fix: use uintptr over usize in locations where applicable

src/dat/mcx.c

@@ -74,7 +74,7 @@ static int mcx_loadchunk(const u8 *restrict buf, const i32 *restrict table, int
 /* Moves chunks `src_s` to `src_e` (inclusive) from `src`, back onto `dst`. */
 static void mvchunks(u8 *dst, u8 *src, u32 *restrict table, int src_s, int src_e) {
 	assert(src > dst);
-	usize len = src - dst; // acquire the amount of bytes that we shall move
+	uintptr len = src - dst; // acquire the amount of bytes that we shall move
 	assert(!(len % SECTOR));
 
 	// count how many bytes we need to move, whilst updating location data

src/types.h

@@ -19,6 +19,14 @@ typedef __SIZE_TYPE__        usize;
 typedef __INTPTR_TYPE__      intptr;
 typedef __UINTPTR_TYPE__     uintptr;
 
+#if __SIZEOF_SIZE_T__ == __SIZEOF_LONG_LONG__
+typedef llong ssize;
+#elif __SIZEOF_SIZE_T__ == __SIZEOF_LONG__
+typedef long ssize;
+#elif __SIZEOF_SIZE_T__ == __SIZEOF_INT__
+typedef int ssize;
+#endif
+
 #if __SIZEOF_FLOAT__ == 4
 typedef float f32;
 #endif