los_hash.h 文件参考

浏览源代码.

函数
LITE_OS_SEC_ALW_INLINE STATIC INLINE UINT32	LOS_HashFNV32aBuf (const VOID *buf, size_t len, UINT32 hval)
LITE_OS_SEC_ALW_INLINE STATIC INLINE UINT32	LOS_HashFNV32aStr (CHAR *str, UINT32 hval)

函数说明

LOS_HashFNV32aBuf()

LITE_OS_SEC_ALW_INLINE STATIC INLINE UINT32 LOS_HashFNV32aBuf	(	const VOID *	buf,
		size_t	len,
		UINT32	hval
	)

在文件 los_hash.h 第 79 行定义.

{
    const UINT8 *hashbuf = (const UINT8 *)buf;
 
    /*
     * FNV-1a hash each octet in the buffer
     */
    while (len-- != 0) {
        /* xor the bottom with the current octet */
        hval ^= (UINT32)*hashbuf++;
 
        /* multiply by the 32 bit FNV magic prime mod 2^32 */
        hval *= FNV_32_PRIME;
    }
 
    /* return our new hash value */
    return hval;
}

这是这个函数的调用关系图:

LOS_HashFNV32aStr()

LITE_OS_SEC_ALW_INLINE STATIC INLINE UINT32 LOS_HashFNV32aStr	(	CHAR *	str,
		UINT32	hval
	)

在文件 los_hash.h 第 98 行定义.

{
    UINT8 *s = (UINT8 *)str;
 
    /*
     * FNV-1a hash each octet in the buffer
     */
    while (*s) {
        /* xor the bottom with the current octet */
        hval ^= (UINT32)*s++;
 
        /* multiply by the 32 bit FNV magic prime mod 2^32 */
        hval *= FNV_32_PRIME;
    }
 
    /* return our new hash value */
    return hval;
}