From 1743bd0eacec94c6f6e3c89e16d0bd6d301017e8 Mon Sep 17 00:00:00 2001
From: Mike Buland <eichlan@xagasoft.com>
Date: Mon, 29 Dec 2008 21:46:03 +0000
Subject: Corrected the premature end of stream read corner case in Taf...it
 was freaking out and allocating all memory, now it just throws an exception.

---
 src/tafreader.cpp | 23 ++++++++++++++++++++---
 src/tafreader.h   |  1 +
 src/unit/taf.cpp  | 16 ++++++++++++++++
 3 files changed, 37 insertions(+), 3 deletions(-)

diff --git a/src/tafreader.cpp b/src/tafreader.cpp
index 7bb0933..4408cce 100644
--- a/src/tafreader.cpp
+++ b/src/tafreader.cpp
@@ -209,15 +209,32 @@ void Bu::TafReader::next()
 		iCol++;
 	if( c == '}' )
 	{
-		sIn.read( &c, 1 );
+		rawread( &c );
 		if( c != '}' )
-			sIn.read( &la, 1 );
+			rawread( &la );
 	}
 	else
 	{
 		c = la;
 		if( c != '}' )
-			sIn.read( &la, 1 );
+			rawread( &la );
+	}
+}
+
+void Bu::TafReader::rawread( char *c )
+{
+	if( sIn.read( c, 1 ) < 1 )
+	{
+		if( sIn.isEOS() )
+		{
+			throw TafException("%d:%d: Premature end of stream.",
+				iLine, iCol, c );
+		}
+		else
+		{
+			throw TafException("%d:%d: No data read, but not end of stream?",
+				iLine, iCol, c );
+		}
 	}
 }
 
diff --git a/src/tafreader.h b/src/tafreader.h
index ce67a5f..53ab6d4 100644
--- a/src/tafreader.h
+++ b/src/tafreader.h
@@ -35,6 +35,7 @@ namespace Bu
 		bool isws();
 		void next();
 		Bu::FString readStr();
+		void rawread( char *c );
 		char c, la;
 		Bu::Stream &sIn;
 		int iLine, iCol;
diff --git a/src/unit/taf.cpp b/src/unit/taf.cpp
index 3bf7cc6..e4b3ccc 100644
--- a/src/unit/taf.cpp
+++ b/src/unit/taf.cpp
@@ -23,6 +23,7 @@ public:
 		addTest( Unit::read1 );
 		addTest( Unit::encode1 );
 		addTest( Unit::emptyStr1 );
+		addTest( Unit::incomplete1 );
 	}
 
 	virtual ~Unit()
@@ -108,6 +109,21 @@ public:
 		unitTest(
 			mb.getString() == "{\"Test Group\":\n    \"Lame\"=\"\"\n}\n" );
 	}
+
+	void incomplete1()
+	{
+		try
+		{
+			Bu::MemBuf mb("{Lame: \"Hello=\"");
+			Bu::TafReader tr( mb );
+			delete tr.readGroup();
+			unitFailed("Should have thrown an exception, didn't.");
+		}
+		catch( Bu::TafException &e )
+		{
+			// Woot
+		}
+	}
 };
 
 int main( int argc, char *argv[] )
-- 
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