/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 1999 by Sun Microsystems, Inc.
 */


#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include "common_han.h"
#include "common_utf.h"
#include "common_euc.h"
#include "uhang_uni_table.h"

static int
node_compare (const void *node1, const void *node2)
{
  return(((int)(((const hcode_table *)node1)->code) -
          (int)(((const hcode_table *)node2)->code)));
}



hcode_type
_unified_hangul_to_UCS2LE (hcode_type euc_code)
{
  hcode_table *node_ptr, node;
  hcode_type utf_code;
  int   udc_index;

  /* User Definable Area Check */
  if ((EUC_UDC_SEG1 == euc_code.byte.byte3) ||
      (EUC_UDC_SEG2 == euc_code.byte.byte3)) {
    if ((euc_code.byte.byte4 < EUC_UDC_OFFSET_START) ||
        (EUC_UDC_OFFSET_END < euc_code.byte.byte4)) {
      /* beyond the UDC area */
      utf_code.code = 0;

      return(utf_code);
    }

    udc_index = (euc_code.byte.byte3 == EUC_UDC_SEG1) ?
      0 : EUC_UDC_SEG_GAP;
    udc_index += (int)(euc_code.byte.byte4 - EUC_UDC_OFFSET_START);

    utf_code = _udcidx_to_utf(udc_index);

    if (utf_code.code == UTF_UDC_ERROR)
      utf_code.code = UTF8_NON_ID_CHAR;       /* Failed */

    return(utf_code);
  }

  node.code = euc_code.word.low;

  node_ptr = bsearch( &node,
                      uhang_uni_tbl, sizeof(uhang_uni_tbl)/sizeof(hcode_table),
                      sizeof(hcode_table), node_compare);

  if (node_ptr != NULL)         /* Success */
      utf_code = node_ptr->utf8;
  else                  /* Failed       */
      utf_code.code = UTF8_NON_ID_CHAR;
  return(utf_code);
}