ISSPECIAL(3) BSD Library Functions Manual ISSPECIAL(3)NAME
isspecial -- special character test
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <ctype.h>
int
isspecial(int c);
DESCRIPTION
The isspecial() function tests for a special character.
RETURN VALUES
The isspecial() function returns zero if the character tests false and returns non-zero if the character tests true.
SEE ALSO ctype(3), iswspecial(3)HISTORY
The isspecial() function appeared in 4.4BSD.
BSD March 30, 2004 BSD
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ISALNUM(3) BSD Library Functions Manual ISALNUM(3)NAME
isalnum -- alphanumeric character test
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <ctype.h>
int
isalnum(int c);
DESCRIPTION
The isalnum() function tests for any character for which isalpha(3) or isdigit(3) is true.
RETURN VALUES
The isalnum() function returns zero if the character tests false and returns non-zero if the character tests true.
SEE ALSO ctype(3), isalpha(3), isascii(3), isblank(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)STANDARDS
The isalnum() function conforms to ANSI X3.159-1989 (``ANSI C89'').
CAVEATS
The argument to isalnum() must be EOF or representable as an unsigned char; otherwise, the behavior is undefined. See the CAVEATS section of
ctype(3) for more details.
BSD April 17, 2008 BSD