diff --git a/include/bx/inline/string.inl b/include/bx/inline/string.inl
index 12273bc..0683f37 100644
--- a/include/bx/inline/string.inl
+++ b/include/bx/inline/string.inl
@@ -58,9 +58,9 @@ namespace bx
 		clear();
 	}
 
-	inline StringView::StringView(const StringView& _rhs)
+	inline StringView::StringView(const StringView& _rhs, int32_t _start, int32_t _len)
 	{
-		set(_rhs.m_ptr, _rhs.m_len);
+		set(_rhs, _start, _len);
 	}
 
 	inline StringView& StringView::operator=(const char* _rhs)
@@ -71,7 +71,7 @@ namespace bx
 
 	inline StringView& StringView::operator=(const StringView& _rhs)
 	{
-		set(_rhs.m_ptr, _rhs.m_len);
+		set(_rhs);
 		return *this;
 	}
 
@@ -135,12 +135,14 @@ namespace bx
 	template<typename Ty>
 	inline void StringView::set(const Ty& _container)
 	{
-		set(_container.data(), _container.length() );
+		set(_container.data(), int32_t(_container.length() ) );
 	}
 
-	inline void StringView::set(const StringView& _str)
+	inline void StringView::set(const StringView& _str, int32_t _start, int32_t _len)
 	{
-		set(_str.m_ptr, _str.m_len);
+		const int32_t start = min(_start, _str.m_len);
+		const int32_t len   = clamp(_str.m_len - start, 0, min(_len, _str.m_len) );
+		set(_str.m_ptr + start, len);
 	}
 
 	inline void StringView::clear()
diff --git a/include/bx/string.h b/include/bx/string.h
index 9830b76..132afa1 100644
--- a/include/bx/string.h
+++ b/include/bx/string.h
@@ -28,7 +28,7 @@ namespace bx
 		StringView();
 
 		///
-		StringView(const StringView& _rhs);
+		StringView(const StringView& _rhs, int32_t _start = 0, int32_t _len = INT32_MAX);
 
 		///
 		StringView& operator=(const char* _rhs);
@@ -68,7 +68,7 @@ namespace bx
 		void set(const char* _ptr, const char* _term);
 
 		///
-		void set(const StringView& _str);
+		void set(const StringView& _str, int32_t _start = 0, int32_t _len = INT32_MAX);
 
 		///
 		template<typename Ty>
diff --git a/src/string.cpp b/src/string.cpp
index f6f7cf9..649323a 100644
--- a/src/string.cpp
+++ b/src/string.cpp
@@ -690,7 +690,7 @@ namespace bx
 			Param()
 				: width(0)
 				, base(10)
-				, prec(6)
+				, prec(INT32_MAX)
 				, fill(' ')
 				, bits(0)
 				, left(false)
@@ -701,8 +701,8 @@ namespace bx
 			}
 
 			int32_t width;
-			uint32_t base;
-			uint32_t prec;
+			int32_t base;
+			int32_t prec;
 			char fill;
 			uint8_t bits;
 			bool left;
@@ -760,7 +760,7 @@ namespace bx
 
 		static int32_t write(WriterI* _writer, const char* _str, const Param& _param, Error* _err)
 		{
-			return write(_writer, _str, INT32_MAX, _param, _err);
+			return write(_writer, _str, _param.prec, _param, _err);
 		}
 
 		static int32_t write(WriterI* _writer, int32_t _i, const Param& _param, Error* _err)
@@ -833,10 +833,11 @@ namespace bx
 			const char* dot = strFind(str, INT32_MAX, '.');
 			if (NULL != dot)
 			{
+				const int32_t prec = INT32_MAX == _param.prec ? 6 : _param.prec;
 				const int32_t precLen = int32_t(
 						dot
-						+ uint32_min(_param.prec + _param.spec, 1)
-						+ _param.prec
+						+ uint32_min(prec + _param.spec, 1)
+						+ prec
 						- str
 						);
 				if (precLen > len)
diff --git a/tests/vsnprintf_test.cpp b/tests/vsnprintf_test.cpp
index ad73887..035c17b 100644
--- a/tests/vsnprintf_test.cpp
+++ b/tests/vsnprintf_test.cpp
@@ -164,4 +164,12 @@ TEST_CASE("vsnprintf", "")
 
 	REQUIRE(test("hello               ", "%-20s", "hello") );
 	REQUIRE(test("hello, world!", "%s, %s!", "hello", "world") );
+
+	bx::StringView str("0hello1world2");
+	bx::StringView hello(str, 1, 5);
+	bx::StringView world(str, 7, 5);
+	REQUIRE(test("hello, world!", "%.*s, %.*s!"
+		, hello.getLength(), hello.getPtr()
+		, world.getLength(), world.getPtr()
+		) );
 }