atol(3) [osx man page]

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 func-
     tions 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

ATOL(3P)						     POSIX Programmer's Manual							  ATOL(3P)

PROLOG

       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME

       atol, atoll - convert a string to a long integer

SYNOPSIS

       #include <stdlib.h>

       long atol(const char *str);
       long long atoll(const char *nptr);

DESCRIPTION

       The call atol(str) shall be equivalent to:

	      strtol(str, (char **)NULL, 10)

       The call atoll(str) shall be equivalent to:

	      strtoll(nptr, (char **)NULL, 10)

       except that the handling of errors may differ. If the value cannot be represented, the behavior is undefined.

RETURN VALUE

       These functions shall return the converted value if the value can be represented.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       The atol() function is subsumed by strtol() but is retained because it is used extensively in existing code. If the number is not known	to
       be in range, strtol() should be used because atol() is not required to perform any error checking.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       strtol(), the Base Definitions volume of IEEE Std 1003.1-2001, <stdlib.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
       Electrical  and	Electronics  Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE
       and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can  be  obtained
       online at http://www.opengroup.org/unix/online.html .

IEEE
/The Open Group						       2003								  ATOL(3P)