From a8b3d08c3ad761b65bef0cf78fdcfbd6d3570f90 Mon Sep 17 00:00:00 2001
From: Jason Volk <jason@zemos.net>
Date: Tue, 17 Oct 2017 00:50:07 -0700
Subject: [PATCH] ircd::buffer: Add null()/empty() participation.

---
 include/ircd/buffer.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/include/ircd/buffer.h b/include/ircd/buffer.h
index 467dc0d5b..796496667 100644
--- a/include/ircd/buffer.h
+++ b/include/ircd/buffer.h
@@ -81,6 +81,9 @@ namespace ircd::buffer
 	template<class it> it rend(const buffer<it> &buffer);
 
 	// Single buffer tools
+	template<class it> bool null(const buffer<it> &buffer);
+	template<class it> bool empty(const buffer<it> &buffer);
+	template<class it> bool operator!(const buffer<it> &buffer);
 	template<class it> size_t size(const buffer<it> &buffer);
 	template<class it> const it &data(const buffer<it> &buffer);
 	template<class it> size_t consume(buffer<it> &buffer, const size_t &bytes);
@@ -569,6 +572,27 @@ ircd::buffer::size(const buffer<it> &buffer)
 	return std::distance(get<0>(buffer), get<1>(buffer));
 }
 
+template<class it>
+bool
+ircd::buffer::operator!(const buffer<it> &buffer)
+{
+	return empty(buffer);
+}
+
+template<class it>
+bool
+ircd::buffer::empty(const buffer<it> &buffer)
+{
+	return null(buffer) || !std::distance(get<0>(buffer), get<1>(buffer));
+}
+
+template<class it>
+bool
+ircd::buffer::null(const buffer<it> &buffer)
+{
+	return get<0>(buffer) == nullptr;
+}
+
 template<class it>
 it
 ircd::buffer::rend(const buffer<it> &buffer)