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\" from: @(#)strcasecmp.3 8.1 (Berkeley) 6/9/93
\" $NetBSD: strcasecmp.3,v 1.21 2016/07/13 09:05:16 abhinav Exp $
\"
Dd July 11, 2016
Dt STRCASECMP 3
Os
Sh NAME
Nm strcasecmp ,
Nm strncasecmp
Nd compare strings, ignoring case
Sh LIBRARY
Lb libc
Sh SYNOPSIS
In strings.h
Ft int
Fn strcasecmp "const char *s1" "const char *s2"
Ft int
Fn strncasecmp "const char *s1" "const char *s2" "size_t len"
Sh DESCRIPTION
The
Fn strcasecmp
and
Fn strncasecmp
functions
compare the nul-terminated strings
Fa s1
and
Fa s2
and return an integer greater than, equal to, or less than 0,
according to whether
Fa s1
is lexicographically greater than, equal to, or less than
Fa 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
Sq Li \e200
is greater than
Ql \e0 .
Pp
The
Fn strncasecmp
function
compares at most
Fa len
characters.
Sh SEE ALSO
Xr bcmp 3 ,
Xr memcmp 3 ,
Xr strcmp 3 ,
Xr strcoll 3 ,
Xr strxfrm 3
Sh STANDARDS
The
Fn strcasecmp
and
Fn strncasecmp
functions conform to
St -p1003.1-2001 .
Sh HISTORY
The
Fn strcasecmp
and
Fn strncasecmp
functions first appeared in
Bx 4.4 .
Sh NOTES
If
Fa len
is 0
Fn strncasecmp
always returns 0.
