locale/programs/charmap.h

   1 /* Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@gnu.org>, 1996.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #ifndef _CHARMAP_H
  21 #define _CHARMAP_H
  22
  23 #include <obstack.h>
  24
  25 #include "repertoire.h"
  26 #include "simple-hash.h"
  27
  28
  29 struct width_rule
  30 {
  31   struct charseq *from;
  32   struct charseq *to;
  33   unsigned int width;
  34 };
  35
  36
  37 struct charmap_t
  38 {
  39   const char *code_set_name;
  40   const char *repertoiremap;
  41   int mb_cur_min;
  42   int mb_cur_max;
  43
  44   struct width_rule *width_rules;
  45   size_t nwidth_rules;
  46   size_t nwidth_rules_max;
  47   unsigned int width_default;
  48
  49   struct obstack mem_pool;
  50   hash_table char_table;
  51   hash_table byte_table;
  52   hash_table ucs4_table;
  53 };
  54
  55
  56 /* This is the structure used for entries in the hash table.  It represents
  57    the sequence of bytes used for the coded character.  */
  58 struct charseq
  59 {
  60   const char *name;
  61   uint32_t ucs4;
  62   int nbytes;
  63   unsigned char bytes[0];
  64 };
  65
  66
  67 /* Prototypes for charmap handling functions.  */
  68 extern struct charmap_t *charmap_read (const char *filename);
  69
  70 /* Return the value stored under the given key in the hashing table.  */
  71 extern struct charseq *charmap_find_value (const struct charmap_t *charmap,
  72                                            const char *name, size_t len);
  73
  74 /* Return symbol for given multibyte sequence.  */
  75 extern struct charseq *charmap_find_symbol (const struct charmap_t *charmap,
  76                                             const char *name, size_t len);
  77
  78 #endif /* charmap.h */