freebsd-dev/lib/libc/stdlib/atol.3

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.\" Copyright (c) 1990, 1991, 1993
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.\"
.\" This code is derived from software contributed to Berkeley by
.\" the American National Standards Committee X3, on Information
.\" Processing Systems.
.\"
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.\" modification, are permitted provided that the following conditions
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.\" California, Berkeley and its contributors.
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.\" @(#)atol.3 8.1 (Berkeley) 6/4/93
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.\" $FreeBSD$
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.\"
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.Dd November 28, 2001
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.Dt ATOL 3
.Os
.Sh NAME
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.Nm atol , atoll
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.Nd convert
.Tn ASCII
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string to
.Vt long
or
.Vt "long long"
integer
.Sh LIBRARY
.Lb libc
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.Sh SYNOPSIS
.In stdlib.h
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.Ft long
.Fn atol "const char *nptr"
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.Ft "long long"
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.Fn atoll "const char *nptr"
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.Sh DESCRIPTION
The
.Fn atol
function converts the initial portion of the string pointed to by
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.Fa nptr
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to
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.Vt long
integer
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representation.
.Pp
It is equivalent to:
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.Pp
.Dl "strtol(nptr, (char **)NULL, 10);"
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.Pp
The
.Fn atoll
function converts the initial portion of the string pointed to by
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.Fa nptr
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to
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.Vt "long long"
integer
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representation.
.Pp
It is equivalent to:
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.Pp
.Dl "strtoll(nptr, (char **)NULL, 10);"
.Sh ERRORS
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The functions
.Fn atol
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and
.Fn atoll
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need not
affect the value of
.Va errno
on an error.
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.Sh SEE ALSO
.Xr atof 3 ,
.Xr atoi 3 ,
.Xr strtod 3 ,
.Xr strtol 3 ,
.Xr strtoul 3
.Sh STANDARDS
The
.Fn atol
function
conforms to
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.St -isoC .
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The
.Fn atoll
function
conforms to
.St -isoC-99 .