From dd91e04ca96ff2266ba3de7ead0d73ff40a760f4 Mon Sep 17 00:00:00 2001
From: helly <helly@642ea486-5414-0410-9d7f-a0204ed87703>
Date: Sun, 16 Apr 2006 16:59:33 +0000
Subject: [PATCH] - Only emit YYMARKER if needed

---
 code.cc   | 19 +++++++++++++++----
 globals.h |  1 +
 main.cc   |  1 +
 3 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/code.cc b/code.cc
index ec826ac8..f75830e3 100644
--- a/code.cc
+++ b/code.cc
@@ -396,11 +396,11 @@ void Initial::emit(std::ostream &o, uint ind, bool &readCh) const
 	}
 	if (state->link)
 	{
-		need(o, ind, state->depth, readCh, setMarker);
+		need(o, ind, state->depth, readCh, setMarker && bUseYYMarker);
 	}
 	else
 	{
-		if (setMarker)
+		if (setMarker && bUseYYMarker)
 		{
 			o << indent(ind) << "YYMARKER = YYCURSOR;\n";
 		}
@@ -417,12 +417,22 @@ void Save::emit(std::ostream &o, uint ind, bool &readCh) const
 
 	if (state->link)
 	{
-		o << indent(ind) << "YYMARKER = ++YYCURSOR;\n";
+		if (bUseYYMarker)
+		{
+			o << indent(ind) << "YYMARKER = ++YYCURSOR;\n";
+		}
 		need(o, ind, state->depth, readCh, false);
 	}
 	else
 	{
-		o << indent(ind) << "yych = *(YYMARKER = ++YYCURSOR);\n";
+		if (bUseYYMarker)
+		{
+			o << indent(ind) << "yych = *(YYMARKER = ++YYCURSOR);\n";
+		}
+		else
+		{
+			o << indent(ind) << "yych = *++YYCURSOR;\n";
+		}
 		readCh = false;
 	}
 }
@@ -464,6 +474,7 @@ void Accept::emit(std::ostream &o, uint ind, bool &readCh) const
 			if (first)
 			{
 				first = false;
+				bUseYYMarker = true;
 				o << indent(ind) << "YYCURSOR = YYMARKER;\n";
 				if (bUsedYYAccept && cases > 1)
 				{
diff --git a/globals.h b/globals.h
index 7ca83829..323d1c70 100644
--- a/globals.h
+++ b/globals.h
@@ -36,6 +36,7 @@ extern bool bUseStateAbort;
 extern bool bUseStateNext;
 extern bool bWroteGetState;
 extern bool bUseYYFill;
+extern bool bUseYYMarker;
 
 extern uint asc2ebc[256];
 extern uint ebc2asc[256];
diff --git a/main.cc b/main.cc
index 7a2c5a18..ddbe917d 100644
--- a/main.cc
+++ b/main.cc
@@ -33,6 +33,7 @@ bool bUsedYYAccept = false;
 bool bUseStartLabel= false;
 bool bUseStateNext = false;
 bool bUseYYFill    = true;
+bool bUseYYMarker  = false;
 
 std::string startLabelName;
 uint maxFill = 1;
-- 
2.50.1