1.\" Copyright (c) 1990, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" the American National Standards Committee X3, on Information 6.\" Processing Systems. 7.\" 8.\" Redistribution and use in source and binary forms, with or without 9.\" modification, are permitted provided that the following conditions 10.\" are met: 11.\" 1. Redistributions of source code must retain the above copyright 12.\" notice, this list of conditions and the following disclaimer. 13.\" 2. Redistributions in binary form must reproduce the above copyright 14.\" notice, this list of conditions and the following disclaimer in the 15.\" documentation and/or other materials provided with the distribution. 16.\" 3. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.Dd May 14, 2013 33.Dt ATOL 3 34.Os 35.Sh NAME 36.Nm atol , atoll 37.Nd convert 38.Tn ASCII 39string to 40.Vt long 41or 42.Vt "long long" 43integer 44.Sh LIBRARY 45.Lb libc 46.Sh SYNOPSIS 47.In stdlib.h 48.Ft long 49.Fn atol "const char *nptr" 50.Ft "long long" 51.Fn atoll "const char *nptr" 52.Sh DESCRIPTION 53The 54.Fn atol 55function converts the initial portion of the string pointed to by 56.Fa nptr 57to 58.Vt long 59integer 60representation. 61.Pp 62It is equivalent to: 63.Pp 64.Dl "strtol(nptr, (char **)NULL, 10);" 65.Pp 66The 67.Fn atoll 68function converts the initial portion of the string pointed to by 69.Fa nptr 70to 71.Vt "long long" 72integer 73representation. 74.Pp 75It is equivalent to: 76.Pp 77.Dl "strtoll(nptr, (char **)NULL, 10);" 78.Sh COMPATIBILITY 79The 80.Fx 81implementations of the 82.Fn atol 83and 84.Fn atoll 85functions are thin wrappers around 86.Fn strtol 87and 88.Fn strtoll 89respectively, so these functions will affect the value of 90.Va errno 91in the same way that the 92.Fn strtol 93and 94.Fn strtoll 95functions are able to. 96This behavior of 97.Fn atol 98and 99.Fn atoll 100is not required by 101.St -isoC 102or 103.St -isoC-99 , 104but it is allowed by all of 105.St -isoC , St -isoC-99 106and 107.St -p1003.1-2001 . 108.Sh ERRORS 109The functions 110.Fn atol 111and 112.Fn atoll 113may affect the value of 114.Va errno 115on an error. 116.Sh SEE ALSO 117.Xr atof 3 , 118.Xr atoi 3 , 119.Xr strtod 3 , 120.Xr strtol 3 , 121.Xr strtoul 3 122.Sh STANDARDS 123The 124.Fn atol 125function 126conforms to 127.St -isoC . 128The 129.Fn atoll 130function 131conforms to 132.St -isoC-99 . 133