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### 5.42 `wcscasecmp`—case-insensitive wide character string compare

Synopsis

         #include <wchar.h>
         int wcscasecmp(const wchar_t *a, const wchar_t *b);

Description
`wcscasecmp` compares the wide character string at a to the wide character string at b in a case-insensitive manner.

Returns

If `*`a sorts lexicographically after `*`b (after both are converted to uppercase), `wcscasecmp` returns a number greater than zero. If the two strings match, `wcscasecmp` returns zero. If `*`a sorts lexicographically before `*`b, `wcscasecmp` returns a number less than zero.

Portability
POSIX-1.2008

`wcscasecmp` requires no supporting OS subroutines. It uses tolower() from elsewhere in this library.