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65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
/*
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** $Id: ldo.h,v 1.1 1997/09/16 19:25:59 roberto Exp roberto $
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** Stack and Call structure of Lua
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** See Copyright Notice in lua.h
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*/
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#ifndef ldo_h
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#define ldo_h
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#include "lobject.h"
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typedef int StkId; /* index to luaD_stack.stack elements */
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#define MULT_RET 255
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extern struct Stack {
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TObject *last;
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TObject *stack;
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TObject *top;
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} luaD_stack;
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extern struct C_Lua_Stack {
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StkId base; /* when Lua calls C or C calls Lua, points to */
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/* the first slot after the last parameter. */
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StkId lua2C; /* points to first element of "array" lua2C */
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int num; /* size of "array" lua2C */
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} luaD_Cstack;
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extern TObject luaD_errorim;
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/*
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** macro to increment stack top.
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** There must be always an empty slot at the luaD_stack.top
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*/
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#define incr_top { if (luaD_stack.top >= luaD_stack.last) luaD_checkstack(1); \
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luaD_stack.top++; }
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/* macros to convert from lua_Object to (TObject *) and back */
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#define Address(lo) ((lo)+luaD_stack.stack-1)
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#define Ref(st) ((st)-luaD_stack.stack+1)
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void luaD_init (void);
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void luaD_adjusttop (StkId newtop);
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void luaD_openstack (int nelems);
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void luaD_lineHook (int line);
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void luaD_callHook (StkId base, lua_Type type, int isreturn);
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void luaD_call (StkId base, int nResults);
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void luaD_callTM (TObject *f, int nParams, int nResults);
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int luaD_protectedrun (int nResults);
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void luaD_gcIM (TObject *o);
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void luaD_travstack (int (*fn)(TObject *));
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void luaD_checkstack (int n);
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#endif
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