crc32c.h File Reference

Go to the source code of this file.

Functions
static u32	crc32c_le (u32 crc, const char *data, size_t length)
static void	btrfs_init_crc32c (void)

Variables
static u32	crc32c_table [256]

Function Documentation

btrfs_init_crc32c()

static void btrfs_init_crc32c ( void  )

inlinestatic

Definition at line 39 of file crc32c.h.

{
    int i, j;
    u32 v;
    const u32 poly = 0x82F63B78; /* Bit-reflected CRC32C polynomial */
 
    for (i = 0; i < 256; i++) {
        v = i;
        for (j = 0; j < 8; j++) {
            v = (v >> 1) ^ ((v & 1) ? poly : 0);
        }
        crc32c_table[i] = v;
    }
}

Referenced by BtrFsMount().

crc32c_le()

static u32 crc32c_le ( u32  crc, const char *  data, size_t  length  )

inlinestatic

Definition at line 31 of file crc32c.h.

{
    while (length--)
        crc = crc32c_table[(u8)(crc ^ *data++)] ^ (crc >> 8);
 
    return crc;
}

Variable Documentation

crc32c_table

u32 crc32c_table[256]

static

Definition at line 24 of file crc32c.h.

Referenced by btrfs_init_crc32c(), and crc32c_le().