57 lines
1.3 KiB
C
57 lines
1.3 KiB
C
/*
|
|
FUNCTION
|
|
<<strncasecmp_l>>---case-insensitive character string compare
|
|
|
|
INDEX
|
|
strncasecmp_l
|
|
|
|
SYNOPSIS
|
|
#include <strings.h>
|
|
int strncasecmp_l(const char *<[a]>, const char * <[b]>,
|
|
size_t <[length]>, locale_t <[locale]>);
|
|
|
|
DESCRIPTION
|
|
<<strncasecmp_l>> compares up to <[length]> characters
|
|
from the string at <[a]> to the 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 lowercase), <<strncasecmp_l>> returns a
|
|
number greater than zero. If the two strings are equivalent,
|
|
<<strncasecmp_l>> returns zero. If <<*<[a]>>> sorts
|
|
lexicographically before <<*<[b]>>>, <<strncasecmp_l>> returns a
|
|
number less than zero.
|
|
|
|
PORTABILITY
|
|
<<strncasecmp_l>> is POSIX-1.2008.
|
|
|
|
<<strncasecmp_l>> requires no supporting OS subroutines. It uses
|
|
tolower_l() from elsewhere in this library.
|
|
|
|
QUICKREF
|
|
strncasecmp_l
|
|
*/
|
|
|
|
#include <strings.h>
|
|
#include <ctype.h>
|
|
|
|
int
|
|
strncasecmp_l (const char *s1, const char *s2, size_t n,
|
|
struct __locale_t *locale)
|
|
{
|
|
int d = 0;
|
|
for ( ; n != 0; n--)
|
|
{
|
|
const int c1 = tolower_l (*s1++, locale);
|
|
const int c2 = tolower_l (*s2++, locale);
|
|
if (((d = c1 - c2) != 0) || (c2 == '\0'))
|
|
break;
|
|
}
|
|
return d;
|
|
}
|