Migrate lstate

Author: khvzak

build/build.rs

@@ -22,7 +22,6 @@ fn main() {
         .file("build/lobject.c")
         .file("build/loslib.c")
         .file("build/lparser.c")
-        .file("build/lstate.c")
         .file("build/lstrlib.c")
         .file("build/ltable.c")
         .file("build/ltablib.c")

build/lstate.c

@@ -0,0 +1,15 @@
+/*
+** Lua API
+*/
+
+use crate::lstate::lua_State;
+use crate::types::lua_Number;
+
+pub unsafe fn api_incr_top(L: *mut lua_State) {
+    (*L).top = (*L).top.add(1);
+    debug_assert!((*L).top <= (*(*L).ci).top, "stack overflow");
+}
+
+extern "C" {
+    pub fn lua_version(L: *mut lua_State) -> *const lua_Number;
+}

src/lapi.rs

@@ -12,4 +12,5 @@ extern "C" {
         p2: *const TValue,
         msg: *const c_char,
     ) -> !;
+    pub fn luaG_runerror(L: *mut lua_State, fmt: *const c_char, args: ...) -> !;
 }