1 files changed, 67 insertions, 0 deletions
diff --git a/CryptoPP/fltrimpl.h b/CryptoPP/fltrimpl.h
new file mode 100644
index 000000000..4087d7d9f
--- /dev/null
+++ b/CryptoPP/fltrimpl.h
@@ -0,0 +1,67 @@
+#ifndef CRYPTOPP_FLTRIMPL_H
+#define CRYPTOPP_FLTRIMPL_H
+
+#define FILTER_BEGIN	\
+	switch (m_continueAt)	\
+	{	\
+	case 0:	\
+		m_inputPosition = 0;
+
+#define FILTER_END_NO_MESSAGE_END_NO_RETURN	\
+		break;	\
+	default:	\
+		assert(false);	\
+	}
+
+#define FILTER_END_NO_MESSAGE_END	\
+	FILTER_END_NO_MESSAGE_END_NO_RETURN	\
+	return 0;
+
+/*
+#define FILTER_END	\
+	case -1:	\
+		if (messageEnd && Output(-1, NULL, 0, messageEnd, blocking))	\
+			return 1;	\
+	FILTER_END_NO_MESSAGE_END
+*/
+
+#define FILTER_OUTPUT3(site, statement, output, length, messageEnd, channel)	\
+	{\
+	case site:	\
+	statement;	\
+	if (Output(site, output, length, messageEnd, blocking, channel))	\
+		return STDMAX(size_t(1), length-m_inputPosition);\
+	}
+
+#define FILTER_OUTPUT2(site, statement, output, length, messageEnd)	\
+	FILTER_OUTPUT3(site, statement, output, length, messageEnd, DEFAULT_CHANNEL)
+
+#define FILTER_OUTPUT(site, output, length, messageEnd)	\
+	FILTER_OUTPUT2(site, 0, output, length, messageEnd)
+
+#define FILTER_OUTPUT_BYTE(site, output)	\
+	FILTER_OUTPUT(site, &(const byte &)(byte)output, 1, 0)
+
+#define FILTER_OUTPUT2_MODIFIABLE(site, statement, output, length, messageEnd)	\
+	{\
+	case site:	\
+	statement;	\
+	if (OutputModifiable(site, output, length, messageEnd, blocking))	\
+		return STDMAX(size_t(1), length-m_inputPosition);\
+	}
+
+#define FILTER_OUTPUT_MODIFIABLE(site, output, length, messageEnd)	\
+	FILTER_OUTPUT2_MODIFIABLE(site, 0, output, length, messageEnd)
+
+#define FILTER_OUTPUT2_MAYBE_MODIFIABLE(site, statement, output, length, messageEnd, modifiable)	\
+	{\
+	case site:	\
+	statement;	\
+	if (modifiable ? OutputModifiable(site, output, length, messageEnd, blocking) : Output(site, output, length, messageEnd, blocking))	\
+		return STDMAX(size_t(1), length-m_inputPosition);\
+	}
+
+#define FILTER_OUTPUT_MAYBE_MODIFIABLE(site, output, length, messageEnd, modifiable)	\
+	FILTER_OUTPUT2_MAYBE_MODIFIABLE(site, 0, output, length, messageEnd, modifiable)
+
+#endif