ragel-6.9ragel-6.9

1 files changed, 744 insertions, 0 deletions

diff --git a/ragel/mlcodegen.cpp b/ragel/mlcodegen.cpp
new file mode 100644
index 0000000..f8268d6
--- /dev/null
+++ b/ragel/mlcodegen.cpp
@@ -0,0 +1,744 @@
+/*
+ *  Copyright 2001-2006 Adrian Thurston <thurston@complang.org>
+ *            2004 Erich Ocean <eric.ocean@ampede.com>
+ *            2005 Alan West <alan@alanz.com>
+ */
+
+/*  This file is part of Ragel.
+ *
+ *  Ragel 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.
+ * 
+ *  Ragel 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 Ragel; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
+
+#include "ragel.h"
+#include "mlcodegen.h"
+#include "redfsm.h"
+#include "gendata.h"
+#include <sstream>
+#include <iomanip>
+#include <string>
+#include <assert.h>
+
+using std::ostream;
+using std::ostringstream;
+using std::string;
+using std::cerr;
+using std::endl;
+
+using std::istream;
+using std::ifstream;
+using std::ostream;
+using std::ios;
+using std::cin;
+using std::cout;
+using std::cerr;
+using std::endl;
+
+void ocamlLineDirective( ostream &out, const char *fileName, int line )
+{
+	if ( noLineDirectives )
+		return;
+
+	/* Write the line info for to the input file. */
+	out << "# " << line << " \"";
+	for ( const char *pc = fileName; *pc != 0; pc++ ) {
+		if ( *pc == '\\' || *pc == '"' )
+			out << "\\";
+  	out << *pc;
+	}
+	out << "\"\n";
+}
+
+void OCamlCodeGen::genLineDirective( ostream &out )
+{
+	std::streambuf *sbuf = out.rdbuf();
+	output_filter *filter = static_cast<output_filter*>(sbuf);
+	ocamlLineDirective( out, filter->fileName, filter->line + 1 );
+}
+
+
+/* Init code gen with in parameters. */
+OCamlCodeGen::OCamlCodeGen( ostream &out )
+:
+	CodeGenData(out)
+{
+}
+
+unsigned int OCamlCodeGen::arrayTypeSize( unsigned long maxVal )
+{
+	long long maxValLL = (long long) maxVal;
+	HostType *arrayType = keyOps->typeSubsumes( maxValLL );
+	assert( arrayType != 0 );
+	return arrayType->size;
+}
+
+string OCamlCodeGen::ARRAY_TYPE( unsigned long maxVal )
+{
+	return ARRAY_TYPE( maxVal, false );
+}
+
+string OCamlCodeGen::ARRAY_TYPE( unsigned long maxVal, bool forceSigned )
+{
+	long long maxValLL = (long long) maxVal;
+	HostType *arrayType;
+	if (forceSigned)
+		arrayType = keyOps->typeSubsumes(true, maxValLL);
+	else
+		arrayType = keyOps->typeSubsumes( maxValLL );
+	assert( arrayType != 0 );
+
+	string ret = arrayType->data1;
+	if ( arrayType->data2 != 0 ) {
+		ret += " ";
+		ret += arrayType->data2;
+	}
+	return ret;
+}
+
+/* Write out the fsm name. */
+string OCamlCodeGen::FSM_NAME()
+{
+	return fsmName;
+}
+
+/* Emit the offset of the start state as a decimal integer. */
+string OCamlCodeGen::START_STATE_ID()
+{
+	ostringstream ret;
+	ret << redFsm->startState->id;
+	return ret.str();
+};
+
+/* Write out the array of actions. */
+std::ostream &OCamlCodeGen::ACTIONS_ARRAY()
+{
+	out << "\t0; ";
+	int totalActions = 1;
+	for ( GenActionTableMap::Iter act = redFsm->actionMap; act.lte(); act++ ) {
+		/* Write out the length, which will never be the last character. */
+		out << act->key.length() << ARR_SEP();
+		/* Put in a line break every 8 */
+		if ( totalActions++ % 8 == 7 )
+			out << "\n\t";
+
+		for ( GenActionTable::Iter item = act->key; item.lte(); item++ ) {
+			out << item->value->actionId;
+			if ( ! (act.last() && item.last()) )
+				out << ARR_SEP();
+
+			/* Put in a line break every 8 */
+			if ( totalActions++ % 8 == 7 )
+				out << "\n\t";
+		}
+	}
+	out << "\n";
+	return out;
+}
+
+
+/*
+string OCamlCodeGen::ACCESS()
+{
+	ostringstream ret;
+	if ( accessExpr != 0 )
+		INLINE_LIST( ret, accessExpr, 0, false );
+	return ret.str();
+}
+*/
+
+string OCamlCodeGen::make_access(char const* name, GenInlineList* x, bool prefix = true)
+{ 
+	ostringstream ret;
+	if ( x == 0 )
+  {
+    if (prefix && accessExpr != 0)
+    {
+      INLINE_LIST( ret, accessExpr, 0, false);
+      ret << name;
+    }
+    else
+      ret << name << ".contents"; // ref cell
+  }
+	else {
+		ret << "(";
+		INLINE_LIST( ret, x, 0, false );
+		ret << ")";
+	}
+	return ret.str();
+}
+
+string OCamlCodeGen::P() { return make_access("p", pExpr, false); }
+string OCamlCodeGen::PE() { return make_access("pe", peExpr, false); }
+string OCamlCodeGen::vEOF() { return make_access("eof", eofExpr, false); }
+string OCamlCodeGen::vCS() { return make_access("cs", csExpr); }
+string OCamlCodeGen::TOP() { return make_access("top", topExpr); }
+string OCamlCodeGen::STACK() { return make_access("stack", stackExpr); }
+string OCamlCodeGen::ACT() { return make_access("act", actExpr); }
+string OCamlCodeGen::TOKSTART() { return make_access("ts", tokstartExpr); }
+string OCamlCodeGen::TOKEND() { return make_access("te", tokendExpr); }
+
+string OCamlCodeGen::GET_WIDE_KEY()
+{
+	if ( redFsm->anyConditions() ) 
+		return "_widec";
+	else
+    { ostringstream ret; ret << "Char.code " << GET_KEY(); return ret.str(); }
+}
+
+string OCamlCodeGen::GET_WIDE_KEY( RedStateAp *state )
+{
+	if ( state->stateCondList.length() > 0 )
+		return "_widec";
+	else
+    { ostringstream ret; ret << "Char.code " << GET_KEY(); return ret.str(); }
+}
+
+/* Write out level number of tabs. Makes the nested binary search nice
+ * looking. */
+string OCamlCodeGen::TABS( int level )
+{
+	string result;
+	while ( level-- > 0 )
+		result += "\t";
+	return result;
+}
+
+/* Write out a key from the fsm code gen. Depends on wether or not the key is
+ * signed. */
+string OCamlCodeGen::KEY( Key key )
+{
+	ostringstream ret;
+	if ( keyOps->isSigned || !hostLang->explicitUnsigned )
+		ret << key.getVal();
+	else
+		ret << (unsigned long) key.getVal() << 'u';
+	return ret.str();
+}
+
+string OCamlCodeGen::ALPHA_KEY( Key key )
+{
+	ostringstream ret;
+  ret << key.getVal();
+  /*
+	if (key.getVal() > 0xFFFF) {
+		ret << key.getVal();
+	} else {
+		ret << "'\\u" << std::hex << std::setw(4) << std::setfill('0') << 
+			key.getVal() << "'";
+	}
+  */
+	//ret << "(char) " << key.getVal();
+	return ret.str();
+}
+
+void OCamlCodeGen::EXEC( ostream &ret, GenInlineItem *item, int targState, int inFinish )
+{
+// The parser gives fexec two children.
+	ret << "begin " << P() << " <- ";
+	INLINE_LIST( ret, item->children, targState, inFinish );
+	ret << " - 1 end; ";
+}
+
+void OCamlCodeGen::LM_SWITCH( ostream &ret, GenInlineItem *item, 
+		int targState, int inFinish )
+{
+	bool catch_all = false;
+	ret << 
+		"	begin match " << ACT() << " with\n";
+
+	for ( GenInlineList::Iter lma = *item->children; lma.lte(); lma++ ) {
+		/* Write the case label, the action and the case break. */
+		if ( lma->lmId < 0 )
+		{
+			catch_all = true;
+			ret << "	| _ ->\n";
+		}
+		else
+			ret << "	| " << lma->lmId << " ->\n";
+
+		/* Write the block and close it off. */
+		ret << "	begin ";
+		INLINE_LIST( ret, lma->children, targState, inFinish );
+		ret << " end\n";
+	}
+
+	if (!catch_all)
+		ret << "  | _ -> assert false\n";
+
+	ret << 
+		"	end;\n"
+		"\t";
+}
+
+void OCamlCodeGen::SET_ACT( ostream &ret, GenInlineItem *item )
+{
+	ret << ACT() << " <- " << item->lmId << "; ";
+}
+
+void OCamlCodeGen::SET_TOKEND( ostream &ret, GenInlineItem *item )
+{
+	/* The tokend action sets tokend. */
+	ret << TOKEND() << " <- " << P();
+	if ( item->offset != 0 ) 
+		out << "+" << item->offset;
+	out << "; ";
+}
+
+void OCamlCodeGen::GET_TOKEND( ostream &ret, GenInlineItem *item )
+{
+	ret << TOKEND();
+}
+
+void OCamlCodeGen::INIT_TOKSTART( ostream &ret, GenInlineItem *item )
+{
+	ret << TOKSTART() << " <- " << NULL_ITEM() << "; ";
+}
+
+void OCamlCodeGen::INIT_ACT( ostream &ret, GenInlineItem *item )
+{
+	ret << ACT() << " <- 0;";
+}
+
+void OCamlCodeGen::SET_TOKSTART( ostream &ret, GenInlineItem *item )
+{
+	ret << TOKSTART() << " <- " << P() << "; ";
+}
+
+void OCamlCodeGen::SUB_ACTION( ostream &ret, GenInlineItem *item, 
+		int targState, bool inFinish )
+{
+	if ( item->children->length() > 0 ) {
+		/* Write the block and close it off. */
+		ret << "begin ";
+		INLINE_LIST( ret, item->children, targState, inFinish );
+		ret << " end";
+	}
+}
+
+
+/* Write out an inline tree structure. Walks the list and possibly calls out
+ * to virtual functions than handle language specific items in the tree. */
+void OCamlCodeGen::INLINE_LIST( ostream &ret, GenInlineList *inlineList, 
+		int targState, bool inFinish )
+{
+	for ( GenInlineList::Iter item = *inlineList; item.lte(); item++ ) {
+		switch ( item->type ) {
+		case GenInlineItem::Text:
+			ret << item->data;
+			break;
+		case GenInlineItem::Goto:
+			GOTO( ret, item->targState->id, inFinish );
+			break;
+		case GenInlineItem::Call:
+			CALL( ret, item->targState->id, targState, inFinish );
+			break;
+		case GenInlineItem::Next:
+			NEXT( ret, item->targState->id, inFinish );
+			break;
+		case GenInlineItem::Ret:
+			RET( ret, inFinish );
+			break;
+		case GenInlineItem::PChar:
+			ret << P();
+			break;
+		case GenInlineItem::Char:
+			ret << GET_KEY();
+			break;
+		case GenInlineItem::Hold:
+			ret << P() << " <- " << P() << " - 1; ";
+			break;
+		case GenInlineItem::Exec:
+			EXEC( ret, item, targState, inFinish );
+			break;
+		case GenInlineItem::Curs:
+			CURS( ret, inFinish );
+			break;
+		case GenInlineItem::Targs:
+			TARGS( ret, inFinish, targState );
+			break;
+		case GenInlineItem::Entry:
+			ret << item->targState->id;
+			break;
+		case GenInlineItem::GotoExpr:
+			GOTO_EXPR( ret, item, inFinish );
+			break;
+		case GenInlineItem::CallExpr:
+			CALL_EXPR( ret, item, targState, inFinish );
+			break;
+		case GenInlineItem::NextExpr:
+			NEXT_EXPR( ret, item, inFinish );
+			break;
+		case GenInlineItem::LmSwitch:
+			LM_SWITCH( ret, item, targState, inFinish );
+			break;
+		case GenInlineItem::LmSetActId:
+			SET_ACT( ret, item );
+			break;
+		case GenInlineItem::LmSetTokEnd:
+			SET_TOKEND( ret, item );
+			break;
+		case GenInlineItem::LmGetTokEnd:
+			GET_TOKEND( ret, item );
+			break;
+		case GenInlineItem::LmInitTokStart:
+			INIT_TOKSTART( ret, item );
+			break;
+		case GenInlineItem::LmInitAct:
+			INIT_ACT( ret, item );
+			break;
+		case GenInlineItem::LmSetTokStart:
+			SET_TOKSTART( ret, item );
+			break;
+		case GenInlineItem::SubAction:
+			SUB_ACTION( ret, item, targState, inFinish );
+			break;
+		case GenInlineItem::Break:
+			BREAK( ret, targState );
+			break;
+		}
+	}
+}
+/* Write out paths in line directives. Escapes any special characters. */
+string OCamlCodeGen::LDIR_PATH( char *path )
+{
+	ostringstream ret;
+	for ( char *pc = path; *pc != 0; pc++ ) {
+		if ( *pc == '\\' )
+			ret << "\\\\";
+		else
+			ret << *pc;
+	}
+	return ret.str();
+}
+
+void OCamlCodeGen::ACTION( ostream &ret, GenAction *action, int targState, bool inFinish )
+{
+	/* Write the preprocessor line info for going into the source file. */
+	ocamlLineDirective( ret, action->loc.fileName, action->loc.line );
+
+	/* Write the block and close it off. */
+	ret << "\t\tbegin ";
+	INLINE_LIST( ret, action->inlineList, targState, inFinish );
+	ret << " end;\n";
+}
+
+void OCamlCodeGen::CONDITION( ostream &ret, GenAction *condition )
+{
+	ret << "\n";
+	ocamlLineDirective( ret, condition->loc.fileName, condition->loc.line );
+	INLINE_LIST( ret, condition->inlineList, 0, false );
+}
+
+string OCamlCodeGen::ERROR_STATE()
+{
+	ostringstream ret;
+	if ( redFsm->errState != 0 )
+		ret << redFsm->errState->id;
+	else
+		ret << "-1";
+	return ret.str();
+}
+
+string OCamlCodeGen::FIRST_FINAL_STATE()
+{
+	ostringstream ret;
+	if ( redFsm->firstFinState != 0 )
+		ret << redFsm->firstFinState->id;
+	else
+		ret << redFsm->nextStateId;
+	return ret.str();
+}
+
+void OCamlCodeGen::writeInit()
+{
+	out << "	begin\n";
+
+	if ( !noCS )
+		out << "\t" << vCS() << " <- " << START() << ";\n";
+	
+	/* If there are any calls, then the stack top needs initialization. */
+	if ( redFsm->anyActionCalls() || redFsm->anyActionRets() )
+		out << "\t" << TOP() << " <- 0;\n";
+
+	if ( hasLongestMatch ) {
+		out << 
+			"	" << TOKSTART() << " <- " << NULL_ITEM() << ";\n"
+			"	" << TOKEND() << " <- " << NULL_ITEM() << ";\n"
+			"	" << ACT() << " <- 0;\n";
+	}
+	out << "	end;\n";
+}
+
+string OCamlCodeGen::PRE_INCR(string val)
+{
+  ostringstream ret;
+  ret << "(" << val << " <- " << val << " + 1; " << val << ")";
+  return ret.str();
+}
+
+string OCamlCodeGen::POST_INCR(string val)
+{
+  ostringstream ret;
+  ret << "(let temp = " << val << " in " << val << " <- " << val << " + 1; temp)";
+  return ret.str();
+}
+
+string OCamlCodeGen::PRE_DECR(string val)
+{
+  ostringstream ret;
+  ret << "(" << val << " <- " << val << " - 1; " << val << ")";
+  return ret.str();
+}
+
+string OCamlCodeGen::POST_DECR(string val)
+{
+  ostringstream ret;
+  ret << "(let temp = " << val << " in " << val << " <- " << val << " - 1; temp)";
+  return ret.str();
+}
+
+string OCamlCodeGen::DATA_PREFIX()
+{
+  if ( data_prefix.empty() ) // init
+  {
+    data_prefix = string(fsmName) + "_";
+    if (data_prefix.size() > 0)
+      data_prefix[0] = ::tolower(data_prefix[0]); // uncapitalize
+  }
+	if ( !noPrefix )
+		return data_prefix;
+	return "";
+}
+
+/* Emit the alphabet data type. */
+string OCamlCodeGen::ALPH_TYPE()
+{
+	string ret = keyOps->alphType->data1;
+	if ( keyOps->alphType->data2 != 0 ) {
+		ret += " ";
+		ret += + keyOps->alphType->data2;
+	}
+	return ret;
+}
+
+/* Emit the alphabet data type. */
+string OCamlCodeGen::WIDE_ALPH_TYPE()
+{
+	string ret;
+	if ( redFsm->maxKey <= keyOps->maxKey )
+		ret = ALPH_TYPE();
+	else {
+		long long maxKeyVal = redFsm->maxKey.getLongLong();
+		HostType *wideType = keyOps->typeSubsumes( keyOps->isSigned, maxKeyVal );
+		assert( wideType != 0 );
+
+		ret = wideType->data1;
+		if ( wideType->data2 != 0 ) {
+			ret += " ";
+			ret += wideType->data2;
+		}
+	}
+	return ret;
+}
+
+void OCamlCodeGen::STATE_IDS()
+{
+	if ( redFsm->startState != 0 )
+		STATIC_VAR( "int", START() ) << " = " << START_STATE_ID() << TOP_SEP ();
+
+	if ( !noFinal )
+		STATIC_VAR( "int" , FIRST_FINAL() ) << " = " << FIRST_FINAL_STATE() << TOP_SEP();
+
+	if ( !noError )
+		STATIC_VAR( "int", ERROR() ) << " = " << ERROR_STATE() << TOP_SEP();
+
+	out << "\n";
+
+	if ( entryPointNames.length() > 0 ) {
+		for ( EntryNameVect::Iter en = entryPointNames; en.lte(); en++ ) {
+			STATIC_VAR( "int", DATA_PREFIX() + "en_" + *en ) << 
+					" = " << entryPointIds[en.pos()] << TOP_SEP();
+		}
+		out << "\n";
+	}
+}
+
+
+void OCamlCodeGen::writeStart()
+{
+	out << START_STATE_ID();
+}
+
+void OCamlCodeGen::writeFirstFinal()
+{
+	out << FIRST_FINAL_STATE();
+}
+
+void OCamlCodeGen::writeError()
+{
+	out << ERROR_STATE();
+}
+
+string OCamlCodeGen::GET_KEY()
+{
+	ostringstream ret;
+	if ( getKeyExpr != 0 ) { 
+		/* Emit the user supplied method of retrieving the key. */
+		ret << "(";
+		INLINE_LIST( ret, getKeyExpr, 0, false );
+		ret << ")";
+	}
+	else {
+		/* Expression for retrieving the key, use simple dereference. */
+		ret << "data.[" << P() << "]";
+	}
+	return ret.str();
+}
+string OCamlCodeGen::NULL_ITEM()
+{
+	return "-1";
+}
+
+string OCamlCodeGen::POINTER()
+{
+	// XXX C# has no pointers
+	// multiple items seperated by commas can also be pointer types.
+	return " ";
+}
+
+string OCamlCodeGen::PTR_CONST()
+{
+	return "";
+}
+
+std::ostream &OCamlCodeGen::OPEN_ARRAY( string type, string name )
+{
+	out << "let " << name << " : " << type << " array = [|" << endl;
+	return out;
+}
+
+std::ostream &OCamlCodeGen::CLOSE_ARRAY()
+{
+	return out << "|]" << TOP_SEP();
+}
+
+string OCamlCodeGen::TOP_SEP()
+{
+  return "\n"; // original syntax
+}
+
+string OCamlCodeGen::ARR_SEP()
+{
+  return "; ";
+}
+
+string OCamlCodeGen::AT(const string& array, const string& index)
+{
+  ostringstream ret;
+  ret << array << ".(" << index << ")";
+  return ret.str();
+}
+
+std::ostream &OCamlCodeGen::STATIC_VAR( string type, string name )
+{
+	out << "let " << name << " : " << type;
+	return out;
+}
+
+string OCamlCodeGen::ARR_OFF( string ptr, string offset )
+{
+	// XXX C# can't do pointer arithmetic
+	return "&" + ptr + "[" + offset + "]";
+}
+
+string OCamlCodeGen::CAST( string type )
+{
+  return "";
+//	return "(" + type + ")";
+}
+
+string OCamlCodeGen::UINT( )
+{
+	return "uint";
+}
+
+std::ostream &OCamlCodeGen::SWITCH_DEFAULT()
+{
+	out << "		| _ -> ()\n";
+	return out;
+}
+
+string OCamlCodeGen::CTRL_FLOW()
+{
+	return "if true then ";
+}
+
+void OCamlCodeGen::finishRagelDef()
+{
+	if ( codeStyle == GenGoto || codeStyle == GenFGoto || 
+			codeStyle == GenIpGoto || codeStyle == GenSplit )
+	{
+		/* For directly executable machines there is no required state
+		 * ordering. Choose a depth-first ordering to increase the
+		 * potential for fall-throughs. */
+		redFsm->depthFirstOrdering();
+	}
+	else {
+		/* The frontend will do this for us, but it may be a good idea to
+		 * force it if the intermediate file is edited. */
+		redFsm->sortByStateId();
+	}
+
+	/* Choose default transitions and the single transition. */
+	redFsm->chooseDefaultSpan();
+		
+	/* Maybe do flat expand, otherwise choose single. */
+	if ( codeStyle == GenFlat || codeStyle == GenFFlat )
+		redFsm->makeFlat();
+	else
+		redFsm->chooseSingle();
+
+	/* If any errors have occured in the input file then don't write anything. */
+	if ( gblErrorCount > 0 )
+		return;
+	
+	if ( codeStyle == GenSplit )
+		redFsm->partitionFsm( numSplitPartitions );
+
+	if ( codeStyle == GenIpGoto || codeStyle == GenSplit )
+		redFsm->setInTrans();
+
+	/* Anlayze Machine will find the final action reference counts, among
+	 * other things. We will use these in reporting the usage
+	 * of fsm directives in action code. */
+	analyzeMachine();
+
+	/* Determine if we should use indicies. */
+	calcIndexSize();
+}
+
+ostream &OCamlCodeGen::source_warning( const InputLoc &loc )
+{
+	cerr << sourceFileName << ":" << loc.line << ":" << loc.col << ": warning: ";
+	return cerr;
+}
+
+ostream &OCamlCodeGen::source_error( const InputLoc &loc )
+{
+	gblErrorCount += 1;
+	assert( sourceFileName != 0 );
+	cerr << sourceFileName << ":" << loc.line << ":" << loc.col << ": ";
+	return cerr;
+}
+