/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/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 usr/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) 1996, by Sun Microsystems, Inc.
 * All rights reserved.
 */

/*
 * collate.h
 *
 *   MKS extension to ANSI/POSIX to retrieve additional locale information.
 *   Specifically collation information.
 *
 * Copyright 1989, 1993 by Mortice Kern Systems Inc.  All rights reserved.
 *
 * $Header: /rd/h/rcs/collate.h 1.16 1993/12/02 21:54:23 mark Exp $
 */
#ifndef __COLLATE_H__
#define __COLLATE_H__

#include <mks.h>
#include <limits.h>

/*
 * include prototypes of the MKS i18n routines
 */
#include <m_collat.h>

/*
 * constants and structure definitions used in MKS internal implementation
 *
 *  -- used by strxfrm(), localedef.
 */

/* string length limitations */
#define _M_COLLATE_MAX  32      /* max length of a collation string */
#define _M_COTOM_MAX    4       /* max length of one to many map */

/* forward, backward... -- or'ed into cmode */
#define _M_FORWARD_MODE  1      /* compare based on string forward */
#define _M_BACKWARD_MODE 2      /* compare based on string backward */
#define _M_POSITION_MODE 4      /* consider relative position of non-IGNOREd */

/* flags used in cord.cflag */
#define _M_NOCOLLSTR    0
#define _M_MANYTOONEF   1       /* Potential many-to-one mapping in forward */
#define _M_MANYTOONEB   2       /* Potential many-to-one mapping in backward */

/* typedef's */
typedef short   _m_weight_t;

/* collate database file header */
struct _m_cinfo {
        int             cnstr;                  /* number of collate strings */
        int             cnotom;                 /* number of one to many maps */
        int             cnweight;               /* Number of weights in cmode */
        unsigned char   cmode[COLL_WEIGHTS_MAX];/* order mode: forward... */
        struct _m_cstr  *cstr;                  /* Pointer to collating strs */
        struct _m_cord  *cord;                  /* weight tables */
        struct _m_cotom *cotom;                 /* one-to-many mapping tables */
        m_collel_t      *cindex,                /* index to range table map */
                        *range;                 /* Range table */
        m_collel_t      *equivo,                /* equiv class offsets */
                        *cequiv;                /* equiv class table */
};

/* Per character and per collating-sequence structure */
struct _m_cord {                                /* order */
        unsigned char   cflag;  /* =1, beginning of a collation string */
        _m_weight_t     cweight[COLL_WEIGHTS_MAX]; /* relative weight */
};

/*l
 * The _m_cstr structure is per many-to-one mapping (collating element from...)
 * Pointed at by _m_cinfo.cstr, indexed by (m_collel_t - M_CSETSIZE).
 * Stored both forwards and backwards to make it easy for strxfrm parsing
 * for order_start backward.
 */
struct _m_cstr {                                /* collating-element */
        char            csf[_M_COLLATE_MAX];    /* collating string forward */
        char            csb[_M_COLLATE_MAX];    /* collating string backward */
};

/*l
 * Per one-to-many mapping entry.  A cweight entry in the _cord structure
 * which is negative, will index into this table.
 * Pointed at by _m_cinfo.cotom.
 */
struct _m_cotom {                               /* one to many map */
        _m_weight_t     weight[_M_COTOM_MAX];
};

#ifdef I18N

extern struct _m_cinfo  _m_cinfo;

#endif  /* I18N */

#endif  /* __COLLATE_H_ */