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@c Documentation of gnulib module 'c-strcasestr'.
@c Copyright (C) 2008-2014 Free Software Foundation, Inc.
@c Permission is granted to copy, distribute and/or modify this document
@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
@c Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
@c Texts. A copy of the license is included in the ``GNU Free
@c Documentation License'' file as part of this distribution.
The @code{c-strcasestr} module contains a case-insensitive string search
function operating on single-byte character strings, 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 char *c_strcasestr (const char *haystack, const char *needle);
@end smallexample
For case conversion here, only ASCII characters are considered to be
upper case or lower case.
Note: The function @code{strcasestr} from @code{<string.h>} supports only
unibyte locales; for multibyte locales, you need the function
@code{mbscasestr}.
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