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