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ctype.h File Reference

Critical sections support. More...

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## Functions
static int | isspace (int c)
| Check for white-space characters. These are: space, form-feed ('\f'), newline ('\n'), carriage return ('\r'), horizontal tab ('\t'), and vertical tab ('\v'). More...
static int | isascii (int c)
| Check whether `c` is a 7-bit unsigned char value that fits into the ASCII character set. More...
static int | isupper (int c)
| Check for an uppercase letter. More...
static int | islower (int c)
| Check for an lowercase letter. More...
static int | isalpha (int c)
| Check for an alphabetic character; it is equivalent to (isupper(c) || islower(c)) More...
static int | isdigit (int c)
| Check for a digit (0 through 9) More...
static int | isalnum (int c)
| Check for an alphanumeric character; it is equivalent to (isalpha(c) || isdigit(c)). More...
static int | isblank (int c)
| Check for a blank character; that is, a space or a tab. More...
static int | isxdigit (int c)
| Check for hexadecimal digits, that is, one of 0 1 2 3 4 5 6 7 8 9 a b c d e f A B C D E F. More...
static int | isprint (int c)
| Check for any printable character including space. More...
static int | isgraph (int c)
| Check for any printable character except space. More...
static int | ispunct (int c)
| Check for any printable character which is not a space or an alphanumeric character. More...
static int | iscntrl (int c)
| Check for a control character. More...
static int | toupper (int c)
| Convert lowercase letter to uppercase. More...
static int | tolower (int c)
| Convert uppercase letter to lowercase. More...

## Detailed Description

Critical sections support.

Copyright
  Copyright (c) 1982, 1988, 1991, 1993 The Regents of the University of California. All rights reserved. (c) UNIX System Laboratories, Inc. Portions copyright (c) 2009-2014, ARM Limited and Contributors.