115 lines
3.7 KiB
C
115 lines
3.7 KiB
C
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/*
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** $Id: lvm.h,v 2.39 2015/09/09 13:44:07 roberto Exp $
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** Lua virtual machine
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** See Copyright Notice in lua.h
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*/
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#ifndef lvm_h
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#define lvm_h
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#include "ldo.h"
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#include "lobject.h"
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#include "ltm.h"
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#if !defined(LUA_NOCVTN2S)
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#define cvt2str(o) ttisnumber(o)
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#else
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#define cvt2str(o) 0 /* no conversion from numbers to strings */
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#endif
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#if !defined(LUA_NOCVTS2N)
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#define cvt2num(o) ttisstring(o)
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#else
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#define cvt2num(o) 0 /* no conversion from strings to numbers */
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#endif
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/*
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** You can define LUA_FLOORN2I if you want to convert floats to integers
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** by flooring them (instead of raising an error if they are not
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** integral values)
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*/
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#if !defined(LUA_FLOORN2I)
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#define LUA_FLOORN2I 0
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#endif
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#define tonumber(o,n) \
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(ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n))
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#define tointeger(o,i) \
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(ttisinteger(o) ? (*(i) = ivalue(o), 1) : luaV_tointeger(o,i,LUA_FLOORN2I))
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#define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2))
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#define luaV_rawequalobj(t1,t2) luaV_equalobj(NULL,t1,t2)
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/*
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** fast track for 'gettable': 1 means 'aux' points to resulted value;
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** 0 means 'aux' is metamethod (if 't' is a table) or NULL. 'f' is
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** the raw get function to use.
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*/
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#define luaV_fastget(L,t,k,aux,f) \
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(!ttistable(t) \
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? (aux = NULL, 0) /* not a table; 'aux' is NULL and result is 0 */ \
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: (aux = f(hvalue(t), k), /* else, do raw access */ \
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!ttisnil(aux) ? 1 /* result not nil? 'aux' has it */ \
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: (aux = fasttm(L, hvalue(t)->metatable, TM_INDEX), /* get metamethod */\
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aux != NULL ? 0 /* has metamethod? must call it */ \
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: (aux = luaO_nilobject, 1)))) /* else, final result is nil */
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/*
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** standard implementation for 'gettable'
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*/
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#define luaV_gettable(L,t,k,v) { const TValue *aux; \
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if (luaV_fastget(L,t,k,aux,luaH_get)) { setobj2s(L, v, aux); } \
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else luaV_finishget(L,t,k,v,aux); }
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/*
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** Fast track for set table. If 't' is a table and 't[k]' is not nil,
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** call GC barrier, do a raw 't[k]=v', and return true; otherwise,
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** return false with 'slot' equal to NULL (if 't' is not a table) or
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** 'nil'. (This is needed by 'luaV_finishget'.) Note that, if the macro
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** returns true, there is no need to 'invalidateTMcache', because the
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** call is not creating a new entry.
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*/
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#define luaV_fastset(L,t,k,slot,f,v) \
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(!ttistable(t) \
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? (slot = NULL, 0) \
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: (slot = f(hvalue(t), k), \
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ttisnil(slot) ? 0 \
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: (luaC_barrierback(L, hvalue(t), v), \
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setobj2t(L, cast(TValue *,slot), v), \
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1)))
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#define luaV_settable(L,t,k,v) { const TValue *slot; \
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if (!luaV_fastset(L,t,k,slot,luaH_get,v)) \
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luaV_finishset(L,t,k,v,slot); }
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LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2);
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LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r);
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LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r);
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LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n);
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LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, int mode);
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LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key,
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StkId val, const TValue *tm);
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LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key,
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StkId val, const TValue *oldval);
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LUAI_FUNC void luaV_finishOp (lua_State *L);
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LUAI_FUNC void luaV_execute (lua_State *L);
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LUAI_FUNC void luaV_concat (lua_State *L, int total);
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LUAI_FUNC lua_Integer luaV_div (lua_State *L, lua_Integer x, lua_Integer y);
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LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y);
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LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y);
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LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb);
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#endif
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