diff -r 000000000000 -r 1918ee327afb util/qlalr/recognizer.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/util/qlalr/recognizer.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,488 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the utils of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "recognizer.h"
+#include <cstdlib>
+#include <cstring>
+#include <cctype>
+
+Recognizer::Recognizer (Grammar *grammar, bool no_lines):
+  tos(0),
+  stack_size(0),
+  state_stack(0),
+  _M_line(1),
+  _M_action_line(0),
+  _M_grammar(grammar),
+  _M_no_lines(no_lines)
+{
+}
+
+Recognizer::~Recognizer()
+{
+  if (stack_size)
+    ::qFree(state_stack);
+}
+
+inline void Recognizer::reallocateStack()
+{
+  if (! stack_size)
+    stack_size = 128;
+  else
+    stack_size <<= 1;
+
+  sym_stack.resize (stack_size);
+
+  if (! state_stack)
+    state_stack = reinterpret_cast<int*> (::qMalloc(stack_size * sizeof(int)));
+  else
+    state_stack = reinterpret_cast<int*> (::qRealloc(state_stack, stack_size * sizeof(int)));
+}
+
+int Recognizer::nextToken()
+{
+  QString text;
+
+ Lagain:
+  while (ch.isSpace ())
+    inp ();
+  
+  if (ch.isNull ())
+    return EOF_SYMBOL;
+
+  int token = ch.unicode ();
+
+  if (token == '"')
+    {
+      inp(); // skip "
+      text.clear ();
+      while (! ch.isNull () && ch != QLatin1Char ('"'))
+        {
+          if (ch == QLatin1Char ('\\'))
+            {
+              text += ch;
+              inp();
+            }
+          text += ch;
+          inp ();
+        }
+
+      if (ch == QLatin1Char ('"'))
+        inp ();
+      else
+        qerr << _M_input_file << ":" << _M_line << ": Warning. Expected `\"'" << endl;
+
+      _M_current_value = text;
+      return (token = STRING_LITERAL);
+    }
+
+  else if (ch.isLetterOrNumber () || ch == QLatin1Char ('_'))
+    {
+      text.clear ();
+      do { text += ch; inp (); }
+      while (ch.isLetterOrNumber () || ch == QLatin1Char ('_') || ch == QLatin1Char ('.'));
+      _M_current_value = text;
+      return (token = ID);
+    }
+
+  else if (token == '%')
+    {
+      text.clear ();
+
+      do { inp (); }
+      while (ch.isSpace ());
+
+      do { text += ch; inp (); }
+      while (ch.isLetterOrNumber () || ch == QLatin1Char ('_') || ch == QLatin1Char ('-'));
+
+      if (text == QLatin1String("token_prefix"))
+        return (token = TOKEN_PREFIX);
+      else if (text == QLatin1String("merged_output"))
+        return (token = MERGED_OUTPUT);
+      else if (text == QLatin1String("token"))
+        return (token = TOKEN);
+      else if (text == QLatin1String("start"))
+        return (token = START);
+      else if (text == QLatin1String("parser"))
+        return (token = PARSER);
+      else if (text == QLatin1String("decl"))
+        return (token = DECL_FILE);
+      else if (text == QLatin1String("impl"))
+        return (token = IMPL_FILE);
+      else if (text == QLatin1String("expect"))
+        return (token = EXPECT);
+      else if (text == QLatin1String("expect-rr"))
+        return (token = EXPECT_RR);
+      else if (text == QLatin1String("left"))
+        return (token = LEFT);
+      else if (text == QLatin1String("right"))
+        return (token = RIGHT);
+      else if (text == QLatin1String("nonassoc"))
+        return (token = NONASSOC);
+      else if (text == QLatin1String("prec"))
+        return (token = PREC);
+      else
+        {
+          qerr << _M_input_file << ":" << _M_line << ": Unknown keyword `" << text << "'" << endl;
+          exit (EXIT_FAILURE);
+          return (token = ERROR);
+        }
+    }
+
+  inp ();
+
+  if (token == '-' && ch == QLatin1Char ('-'))
+    {
+      do { inp (); }
+      while (! ch.isNull () && ch != QLatin1Char ('\n'));
+      goto Lagain;
+    }
+
+  else if (token == ':' && ch == QLatin1Char (':'))
+    {
+      inp ();
+      if (ch != QLatin1Char ('='))
+        return (token = ERROR);
+      inp ();
+      return (token = COLON);
+    }
+
+  else if (token == '/' && ch == QLatin1Char (':'))
+    {
+      _M_action_line = _M_line;
+
+      text.clear ();
+      if (! _M_no_lines)
+        text += QLatin1String ("\n#line ") + QString::number (_M_action_line) + " \"" + _M_input_file + "\"\n";
+      inp (); // skip ':'
+
+      forever
+        {
+          while (! ch.isNull ())
+            {
+              token = ch.unicode ();
+              inp ();
+
+              if (token == ':' && ch == QLatin1Char ('/'))
+                break;
+
+              text += QLatin1Char (token);
+            }
+
+          if (ch != QLatin1Char ('/'))
+            return (token = ERROR);
+
+          inp ();
+
+          if (ch.isNull () || ch.isSpace ())
+            {
+              _M_current_value = text;
+              return (token = DECL);
+            }
+	  else
+	    text += QLatin1String (":/");
+        }
+    }
+
+  else if (token == '/' && ch == QLatin1Char ('.'))
+    {
+      _M_action_line = _M_line;
+
+      text.clear ();
+      if (! _M_no_lines)
+        text += QLatin1String ("\n#line ") + QString::number (_M_action_line) + " \"" + _M_input_file + "\"\n";
+
+      inp (); // skip ':'
+
+      forever
+        {
+          while (! ch.isNull ())
+            {
+              token = ch.unicode ();
+              inp ();
+
+              if (token == '.' && ch == QLatin1Char ('/'))
+                break;
+
+              text += QLatin1Char (token);
+            }
+
+          if (ch != QLatin1Char ('/'))
+            return (token = ERROR);
+
+          inp ();
+
+          if (ch.isNull () || ch.isSpace ())
+            {
+              _M_current_value = text;
+              return (token = IMPL);
+            }
+	  else
+	    text += QLatin1String ("");
+        }
+    }
+
+  switch (token) {
+  case ':':
+    return (token = COLON);
+
+  case ';':
+    return (token = SEMICOLON);
+
+  case '|':
+    return (token = OR);
+
+  default:
+    break;
+  }
+
+  return token;
+}
+
+bool Recognizer::parse (const QString &input_file)
+{
+  _M_input_file = input_file;
+
+  QFile file(_M_input_file);
+  if (! file.open(QFile::ReadOnly))
+    {
+      qerr << "qlalr: no input file\n";
+      return false;
+    }
+
+  QString _M_contents = QTextStream(&file).readAll();
+  _M_firstChar = _M_contents.constBegin();
+  _M_lastChar = _M_contents.constEnd();
+  _M_currentChar = _M_firstChar;
+  _M_line = 1;
+
+  int yytoken = -1;
+  inp ();
+
+  reallocateStack();
+
+  _M_current_rule = _M_grammar->rules.end ();
+  _M_decls.clear ();
+  _M_impls.clear ();
+
+  tos = 0;
+  state_stack[++tos] = 0;
+
+  while (true)
+    {
+      if (yytoken == -1 && - TERMINAL_COUNT != action_index [state_stack [tos]])
+        yytoken = nextToken();
+
+      int act = t_action (state_stack [tos], yytoken);
+
+      if (act == ACCEPT_STATE)
+        return true;
+
+      else if (act > 0)
+        {
+          if (++tos == stack_size)
+            reallocateStack();
+
+          sym_stack [tos] = _M_current_value;
+          state_stack [tos] = act;
+          yytoken = -1;
+        }
+
+      else if (act < 0)
+        {
+          int r = - act - 1;
+
+          tos -= rhs [r];
+          act = state_stack [tos++];
+
+          switch (r) {
+
+case 3: {
+  Name name = _M_grammar->intern (sym(2));
+  _M_grammar->start = name;
+  _M_grammar->non_terminals.insert (name);
+} break;
+
+case 5: {
+  _M_grammar->table_name = sym(2);
+} break;
+
+case 6: {
+  _M_grammar->merged_output = sym(2);
+} break;
+
+case 7: {
+   _M_grammar->decl_file_name = sym(2);
+} break;
+
+case 8: {
+   _M_grammar->impl_file_name = sym(2);
+} break;
+
+case 9: {
+   _M_grammar->expected_shift_reduce = sym(2).toInt();
+} break;
+
+case 10: {
+   _M_grammar->expected_reduce_reduce = sym(2).toInt();
+} break;
+
+case 11: {
+  _M_grammar->token_prefix = sym(2);
+} break;
+case 17:case 18: {
+  Name name = _M_grammar->intern (sym(1));
+  _M_grammar->terminals.insert (name);
+  _M_grammar->spells.insert (name, sym(2));
+} break;
+
+case 19: {
+  _M_grammar->current_assoc = Grammar::Left;
+  ++_M_grammar->current_prec;
+} break;
+
+case 20: {
+  _M_grammar->current_assoc = Grammar::Right;
+  ++_M_grammar->current_prec;
+} break;
+
+case 21: {
+  _M_grammar->current_assoc = Grammar::NonAssoc;
+  ++_M_grammar->current_prec;
+} break;
+
+case 25: {
+  Name name = _M_grammar->intern (sym(1));
+  _M_grammar->terminals.insert (name);
+
+  Grammar::TokenInfo info;
+  info.prec = _M_grammar->current_prec;
+  info.assoc = _M_grammar->current_assoc;
+  _M_grammar->token_info.insert (name, info);
+} break;
+
+case 26: {
+  _M_decls += expand (sym(1));
+} break;
+
+case 27: {
+  _M_impls += expand (sym(1));
+} break;
+
+case 34: {
+  _M_current_rule = _M_grammar->rules.insert (_M_grammar->rules.end (), Rule ());
+  _M_current_rule->lhs = _M_grammar->intern (sym(1));
+  _M_grammar->declared_lhs.insert (_M_current_rule->lhs);
+
+  if (_M_grammar->terminals.find (_M_current_rule->lhs) != _M_grammar->terminals.end ())
+    {
+      qerr << _M_input_file << ":" << _M_line << ": Invalid non terminal `" << *_M_current_rule->lhs << "'" << endl;
+      return false;
+    }
+
+  _M_grammar->non_terminals.insert (_M_current_rule->lhs);
+} break;
+
+case 38: {
+  Name lhs = _M_current_rule->lhs;
+  _M_current_rule = _M_grammar->rules.insert (_M_grammar->rules.end (), Rule ());
+  _M_current_rule->lhs = lhs;
+  _M_grammar->declared_lhs.insert (_M_current_rule->lhs);
+
+  if (_M_grammar->terminals.find (_M_current_rule->lhs) != _M_grammar->terminals.end ())
+    {
+      qerr << _M_input_file << ":" << _M_line << ": Invalid non terminal `" << *_M_current_rule->lhs << "'" << endl;
+      return false;
+    }
+
+  _M_grammar->non_terminals.insert (_M_current_rule->lhs);
+} break;
+
+case 39: {
+  _M_current_rule->prec = _M_grammar->names.end ();
+
+  for (NameList::iterator it = _M_current_rule->rhs.begin (); it != _M_current_rule->rhs.end (); ++it)
+    {
+      if (! _M_grammar->isTerminal (*it))
+        continue;
+
+      _M_current_rule->prec = *it;
+    }
+} break;
+
+case 40: {
+  Name tok = _M_grammar->intern (sym(2));
+  if (! _M_grammar->isTerminal (tok))
+    {
+      qerr << _M_input_file << ":" << _M_line << ": `" << *tok << " is not a terminal symbol" << endl;
+      _M_current_rule->prec = _M_grammar->names.end ();
+    }
+  else
+    _M_current_rule->prec = tok;
+} break;
+
+case 42: {
+  Name name = _M_grammar->intern (sym(2));
+
+  if (_M_grammar->terminals.find (name) == _M_grammar->terminals.end ())
+    _M_grammar->non_terminals.insert (name);
+
+  _M_current_rule->rhs.push_back (name);
+} break;
+
+case 43: {
+  sym(1) = QString();
+} break;
+
+          } // switch
+
+          state_stack [tos] = nt_action (act, lhs [r] - TERMINAL_COUNT);
+        }
+      
+      else
+        {
+          break;
+        }
+    }
+
+  qerr << _M_input_file << ":" << _M_line << ": Syntax error" << endl;
+  return false;
+}
+