isascii3p
Test for a 7-bit us-ascii character
Usage
#include <ctype.h>
int isascii(int c);
Prolog
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.
Overview
The isascii() function shall test whether c is a 7-bit US-ASCII character code.
The isascii() function is defined on all integer values.
Return value
The isascii() 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.
Errors
No errors are defined.
The following sections are informative.
Examples
None.
Application usage
The isascii() function cannot be used portably in a localized application.
Rationale
None.
Future directions
The isascii() function may be removed in a future version.