1 /* $NetBSD: lvm.h,v 1.9 2017/04/26 13:17:33 mbalmer Exp $ */ 2 3 /* 4 ** Id: lvm.h,v 2.41 2016/12/22 13:08:50 roberto Exp 5 ** Lua virtual machine 6 ** See Copyright Notice in lua.h 7 */ 8 9 #ifndef lvm_h 10 #define lvm_h 11 12 13 #include "ldo.h" 14 #include "lobject.h" 15 #include "ltm.h" 16 17 18 #if !defined(LUA_NOCVTN2S) 19 #define cvt2str(o) ttisnumber(o) 20 #else 21 #define cvt2str(o) 0 /* no conversion from numbers to strings */ 22 #endif 23 24 25 #if !defined(LUA_NOCVTS2N) 26 #define cvt2num(o) ttisstring(o) 27 #else 28 #define cvt2num(o) 0 /* no conversion from strings to numbers */ 29 #endif 30 31 32 /* 33 ** You can define LUA_FLOORN2I if you want to convert floats to integers 34 ** by flooring them (instead of raising an error if they are not 35 ** integral values) 36 */ 37 #if !defined(LUA_FLOORN2I) 38 #define LUA_FLOORN2I 0 39 #endif 40 41 42 #ifndef _KERNEL 43 #define tonumber(o,n) \ 44 (ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n)) 45 #else /* _KERNEL */ 46 #define tonumber tointeger 47 #endif /* _KERNEL */ 48 49 #define tointeger(o,i) \ 50 (ttisinteger(o) ? (*(i) = ivalue(o), 1) : luaV_tointeger(o,i,LUA_FLOORN2I)) 51 52 #define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2)) 53 54 #define luaV_rawequalobj(t1,t2) luaV_equalobj(NULL,t1,t2) 55 56 57 /* 58 ** fast track for 'gettable': if 't' is a table and 't[k]' is not nil, 59 ** return 1 with 'slot' pointing to 't[k]' (final result). Otherwise, 60 ** return 0 (meaning it will have to check metamethod) with 'slot' 61 ** pointing to a nil 't[k]' (if 't' is a table) or NULL (otherwise). 62 ** 'f' is the raw get function to use. 63 */ 64 #define luaV_fastget(L,t,k,slot,f) \ 65 (!ttistable(t) \ 66 ? (slot = NULL, 0) /* not a table; 'slot' is NULL and result is 0 */ \ 67 : (slot = f(hvalue(t), k), /* else, do raw access */ \ 68 !ttisnil(slot))) /* result not nil? */ 69 70 /* 71 ** standard implementation for 'gettable' 72 */ 73 #define luaV_gettable(L,t,k,v) { const TValue *slot; \ 74 if (luaV_fastget(L,t,k,slot,luaH_get)) { setobj2s(L, v, slot); } \ 75 else luaV_finishget(L,t,k,v,slot); } 76 77 78 /* 79 ** Fast track for set table. If 't' is a table and 't[k]' is not nil, 80 ** call GC barrier, do a raw 't[k]=v', and return true; otherwise, 81 ** return false with 'slot' equal to NULL (if 't' is not a table) or 82 ** 'nil'. (This is needed by 'luaV_finishget'.) Note that, if the macro 83 ** returns true, there is no need to 'invalidateTMcache', because the 84 ** call is not creating a new entry. 85 */ 86 #define luaV_fastset(L,t,k,slot,f,v) \ 87 (!ttistable(t) \ 88 ? (slot = NULL, 0) \ 89 : (slot = f(hvalue(t), k), \ 90 ttisnil(slot) ? 0 \ 91 : (luaC_barrierback(L, hvalue(t), v), \ 92 setobj2t(L, cast(TValue *,slot), v), \ 93 1))) 94 95 96 #define luaV_settable(L,t,k,v) { const TValue *slot; \ 97 if (!luaV_fastset(L,t,k,slot,luaH_get,v)) \ 98 luaV_finishset(L,t,k,v,slot); } 99 100 101 102 LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2); 103 LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r); 104 LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r); 105 LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n); 106 LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, int mode); 107 LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key, 108 StkId val, const TValue *slot); 109 LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key, 110 StkId val, const TValue *slot); 111 LUAI_FUNC void luaV_finishOp (lua_State *L); 112 LUAI_FUNC void luaV_execute (lua_State *L); 113 LUAI_FUNC void luaV_concat (lua_State *L, int total); 114 LUAI_FUNC lua_Integer luaV_div (lua_State *L, lua_Integer x, lua_Integer y); 115 LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y); 116 LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y); 117 LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb); 118 119 #endif 120