2 ** $Id: lvm.h,v 2.39 2015/09/09 13:44:07 roberto Exp $
4 ** See Copyright Notice in lua.h
16 #if !defined(LUA_NOCVTN2S)
17 #define cvt2str(o) ttisnumber(o)
19 #define cvt2str(o) 0 /* no conversion from numbers to strings */
23 #if !defined(LUA_NOCVTS2N)
24 #define cvt2num(o) ttisstring(o)
26 #define cvt2num(o) 0 /* no conversion from strings to numbers */
31 ** You can define LUA_FLOORN2I if you want to convert floats to integers
32 ** by flooring them (instead of raising an error if they are not
35 #if !defined(LUA_FLOORN2I)
36 #define LUA_FLOORN2I 0
40 #define tonumber(o,n) \
41 (ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n))
43 #define tointeger(o,i) \
44 (ttisinteger(o) ? (*(i) = ivalue(o), 1) : luaV_tointeger(o,i,LUA_FLOORN2I))
46 #define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2))
48 #define luaV_rawequalobj(t1,t2) luaV_equalobj(NULL,t1,t2)
52 ** fast track for 'gettable': 1 means 'aux' points to resulted value;
53 ** 0 means 'aux' is metamethod (if 't' is a table) or NULL. 'f' is
54 ** the raw get function to use.
56 #define luaV_fastget(L,t,k,aux,f) \
58 ? (aux = NULL, 0) /* not a table; 'aux' is NULL and result is 0 */ \
59 : (aux = f(hvalue(t), k), /* else, do raw access */ \
60 !ttisnil(aux) ? 1 /* result not nil? 'aux' has it */ \
61 : (aux = fasttm(L, hvalue(t)->metatable, TM_INDEX), /* get metamethod */\
62 aux != NULL ? 0 /* has metamethod? must call it */ \
63 : (aux = luaO_nilobject, 1)))) /* else, final result is nil */
66 ** standard implementation for 'gettable'
68 #define luaV_gettable(L,t,k,v) { const TValue *aux; \
69 if (luaV_fastget(L,t,k,aux,luaH_get)) { setobj2s(L, v, aux); } \
70 else luaV_finishget(L,t,k,v,aux); }
74 ** Fast track for set table. If 't' is a table and 't[k]' is not nil,
75 ** call GC barrier, do a raw 't[k]=v', and return true; otherwise,
76 ** return false with 'slot' equal to NULL (if 't' is not a table) or
77 ** 'nil'. (This is needed by 'luaV_finishget'.) Note that, if the macro
78 ** returns true, there is no need to 'invalidateTMcache', because the
79 ** call is not creating a new entry.
81 #define luaV_fastset(L,t,k,slot,f,v) \
84 : (slot = f(hvalue(t), k), \
86 : (luaC_barrierback(L, hvalue(t), v), \
87 setobj2t(L, cast(TValue *,slot), v), \
91 #define luaV_settable(L,t,k,v) { const TValue *slot; \
92 if (!luaV_fastset(L,t,k,slot,luaH_get,v)) \
93 luaV_finishset(L,t,k,v,slot); }
97 LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2);
98 LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r);
99 LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r);
100 LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n);
101 LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, int mode);
102 LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key,
103 StkId val, const TValue *tm);
104 LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key,
105 StkId val, const TValue *oldval);
106 LUAI_FUNC void luaV_finishOp (lua_State *L);
107 LUAI_FUNC void luaV_execute (lua_State *L);
108 LUAI_FUNC void luaV_concat (lua_State *L, int total);
109 LUAI_FUNC lua_Integer luaV_div (lua_State *L, lua_Integer x, lua_Integer y);
110 LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y);
111 LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y);
112 LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb);