error handling cleanup

stepmania/src/CryptHelpers.cpp

@@ -134,9 +134,9 @@ bool RageFileSink::IsolatedFlush(bool hardFlush, bool blocking)
 	if (!m_file.IsOpen())
 		throw Err("FileSink: output stream not opened");
 	
-	m_file.Flush();
-	if( !m_file.IsGood() )
-		throw WriteErr();
+	
+	if( m_file.Flush() == -1 )
+		throw WriteErr( m_file );
 	
 	return false;
 }
@@ -146,13 +146,12 @@ unsigned int RageFileSink::Put2(const byte *inString, unsigned int length, int m
 	if (!m_file.IsOpen())
 		throw Err("FileSink: output stream not opened");
 	
-	m_file.Write((const char *)inString, length);
+	if( m_file.Write((const char *)inString, length) == -1 )
+		throw WriteErr( m_file );
 	
 	if (messageEnd)
-		m_file.Flush();
-	
-	if( !m_file.IsGood() )
-		throw WriteErr();
+		if( m_file.Flush() == -1 )
+			throw WriteErr( m_file );
 	
 	return 0;
 }

stepmania/src/CryptHelpers.h

@@ -66,7 +66,7 @@ public:
 		Err(const std::string &s) : Exception(IO_ERROR, s) {}
 	};
 	class OpenErr : public Err {public: OpenErr(const std::string &filename) : Err("FileSink: error opening file for writing: " + filename) {}};
-	class WriteErr : public Err {public: WriteErr() : Err("FileSink: error writing file") {}};
+	struct WriteErr : public Err { WriteErr(const RageFile &f) : Err("RageFileSink(" + f.GetPath() + "): write error: " + f.GetError()) {}};
 
 	RageFileSink() {}
 	RageFileSink(const char *filename, bool binary=true)