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64695e60df
* lib/locale.in.h (_gl_log2_lc_mask): Renamed from gl_log2_lc_mask. (_gl_log2_lcmask_to_index): Renamed from gl_log2_lcmask_to_index. (_gl_index_to_log2_lcmask): Renamed from gl_index_to_log2_lcmask. * lib/duplocale.c: Update. * lib/freelocale.c: Update. * lib/newlocale.c: Update. * lib/getlocalename_l-unsafe.c: Update. * lib/is_l-impl.h: Update. * lib/to_l-impl.h: Update. * lib/strcasecmp_l.c: Update. * lib/strncasecmp_l.c: Update. * lib/strerror_l.c: Update.
80 lines
2.4 KiB
C
80 lines
2.4 KiB
C
/* Case-insensitive string comparison function for unibyte locales.
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Copyright (C) 1998-2026 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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/* Specification. */
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#include <strings.h>
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#include <ctype.h>
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#include <limits.h>
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#include <string.h>
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#include "c-strcase.h"
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int
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strncasecmp_l (const char *s1, const char *s2, size_t n, locale_t locale)
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{
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#if GNULIB_defined_locale_t
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struct gl_locale_category_t *plc =
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&locale->category[_gl_log2_lcmask_to_index (_gl_log2_lc_mask (LC_CTYPE))];
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if (plc->is_c_locale)
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/* Implementation for the "C" locale. */
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return c_strncasecmp (s1, s2, n);
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# if HAVE_WINDOWS_LOCALE_T
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/* Documentation:
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<https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/strnicmp-wcsnicmp-mbsnicmp-strnicmp-l-wcsnicmp-l-mbsnicmp-l> */
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return _strnicmp_l (s1, s2, n, plc->system_locale);
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# else
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/* Implementation for the global locale. */
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{
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# if HAVE_WORKING_USELOCALE
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locale_t saved_locale = uselocale (LC_GLOBAL_LOCALE);
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# endif
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int ret = strncasecmp (s1, s2, n);
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# if HAVE_WORKING_USELOCALE
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uselocale (saved_locale);
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# endif
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return ret;
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}
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# endif
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#else
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if (s1 == s2 || n == 0)
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return 0;
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for (;; s1++, s2++)
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{
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unsigned char c1 = tolower_l ((unsigned char) *s1, locale);
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unsigned char c2 = tolower_l ((unsigned char) *s2, locale);
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if (--n == 0 || c1 == '\0' || c1 != c2)
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{
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if (UCHAR_MAX <= INT_MAX)
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return c1 - c2;
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else
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/* On machines where 'char' and 'int' are types of the same size,
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the difference of two 'unsigned char' values - including the
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sign bit - doesn't fit in an 'int'. */
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return _GL_CMP (c1, c2);
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}
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}
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#endif
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}
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