18e3e3a7aSWarner Losh /* 20495ed39SKyle Evans ** $Id: lvm.h $ 38e3e3a7aSWarner Losh ** Lua virtual machine 48e3e3a7aSWarner Losh ** See Copyright Notice in lua.h 58e3e3a7aSWarner Losh */ 68e3e3a7aSWarner Losh 78e3e3a7aSWarner Losh #ifndef lvm_h 88e3e3a7aSWarner Losh #define lvm_h 98e3e3a7aSWarner Losh 108e3e3a7aSWarner Losh 118e3e3a7aSWarner Losh #include "ldo.h" 128e3e3a7aSWarner Losh #include "lobject.h" 138e3e3a7aSWarner Losh #include "ltm.h" 148e3e3a7aSWarner Losh 158e3e3a7aSWarner Losh 168e3e3a7aSWarner Losh #if !defined(LUA_NOCVTN2S) 178e3e3a7aSWarner Losh #define cvt2str(o) ttisnumber(o) 188e3e3a7aSWarner Losh #else 198e3e3a7aSWarner Losh #define cvt2str(o) 0 /* no conversion from numbers to strings */ 208e3e3a7aSWarner Losh #endif 218e3e3a7aSWarner Losh 228e3e3a7aSWarner Losh 238e3e3a7aSWarner Losh #if !defined(LUA_NOCVTS2N) 248e3e3a7aSWarner Losh #define cvt2num(o) ttisstring(o) 258e3e3a7aSWarner Losh #else 268e3e3a7aSWarner Losh #define cvt2num(o) 0 /* no conversion from strings to numbers */ 278e3e3a7aSWarner Losh #endif 288e3e3a7aSWarner Losh 298e3e3a7aSWarner Losh 308e3e3a7aSWarner Losh /* 318e3e3a7aSWarner Losh ** You can define LUA_FLOORN2I if you want to convert floats to integers 328e3e3a7aSWarner Losh ** by flooring them (instead of raising an error if they are not 338e3e3a7aSWarner Losh ** integral values) 348e3e3a7aSWarner Losh */ 358e3e3a7aSWarner Losh #if !defined(LUA_FLOORN2I) 360495ed39SKyle Evans #define LUA_FLOORN2I F2Ieq 378e3e3a7aSWarner Losh #endif 388e3e3a7aSWarner Losh 398e3e3a7aSWarner Losh 400495ed39SKyle Evans /* 410495ed39SKyle Evans ** Rounding modes for float->integer coercion 420495ed39SKyle Evans */ 430495ed39SKyle Evans typedef enum { 440495ed39SKyle Evans F2Ieq, /* no rounding; accepts only integral values */ 450495ed39SKyle Evans F2Ifloor, /* takes the floor of the number */ 460495ed39SKyle Evans F2Iceil /* takes the ceil of the number */ 470495ed39SKyle Evans } F2Imod; 480495ed39SKyle Evans 490495ed39SKyle Evans 500495ed39SKyle Evans /* convert an object to a float (including string coercion) */ 518e3e3a7aSWarner Losh #define tonumber(o,n) \ 528e3e3a7aSWarner Losh (ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n)) 538e3e3a7aSWarner Losh 540495ed39SKyle Evans 550495ed39SKyle Evans /* convert an object to a float (without string coercion) */ 560495ed39SKyle Evans #define tonumberns(o,n) \ 570495ed39SKyle Evans (ttisfloat(o) ? ((n) = fltvalue(o), 1) : \ 580495ed39SKyle Evans (ttisinteger(o) ? ((n) = cast_num(ivalue(o)), 1) : 0)) 590495ed39SKyle Evans 600495ed39SKyle Evans 610495ed39SKyle Evans /* convert an object to an integer (including string coercion) */ 628e3e3a7aSWarner Losh #define tointeger(o,i) \ 638c784bb8SWarner Losh (l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \ 648c784bb8SWarner Losh : luaV_tointeger(o,i,LUA_FLOORN2I)) 658e3e3a7aSWarner Losh 660495ed39SKyle Evans 670495ed39SKyle Evans /* convert an object to an integer (without string coercion) */ 680495ed39SKyle Evans #define tointegerns(o,i) \ 698c784bb8SWarner Losh (l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \ 708c784bb8SWarner Losh : luaV_tointegerns(o,i,LUA_FLOORN2I)) 710495ed39SKyle Evans 720495ed39SKyle Evans 738e3e3a7aSWarner Losh #define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2)) 748e3e3a7aSWarner Losh 758e3e3a7aSWarner Losh #define luaV_rawequalobj(t1,t2) luaV_equalobj(NULL,t1,t2) 768e3e3a7aSWarner Losh 778e3e3a7aSWarner Losh 788e3e3a7aSWarner Losh /* 790495ed39SKyle Evans ** fast track for 'gettable': if 't' is a table and 't[k]' is present, 800495ed39SKyle Evans ** return 1 with 'slot' pointing to 't[k]' (position of final result). 810495ed39SKyle Evans ** Otherwise, return 0 (meaning it will have to check metamethod) 820495ed39SKyle Evans ** with 'slot' pointing to an empty 't[k]' (if 't' is a table) or NULL 830495ed39SKyle Evans ** (otherwise). 'f' is the raw get function to use. 848e3e3a7aSWarner Losh */ 858e3e3a7aSWarner Losh #define luaV_fastget(L,t,k,slot,f) \ 868e3e3a7aSWarner Losh (!ttistable(t) \ 878e3e3a7aSWarner Losh ? (slot = NULL, 0) /* not a table; 'slot' is NULL and result is 0 */ \ 888e3e3a7aSWarner Losh : (slot = f(hvalue(t), k), /* else, do raw access */ \ 890495ed39SKyle Evans !isempty(slot))) /* result not empty? */ 908e3e3a7aSWarner Losh 918e3e3a7aSWarner Losh 928e3e3a7aSWarner Losh /* 930495ed39SKyle Evans ** Special case of 'luaV_fastget' for integers, inlining the fast case 940495ed39SKyle Evans ** of 'luaH_getint'. 958e3e3a7aSWarner Losh */ 960495ed39SKyle Evans #define luaV_fastgeti(L,t,k,slot) \ 978e3e3a7aSWarner Losh (!ttistable(t) \ 980495ed39SKyle Evans ? (slot = NULL, 0) /* not a table; 'slot' is NULL and result is 0 */ \ 990495ed39SKyle Evans : (slot = (l_castS2U(k) - 1u < hvalue(t)->alimit) \ 1000495ed39SKyle Evans ? &hvalue(t)->array[k - 1] : luaH_getint(hvalue(t), k), \ 1010495ed39SKyle Evans !isempty(slot))) /* result not empty? */ 1028e3e3a7aSWarner Losh 1038e3e3a7aSWarner Losh 1040495ed39SKyle Evans /* 1050495ed39SKyle Evans ** Finish a fast set operation (when fast get succeeds). In that case, 1060495ed39SKyle Evans ** 'slot' points to the place to put the value. 1070495ed39SKyle Evans */ 1080495ed39SKyle Evans #define luaV_finishfastset(L,t,slot,v) \ 1090495ed39SKyle Evans { setobj2t(L, cast(TValue *,slot), v); \ 1100495ed39SKyle Evans luaC_barrierback(L, gcvalue(t), v); } 1110495ed39SKyle Evans 1128e3e3a7aSWarner Losh 113*a9490b81SWarner Losh /* 114*a9490b81SWarner Losh ** Shift right is the same as shift left with a negative 'y' 115*a9490b81SWarner Losh */ 116*a9490b81SWarner Losh #define luaV_shiftr(x,y) luaV_shiftl(x,intop(-, 0, y)) 117*a9490b81SWarner Losh 1188e3e3a7aSWarner Losh 1198e3e3a7aSWarner Losh 1208e3e3a7aSWarner Losh LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2); 1218e3e3a7aSWarner Losh LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r); 1228e3e3a7aSWarner Losh LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r); 1238e3e3a7aSWarner Losh LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n); 1240495ed39SKyle Evans LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, F2Imod mode); 1250495ed39SKyle Evans LUAI_FUNC int luaV_tointegerns (const TValue *obj, lua_Integer *p, 1260495ed39SKyle Evans F2Imod mode); 1270495ed39SKyle Evans LUAI_FUNC int luaV_flttointeger (lua_Number n, lua_Integer *p, F2Imod mode); 1288e3e3a7aSWarner Losh LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key, 1298e3e3a7aSWarner Losh StkId val, const TValue *slot); 1308e3e3a7aSWarner Losh LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key, 1310495ed39SKyle Evans TValue *val, const TValue *slot); 1328e3e3a7aSWarner Losh LUAI_FUNC void luaV_finishOp (lua_State *L); 1330495ed39SKyle Evans LUAI_FUNC void luaV_execute (lua_State *L, CallInfo *ci); 1348e3e3a7aSWarner Losh LUAI_FUNC void luaV_concat (lua_State *L, int total); 1350495ed39SKyle Evans LUAI_FUNC lua_Integer luaV_idiv (lua_State *L, lua_Integer x, lua_Integer y); 1368e3e3a7aSWarner Losh LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y); 1370495ed39SKyle Evans LUAI_FUNC lua_Number luaV_modf (lua_State *L, lua_Number x, lua_Number y); 1388e3e3a7aSWarner Losh LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y); 1398e3e3a7aSWarner Losh LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb); 1408e3e3a7aSWarner Losh 1418e3e3a7aSWarner Losh #endif 142