1 /* $NetBSD: lvm.h,v 1.12 2023/06/08 21:12:08 nikita Exp $ */ 2 3 /* 4 ** Id: lvm.h 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 F2Ieq 39 #endif 40 41 42 /* 43 ** Rounding modes for float->integer coercion 44 */ 45 typedef enum { 46 F2Ieq, /* no rounding; accepts only integral values */ 47 F2Ifloor, /* takes the floor of the number */ 48 F2Iceil /* takes the ceil of the number */ 49 } F2Imod; 50 51 52 /* convert an object to a float (including string coercion) */ 53 #ifndef _KERNEL 54 #define tonumber(o,n) \ 55 (ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n)) 56 #else /* _KERNEL */ 57 #define tonumber tointeger 58 #endif /* _KERNEL */ 59 60 61 /* convert an object to a float (without string coercion) */ 62 #define tonumberns(o,n) \ 63 (ttisfloat(o) ? ((n) = fltvalue(o), 1) : \ 64 (ttisinteger(o) ? ((n) = cast_num(ivalue(o)), 1) : 0)) 65 66 67 /* convert an object to an integer (including string coercion) */ 68 #define tointeger(o,i) \ 69 (l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \ 70 : luaV_tointeger(o,i,LUA_FLOORN2I)) 71 72 73 /* convert an object to an integer (without string coercion) */ 74 #define tointegerns(o,i) \ 75 (l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \ 76 : luaV_tointegerns(o,i,LUA_FLOORN2I)) 77 78 79 #define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2)) 80 81 #define luaV_rawequalobj(t1,t2) luaV_equalobj(NULL,t1,t2) 82 83 84 /* 85 ** fast track for 'gettable': if 't' is a table and 't[k]' is present, 86 ** return 1 with 'slot' pointing to 't[k]' (position of final result). 87 ** Otherwise, return 0 (meaning it will have to check metamethod) 88 ** with 'slot' pointing to an empty 't[k]' (if 't' is a table) or NULL 89 ** (otherwise). 'f' is the raw get function to use. 90 */ 91 #define luaV_fastget(L,t,k,slot,f) \ 92 (!ttistable(t) \ 93 ? (slot = NULL, 0) /* not a table; 'slot' is NULL and result is 0 */ \ 94 : (slot = f(hvalue(t), k), /* else, do raw access */ \ 95 !isempty(slot))) /* result not empty? */ 96 97 98 /* 99 ** Special case of 'luaV_fastget' for integers, inlining the fast case 100 ** of 'luaH_getint'. 101 */ 102 #define luaV_fastgeti(L,t,k,slot) \ 103 (!ttistable(t) \ 104 ? (slot = NULL, 0) /* not a table; 'slot' is NULL and result is 0 */ \ 105 : (slot = (l_castS2U(k) - 1u < hvalue(t)->alimit) \ 106 ? &hvalue(t)->array[k - 1] : luaH_getint(hvalue(t), k), \ 107 !isempty(slot))) /* result not empty? */ 108 109 110 /* 111 ** Finish a fast set operation (when fast get succeeds). In that case, 112 ** 'slot' points to the place to put the value. 113 */ 114 #define luaV_finishfastset(L,t,slot,v) \ 115 { setobj2t(L, cast(TValue *,slot), v); \ 116 luaC_barrierback(L, gcvalue(t), v); } 117 118 119 /* 120 ** Shift right is the same as shift left with a negative 'y' 121 */ 122 #define luaV_shiftr(x,y) luaV_shiftl(x,intop(-, 0, y)) 123 124 125 126 LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2); 127 LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r); 128 LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r); 129 LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n); 130 LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, F2Imod mode); 131 LUAI_FUNC int luaV_tointegerns (const TValue *obj, lua_Integer *p, 132 F2Imod mode); 133 LUAI_FUNC int luaV_flttointeger (lua_Number n, lua_Integer *p, F2Imod mode); 134 LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key, 135 StkId val, const TValue *slot); 136 LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key, 137 TValue *val, const TValue *slot); 138 LUAI_FUNC void luaV_finishOp (lua_State *L); 139 LUAI_FUNC void luaV_execute (lua_State *L, CallInfo *ci); 140 LUAI_FUNC void luaV_concat (lua_State *L, int total); 141 LUAI_FUNC lua_Integer luaV_idiv (lua_State *L, lua_Integer x, lua_Integer y); 142 LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y); 143 LUAI_FUNC lua_Number luaV_modf (lua_State *L, lua_Number x, lua_Number y); 144 LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y); 145 LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb); 146 147 #endif 148