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