libdap++  Updated for version 3.13.3
Byte.cc
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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 Byte.
33 //
34 // jhrg 9/7/94
35 
36 
37 #include "config.h"
38 
39 #include <sstream>
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 "Operators.h"
56 #include "Marshaller.h"
57 #include "UnMarshaller.h"
58 
59 #include "util.h"
60 #include "parser.h"
61 #include "dods-limits.h"
62 #include "InternalErr.h"
63 
64 using std::cerr;
65 using std::endl;
66 
67 namespace libdap {
68 
78 Byte::Byte(const string & n): BaseType(n, dods_byte_c)
79 {}
80 
91 Byte::Byte(const string &n, const string &d): BaseType(n, d, dods_byte_c)
92 {}
93 
94 Byte::Byte(const Byte & copy_from): BaseType(copy_from)
95 {
96  d_buf = copy_from.d_buf;
97 }
98 
100 {
101  return new Byte(*this);
102 }
103 
104 Byte & Byte::operator=(const Byte & rhs)
105 {
106  if (this == &rhs)
107  return *this;
108 
109  dynamic_cast < BaseType & >(*this) = rhs;
110 
111  d_buf = rhs.d_buf;
112 
113  return *this;
114 }
115 
116 unsigned int Byte::width(bool)
117 {
118  return sizeof(dods_byte);
119 }
120 
132  Marshaller &m, bool ce_eval)
133 {
134  dds.timeout_on();
135 
136  if (!read_p())
137  read(); // read() throws Error and InternalErr
138 
139 #if EVAL
140  if (ce_eval && !eval.eval_selection(dds, dataset()))
141  return true;
142 #endif
143 
144  dds.timeout_off();
145 
146  m.put_byte( d_buf ) ;
147 
148  return true;
149 }
150 
155 {
156  um.get_byte( d_buf ) ;
157 
158  return false;
159 }
160 
166 unsigned int Byte::val2buf(void *val, bool)
167 {
168  // Jose Garcia
169  // This method is public therefore and I believe it has being designed
170  // to be use by read which must be implemented on the surrogate library,
171  // thus if the pointer val is NULL, is an Internal Error.
172  if (!val)
173  throw InternalErr("the incoming pointer does not contain any data.");
174 
175  d_buf = *(dods_byte *) val;
176 
177  return width();
178 }
179 
180 unsigned int Byte::buf2val(void **val)
181 {
182  // Jose Garcia
183  // The same comment justifying throwing an Error in val2buf applies here.
184  if (!val)
185  throw InternalErr("NULL pointer");
186 
187  if (!*val)
188  *val = new dods_byte;
189 
190  *(dods_byte *) * val = d_buf;
191 
192  return width();
193 }
194 
200 {
201  d_buf = value;
202  set_read_p(true);
203 
204  return true;
205 }
206 
210 {
211  return d_buf;
212 }
213 
214 void Byte::print_val(FILE * out, string space, bool print_decl_p)
215 {
216  ostringstream oss;
217  print_val(oss, space, print_decl_p);
218  fwrite(oss.str().data(), sizeof(char), oss.str().length(), out);
219 }
220 
221 void Byte::print_val(ostream &out, string space, bool print_decl_p)
222 {
223  if (print_decl_p) {
224  print_decl(out, space, false);
225  out << " = " << (int) d_buf << ";\n";
226  }
227  else
228  out << (int) d_buf;
229 }
230 
231 bool Byte::ops(BaseType * b, int op)
232 {
233 
234  // Extract the Byte arg's value.
235  if (!read_p() && !read()) {
236  // Jose Garcia
237  // Since the read method is virtual and implemented outside
238  // libdap++ if we cannot read the data that is the problem
239  // of the user or of whoever wrote the surrogate library
240  // implementing read therefore it is an internal error.
241  throw InternalErr("This value not read!");
242  }
243  // Extract the second arg's value.
244  if (!b || !(b->read_p() || b->read())) {
245  // Jose Garcia
246  // Since the read method is virtual and implemented outside
247  // libdap++ if we cannot read the data that is the problem
248  // of the user or of whoever wrote the surrogate library
249  // implementing read therefore it is an internal error.
250  throw InternalErr("This value not read!");
251  }
252 
253  switch (b->type()) {
254  case dods_int8_c:
255  return USCmp<dods_byte, dods_int8>(op, d_buf, static_cast<Int8*>(b)->value());
256  case dods_byte_c:
257  return Cmp<dods_byte, dods_byte>(op, d_buf, static_cast<Byte*>(b)->value());
258  case dods_int16_c:
259  return USCmp<dods_byte, dods_int16>(op, d_buf, static_cast<Int16*>(b)->value());
260  case dods_uint16_c:
261  return Cmp<dods_byte, dods_uint16>(op, d_buf, static_cast<UInt16*>(b)->value());
262  case dods_int32_c:
263  return USCmp<dods_byte, dods_int32>(op, d_buf, static_cast<Int32*>(b)->value());
264  case dods_uint32_c:
265  return Cmp<dods_byte, dods_uint32>(op, d_buf, static_cast<UInt32*>(b)->value());
266  case dods_int64_c:
267  return USCmp<dods_byte, dods_int64>(op, d_buf, static_cast<Int64*>(b)->value());
268  case dods_uint64_c:
269  return Cmp<dods_byte, dods_uint64>(op, d_buf, static_cast<UInt64*>(b)->value());
270  case dods_float32_c:
271  return USCmp<dods_byte, dods_float32>(op, d_buf, static_cast<Float32*>(b)->value());
272  case dods_float64_c:
273  return USCmp<dods_byte, dods_float64>(op, d_buf, static_cast<Float64*>(b)->value());
274  default:
275  return false;
276  }
277 }
278 
287 void Byte::dump(ostream & strm) const
288 {
289  strm << DapIndent::LMarg << "Byte::dump - ("
290  << (void *) this << ")" << endl;
292  BaseType::dump(strm);
293  strm << DapIndent::LMarg << "value: " << d_buf << endl;
295 }
296 
297 } // namespace libdap
virtual bool read()
Read data into a local buffer.
Definition: BaseType.cc:923
Holds a 16-bit signed integer value.
Definition: Int8.h:42
virtual void get_byte(dods_byte &val)=0
Holds a64-bit signed integer.
Definition: Int64.h:49
virtual bool read_p()
Has this variable been read?
Definition: BaseType.cc:579
virtual dods_byte value() const
Definition: Byte.cc:209
static void UnIndent()
Definition: DapIndent.cc:51
abstract base class used to unmarshall/deserialize dap data objects
Definition: UnMarshaller.h:54
virtual unsigned int buf2val(void **val)
Reads the class data.
Definition: Byte.cc:180
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:985
uint8_t dods_byte
bool deserialize(UnMarshaller &um, DDS *, bool)
Deserialize the char on stdin and put the result in _BUF.
Definition: Byte.cc:154
Byte(const string &n)
The Byte constructor.
Definition: Byte.cc:78
bool serialize(ConstraintEvaluator &eval, DDS &dds, Marshaller &m, bool ce_eval)
Definition: Byte.cc:131
Holds an unsigned 16-bit integer.
Definition: UInt16.h:57
dods_byte d_buf
Definition: Byte.h:63
void timeout_off()
Definition: DDS.cc:862
Type type() const
Returns the type of the class instance.
Definition: BaseType.cc:282
Holds a 32-bit floating point value.
Definition: Float32.h:59
A class for software fault reporting.
Definition: InternalErr.h:64
string dataset() const
Returns the name of the dataset used to create this instance.
Definition: BaseType.cc:275
bool eval_selection(DDS &dds, const string &dataset)
Evaluate a boolean-valued constraint expression. This is main method for the evaluator ans is called ...
virtual unsigned int val2buf(void *val, bool reuse=false)
Definition: Byte.cc:166
Holds a 16-bit signed integer value.
Definition: Int16.h:57
static void Indent()
Definition: DapIndent.cc:45
Byte & operator=(const Byte &rhs)
Definition: Byte.cc:104
virtual void dump(ostream &strm) const
dumps information about this object
Definition: BaseType.cc:230
virtual void set_read_p(bool state)
Sets the value of the read_p property.
Definition: BaseType.cc:618
virtual bool set_value(const dods_byte value)
Definition: Byte.cc:199
virtual void dump(ostream &strm) const
dumps information about this object
Definition: Byte.cc:287
Holds a 64-bit unsigned integer.
Definition: UInt64.h:49
void timeout_on()
Definition: DDS.cc:854
virtual void print_val(FILE *out, string space="", bool print_decl_p=true)
Prints the value of the variable.
Definition: Byte.cc:214
virtual unsigned int width(bool constrained=false)
Definition: Byte.cc:116
Evaluate a constraint expression.
virtual void put_byte(dods_byte val)=0
static ostream & LMarg(ostream &strm)
Definition: DapIndent.cc:80
The basic data type for the DODS DAP types.
Definition: BaseType.h:199
abstract base class used to marshal/serialize dap data objects
Definition: Marshaller.h:53
Holds a 64-bit (double precision) floating point value.
Definition: Float64.h:60
Holds a single byte.
Definition: Byte.h:60
virtual bool ops(BaseType *b, int op)
Evaluate relational operators.
Definition: Byte.cc:231
Holds a 32-bit unsigned integer.
Definition: UInt32.h:59
Holds a 32-bit signed integer.
Definition: Int32.h:64
virtual BaseType * ptr_duplicate()
Definition: Byte.cc:99