rlgen-ruby/rbx-gotocodegen.h

   1 /*
   2  *  Copyright 2007 Victor Hugo Borja <vic@rubyforge.org>
   3  *            2006-2007 Adrian Thurston <thurston@cs.queensu.ca>
   4  */
   5
   6 /*  This file is part of Ragel.
   7  *
   8  *  Ragel is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  Ragel is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with Ragel; if not, write to the Free Software
  20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #ifndef _RBX_GOTOCODEGEN_H
  24 #define _RBX_GOTOCODEGEN_H
  25
  26 #include <iostream>
  27 #include <string>
  28 #include "ruby-codegen.h"
  29
  30 using std::string;
  31
  32 class RbxGotoCodeGen : public RubyCodeGen
  33 {
  34 public:
  35         RbxGotoCodeGen( ostream &out ) : RubyCodeGen(out) {}
  36         virtual ~RbxGotoCodeGen() {}
  37
  38         std::ostream &TO_STATE_ACTION_SWITCH();
  39         std::ostream &FROM_STATE_ACTION_SWITCH();
  40         std::ostream &EOF_ACTION_SWITCH();
  41         std::ostream &ACTION_SWITCH();
  42         std::ostream &STATE_GOTOS();
  43         std::ostream &TRANSITIONS();
  44         std::ostream &EXEC_FUNCS();
  45         std::ostream &FINISH_CASES();
  46
  47         void GOTO( ostream &ret, int gotoDest, bool inFinish );
  48         void CALL( ostream &ret, int callDest, int targState, bool inFinish );
  49         void NEXT( ostream &ret, int nextDest, bool inFinish );
  50         void GOTO_EXPR( ostream &ret, GenInlineItem *ilItem, bool inFinish );
  51         void NEXT_EXPR( ostream &ret, GenInlineItem *ilItem, bool inFinish );
  52         void CALL_EXPR( ostream &ret, GenInlineItem *ilItem, int targState, bool inFinish );
  53         void CURS( ostream &ret, bool inFinish );
  54         void TARGS( ostream &ret, bool inFinish, int targState );
  55         void RET( ostream &ret, bool inFinish );
  56         void BREAK( ostream &ret, int targState );
  57
  58         int TO_STATE_ACTION( RedStateAp *state );
  59         int FROM_STATE_ACTION( RedStateAp *state );
  60         int EOF_ACTION( RedStateAp *state );
  61
  62         void COND_TRANSLATE( GenStateCond *stateCond, int level );
  63         void emitCondBSearch( RedStateAp *state, int level, int low, int high );
  64         void STATE_CONDS( RedStateAp *state, bool genDefault );
  65
  66         virtual std::ostream &TRANS_GOTO( RedTransAp *trans, int level );
  67
  68         void emitSingleSwitch( RedStateAp *state );
  69         void emitRangeBSearch( RedStateAp *state, int level, int low, int high );
  70
  71         /* Called from STATE_GOTOS just before writing the gotos */
  72         virtual void GOTO_HEADER( RedStateAp *state );
  73         virtual void STATE_GOTO_ERROR();
  74
  75         virtual void writeData();
  76         virtual void writeEOF();
  77         virtual void writeExec();
  78
  79
  80         std::ostream &TO_STATE_ACTIONS();
  81         std::ostream &FROM_STATE_ACTIONS();
  82         std::ostream &EOF_ACTIONS();
  83
  84 private:
  85         ostream &rbxGoto(ostream &out, string label);
  86         ostream &rbxLabel(ostream &out, string label);
  87 };
  88
  89 /*
  90  * Local Variables:
  91  * mode: c++
  92  * indent-tabs-mode: 1
  93  * c-file-style: "bsd"
  94  * End:
  95  */
  96
  97 #endif