lvm.h (3685B)
1 /* 2 ** $Id: lvm.h,v 2.41.1.1 2017/04/19 17:20:42 roberto Exp $ 3 ** Lua virtual machine 4 ** See Copyright Notice in lua.h 5 */ 6 7 #ifndef lvm_h 8 #define lvm_h 9 10 11 #include "ldo.h" 12 #include "lobject.h" 13 #include "ltm.h" 14 15 16 #if !defined(LUA_NOCVTN2S) 17 #define cvt2str(o) ttisnumber(o) 18 #else 19 #define cvt2str(o) 0 /* no conversion from numbers to strings */ 20 #endif 21 22 23 #if !defined(LUA_NOCVTS2N) 24 #define cvt2num(o) ttisstring(o) 25 #else 26 #define cvt2num(o) 0 /* no conversion from strings to numbers */ 27 #endif 28 29 30 /* 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 33 ** integral values) 34 */ 35 #if !defined(LUA_FLOORN2I) 36 #define LUA_FLOORN2I 0 37 #endif 38 39 40 #define tonumber(o,n) \ 41 (ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n)) 42 43 #define tointeger(o,i) \ 44 (ttisinteger(o) ? (*(i) = ivalue(o), 1) : luaV_tointeger(o,i,LUA_FLOORN2I)) 45 46 #define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2)) 47 48 #define luaV_rawequalobj(t1,t2) luaV_equalobj(NULL,t1,t2) 49 50 51 /* 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. 57 */ 58 #define luaV_fastget(L,t,k,slot,f) \ 59 (!ttistable(t) \ 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? */ 63 64 /* 65 ** standard implementation for 'gettable' 66 */ 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); } 70 71 72 /* 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. 79 */ 80 #define luaV_fastset(L,t,k,slot,f,v) \ 81 (!ttistable(t) \ 82 ? (slot = NULL, 0) \ 83 : (slot = f(hvalue(t), k), \ 84 ttisnil(slot) ? 0 \ 85 : (luaC_barrierback(L, hvalue(t), v), \ 86 setobj2t(L, cast(TValue *,slot), v), \ 87 1))) 88 89 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); } 93 94 95 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); 112 113 #endif