view lib/unicase/context.h @ 17363:5a51fb7777a9

sys_select, sys_time: port 2013-01-30 Solaris 2.6 fix to Cygwin Problem reported by Marco Atzeri in <http://lists.gnu.org/archive/html/bug-gnulib/2013-03/msg00000.html>. * lib/sys_select.in.h [HAVE_SYS_SELECT_H && _CYGWIN_SYS_TIME_H]: Simply delegate to the system <sys/select.h> in this case too. Also, pay attention to _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H only if OSF/1, since otherwise Cygwin breaks, and it doesn't seem to be needed on Solaris either. * lib/sys_time.in.h [_CYGWIN_SYS_TIME_H]: Simply delgate to the system <sys/time.h> in this case.
author Paul Eggert <eggert@cs.ucla.edu>
date Tue, 19 Mar 2013 09:08:47 -0700
parents e542fd46ad6f
children 344018b6e5d7
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/* Case-mapping contexts of UTF-8/UTF-16/UTF-32 substring.
   Copyright (C) 2009-2013 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 <http://www.gnu.org/licenses/>.  */


/* The context of a prefix string combines the information of the "Before C"
   conditions of the Unicode Standard,
   <http://www.unicode.org/versions/Unicode5.0.0/ch03.pdf>, section 3.13,
   table 3-14 "Context Specification for Casing".

   casing_prefix_context_t contains the following fields:

     // Helper for evaluating the FINAL_SIGMA condition:
     //  Last character that was not case-ignorable.
     ucs4_t last_char_except_ignorable;

     // Helper for evaluating the AFTER_SOFT_DOTTED and AFTER_I conditions:
     // Last character that was of combining class 230 ("Above") or 0.
     ucs4_t last_char_normal_or_above;

   Three bits would be sufficient to carry the context information, but
   that would require to invoke uc_is_cased and uc_is_property_soft_dotted
   ahead of time, more often than actually needed.  */


/* The context of a suffix string combines the information of the "After C"
   conditions of the Unicode Standard,
   <http://www.unicode.org/versions/Unicode5.0.0/ch03.pdf>, section 3.13,
   table 3-14 "Context Specification for Casing".

   casing_suffix_context_t contains the following fields:

     // For evaluating the FINAL_SIGMA condition:
     //  First character that was not case-ignorable.
     ucs4_t first_char_except_ignorable;

     // For evaluating the MORE_ABOVE condition:
     // Bit 0 is set if the suffix contains a character of combining class
     // 230 (Above) with no character of combining class 0 or 230 (Above)
     // before it.
     //
     // For evaluating the BEFORE_DOT condition:
     // Bit 1 is set if the suffix contains a COMBINING DOT ABOVE (U+0307)
     // with no character of combining class 0 or 230 (Above) before it.
     //
     uint32_t bits;

   Three bits would be sufficient to carry the context information, but
   that would require to invoke uc_is_cased ahead of time, more often than
   actually needed.  */
#define SCC_MORE_ABOVE_MASK  1
#define SCC_BEFORE_DOT_MASK  2