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@c Documentation of gnulib module 'c-strstr'.
@c Copyright (C) 2008--2023 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, no Front-Cover Texts, and no Back-Cover Texts. A
@c copy of the license is at <https://www.gnu.org/licenses/fdl-1.3.en.html>.
The @code{c-strstr} module contains a substring 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_strstr (const char *haystack, const char *needle);
@end smallexample
Note: The function @code{strstr} from @code{<string.h>} supports only
unibyte locales; for multibyte locales, you need the function
@code{mbsstr}.
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