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https://https.git.savannah.gnu.org/git/gnulib.git
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Bruno Haible
e1cc6ea006
* modules/wcsncasecmp: New file. * lib/wchar.in.h (wcsncasecmp): New declaration. * lib/wcsncasecmp.c: New file. * lib/wcsncasecmp-impl.h: New file, from libutf8 with modifications. * m4/wcsncasecmp.m4: New file. * m4/wchar_h.m4 (gl_WCHAR_H): Test whether wcsncasecmp is declared. (gl_WCHAR_H_DEFAULTS): Initialize GNULIB_WCSNCASECMP, HAVE_WCSNCASECMP. * modules/wchar (Makefile.am): Substitute GNULIB_WCSNCASECMP, HAVE_WCSNCASECMP. * tests/test-wchar-c++.cc: Test the declaration of wcsncasecmp. * doc/posix-functions/wcsncasecmp.texi: Mention the new module.
37 lines
1.3 KiB
C
37 lines
1.3 KiB
C
/* Compare two wide strings ignoring case.
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Copyright (C) 1999, 2011 Free Software Foundation, Inc.
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Written by Bruno Haible <bruno@clisp.org>, 2011.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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int
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wcsncasecmp (const wchar_t *s1, const wchar_t *s2, size_t n)
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{
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for (; n > 0;)
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{
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wchar_t wc1 = towlower (*s1++);
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wchar_t wc2 = towlower (*s2++);
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if (wc1 != (wchar_t)'\0' && wc1 == wc2)
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{
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n--;
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continue;
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}
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/* Note that wc1 and wc2 each have at most 31 bits. */
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return (int)wc1 - (int)wc2;
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/* > 0 if wc1 > wc2, < 0 if wc1 < wc2,
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= 0 if wc1 and wc2 are both '\0'. */
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}
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return 0;
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}
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