forked from KolibriOS/kolibrios
65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
/*
|
|
FUNCTION
|
|
<<wcsncasecmp>>---case-insensitive wide character string compare
|
|
|
|
INDEX
|
|
wcsncasecmp
|
|
|
|
ANSI_SYNOPSIS
|
|
#include <wchar.h>
|
|
int wcsncasecmp(const wchar_t *<[a]>, const wchar_t * <[b]>, size_t <[length]>);
|
|
|
|
TRAD_SYNOPSIS
|
|
#include <wchar.h>
|
|
int wcsncasecmp(<[a]>, <[b]>, <[length]>)
|
|
wchar_t *<[a]>;
|
|
wchar_t *<[b]>;
|
|
size_t <[length]>
|
|
|
|
DESCRIPTION
|
|
<<wcsncasecmp>> compares up to <[length]> wide characters
|
|
from the string at <[a]> to the string at <[b]> in a
|
|
case-insensitive manner.
|
|
|
|
RETURNS
|
|
|
|
If <<*<[a]>>> sorts lexicographically after <<*<[b]>>> (after
|
|
both are converted to uppercase), <<wcsncasecmp>> returns a
|
|
number greater than zero. If the two strings are equivalent,
|
|
<<wcsncasecmp>> returns zero. If <<*<[a]>>> sorts
|
|
lexicographically before <<*<[b]>>>, <<wcsncasecmp>> returns a
|
|
number less than zero.
|
|
|
|
PORTABILITY
|
|
POSIX-1.2008
|
|
|
|
<<wcsncasecmp>> requires no supporting OS subroutines. It uses
|
|
tolower() from elsewhere in this library.
|
|
|
|
QUICKREF
|
|
wcsncasecmp
|
|
*/
|
|
|
|
#include <wchar.h>
|
|
#include <wctype.h>
|
|
|
|
int
|
|
_DEFUN (wcsncasecmp, (s1, s2, n),
|
|
_CONST wchar_t *s1 _AND
|
|
_CONST wchar_t *s2 _AND
|
|
size_t n)
|
|
{
|
|
if (n == 0)
|
|
return 0;
|
|
|
|
while (n-- != 0 && towlower(*s1) == towlower(*s2))
|
|
{
|
|
if (n == 0 || *s1 == '\0' || *s2 == '\0')
|
|
break;
|
|
s1++;
|
|
s2++;
|
|
}
|
|
|
|
return towlower(*s1) - towlower(*s2);
|
|
}
|