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isspace.0
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1992-08-10
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ISSPACE(3) UNIX Programmer's Manual ISSPACE(3)
NNAAMMEE
iissssppaaccee - whitespace character test
SSYYNNOOPPSSIISS
##iinncclluuddee <<ccttyyppee..hh>>
_i_n_t
iissssppaaccee(_i_n_t _c)
DDEESSCCRRIIPPTTIIOONN
The iissssppaaccee() function tests for the standard whitespace characters for
which isalnum(3) is false. The standard whitespace characters are the
following:
` ' Space character.
\f Form feed.
\n Newline.
\r Carriage return.
\t Horizontal tab.
\v And vertical tab.
In the _`_`_C_'_' locale, iissssppaaccee() returns true only for the standard white
space characters.
RREETTUURRNN VVAALLUUEESS
The iissssppaaccee() macro returns zero if the character tests false and returns
nonzero if the character tests true.
SSEEEE AALLSSOO
isascii(3), isalnum(3), isalpha(3), iscntrl(3), isdigit(3),
isgraph(3), islower(3), isprint(3), ispunct(3), isupper(3),
isxdigit(3), toascii(3), tolower(3), toupper(3), stdio(3) ascii(7)
SSTTAANNDDAARRDDSS
The iissssppaaccee() function conforms to ANSI C3.1591989 (``ANSI C'').
BSD Experimental July 31, 1991 1