ISBLANK (3) | C library functions | Unix Manual Pages | :man ▋
NAME
isblank - space or tab character test
CONTENTS
Library Synopsis Description Return Values Compatibility See Also Standards
LIBRARY
SYNOPSIS
int isblank "int c"
DESCRIPTION
The isblank function tests for a space or tab character. For any locale, this includes the following standard characters:
In the "C" locale isblank successful test is limited to this characters only. For single C char s locales (see multibyte (3)) the value of the argument is representable as an unsigned char or the value of EOF .
RETURN VALUES
The isblank function returns zero if the character tests false and returns non-zero if the character tests true.
COMPATIBILITY
The BSD 4.4 extension of accepting arguments outside of the range of the iswblank function should be used instead.
SEE ALSO
ctype (3),iswblank (3),multibyte (3),ascii (7)
STANDARDS
