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RocketLink!--> Man page versions: OpenBSD FreeBSD Others

[ANSI C X3.159-1989]

ISCNTRL(3)                OpenBSD Programmer's Manual               ISCNTRL(3)

     iscntrl - control character test

     #include <ctype.h>

     iscntrl(int c);

     The iscntrl() function tests for any control character.

     The iscntrl() macro returns zero if the character tests false or non-zero
     if the character tests true.

     isalnum(3),  isalpha(3),  isascii(3),  isblank(3),  isdigit(3),
     isgraph(3),  islower(3),  isprint(3),  ispunct(3),  isspace(3),
     isupper(3),  isxdigit(3),  stdio(3),  toascii(3),  tolower(3),
     toupper(3),  ascii(7)

     The iscntrl() function conforms to ANSI X3.159-1989 (``ANSI C'').

OpenBSD 2.6                      June 29, 1991                               1

Source: OpenBSD 2.6 man pages. Copyright: Portions are copyrighted by BERKELEY
SOFTWARE DESIGN, INC., The Regents of the University of California, Massachusetts
Institute of Technology, Free Software Foundation, FreeBSD Inc., and others.

(Corrections, notes, and links courtesy of RocketAware.com)

Behavior when (ch & 0x80) not portable. (Linux, WIN16 and WIN32 false; Solaris undefined when signed char)
setlocale(3), when provided, may change the behavior.
Often provided as both a function and a macro. #undef the macro to access the function version.

[Detailed Topics]
FreeBSD Sources for iscntrl(3) functions
OpenBSD sources for iscntrl(3)

[Overview Topics]

Up to: Character Tests and Operations - isblank, toupper, etc.

RocketLink!--> Man page versions: OpenBSD FreeBSD Others

[ANSI C X3.159-1989]

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