locale/programs/charmap.h

   1 /* Copyright (C) 1996-1999, 2001, 2003 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 Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the 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    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #ifndef _CHARMAP_H
  21 #define _CHARMAP_H
  22
  23 #include <obstack.h>
  24 #include <stdbool.h>
  25
  26 #include "repertoire.h"
  27 #include "simple-hash.h"
  28
  29
  30 struct width_rule
  31 {
  32   struct charseq *from;
  33   struct charseq *to;
  34   unsigned int width;
  35 };
  36
  37
  38 struct charmap_t
  39 {
  40   const char *code_set_name;
  41   const char *repertoiremap;
  42   int mb_cur_min;
  43   int mb_cur_max;
  44
  45   struct width_rule *width_rules;
  46   size_t nwidth_rules;
  47   size_t nwidth_rules_max;
  48   unsigned int width_default;
  49
  50   struct obstack mem_pool;
  51   hash_table char_table;
  52   hash_table byte_table;
  53   hash_table ucs4_table;
  54 };
  55
  56
  57 /* This is the structure used for entries in the hash table.  It represents
  58    the sequence of bytes used for the coded character.  */
  59 struct charseq
  60 {
  61   const char *name;
  62   uint32_t ucs4;
  63   int nbytes;
  64   unsigned char bytes[0];
  65 };
  66
  67
  68 /* True if the encoding is not ASCII compatible.  */
  69 extern bool enc_not_ascii_compatible;
  70
  71
  72 /* Prototypes for charmap handling functions.  */
  73 extern struct charmap_t *charmap_read (const char *filename, int verbose,
  74                                        int be_quiet, int use_default);
  75
  76 /* Return the value stored under the given key in the hashing table.  */
  77 extern struct charseq *charmap_find_value (const struct charmap_t *charmap,
  78                                            const char *name, size_t len);
  79
  80 /* Return symbol for given multibyte sequence.  */
  81 extern struct charseq *charmap_find_symbol (const struct charmap_t *charmap,
  82                                             const char *name, size_t len);
  83
  84 #endif /* charmap.h */