freebsd-dev/lib/libc/stdlib/atoi.3
Ed Maste 3fb3b97c4d Renumber clauses to reduce diffs to other versions
NetBSD, OpenBSD, and Android's Bionic number the clauses 1 through 3,
so follow suit to make comparison easier.
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.\" Copyright (c) 1990, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
.\" This code is derived from software contributed to Berkeley by
.\" the American National Standards Committee X3, on Information
.\" Processing Systems.
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.\" @(#)atoi.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
.Dd June 4, 1993
.Dt ATOI 3
.Os
.Sh NAME
.Nm atoi
.Nd convert
.Tn ASCII
string to integer
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In stdlib.h
.Ft int
.Fn atoi "const char *nptr"
.Sh DESCRIPTION
The
.Fn atoi
function converts the initial portion of the string pointed to by
.Fa nptr
to
.Vt int
representation.
.Pp
It is equivalent to:
.Bd -literal -offset indent
(int)strtol(nptr, (char **)NULL, 10);
.Ed
.Pp
The
.Fn atoi
function has been deprecated by
.Fn strtol
and should not be used in new code.
.Sh ERRORS
The function
.Fn atoi
need not affect the value of
.Va errno
on an error.
.Sh SEE ALSO
.Xr atof 3 ,
.Xr atol 3 ,
.Xr strtod 3 ,
.Xr strtol 3 ,
.Xr strtoul 3
.Sh STANDARDS
The
.Fn atoi
function conforms to
.St -p1003.1-90 ,
.St -isoC ,
and
.St -isoC-99 .