0,0 → 1,63 |
/* |
FUNCTION |
<<strncasecmp>>---case-insensitive character string compare |
|
INDEX |
strncasecmp |
|
ANSI_SYNOPSIS |
#include <string.h> |
int strncasecmp(const char *<[a]>, const char * <[b]>, size_t <[length]>); |
|
TRAD_SYNOPSIS |
#include <string.h> |
int strncasecmp(<[a]>, <[b]>, <[length]>) |
char *<[a]>; |
char *<[b]>; |
size_t <[length]> |
|
DESCRIPTION |
<<strncasecmp>> compares up to <[length]> 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 lowercase), <<strncasecmp>> returns a |
number greater than zero. If the two strings are equivalent, |
<<strncasecmp>> returns zero. If <<*<[a]>>> sorts |
lexicographically before <<*<[b]>>>, <<strncasecmp>> returns a |
number less than zero. |
|
PORTABILITY |
<<strncasecmp>> is in the Berkeley Software Distribution. |
|
<<strncasecmp>> requires no supporting OS subroutines. It uses |
tolower() from elsewhere in this library. |
|
QUICKREF |
strncasecmp |
*/ |
|
#include <string.h> |
#include <ctype.h> |
|
int |
_DEFUN (strncasecmp, (s1, s2, n), |
_CONST char *s1 _AND |
_CONST char *s2 _AND |
size_t n) |
{ |
_CONST unsigned char *ucs1 = (_CONST unsigned char *) s1; |
_CONST unsigned char *ucs2 = (_CONST unsigned char *) s2; |
int d = 0; |
for ( ; n != 0; n--) |
{ |
_CONST int c1 = tolower(*ucs1++); |
_CONST int c2 = tolower(*ucs2++); |
if (((d = c1 - c2) != 0) || (c2 == '\0')) |
break; |
} |
return d; |
} |