ;
332 DapIndent::UnIndent() ;
333}
334
335} // namespace libdap
336
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:120
virtual string type_name() const
Returns the type of the class instance as a string.
Definition BaseType.cc:376
virtual bool read()
Read data into a local buffer.
Definition BaseType.cc:905
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:1009
virtual bool read_p()
Has this variable been read?
Definition BaseType.cc:477
virtual void set_read_p(bool state)
Sets the value of the read_p property.
Definition BaseType.cc:513
virtual string dataset() const
Returns the name of the dataset used to create this instance.
Definition BaseType.cc:355
void dump(ostream &strm) const override
dumps information about this object
Definition BaseType.cc:287
virtual Type type() const
Returns the type of the class instance.
Definition BaseType.cc:362
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
unsigned int width(bool=false) const override
How many bytes does this variable use Return the number of bytes of storage this variable uses....
Definition Float64.h:77
Float64(const string &n)
Definition Float64.cc:84
bool deserialize(UnMarshaller &um, DDS *dds, bool reuse=false) override
Receive data from the net.
Definition Float64.cc:138
bool d4_ops(BaseType *b, int op) override
Evaluator a relop for DAP4.
Definition Float64.cc:278
bool ops(BaseType *b, int op) override
Evaluate relational operators.
Definition Float64.cc:252
unsigned int val2buf(void *val, bool reuse=false) override
Loads class data.
Definition Float64.cc:175
void dump(ostream &strm) const override
dumps information about this object
Definition Float64.cc:325
unsigned int buf2val(void **val) override
Reads the class data.
Definition Float64.cc:191
bool serialize(ConstraintEvaluator &eval, DDS &dds, Marshaller &m, bool ce_eval=true) override
Move data to the net, then remove them from the object.
Definition Float64.cc:119
void print_val(FILE *out, string space="", bool print_decl_p=true) override
Prints the value of the variable.
Definition Float64.cc:227
BaseType * ptr_duplicate() override
Definition Float64.cc:103
virtual dods_float64 value() const
Definition Float64.cc:212
void compute_checksum(Crc32 &checksum) override
include the data for this variable in the checksum DAP4 includes a checksum with every data response....
Definition Float64.cc:146
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
Definition AISConnect.cc:30