/* Special casing table.
   Copyright (C) 2009-2018 Free Software Foundation, Inc.
   Written by Bruno Haible <bruno@clisp.org>, 2009.

   This program is free software: you can redistribute it and/or modify it
   under the terms of the GNU Lesser General Public License as published
   by the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

#include <stddef.h>

/* A special casing context.
   A context is negated through x -> -x.  */
enum
{
  SCC_ALWAYS             = 0,
  SCC_FINAL_SIGMA        = 1,
  SCC_AFTER_SOFT_DOTTED  = 2,
  SCC_MORE_ABOVE         = 3,
  SCC_BEFORE_DOT         = 4,
  SCC_AFTER_I            = 5
};

struct special_casing_rule
{
  /* The first two bytes are the code, in big-endian order.  The third byte
     only distinguishes different rules pertaining to the same code.  */
  /*unsigned*/ char code[3];

  /* True when this rule is not the last one for the given code.  */
  /*bool*/ unsigned int has_next : 1;

  /* Context.  */
  signed int context : 7;

  /* Language, or an empty string.  */
  char language[2];

  /* Mapping to upper case.  Between 0 and 3 characters.  Filled with 0s.  */
  unsigned short upper[3];

  /* Mapping to lower case.  Between 0 and 3 characters.  Filled with 0s.  */
  unsigned short lower[3];

  /* Mapping to title case.  Between 0 and 3 characters.  Filled with 0s.  */
  unsigned short title[3];

  /* Casefolding mapping.  Between 0 and 3 characters.  Filled with 0s.  */
  unsigned short casefold[3];
};

extern const struct special_casing_rule *
       gl_unicase_special_lookup (const char *str, size_t len);
