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