1/* 2** $Id: lvm.h,v 2.41.1.1 2017/04/19 17:20:42 roberto Exp $ 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 0 37#endif 38 39 40#define tonumber(o,n) \ 41 (ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n)) 42 43#define tointeger(o,i) \ 44 (ttisinteger(o) ? (*(i) = ivalue(o), 1) : luaV_tointeger(o,i,LUA_FLOORN2I)) 45 46#define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2)) 47 48#define luaV_rawequalobj(t1,t2) luaV_equalobj(NULL,t1,t2) 49 50 51/* 52** fast track for 'gettable': if 't' is a table and 't[k]' is not nil, 53** return 1 with 'slot' pointing to 't[k]' (final result). Otherwise, 54** return 0 (meaning it will have to check metamethod) with 'slot' 55** pointing to a nil 't[k]' (if 't' is a table) or NULL (otherwise). 56** 'f' is the raw get function to use. 57*/ 58#define luaV_fastget(L,t,k,slot,f) \ 59 (!ttistable(t) \ 60 ? (slot = NULL, 0) /* not a table; 'slot' is NULL and result is 0 */ \ 61 : (slot = f(hvalue(t), k), /* else, do raw access */ \ 62 !ttisnil(slot))) /* result not nil? */ 63 64/* 65** standard implementation for 'gettable' 66*/ 67#define luaV_gettable(L,t,k,v) { const TValue *slot; \ 68 if (luaV_fastget(L,t,k,slot,luaH_get)) { setobj2s(L, v, slot); } \ 69 else luaV_finishget(L,t,k,v,slot); } 70 71 72/* 73** Fast track for set table. If 't' is a table and 't[k]' is not nil, 74** call GC barrier, do a raw 't[k]=v', and return true; otherwise, 75** return false with 'slot' equal to NULL (if 't' is not a table) or 76** 'nil'. (This is needed by 'luaV_finishget'.) Note that, if the macro 77** returns true, there is no need to 'invalidateTMcache', because the 78** call is not creating a new entry. 79*/ 80#define luaV_fastset(L,t,k,slot,f,v) \ 81 (!ttistable(t) \ 82 ? (slot = NULL, 0) \ 83 : (slot = f(hvalue(t), k), \ 84 ttisnil(slot) ? 0 \ 85 : (luaC_barrierback(L, hvalue(t), v), \ 86 setobj2t(L, cast(TValue *,slot), v), \ 87 1))) 88 89 90#define luaV_settable(L,t,k,v) { const TValue *slot; \ 91 if (!luaV_fastset(L,t,k,slot,luaH_get,v)) \ 92 luaV_finishset(L,t,k,v,slot); } 93 94 95 96LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2); 97LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r); 98LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r); 99LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n); 100LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, int mode); 101LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key, 102 StkId val, const TValue *slot); 103LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key, 104 StkId val, const TValue *slot); 105LUAI_FUNC void luaV_finishOp (lua_State *L); 106LUAI_FUNC void luaV_execute (lua_State *L); 107LUAI_FUNC void luaV_concat (lua_State *L, int total); 108LUAI_FUNC lua_Integer luaV_div (lua_State *L, lua_Integer x, lua_Integer y); 109LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y); 110LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y); 111LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb); 112 113#endif 114