isblank(3)
- NetBSD Manual Pages
ISBLANK(3) NetBSD Library Functions Manual ISBLANK(3)
NAME
isblank -- blank-space character test
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <ctype.h>
int
isblank(int c);
DESCRIPTION
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 characters.
RETURN VALUES
The isblank() macro returns zero if the character tests false and returns
non-zero if the character tests true.
SEE ALSO
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)
CAVEATS
The argument to isblank() must be EOF or representable as an unsigned
char; otherwise, the result is undefined.
NetBSD 3.1 September 14, 1993 NetBSD 3.1
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