1  /* Copyright (C) 1996-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     This program is free software; you can redistribute it and/or modify
       5     it under the terms of the GNU General Public License as published
       6     by the Free Software Foundation; version 2 of the License, or
       7     (at your option) any later version.
       8  
       9     This program is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      12     GNU General Public License for more details.
      13  
      14     You should have received a copy of the GNU General Public License
      15     along with this program; if not, see <https://www.gnu.org/licenses/>.  */
      16  
      17  #ifndef _CHARMAP_H
      18  #define _CHARMAP_H
      19  
      20  #include <obstack.h>
      21  #include <stdbool.h>
      22  #include <stdint.h>
      23  
      24  #include "repertoire.h"
      25  #include "simple-hash.h"
      26  
      27  
      28  struct width_rule
      29  {
      30    struct charseq *from;
      31    struct charseq *to;
      32    unsigned int width;
      33  };
      34  
      35  
      36  struct charmap_t
      37  {
      38    const char *code_set_name;
      39    const char *repertoiremap;
      40    int mb_cur_min;
      41    int mb_cur_max;
      42  
      43    struct width_rule *width_rules;
      44    size_t nwidth_rules;
      45    size_t nwidth_rules_max;
      46    unsigned int width_default;
      47  
      48    struct obstack mem_pool;
      49    hash_table char_table;
      50    hash_table byte_table;
      51    hash_table ucs4_table;
      52  };
      53  
      54  
      55  /* This is the structure used for entries in the hash table.  It represents
      56     the sequence of bytes used for the coded character.  */
      57  struct charseq
      58  {
      59    const char *name;
      60    uint32_t ucs4;
      61    int nbytes;
      62    unsigned char bytes[];
      63  };
      64  
      65  
      66  /* True if the encoding is not ASCII compatible.  */
      67  extern bool enc_not_ascii_compatible;
      68  
      69  
      70  /* Prototypes for charmap handling functions.  */
      71  extern struct charmap_t *charmap_read (const char *filename, int verbose,
      72  				       int error_not_found, int be_quiet,
      73  				       int use_default);
      74  
      75  /* Return the value stored under the given key in the hashing table.  */
      76  extern struct charseq *charmap_find_value (const struct charmap_t *charmap,
      77  					   const char *name, size_t len);
      78  
      79  /* Return symbol for given multibyte sequence.  */
      80  extern struct charseq *charmap_find_symbol (const struct charmap_t *charmap,
      81  					    const char *name, size_t len);
      82  
      83  #endif /* charmap.h */