From cec10062d823eb05697eb956235d4ec66ee65e92 Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Wed, 2 Sep 2015 20:00:18 +0200 Subject: add memcasecmp and wmemcasecmp MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- src/wchar/wcscmp.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'src/wchar') diff --git a/src/wchar/wcscmp.c b/src/wchar/wcscmp.c index aa3cdf3..ddbd228 100644 --- a/src/wchar/wcscmp.c +++ b/src/wchar/wcscmp.c @@ -41,6 +41,30 @@ int wmemcmp(const wchar_t* a, const wchar_t* b, size_t size) } +/** + * Compare two memory segments alphabetically in a case insensitive manner. + * + * @param a A negative value is returned if this is the lesser. + * @param b A positive value is returned if this is the lesser. + * @param size The size of the segments. + * @return Zero is returned if `a` and `b` are equal, otherwise, + * see the specifications for `a` and `b`. + */ +int wmemcasecmp(const wchar_t* a, const wchar_t* b, size_t size) +{ + wchar_t c1, c2; + for (; size--; a++, b++) + if (*a != *b); + { + c1 = iswalpha(*a) ? towlower(*a) : *a; + c2 = iswalpha(*b) ? towlower(*b) : *b; + if (c1 != c2) + return c1 < c2 ? -1 : +1; + } + return 0; +} + + /** * Compare two strings alphabetically in a case sensitive manner. * -- cgit v1.2.3-70-g09d2