1 /* $NetBSD: ldo.h,v 1.1.1.1 2010/10/31 11:16:56 mbalmer Exp $ */ 2 3 /* 4 ** Id: ldo.h,v 2.7.1.1 2007/12/27 13:02:25 roberto Exp 5 ** Stack and Call structure of Lua 6 ** See Copyright Notice in lua.h 7 */ 8 9 #ifndef ldo_h 10 #define ldo_h 11 12 13 #include "lobject.h" 14 #include "lstate.h" 15 #include "lzio.h" 16 17 18 #define luaD_checkstack(L,n) \ 19 if ((char *)L->stack_last - (char *)L->top <= (n)*(int)sizeof(TValue)) \ 20 luaD_growstack(L, n); \ 21 else condhardstacktests(luaD_reallocstack(L, L->stacksize - EXTRA_STACK - 1)); 22 23 24 #define incr_top(L) {luaD_checkstack(L,1); L->top++;} 25 26 #define savestack(L,p) ((char *)(p) - (char *)L->stack) 27 #define restorestack(L,n) ((TValue *)((char *)L->stack + (n))) 28 29 #define saveci(L,p) ((char *)(p) - (char *)L->base_ci) 30 #define restoreci(L,n) ((CallInfo *)((char *)L->base_ci + (n))) 31 32 33 /* results from luaD_precall */ 34 #define PCRLUA 0 /* initiated a call to a Lua function */ 35 #define PCRC 1 /* did a call to a C function */ 36 #define PCRYIELD 2 /* C funtion yielded */ 37 38 39 /* type of protected functions, to be ran by `runprotected' */ 40 typedef void (*Pfunc) (lua_State *L, void *ud); 41 42 LUAI_FUNC int luaD_protectedparser (lua_State *L, ZIO *z, const char *name); 43 LUAI_FUNC void luaD_callhook (lua_State *L, int event, int line); 44 LUAI_FUNC int luaD_precall (lua_State *L, StkId func, int nresults); 45 LUAI_FUNC void luaD_call (lua_State *L, StkId func, int nResults); 46 LUAI_FUNC int luaD_pcall (lua_State *L, Pfunc func, void *u, 47 ptrdiff_t oldtop, ptrdiff_t ef); 48 LUAI_FUNC int luaD_poscall (lua_State *L, StkId firstResult); 49 LUAI_FUNC void luaD_reallocCI (lua_State *L, int newsize); 50 LUAI_FUNC void luaD_reallocstack (lua_State *L, int newsize); 51 LUAI_FUNC void luaD_growstack (lua_State *L, int n); 52 53 LUAI_FUNC void luaD_throw (lua_State *L, int errcode); 54 LUAI_FUNC int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud); 55 56 LUAI_FUNC void luaD_seterrorobj (lua_State *L, int errcode, StkId oldtop); 57 58 #endif 59 60