atoll man page on Archlinux

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

       atoi, atol, atoll, atoq - convert a string to an integer

       #include <stdlib.h>

       int atoi(const char *nptr);
       long atol(const char *nptr);
       long long atoll(const char *nptr);
       long long atoq(const char *nptr);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

	   _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L;
	   or cc -std=c99

       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.  atoq() is an obsolete name for atoll().

       The converted value.

   Multithreading (see pthreads(7))
       The  atoi(),  atol(), and atoll() functions are thread-safe with excep‐
       tions.  These functions can be safely used  in  multithreaded  applica‐
       tions,  as long as setlocale(3) is not called to change the locale dur‐
       ing their execution.

       SVr4, POSIX.1-2001, 4.3BSD, C99.	  C89  and  POSIX.1-1996  include  the
       functions atoi() and atol() only.  atoq() is a GNU extension.

       The  nonstandard atoq() function is not present in libc 4.6.27 or glibc
       2, but is present in libc5 and libc 4.7 (though only as an inline func‐
       tion in <stdlib.h> until libc 5.4.44).  The atoll() function is present
       in glibc 2 since version 2.0.2, but not in libc4 or libc5.

       atof(3), strtod(3), strtol(3), strtoul(3)

       This page is part of release 3.65 of the Linux  man-pages  project.   A
       description  of	the project, and information about reporting bugs, can
       be found at

GNU				  2014-01-22			       ATOI(3)

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