1 /* 2 ** $Id: lvm.h $ 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 F2Ieq 37 #endif 38 39 40 /* 41 ** Rounding modes for float->integer coercion 42 */ 43 typedef enum { 44 F2Ieq, /* no rounding; accepts only integral values */ 45 F2Ifloor, /* takes the floor of the number */ 46 F2Iceil /* takes the ceil of the number */ 47 } F2Imod; 48 49 50 /* convert an object to a float (including string coercion) */ 51 #define tonumber(o,n) \ 52 (ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n)) 53 54 55 /* convert an object to a float (without string coercion) */ 56 #define tonumberns(o,n) \ 57 (ttisfloat(o) ? ((n) = fltvalue(o), 1) : \ 58 (ttisinteger(o) ? ((n) = cast_num(ivalue(o)), 1) : 0)) 59 60 61 /* convert an object to an integer (including string coercion) */ 62 #define tointeger(o,i) \ 63 (l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \ 64 : luaV_tointeger(o,i,LUA_FLOORN2I)) 65 66 67 /* convert an object to an integer (without string coercion) */ 68 #define tointegerns(o,i) \ 69 (l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \ 70 : luaV_tointegerns(o,i,LUA_FLOORN2I)) 71 72 73 #define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2)) 74 75 #define luaV_rawequalobj(t1,t2) luaV_equalobj(NULL,t1,t2) 76 77 78 /* 79 ** fast track for 'gettable': if 't' is a table and 't[k]' is present, 80 ** return 1 with 'slot' pointing to 't[k]' (position of final result). 81 ** Otherwise, return 0 (meaning it will have to check metamethod) 82 ** with 'slot' pointing to an empty 't[k]' (if 't' is a table) or NULL 83 ** (otherwise). 'f' is the raw get function to use. 84 */ 85 #define luaV_fastget(L,t,k,slot,f) \ 86 (!ttistable(t) \ 87 ? (slot = NULL, 0) /* not a table; 'slot' is NULL and result is 0 */ \ 88 : (slot = f(hvalue(t), k), /* else, do raw access */ \ 89 !isempty(slot))) /* result not empty? */ 90 91 92 /* 93 ** Special case of 'luaV_fastget' for integers, inlining the fast case 94 ** of 'luaH_getint'. 95 */ 96 #define luaV_fastgeti(L,t,k,slot) \ 97 (!ttistable(t) \ 98 ? (slot = NULL, 0) /* not a table; 'slot' is NULL and result is 0 */ \ 99 : (slot = (l_castS2U(k) - 1u < hvalue(t)->alimit) \ 100 ? &hvalue(t)->array[k - 1] : luaH_getint(hvalue(t), k), \ 101 !isempty(slot))) /* result not empty? */ 102 103 104 /* 105 ** Finish a fast set operation (when fast get succeeds). In that case, 106 ** 'slot' points to the place to put the value. 107 */ 108 #define luaV_finishfastset(L,t,slot,v) \ 109 { setobj2t(L, cast(TValue *,slot), v); \ 110 luaC_barrierback(L, gcvalue(t), v); } 111 112 113 114 115 LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2); 116 LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r); 117 LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r); 118 LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n); 119 LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, F2Imod mode); 120 LUAI_FUNC int luaV_tointegerns (const TValue *obj, lua_Integer *p, 121 F2Imod mode); 122 LUAI_FUNC int luaV_flttointeger (lua_Number n, lua_Integer *p, F2Imod mode); 123 LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key, 124 StkId val, const TValue *slot); 125 LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key, 126 TValue *val, const TValue *slot); 127 LUAI_FUNC void luaV_finishOp (lua_State *L); 128 LUAI_FUNC void luaV_execute (lua_State *L, CallInfo *ci); 129 LUAI_FUNC void luaV_concat (lua_State *L, int total); 130 LUAI_FUNC lua_Integer luaV_idiv (lua_State *L, lua_Integer x, lua_Integer y); 131 LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y); 132 LUAI_FUNC lua_Number luaV_modf (lua_State *L, lua_Number x, lua_Number y); 133 LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y); 134 LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb); 135 136 #endif 137