/* FUNCTION <<wcscasecmp_l>>---case-insensitive wide character string compare INDEX wcscasecmp_l ANSI_SYNOPSIS #include <wchar.h> int wcscasecmp_l(const wchar_t *<[a]>, const wchar_t *<[b]>, locale_t <[locale]>); DESCRIPTION <<wcscasecmp_l>> compares the wide character string at <[a]> to the wide character string at <[b]> in a case-insensitive manner. if <[locale]> is LC_GLOBAL_LOCALE or not a valid locale object, the behaviour is undefined. RETURNS If <<*<[a]>>> sorts lexicographically after <<*<[b]>>> (after both are converted to uppercase), <<wcscasecmp_l>> returns a number greater than zero. If the two strings match, <<wcscasecmp_l>> returns zero. If <<*<[a]>>> sorts lexicographically before <<*<[b]>>>, <<wcscasecmp_l>> returns a number less than zero. PORTABILITY <<wcscasecmp_l>> is POSIX-1.2008 <<wcscasecmp_l>> requires no supporting OS subroutines. It uses tolower() from elsewhere in this library. QUICKREF wcscasecmp_l */ #include <wchar.h> #include <wctype.h> int wcscasecmp_l (const wchar_t *s1, const wchar_t *s2, struct __locale_t *locale) { int d = 0; for ( ; ; ) { const int c1 = towlower_l (*s1++, locale); const int c2 = towlower_l (*s2++, locale); if (((d = c1 - c2) != 0) || (c2 == '\0')) break; } return d; }