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105 lines
3.3 KiB
Groff
105 lines
3.3 KiB
Groff
.\" Copyright (c) 1990, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" Chris Torek.
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)strcasecmp.3 8.1 (Berkeley) 6/9/93
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.\"
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.TH STRCASECMP 3 "20 February 1997" GNO "Library Routines"
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.SH NAME
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.BR strcasecmp ,
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.BR strncasecmp ,
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.BR stricmp ,
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.BR strincmp
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\- compare strings, ignoring case
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.SH SYNOPSIS
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#include <string.h>
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.sp 1
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short
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\fBstricmp\fR (const char *\fIs1\fR, const char *\fIs2\fR);
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.br
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short
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\fBstrincmp\fR (const char *\fIs1\fR, const char *\fIs2\fR, unsigned \fIn\fR);
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.br
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int
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\fBstrcasecmp\fR (const char *\fIs1\fR, const char *\fIs2\fR);
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.br
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int
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\fBstrncasecmp\fR (const char *\fIs1\fR, const char *\fIs2\fR, size_t \fIlen\fR);
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.SH DESCRIPTION
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The
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.BR strcasecmp
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and
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.BR strncasecmp
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functions
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compare the null-terminated strings
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.I s1
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and
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.I s2
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and return an integer greater than, equal to, or less than 0,
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according as
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.I s1
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is lexicographically greater than, equal to, or less than
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.I s2
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after translation of each corresponding character to lower-case.
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The strings themselves are not modified.
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The comparison is done using unsigned characters, so that
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.BR \e200
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is greater than
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.BR \e0 .
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.LP
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The
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.BR strncasecmp
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compares at most
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.I len
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characters.
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.LP
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.BR stricmp
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and
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.BR strincmp
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are functionally identically equal to, and implemented in terms of,
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.BR strcasecmp
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and
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.BR strncasecmp ,
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respectively.
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.SH SEE ALSO
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.BR bcmp (3),
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.BR memcmp (3),
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.BR strcmp (3),
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.BR strcoll (3),
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.BR strxfrm (3)
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.SH HISTORY
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The
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.BR strcasecmp
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and
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.BR strncasecmp
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functions first appeared in 4.4BSD.
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