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+// parser.cc
+// marvin - programme du robot 2006. {{{
+//
+// Copyright (C) 2006 Nicolas Schodet
+//
+// Robot APB Team/Efrei 2006.
+// Web: http://assos.efrei.fr/robot/
+// Email: robot AT efrei DOT fr
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+//
+// }}}
+#include "parser.hh"
+
+#include "yyparser.hh"
+#include "yylexer.hh"
+
+#include <stdexcept>
+#include <sstream>
+
+int yyparse (void *);
+
+/// Constructeur.
+Parser::Parser (void)
+{
+}
+
+/// Destructeur
+Parser::~Parser (void)
+{
+}
+
+/// Lance le parseur sur un fichier.
+void
+Parser::parseFile (const std::string &file)
+{
+ FILE *f;
+ f = fopen (file.c_str (), "r");
+ if (!f)
+ throw std::runtime_error ("can not open file \"" + file + "\"");
+ try
+ {
+ // Crée un scanner, initialise son tampon d'entré, puis parse.
+ yyscan_t scanner;
+ YY_BUFFER_STATE buf;
+ Extra e (*this, true);
+ yylex_init (&scanner);
+ yyset_extra (&e, scanner);
+ buf = yy_create_buffer (f, YY_READ_BUF_SIZE, scanner);
+ yy_switch_to_buffer (buf, scanner);
+ int ret = yyparse (scanner);
+ yy_delete_buffer (buf, scanner);
+ yylex_destroy (scanner);
+ if (ret)
+ {
+ if (!e.error_.empty ())
+ throw std::runtime_error (e.error_);
+ else
+ throw std::runtime_error ("parse error");
+ }
+ }
+ catch (const std::exception &e)
+ {
+ fclose (f);
+ throw std::runtime_error ("in file \"" + file + "\": " + e.what ());
+ }
+ fclose (f);
+}
+
+/// Lance le parseur sur une chaîne.
+void
+Parser::parseString (const std::string &s)
+{
+ try
+ {
+ // Crée un scanner, initialise son tampon d'entré, puis parse.
+ yyscan_t scanner;
+ YY_BUFFER_STATE buf;
+ Extra e (*this, false);
+ yylex_init (&scanner);
+ yyset_extra (&e, scanner);
+ buf = yy_scan_bytes (s.data (), s.size (), scanner);
+ int ret = yyparse (scanner);
+ yy_delete_buffer (buf, scanner);
+ yylex_destroy (scanner);
+ if (ret)
+ {
+ if (!e.error_.empty ())
+ throw std::runtime_error (e.error_);
+ else
+ throw std::runtime_error ("parse error");
+ }
+ }
+ catch (const std::exception &e)
+ {
+ throw std::runtime_error ("in string \"" + s + "\": " + e.what ());
+ }
+}
+
+/// Fonction appelée lors d'une affectation. VAL peut être modifié, il est
+/// détruit suite à l'appel.
+void
+Parser::assign (const std::string &id, any &val)
+{
+ throw std::runtime_error ("unexpected assignement");
+}
+
+/// Fonction appelée lors d'un appel. ARGS peut être modifié, il est
+/// détruit suite à l'appel.
+void
+Parser::call (const std::string &id, AnyList &args)
+{
+ throw std::runtime_error ("unexpected call");
+}
+
+/// Constructeur pour initialiser les références.
+Parser::Extra::Extra (Parser &parser, bool useLine)
+ : line (1), parser_ (parser), useLine_ (useLine)
+{
+}
+
+/// Recueille l'erreur de bison.
+void
+Parser::Extra::error (const std::string &e)
+{
+ if (error_.empty ())
+ {
+ error_ = e;
+ if (useLine_)
+ {
+ std::stringstream os;
+ os << line;
+ error_ += ", line ";
+ error_ += os.str ();
+ }
+ }
+}
+
+/// Fonction appelée lors d'une affectation par bison.
+bool
+Parser::Extra::assign (const std::string &id, any &val)
+{
+ try
+ {
+ parser_.assign (id, val);
+ }
+ catch (const std::exception &e)
+ {
+ error (e.what ());
+ return false;
+ }
+ return true;
+}
+
+/// Fonction appelée lors d'un appel par bison.
+bool
+Parser::Extra::call (const std::string &id, AnyList &args)
+{
+ try
+ {
+ parser_.call (id, args);
+ }
+ catch (const std::exception &e)
+ {
+ error (e.what ());
+ return false;
+ }
+ return true;
+}
+
+/* Shut up warning for this wrongly declared static function. */
+static int
+yy_init_globals (yyscan_t yyscanner)
+{
+ return yy_init_globals (yyscanner);
+}
+