locale/programs/charmap.h

   1 /* Copyright (C) 1996-2018 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    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published
   7    by the Free Software Foundation; version 2 of the License, or
   8    (at your option) any later version.
   9
  10    This program 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
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _CHARMAP_H
  19 #define _CHARMAP_H
  20
  21 #include <obstack.h>
  22 #include <stdbool.h>
  23 #include <stdint.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 /* True if the encoding is not ASCII compatible.  */
  68 extern bool enc_not_ascii_compatible;
  69
  70
  71 /* Prototypes for charmap handling functions.  */
  72 extern struct charmap_t *charmap_read (const char *filename, int verbose,
  73                                        int error_not_found, int be_quiet,
  74                                        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 */