isascii(3) [netbsd man page]
ISASCII(3) BSD Library Functions Manual ISASCII(3) NAME
isascii -- test for ASCII character LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <ctype.h> int isascii(int c); DESCRIPTION
The isascii() function tests for an ASCII character, which is any character with a value in the range from 0 to 127, inclusive. The isascii() is defined on all integer values. SEE ALSO
ctype(3), isalnum(3), isalpha(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 isascii() function conforms to X/Open Portability Guide Issue 4 (``XPG4'') and IEEE Std 1003.1-2001 (``POSIX.1''). The IEEE Std 1003.1-2008 (``POSIX.1'') revision however marked it as obsolete, noting that isascii() cannot be used portably in a localized application. BSD
April 30, 2010 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