/*
 * 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) 1994 by Sun Microsystems, Inc.
 */



#ifndef _UTF2NBYTE_H_
#define _UTF2NBYTE_H_


#include "hangulcode.h"

typedef struct __conv_desc {
        unsigned short          ci, v, cf;
        enum { E, CI, V, CF }   prev_state;
        enum { ASCII, WANSUNG } state;
} _conv_desc;

#define RESET_CONV_DESC()\
                        cd->ci = cd->v = cd->cf = CVC_FILL; cd->prev_state = E;
#define PROCESS_PRIOR_CVC()\
        {\
                int             i;\
                register int    j;\
                char            c[5];\
                \
                if (cd->prev_state != E)\
                {\
                        i = 0;\
                        if ((cd->ci <= 18 || cd->ci == CVC_FILL) &&\
                            (cd->v <= 20 || cd->v == CVC_FILL) &&\
                            (cd->cf <= 28 || cd->cf == CVC_FILL))\
                        {\
                                c[i] = (char)Y19_32[cd->ci != CVC_FILL ?\
                                        cd->ci + 1 : 0] + '@';\
                                if (c[i] > '@')\
                                        i++;\
                                c[i] = (char)Y21_32[cd->v != CVC_FILL ? cd->v +\
                                        (short)(cd->v + 1) / 3 + 2 : 1] + '`';\
                                if (c[i] > 'a')\
                                        echo_vowel(c, &i);\
                                c[i] = (char)Y28_32[cd->cf != CVC_FILL ?\
                                        cd->cf - 1 : 0] + '@';\
                                if (c[i] > '@')\
                                        echo_consonant(c, &i);\
                                \
                                if ((obtail - ob) < (i + (cd->state == ASCII ?\
                                                                1 : 0)))\
                                {\
                                        errno = E2BIG;\
                                        ret_val = (size_t)-1;\
                                        break;\
                                }\
                                if (cd->state == ASCII)\
                                {\
                                        *ob++ = SO;\
                                        cd->state = WANSUNG;\
                                }\
                                for (j = 0; j < i; j++)\
                                        *ob++ = c[j];\
                        }\
                        else\
                        {\
                                /* Let's assume the code is non-identical. */\
                                if (cd->state == WANSUNG)\
                                {\
                                        if ((obtail - ob) < 3)\
                                        {\
                                                errno = E2BIG;\
                                                ret_val = (size_t)-1;\
                                                break;\
                                        }\
                                        *ob++ = SI;\
                                        cd->state = ASCII;\
                                }\
                                else if ((obtail - ob) < 2)\
                                {\
                                        errno = E2BIG;\
                                        ret_val = (size_t)-1;\
                                        break;\
                                }\
                                *ob++ = NON_IDENTICAL;\
                                *ob++ = NON_IDENTICAL;\
                                ret_val += 2;\
                        }\
                        RESET_CONV_DESC();\
                }\
        }


#endif  /* _UTF2NBYTE_H_ */