1ATOL(P)                    POSIX Programmer's Manual                   ATOL(P)
2
3
4

NAME

6       atol, atoll - convert a string to a long integer
7

SYNOPSIS

9       #include <stdlib.h>
10
11       long atol(const char *str);
12       long long atoll(const char *nptr);
13
14

DESCRIPTION

16       The call atol(str) shall be equivalent to:
17
18
19              strtol(str, (char **)NULL, 10)
20
21       The call atoll(str) shall be equivalent to:
22
23
24              strtoll(nptr, (char **)NULL, 10)
25
26       except  that  the handling of errors may differ. If the value cannot be
27       represented, the behavior is undefined.
28

RETURN VALUE

30       These functions shall return the converted value if the  value  can  be
31       represented.
32

ERRORS

34       No errors are defined.
35
36       The following sections are informative.
37

EXAMPLES

39       None.
40

APPLICATION USAGE

42       The  atol() function is subsumed by strtol() but is retained because it
43       is used extensively in existing code. If the number is not known to  be
44       in  range,  strtol()  should  be used because atol() is not required to
45       perform any error checking.
46

RATIONALE

48       None.
49

FUTURE DIRECTIONS

51       None.
52

SEE ALSO

54       strtol()  ,  the  Base  Definitions  volume  of   IEEE Std 1003.1-2001,
55       <stdlib.h>
56

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