Mercurial > gnulib
view lib/unicase/u-suffix-context.h @ 36940:c741bc27922a
maint: update all copyright year number ranges
Run "make update-copyright". Compare to commit 1602f0a from last year.
Signed-off-by: Eric Blake <eblake@redhat.com>
author | Eric Blake <eblake@redhat.com> |
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date | Tue, 01 Jan 2013 00:50:58 +0000 |
parents | 807a2defea28 |
children | 344018b6e5d7 |
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/* Case-mapping context of suffix UTF-8/UTF-16/UTF-32 string. 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/>. */ casing_suffix_context_t FUNC1 (const UNIT *s, size_t n) { return FUNC2 (s, n, unicase_empty_suffix_context); } casing_suffix_context_t FUNC2 (const UNIT *s, size_t n, casing_suffix_context_t a_context) { casing_suffix_context_t context; /* Evaluate all three conditions in a single pass through the string S. The three variables are -1 as long as the value of the condition has not been determined. */ ucs4_t first_char_except_ignorable = (ucs4_t)(-1); int scc_MORE_ABOVE = -1; int scc_BEFORE_DOT = -1; const UNIT *s_end = s + n; while (s < s_end) { ucs4_t uc; int count = U_MBTOUC_UNSAFE (&uc, s, s_end - s); if (first_char_except_ignorable == (ucs4_t)(-1)) { if (!uc_is_case_ignorable (uc)) first_char_except_ignorable = uc; } if (scc_MORE_ABOVE < 0) { int ccc = uc_combining_class (uc); if (ccc == UC_CCC_A) scc_MORE_ABOVE = SCC_MORE_ABOVE_MASK; else if (ccc == UC_CCC_NR) scc_MORE_ABOVE = 0; } if (scc_BEFORE_DOT < 0) { if (uc == 0x0307) /* COMBINING DOT ABOVE */ scc_BEFORE_DOT = SCC_BEFORE_DOT_MASK; else { int ccc = uc_combining_class (uc); if (ccc == UC_CCC_A || ccc == UC_CCC_NR) scc_BEFORE_DOT = 0; } } if (first_char_except_ignorable != (ucs4_t)(-1) && (scc_MORE_ABOVE | scc_BEFORE_DOT) >= 0) /* All conditions have been determined. */ break; s += count; } /* For those conditions that have not been determined so far, use the value from the argument context. */ context.first_char_except_ignorable = (first_char_except_ignorable != (ucs4_t)(-1) ? first_char_except_ignorable : a_context.first_char_except_ignorable); context.bits = (scc_MORE_ABOVE >= 0 ? scc_MORE_ABOVE : a_context.bits & SCC_MORE_ABOVE_MASK) | (scc_BEFORE_DOT >= 0 ? scc_BEFORE_DOT : a_context.bits & SCC_BEFORE_DOT_MASK); return context; }