! Aware to man pages: isalnum(3)

isalnum(3)

Tips: Browse or Search all pages for efficient awareness of more than 6000 of the most popular reusable and open source applications, functions, libraries, and FAQs.

The "RKT couplings" below include links to source code, updates, additional information, advice, FAQs, and overviews.

Home

Search all pages

Subjects

By activity
Professions, Sciences, Humanities, Business, ...

User Interface
Text-based, GUI, Audio, Video, Keyboards, Mouse, Images,...

Text Strings
Conversions, tests, processing, manipulation,...

Math
Integer, Floating point, Matrix, Statistics, Boolean, ...

Processing
Algorithms, Memory, Process control, Debugging, ...

Stored Data
Data storage, Integrity, Encryption, Compression, ...

Communications
Networks, protocols, Interprocess, Remote, Client Server, ...

Hard World
Timing, Calendar and Clock, Audio, Video, Printer, Controls...

File System
Management, Filtering, File & Directory access, Viewers, ...

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

[ANSI C X3.159-1989]

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

NAME
     isalnum - alphanumeric character test



SYNOPSIS
     #include <ctype.h>

     int
     isalnum(int c);

DESCRIPTION
     The isalnum() macro tests for any character for which isalpha(3) or is-
     digit(3) is true.

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

SEE ALSO
     isalpha(3),  isascii(3),  isblank(3),  iscntrl(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)

STANDARDS
     The isalnum() 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 isalnum(3) functions
OpenBSD sources for isalnum(3)

[Overview Topics]

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

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

[ANSI C X3.159-1989]

Rapid-Links: Search | About | Comments | Submit Path: RocketAware > man pages > isalnum.3/