Libc-594.9.1.tar.gz

[apple/libc.git] / stdlib / atol.3

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.\"     @(#)atol.3	8.1 (Berkeley) 6/4/93
.\" $FreeBSD: src/lib/libc/stdlib/atol.3,v 1.13 2002/01/09 14:03:54 ru Exp $
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.Dd November 28, 2001
.Dt ATOL 3
.Os
.Sh NAME
.Nm atol , atoll ,
.Nm atol_l , atoll_l
.Nd convert
.Tn ASCII
string to
.Vt long
or
.Vt "long long"
integer
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In stdlib.h
.Ft long
.Fn atol "const char *str"
.Ft "long long"
.Fn atoll "const char *str"
.In xlocale.h
.Ft long
.Fn atol_l "const char *str" "locale_t loc"
.Ft "long long"
.Fn atoll_l "const char *str" "locale_t loc"
.Sh DESCRIPTION
The
.Fn atol
function converts the initial portion of the string pointed to by
.Fa str
to
.Vt long
integer
representation.
.Pp
It is equivalent to:
.Pp
.Dl "strtol(str, (char **)NULL, 10);"
.Pp
The
.Fn atoll
function converts the initial portion of the string pointed to by
.Fa str
to
.Vt "long long"
integer
representation.
.Pp
It is equivalent to:
.Pp
.Dl "strtoll(str, (char **)NULL, 10);"
.Pp
While the
.Fn atol
and
.Fn atoll
functions use the current locale, the
.Fn atol_l
and
.Fn atoll_l
functions may be passed locales directly. See
.Xr xlocale 3
for more information.
.Sh ERRORS
The functions
.Fn atol
and
.Fn atoll
need not
affect the value of
.Va errno
on an error.
.Sh SEE ALSO
.Xr atof 3 ,
.Xr atoi 3 ,
.Xr strtod 3 ,
.Xr strtol 3 ,
.Xr strtoul 3 ,
.Xr xlocale 3
.Sh STANDARDS
The
.Fn atol
function
conforms to
.St -isoC .
The
.Fn atoll
function
conforms to
.St -isoC-99 .