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)
	Find first (i.e.
#define	ffsl(x)
	Find first (i.e.
#define	ffs(x)
	Find first (i.e.
#define	flsll(x)
	Find last (i.e.
#define	flsl(x)
	Find last (i.e.
#define	fls(x)
	Find last (i.e.

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

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

)

Value:

        ( __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 123 of file strings.h.

#define ffsll( x ) \
        ( __builtin_constant_p ( x ) ? __constant_ffsll ( x ) : __ffsll ( x ) )

Referenced by ffsll_okx(), ffsll_var(), and usb_alloc_address().

ffsl

#define ffsl

(

x

)

Value:

        ( __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 132 of file strings.h.

#define ffsl( x ) \
        ( __builtin_constant_p ( x ) ? __constant_ffsl ( x ) : __ffsl ( x ) )

Referenced by ffsl_okx(), and ffsl_var().

ffs

#define ffs

(

x

)

Value:

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 141 of file strings.h.

Referenced by efifb_colour_map_mask(), ehci_periodic_schedule(), exanic_expired(), and uhci_periodic_schedule().

flsll

#define flsll

(

x

)

Value:

        ( __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 149 of file strings.h.

#define flsll( x ) \
        ( __builtin_constant_p ( x ) ? __constant_flsll ( x ) : __flsll ( x ) )

Referenced by flsll_okx(), flsll_var(), and profile_update().

flsl

#define flsl

(

x

)

Value:

        ( __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 158 of file strings.h.

#define flsl( x ) \
        ( __builtin_constant_p ( x ) ? __constant_flsl ( x ) : __flsl ( x ) )

Referenced by flsl_okx(), flsl_var(), ipv6_match_len(), profile_update(), and slam_put_value().

fls

#define fls

(

x

)

Value:

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 167 of file strings.h.

Referenced by alloc_iob_raw(), arbel_alloc_icm(), arbel_create_cq(), arbel_create_eq(), arbel_create_qp(), arbel_map_vpm(), ath5k_hw_write_ofdm_timings(), efifb_colour_map_mask(), ehci_align(), hermon_create_cq(), hermon_create_eq(), hermon_create_qp(), hermon_map_icm(), hermon_map_vpm(), hermon_unmap_icm(), icm_align(), icm_align(), ilog2(), ioremap_pages(), mlx_utils_ilog2_priv(), nii_io(), xengrant_init(), xhci_align(), and xhci_endpoint_open().

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

FILE_SECBOOT()

FILE_SECBOOT

(

PERMITTED

)

__attribute__()

__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 22 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

)

References x.

__ffsl()

int __ffsl

(

long

x

)

References x.

__flsll()

int __flsll

(

long long

x

)

References x.

__flsl()

int __flsl

(

long

x

)

References 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 209 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 222 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 177 of file strings.h.

len

size_t len

Initial value:

{
        memmove ( dest, src, len )

Definition at line 177 of file strings.h.