ISASCII(3)                 POSIX Programmer's Manual                ISASCII(3)



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


NNAAMMEE
       isascii -- test for a 7-bit US-ASCII character

SSYYNNOOPPSSIISS
       #include <ctype.h>

       int isascii(int _c);

DDEESSCCRRIIPPTTIIOONN
       The _i_s_a_s_c_i_i() function shall test whether _c is a 7-bit US-ASCII
       character code.

       The _i_s_a_s_c_i_i() function is defined on all integer values.

RREETTUURRNN VVAALLUUEE
       The _i_s_a_s_c_i_i() function shall return non-zero if _c is a 7-bit US-ASCII
       character code between 0 and octal 0177 inclusive; otherwise, it shall
       return 0.

EERRRROORRSS
       No errors are defined.

       _T_h_e _f_o_l_l_o_w_i_n_g _s_e_c_t_i_o_n_s _a_r_e _i_n_f_o_r_m_a_t_i_v_e_.

EEXXAAMMPPLLEESS
       None.

AAPPPPLLIICCAATTIIOONN UUSSAAGGEE
       The _i_s_a_s_c_i_i() function cannot be used portably in a localized
       application.

RRAATTIIOONNAALLEE
       None.

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       The _i_s_a_s_c_i_i() function may be removed in a future version.

SSEEEE AALLSSOO
       The Base Definitions volume of POSIX.1-2008, <<ccttyyppee..hh>>

CCOOPPYYRRIIGGHHTT
       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
       -- Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open Group.  (This is
       POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .



IEEE/The Open Group                  2013                           ISASCII(3)
