ctype.h File Reference

Character types. More...

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
	FILE_SECBOOT (PERMITTED)
static int	isascii (int character)
	Check if character is ASCII.
static int	isdigit (int character)
	Check if character is a decimal digit.
static int	isxdigit (int character)
	Check if character is a hexadecimal digit.
static int	isupper (int character)
	Check if character is an upper-case letter.
static int	islower (int character)
	Check if character is a lower-case letter.
static int	isalpha (int character)
	Check if character is alphabetic.
static int	isalnum (int character)
	Check if character is alphanumeric.
static int	isprint (int character)
	Check if character is printable.
static int	tolower (int character)
	Convert character to lower case.
static int	toupper (int character)
	Convert character to upper case.
int	isspace (int character)
	Check to see if character is a space.

Detailed Description

Character types.

Definition in file ctype.h.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

FILE_SECBOOT()

FILE_SECBOOT

(

PERMITTED

)

isascii()

int isascii ( int character )

inlinestatic

Check if character is ASCII.

Parameters

character

Character

Return values

is_ascii

Character is an ASCII character

Definition at line 19 of file ctype.h.

                                            {
 
        return ( character <= '\x7f' );
}

Referenced by parse_key().

isdigit()

int isdigit ( int character )

inlinestatic

Check if character is a decimal digit.

Parameters

character

ASCII character

Return values

is_digit

Character is a decimal digit

Definition at line 30 of file ctype.h.

                                            {
 
        return ( ( character >= '0' ) && ( character <= '9' ) );
}

Referenced by asn1_generalized_time(), gdbstub_from_hex_digit(), getkey(), isalnum(), and pnm_probe().

isxdigit()

int isxdigit ( int character )

inlinestatic

Check if character is a hexadecimal digit.

Parameters

character

ASCII character

Return values

is_xdigit

Character is a hexadecimal digit

Definition at line 41 of file ctype.h.

                                             {
 
        return ( ( ( character >= '0' ) && ( character <= '9' ) ) ||
                 ( ( character >= 'A' ) && ( character <= 'F' ) ) ||
                 ( ( character >= 'a' ) && ( character <= 'f' ) ) );
}

isupper()

int isupper ( int character )

inlinestatic

Check if character is an upper-case letter.

Parameters

character

ASCII character

Return values

is_upper

Character is an upper-case letter

Definition at line 54 of file ctype.h.

                                            {
 
        return ( ( character >= 'A' ) && ( character <= 'Z' ) );
}

Referenced by isalpha(), and tolower().

islower()

int islower ( int character )

inlinestatic

Check if character is a lower-case letter.

Parameters

character

ASCII character

Return values

is_lower

Character is a lower-case letter

Definition at line 65 of file ctype.h.

                                            {
 
        return ( ( character >= 'a' ) && ( character <= 'z' ) );
}

Referenced by isalpha(), and toupper().

isalpha()

int isalpha ( int character )

inlinestatic

Check if character is alphabetic.

Parameters

character

ASCII character

Return values

is_alpha

Character is alphabetic

Definition at line 76 of file ctype.h.

                                            {
 
        return ( isupper ( character ) || islower ( character ) );
}

References islower(), and isupper().

Referenced by getkey(), isalnum(), key_remap(), and parse_uri().

isalnum()

int isalnum ( int character )

inlinestatic

Check if character is alphanumeric.

Parameters

character

ASCII character

Return values

is_alnum

Character is alphanumeric

Definition at line 87 of file ctype.h.

                                            {
 
        return ( isalpha ( character ) || isdigit ( character ) );
}

References isalpha(), and isdigit().

Referenced by fdt_permitted().

isprint()

int isprint ( int character )

inlinestatic

Check if character is printable.

Parameters

character

ASCII character

Return values

is_print

Character is printable

Definition at line 98 of file ctype.h.

                                            {
 
        return ( ( character >= ' ' ) && ( character <= '~' ) );
}

Referenced by dbg_hex_dump_da_row(), deflate_inflate(), editstring_okx(), efifb_glyphs(), ftp_check_string(), syslog_fix_name(), and uri_character_escaped().

tolower()

int tolower ( int character )

inlinestatic

Convert character to lower case.

Parameters

character	Character
character	Lower-case character

Definition at line 109 of file ctype.h.

                                            {
 
        return ( isupper ( character ) ?
                 ( character - 'A' + 'a' ) : character );
}

References isupper().

Referenced by dns_compare(), gdbstub_from_hex_digit(), and iscsi_large_binary_decode().

toupper()

int toupper ( int character )

inlinestatic

Convert character to upper case.

Parameters

character	Character
character	Upper-case character

Definition at line 121 of file ctype.h.

                                            {
 
        return ( islower ( character ) ?
                 ( character - 'a' + 'A' ) : character );
}

References islower().

Referenced by getkey(), ntlm_key(), peerdisc_open(), pxe_menu_select(), and strncasecmp().

isspace()

int isspace ( int character )

extern

Check to see if character is a space.

Parameters

character

Character

Return values

isspace

Character is a space

Definition at line 42 of file ctype.c.

                              {
 
        switch ( character ) {
        case ' ' :
        case '\f' :
        case '\n' :
        case '\r' :
        case '\t' :
        case '\v' :
                return 1;
        default:
                return 0;
        }
}

Referenced by base64_decode(), cmdline_init(), efi_cmdline_init(), http_parse_header(), http_token(), image_argument(), peerdist_discovery_reply_values(), pnm_ascii(), pnm_probe(), previous_word(), process_script(), script_probe(), split_command(), strtoul_pre(), and syslog_fix_name().