#include <stdarg.h>
#include <stddef.h>
#include <string.h>
#include "lua.h"
#include "lapi.h"
#include "lcode.h"
#include "ldebug.h"
#include "ldo.h"
#include "lfunc.h"
#include "lobject.h"
#include "lopcodes.h"
#include "lstate.h"
#include "lstring.h"
#include "ltable.h"
#include "ltm.h"
#include "lvm.h"

Include-Abhängigkeitsdiagramm für ldebug.c:

Makrodefinitionen
#define	ldebug_c

#define	LUA_CORE

#define	check(x) if (!(x)) return 0;

#define	checkjump(pt, pc) check(0 <= pc && pc < pt->sizecode)

#define	checkreg(pt, reg) check((reg) < (pt)->maxstacksize)

#define	checkopenop(pt, pc) luaG_checkopenop((pt)->code[(pc)+1])

Funktionen
static const char *	getfuncname (lua_State L, CallInfo ci, const char **name)

static int	currentpc (lua_State L, CallInfo ci)

static int	currentline (lua_State L, CallInfo ci)

LUA_API int	lua_sethook (lua_State *L, lua_Hook func, int mask, int count)

LUA_API lua_Hook	lua_gethook (lua_State *L)

LUA_API int	lua_gethookmask (lua_State *L)

LUA_API int	lua_gethookcount (lua_State *L)

LUA_API int	lua_getstack (lua_State L, int level, lua_Debug ar)

static Proto *	getluaproto (CallInfo *ci)

static const char *	findlocal (lua_State L, CallInfo ci, int n)

LUA_API const char *	lua_getlocal (lua_State L, const lua_Debug ar, int n)

LUA_API const char *	lua_setlocal (lua_State L, const lua_Debug ar, int n)

static void	funcinfo (lua_Debug ar, Closure cl)

static void	info_tailcall (lua_Debug *ar)

static void	collectvalidlines (lua_State L, Closure f)

static int	auxgetinfo (lua_State L, const char what, lua_Debug ar, Closure f, CallInfo *ci)

LUA_API int	lua_getinfo (lua_State L, const char what, lua_Debug *ar)

static int	precheck (const Proto *pt)

LUAI_FUNC int	luaG_checkopenop (Instruction i)

static int	checkArgMode (const Proto *pt, int r, enum OpArgMask mode)

static Instruction	symbexec (const Proto *pt, int lastpc, int reg)

LUAI_FUNC int	luaG_checkcode (const Proto *pt)

static const char *	kname (Proto *p, int c)

static const char *	getobjname (lua_State L, CallInfo ci, int stackpos, const char **name)

static int	isinstack (CallInfo ci, const TValue o)

LUAI_FUNC void	luaG_typeerror (lua_State L, const TValue o, const char *op)

LUAI_FUNC void	luaG_concaterror (lua_State *L, StkId p1, StkId p2)

LUAI_FUNC void	luaG_aritherror (lua_State L, const TValue p1, const TValue *p2)

LUAI_FUNC int	luaG_ordererror (lua_State L, const TValue p1, const TValue *p2)

static void	addinfo (lua_State L, const char msg)

LUAI_FUNC void	luaG_errormsg (lua_State *L)

LUAI_FUNC void	luaG_runerror (lua_State L, const char fmt,...)

Makro-Dokumentation

#define check ( x) if (!(x)) return 0;

Definiert in Zeile 268 der Datei ldebug.c.

#define checkjump	(	pt,
		pc
	)	check(0 <= pc && pc < pt->sizecode)

Definiert in Zeile 270 der Datei ldebug.c.

#define checkopenop	(	pt,
		pc
	)	luaG_checkopenop((pt)->code[(pc)+1])

Definiert in Zeile 288 der Datei ldebug.c.

#define checkreg	(	pt,
		reg
	)	check((reg) < (pt)->maxstacksize)

Definiert in Zeile 272 der Datei ldebug.c.

#define ldebug_c

Definiert in Zeile 13 der Datei ldebug.c.

#define LUA_CORE

Definiert in Zeile 14 der Datei ldebug.c.

Dokumentation der Funktionen

static void addinfo	(	lua_State *	L,
		const char *	msg
	)

static

Definiert in Zeile 607 der Datei ldebug.c.

                                                     {
   CallInfo *ci = L->ci;
   if (isLua(ci)) {  /* is Lua code? */
     char buff[LUA_IDSIZE];  /* add file:line information */
     int line = currentline(L, ci);
     luaO_chunkid(buff, getstr(getluaproto(ci)->source), LUA_IDSIZE);
     luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);
   }
 }

static int auxgetinfo	(	lua_State *	L,
		const char *	what,
		lua_Debug *	ar,
		Closure *	f,
		CallInfo *	ci
	)

static

Definiert in Zeile 193 der Datei ldebug.c.

                                               {
   int status = 1;
   if (f == NULL) {
     info_tailcall(ar);
     return status;
   }
   for (; *what; what++) {
     switch (*what) {
       case 'S': {
         funcinfo(ar, f);
         break;
       }
       case 'l': {
         ar->currentline = (ci) ? currentline(L, ci) : -1;
         break;
       }
       case 'u': {
         ar->nups = f->c.nupvalues;
         break;
       }
       case 'n': {
         ar->namewhat = (ci) ? getfuncname(L, ci, &ar->name) : NULL;
         if (ar->namewhat == NULL) {
           ar->namewhat = "";  /* not found */
           ar->name = NULL;
         }
         break;
       }
       case 'L':
       case 'f':  /* handled by lua_getinfo */
         break;
       default: status = 0;  /* invalid option */
     }
   }
   return status;
 }

static int checkArgMode	(	const Proto *	pt,
		int	r,
		enum OpArgMask	mode
	)

static

Definiert in Zeile 304 der Datei ldebug.c.

                                                                       {
   switch (mode) {
     case OpArgN: check(r == 0); break;
     case OpArgU: break;
     case OpArgR: checkreg(pt, r); break;
     case OpArgK:
       check(ISK(r) ? INDEXK(r) < pt->sizek : r < pt->maxstacksize);
       break;
   }
   return 1;
 }

static void collectvalidlines	(	lua_State *	L,
		Closure *	f
	)

static

Definiert in Zeile 177 der Datei ldebug.c.

                                                          {
   if (f == NULL || f->c.isC) {
     setnilvalue(L->top);
   }
   else {
     Table *t = luaH_new(L, 0, 0);
     int *lineinfo = f->l.p->lineinfo;
     int i;
     for (i=0; i<f->l.p->sizelineinfo; i++)
       setbvalue(luaH_setnum(L, t, lineinfo[i]), 1);
     sethvalue(L, L->top, t); 
   }
   incr_top(L);
 }

static int currentline	(	lua_State *	L,
		CallInfo *	ci
	)

static

Definiert in Zeile 44 der Datei ldebug.c.

                                                     {
   int pc = currentpc(L, ci);
   if (pc < 0)
     return -1;  /* only active lua functions have current-line information */
   else
     return getline(ci_func(ci)->l.p, pc);
 }

static int currentpc	(	lua_State *	L,
		CallInfo *	ci
	)

static

Definiert in Zeile 36 der Datei ldebug.c.

                                                   {
   if (!isLua(ci)) return -1;  /* function is not a Lua function? */
   if (ci == L->ci)
     ci->savedpc = L->savedpc;
   return pcRel(ci->savedpc, ci_func(ci)->l.p);
 }

static const char* findlocal	(	lua_State *	L,
		CallInfo *	ci,
		int	n
	)

static

Definiert in Zeile 112 der Datei ldebug.c.

                                                                  {
   const char *name;
   Proto *fp = getluaproto(ci);
   if (fp && (name = luaF_getlocalname(fp, n, currentpc(L, ci))) != NULL)
     return name;  /* is a local variable in a Lua function */
   else {
     StkId limit = (ci == L->ci) ? L->top : (ci+1)->func;
     if (limit - ci->base >= n && n > 0)  /* is 'n' inside 'ci' stack? */
       return "(*temporary)";
     else
       return NULL;
   }
 }

static void funcinfo	(	lua_Debug *	ar,
		Closure *	cl
	)

static

Definiert in Zeile 150 der Datei ldebug.c.

                                                   {
   if (cl->c.isC) {
     ar->source = "=[C]";
     ar->linedefined = -1;
     ar->lastlinedefined = -1;
     ar->what = "C";
   }
   else {
     ar->source = getstr(cl->l.p->source);
     ar->linedefined = cl->l.p->linedefined;
     ar->lastlinedefined = cl->l.p->lastlinedefined;
     ar->what = (ar->linedefined == 0) ? "main" : "Lua";
   }
   luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
 }

static const char * getfuncname	(	lua_State *	L,
		CallInfo *	ci,
		const char **	name
	)

static

Definiert in Zeile 544 der Datei ldebug.c.

                                                                                {
   Instruction i;
   if ((isLua(ci) && ci->tailcalls > 0) || !isLua(ci - 1))
     return NULL;  /* calling function is not Lua (or is unknown) */
   ci--;  /* calling function */
   i = ci_func(ci)->l.p->code[currentpc(L, ci)];
   if (GET_OPCODE(i) == OP_CALL || GET_OPCODE(i) == OP_TAILCALL ||
       GET_OPCODE(i) == OP_TFORLOOP)
     return getobjname(L, ci, GETARG_A(i), name);
   else
     return NULL;  /* no useful name can be found */
 }

static Proto* getluaproto ( CallInfo * ci)

static

Definiert in Zeile 107 der Datei ldebug.c.

                                          {
   return (isLua(ci) ? ci_func(ci)->l.p : NULL);
 }

static const char* getobjname	(	lua_State *	L,
		CallInfo *	ci,
		int	stackpos,
		const char **	name
	)

static

Definiert in Zeile 497 der Datei ldebug.c.

                                                   {
   if (isLua(ci)) {  /* a Lua function? */
     Proto *p = ci_func(ci)->l.p;
     int pc = currentpc(L, ci);
     Instruction i;
     *name = luaF_getlocalname(p, stackpos+1, pc);
     if (*name)  /* is a local? */
       return "local";
     i = symbexec(p, pc, stackpos);  /* try symbolic execution */
     lua_assert(pc != -1);
     switch (GET_OPCODE(i)) {
       case OP_GETGLOBAL: {
         int g = GETARG_Bx(i);  /* global index */
         lua_assert(ttisstring(&p->k[g]));
         *name = svalue(&p->k[g]);
         return "global";
       }
       case OP_MOVE: {
         int a = GETARG_A(i);
         int b = GETARG_B(i);  /* move from `b' to `a' */
         if (b < a)
           return getobjname(L, ci, b, name);  /* get name for `b' */
         break;
       }
       case OP_GETTABLE: {
         int k = GETARG_C(i);  /* key index */
         *name = kname(p, k);
         return "field";
       }
       case OP_GETUPVAL: {
         int u = GETARG_B(i);  /* upvalue index */
         *name = p->upvalues ? getstr(p->upvalues[u]) : "?";
         return "upvalue";
       }
       case OP_SELF: {
         int k = GETARG_C(i);  /* key index */
         *name = kname(p, k);
         return "method";
       }
       default: break;
     }
   }
   return NULL;  /* no useful name found */
 }

static void info_tailcall ( lua_Debug * ar)

static

Definiert in Zeile 167 der Datei ldebug.c.

                                           {
   ar->name = ar->namewhat = "";
   ar->what = "tail";
   ar->lastlinedefined = ar->linedefined = ar->currentline = -1;
   ar->source = "=(tail call)";
   luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
   ar->nups = 0;
 }

static int isinstack	(	CallInfo *	ci,
		const TValue *	o
	)

static

Definiert in Zeile 559 der Datei ldebug.c.

                                                      {
   StkId p;
   for (p = ci->base; p < ci->top; p++)
     if (o == p) return 1;
   return 0;
 }

static const char* kname	(	Proto *	p,
		int	c
	)

static

Definiert in Zeile 489 der Datei ldebug.c.

                                            {
   if (ISK(c) && ttisstring(&p->k[INDEXK(c)]))
     return svalue(&p->k[INDEXK(c)]);
   else
     return "?";
 }

LUA_API lua_Hook lua_gethook ( lua_State * L)

Definiert in Zeile 69 der Datei ldebug.c.

                                             {
   return L->hook;
 }

LUA_API int lua_gethookcount ( lua_State * L)

Definiert in Zeile 79 der Datei ldebug.c.

                                             {
   return L->basehookcount;
 }

LUA_API int lua_gethookmask ( lua_State * L)

Definiert in Zeile 74 der Datei ldebug.c.

                                            {
   return L->hookmask;
 }

LUA_API int lua_getinfo	(	lua_State *	L,
		const char *	what,
		lua_Debug *	ar
	)

Definiert in Zeile 232 der Datei ldebug.c.

                                                                         {
   int status;
   Closure *f = NULL;
   CallInfo *ci = NULL;
   lua_lock(L);
   if (*what == '>') {
     StkId func = L->top - 1;
     luai_apicheck(L, ttisfunction(func));
     what++;  /* skip the '>' */
     f = clvalue(func);
     L->top--;  /* pop function */
   }
   else if (ar->i_ci != 0) {  /* no tail call? */
     ci = L->base_ci + ar->i_ci;
     lua_assert(ttisfunction(ci->func));
     f = clvalue(ci->func);
   }
   status = auxgetinfo(L, what, ar, f, ci);
   if (strchr(what, 'f')) {
     if (f == NULL) setnilvalue(L->top);
     else setclvalue(L, L->top, f);
     incr_top(L);
   }
   if (strchr(what, 'L'))
     collectvalidlines(L, f);
   lua_unlock(L);
   return status;
 }

LUA_API const char* lua_getlocal	(	lua_State *	L,
		const lua_Debug *	ar,
		int	n
	)

Definiert in Zeile 127 der Datei ldebug.c.

                                                                             {
   CallInfo *ci = L->base_ci + ar->i_ci;
   const char *name = findlocal(L, ci, n);
   lua_lock(L);
   if (name)
       luaA_pushobject(L, ci->base + (n - 1));
   lua_unlock(L);
   return name;
 }

LUA_API int lua_getstack	(	lua_State *	L,
		int	level,
		lua_Debug *	ar
	)

Definiert in Zeile 84 der Datei ldebug.c.

                                                                   {
   int status;
   CallInfo *ci;
   lua_lock(L);
   for (ci = L->ci; level > 0 && ci > L->base_ci; ci--) {
     level--;
     if (f_isLua(ci))  /* Lua function? */
       level -= ci->tailcalls;  /* skip lost tail calls */
   }
   if (level == 0 && ci > L->base_ci) {  /* level found? */
     status = 1;
     ar->i_ci = cast_int(ci - L->base_ci);
   }
   else if (level < 0) {  /* level is of a lost tail call? */
     status = 1;
     ar->i_ci = 0;
   }
   else status = 0;  /* no such level */
   lua_unlock(L);
   return status;
 }

LUA_API int lua_sethook	(	lua_State *	L,
		lua_Hook	func,
		int	mask,
		int	count
	)

Definiert in Zeile 56 der Datei ldebug.c.

                                                                            {
   if (func == NULL || mask == 0) {  /* turn off hooks? */
     mask = 0;
     func = NULL;
   }
   L->hook = func;
   L->basehookcount = count;
   resethookcount(L);
   L->hookmask = cast_byte(mask);
   return 1;
 }

LUA_API const char* lua_setlocal	(	lua_State *	L,
		const lua_Debug *	ar,
		int	n
	)

Definiert in Zeile 138 der Datei ldebug.c.

                                                                             {
   CallInfo *ci = L->base_ci + ar->i_ci;
   const char *name = findlocal(L, ci, n);
   lua_lock(L);
   if (name)
       setobjs2s(L, ci->base + (n - 1), L->top - 1);
   L->top--;  /* pop value */
   lua_unlock(L);
   return name;
 }

LUAI_FUNC void luaG_aritherror	(	lua_State *	L,
		const TValue *	p1,
		const TValue *	p2
	)

Definiert in Zeile 588 der Datei ldebug.c.

                                                                                   {
   TValue temp;
   if (luaV_tonumber(p1, &temp) == NULL)
     p2 = p1;  /* first operand is wrong */
   luaG_typeerror(L, p2, "perform arithmetic on");
 }

LUAI_FUNC int luaG_checkcode ( const Proto * pt)

Definiert in Zeile 484 der Datei ldebug.c.

                                                {
   return (symbexec(pt, pt->sizecode, NO_REG) != 0);
 }

LUAI_FUNC int luaG_checkopenop ( Instruction i)

Definiert in Zeile 290 der Datei ldebug.c.

                                                {
   switch (GET_OPCODE(i)) {
     case OP_CALL:
     case OP_TAILCALL:
     case OP_RETURN:
     case OP_SETLIST: {
       check(GETARG_B(i) == 0);
       return 1;
     }
     default: return 0;  /* invalid instruction after an open call */
   }
 }

LUAI_FUNC void luaG_concaterror	(	lua_State *	L,
		StkId	p1,
		StkId	p2
	)

Definiert in Zeile 581 der Datei ldebug.c.

                                                                    {
   if (ttisstring(p1) || ttisnumber(p1)) p1 = p2;
   lua_assert(!ttisstring(p1) && !ttisnumber(p1));
   luaG_typeerror(L, p1, "concatenate");
 }

LUAI_FUNC void luaG_errormsg ( lua_State * L)

Definiert in Zeile 618 der Datei ldebug.c.

                                             {
   if (L->errfunc != 0) {  /* is there an error handling function? */
     StkId errfunc = restorestack(L, L->errfunc);
     if (!ttisfunction(errfunc)) luaD_throw(L, LUA_ERRERR);
     setobjs2s(L, L->top, L->top - 1);  /* move argument */
     setobjs2s(L, L->top - 1, errfunc);  /* push function */
     incr_top(L);
     luaD_call(L, L->top - 2, 1);  /* call it */
   }
   luaD_throw(L, LUA_ERRRUN);
 }

LUAI_FUNC int luaG_ordererror	(	lua_State *	L,
		const TValue *	p1,
		const TValue *	p2
	)

Definiert in Zeile 596 der Datei ldebug.c.

                                                                                  {
   const char *t1 = luaT_typenames[ttype(p1)];
   const char *t2 = luaT_typenames[ttype(p2)];
   if (t1[2] == t2[2])
     luaG_runerror(L, "attempt to compare two %s values", t1);
   else
     luaG_runerror(L, "attempt to compare %s with %s", t1, t2);
   return 0;
 }

LUAI_FUNC void luaG_runerror	(	lua_State *	L,
		const char *	fmt,
			...
	)

Definiert in Zeile 631 der Datei ldebug.c.

                                                                   {
   va_list argp;
   va_start(argp, fmt);
   addinfo(L, luaO_pushvfstring(L, fmt, argp));
   va_end(argp);
   luaG_errormsg(L);
 }

LUAI_FUNC void luaG_typeerror	(	lua_State *	L,
		const TValue *	o,
		const char *	op
	)

Definiert in Zeile 567 der Datei ldebug.c.

                                                                               {
   const char *name = NULL;
   const char *t = luaT_typenames[ttype(o)];
   const char *kind = (isinstack(L->ci, o)) ?
                          getobjname(L, L->ci, cast_int(o - L->base), &name) :
                          NULL;
   if (kind)
     luaG_runerror(L, "attempt to %s %s " LUA_QS " (a %s value)",
                 op, kind, name, t);
   else
     luaG_runerror(L, "attempt to %s a %s value", op, t);
 }

static int precheck ( const Proto * pt)

static

Definiert in Zeile 276 der Datei ldebug.c.

                                       {
   check(pt->maxstacksize <= MAXSTACK);
   check(pt->numparams+(pt->is_vararg & VARARG_HASARG) <= pt->maxstacksize);
   check(!(pt->is_vararg & VARARG_NEEDSARG) ||
               (pt->is_vararg & VARARG_HASARG));
   check(pt->sizeupvalues <= pt->nups);
   check(pt->sizelineinfo == pt->sizecode || pt->sizelineinfo == 0);
   check(pt->sizecode > 0 && GET_OPCODE(pt->code[pt->sizecode-1]) == OP_RETURN);
   return 1;
 }

static Instruction symbexec	(	const Proto *	pt,
		int	lastpc,
		int	reg
	)

static

Definiert in Zeile 317 der Datei ldebug.c.

                                                                    {
   int pc;
   int last;  /* stores position of last instruction that changed `reg' */
   last = pt->sizecode-1;  /* points to final return (a `neutral' instruction) */
   check(precheck(pt));
   for (pc = 0; pc < lastpc; pc++) {
     Instruction i = pt->code[pc];
     OpCode op = GET_OPCODE(i);
     int a = GETARG_A(i);
     int b = 0;
     int c = 0;
     check(op < NUM_OPCODES);
     checkreg(pt, a);
     switch (getOpMode(op)) {
       case iABC: {
         b = GETARG_B(i);
         c = GETARG_C(i);
         check(checkArgMode(pt, b, getBMode(op)));
         check(checkArgMode(pt, c, getCMode(op)));
         break;
       }
       case iABx: {
         b = GETARG_Bx(i);
         if (getBMode(op) == OpArgK) check(b < pt->sizek);
         break;
       }
       case iAsBx: {
         b = GETARG_sBx(i);
         if (getBMode(op) == OpArgR) {
           int dest = pc+1+b;
           check(0 <= dest && dest < pt->sizecode);
           if (dest > 0) {
             int j;
             /* check that it does not jump to a setlist count; this
                is tricky, because the count from a previous setlist may
                have the same value of an invalid setlist; so, we must
                go all the way back to the first of them (if any) */
             for (j = 0; j < dest; j++) {
               Instruction d = pt->code[dest-1-j];
               if (!(GET_OPCODE(d) == OP_SETLIST && GETARG_C(d) == 0)) break;
             }
             /* if 'j' is even, previous value is not a setlist (even if
                it looks like one) */
             check((j&1) == 0);
           }
         }
         break;
       }
     }
     if (testAMode(op)) {
       if (a == reg) last = pc;  /* change register `a' */
     }
     if (testTMode(op)) {
       check(pc+2 < pt->sizecode);  /* check skip */
       check(GET_OPCODE(pt->code[pc+1]) == OP_JMP);
     }
     switch (op) {
       case OP_LOADBOOL: {
         if (c == 1) {  /* does it jump? */
           check(pc+2 < pt->sizecode);  /* check its jump */
           check(GET_OPCODE(pt->code[pc+1]) != OP_SETLIST ||
                 GETARG_C(pt->code[pc+1]) != 0);
         }
         break;
       }
       case OP_LOADNIL: {
         if (a <= reg && reg <= b)
           last = pc;  /* set registers from `a' to `b' */
         break;
       }
       case OP_GETUPVAL:
       case OP_SETUPVAL: {
         check(b < pt->nups);
         break;
       }
       case OP_GETGLOBAL:
       case OP_SETGLOBAL: {
         check(ttisstring(&pt->k[b]));
         break;
       }
       case OP_SELF: {
         checkreg(pt, a+1);
         if (reg == a+1) last = pc;
         break;
       }
       case OP_CONCAT: {
         check(b < c);  /* at least two operands */
         break;
       }
       case OP_TFORLOOP: {
         check(c >= 1);  /* at least one result (control variable) */
         checkreg(pt, a+2+c);  /* space for results */
         if (reg >= a+2) last = pc;  /* affect all regs above its base */
         break;
       }
       case OP_FORLOOP:
       case OP_FORPREP:
         checkreg(pt, a+3);
         /* go through */
       case OP_JMP: {
         int dest = pc+1+b;
         /* not full check and jump is forward and do not skip `lastpc'? */
         if (reg != NO_REG && pc < dest && dest <= lastpc)
           pc += b;  /* do the jump */
         break;
       }
       case OP_CALL:
       case OP_TAILCALL: {
         if (b != 0) {
           checkreg(pt, a+b-1);
         }
         c--;  /* c = num. returns */
         if (c == LUA_MULTRET) {
           check(checkopenop(pt, pc));
         }
         else if (c != 0)
           checkreg(pt, a+c-1);
         if (reg >= a) last = pc;  /* affect all registers above base */
         break;
       }
       case OP_RETURN: {
         b--;  /* b = num. returns */
         if (b > 0) checkreg(pt, a+b-1);
         break;
       }
       case OP_SETLIST: {
         if (b > 0) checkreg(pt, a + b);
         if (c == 0) {
           pc++;
           check(pc < pt->sizecode - 1);
         }
         break;
       }
       case OP_CLOSURE: {
         int nup, j;
         check(b < pt->sizep);
         nup = pt->p[b]->nups;
         check(pc + nup < pt->sizecode);
         for (j = 1; j <= nup; j++) {
           OpCode op1 = GET_OPCODE(pt->code[pc + j]);
           check(op1 == OP_GETUPVAL || op1 == OP_MOVE);
         }
         if (reg != NO_REG)  /* tracing? */
           pc += nup;  /* do not 'execute' these pseudo-instructions */
         break;
       }
       case OP_VARARG: {
         check((pt->is_vararg & VARARG_ISVARARG) &&
              !(pt->is_vararg & VARARG_NEEDSARG));
         b--;
         if (b == LUA_MULTRET) check(checkopenop(pt, pc));
         checkreg(pt, a+b-1);
         break;
       }
       default: break;
     }
   }
   return pt->code[last];
 }

Makrodefinitionen

Funktionen

Makro-Dokumentation

Dokumentation der Funktionen