C:\JS_KRESREAL\HBP_konverzia\lua\ldebug.c		C:\JS_LUA\lua-5.2.0\src\ldebug.c
	/*		/*
	** $Id: ldebug.c,v 2.88 2011/11/30 12:43:51 roberto Exp $		** $Id: ldebug.c,v 2.88 2011/11/30 12:43:51 roberto Exp $
	** Debug Interface		** Debug Interface
	** See Copyright Notice in lua.h		** See Copyright Notice in lua.h
	*/		*/
	#include <stdarg.h>		#include <stdarg.h>
	#include <stddef.h>		#include <stddef.h>
	#include <string.h>		#include <string.h>
	#define ldebug_c		#define ldebug_c
	#define LUA_CORE		#define LUA_CORE
	#include "lua.h"		#include "lua.h"
	#include "lapi.h"		#include "lapi.h"
	#include "lcode.h"		#include "lcode.h"
	#include "ldebug.h"		#include "ldebug.h"
	#include "ldo.h"		#include "ldo.h"
	#include "lfunc.h"		#include "lfunc.h"
	#include "lobject.h"		#include "lobject.h"
	#include "lopcodes.h"		#include "lopcodes.h"
	#include "lstate.h"		#include "lstate.h"
	#include "lstring.h"		#include "lstring.h"
	#include "ltable.h"		#include "ltable.h"
	#include "ltm.h"		#include "ltm.h"
	#include "lvm.h"		#include "lvm.h"
	static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name);		static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name);
	static int currentpc (CallInfo *ci) {		static int currentpc (CallInfo *ci) {
	lua_assert(isLua(ci));		lua_assert(isLua(ci));
	return pcRel(ci->u.l.savedpc, ci_func(ci)->p);		return pcRel(ci->u.l.savedpc, ci_func(ci)->p);
	}		}
	static int currentline (CallInfo *ci) {		static int currentline (CallInfo *ci) {
	return getfuncline(ci_func(ci)->p, currentpc(ci));		return getfuncline(ci_func(ci)->p, currentpc(ci));
	}		}
	/*		/*
	** this function can be called asynchronous (e.g. during a signal)		** this function can be called asynchronous (e.g. during a signal)
	*/		*/
	LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {		LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
	if (func == NULL || mask == 0) {  /* turn off hooks? */		if (func == NULL || mask == 0) {  /* turn off hooks? */
	mask = 0;		mask = 0;
	func = NULL;		func = NULL;
	}		}
	if (isLua(L->ci))		if (isLua(L->ci))
	L->oldpc = L->ci->u.l.savedpc;		L->oldpc = L->ci->u.l.savedpc;
	L->hook = func;		L->hook = func;
	L->basehookcount = count;		L->basehookcount = count;
	resethookcount(L);		resethookcount(L);
	L->hookmask = cast_byte(mask);		L->hookmask = cast_byte(mask);
	return 1;		return 1;
	}		}
	LUA_API lua_Hook lua_gethook (lua_State *L) {		LUA_API lua_Hook lua_gethook (lua_State *L) {
	return L->hook;		return L->hook;
	}		}
	LUA_API int lua_gethookmask (lua_State *L) {		LUA_API int lua_gethookmask (lua_State *L) {
	return L->hookmask;		return L->hookmask;
	}		}
	LUA_API int lua_gethookcount (lua_State *L) {		LUA_API int lua_gethookcount (lua_State *L) {
	return L->basehookcount;		return L->basehookcount;
	}		}
	LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) {		LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) {
	int status;		int status;
	CallInfo *ci;		CallInfo *ci;
	if (level < 0) return 0;  /* invalid (negative) level */		if (level < 0) return 0;  /* invalid (negative) level */
	lua_lock(L);		lua_lock(L);
	for (ci = L->ci; level > 0 && ci != &L->base_ci; ci = ci->previous)		for (ci = L->ci; level > 0 && ci != &L->base_ci; ci = ci->previous)
	level--;		level--;
	if (level == 0 && ci != &L->base_ci) {  /* level found? */		if (level == 0 && ci != &L->base_ci) {  /* level found? */
	status = 1;		status = 1;
	ar->i_ci = ci;		ar->i_ci = ci;
	}		}
	else status = 0;  /* no such level */		else status = 0;  /* no such level */
	lua_unlock(L);		lua_unlock(L);
	return status;		return status;
	}		}
	static const char *upvalname (Proto *p, int uv) {		static const char *upvalname (Proto *p, int uv) {
	TString *s = check_exp(uv < p->sizeupvalues, p->upvalues[uv].name);		TString *s = check_exp(uv < p->sizeupvalues, p->upvalues[uv].name);
	if (s == NULL) return "?";		if (s == NULL) return "?";
	else return getstr(s);		else return getstr(s);
	}		}
	static const char *findvararg (CallInfo *ci, int n, StkId *pos) {		static const char *findvararg (CallInfo *ci, int n, StkId *pos) {
	int nparams = clLvalue(ci->func)->p->numparams;		int nparams = clLvalue(ci->func)->p->numparams;
	if (n >= ci->u.l.base - ci->func - nparams)		if (n >= ci->u.l.base - ci->func - nparams)
	return NULL;  /* no such vararg */		return NULL;  /* no such vararg */
	else {		else {
	*pos = ci->func + nparams + n;		*pos = ci->func + nparams + n;
	return "(*vararg)";  /* generic name for any vararg */		return "(*vararg)";  /* generic name for any vararg */
	}		}
	}		}
	static const char *findlocal (lua_State *L, CallInfo *ci, int n,		static const char *findlocal (lua_State *L, CallInfo *ci, int n,
	StkId *pos) {		StkId *pos) {
	const char *name = NULL;		const char *name = NULL;
	StkId base;		StkId base;
	if (isLua(ci)) {		if (isLua(ci)) {
	if (n < 0)  /* access to vararg values? */		if (n < 0)  /* access to vararg values? */
	return findvararg(ci, -n, pos);		return findvararg(ci, -n, pos);
	else {		else {
	base = ci->u.l.base;		base = ci->u.l.base;
	name = luaF_getlocalname(ci_func(ci)->p, n, currentpc(ci));		name = luaF_getlocalname(ci_func(ci)->p, n, currentpc(ci));
	}		}
	}		}
	else		else
	base = ci->func + 1;		base = ci->func + 1;
	if (name == NULL) {  /* no 'standard' name? */		if (name == NULL) {  /* no 'standard' name? */
	StkId limit = (ci == L->ci) ? L->top : ci->next->func;		StkId limit = (ci == L->ci) ? L->top : ci->next->func;
	if (limit - base >= n && n > 0)  /* is 'n' inside 'ci' stack? */		if (limit - base >= n && n > 0)  /* is 'n' inside 'ci' stack? */
	name = "(*temporary)";  /* generic name for any valid slot */		name = "(*temporary)";  /* generic name for any valid slot */
	else		else
	return NULL;  /* no name */		return NULL;  /* no name */
	}		}
	*pos = base + (n - 1);		*pos = base + (n - 1);
	return name;		return name;
	}		}
	LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {		LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
	const char *name;		const char *name;
	lua_lock(L);		lua_lock(L);
	if (ar == NULL) {  /* information about non-active function? */		if (ar == NULL) {  /* information about non-active function? */
	if (!isLfunction(L->top - 1))  /* not a Lua function? */		if (!isLfunction(L->top - 1))  /* not a Lua function? */
	name = NULL;		name = NULL;
	else  /* consider live variables at function start (parameters) */		else  /* consider live variables at function start (parameters) */
	name = luaF_getlocalname(clLvalue(L->top - 1)->p, n, 0);		name = luaF_getlocalname(clLvalue(L->top - 1)->p, n, 0);
	}		}
	else {  /* active function; get information through 'ar' */		else {  /* active function; get information through 'ar' */
	StkId pos = 0;  /* to avoid warnings */		StkId pos = 0;  /* to avoid warnings */
	name = findlocal(L, ar->i_ci, n, &pos);		name = findlocal(L, ar->i_ci, n, &pos);
	if (name) {		if (name) {
	setobj2s(L, L->top, pos);		setobj2s(L, L->top, pos);
	api_incr_top(L);		api_incr_top(L);
	}		}
	}		}
	lua_unlock(L);		lua_unlock(L);
	return name;		return name;
	}		}
	LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {		LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {
	StkId pos = 0;  /* to avoid warnings */		StkId pos = 0;  /* to avoid warnings */
	const char *name = findlocal(L, ar->i_ci, n, &pos);		const char *name = findlocal(L, ar->i_ci, n, &pos);
	lua_lock(L);		lua_lock(L);
	if (name)		if (name)
	setobjs2s(L, pos, L->top - 1);		setobjs2s(L, pos, L->top - 1);
	L->top--;  /* pop value */		L->top--;  /* pop value */
	lua_unlock(L);		lua_unlock(L);
	return name;		return name;
	}		}
	static void funcinfo (lua_Debug *ar, Closure *cl) {		static void funcinfo (lua_Debug *ar, Closure *cl) {
	if (cl == NULL || cl->c.isC) {		if (cl == NULL || cl->c.isC) {
	ar->source = "=[C]";		ar->source = "=[C]";
	ar->linedefined = -1;		ar->linedefined = -1;
	ar->lastlinedefined = -1;		ar->lastlinedefined = -1;
	ar->what = "C";		ar->what = "C";
	}		}
	else {		else {
	Proto *p = cl->l.p;		Proto *p = cl->l.p;
	ar->source = p->source ? getstr(p->source) : "=?";		ar->source = p->source ? getstr(p->source) : "=?";
	ar->linedefined = p->linedefined;		ar->linedefined = p->linedefined;
	ar->lastlinedefined = p->lastlinedefined;		ar->lastlinedefined = p->lastlinedefined;
	ar->what = (ar->linedefined == 0) ? "main" : "Lua";		ar->what = (ar->linedefined == 0) ? "main" : "Lua";
	}		}
	luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);		luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
	}		}
	static void collectvalidlines (lua_State *L, Closure *f) {		static void collectvalidlines (lua_State *L, Closure *f) {
	if (f == NULL || f->c.isC) {		if (f == NULL || f->c.isC) {
	setnilvalue(L->top);		setnilvalue(L->top);
	incr_top(L);		incr_top(L);
	}		}
	else {		else {
	int i;		int i;
	TValue v;		TValue v;
	int *lineinfo = f->l.p->lineinfo;		int *lineinfo = f->l.p->lineinfo;
	Table *t = luaH_new(L);  /* new table to store active lines */		Table *t = luaH_new(L);  /* new table to store active lines */
	sethvalue(L, L->top, t);  /* push it on stack */		sethvalue(L, L->top, t);  /* push it on stack */
	incr_top(L);		incr_top(L);
	setbvalue(&v, 1);  /* boolean 'true' to be the value of all indices */		setbvalue(&v, 1);  /* boolean 'true' to be the value of all indices */
	for (i = 0; i < f->l.p->sizelineinfo; i++)  /* for all lines with code */		for (i = 0; i < f->l.p->sizelineinfo; i++)  /* for all lines with code */
	luaH_setint(L, t, lineinfo[i], &v);  /* table[line] = true */		luaH_setint(L, t, lineinfo[i], &v);  /* table[line] = true */
	}		}
	}		}
	static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,		static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,
	Closure *f, CallInfo *ci) {		Closure *f, CallInfo *ci) {
	int status = 1;		int status = 1;
	for (; *what; what++) {		for (; *what; what++) {
	switch (*what) {		switch (*what) {
	case 'S': {		case 'S': {
	funcinfo(ar, f);		funcinfo(ar, f);
	break;		break;
	}		}
	case 'l': {		case 'l': {
	ar->currentline = (ci && isLua(ci)) ? currentline(ci) : -1;		ar->currentline = (ci && isLua(ci)) ? currentline(ci) : -1;
	break;		break;
	}		}
	case 'u': {		case 'u': {
	ar->nups = (f == NULL) ? 0 : f->c.nupvalues;		ar->nups = (f == NULL) ? 0 : f->c.nupvalues;
	if (f == NULL || f->c.isC) {		if (f == NULL || f->c.isC) {
	ar->isvararg = 1;		ar->isvararg = 1;
	ar->nparams = 0;		ar->nparams = 0;
	}		}
	else {		else {
	ar->isvararg = f->l.p->is_vararg;		ar->isvararg = f->l.p->is_vararg;
	ar->nparams = f->l.p->numparams;		ar->nparams = f->l.p->numparams;
	}		}
	break;		break;
	}		}
	case 't': {		case 't': {
	ar->istailcall = (ci) ? ci->callstatus & CIST_TAIL : 0;		ar->istailcall = (ci) ? ci->callstatus & CIST_TAIL : 0;
	break;		break;
	}		}
	case 'n': {		case 'n': {
	/* calling function is a known Lua function? */		/* calling function is a known Lua function? */
	if (ci && !(ci->callstatus & CIST_TAIL) && isLua(ci->previous))		if (ci && !(ci->callstatus & CIST_TAIL) && isLua(ci->previous))
	ar->namewhat = getfuncname(L, ci->previous, &ar->name);		ar->namewhat = getfuncname(L, ci->previous, &ar->name);
	else		else
	ar->namewhat = NULL;		ar->namewhat = NULL;
	if (ar->namewhat == NULL) {		if (ar->namewhat == NULL) {
	ar->namewhat = "";  /* not found */		ar->namewhat = "";  /* not found */
	ar->name = NULL;		ar->name = NULL;
	}		}
	break;		break;
	}		}
	case 'L':		case 'L':
	case 'f':  /* handled by lua_getinfo */		case 'f':  /* handled by lua_getinfo */
	break;		break;
	default: status = 0;  /* invalid option */		default: status = 0;  /* invalid option */
	}		}
	}		}
	return status;		return status;
	}		}
	LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {		LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
	int status;		int status;
	Closure *cl;		Closure *cl;
	CallInfo *ci;		CallInfo *ci;
	StkId func;		StkId func;
	lua_lock(L);		lua_lock(L);
	if (*what == '>') {		if (*what == '>') {
	ci = NULL;		ci = NULL;
	func = L->top - 1;		func = L->top - 1;
	api_check(L, ttisfunction(func), "function expected");		api_check(L, ttisfunction(func), "function expected");
	what++;  /* skip the '>' */		what++;  /* skip the '>' */
	L->top--;  /* pop function */		L->top--;  /* pop function */
	}		}
	else {		else {
	ci = ar->i_ci;		ci = ar->i_ci;
	func = ci->func;		func = ci->func;
	lua_assert(ttisfunction(ci->func));		lua_assert(ttisfunction(ci->func));
	}		}
	cl = ttisclosure(func) ? clvalue(func) : NULL;		cl = ttisclosure(func) ? clvalue(func) : NULL;
	status = auxgetinfo(L, what, ar, cl, ci);		status = auxgetinfo(L, what, ar, cl, ci);
	if (strchr(what, 'f')) {		if (strchr(what, 'f')) {
	setobjs2s(L, L->top, func);		setobjs2s(L, L->top, func);
	incr_top(L);		incr_top(L);
	}		}
	if (strchr(what, 'L'))		if (strchr(what, 'L'))
	collectvalidlines(L, cl);		collectvalidlines(L, cl);
	lua_unlock(L);		lua_unlock(L);
	return status;		return status;
	}		}
	/*		/*
	** {======================================================		** {======================================================
	** Symbolic Execution		** Symbolic Execution
	** =======================================================		** =======================================================
	*/		*/
	static const char *getobjname (Proto *p, int lastpc, int reg,		static const char *getobjname (Proto *p, int lastpc, int reg,
	const char **name);		const char **name);
	/*		/*
	** find a "name" for the RK value 'c'		** find a "name" for the RK value 'c'
	*/		*/
	static void kname (Proto *p, int pc, int c, const char **name) {		static void kname (Proto *p, int pc, int c, const char **name) {
	if (ISK(c)) {  /* is 'c' a constant? */		if (ISK(c)) {  /* is 'c' a constant? */
	TValue *kvalue = &p->k[INDEXK(c)];		TValue *kvalue = &p->k[INDEXK(c)];
	if (ttisstring(kvalue)) {  /* literal constant? */		if (ttisstring(kvalue)) {  /* literal constant? */
	*name = svalue(kvalue);  /* it is its own name */		*name = svalue(kvalue);  /* it is its own name */
	return;		return;
	}		}
	/* else no reasonable name found */		/* else no reasonable name found */
	}		}
	else {  /* 'c' is a register */		else {  /* 'c' is a register */
	const char *what = getobjname(p, pc, c, name); /* search for 'c' */		const char *what = getobjname(p, pc, c, name); /* search for 'c' */
	if (what && *what == 'c') {  /* found a constant name? */		if (what && *what == 'c') {  /* found a constant name? */
	return;  /* 'name' already filled */		return;  /* 'name' already filled */
	}		}
	/* else no reasonable name found */		/* else no reasonable name found */
	}		}
	*name = "?";  /* no reasonable name found */		*name = "?";  /* no reasonable name found */
	}		}
	/*		/*
	** try to find last instruction before 'lastpc' that modified register 'reg'		** try to find last instruction before 'lastpc' that modified register 'reg'
	*/		*/
	static int findsetreg (Proto *p, int lastpc, int reg) {		static int findsetreg (Proto *p, int lastpc, int reg) {
	int pc;		int pc;
	int setreg = -1;  /* keep last instruction that changed 'reg' */		int setreg = -1;  /* keep last instruction that changed 'reg' */
	for (pc = 0; pc < lastpc; pc++) {		for (pc = 0; pc < lastpc; pc++) {
	Instruction i = p->code[pc];		Instruction i = p->code[pc];
	OpCode op = GET_OPCODE(i);		OpCode op = GET_OPCODE(i);
	int a = GETARG_A(i);		int a = GETARG_A(i);
	switch (op) {		switch (op) {
	case OP_LOADNIL: {		case OP_LOADNIL: {
	int b = GETARG_B(i);		int b = GETARG_B(i);
	if (a <= reg && reg <= a + b)  /* set registers from 'a' to 'a+b' */		if (a <= reg && reg <= a + b)  /* set registers from 'a' to 'a+b' */
	setreg = pc;		setreg = pc;
	break;		break;
	}		}
	case OP_TFORCALL: {		case OP_TFORCALL: {
	if (reg >= a + 2) setreg = pc;  /* affect all regs above its base */		if (reg >= a + 2) setreg = pc;  /* affect all regs above its base */
	break;		break;
	}		}
	case OP_CALL:		case OP_CALL:
	case OP_TAILCALL: {		case OP_TAILCALL: {
	if (reg >= a) setreg = pc;  /* affect all registers above base */		if (reg >= a) setreg = pc;  /* affect all registers above base */
	break;		break;
	}		}
	case OP_JMP: {		case OP_JMP: {
	int b = GETARG_sBx(i);		int b = GETARG_sBx(i);
	int dest = pc + 1 + b;		int dest = pc + 1 + b;
	/* jump is forward and do not skip `lastpc'? */		/* jump is forward and do not skip `lastpc'? */
	if (pc < dest && dest <= lastpc)		if (pc < dest && dest <= lastpc)
	pc += b;  /* do the jump */		pc += b;  /* do the jump */
	break;		break;
	}		}
	case OP_TEST: {		case OP_TEST: {
	if (reg == a) setreg = pc;  /* jumped code can change 'a' */		if (reg == a) setreg = pc;  /* jumped code can change 'a' */
	break;		break;
	}		}
	default:		default:
	if (testAMode(op) && reg == a)  /* any instruction that set A */		if (testAMode(op) && reg == a)  /* any instruction that set A */
	setreg = pc;		setreg = pc;
	break;		break;
	}		}
	}		}
	return setreg;		return setreg;
	}		}
	static const char *getobjname (Proto *p, int lastpc, int reg,		static const char *getobjname (Proto *p, int lastpc, int reg,
	const char **name) {		const char **name) {
	int pc;		int pc;
	*name = luaF_getlocalname(p, reg + 1, lastpc);		*name = luaF_getlocalname(p, reg + 1, lastpc);
	if (*name)  /* is a local? */		if (*name)  /* is a local? */
	return "local";		return "local";
	/* else try symbolic execution */		/* else try symbolic execution */
	pc = findsetreg(p, lastpc, reg);		pc = findsetreg(p, lastpc, reg);
	if (pc != -1) {  /* could find instruction? */		if (pc != -1) {  /* could find instruction? */
	Instruction i = p->code[pc];		Instruction i = p->code[pc];
	OpCode op = GET_OPCODE(i);		OpCode op = GET_OPCODE(i);
	switch (op) {		switch (op) {
	case OP_MOVE: {		case OP_MOVE: {
	int b = GETARG_B(i);  /* move from 'b' to 'a' */		int b = GETARG_B(i);  /* move from 'b' to 'a' */
	if (b < GETARG_A(i))		if (b < GETARG_A(i))
	return getobjname(p, pc, b, name);  /* get name for 'b' */		return getobjname(p, pc, b, name);  /* get name for 'b' */
	break;		break;
	}		}
	case OP_GETTABUP:		case OP_GETTABUP:
	case OP_GETTABLE: {		case OP_GETTABLE: {
	int k = GETARG_C(i);  /* key index */		int k = GETARG_C(i);  /* key index */
	int t = GETARG_B(i);  /* table index */		int t = GETARG_B(i);  /* table index */
	const char *vn = (op == OP_GETTABLE)  /* name of indexed variable */		const char *vn = (op == OP_GETTABLE)  /* name of indexed variable */
	? luaF_getlocalname(p, t + 1, pc)		? luaF_getlocalname(p, t + 1, pc)
	: upvalname(p, t);		: upvalname(p, t);
	kname(p, pc, k, name);		kname(p, pc, k, name);
	return (vn && strcmp(vn, LUA_ENV) == 0) ? "global" : "field";		return (vn && strcmp(vn, LUA_ENV) == 0) ? "global" : "field";
	}		}
	case OP_GETUPVAL: {		case OP_GETUPVAL: {
	*name = upvalname(p, GETARG_B(i));		*name = upvalname(p, GETARG_B(i));
	return "upvalue";		return "upvalue";
	}		}
	case OP_LOADK:		case OP_LOADK:
	case OP_LOADKX: {		case OP_LOADKX: {
	int b = (op == OP_LOADK) ? GETARG_Bx(i)		int b = (op == OP_LOADK) ? GETARG_Bx(i)
	: GETARG_Ax(p->code[pc + 1]);		: GETARG_Ax(p->code[pc + 1]);
	if (ttisstring(&p->k[b])) {		if (ttisstring(&p->k[b])) {
	*name = svalue(&p->k[b]);		*name = svalue(&p->k[b]);
	return "constant";		return "constant";
	}		}
	break;		break;
	}		}
	case OP_SELF: {		case OP_SELF: {
	int k = GETARG_C(i);  /* key index */		int k = GETARG_C(i);  /* key index */
	kname(p, pc, k, name);		kname(p, pc, k, name);
	return "method";		return "method";
	}		}
	default: break;  /* go through to return NULL */		default: break;  /* go through to return NULL */
	}		}
	}		}
	return NULL;  /* could not find reasonable name */		return NULL;  /* could not find reasonable name */
	}		}
	static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) {		static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) {
	TMS tm;		TMS tm;
	Proto *p = ci_func(ci)->p;  /* calling function */		Proto *p = ci_func(ci)->p;  /* calling function */
	int pc = currentpc(ci);  /* calling instruction index */		int pc = currentpc(ci);  /* calling instruction index */
	Instruction i = p->code[pc];  /* calling instruction */		Instruction i = p->code[pc];  /* calling instruction */
	switch (GET_OPCODE(i)) {		switch (GET_OPCODE(i)) {
	case OP_CALL:		case OP_CALL:
	case OP_TAILCALL:  /* get function name */		case OP_TAILCALL:  /* get function name */
	return getobjname(p, pc, GETARG_A(i), name);		return getobjname(p, pc, GETARG_A(i), name);
	case OP_TFORCALL: {  /* for iterator */		case OP_TFORCALL: {  /* for iterator */
	*name = "for iterator";		*name = "for iterator";
	return "for iterator";		return "for iterator";
	}		}
	/* all other instructions can call only through metamethods */		/* all other instructions can call only through metamethods */
	case OP_SELF:		case OP_SELF:
	case OP_GETTABUP:		case OP_GETTABUP:
	case OP_GETTABLE: tm = TM_INDEX; break;		case OP_GETTABLE: tm = TM_INDEX; break;
	case OP_SETTABUP:		case OP_SETTABUP:
	case OP_SETTABLE: tm = TM_NEWINDEX; break;		case OP_SETTABLE: tm = TM_NEWINDEX; break;
	case OP_EQ: tm = TM_EQ; break;		case OP_EQ: tm = TM_EQ; break;
	case OP_ADD: tm = TM_ADD; break;		case OP_ADD: tm = TM_ADD; break;
	case OP_SUB: tm = TM_SUB; break;		case OP_SUB: tm = TM_SUB; break;
	case OP_MUL: tm = TM_MUL; break;		case OP_MUL: tm = TM_MUL; break;
	case OP_DIV: tm = TM_DIV; break;		case OP_DIV: tm = TM_DIV; break;
	case OP_MOD: tm = TM_MOD; break;		case OP_MOD: tm = TM_MOD; break;
	case OP_POW: tm = TM_POW; break;		case OP_POW: tm = TM_POW; break;
	case OP_UNM: tm = TM_UNM; break;		case OP_UNM: tm = TM_UNM; break;
	#ifdef GCW_BIT
	case OP_BAND: tm = TM_BAND; break;
	case OP_BOR:  tm = TM_BOR; break;
	case OP_BXOR: tm = TM_BXOR; break;
	case OP_BLSH: tm = TM_BLSH; break;
	case OP_BRSH: tm = TM_BRSH; break;
	case OP_BNOT: tm = TM_BNOT; break;
	case OP_LAND: tm = TM_LAND; break;
	case OP_LOR:  tm = TM_LOR; break;
	case OP_LNOT: tm = TM_LNOT; break;
	#endif
	case OP_LEN: tm = TM_LEN; break;		case OP_LEN: tm = TM_LEN; break;
	case OP_LT: tm = TM_LT; break;		case OP_LT: tm = TM_LT; break;
	case OP_LE: tm = TM_LE; break;		case OP_LE: tm = TM_LE; break;
	case OP_CONCAT: tm = TM_CONCAT; break;		case OP_CONCAT: tm = TM_CONCAT; break;
	default:		default:
	return NULL;  /* else no useful name can be found */		return NULL;  /* else no useful name can be found */
	}		}
	*name = getstr(G(L)->tmname[tm]);		*name = getstr(G(L)->tmname[tm]);
	return "metamethod";		return "metamethod";
	}		}
	/* }====================================================== */		/* }====================================================== */
	/*		/*
	** only ANSI way to check whether a pointer points to an array		** only ANSI way to check whether a pointer points to an array
	** (used only for error messages, so efficiency is not a big concern)		** (used only for error messages, so efficiency is not a big concern)
	*/		*/
	static int isinstack (CallInfo *ci, const TValue *o) {		static int isinstack (CallInfo *ci, const TValue *o) {
	StkId p;		StkId p;
	for (p = ci->u.l.base; p < ci->top; p++)		for (p = ci->u.l.base; p < ci->top; p++)
	if (o == p) return 1;		if (o == p) return 1;
	return 0;		return 0;
	}		}
	static const char *getupvalname (CallInfo *ci, const TValue *o,		static const char *getupvalname (CallInfo *ci, const TValue *o,
	const char **name) {		const char **name) {
	LClosure *c = ci_func(ci);		LClosure *c = ci_func(ci);
	int i;		int i;
	for (i = 0; i < c->nupvalues; i++) {		for (i = 0; i < c->nupvalues; i++) {
	if (c->upvals[i]->v == o) {		if (c->upvals[i]->v == o) {
	*name = upvalname(c->p, i);		*name = upvalname(c->p, i);
	return "upvalue";		return "upvalue";
	}		}
	}		}
	return NULL;		return NULL;
	}		}
	l_noret luaG_typeerror (lua_State *L, const TValue *o, const char *op) {		l_noret luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
	CallInfo *ci = L->ci;		CallInfo *ci = L->ci;
	const char *name = NULL;		const char *name = NULL;
	const char *t = objtypename(o);		const char *t = objtypename(o);
	const char *kind = NULL;		const char *kind = NULL;
	if (isLua(ci)) {		if (isLua(ci)) {
	kind = getupvalname(ci, o, &name);  /* check whether 'o' is an upvalue */		kind = getupvalname(ci, o, &name);  /* check whether 'o' is an upvalue */
	if (!kind && isinstack(ci, o))  /* no? try a register */		if (!kind && isinstack(ci, o))  /* no? try a register */
	kind = getobjname(ci_func(ci)->p, currentpc(ci),		kind = getobjname(ci_func(ci)->p, currentpc(ci),
	cast_int(o - ci->u.l.base), &name);		cast_int(o - ci->u.l.base), &name);
	}		}
	if (kind)		if (kind)
	luaG_runerror(L, "attempt to %s %s " LUA_QS " (a %s value)",		luaG_runerror(L, "attempt to %s %s " LUA_QS " (a %s value)",
	op, kind, name, t);		op, kind, name, t);
	else		else
	luaG_runerror(L, "attempt to %s a %s value", op, t);		luaG_runerror(L, "attempt to %s a %s value", op, t);
	}		}
	l_noret luaG_concaterror (lua_State *L, StkId p1, StkId p2) {		l_noret luaG_concaterror (lua_State *L, StkId p1, StkId p2) {
	if (ttisstring(p1) || ttisnumber(p1)) p1 = p2;		if (ttisstring(p1) || ttisnumber(p1)) p1 = p2;
	lua_assert(!ttisstring(p1) && !ttisnumber(p2));		lua_assert(!ttisstring(p1) && !ttisnumber(p2));
	luaG_typeerror(L, p1, "concatenate");		luaG_typeerror(L, p1, "concatenate");
	}		}
	l_noret luaG_aritherror (lua_State *L, const TValue *p1, const TValue *p2) {		l_noret luaG_aritherror (lua_State *L, const TValue *p1, const TValue *p2) {
	TValue temp;		TValue temp;
	if (luaV_tonumber(p1, &temp) == NULL)		if (luaV_tonumber(p1, &temp) == NULL)
	p2 = p1;  /* first operand is wrong */		p2 = p1;  /* first operand is wrong */
	luaG_typeerror(L, p2, "perform arithmetic on");		luaG_typeerror(L, p2, "perform arithmetic on");
	}		}
	l_noret luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) {		l_noret luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) {
	const char *t1 = objtypename(p1);		const char *t1 = objtypename(p1);
	const char *t2 = objtypename(p2);		const char *t2 = objtypename(p2);
	if (t1 == t2)		if (t1 == t2)
	luaG_runerror(L, "attempt to compare two %s values", t1);		luaG_runerror(L, "attempt to compare two %s values", t1);
	else		else
	luaG_runerror(L, "attempt to compare %s with %s", t1, t2);		luaG_runerror(L, "attempt to compare %s with %s", t1, t2);
	}		}
	static void addinfo (lua_State *L, const char *msg) {		static void addinfo (lua_State *L, const char *msg) {
	CallInfo *ci = L->ci;		CallInfo *ci = L->ci;
	if (isLua(ci)) {  /* is Lua code? */		if (isLua(ci)) {  /* is Lua code? */
	char buff[LUA_IDSIZE];  /* add file:line information */		char buff[LUA_IDSIZE];  /* add file:line information */
	int line = currentline(ci);		int line = currentline(ci);
	TString *src = ci_func(ci)->p->source;		TString *src = ci_func(ci)->p->source;
	if (src)		if (src)
	luaO_chunkid(buff, getstr(src), LUA_IDSIZE);		luaO_chunkid(buff, getstr(src), LUA_IDSIZE);
	else {  /* no source available; use "?" instead */		else {  /* no source available; use "?" instead */
	buff[0] = '?'; buff[1] = '\0';		buff[0] = '?'; buff[1] = '\0';
	}		}
	luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);		luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);
	}		}
	}		}
	l_noret luaG_errormsg (lua_State *L) {		l_noret luaG_errormsg (lua_State *L) {
	if (L->errfunc != 0) {  /* is there an error handling function? */		if (L->errfunc != 0) {  /* is there an error handling function? */
	StkId errfunc = restorestack(L, L->errfunc);		StkId errfunc = restorestack(L, L->errfunc);
	if (!ttisfunction(errfunc)) luaD_throw(L, LUA_ERRERR);		if (!ttisfunction(errfunc)) luaD_throw(L, LUA_ERRERR);
	setobjs2s(L, L->top, L->top - 1);  /* move argument */		setobjs2s(L, L->top, L->top - 1);  /* move argument */
	setobjs2s(L, L->top - 1, errfunc);  /* push function */		setobjs2s(L, L->top - 1, errfunc);  /* push function */
	incr_top(L);		incr_top(L);
	luaD_call(L, L->top - 2, 1, 0);  /* call it */		luaD_call(L, L->top - 2, 1, 0);  /* call it */
	}		}
	luaD_throw(L, LUA_ERRRUN);		luaD_throw(L, LUA_ERRRUN);
	}		}
	l_noret luaG_runerror (lua_State *L, const char *fmt, ...) {		l_noret luaG_runerror (lua_State *L, const char *fmt, ...) {
	va_list argp;		va_list argp;
	va_start(argp, fmt);		va_start(argp, fmt);
	addinfo(L, luaO_pushvfstring(L, fmt, argp));		addinfo(L, luaO_pushvfstring(L, fmt, argp));
	va_end(argp);		va_end(argp);
	luaG_errormsg(L);		luaG_errormsg(L);
	}		}