ctype.h File Reference

Character types. More...

Go to the source code of this file.

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

Detailed Description

Character types.

Definition in file ctype.h.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

isdigit()

static 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 18 of file ctype.h.

                                            {

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

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

isxdigit()

static 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 29 of file ctype.h.

                                             {

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

isupper()

static 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 42 of file ctype.h.

                                            {

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

Referenced by isalpha(), and tolower().

islower()

static 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 53 of file ctype.h.

                                            {

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

Referenced by isalpha(), and toupper().

isalpha()

static int isalpha ( int  character )

inlinestatic

Check if character is alphabetic.

Parameters

character

ASCII character

Return values

is_alpha

Character is alphabetic

Definition at line 64 of file ctype.h.

                                            {

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

References islower(), and isupper().

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

isalnum()

static int isalnum ( int  character )

inlinestatic

Check if character is alphanumeric.

Parameters

character

ASCII character

Return values

is_alnum

Character is alphanumeric

Definition at line 75 of file ctype.h.

                                            {

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

References isalpha(), and isdigit().

isprint()

static int isprint ( int  character )

inlinestatic

Check if character is printable.

Parameters

character

ASCII character

Return values

is_print

Character is printable

Definition at line 86 of file ctype.h.

                                            {

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

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

tolower()

static int tolower ( int  character )

inlinestatic

Convert character to lower case.

Parameters

character	Character
character	Lower-case character

Definition at line 97 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()

static int toupper ( int  character )

inlinestatic

Convert character to upper case.

Parameters

character	Character
character	Upper-case character

Definition at line 109 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

)

Check to see if character is a space.

Parameters

character

Character

Return values

isspace

Character is a space

Definition at line 41 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().