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

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

     isblank - blank-space character test

     #include <ctype.h>

     isblank(int c);

     The isblank() function tests for the standard blank-space characters.
     The standard blank-space characters are the following:

           ` '    Space character.
           \t     Horizontal tab.

     In the C locale, isblank() returns true only for the standard blank-space

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

     isalnum(3),  isalpha(3),  isascii(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)

OpenBSD 2.6                   September 14, 1993                             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)

Not portable (Not WIN16, WIN32, SunOS, Solaris)
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 isblank(3) functions
OpenBSD sources for isblank(3)

[Overview Topics]

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

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