NAME
strcasecmp,
strncasecmp —
compare strings, ignoring
case
LIBRARY
library “libc”
SYNOPSIS
#include
<strings.h>
int
strcasecmp(const
char *s1, const char
*s2);
int
strncasecmp(const
char *s1, const char
*s2, size_t
len);
DESCRIPTION
The
strcasecmp()
and strncasecmp() functions compare the
nul-terminated strings s1 and s2
and return an integer greater than, equal to, or less than 0, according to
whether s1 is lexicographically greater than, equal
to, or less than s2 after translation of each
corresponding character to lower-case. The strings themselves are not
modified. The comparison is done using unsigned characters, so that
‘\200’ is greater than
‘\0’.
The
strncasecmp()
function compares at most len characters.
SEE ALSO
STANDARDS
The strcasecmp() and
strncasecmp() functions conform to
IEEE Std 1003.1-2001 (“POSIX.1”).
HISTORY
The strcasecmp() and
strncasecmp() functions first appeared in
4.4BSD.
NOTES
If len is 0
strncasecmp() always returns 0.