2 ** $Id: lvm.h,v 2.41 2016/12/22 13:08:50 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': if 't' is a table and 't[k]' is not nil,
53 ** return 1 with 'slot' pointing to 't[k]' (final result). Otherwise,
54 ** return 0 (meaning it will have to check metamethod) with 'slot'
55 ** pointing to a nil 't[k]' (if 't' is a table) or NULL (otherwise).
56 ** 'f' is the raw get function to use.
58 #define luaV_fastget(L,t,k,slot,f) \
60 ? (slot = NULL, 0) /* not a table; 'slot' is NULL and result is 0 */ \
61 : (slot = f(hvalue(t), k), /* else, do raw access */ \
62 !ttisnil(slot))) /* result not nil? */
65 ** standard implementation for 'gettable'
67 #define luaV_gettable(L,t,k,v) { const TValue *slot; \
68 if (luaV_fastget(L,t,k,slot,luaH_get)) { setobj2s(L, v, slot); } \
69 else luaV_finishget(L,t,k,v,slot); }
73 ** Fast track for set table. If 't' is a table and 't[k]' is not nil,
74 ** call GC barrier, do a raw 't[k]=v', and return true; otherwise,
75 ** return false with 'slot' equal to NULL (if 't' is not a table) or
76 ** 'nil'. (This is needed by 'luaV_finishget'.) Note that, if the macro
77 ** returns true, there is no need to 'invalidateTMcache', because the
78 ** call is not creating a new entry.
80 #define luaV_fastset(L,t,k,slot,f,v) \
83 : (slot = f(hvalue(t), k), \
85 : (luaC_barrierback(L, hvalue(t), v), \
86 setobj2t(L, cast(TValue *,slot), v), \
90 #define luaV_settable(L,t,k,v) { const TValue *slot; \
91 if (!luaV_fastset(L,t,k,slot,luaH_get,v)) \
92 luaV_finishset(L,t,k,v,slot); }
96 LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2);
97 LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r);
98 LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r);
99 LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n);
100 LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, int mode);
101 LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key,
102 StkId val, const TValue *slot);
103 LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key,
104 StkId val, const TValue *slot);
105 LUAI_FUNC void luaV_finishOp (lua_State *L);
106 LUAI_FUNC void luaV_execute (lua_State *L);
107 LUAI_FUNC void luaV_concat (lua_State *L, int total);
108 LUAI_FUNC lua_Integer luaV_div (lua_State *L, lua_Integer x, lua_Integer y);
109 LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y);
110 LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y);
111 LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb);