From 0353e4c19643665bc368912ffaae2457eabea004 Mon Sep 17 00:00:00 2001
From: fangyidong <fangyidong@b68fe964-5755-0410-a06c-9fee2ea08261>
Date: Wed, 16 May 2012 13:51:15 +0000
Subject: [PATCH] Issue #12: Excessive memory consumption in parse()
 (contributed by glen.tw)

---
 doc/json.lex                                    | 4 ++--
 src/main/java/org/json/simple/parser/Yylex.java | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/doc/json.lex b/doc/json.lex
index e22dd34..cdb2753 100644
--- a/doc/json.lex
+++ b/doc/json.lex
@@ -46,7 +46,7 @@ FALLBACK_CH = .
 												}
 <STRING_BEGIN> \\				{sb.append('\\');}
 												
-<YYINITIAL> \" 					{ sb.delete(0, sb.length());yybegin(STRING_BEGIN);}
+<YYINITIAL> \" 					{ sb = null; sb = new StringBuffer(); yybegin(STRING_BEGIN);}
 <YYINITIAL> {INT}				{ Long val=Long.valueOf(yytext()); return new Yytoken(Yytoken.TYPE_VALUE, val);}
 <YYINITIAL> {DOUBLE}			{ Double val=Double.valueOf(yytext()); return new Yytoken(Yytoken.TYPE_VALUE, val);}
 <YYINITIAL> "true"|"false"		{ Boolean val=Boolean.valueOf(yytext()); return new Yytoken(Yytoken.TYPE_VALUE, val);}
@@ -58,4 +58,4 @@ FALLBACK_CH = .
 <YYINITIAL> ","					{ return new Yytoken(Yytoken.TYPE_COMMA,null);}
 <YYINITIAL> ":"					{ return new Yytoken(Yytoken.TYPE_COLON,null);}
 <YYINITIAL> {WS}+		    	{}
-<YYINITIAL> {FALLBACK_CH}		{ throw new ParseException(yychar, ParseException.ERROR_UNEXPECTED_CHAR, new Character(yycharat(0)));}
\ No newline at end of file
+<YYINITIAL> {FALLBACK_CH}		{ throw new ParseException(yychar, ParseException.ERROR_UNEXPECTED_CHAR, new Character(yycharat(0)));}
diff --git a/src/main/java/org/json/simple/parser/Yylex.java b/src/main/java/org/json/simple/parser/Yylex.java
index 42ce508..e58e27e 100644
--- a/src/main/java/org/json/simple/parser/Yylex.java
+++ b/src/main/java/org/json/simple/parser/Yylex.java
@@ -575,7 +575,7 @@ int getPosition(){
           }
         case 25: break;
         case 4: 
-          { sb.delete(0, sb.length());yybegin(STRING_BEGIN);
+          { sb = null; sb = new StringBuffer(); yybegin(STRING_BEGIN);
           }
         case 26: break;
         case 16: