/* ** $Id: lobject.h,v 2.20.1.2 2008/08/06 13:29:48 roberto Exp $ ** Type definitions for Lua objects ** See Copyright Notice in lua.h */ #ifndef lobject_h #define lobject_h #include #include "llimits.h" #include "lua.h" /* tags for values visible from Lua */ #define LAST_TAG LUA_TTHREAD #define LUA_NUMTAGS (LAST_TAG+1) #define READONLYMASK (1<<7) /* denormalised bitmask for READONLYBIT and */ #define LFSMASK (1<<6) /* LFSBIT to avoid include proliferation */ /* ** Extra tags for non-values */ #define LUA_TPROTO (LAST_TAG+1) #define LUA_TUPVAL (LAST_TAG+2) #define LUA_TDEADKEY (LAST_TAG+3) #ifdef LUA_USE_ESP /* ** force aligned access to critical fields in Flash-based structures ** wo is the offset of aligned word in bytes 0,4,8,.. ** bo is the field within the word in bits 0..31 ** ** Note that this returns a lu_int32 as returning a byte can cause the ** gcc code generator to emit an extra extui instruction. */ #define GET_BYTE_FN(name,t,wo,bo) \ static inline lu_int32 get ## name(void *o) { \ lu_int32 res; /* extract named field */ \ asm ("l32i %0, %1, " #wo "; extui %0, %0, " #bo ", 8;" : "=r"(res) : "r"(o) : );\ return res; } #else #define GET_BYTE_FN(name,t,wo,bo) \ static inline lu_byte get ## name(void *o) { return ((t *)o)->name; } #endif /* ** Union of all collectable objects */ typedef union GCObject GCObject; /* ** Common Header for all collectable objects (in macro form, to be ** included in other objects) */ #define CommonHeader GCObject *next; lu_byte tt; lu_byte marked /* ** Common header in struct form */ typedef struct GCheader { CommonHeader; } GCheader; /* ** Word aligned inline access functions for the CommonHeader tt and marked fields. ** Note that these MUST be consistent with the CommonHeader definition above. Arg ** 3 is a word offset (4 bytes in this case) and arg 4 the bit offset in the word. */ GET_BYTE_FN(tt,GCheader,4,0) GET_BYTE_FN(marked,GCheader,4,8) #if defined(LUA_PACK_VALUE) || defined(ELUA_ENDIAN_BIG) || defined(ELUA_ENDIAN_SMALL) # error "NodeMCU does not support the eLua LUA_PACK_VALUE and ELUA_ENDIAN defines" #endif /* ** Union of all Lua values */ typedef union { GCObject *gc; void *p; lua_Number n; int b; } Value; /* ** Tagged Values */ #define TValuefields Value value; int tt #define LUA_TVALUE_NIL {NULL}, LUA_TNIL #ifdef LUA_USE_ESP # pragma pack(4) #endif typedef struct lua_TValue { TValuefields; } TValue; #ifdef LUA_USE_ESP # pragma pack() #endif /* Macros to test type */ #define ttisnil(o) (ttype(o) == LUA_TNIL) #define ttisnumber(o) (ttype(o) == LUA_TNUMBER) #define ttisstring(o) (ttype(o) == LUA_TSTRING) #define ttistable(o) (ttnov(o) == LUA_TTABLE) #define ttisrwtable(o) (type(o) == LUA_TTABLE) #define ttisrotable(o) (ttype(o) & LUA_TISROTABLE) #define ttisboolean(o) (ttype(o) == LUA_TBOOLEAN) #define ttisuserdata(o) (ttype(o) == LUA_TUSERDATA) #define ttisthread(o) (ttype(o) == LUA_TTHREAD) #define ttislightuserdata(o) (ttype(o) == LUA_TLIGHTUSERDATA) #define ttislightfunction(o) (ttype(o) == LUA_TLIGHTFUNCTION) #define ttisclfunction(o) (ttype(o) == LUA_TFUNCTION) #define ttisfunction(o) (ttnov(o) == LUA_TFUNCTION) /* Macros to access values */ #define ttype(o) ((void) (o)->value, (o)->tt) #define ttnov(o) ((void) (o)->value, ((o)->tt & LUA_TMASK)) #define gcvalue(o) check_exp(iscollectable(o), (o)->value.gc) #define pvalue(o) check_exp(ttislightuserdata(o), (o)->value.p) #define fvalue(o) check_exp(ttislightfunction(o), (o)->value.p) #define nvalue(o) check_exp(ttisnumber(o), (o)->value.n) #define rawtsvalue(o) check_exp(ttisstring(o), &(o)->value.gc->ts) #define tsvalue(o) (&rawtsvalue(o)->tsv) #define rawuvalue(o) check_exp(ttisuserdata(o), &(o)->value.gc->u) #define uvalue(o) (&rawuvalue(o)->uv) #define clvalue(o) check_exp(ttisclfunction(o), &(o)->value.gc->cl) #define hvalue(o) check_exp(ttistable(o), &(o)->value.gc->h) #define bvalue(o) check_exp(ttisboolean(o), (o)->value.b) #define thvalue(o) check_exp(ttisthread(o), &(o)->value.gc->th) #define l_isfalse(o) (ttisnil(o) || (ttisboolean(o) && bvalue(o) == 0)) /* ** for internal debug only */ #define checkconsistency(obj) \ lua_assert(!iscollectable(obj) || (ttype(obj) == (obj)->value.gc->gch.tt)) #define checkliveness(g,obj) \ lua_assert(!iscollectable(obj) || \ ((ttype(obj) == (obj)->value.gc->gch.tt) && !isdead(g, (obj)->value.gc))) /* Macros to set values */ #define setnilvalue(obj) ((obj)->tt=LUA_TNIL) #define setnvalue(obj,x) \ { lua_Number i_x = (x); TValue *i_o=(obj); i_o->value.n=i_x; i_o->tt=LUA_TNUMBER; } #define setpvalue(obj,x) \ { void *i_x = (x); TValue *i_o=(obj); i_o->value.p=i_x; i_o->tt=LUA_TLIGHTUSERDATA; } #define setfvalue(obj,x) \ { void *i_x = (x); TValue *i_o=(obj); i_o->value.p=i_x; i_o->tt=LUA_TLIGHTFUNCTION; } #define setbvalue(obj,x) \ { int i_x = (x); TValue *i_o=(obj); i_o->value.b=i_x; i_o->tt=LUA_TBOOLEAN; } #define setsvalue(L,obj,x) \ { GCObject *i_x = cast(GCObject *, (x)); \ TValue *i_o=(obj); \ i_o->value.gc=i_x; i_o->tt=LUA_TSTRING; \ checkliveness(G(L),i_o); } #define setuvalue(L,obj,x) \ { GCObject *i_x = cast(GCObject *, (x)); \ TValue *i_o=(obj); \ i_o->value.gc=i_x; i_o->tt=LUA_TUSERDATA; \ checkliveness(G(L),i_o); } #define setthvalue(L,obj,x) \ { GCObject *i_x = cast(GCObject *, (x)); \ TValue *i_o=(obj); \ i_o->value.gc=i_x; i_o->tt=LUA_TTHREAD; \ checkliveness(G(L),i_o); } #define setclvalue(L,obj,x) \ { GCObject *i_x = cast(GCObject *, (x)); \ TValue *i_o=(obj); \ i_o->value.gc=i_x; i_o->tt=LUA_TFUNCTION; \ checkliveness(G(L),i_o); } #define sethvalue(L,obj,x) \ { GCObject *i_x = cast(GCObject *, (x)); \ TValue *i_o=(obj); \ i_o->value.gc=i_x; i_o->tt=gettt(x); \ checkliveness(G(L),i_o); } #define setptvalue(L,obj,x) \ { GCObject *i_x = cast(GCObject *, (x)); \ TValue *i_o=(obj); \ i_o->value.gc=i_x; i_o->tt=LUA_TPROTO; \ checkliveness(G(L),i_o); } #define setobj(L,obj1,obj2) \ { const TValue *o2=(obj2); TValue *o1=(obj1); \ o1->value = o2->value; o1->tt=o2->tt; \ checkliveness(G(L),o1); } /* ** different types of sets, according to destination */ /* from stack to (same) stack */ #define setobjs2s setobj /* to stack (not from same stack) */ #define setobj2s setobj #define setsvalue2s setsvalue #define sethvalue2s sethvalue #define setptvalue2s setptvalue /* from table to same table */ #define setobjt2t setobj /* to table */ #define setobj2t setobj /* to new object */ #define setobj2n setobj #define setsvalue2n setsvalue #define setttype(obj, stt) ((void) (obj)->value, (obj)->tt = (stt)) #define iscollectable(o) (ttype(o) >= LUA_TSTRING && ttype(o) <= LUA_TMASK) typedef TValue *StkId; /* index to stack elements */ /* ** String headers for string table */ typedef union TString { L_Umaxalign dummy; /* ensures maximum alignment for strings */ struct { CommonHeader; unsigned int hash; size_t len; } tsv; } TString; #define getstr(ts) cast(const char *, (ts) + 1) #define svalue(o) getstr(rawtsvalue(o)) typedef union Udata { L_Umaxalign dummy; /* ensures maximum alignment for `local' udata */ struct { CommonHeader; struct Table *metatable; struct Table *env; size_t len; } uv; } Udata; #ifdef LUA_CROSS_COMPILER #define isreadonly(o) (0) #else #define isreadonly(o) (getmarked(o) & READONLYMASK) #endif #define islfs(o) (getmarked(o) & LFSMASK) /* ** Function Prototypes */ typedef struct Proto { CommonHeader; TValue *k; /* constants used by the function */ Instruction *code; struct Proto **p; /* functions defined inside the function */ unsigned char *packedlineinfo; struct LocVar *locvars; /* information about local variables */ TString **upvalues; /* upvalue names */ TString *source; int sizeupvalues; int sizek; /* size of `k' */ int sizecode; int sizep; /* size of `p' */ int sizelocvars; int linedefined; int lastlinedefined; GCObject *gclist; lu_byte nups; /* number of upvalues */ lu_byte numparams; lu_byte is_vararg; lu_byte maxstacksize; } Proto; /* masks for new-style vararg */ #define VARARG_HASARG 1 #define VARARG_ISVARARG 2 #define VARARG_NEEDSARG 4 typedef struct LocVar { TString *varname; int startpc; /* first point where variable is active */ int endpc; /* first point where variable is dead */ } LocVar; /* ** Upvalues */ typedef struct UpVal { CommonHeader; TValue *v; /* points to stack or to its own value */ union { TValue value; /* the value (when closed) */ struct { /* double linked list (when open) */ struct UpVal *prev; struct UpVal *next; } l; } u; } UpVal; /* ** Closures */ #define ClosureHeader \ CommonHeader; lu_byte isC; lu_byte nupvalues; GCObject *gclist; \ struct Table *env typedef struct CClosure { ClosureHeader; lua_CFunction f; TValue upvalue[1]; } CClosure; typedef struct LClosure { ClosureHeader; struct Proto *p; UpVal *upvals[1]; } LClosure; typedef union Closure { CClosure c; LClosure l; } Closure; #define iscfunction(o) ((ttype(o) == LUA_TFUNCTION && clvalue(o)->c.isC)||(ttype(o)==LUA_TLIGHTFUNCTION)) #define isLfunction(o) (ttype(o) == LUA_TFUNCTION && !clvalue(o)->c.isC) /* ** Tables */ /* ** Common Table fields for both table versions (like CommonHeader in ** macro form, to be included in table structure definitions). ** ** Note that the sethvalue() macro works much like the setsvalue() ** macro and handles the abstracted type. the hvalue(o) macro can be ** used to access CommonTable fields and rw Table fields */ #define CommonTable CommonHeader; \ lu_byte flags; lu_byte lsizenode; struct Table *metatable typedef union TKey { struct { TValuefields; struct Node *next; /* for chaining */ } nk; TValue tvk; } TKey; #define LUA_TKEY_NIL {LUA_TVALUE_NIL, NULL} typedef struct Node { TValue i_val; TKey i_key; } Node; typedef struct Table { CommonTable; TValue *array; /* array part */ Node *node; Node *lastfree; /* any free position is before this position */ GCObject *gclist; int sizearray; /* size of `array' array */ } Table; GET_BYTE_FN(flags,Table,4,16) GET_BYTE_FN(lsizenode,Table,4,24) typedef const struct ROTable_entry { const char *key; const TValue value; } ROTable_entry; typedef struct ROTable { /* next always has the value (GCObject *)((size_t) 1); */ /* flags & 1<

lsizenode)) #define luaO_nilobject (&luaO_nilobject_) LUAI_DATA const TValue luaO_nilobject_; #define ceillog2(x) (luaO_log2((x)-1) + 1) LUAI_FUNC int luaO_log2 (unsigned int x); LUAI_FUNC int luaO_int2fb (unsigned int x); LUAI_FUNC int luaO_fb2int (int x); LUAI_FUNC int luaO_rawequalObj (const TValue *t1, const TValue *t2); LUAI_FUNC int luaO_str2d (const char *s, lua_Number *result); LUAI_FUNC const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp); LUAI_FUNC const char *luaO_pushfstring (lua_State *L, const char *fmt, ...); LUAI_FUNC void luaO_chunkid (char *out, const char *source, size_t len); #endif