diff options
Diffstat (limited to 'lua/lvm.h')
| -rw-r--r-- | lua/lvm.h | 100 |
1 files changed, 85 insertions, 15 deletions
@@ -1,5 +1,5 @@ /* -** $Id: lvm.h,v 2.18.1.1 2013/04/12 18:48:47 roberto Exp $ +** $Id: lvm.h,v 2.39 2015/09/09 13:44:07 roberto Exp $ ** Lua virtual machine ** See Copyright Notice in lua.h */ @@ -13,32 +13,102 @@ #include "ltm.h" -#define tostring(L,o) (ttisstring(o) || (luaV_tostring(L, o))) +#if !defined(LUA_NOCVTN2S) +#define cvt2str(o) ttisnumber(o) +#else +#define cvt2str(o) 0 /* no conversion from numbers to strings */ +#endif + + +#if !defined(LUA_NOCVTS2N) +#define cvt2num(o) ttisstring(o) +#else +#define cvt2num(o) 0 /* no conversion from strings to numbers */ +#endif + + +/* +** You can define LUA_FLOORN2I if you want to convert floats to integers +** by flooring them (instead of raising an error if they are not +** integral values) +*/ +#if !defined(LUA_FLOORN2I) +#define LUA_FLOORN2I 0 +#endif + + +#define tonumber(o,n) \ + (ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n)) -#define tonumber(o,n) (ttisnumber(o) || (((o) = luaV_tonumber(o,n)) != NULL)) +#define tointeger(o,i) \ + (ttisinteger(o) ? (*(i) = ivalue(o), 1) : luaV_tointeger(o,i,LUA_FLOORN2I)) -#define equalobj(L,o1,o2) (ttisequal(o1, o2) && luaV_equalobj_(L, o1, o2)) +#define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2)) -#define luaV_rawequalobj(o1,o2) equalobj(NULL,o1,o2) +#define luaV_rawequalobj(t1,t2) luaV_equalobj(NULL,t1,t2) + + +/* +** fast track for 'gettable': 1 means 'aux' points to resulted value; +** 0 means 'aux' is metamethod (if 't' is a table) or NULL. 'f' is +** the raw get function to use. +*/ +#define luaV_fastget(L,t,k,aux,f) \ + (!ttistable(t) \ + ? (aux = NULL, 0) /* not a table; 'aux' is NULL and result is 0 */ \ + : (aux = f(hvalue(t), k), /* else, do raw access */ \ + !ttisnil(aux) ? 1 /* result not nil? 'aux' has it */ \ + : (aux = fasttm(L, hvalue(t)->metatable, TM_INDEX), /* get metamethod */\ + aux != NULL ? 0 /* has metamethod? must call it */ \ + : (aux = luaO_nilobject, 1)))) /* else, final result is nil */ + +/* +** standard implementation for 'gettable' +*/ +#define luaV_gettable(L,t,k,v) { const TValue *aux; \ + if (luaV_fastget(L,t,k,aux,luaH_get)) { setobj2s(L, v, aux); } \ + else luaV_finishget(L,t,k,v,aux); } + + +/* +** Fast track for set table. If 't' is a table and 't[k]' is not nil, +** call GC barrier, do a raw 't[k]=v', and return true; otherwise, +** return false with 'slot' equal to NULL (if 't' is not a table) or +** 'nil'. (This is needed by 'luaV_finishget'.) Note that, if the macro +** returns true, there is no need to 'invalidateTMcache', because the +** call is not creating a new entry. +*/ +#define luaV_fastset(L,t,k,slot,f,v) \ + (!ttistable(t) \ + ? (slot = NULL, 0) \ + : (slot = f(hvalue(t), k), \ + ttisnil(slot) ? 0 \ + : (luaC_barrierback(L, hvalue(t), v), \ + setobj2t(L, cast(TValue *,slot), v), \ + 1))) -/* not to called directly */ -LUAI_FUNC int luaV_equalobj_ (lua_State *L, const TValue *t1, const TValue *t2); +#define luaV_settable(L,t,k,v) { const TValue *slot; \ + if (!luaV_fastset(L,t,k,slot,luaH_get,v)) \ + luaV_finishset(L,t,k,v,slot); } + +LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2); LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r); LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r); -LUAI_FUNC const TValue *luaV_tonumber (const TValue *obj, TValue *n); -LUAI_FUNC int luaV_tostring (lua_State *L, StkId obj); -LUAI_FUNC void luaV_gettable (lua_State *L, const TValue *t, TValue *key, - StkId val); -LUAI_FUNC void luaV_settable (lua_State *L, const TValue *t, TValue *key, - StkId val); +LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n); +LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, int mode); +LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key, + StkId val, const TValue *tm); +LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key, + StkId val, const TValue *oldval); LUAI_FUNC void luaV_finishOp (lua_State *L); LUAI_FUNC void luaV_execute (lua_State *L); LUAI_FUNC void luaV_concat (lua_State *L, int total); -LUAI_FUNC void luaV_arith (lua_State *L, StkId ra, const TValue *rb, - const TValue *rc, TMS op); +LUAI_FUNC lua_Integer luaV_div (lua_State *L, lua_Integer x, lua_Integer y); +LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y); +LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y); LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb); #endif |