usr/src/include/runetype.h

/*-
 * Copyright (c) 1993 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Paul Borman at Krystal Technologies.
 *
 * %sccs.include.redist.c%
 *
 *      @(#)runetype.h  5.1 (Berkeley) %G%
 */

#ifndef _RUNETYPE_H_
#define _RUNETYPE_H_

#include <machine/ansi.h>
#include <sys/cdefs.h>

#ifdef  _BSD_WCHAR_T_
typedef _BSD_WCHAR_T_   rune_t;
typedef _BSD_WCHAR_T_   wchar_t;
#undef  _BSD_WCHAR_T_
#endif

#define _CACHED_RUNES   (1 <<8 )        /* Must be a power of 2 */
#define _CRMASK         (~(_CACHED_RUNES - 1))

/*
 * The lower 8 bits of runetype[] contain the digit value of the rune.
 */
typedef struct {
        rune_t          min;            /* First rune of the range */
        rune_t          max;            /* Last rune (inclusive) of the range */
        rune_t          map;            /* What first maps to in maps */
        unsigned long   *types;         /* Array of types in range */
} _RuneEntry;

typedef struct {
        int             nranges;        /* Number of ranges stored */
        _RuneEntry      *ranges;        /* Pointer to the ranges */
} _RuneRange;

typedef struct {
        char            magic[8];       /* Magic saying what version we are */
        char            encoding[32];   /* ASCII name of this encoding */

        rune_t          (*sgetrune)
            __P((const char *, unsigned int, char const **));
        int             (*sputrune)
            __P((rune_t, char *, unsigned int, char **));
        rune_t          invalid_rune;

        unsigned long   runetype[_CACHED_RUNES];
        rune_t          maplower[_CACHED_RUNES];
        rune_t          mapupper[_CACHED_RUNES];

        /*
         * The following are to deal with Runes larger than _CACHED_RUNES - 1.
         * Their data is actually contiguous with this structure so as to make
         * it easier to read/write from/to disk.
         */
        _RuneRange      runetype_ext;
        _RuneRange      maplower_ext;
        _RuneRange      mapupper_ext;

        void            *variable;      /* Data which depends on the encoding */
        int             variable_len;   /* how long that data is */
} _RuneLocale;

#define _RUNE_MAGIC_1   "RuneMagi"      /* Indicates version 0 of RuneLocale */

extern _RuneLocale _DefaultRuneLocale;
extern _RuneLocale *_CurrentRuneLocale;

#endif  /* !_RUNETYPE_H_ */