libdap++  Updated for version 3.11.7
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 static char rcsid[] not_used =
40  { "$Id: Byte.cc 21699 2009-11-05 00:06:01Z jimg $"
41  };
42 
43 #include "Byte.h"
44 #include "Int16.h"
45 #include "UInt16.h"
46 #include "Int32.h"
47 #include "UInt32.h"
48 #include "Float32.h"
49 #include "Float64.h"
50 #include "Str.h"
51 #include "Url.h"
52 #include "Array.h"
53 #include "Structure.h"
54 #include "Sequence.h"
55 #include "Grid.h"
56 
57 #include "DDS.h"
58 #include "Operators.h"
59 
60 #include "util.h"
61 #include "parser.h"
62 #include "dods-limits.h"
63 #include "InternalErr.h"
64 
65 using std::cerr;
66 using std::endl;
67 
68 namespace libdap {
69 
79 Byte::Byte(const string & n): BaseType(n, dods_byte_c)
80 {}
81 
92 Byte::Byte(const string &n, const string &d): BaseType(n, d, dods_byte_c)
93 {}
94 
95 Byte::Byte(const Byte & copy_from): BaseType(copy_from)
96 {
97  _buf = copy_from._buf;
98 }
99 
101 {
102  return new Byte(*this);
103 }
104 
105 Byte & Byte::operator=(const Byte & rhs)
106 {
107  if (this == &rhs)
108  return *this;
109 
110  dynamic_cast < BaseType & >(*this) = rhs;
111 
112  _buf = rhs._buf;
113 
114  return *this;
115 }
116 
117 unsigned int Byte::width()
118 {
119  return sizeof(dods_byte);
120 }
121 
133  Marshaller &m, bool ce_eval)
134 {
135  dds.timeout_on();
136 
137  if (!read_p())
138  read(); // read() throws Error and InternalErr
139 
140 #if EVAL
141  if (ce_eval && !eval.eval_selection(dds, dataset()))
142  return true;
143 #endif
144 
145  dds.timeout_off();
146 
147  m.put_byte( _buf ) ;
148 
149  return true;
150 }
151 
156 {
157  um.get_byte( _buf ) ;
158 
159  return false;
160 }
161 
167 unsigned int Byte::val2buf(void *val, bool)
168 {
169  // Jose Garcia
170  // This method is public therefore and I believe it has being designed
171  // to be use by read which must be implemented on the surrogate library,
172  // thus if the pointer val is NULL, is an Internal Error.
173  if (!val)
174  throw InternalErr("the incoming pointer does not contain any data.");
175 
176  _buf = *(dods_byte *) val;
177 
178  return width();
179 }
180 
181 unsigned int Byte::buf2val(void **val)
182 {
183  // Jose Garcia
184  // The same comment justifying throwing an Error in val2buf applies here.
185  if (!val)
186  throw InternalErr("NULL pointer");
187 
188  if (!*val)
189  *val = new dods_byte;
190 
191  *(dods_byte *) * val = _buf;
192 
193  return width();
194 }
195 
201 {
202  _buf = value;
203  set_read_p(true);
204 
205  return true;
206 }
207 
211 {
212  return _buf;
213 }
214 
215 #if FILE_METHODS
216 void Byte::print_val(FILE * out, string space, bool print_decl_p)
217 {
218  if (print_decl_p) {
219  print_decl(out, space, false);
220  fprintf(out, " = %d;\n", (int) _buf);
221  }
222  else
223  fprintf(out, "%d", (int) _buf);
224 }
225 #endif
226 
227 void Byte::print_val(ostream &out, string space, bool print_decl_p)
228 {
229  if (print_decl_p) {
230  print_decl(out, space, false);
231  out << " = " << (int)_buf << ";\n" ;
232  }
233  else
234  out << (int)_buf ;
235 }
236 
237 bool Byte::ops(BaseType * b, int op)
238 {
239 
240  // Extract the Byte arg's value.
241  if (!read_p() && !read()) {
242  // Jose Garcia
243  // Since the read method is virtual and implemented outside
244  // libdap++ if we cannot read the data that is the problem
245  // of the user or of whoever wrote the surrogate library
246  // implementing read therefore it is an internal error.
247  throw InternalErr("This value not read!");
248  }
249  // Extract the second arg's value.
250  if (!b || !(b->read_p() || b->read())) {
251  // Jose Garcia
252  // Since the read method is virtual and implemented outside
253  // libdap++ if we cannot read the data that is the problem
254  // of the user or of whoever wrote the surrogate library
255  // implementing read therefore it is an internal error.
256  throw InternalErr("This value not read!");
257  }
258 
259  switch (b->type()) {
260  case dods_byte_c:
261  return rops < dods_byte, dods_byte, Cmp < dods_byte, dods_byte > >
262  (_buf, dynamic_cast < Byte * >(b)->_buf, op);
263  case dods_int16_c:
264  return rops < dods_byte, dods_int16, USCmp < dods_byte,
265  dods_int16 > > (_buf, dynamic_cast < Int16 * >(b)->_buf, op);
266  case dods_uint16_c:
267  return rops < dods_byte, dods_uint16, Cmp < dods_byte,
268  dods_uint16 > > (_buf, dynamic_cast < UInt16 * >(b)->_buf, op);
269  case dods_int32_c:
270  return rops < dods_byte, dods_int32, USCmp < dods_byte,
271  dods_int32 > > (_buf, dynamic_cast < Int32 * >(b)->_buf, op);
272  case dods_uint32_c:
273  return rops < dods_byte, dods_uint32, Cmp < dods_byte,
274  dods_uint32 > > (_buf, dynamic_cast < UInt32 * >(b)->_buf, op);
275  case dods_float32_c:
276  return rops < dods_byte, dods_float32, Cmp < dods_byte,
277  dods_float32 > > (_buf, dynamic_cast < Float32 * >(b)->_buf,
278  op);
279  case dods_float64_c:
280  return rops < dods_byte, dods_float64, Cmp < dods_byte,
281  dods_float64 > > (_buf, dynamic_cast < Float64 * >(b)->_buf,
282  op);
283  default:
284  return false;
285  }
286 }
287 
296 void Byte::dump(ostream & strm) const
297 {
298  strm << DapIndent::LMarg << "Byte::dump - ("
299  << (void *) this << ")" << endl;
301  BaseType::dump(strm);
302  strm << DapIndent::LMarg << "value: " << _buf << endl;
304 }
305 
306 } // namespace libdap