Add some functionality to make filerd more usable

include/rexy/filerd.hpp

@@ -39,6 +39,7 @@ namespace rexy{
 	{
 	private:
 		std::FILE* m_fp = nullptr;
+		bool m_finished = false;
 
 	public:
 		constexpr filerd(void)noexcept = default;
@@ -65,6 +66,8 @@ namespace rexy{
 		const std::FILE* get(void)const noexcept;
 		operator bool(void)const noexcept;
 
+		bool eof(void)const;
+
 		std::size_t read(char* dest, std::size_t bytes)noexcept;
 		rexy::string read(std::size_t bytes)noexcept;
 		rexy::string readln(std::size_t max = 0)noexcept;

src/filerd.cpp

@@ -78,8 +78,16 @@ namespace rexy{
 		return m_fp;
 	}
 
+	bool filerd::eof(void)const{
+		return m_finished;
+	}
+
 	std::size_t filerd::read(char* dest, std::size_t bytes)noexcept{
-		return std::fread(dest, 1, bytes, m_fp);
+		const auto rdcnt = std::fread(dest, 1, bytes, m_fp);
+		if(rdcnt < bytes){
+			m_finished = true;
+		}
+		return rdcnt;
 	}
 	rexy::string filerd::read(std::size_t bytes)noexcept{
 		rexy::string ret;
@@ -98,13 +106,16 @@ namespace rexy{
 			if(++count == max)
 				break;
 		}
+		if(c == EOF){
+			m_finished = true;
+		}
 		return ret;
 	}
 	rexy::buffer<char> filerd::read_bin(std::size_t bytes)
 		noexcept(std::is_nothrow_constructible<rexy::buffer<char>, char*, std::size_t>::value)
 	{
 		rexy::buffer<char> ret{bytes};
-		std::size_t written = read(ret.data(), bytes);
+		const auto written = read(ret.data(), bytes);
 		ret.set_size(written);
 		return ret;
 	}