libdap  Updated for version 3.17.2
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 #include <sstream>
39 #include <iomanip>
40 
41 #include "Byte.h" // synonymous with UInt8 and Char
42 #include "Int8.h"
43 #include "Int16.h"
44 #include "UInt16.h"
45 #include "Int32.h"
46 #include "UInt32.h"
47 #include "Int64.h"
48 #include "UInt64.h"
49 #include "Float32.h"
50 #include "Float64.h"
51 #include "Str.h"
52 #include "Url.h"
53 
54 #include "DDS.h"
55 #include "Marshaller.h"
56 #include "UnMarshaller.h"
57 
58 #include "DMR.h"
59 #include "D4StreamMarshaller.h"
60 #include "D4StreamUnMarshaller.h"
61 
62 #include "util.h"
63 #include "parser.h"
64 #include "Operators.h"
65 #include "dods-limits.h"
66 #include "InternalErr.h"
67 
68 
69 using std::cerr;
70 using std::endl;
71 
72 namespace libdap {
73 
82 Float64::Float64(const string &n) : BaseType(n, dods_float64_c), d_buf(0)
83 {}
84 
92 Float64::Float64(const string &n, const string &d) : BaseType(n, d, dods_float64_c), d_buf(0)
93 {}
94 
95 Float64::Float64(const Float64 &copy_from) : BaseType(copy_from)
96 {
97  d_buf = copy_from.d_buf;
98 }
99 
100 BaseType *
102 {
103  return new Float64(*this);
104 }
105 
106 Float64 &
107 Float64::operator=(const Float64 &rhs)
108 {
109  if (this == &rhs)
110  return *this;
111 
112  dynamic_cast<BaseType &>(*this) = rhs;
113 
114  d_buf = rhs.d_buf;
115 
116  return *this;
117 }
118 
119 unsigned int
120 Float64::width(bool) const
121 {
122  return sizeof(dods_float64);
123 }
124 
125 bool
126 Float64::serialize(ConstraintEvaluator &eval, DDS &dds, Marshaller &m, bool ce_eval)
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_float64( d_buf ) ;
140 
141  return true;
142 }
143 
144 bool
146 {
147  um.get_float64( d_buf ) ;
148 
149  return false;
150 }
151 
152 void
154 {
155  checksum.AddData(reinterpret_cast<uint8_t*>(&d_buf), sizeof(d_buf));
156 }
157 
166 void
167 Float64::serialize(D4StreamMarshaller &m, DMR &, /*ConstraintEvaluator &,*/ bool)
168 {
169  if (!read_p())
170  read(); // read() throws Error
171 
172  m.put_float64( d_buf ) ;
173 }
174 
175 void
177 {
178  um.get_float64( d_buf ) ;
179 }
180 
181 unsigned int
182 Float64::val2buf(void *val, bool)
183 {
184  // Jose Garcia
185  // This method is public therefore and I believe it has being designed
186  // to be use by read which must be implemented on the surrogated library,
187  // thus if the pointer val is NULL, is an Internal Error.
188  if (!val)
189  throw InternalErr(__FILE__, __LINE__,
190  "The incoming pointer does not contain any data.");
191 
192  d_buf = *(dods_float64 *)val;
193 
194  return width();
195 }
196 
197 unsigned int
198 Float64::buf2val(void **val)
199 {
200  // Jose Garcia
201  // The same comment justifying throwing an Error in val2buf applies here.
202  if (!val)
203  throw InternalErr(__FILE__, __LINE__, "NULL pointer.");
204 
205  if (!*val)
206  *val = new dods_float64;
207 
208  *(dods_float64 *)*val = d_buf;
209 
210  return width();
211 }
212 
218 dods_float64
220 {
221  return d_buf;
222 }
223 
224 bool
225 Float64::set_value(dods_float64 val)
226 {
227  d_buf = val;
228  set_read_p(true);
229 
230  return true;
231 }
232 
233 void
234 Float64::print_val(FILE *out, string space, bool print_decl_p)
235 {
236  ostringstream oss;
237  print_val(oss, space, print_decl_p);
238  fwrite(oss.str().data(), sizeof(char), oss.str().length(), out);
239 }
240 
241 void
242 Float64::print_val(ostream &out, string space, bool print_decl_p)
243 {
244  // Set the precision to 15 digits
245  std::streamsize prec = out.precision(15);
246 
247  if (print_decl_p) {
248  print_decl(out, space, false);
249  out << " = " << d_buf << ";\n";
250  }
251  else
252  out << d_buf;
253 
254  // reset the precision
255  out.precision(prec);
256 }
257 
258 bool
260 {
261  // Extract the Byte arg's value.
262  if (!read_p() && !read()) {
263  // Jose Garcia
264  // Since the read method is virtual and implemented outside
265  // libdap++ if we cannot read the data that is the problem
266  // of the user or of whoever wrote the surrogate library
267  // implemeting read therefore it is an internal error.
268  throw InternalErr(__FILE__, __LINE__, "This value not read!");
269  }
270 
271  // Extract the second arg's value.
272  if (!b->read_p() && !b->read()) {
273  // Jose Garcia
274  // Since the read method is virtual and implemented outside
275  // libdap++ if we cannot read the data that is the problem
276  // of the user or of whoever wrote the surrogate library
277  // implemeting read therefore it is an internal error.
278  throw InternalErr(__FILE__, __LINE__, "This value not read!");
279  }
280 
281  switch (b->type()) {
282  case dods_int8_c:
283  return Cmp<dods_float64, dods_int8>(op, d_buf, static_cast<Int8*>(b)->value());
284  case dods_byte_c:
285  return SUCmp<dods_float64, dods_byte>(op, d_buf, static_cast<Byte*>(b)->value());
286  case dods_int16_c:
287  return Cmp<dods_float64, dods_int16>(op, d_buf, static_cast<Int16*>(b)->value());
288  case dods_uint16_c:
289  return SUCmp<dods_float64, dods_uint16>(op, d_buf, static_cast<UInt16*>(b)->value());
290  case dods_int32_c:
291  return Cmp<dods_float64, dods_int32>(op, d_buf, static_cast<Int32*>(b)->value());
292  case dods_uint32_c:
293  return SUCmp<dods_float64, dods_uint32>(op, d_buf, static_cast<UInt32*>(b)->value());
294  case dods_int64_c:
295  return Cmp<dods_float64, dods_int64>(op, d_buf, static_cast<Int64*>(b)->value());
296  case dods_uint64_c:
297  return SUCmp<dods_float64, dods_uint64>(op, d_buf, static_cast<UInt64*>(b)->value());
298  case dods_float32_c:
299  return Cmp<dods_float64, dods_float32>(op, d_buf, static_cast<Float32*>(b)->value());
300  case dods_float64_c:
301  return Cmp<dods_float64, dods_float64>(op, d_buf, static_cast<Float64*>(b)->value());
302  default:
303  return false;
304  }
305 }
306 
315 void
316 Float64::dump(ostream &strm) const
317 {
318  strm << DapIndent::LMarg << "Float64::dump - ("
319  << (void *)this << ")" << endl ;
320  DapIndent::Indent() ;
321  BaseType::dump(strm) ;
322  strm << DapIndent::LMarg << "value: " << d_buf << endl ;
323  DapIndent::UnIndent() ;
324 }
325 
326 } // namespace libdap
327 
virtual bool read()
Read data into a local buffer.
Definition: BaseType.cc:820
Holds an 8-bit signed integer value.
Definition: Int8.h:42
Holds a64-bit signed integer.
Definition: Int64.h:49
virtual bool read_p()
Has this variable been read?
Definition: BaseType.cc:425
abstract base class used to unmarshall/deserialize dap data objects
Definition: UnMarshaller.h:54
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:924
virtual unsigned int buf2val(void **val)
Reads the class data.
Definition: Float64.cc:198
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:153
virtual bool deserialize(UnMarshaller &um, DDS *dds, bool reuse=false)
Receive data from the net.
Definition: Float64.cc:145
Read data from the stream made by D4StreamMarshaller.
virtual BaseType * ptr_duplicate()
Definition: Float64.cc:101
Holds an unsigned 16-bit integer.
Definition: UInt16.h:57
Definition: crc.h:76
BaseType(const string &n, const Type &t, bool is_dap4=false)
The BaseType constructor.
Definition: BaseType.cc:125
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:126
virtual Type type() const
Returns the type of the class instance.
Definition: BaseType.cc:310
virtual dods_float64 value() const
Definition: Float64.cc:219
Holds a 32-bit floating point value.
Definition: Float32.h:61
A class for software fault reporting.
Definition: InternalErr.h:64
virtual string dataset() const
Returns the name of the dataset used to create this instance.
Definition: BaseType.cc:303
virtual bool ops(BaseType *b, int op)
Evaluate relational operators.
Definition: Float64.cc:259
Marshaller that knows how to marshal/serialize dap data objects to a C++ iostream using DAP4&#39;s receiv...
Holds a 16-bit signed integer value.
Definition: Int16.h:59
virtual void dump(ostream &strm) const
dumps information about this object
Definition: BaseType.cc:236
Float64(const string &n)
Definition: Float64.cc:82
virtual void set_read_p(bool state)
Sets the value of the read_p property.
Definition: BaseType.cc:461
Holds a 64-bit unsigned integer.
Definition: UInt64.h:49
void AddData(const uint8_t *pData, const uint32_t length)
Definition: crc.h:98
virtual unsigned int val2buf(void *val, bool reuse=false)
Loads class data.
Definition: Float64.cc:182
Evaluate a constraint expression.
virtual void dump(ostream &strm) const
dumps information about this object
Definition: Float64.cc:316
The basic data type for the DODS DAP types.
Definition: BaseType.h:117
abstract base class used to marshal/serialize dap data objects
Definition: Marshaller.h:50
Holds a 64-bit (double precision) floating point value.
Definition: Float64.h:60
Holds a single byte.
Definition: Byte.h:60
bool eval_selection(DDS &dds, const std::string &dataset)
Evaluate a boolean-valued constraint expression. This is main method for the evaluator ans is called ...
virtual unsigned int width(bool constrained=false) const
How many bytes does this use Return the number of bytes of storage this variable uses. For scalar types, this is pretty simple (an int32 uses 4 bytes, etc.). For arrays and Constructors, it is a bit more complex. Note that a scalar String variable uses sizeof(String*) bytes, not the length of the string. In other words, the value returned is independent of the type. Also note width() of a String array returns the number of elements in the array times sizeof(String*). That is, each different array size is a different data type.
Definition: Float64.cc:120
Holds a 32-bit unsigned integer.
Definition: UInt32.h:59
virtual void print_val(FILE *out, string space="", bool print_decl_p=true)
Prints the value of the variable.
Definition: Float64.cc:234
Holds a 32-bit signed integer.
Definition: Int32.h:65