diff --git a/libs/util/include/psemek/util/span.hpp b/libs/util/include/psemek/util/span.hpp
index 93cf5af3..b710180e 100644
--- a/libs/util/include/psemek/util/span.hpp
+++ b/libs/util/include/psemek/util/span.hpp
@@ -35,6 +35,11 @@ namespace psemek::util
 			, p_end{end}
 		{}
 
+		span(T * begin, std::size_t size)
+			: p_begin{begin}
+			, p_end{begin + size}
+		{}
+
 		template <std::size_t N>
 		span(T (&a)[N])
 			: p_begin{a}
@@ -64,7 +69,7 @@ namespace psemek::util
 		T * begin() const { return p_begin; }
 		T * end() const { return p_end; }
 
-		difference_type size() const { return p_end - p_begin; }
+		size_type size() const { return p_end - p_begin; }
 
 		bool empty() const { return p_begin == p_end; }
 
@@ -74,6 +79,27 @@ namespace psemek::util
 		T & front() const { return *p_begin; }
 		T & back() const { return *(p_end - 1); }
 
+		span subspan(std::size_t start, std::size_t end) const
+		{
+			return span{p_begin + start, p_begin + end};
+		}
+
+		span prefix(std::size_t size) const
+		{
+			return subspan(0, size);
+		}
+
+		span suffix(std::size_t size) const
+		{
+			return span{p_end - size, p_end};
+		}
+
+		span & consume(std::size_t count)
+		{
+			p_begin += count;
+			return *this;
+		}
+
 		void reset()
 		{
 			p_begin = nullptr;