'\" te
.\"  Copyright 1989 AT&T Copyright (c) 1999, Sun Microsystems, Inc.  All Rights Reserved
.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
.\" When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE.  If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
.TH STRFIND 3GEN "March 10, 2023"
.SH NAME
strfind, strrspn, strtrns, str \- string manipulations
.SH SYNOPSIS
.nf
cc [ \fIflag\fR ... ] \fIfile\fR ... \fB-lgen\fR [ \fIlibrary\fR ... ]
#include <libgen.h>

\fBint\fR \fBstrfind\fR(\fBconst char *\fR\fIas1\fR, \fBconst char *\fR\fIas2\fR);
.fi

.LP
.nf
\fBchar *\fR\fBstrrspn\fR(\fBconst char *\fR\fIstring\fR, \fBconst char *\fR\fItc\fR);
.fi

.LP
.nf
\fBchar *\fR\fBstrtrns\fR(\fBconst char *\fR\fIstring\fR, \fBconst char *\fR\fIold\fR, \fBconst char *\fR\fInew\fR,
     \fBchar *\fR\fIresult\fR);
.fi

.SH DESCRIPTION
The \fBstrfind()\fR function returns the offset of the first occurrence of the
second string,  \fIas2\fR, if it is a substring of string \fIas1\fR. If the
second string is not a substring of the first string \fBstrfind()\fR returns
\fB\(mi1\fR\&.
.sp
.LP
The \fBstrrspn()\fR function trims characters from a string. It searches from
the end of \fIstring\fR for the first character that is not contained in
\fItc\fR. If such a character is found, \fBstrrspn()\fR returns a pointer to
the next character; otherwise, it returns a pointer to \fIstring\fR.
.sp
.LP
The \fBstrtrns()\fR function transforms  \fIstring\fR and copies it into
\fIresult\fR. Any character  that appears in  \fIold\fR is replaced with the
character in the same position in  \fInew\fR. The  \fInew\fR result is
returned.
.SH USAGE
When compiling multithreaded applications, the \fB_REENTRANT\fR flag must be
defined on the compile line.  This flag should only be used in multithreaded
applications.
.SH EXAMPLES
\fBExample 1 \fRAn example of the \fBstrfind()\fR function.
.sp
.in +2
.nf
\fB/* find offset to substring "hello" within as1 */
i = strfind(as1, "hello");
/* trim junk from end of string */
s2 = strrspn(s1, "*?#$%");
*s2 = '\e0';
/* transform lower case to upper case */
a1[] = "abcdefghijklmnopqrstuvwxyz";
a2[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
s2 = strtrns(s1, a1, a2, s2);\fR
.fi
.in -2
.sp

.SH ATTRIBUTES
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
MT-Level	MT-Safe
.TE

.SH SEE ALSO
.BR string (3C),
.BR attributes (7)