1*2fe8fb19SBen Gras.\" $NetBSD: atoi.3,v 1.10 2003/08/07 16:43:38 agc Exp $ 2*2fe8fb19SBen Gras.\" 3*2fe8fb19SBen Gras.\" Copyright (c) 1990, 1991, 1993 4*2fe8fb19SBen Gras.\" The Regents of the University of California. All rights reserved. 5*2fe8fb19SBen Gras.\" 6*2fe8fb19SBen Gras.\" This code is derived from software contributed to Berkeley by 7*2fe8fb19SBen Gras.\" the American National Standards Committee X3, on Information 8*2fe8fb19SBen Gras.\" Processing Systems. 9*2fe8fb19SBen Gras.\" 10*2fe8fb19SBen Gras.\" Redistribution and use in source and binary forms, with or without 11*2fe8fb19SBen Gras.\" modification, are permitted provided that the following conditions 12*2fe8fb19SBen Gras.\" are met: 13*2fe8fb19SBen Gras.\" 1. Redistributions of source code must retain the above copyright 14*2fe8fb19SBen Gras.\" notice, this list of conditions and the following disclaimer. 15*2fe8fb19SBen Gras.\" 2. Redistributions in binary form must reproduce the above copyright 16*2fe8fb19SBen Gras.\" notice, this list of conditions and the following disclaimer in the 17*2fe8fb19SBen Gras.\" documentation and/or other materials provided with the distribution. 18*2fe8fb19SBen Gras.\" 3. Neither the name of the University nor the names of its contributors 19*2fe8fb19SBen Gras.\" may be used to endorse or promote products derived from this software 20*2fe8fb19SBen Gras.\" without specific prior written permission. 21*2fe8fb19SBen Gras.\" 22*2fe8fb19SBen Gras.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23*2fe8fb19SBen Gras.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24*2fe8fb19SBen Gras.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25*2fe8fb19SBen Gras.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26*2fe8fb19SBen Gras.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27*2fe8fb19SBen Gras.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28*2fe8fb19SBen Gras.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29*2fe8fb19SBen Gras.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30*2fe8fb19SBen Gras.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31*2fe8fb19SBen Gras.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32*2fe8fb19SBen Gras.\" SUCH DAMAGE. 33*2fe8fb19SBen Gras.\" 34*2fe8fb19SBen Gras.\" from: @(#)atoi.3 8.1 (Berkeley) 6/4/93 35*2fe8fb19SBen Gras.\" 36*2fe8fb19SBen Gras.Dd June 4, 1993 37*2fe8fb19SBen Gras.Dt ATOI 3 38*2fe8fb19SBen Gras.Os 39*2fe8fb19SBen Gras.Sh NAME 40*2fe8fb19SBen Gras.Nm atoi 41*2fe8fb19SBen Gras.Nd convert 42*2fe8fb19SBen Gras.Tn ASCII 43*2fe8fb19SBen Grasstring to integer 44*2fe8fb19SBen Gras.Sh LIBRARY 45*2fe8fb19SBen Gras.Lb libc 46*2fe8fb19SBen Gras.Sh SYNOPSIS 47*2fe8fb19SBen Gras.In stdlib.h 48*2fe8fb19SBen Gras.Ft int 49*2fe8fb19SBen Gras.Fn atoi "const char *nptr" 50*2fe8fb19SBen Gras.Sh DESCRIPTION 51*2fe8fb19SBen GrasThe 52*2fe8fb19SBen Gras.Fn atoi 53*2fe8fb19SBen Grasfunction converts the initial portion of the string pointed to by 54*2fe8fb19SBen Gras.Em nptr 55*2fe8fb19SBen Grasto 56*2fe8fb19SBen Gras.Em integer 57*2fe8fb19SBen Grasrepresentation. 58*2fe8fb19SBen Gras.Pp 59*2fe8fb19SBen GrasIt is equivalent to: 60*2fe8fb19SBen Gras.Bd -literal -offset indent 61*2fe8fb19SBen Gras(int)strtol(nptr, (char **)NULL, 10); 62*2fe8fb19SBen Gras.Ed 63*2fe8fb19SBen Gras.Sh SEE ALSO 64*2fe8fb19SBen Gras.Xr atof 3 , 65*2fe8fb19SBen Gras.Xr atol 3 , 66*2fe8fb19SBen Gras.Xr strtod 3 , 67*2fe8fb19SBen Gras.Xr strtol 3 , 68*2fe8fb19SBen Gras.Xr strtoul 3 69*2fe8fb19SBen Gras.Sh STANDARDS 70*2fe8fb19SBen GrasThe 71*2fe8fb19SBen Gras.Fn atoi 72*2fe8fb19SBen Grasfunction conforms to 73*2fe8fb19SBen Gras.St -ansiC . 74*2fe8fb19SBen Gras.Sh CAVEATS 75*2fe8fb19SBen Gras.Nm 76*2fe8fb19SBen Grasdoes no overflow checking, handles unsigned numbers poorly, 77*2fe8fb19SBen Grasand handles strings containing trailing extra characters 78*2fe8fb19SBen Gras(like 79*2fe8fb19SBen Gras.Dq 123abc ) 80*2fe8fb19SBen Graspoorly. 81*2fe8fb19SBen GrasCareful use of 82*2fe8fb19SBen Gras.Xr strtol 3 83*2fe8fb19SBen Grasand 84*2fe8fb19SBen Gras.Xr strtoul 3 85*2fe8fb19SBen Grascan alleviate these problems. 86