1ISASCII(3P) POSIX Programmer's Manual ISASCII(3P)
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6 This manual page is part of the POSIX Programmer's Manual. The Linux
7 implementation of this interface may differ (consult the corresponding
8 Linux manual page for details of Linux behavior), or the interface may
9 not be implemented on Linux.
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13 isascii — test for a 7-bit US-ASCII character
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16 #include <ctype.h>
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18 int isascii(int c);
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21 The isascii() function shall test whether c is a 7-bit US-ASCII charac‐
22 ter code.
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24 The isascii() function is defined on all integer values.
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27 The isascii() function shall return non-zero if c is a 7-bit US-ASCII
28 character code between 0 and octal 0177 inclusive; otherwise, it shall
29 return 0.
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32 No errors are defined.
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34 The following sections are informative.
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37 None.
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40 The isascii() function cannot be used portably in a localized applica‐
41 tion.
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44 None.
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47 The isascii() function may be removed in a future version.
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50 The Base Definitions volume of POSIX.1‐2008, <ctype.h>
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53 Portions of this text are reprinted and reproduced in electronic form
54 from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
55 -- Portable Operating System Interface (POSIX), The Open Group Base
56 Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
57 cal and Electronics Engineers, Inc and The Open Group. (This is
58 POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
59 event of any discrepancy between this version and the original IEEE and
60 The Open Group Standard, the original IEEE and The Open Group Standard
61 is the referee document. The original Standard can be obtained online
62 at http://www.unix.org/online.html .
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64 Any typographical or formatting errors that appear in this page are
65 most likely to have been introduced during the conversion of the source
66 files to man page format. To report such errors, see https://www.ker‐
67 nel.org/doc/man-pages/reporting_bugs.html .
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71IEEE/The Open Group 2013 ISASCII(3P)