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atol(3) [minix man page]

ATOI(3)                                                      Linux Programmer's Manual                                                     ATOI(3)

atoi, atol, atoll - convert a string to an integer SYNOPSIS
#include <stdlib.h> int atoi(const char *nptr); long atol(const char *nptr); long long atoll(const char *nptr); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): atoll(): __ISOC99_SOURCE || || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE DESCRIPTION
The atoi() function converts the initial portion of the string pointed to by nptr to int. The behavior is the same as strtol(nptr, NULL, 10); except that atoi() does not detect errors. The atol() and atoll() functions behave the same as atoi(), except that they convert the initial portion of the string to their return type of long or long long. RETURN VALUE
The converted value. ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +------------------------+---------------+----------------+ |Interface | Attribute | Value | +------------------------+---------------+----------------+ |atoi(), atol(), atoll() | Thread safety | MT-Safe locale | +------------------------+---------------+----------------+ CONFORMING TO
POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD. C89 and POSIX.1-1996 include the functions atoi() and atol() only. NOTES
Linux libc provided atoq() as an obsolete name for atoll(); atoq() is not provided by glibc. SEE ALSO
atof(3), strtod(3), strtol(3), strtoul(3) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at GNU 2016-03-15 ATOI(3)

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

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
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
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 . IEEE
/The Open Group 2003 ATOL(3P)
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