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 3.0.1 September 14, 1993 NetBSD 3.0.1

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