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@ -93,200 +93,7 @@ struct GCObject {
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*/
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typedef union Value Value;
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#define RAVI_NAN_TAGGING 0
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#if RAVI_NAN_TAGGING
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#define RAVI_NAN_TAG 0x7ffc0000
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#define RAVI_TYPE_MASK 0x0000ffff
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/*
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TODO This is little endian - need to switch lo/hi for big
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endian
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*/
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typedef struct ravi_HiLo {
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int lo;
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int hi;
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} HiLo;
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typedef union ravi_TypeOrDouble {
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HiLo hilo;
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double n;
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/* for debugging */
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unsigned char bytes[8];
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} TypeOrDouble;
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/*
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** Tagged Values. This is the basic representation of values in Lua,
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** an actual value plus a tag with its type.
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*/
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#define TValuefields Value value_; TypeOrDouble tt_
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typedef struct lua_TValue TValue;
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/* macro defining a nil value */
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/* TODO this is for little endian, make it work for big endian */
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#define NILCONSTANT {NULL}, {0, (RAVI_NAN_TAG|LUA_TNIL)}
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/* Note that numbers are not stored in value_ when NaN tagging is ON */
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#define val_(o) ((o)->value_)
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#define numval_(o) ((o)->tt_)
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#define extracttype(o) ((o)->tt_.hilo.hi & RAVI_NAN_TAG)
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/* raw type tag of a TValue */
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#define rttype(o) (extracttype(o)==RAVI_NAN_TAG ? ((o)->tt_.hilo.hi & RAVI_TYPE_MASK) : LUA_TNUMFLT)
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/* tag with no variants (bits 0-3) */
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#define novariant(x) ((x) & 0x0F)
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/* type tag of a TValue (bits 0-3 for tags + variant bits 4-5) */
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#define ttype(o) (rttype(o) & 0x3F)
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/* type tag of a TValue with no variants (bits 0-3) */
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#define ttnov(o) (novariant(rttype(o)))
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/* Macros to test type */
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#define checktag(o,t) (rttype(o) == (t))
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#define checktype(o,t) (ttnov(o) == (t))
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#define ttisfloat(o) (extracttype(o) != RAVI_NAN_TAG)
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#define ttisinteger(o) checktag((o), LUA_TNUMINT)
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#define ttisnumber(o) (ttisfloat(o) || ttisinteger(o))
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#define ttisnil(o) checktag((o), LUA_TNIL)
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#define ttisboolean(o) checktag((o), LUA_TBOOLEAN)
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#define ttislightuserdata(o) checktag((o), LUA_TLIGHTUSERDATA)
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#define ttisstring(o) checktype((o), LUA_TSTRING)
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#define ttisshrstring(o) checktag((o), ctb(LUA_TSHRSTR))
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#define ttislngstring(o) checktag((o), ctb(LUA_TLNGSTR))
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#define ttistable(o) checktag((o), ctb(LUA_TTABLE))
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#define ttisfunction(o) checktype(o, LUA_TFUNCTION)
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#define ttisclosure(o) ((rttype(o) & 0x1F) == LUA_TFUNCTION)
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#define ttisCclosure(o) checktag((o), ctb(LUA_TCCL))
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#define ttisLclosure(o) checktag((o), ctb(LUA_TLCL))
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#define ttislcf(o) checktag((o), LUA_TLCF)
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#define ttisfulluserdata(o) checktag((o), ctb(LUA_TUSERDATA))
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#define ttisthread(o) checktag((o), ctb(LUA_TTHREAD))
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#define ttisdeadkey(o) checktag((o), LUA_TDEADKEY)
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/* Macros to access values */
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#define ivalue(o) check_exp(ttisinteger(o), val_(o).i)
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#define fltvalue(o) check_exp(ttisfloat(o), numval_(o).n)
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#define nvalue(o) check_exp(ttisnumber(o), \
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(ttisinteger(o) ? cast_num(ivalue(o)) : fltvalue(o)))
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#define gcvalue(o) check_exp(iscollectable(o), val_(o).gc)
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#define pvalue(o) check_exp(ttislightuserdata(o), val_(o).p)
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#define tsvalue(o) check_exp(ttisstring(o), gco2ts(val_(o).gc))
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#define uvalue(o) check_exp(ttisfulluserdata(o), gco2u(val_(o).gc))
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#define clvalue(o) check_exp(ttisclosure(o), gco2cl(val_(o).gc))
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#define clLvalue(o) check_exp(ttisLclosure(o), gco2lcl(val_(o).gc))
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#define clCvalue(o) check_exp(ttisCclosure(o), gco2ccl(val_(o).gc))
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#define fvalue(o) check_exp(ttislcf(o), val_(o).f)
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#define hvalue(o) check_exp(ttistable(o), gco2t(val_(o).gc))
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#define bvalue(o) check_exp(ttisboolean(o), val_(o).b)
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#define thvalue(o) check_exp(ttisthread(o), gco2th(val_(o).gc))
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/* a dead value may get the 'gc' field, but cannot access its contents */
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#define deadvalue(o) check_exp(ttisdeadkey(o), cast(void *, val_(o).gc))
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#define l_isfalse(o) (ttisnil(o) || (ttisboolean(o) && bvalue(o) == 0))
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#define iscollectable(o) (rttype(o) & BIT_ISCOLLECTABLE)
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/* Macros for internal tests */
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#define righttt(obj) (ttype(obj) == gcvalue(obj)->tt)
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#define checkliveness(g,obj) \
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lua_longassert(!iscollectable(obj) || \
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(righttt(obj) && !isdead(g,gcvalue(obj))))
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/* Macros to set values */
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#define settt_(o,t) ((o)->tt_.hilo.hi=(t|RAVI_NAN_TAG))
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#define setfltvalue(obj,x) \
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{ TValue *io=(obj); numval_(io).n=(x); }
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#define setivalue(obj,x) \
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{ TValue *io=(obj); val_(io).i=(x); settt_(io, LUA_TNUMINT); }
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#define setnilvalue(obj) settt_(obj, LUA_TNIL)
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#define setfvalue(obj,x) \
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{ TValue *io=(obj); val_(io).f=(x); settt_(io, LUA_TLCF); }
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#define setpvalue(obj,x) \
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{ TValue *io=(obj); val_(io).p=(x); settt_(io, LUA_TLIGHTUSERDATA); }
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#define setbvalue(obj,x) \
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{ TValue *io=(obj); val_(io).b=(x); settt_(io, LUA_TBOOLEAN); }
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#define setgcovalue(L,obj,x) \
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{ TValue *io = (obj); GCObject *i_g=(x); \
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val_(io).gc = i_g; settt_(io, ctb(i_g->tt)); }
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#define setsvalue(L,obj,x) \
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{ TValue *io = (obj); TString *x_ = (x); \
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val_(io).gc = obj2gco(x_); settt_(io, ctb(x_->tt)); \
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checkliveness(G(L),io); }
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#define setuvalue(L,obj,x) \
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{ TValue *io = (obj); Udata *x_ = (x); \
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val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TUSERDATA)); \
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checkliveness(G(L),io); }
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#define setthvalue(L,obj,x) \
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{ TValue *io = (obj); lua_State *x_ = (x); \
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val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TTHREAD)); \
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checkliveness(G(L),io); }
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#define setclLvalue(L,obj,x) \
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{ TValue *io = (obj); LClosure *x_ = (x); \
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val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TLCL)); \
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checkliveness(G(L),io); }
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#define setclCvalue(L,obj,x) \
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{ TValue *io = (obj); CClosure *x_ = (x); \
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val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TCCL)); \
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checkliveness(G(L),io); }
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#define sethvalue(L,obj,x) \
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{ TValue *io = (obj); Table *x_ = (x); \
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val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TTABLE)); \
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checkliveness(G(L),io); }
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#define setdeadvalue(obj) settt_(obj, LUA_TDEADKEY)
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#define setobj(L,obj1,obj2) \
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{ TValue *io1=(obj1); *io1 = *(obj2); \
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(void)L; checkliveness(G(L),io1); }
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/*
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** different types of assignments, according to destination
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*/
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/* from stack to (same) stack */
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#define setobjs2s setobj
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/* to stack (not from same stack) */
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#define setobj2s setobj
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#define setsvalue2s setsvalue
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#define sethvalue2s sethvalue
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#define setptvalue2s setptvalue
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/* from table to same table */
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#define setobjt2t setobj
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/* to table */
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#define setobj2t setobj
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/* to new object */
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#define setobj2n setobj
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#define setsvalue2n setsvalue
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#else
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/*
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** Tagged Values. This is the basic representation of values in Lua,
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** an actual value plus a tag with its type.
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@ -462,8 +269,6 @@ typedef struct lua_TValue TValue;
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#define setsvalue2n setsvalue
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#endif
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/*
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** {======================================================
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Dibyendu Majumdar
9 years ago