xref: /minix3/lib/libc/stdlib/atoi.3 (revision 2fe8fb192fe7e8720e3e7a77f928da545e872a6a)
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
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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
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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
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30*2fe8fb19SBen Gras.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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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.
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