From f461b3c1839e5cfc85685ed1cb828ecaa74d6912 Mon Sep 17 00:00:00 2001
From: Mike Buland <eichlan@xagasoft.com>
Date: Mon, 29 Dec 2008 21:33:08 +0000
Subject: Fixed some horror inside the Taf writer.  It had a strange corner
 case when adding a property to a group that had a name but an empty value.

Also added a isEmpty() function to Bu::FString, finally.
---
 src/fstring.h     | 15 +++++++++++++++
 src/tafwriter.cpp |  4 +---
 src/unit/taf.cpp  | 19 +++++++++++++++++--
 3 files changed, 33 insertions(+), 5 deletions(-)

diff --git a/src/fstring.h b/src/fstring.h
index 5c70919..e1660f9 100644
--- a/src/fstring.h
+++ b/src/fstring.h
@@ -928,26 +928,41 @@ namespace Bu
 
 		iterator begin()
 		{
+			if( nLength == 0 )
+				return NULL;
 			flatten();
 			return pFirst->pData;
 		}
 
 		const_iterator begin() const
 		{
+			if( nLength == 0 )
+				return NULL;
 			flatten();
 			return pFirst->pData;
 		}
 
 		iterator end()
 		{
+			if( nLength == 0 )
+				return NULL;
 			return pFirst->pData+pFirst->nLength;
 		}
 
 		const_iterator end() const
 		{
+			if( nLength == 0 )
+				return NULL;
 			return pFirst->pData+pFirst->nLength;
 		}
 
+		bool isEmpty() const
+		{
+			if( nLength == 0 )
+				return true;
+			return false;
+		}
+
 	private:
 		void flatten() const
 		{
diff --git a/src/tafwriter.cpp b/src/tafwriter.cpp
index 8e5fcdc..b0f5def 100644
--- a/src/tafwriter.cpp
+++ b/src/tafwriter.cpp
@@ -58,7 +58,7 @@ void Bu::TafWriter::writeGroup( const Bu::TafGroup *pRoot )
 void Bu::TafWriter::writeProperty( const Bu::TafProperty *pProp )
 {
 	ident();
-	if( pProp->getName().getStr() != NULL && pProp->getName() != "" )
+	if( !pProp->getName().isEmpty() )
 	{
 		writeString( pProp->getName() );
 		sOut.write("=", 1 );
@@ -90,8 +90,6 @@ void Bu::TafWriter::writeComment( const Bu::TafComment *pComment )
 
 void Bu::TafWriter::writeString( const Bu::FString &str )
 {
-	if( str.getStr() == NULL )
-		return;
 	sOut.write("\"", 1 );
 	for( Bu::FString::const_iterator s = str.begin(); s != str.end(); s++ )
 	{
diff --git a/src/unit/taf.cpp b/src/unit/taf.cpp
index 0813444..3bf7cc6 100644
--- a/src/unit/taf.cpp
+++ b/src/unit/taf.cpp
@@ -21,7 +21,8 @@ public:
 	{
 		setName("taf");
 		addTest( Unit::read1 );
-		addTest( Unit::encode );
+		addTest( Unit::encode1 );
+		addTest( Unit::emptyStr1 );
 	}
 
 	virtual ~Unit()
@@ -50,7 +51,7 @@ public:
 #undef FN_TMP
 	}
 
-	void encode()
+	void encode1()
 	{
 		Bu::MemBuf mb;
 		Bu::TafWriter tw( mb );
@@ -93,6 +94,20 @@ public:
 		unitTest( rg->getProperty("Encoded") == sData );
 		delete rg;
 	}
+
+	void emptyStr1()
+	{
+		Bu::MemBuf mb;
+		Bu::TafWriter tw( mb );
+
+		Bu::TafGroup g("Test Group");
+		Bu::FString sVal;
+		g.addChild( new Bu::TafProperty("Lame", sVal) );
+		tw.writeGroup( &g );
+
+		unitTest(
+			mb.getString() == "{\"Test Group\":\n    \"Lame\"=\"\"\n}\n" );
+	}
 };
 
 int main( int argc, char *argv[] )
-- 
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