1ATOL(3P)                   POSIX Programmer's Manual                  ATOL(3P)
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PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
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NAME

12       atol, atoll - convert a string to a long integer
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SYNOPSIS

15       #include <stdlib.h>
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17       long atol(const char *str);
18       long long atoll(const char *nptr);
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DESCRIPTION

22       The call atol(str) shall be equivalent to:
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25              strtol(str, (char **)NULL, 10)
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27       The call atoll(str) shall be equivalent to:
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30              strtoll(nptr, (char **)NULL, 10)
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32       except that the handling of errors may differ. If the value  cannot  be
33       represented, the behavior is undefined.
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RETURN VALUE

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

40       No errors are defined.
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42       The following sections are informative.
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EXAMPLES

45       None.
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APPLICATION USAGE

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

54       None.
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FUTURE DIRECTIONS

57       None.
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SEE ALSO

60       strtol(),   the   Base   Definitions  volume  of  IEEE Std 1003.1-2001,
61       <stdlib.h>
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64       Portions of this text are reprinted and reproduced in  electronic  form
65       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
66       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
67       Specifications  Issue  6,  Copyright  (C) 2001-2003 by the Institute of
68       Electrical and Electronics Engineers, Inc and The Open  Group.  In  the
69       event of any discrepancy between this version and the original IEEE and
70       The Open Group Standard, the original IEEE and The Open Group  Standard
71       is  the  referee document. The original Standard can be obtained online
72       at http://www.opengroup.org/unix/online.html .
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76IEEE/The Open Group                  2003                             ATOL(3P)
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