strcasecmp.3

早期freebsd实现

.\" $Revision: 1.3 $
.\" Copyright (c) 1990 The Regents of the University of California.
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.\" This code is derived from software contributed to Berkeley by
.\" Chris Torek.
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.\"	@(#)strcasecmp.3	5.2 (Berkeley) 6/24/90
.\"
.TH STRCASECMP 3 "June 24, 1990"
.UC 7
.SH NAME
strcasecmp \- compare strings, ignoring case
.SH SYNOPSIS
.nf
.ft B
#include <string.h>

int
strcasecmp(const char *s1, const char *s2);

int
strncasecmp(const char *s1, const char *s2, size_t len);
.ft R
.fi
.SH DESCRIPTION
.B Strcasecmp
and
.B strncasecmp
compare the null-terminated strings
.I s1
and
.I s2
and return an integer greater than, equal to, or less than 0,
according as
.I s1
is lexicographically greater than, equal to, or less than
.IR 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 '\e200'
is greater than '\e0'.
.PP
.B Strncasecmp
compares at most
.I len
characters.
.SH SEE ALSO
bcmp(3), memcmp(3), strcmp(3), strcoll(3), strxfrm(3)