/****************************************************************
 *								*
 *	Copyright 2001, 2011 Fidelity Information Services, Inc	*
 *								*
 *	This source code contains the intellectual property	*
 *	of its copyright holder(s), and is made available	*
 *	under a license.  If you do not know the terms of	*
 *	the license, please stop and do not read further.	*
 *								*
 ****************************************************************/

#include "mdef.h"

#include "lv_val.h"
#include "compiler.h"
#include "opcode.h"
#include "indir_enum.h"
#include "toktyp.h"
#include "cache.h"
#include "op.h"
#include "rtnhdr.h"
#include "valid_mname.h"

GBLREF	bool			undef_inhibit;
GBLREF	symval			*curr_symval;
LITREF	mval			literal_null;

error_def(ERR_INDMAXNEST);
error_def(ERR_UNDEF);

void	op_indglvn(mval *v,mval *dst)
{
	ht_ent_mname	*tabent;
	icode_str	indir_src;
	int		rval;
	mstr		*obj, object;
	oprtype		x;
	var_tabent	targ_key;
	DCL_THREADGBL_ACCESS;

	SETUP_THREADGBL_ACCESS;
	MV_FORCE_STR(v);
	indir_src.str = v->str;
	indir_src.code = indir_glvn;
	if (NULL == (obj = cache_get(&indir_src)))
	{
		if (valid_mname(&v->str))
		{
			targ_key.var_name = v->str;
			COMPUTE_HASH_MNAME(&targ_key);
			tabent = lookup_hashtab_mname(&curr_symval->h_symtab, &targ_key);
			assert(NULL == tabent ||  NULL != tabent->value);
			if (!tabent || !LV_IS_VAL_DEFINED(tabent->value))
			{
				if (undef_inhibit)
				{
					*dst = literal_null;
					return;
				} else
					rts_error(VARLSTCNT(4) ERR_UNDEF, 2, v->str.len, v->str.addr);
			}
			*dst = ((lv_val *)tabent->value)->v;
			dst->mvtype &= ~MV_ALIASCONT;	/* Make sure alias container property does not pass */
			return;
		}
		if (TREF(ind_result_sp) >= TREF(ind_result_top))
			rts_error(VARLSTCNT(1) ERR_INDMAXNEST); /* mdbcondition_handler resets ind_result_sp */
		obj = &object;
		comp_init(&v->str);
		rval = glvn(&x);
		if (EXPR_FAIL == comp_fini(rval, obj, OC_IRETMVAL, &x, v->str.len))
			return;
		indir_src.str.addr = v->str.addr;
		cache_put(&indir_src, obj);
		/* Fall into code activation below */
	} else if (TREF(ind_result_sp) >= TREF(ind_result_top))
		rts_error(VARLSTCNT(1) ERR_INDMAXNEST); /* mdbcondition_handler resets ind_result_sp */
	*(TREF(ind_result_sp))++ = dst;
	comp_indr(obj);
	return;
}