Add io::read_full function to read whole input stream into std::vector

libs/io/include/psemek/io/stream.hpp

@@ -5,6 +5,8 @@
 #include <cstddef>
 #include <memory>
 
+#include <vector>
+
 namespace psemek::io
 {
 
@@ -29,4 +31,6 @@ namespace psemek::io
 	std::unique_ptr<ostream> std_out();
 	std::unique_ptr<ostream> std_err();
 
+	std::vector<char> read_full(istream && stream);
+
 }

libs/io/source/stream.cpp

@@ -46,4 +46,22 @@ namespace psemek::io
 		return std::make_unique<file_ostream>(stderr);
 	}
 
+	std::vector<char> read_full(istream && stream)
+	{
+		std::size_t size = 0;
+		std::vector<char> result(1024);
+		while (true)
+		{
+			if (result.size() == size)
+				result.resize(result.size() * 2);
+
+			std::size_t count = stream.read(result.data() + size, result.size() - size);
+			if (count == 0)
+				break;
+			size += count;
+		}
+		result.resize(size);
+		return result;
+	}
+
 }