libdap++  Updated for version 3.13.3
Str.h
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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 1995-1999
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 // Interface for Str type.
33 //
34 // jhrg 9/7/94
35 
36 #ifndef _str_h
37 #define _str_h 1
38 
39 #include <string>
40 
41 #include "dods-limits.h"
42 #include "BaseType.h"
43 
44 namespace libdap
45 {
46 
47 // max_str_len should be large since we always send strings with length bytes
48 // as a prefix (so xdr_string will always know how much memory to malloc) but
49 // if deserialize gets confused and thinks a ctor (in particular) is a string
50 // xdr_string in turn will max_str_len if it cannot get a length byte. A long
51 // term solution is to fix libdap, but strings should not routinely be > 32k
52 // for the time being... jhrg 4/30/97
53 
54 const unsigned int max_str_len = DODS_USHRT_MAX - 1;
55 
62 class Str: public BaseType
63 {
64 
65 protected:
66  string d_buf;
67 
68 public:
69  Str(const string &n);
70  Str(const string &n, const string &d);
71 
72  virtual ~Str()
73  {}
74 
75  Str(const Str &copy_from);
76 
77  Str &operator=(const Str &rhs);
78 
79  virtual BaseType *ptr_duplicate();
80 
81  virtual unsigned int width(bool constrained = false);
82 
83  // Return the length of the stored string or zero if no string has been
84  // stored in the instance's internal buffer.
85  unsigned int length();
86 
87  virtual bool serialize(ConstraintEvaluator &eval, DDS &dds,
88  Marshaller &m, bool ce_eval = true);
89  virtual bool deserialize(UnMarshaller &um, DDS *dds, bool reuse = false);
90 
91  virtual unsigned int val2buf(void *val, bool reuse = false);
92  virtual unsigned int buf2val(void **val);
93 
94  virtual bool set_value(const string &value);
95  virtual string value() const;
96 
97  virtual void print_val(FILE *out, string space = "",
98  bool print_decl_p = true);
99  virtual void print_val(ostream &out, string space = "",
100  bool print_decl_p = true);
101 
102  virtual bool ops(BaseType *b, int op);
103 
104  virtual void dump(ostream &strm) const ;
105 };
106 
107 } // namespace libdap
108 
109 #endif // _str_h
110 
virtual void print_val(FILE *out, string space="", bool print_decl_p=true)
Prints the value of the variable.
Definition: Str.cc:241
abstract base class used to unmarshall/deserialize dap data objects
Definition: UnMarshaller.h:54
virtual unsigned int val2buf(void *val, bool reuse=false)
Definition: Str.cc:205
virtual unsigned int width(bool constrained=false)
Definition: Str.cc:126
virtual BaseType * ptr_duplicate()
Definition: Str.cc:100
Str(const string &n)
Definition: Str.cc:80
Str & operator=(const Str &rhs)
Definition: Str.cc:106
virtual bool serialize(ConstraintEvaluator &eval, DDS &dds, Marshaller &m, bool ce_eval=true)
Move data to the net.
Definition: Str.cc:132
string d_buf
Definition: Str.h:66
Holds character string data.
Definition: Str.h:62
virtual bool deserialize(UnMarshaller &um, DDS *dds, bool reuse=false)
Receive data from the net.
Definition: Str.cc:160
virtual ~Str()
Definition: Str.h:72
virtual string value() const
Definition: Str.cc:235
const unsigned int max_str_len
Definition: Str.h:54
virtual bool ops(BaseType *b, int op)
Evaluate relational operators.
Definition: Str.cc:260
virtual bool set_value(const string &value)
Definition: Str.cc:224
Evaluate a constraint expression.
#define DODS_USHRT_MAX
Definition: dods-limits.h:70
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
virtual unsigned int buf2val(void **val)
Definition: Str.cc:177
virtual void dump(ostream &strm) const
dumps information about this object
Definition: Str.cc:301
unsigned int length()
Definition: Str.cc:120