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 
71 using std::cerr;
72 using std::endl;
73 
74 namespace libdap {
75 
84 Float64::Float64(const string &n) : BaseType(n, dods_float64_c), d_buf(0)
85 {}
86 
94 Float64::Float64(const string &n, const string &d) : BaseType(n, d, dods_float64_c), d_buf(0)
95 {}
96 
97 Float64::Float64(const Float64 &copy_from) : BaseType(copy_from)
98 {
99  d_buf = copy_from.d_buf;
100 }
101 
102 BaseType *
104 {
105  return new Float64(*this);
106 }
107 
108 Float64 &
109 Float64::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 
118 unsigned int
119 Float64::width(bool) const
120 {
121  return sizeof(dods_float64);
122 }
123 
124 bool
125 Float64::serialize(ConstraintEvaluator &eval, DDS &dds, Marshaller &m, bool ce_eval)
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 
143 bool
145 {
146  um.get_float64( d_buf ) ;
147 
148  return false;
149 }
150 
151 void
153 {
154  checksum.AddData(reinterpret_cast<uint8_t*>(&d_buf), sizeof(d_buf));
155 }
156 
165 void
166 Float64::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 
174 void
176 {
177  um.get_float64( d_buf ) ;
178 }
179 
180 unsigned int
181 Float64::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 
196 unsigned int
197 Float64::buf2val(void **val)
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 
217 dods_float64
219 {
220  return d_buf;
221 }
222 
223 bool
224 Float64::set_value(dods_float64 val)
225 {
226  d_buf = val;
227  set_read_p(true);
228 
229  return true;
230 }
231 
232 void
233 Float64::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 
240 void
241 Float64::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 
257 bool
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 
283 bool
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 }
330 void
331 Float64::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 string type_name() const
Returns the type of the class instance as a string.
Definition: BaseType.cc:375
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
virtual Type type() const
Returns the type of the class instance.
Definition: BaseType.cc:361
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
Definition: UnMarshaller.h:55
top level DAP object to house generic methods
Definition: AlarmHandler.h:36