@c Documentation of gnulib module 'c-strncasecmp'.

@c Copyright (C) 2008--2026 Free Software Foundation, Inc.

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@c under the terms of the GNU Free Documentation License, Version 1.3 or
@c any later version published by the Free Software Foundation; with no
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@c copy of the license is at <https://www.gnu.org/licenses/fdl-1.3.en.html>.

@mindex c-strncasecmp
The @code{c-strncasecmp} module contains a case-insensitive string comparison
function operating on single-byte character strings, like the functions in
@code{<strings.h>}, that operate as if the locale encoding was ASCII.
(The "C" locale on many systems has the locale encoding "ASCII".)

The function is:
@smallexample
extern int c_strncasecmp (const char *s1, const char *s2, size_t n);
@end smallexample

For case conversion here, only ASCII characters are considered to be
upper case or lower case.

Note: The function @code{strncasecmp} from @code{<strings.h>}
supports only unibyte locales;
@mindex mbsncasecmp
@mindex mbspcasecmp
for multibyte locales,
you need the function @code{mbsncasecmp} or @code{mbspcasecmp}.
