strings.h File Reference

String functions. More...

#include <string.h>
#include <bits/strings.h>

Go to the source code of this file.

Macros
#define	ffsll(x)   ( __builtin_constant_p ( x ) ? __constant_ffsll ( x ) : __ffsll ( x ) )
	Find first (i.e. More...
#define	ffsl(x)   ( __builtin_constant_p ( x ) ? __constant_ffsl ( x ) : __ffsl ( x ) )
	Find first (i.e. More...
#define	ffs(x)   ffsl ( x )
	Find first (i.e. More...
#define	flsll(x)   ( __builtin_constant_p ( x ) ? __constant_flsll ( x ) : __flsll ( x ) )
	Find last (i.e. More...
#define	flsl(x)   ( __builtin_constant_p ( x ) ? __constant_flsl ( x ) : __flsl ( x ) )
	Find last (i.e. More...
#define	fls(x)   flsl ( x )
	Find last (i.e. More...

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
static	__attribute__ ((always_inline)) int __constant_ffsll(unsigned long long x)
	Find first (i.e. More...
int	__ffsll (long long x)
int	__ffsl (long x)
int	__flsll (long long x)
int	__flsl (long x)
int __pure	strcasecmp (const char *first, const char *second) __nonnull
	Compare case-insensitive strings. More...
int __pure	strncasecmp (const char *first, const char *second, size_t max) __nonnull
	Compare case-insensitive strings. More...

Variables
static void *	dest
static void size_t	len

Detailed Description

String functions.

Definition in file strings.h.

Macro Definition Documentation

ffsll

#define ffsll

(

x

)

( __builtin_constant_p ( x ) ? __constant_ffsll ( x ) : __ffsll ( x ) )

Find first (i.e.

least significant) set bit

Parameters

x

Value

Return values

lsb	Least significant bit set in value (LSB=1), or zero

Definition at line 122 of file strings.h.

ffsl

#define ffsl

(

x

)

( __builtin_constant_p ( x ) ? __constant_ffsl ( x ) : __ffsl ( x ) )

Find first (i.e.

least significant) set bit

Parameters

x

Value

Return values

lsb	Least significant bit set in value (LSB=1), or zero

Definition at line 131 of file strings.h.

ffs

#define ffs

(

x

)

ffsl ( x )

Find first (i.e.

least significant) set bit

Parameters

x

Value

Return values

lsb	Least significant bit set in value (LSB=1), or zero

Definition at line 140 of file strings.h.

flsll

#define flsll

(

x

)

( __builtin_constant_p ( x ) ? __constant_flsll ( x ) : __flsll ( x ) )

Find last (i.e.

most significant) set bit

Parameters

x

Value

Return values

msb	Most significant bit set in value (LSB=1), or zero

Definition at line 148 of file strings.h.

flsl

#define flsl

(

x

)

( __builtin_constant_p ( x ) ? __constant_flsl ( x ) : __flsl ( x ) )

Find last (i.e.

most significant) set bit

Parameters

x

Value

Return values

msb	Most significant bit set in value (LSB=1), or zero

Definition at line 157 of file strings.h.

fls

#define fls

(

x

)

flsl ( x )

Find last (i.e.

most significant) set bit

Parameters

x

Value

Return values

msb	Most significant bit set in value (LSB=1), or zero

Definition at line 166 of file strings.h.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

__attribute__()

static __attribute__ ( (always_inline)  )

inlinestatic

Find first (i.e.

Zero memory.

Copy memory.

Find last (i.e.

least significant) set bit

Parameters

x

Value

Return values

lsb	Least significant bit set in value (LSB=1), or zero

most significant) set bit

Parameters

x

Value

Return values

msb	Most significant bit set in value (LSB=1), or zero

Parameters

src	Source
dest	Destination
len	Length
dest	Destination
len	Length

Definition at line 21 of file strings.h.

                                          {
        int r = 0;

        if ( ! ( x & 0x00000000ffffffffULL ) ) {
                x >>= 32;
                r += 32;
        }
        if ( ! ( x & 0x0000ffffUL ) ) {
                x >>= 16;
                r += 16;
        }
        if ( ! ( x & 0x00ff ) ) {
                x >>= 8;
                r += 8;
        }
        if ( ! ( x & 0x0f ) ) {
                x >>= 4;
                r += 4;
        }
        if ( ! ( x & 0x3 ) ) {
                x >>= 2;
                r += 2;
        }
        if ( ! ( x & 0x1 ) ) {
                x >>= 1;
                r += 1;
        }
        return ( x ? ( r + 1 ) : 0 );
}

References r, and x.

__ffsll()

int __ffsll

(

long long

x

)

__ffsl()

int __ffsl

(

long

x

)

__flsll()

int __flsll

(

long long

x

)

__flsl()

int __flsl

(

long

x

)

strcasecmp()

int __pure strcasecmp	(	const char *	first,
		const char *	second
	)

Compare case-insensitive strings.

Parameters

first	First string
second	Second string

Return values

diff	Difference

Definition at line 208 of file string.c.

                                                         {

        return strncasecmp ( first, second, ~( ( size_t ) 0 ) );
}

References first, and strncasecmp().

Referenced by com32_identify(), comboot_identify(), efi_block_label(), efi_file_find(), efi_file_open(), efi_local_check_volume_name(), efi_snp_hii_fetch(), efi_snp_hii_store(), http_authentication(), http_digest_authenticate(), http_format_metadata_flavor(), http_parse_connection(), http_parse_content_encoding(), http_parse_digest_auth(), http_parse_header(), http_parse_transfer_encoding(), http_scheme(), parse_fc_els_handler(), string_test_exec(), sundance_probe(), tftp_process_option(), uart_find(), and xfer_uri_opener().

strncasecmp()

int __pure strncasecmp	(	const char *	first,
		const char *	second,
		size_t	max
	)

Compare case-insensitive strings.

Parameters

first	First string
second	Second string
max	Maximum length to compare

Return values

diff	Difference

Definition at line 221 of file string.c.

                                                                      {
        const uint8_t *first_bytes = ( ( const uint8_t * ) first );
        const uint8_t *second_bytes = ( ( const uint8_t * ) second );
        int diff;

        for ( ; max-- ; first_bytes++, second_bytes++ ) {
                diff = ( toupper ( *first_bytes ) -
                         toupper ( *second_bytes ) );
                if ( diff )
                        return diff;
                if ( ! *first_bytes )
                        return 0;
        }
        return 0;
}

References first, max, and toupper().

Referenced by efi_file_open(), strcasecmp(), string_test_exec(), and x509_check_dnsname().

Variable Documentation

dest

void* dest

Definition at line 176 of file strings.h.

len

size_t len

Initial value:

{
        memmove ( dest, src, len )

Definition at line 176 of file strings.h.