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 24886 2011-09-13 22:58:35Z jimg $"
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 
00083 #if 0
00084 DAS::DAS(AttrTable *attr, string name)
00085 {
00086     append_container(attr, www2id(name));
00087 }
00088 #endif
00089 
00090 // FIXME: Need to create copy constructor and op=.
00091 
00095 DAS::~DAS()
00096 {}
00097 
00101 string
00102 DAS::container_name()
00103 {
00104     return _container_name ;
00105 }
00106 
00112 void DAS::container_name(const string &cn)
00113 {
00114     // We want to find a top level attribute table with the given name. So
00115     // set d_container to null first so that we aren't searching some
00116     // previous container
00117     if (cn != _container_name) {
00118         d_container = 0;
00119         if (!cn.empty()) {
00120             d_container = get_table(cn);
00121             if (!d_container) {
00122                 d_container = add_table(cn, new AttrTable);
00123             }
00124         }
00125         _container_name = cn;
00126     }
00127 }
00128 
00134 AttrTable *
00135 DAS::container()
00136 {
00137     return d_container ;
00138 }
00139 
00146 unsigned int DAS::get_size() const
00147 {
00148     if (d_container) {
00149         return d_container->get_size();
00150     }
00151     return d_attrs.get_size();
00152 }
00153 
00156 void DAS::erase()
00157 {
00158     if (d_container) {
00159         d_container->erase();
00160     }
00161     else {
00162         d_attrs.erase();
00163     }
00164 }
00165 
00168 AttrTable::Attr_iter DAS::var_begin()
00169 {
00170     if (d_container) {
00171         return d_container->attr_begin();
00172     }
00173     return d_attrs.attr_begin();
00174 }
00175 
00179 AttrTable::Attr_iter DAS::var_end()
00180 {
00181     if (d_container) {
00182         return d_container->attr_end();
00183     }
00184     return d_attrs.attr_end();
00185 }
00186 
00189 string DAS::get_name(AttrTable::Attr_iter &i)
00190 {
00191     if (d_container) {
00192         return d_container->get_name(i);
00193     }
00194     return d_attrs.get_name(i);
00195 }
00196 
00199 AttrTable *
00200 DAS::get_table(AttrTable::Attr_iter &i)
00201 {
00202     if (d_container) {
00203         return d_container->get_attr_table(i);
00204     }
00205     return d_attrs.get_attr_table(i);
00206 }
00207 
00210 AttrTable *
00211 DAS::get_table(const string &name)
00212 {
00213     if (d_container) {
00214         return d_container->get_attr_table(name);
00215     }
00216     return d_attrs.get_attr_table(name);
00217 }
00218 
00220 
00225 
00229 AttrTable *
00230 DAS::add_table( const string &name, AttrTable *at )
00231 {
00232     if (d_container) {
00233         at->set_is_global_attribute(false);
00234         return d_container->append_container(at, name);
00235     }
00236     return d_attrs.append_container( at, name ) ;
00237 }
00238 
00240 
00246 
00247 
00252 void
00253 DAS::parse(string fname)
00254 {
00255     FILE *in = fopen(fname.c_str(), "r");
00256 
00257     if (!in) {
00258         throw Error(cannot_read_file, "Could not open: " + fname);
00259     }
00260 
00261     parse(in);
00262 
00263     int res = fclose(in);
00264     if (res) {
00265         DBG(cerr << "DAS::parse - Failed to close file " << (void *)in << endl ;) ;
00266     }
00267 }
00268 
00279 void
00280 DAS::parse(int fd)
00281 {
00282 #ifdef WIN32
00283     FILE *in = fdopen(_dup(fd), "r");
00284 #else
00285     FILE *in = fdopen(dup(fd), "r");
00286 #endif
00287 
00288     if (!in) {
00289         throw InternalErr(__FILE__, __LINE__, "Could not access file.");
00290     }
00291 
00292     parse(in);
00293 
00294     int res = fclose(in);
00295     if (res) {
00296         DBG(cerr << "DAS::parse(fd) - Failed to close " << (void *)in << endl ;) ;
00297     }
00298 }
00299 
00300 
00301 
00308 void
00309 DAS::parse(FILE *in)
00310 {
00311     if (!in) {
00312         throw InternalErr(__FILE__, __LINE__, "Null input stream.");
00313     }
00314 
00315     void *buffer = das_buffer(in);
00316     das_switch_to_buffer(buffer);
00317 
00318     parser_arg arg(this);
00319 
00320     bool status = dasparse((void *) & arg) == 0;
00321 
00322     das_delete_buffer(buffer);
00323 
00324     //  STATUS is the result of the parser function; if a recoverable error
00325     //  was found it will be true but arg.status() will be false.
00326     if (!status || !arg.status()) {// Check parse result
00327         if (arg.error())
00328             throw *arg.error();
00329     }
00330 }
00331 
00333 
00346 void
00347 DAS::print(FILE *out, bool dereference)
00348 {
00349     fprintf(out, "Attributes {\n") ;
00350 
00351     d_attrs.print(out, "    ", dereference);
00352 
00353     fprintf(out, "}\n") ;
00354 }
00355 
00368 void
00369 DAS::print(ostream &out, bool dereference)
00370 {
00371     out << "Attributes {\n" ;
00372 
00373     d_attrs.print(out, "    ", dereference);
00374 
00375     out << "}\n" ;
00376 }
00377 
00385 void
00386 DAS::dump(ostream &strm) const
00387 {
00388     strm << DapIndent::LMarg << "DAS::dump - ("
00389          << (void *)this << ")" << endl ;
00390     DapIndent::Indent() ;
00391     if( d_container )
00392     {
00393         strm << DapIndent::LMarg << "current container: " << _container_name
00394              << endl ;
00395     }
00396     else
00397     {
00398         strm << DapIndent::LMarg << "current container: NONE" << endl ;
00399     }
00400     d_attrs.dump(strm) ;
00401     DapIndent::UnIndent() ;
00402 }
00403 
00404 } // namespace libdap
00405