Str.h

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00001 
00002 // -*- mode: c++; c-basic-offset:4 -*-
00003 
00004 // This file is part of libdap, A C++ implementation of the OPeNDAP Data
00005 // Access Protocol.
00006 
00007 // Copyright (c) 2002,2003 OPeNDAP, Inc.
00008 // Author: James Gallagher <jgallagher@opendap.org>
00009 //
00010 // This library is free software; you can redistribute it and/or
00011 // modify it under the terms of the GNU Lesser General Public
00012 // License as published by the Free Software Foundation; either
00013 // version 2.1 of the License, or (at your option) any later version.
00014 //
00015 // This library is distributed in the hope that it will be useful,
00016 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00018 // Lesser General Public License for more details.
00019 //
00020 // You should have received a copy of the GNU Lesser General Public
00021 // License along with this library; if not, write to the Free Software
00022 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00023 //
00024 // You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
00025 
00026 // (c) COPYRIGHT URI/MIT 1995-1999
00027 // Please read the full copyright statement in the file COPYRIGHT_URI.
00028 //
00029 // Authors:
00030 //      jhrg,jimg       James Gallagher <jgallagher@gso.uri.edu>
00031 
00032 // Interface for Str type.
00033 //
00034 // jhrg 9/7/94
00035 
00036 #ifndef _str_h
00037 #define _str_h 1
00038 
00039 
00040 #ifdef WIN32
00041 #include <rpc.h>
00042 #include <winsock2.h>
00043 #include <xdr.h>
00044 #else
00045 #include <rpc/types.h>
00046 #include <netinet/in.h>
00047 #include <rpc/xdr.h>
00048 #endif
00049 
00050 #include <string>
00051 
00052 #include "dods-limits.h"
00053 #include "BaseType.h"
00054 
00055 
00056 // max_str_len should be large since we always send strings with length bytes
00057 // as a prefix (so xdr_string will always know how much memory to malloc) but
00058 // if deserialize gets confused and thinks a ctor (in particular) is a string
00059 // xdr_string in turn will max_str_len if it cannot get a length byte. A long
00060 // term solution is to fix libdap, but strings should not routinely be > 32k
00061 // for the time being... jhrg 4/30/97
00062 
00063 const unsigned int max_str_len = 32767; // DODS_UINT_MAX-1;
00064 
00071 class Str: public BaseType
00072 {
00073 
00074 protected:
00075     string _buf;
00076 
00077 public:
00078     Str(const string &n = "");
00079 
00080     virtual ~Str()
00081     {}
00082 
00083     Str(const Str &copy_from);
00084 
00085     Str &operator=(const Str &rhs);
00086 
00087     virtual BaseType *ptr_duplicate();
00088 
00089     virtual unsigned int width();
00090 
00091     // Return the length of the stored string or zero if no string has been
00092     // stored in the instance's internal buffer.
00093     unsigned int length();
00094 
00095     virtual bool serialize(const string &dataset, ConstraintEvaluator &eval,
00096                            DDS &dds, XDR *sink, bool ce_eval = true);
00097     virtual bool deserialize(XDR *source, DDS *dds, bool reuse = false);
00098 
00099     virtual unsigned int val2buf(void *val, bool reuse = false);
00100     virtual unsigned int buf2val(void **val);
00101 
00102     virtual bool set_value(const string &value);
00103     virtual string value() const;
00104 
00105     virtual void print_val(FILE *out, string space = "",
00106                            bool print_decl_p = true);
00107 
00108     virtual bool ops(BaseType *b, int op, const string &dataset);
00109 
00110     virtual void dump(ostream &strm) const ;
00111 };
00112 
00113 #endif // _str_h
00114 

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