lib/unicase/special-casing.in.h

   1 /* Special casing table.
   2    Copyright (C) 2009-2019 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2009.
   4
   5    This program is free software: you can redistribute it and/or modify it
   6    under the terms of the GNU Lesser General Public License as published
   7    by the Free Software Foundation; either version 3 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 GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 #include <stddef.h>
  19
  20 /* A special casing context.
  21    A context is negated through x -> -x.  */
  22 enum
  23 {
  24   SCC_ALWAYS             = 0,
  25   SCC_FINAL_SIGMA        = 1,
  26   SCC_AFTER_SOFT_DOTTED  = 2,
  27   SCC_MORE_ABOVE         = 3,
  28   SCC_BEFORE_DOT         = 4,
  29   SCC_AFTER_I            = 5
  30 };
  31
  32 struct special_casing_rule
  33 {
  34   /* The first two bytes are the code, in big-endian order.  The third byte
  35      only distinguishes different rules pertaining to the same code.  */
  36   /*unsigned*/ char code[3];
  37
  38   /* True when this rule is not the last one for the given code.  */
  39   /*bool*/ unsigned int has_next : 1;
  40
  41   /* Context.  */
  42   signed int context : 7;
  43
  44   /* Language, or an empty string.  */
  45   char language[2];
  46
  47   /* Mapping to upper case.  Between 0 and 3 characters.  Filled with 0s.  */
  48   unsigned short upper[3];
  49
  50   /* Mapping to lower case.  Between 0 and 3 characters.  Filled with 0s.  */
  51   unsigned short lower[3];
  52
  53   /* Mapping to title case.  Between 0 and 3 characters.  Filled with 0s.  */
  54   unsigned short title[3];
  55
  56   /* Casefolding mapping.  Between 0 and 3 characters.  Filled with 0s.  */
  57   unsigned short casefold[3];
  58 };
  59
  60 extern const struct special_casing_rule *
  61        gl_unicase_special_lookup (const char *str, size_t len);