Use exceptions instead of panic

misc/exception.h

@@ -0,0 +1,6 @@
+#include <stdexcept>
+
+class EmulatorException : public std::runtime_error {
+  using std::runtime_error::runtime_error;
+  using std::runtime_error::what;
+};

misc/panic.h

@@ -1,9 +0,0 @@
-#include <cstdio>
-#include <cstdlib>
-
-template <typename... Args>
-inline void panic [[noreturn]] (Args... args)
-{
-  printf(args...);
-  exit(1);
-}

misc/types.h

@@ -1,9 +1,11 @@
 #pragma once
 
-typedef unsigned char u8;
-typedef unsigned short u16;
-typedef unsigned int u32;
+#include <cstdint>
 
-typedef signed char s8;
-typedef signed short s16;
-typedef signed int s32;
+typedef uint8_t u8;
+typedef uint16_t u16;
+typedef uint32_t u32;
+
+typedef int8_t s8;
+typedef int16_t s16;
+typedef int32_t s32;