Linux 2.6 - man page for isascii (linux section 3posix)
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ISASCII(P) POSIX Programmer's Manual ISASCII(P)
isascii - test for a 7-bit US-ASCII character
int isascii(int c);
The isascii() function shall test whether c is a 7-bit US-ASCII character code.
The isascii() function is defined on all integer values.
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.
No errors are defined.
The following sections are informative.
The Base Definitions volume of IEEE Std 1003.1-2001, <ctype.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE Std
1003.1, 2003 Edition, Standard for Information Technology -- 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 orig-
inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 ISASCII(P)
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