atol(3) BSD Library Functions Manual atol(3)
NAME
atol, atoll, atol_l, atoll_l -- convert ASCII string to long or long long
integer
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <stdlib.h>
long
atol(const char *str);
long long
atoll(const char *str);
#include <xlocale.h>
long
atol_l(const char *str, locale_t loc);
long long
atoll_l(const char *str, locale_t loc);
DESCRIPTION
The atol() function converts the initial portion of the string pointed to
by str to long integer representation.
It is equivalent to:
strtol(str, (char **)NULL, 10);
The atoll() function converts the initial portion of the string pointed
to by str to long long integer representation.
It is equivalent to:
strtoll(str, (char **)NULL, 10);
While the atol() and atoll() functions use the current locale, the
atol_l() and atoll_l() functions may be passed locales directly. See
xlocale(3) for more information.
IMPLEMENTATION NOTES
The atol(), atoll(), atol_l(), and atoll_l() functions are thread-safe
and async-cancel-safe.
The FreeBSD implementations of the atol() and atoll() functions are thin
wrappers around strtol() and stroll() respectively, so these functions
will affect the value of errno in the same way that the strtol() and
stroll() functions are able to. This behavior of atol() and atoll() is
not required by ISO/IEC 9899:1990 (``ISO C90'') or ISO/IEC 9899:1999
(``ISO C99''), but it is allowed by all of ISO/IEC 9899:1990
(``ISO C90''), ISO/IEC 9899:1999 (``ISO C99'') and IEEE Std 1003.1-2001
(``POSIX.1'').
ERRORS
The functions atol() and atoll() may affect the value of errno on an
error.
SEE ALSO
atof(3), atoi(3), strtod(3), strtol(3), strtoul(3), xlocale(3)
STANDARDS
The atol() function conforms to ISO/IEC 9899:1990 (``ISO C90''). The
atoll() function conforms to ISO/IEC 9899:1999 (``ISO C99'').
BSD February 1, 2009 BSD
Mac OS X 10.8 - Generated Sun Aug 26 12:30:44 CDT 2012