From 43a2ee6ea1b7825c1892de614cb38a3fe487a19f Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Tue, 16 Sep 1997 16:25:59 -0300
Subject: Stack and Call structure of Lua

---
 ldo.h | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 ldo.h

(limited to 'ldo.h')

diff --git a/ldo.h b/ldo.h
new file mode 100644
index 00000000..edcd1b93
--- /dev/null
+++ b/ldo.h
@@ -0,0 +1,62 @@
+/*
+** $Id: $
+** Stack and Call structure of Lua
+** See Copyright Notice in lua.h
+*/
+
+#ifndef ldo_h
+#define ldo_h
+
+
+#include "lobject.h"
+
+
+typedef int StkId;  /* index to luaD_stack.stack elements */
+
+#define MULT_RET        255
+
+
+extern struct Stack {
+  TObject *last;
+  TObject *stack;
+  TObject *top;
+} luaD_stack;
+
+
+extern struct C_Lua_Stack {
+  StkId base;  /* when Lua calls C or C calls Lua, points to */
+               /* the first slot after the last parameter. */
+  StkId lua2C; /* points to first element of "array" lua2C */
+  int num;     /* size of "array" lua2C */
+} luaD_Cstack;
+
+
+extern TObject luaD_errorim;
+
+
+/*
+** macro to increment stack top.
+** There must be always an empty slot at the luaD_stack.top
+*/
+#define incr_top { if (luaD_stack.top >= luaD_stack.last) luaD_checkstack(1); \
+                   luaD_stack.top++; }
+
+
+/* macros to convert from lua_Object to (TObject *) and back */
+
+#define Address(lo)     ((lo)+luaD_stack.stack-1)
+#define Ref(st)         ((st)-luaD_stack.stack+1)
+
+void luaD_adjusttop (StkId newtop);
+void luaD_openstack (int nelems);
+void luaD_lineHook (int line);
+void luaD_callHook (StkId base, lua_Type type, int isreturn);
+void luaD_call (StkId base, int nResults);
+void luaD_callTM (TObject *f, int nParams, int nResults);
+int luaD_protectedrun (int nResults);
+void luaD_gcIM (TObject *o);
+void luaD_travstack (int (*fn)(TObject *));
+void luaD_checkstack (int n);
+
+
+#endif
-- 
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