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Command: isspace | Section: 3 | Source: OpenBSD | File: isspace.3
ISSPACE(3) FreeBSD Library Functions Manual ISSPACE(3)
NAME
isspace, isspace_l - whitespace single-byte character test
SYNOPSIS
#include <ctype.h>
int
isspace(int c);
int
isspace_l(int c, locale_t locale);
DESCRIPTION
The isspace() and isspace_l() functions test for whitespace characters.
In the C locale, the complete list of whitespace characters is:
` ' Space character.
\f Form feed.
\n New-line.
\r Carriage return.
\t Horizontal tab.
\v And vertical tab.
OpenBSD always uses the C locale for these functions, ignoring the global
locale, the thread-specific locale, and the locale argument.
RETURN VALUES
These functions return zero if the character tests false or non-zero if
the character tests true.
ENVIRONMENT
On systems supporting non-ASCII single-byte character encodings, these
functions may return non-zero for additional characters, and the results
of isspace() may depend on the LC_CTYPE locale(1).
SEE ALSO
isalnum(3), isalpha(3), isascii(3), isblank(3), iscntrl(3), isdigit(3),
isgraph(3), islower(3), isprint(3), ispunct(3), isupper(3), iswspace(3),
isxdigit(3), stdio(3), toascii(3), tolower(3), toupper(3), ascii(7)
STANDARDS
The isspace() function conforms to ANSI X3.159-1989 ("ANSI C89"), and
isspace_l() to IEEE Std 1003.1-2008 ("POSIX.1").
HISTORY
The isspace() function first appeared in Version 7 AT&T UNIX, and
isspace_l() has been available since OpenBSD 6.2.
CAVEATS
The argument c must be EOF or representable as an unsigned char;
otherwise, the result is undefined.
FreeBSD 14.1-RELEASE-p8 September 11, 2022 FreeBSD 14.1-RELEASE-p8