forked from KolibriOS/kolibrios
61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
|
/*
|
||
|
|
FUNCTION
|
||
|
|
<<strcasecmp>>---case-insensitive character string compare
|
||
|
|
|
||
|
|
INDEX
|
||
|
|
strcasecmp
|
||
|
|
|
||
|
|
ANSI_SYNOPSIS
|
||
|
|
#include <strings.h>
|
||
|
|
int strcasecmp(const char *<[a]>, const char *<[b]>);
|
||
|
|
|
||
|
|
TRAD_SYNOPSIS
|
||
|
|
#include <strings.h>
|
||
|
|
int strcasecmp(<[a]>, <[b]>)
|
||
|
|
char *<[a]>;
|
||
|
|
char *<[b]>;
|
||
|
|
|
||
|
|
DESCRIPTION
|
||
|
|
<<strcasecmp>> compares 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 lowercase), <<strcasecmp>> returns a
|
||
|
|
number greater than zero. If the two strings match,
|
||
|
|
<<strcasecmp>> returns zero. If <<*<[a]>>> sorts
|
||
|
|
lexicographically before <<*<[b]>>>, <<strcasecmp>> returns a
|
||
|
|
number less than zero.
|
||
|
|
|
||
|
|
PORTABILITY
|
||
|
|
<<strcasecmp>> is in the Berkeley Software Distribution.
|
||
|
|
|
||
|
|
<<strcasecmp>> requires no supporting OS subroutines. It uses
|
||
|
|
tolower() from elsewhere in this library.
|
||
|
|
|
||
|
|
QUICKREF
|
||
|
|
strcasecmp
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <strings.h>
|
||
|
|
#include <ctype.h>
|
||
|
|
|
||
|
|
int
|
||
|
|
_DEFUN (strcasecmp, (s1, s2),
|
||
|
|
_CONST char *s1 _AND
|
||
|
|
_CONST char *s2)
|
||
|
|
{
|
||
|
|
_CONST unsigned char *ucs1 = (_CONST unsigned char *) s1;
|
||
|
|
_CONST unsigned char *ucs2 = (_CONST unsigned char *) s2;
|
||
|
|
int d = 0;
|
||
|
|
for ( ; ; )
|
||
|
|
{
|
||
|
|
_CONST int c1 = tolower(*ucs1++);
|
||
|
|
_CONST int c2 = tolower(*ucs2++);
|
||
|
|
if (((d = c1 - c2) != 0) || (c2 == '\0'))
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
return d;
|
||
|
|
}
|