libdap++ Updated for version 3.8.2

DAS.cc

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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 1994-1999
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 // Methods for the class DAS - a class used to parse the dataset attribute
00033 // structure.
00034 //
00035 // jhrg 7/25/94
00036 
00037 #include "config.h"
00038 
00039 static char rcsid[] not_used =
00040     {"$Id: DAS.cc 22804 2010-05-19 18:28:46Z pwest $"
00041     };
00042 
00043 
00044 #include <cstdio>
00045 
00046 #ifdef HAVE_UNISTD_H
00047 #include <unistd.h>
00048 #endif
00049 
00050 #ifdef WIN32
00051 #include <io.h>
00052 #endif
00053 
00054 #include <iostream>
00055 #include <string>
00056 
00057 #include "DAS.h"
00058 #include "AttrTable.h"
00059 #include "Error.h"
00060 #include "InternalErr.h"
00061 #include "parser.h"
00062 #include "escaping.h"
00063 #include "debug.h"
00064 
00065 using std::cerr;
00066 using std::endl;
00067 
00068 // Glue routines declared in das.lex
00069 extern void das_switch_to_buffer(void *new_buffer);
00070 extern void das_delete_buffer(void * buffer);
00071 extern void *das_buffer(FILE *fp);
00072 
00073 extern void dasrestart(FILE *yyin);
00074 extern int dasparse(void *arg); // defined in das.tab.c
00075 
00076 namespace libdap {
00077 
00080 DAS::DAS() : DapObj(), d_container( 0 )
00081 {}
00082 
00090 /*
00091 DAS::DAS(AttrTable *attr, string name)
00092 {
00093     append_container(attr, www2id(name));
00094 }
00095 */
00096 
00097 // FIXME: Need to create copy constructor and op=.
00098 
00102 DAS::~DAS()
00103 {}
00104 
00108 string
00109 DAS::container_name()
00110 {
00111     return _container_name ;
00112 }
00113 
00119 void
00120 DAS::container_name( const string &cn )
00121 {
00122     // We want to find a top level attribute table with the given name. So
00123     // set d_container to null first so that we aren't searching some
00124     // previous container
00125     if( cn != _container_name )
00126     {
00127         d_container = 0 ;
00128         if( !cn.empty() )
00129         {
00130             d_container = get_table( cn ) ;
00131             if( !d_container )
00132             {
00133                 d_container = add_table( cn, new AttrTable ) ;
00134             }
00135         }
00136         _container_name = cn;
00137     }
00138 }
00139 
00145 AttrTable *
00146 DAS::container()
00147 {
00148     return d_container ;
00149 }
00150 
00157 unsigned int
00158 DAS::get_size() const
00159 {
00160     if( d_container )
00161     {
00162         return d_container->get_size() ;
00163     }
00164     return d_attrs.get_size() ;
00165 }
00166 
00169 void
00170 DAS::erase()
00171 {
00172     if( d_container )
00173     {
00174         d_container->erase() ;
00175     }
00176     else
00177     {
00178         d_attrs.erase() ;
00179     }
00180 }
00181 
00184 AttrTable::Attr_iter
00185 DAS::var_begin()
00186 {
00187     if( d_container )
00188     {
00189         return d_container->attr_begin() ;
00190     }
00191     return d_attrs.attr_begin() ;
00192 }
00193 
00197 AttrTable::Attr_iter
00198 DAS::var_end()
00199 {
00200     if( d_container )
00201     {
00202         return d_container->attr_end() ;
00203     }
00204     return d_attrs.attr_end() ;
00205 }
00206 
00209 string
00210 DAS::get_name(AttrTable::Attr_iter &i)
00211 {
00212     if( d_container )
00213     {
00214         return d_container->get_name( i ) ;
00215     }
00216     return d_attrs.get_name( i ) ;
00217 }
00218 
00221 AttrTable *
00222 DAS::get_table(AttrTable::Attr_iter &i)
00223 {
00224     if( d_container )
00225     {
00226         return d_container->get_attr_table( i ) ;
00227     }
00228     return d_attrs.get_attr_table( i ) ;
00229 }
00230 
00233 AttrTable *
00234 DAS::get_table( const string &name )
00235 {
00236     if( d_container )
00237     {
00238         return d_container->get_attr_table( name ) ;
00239     }
00240     return d_attrs.get_attr_table( name ) ;
00241 }
00242 
00244 
00249 
00253 AttrTable *
00254 DAS::add_table( const string &name, AttrTable *at )
00255 {
00256     if( d_container )
00257     {
00258         at->set_is_global_attribute( false ) ;
00259         return d_container->append_container( at, name ) ;
00260     }
00261     return d_attrs.append_container( at, name ) ;
00262 }
00263 
00265 
00271 
00272 
00277 void
00278 DAS::parse(string fname)
00279 {
00280     FILE *in = fopen(fname.c_str(), "r");
00281 
00282     if (!in) {
00283         throw Error(cannot_read_file, "Could not open: " + fname);
00284     }
00285 
00286     parse(in);
00287 
00288     int res = fclose(in);
00289     if (res) {
00290         DBG(cerr << "DAS::parse - Failed to close file " << (void *)in << endl ;) ;
00291     }
00292 }
00293 
00304 void
00305 DAS::parse(int fd)
00306 {
00307 #ifdef WIN32
00308     FILE *in = fdopen(_dup(fd), "r");
00309 #else
00310     FILE *in = fdopen(dup(fd), "r");
00311 #endif
00312 
00313     if (!in) {
00314         throw InternalErr(__FILE__, __LINE__, "Could not access file.");
00315     }
00316 
00317     parse(in);
00318 
00319     int res = fclose(in);
00320     if (res) {
00321         DBG(cerr << "DAS::parse(fd) - Failed to close " << (void *)in << endl ;) ;
00322     }
00323 }
00324 
00325 
00326 
00333 void
00334 DAS::parse(FILE *in)
00335 {
00336     if (!in) {
00337         throw InternalErr(__FILE__, __LINE__, "Null input stream.");
00338     }
00339 
00340     void *buffer = das_buffer(in);
00341     das_switch_to_buffer(buffer);
00342 
00343     parser_arg arg(this);
00344 
00345     bool status = dasparse((void *) & arg) == 0;
00346 
00347     das_delete_buffer(buffer);
00348 
00349     //  STATUS is the result of the parser function; if a recoverable error
00350     //  was found it will be true but arg.status() will be false.
00351     if (!status || !arg.status()) {// Check parse result
00352         if (arg.error())
00353             throw *arg.error();
00354     }
00355 }
00356 
00358 
00371 void
00372 DAS::print(FILE *out, bool dereference)
00373 {
00374     fprintf(out, "Attributes {\n") ;
00375 
00376     d_attrs.print(out, "    ", dereference);
00377 
00378     fprintf(out, "}\n") ;
00379 }
00380 
00393 void
00394 DAS::print(ostream &out, bool dereference)
00395 {
00396     out << "Attributes {\n" ;
00397 
00398     d_attrs.print(out, "    ", dereference);
00399 
00400     out << "}\n" ;
00401 }
00402 
00410 void
00411 DAS::dump(ostream &strm) const
00412 {
00413     strm << DapIndent::LMarg << "DAS::dump - ("
00414          << (void *)this << ")" << endl ;
00415     DapIndent::Indent() ;
00416     if( d_container )
00417     {
00418         strm << DapIndent::LMarg << "current container: " << _container_name
00419              << endl ;
00420     }
00421     else
00422     {
00423         strm << DapIndent::LMarg << "current container: NONE" << endl ;
00424     }
00425     d_attrs.dump(strm) ;
00426     DapIndent::UnIndent() ;
00427 }
00428 
00429 } // namespace libdap
00430