Prepare fuzzing engine

src/windows-emulator/logger.cpp

@@ -0,0 +1,100 @@
+#include "std_include.hpp"
+#include "logger.hpp"
+
+#include <utils/finally.hpp>
+
+namespace
+{
+#ifdef _WIN32
+#define COLOR(win, posix) win
+	using color_type = WORD;
+#else
+#define COLOR(win, posix) posix
+	using color_type = const char*;
+#endif
+
+	color_type get_reset_color()
+	{
+		return COLOR(7, "\033[0m");
+	}
+
+	color_type get_color_type(const color c)
+	{
+		using enum color;
+
+		switch (c)
+		{
+		case black: return COLOR(0x8, "\033[0;90m");
+		case red: return COLOR(0xC, "\033[0;91m");
+		case green: return COLOR(0xA, "\033[0;92m");
+		case yellow: return COLOR(0xE, "\033[0;93m");
+		case blue: return COLOR(0x9, "\033[0;94m");
+		case cyan: return COLOR(0xB, "\033[0;96m");
+		case pink: return COLOR(0xD, "\033[0;95m");
+		case white: return COLOR(0xF, "\033[0;97m");
+		case dark_gray: return COLOR(0x8, "\033[0;97m");
+		case gray:
+		default: return get_reset_color();
+		}
+	}
+
+#ifdef _WIN32
+	HANDLE get_console_handle()
+	{
+		return GetStdHandle(STD_OUTPUT_HANDLE);
+	}
+#endif
+
+	void set_color(const color_type color)
+	{
+#ifdef _WIN32
+		SetConsoleTextAttribute(get_console_handle(), color);
+#else
+		printf("%s", color);
+#endif
+	}
+
+	void reset_color()
+	{
+		(void)fflush(stdout);
+		set_color(get_reset_color());
+		(void)fflush(stdout);
+	}
+
+	std::string_view format(va_list* ap, const char* message)
+	{
+		thread_local char buffer[0x1000];
+
+#ifdef _WIN32
+		const int count = _vsnprintf_s(buffer, sizeof(buffer), sizeof(buffer), message, *ap);
+#else
+		const int count = vsnprintf(buffer, sizeof(buffer), message, *ap);
+#endif
+
+		if (count < 0) return {};
+		return {buffer, static_cast<size_t>(count)};
+	}
+
+	void print_colored(const std::string_view& line, const color_type base_color)
+	{
+		const auto _ = utils::finally(&reset_color);
+		set_color(base_color);
+		(void)fwrite(line.data(), 1, line.size(), stdout);
+	}
+}
+
+void logger::print(const color c, const char* message, ...) const
+{
+	if (this->disable_output_)
+	{
+		return;
+	}
+
+	va_list ap;
+	va_start(ap, message);
+
+	const auto data = format(&ap, message);
+	print_colored(data, get_color_type(c));
+
+	va_end(ap);
+}