diff options
Diffstat (limited to 'lib/unistr/u32-cmp.c')
-rw-r--r-- | lib/unistr/u32-cmp.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/lib/unistr/u32-cmp.c b/lib/unistr/u32-cmp.c new file mode 100644 index 0000000..a273b10 --- /dev/null +++ b/lib/unistr/u32-cmp.c @@ -0,0 +1,40 @@ +/* Compare pieces of UTF-32 strings. + Copyright (C) 1999, 2002, 2006 Free Software Foundation, Inc. + Written by Bruno Haible <bruno@clisp.org>, 2002. + + 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/>. */ + +#include <config.h> + +/* Specification. */ +#include "unistr.h" + +int +u32_cmp (const uint32_t *s1, const uint32_t *s2, size_t n) +{ + for (; n > 0;) + { + uint32_t uc1 = *s1++; + uint32_t uc2 = *s2++; + if (uc1 == uc2) + { + n--; + continue; + } + /* Note that uc1 and uc2 each have at most 31 bits. */ + return (int)uc1 - (int)uc2; + /* > 0 if uc1 > uc2, < 0 if uc1 < uc2. */ + } + return 0; +} |