| @c Documentation of gnulib module 'c-strcasestr'. |
| |
| @c Copyright (C) 2008--2020 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-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}. |
