Update.

[thirdparty/glibc.git] / locale / programs / charmap.h

/* Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@gnu.org>, 1996.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#ifndef _CHARMAP_H
#define _CHARMAP_H

#include <obstack.h>

#include "repertoire.h"
#include "simple-hash.h"


struct width_rule
{
  struct charseq *from;
  struct charseq *to;
  unsigned int width;
};


struct charmap_t
{
  const char *code_set_name;
  const char *repertoiremap;
  int mb_cur_min;
  int mb_cur_max;

  struct width_rule *width_rules;
  size_t nwidth_rules;
  size_t nwidth_rules_max;
  unsigned int width_default;

  struct obstack mem_pool;
  hash_table char_table;
  hash_table byte_table;
  hash_table ucs4_table;
};


/* This is the structure used for entries in the hash table.  It represents
   the sequence of bytes used for the coded character.  */
struct charseq
{
  const char *name;
  uint32_t ucs4;
  int nbytes;
  unsigned char bytes[0];
};


/* Prototypes for charmap handling functions.  */
extern struct charmap_t *charmap_read (const char *filename);

/* Return the value stored under the given key in the hashing table.  */
extern struct charseq *charmap_find_value (const struct charmap_t *charmap,
					   const char *name, size_t len);

/* Return symbol for given multibyte sequence.  */
extern struct charseq *charmap_find_symbol (const struct charmap_t *charmap,
					    const char *name, size_t len);

#endif /* charmap.h */