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isalnum(3p) [centos man page]

ISALNUM(3P)						     POSIX Programmer's Manual						       ISALNUM(3P)

PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond- ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux. NAME
isalnum - test for an alphanumeric character SYNOPSIS
#include <ctype.h> int isalnum(int c); DESCRIPTION
The isalnum() function shall test whether c is a character of class alpha or digit in the program's current locale; see the Base Defini- tions volume of IEEE Std 1003.1-2001, Chapter 7, Locale. The c argument is an int, the value of which the application shall ensure is representable as an unsigned char or equal to the value of the macro EOF. If the argument has any other value, the behavior is undefined. RETURN VALUE
The isalnum() function shall return non-zero if c is an alphanumeric character; otherwise, it shall return 0. ERRORS
No errors are defined. The following sections are informative. EXAMPLES
None. APPLICATION USAGE
To ensure applications portability, especially across natural languages, only this function and those listed in the SEE ALSO section should be used for character classification. RATIONALE
None. FUTURE DIRECTIONS
None. SEE ALSO
isalpha(), iscntrl(), isdigit(), isgraph(), islower(), isprint(), ispunct(), isspace(), isupper(), isxdigit(), setlocale(), the Base Defi- nitions volume of IEEE Std 1003.1-2001, Chapter 7, Locale, <ctype.h>, <stdio.h> COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol- ogy -- 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 original Standard can be obtained online at http://www.opengroup.org/unix/online.html . IEEE
/The Open Group 2003 ISALNUM(3P)

Check Out this Related Man Page

ISPUNCT(3P)						     POSIX Programmer's Manual						       ISPUNCT(3P)

PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond- ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux. NAME
ispunct - test for a punctuation character SYNOPSIS
#include <ctype.h> int ispunct(int c); DESCRIPTION
The ispunct() function shall test whether c is a character of class punct in the program's current locale; see the Base Definitions volume of IEEE Std 1003.1-2001, Chapter 7, Locale. The c argument is an int, the value of which the application shall ensure is a character representable as an unsigned char or equal to the value of the macro EOF. If the argument has any other value, the behavior is undefined. RETURN VALUE
The ispunct() function shall return non-zero if c is a punctuation character; otherwise, it shall return 0. ERRORS
No errors are defined. The following sections are informative. EXAMPLES
None. APPLICATION USAGE
To ensure applications portability, especially across natural languages, only this function and those listed in the SEE ALSO section should be used for character classification. RATIONALE
None. FUTURE DIRECTIONS
None. SEE ALSO
isalnum(), isalpha(), iscntrl(), isdigit(), isgraph(), islower(), isprint(), isspace(), isupper(), isxdigit(), setlocale(), the Base Defi- nitions volume of IEEE Std 1003.1-2001, Chapter 7, Locale, <ctype.h> COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol- ogy -- 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 original Standard can be obtained online at http://www.opengroup.org/unix/online.html . IEEE
/The Open Group 2003 ISPUNCT(3P)
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