Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Implementation of the symbol table type.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Author : Stephen Smalley, <sds@tycho.nsa.gov>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include "symtab.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) static unsigned int symhash(const void *key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	const char *p, *keyp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	unsigned int size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	unsigned int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	keyp = key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	size = strlen(keyp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	for (p = keyp; (p - keyp) < size; p++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 		val = (val << 4 | (val >> (8*sizeof(unsigned int)-4))) ^ (*p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	return val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static int symcmp(const void *key1, const void *key2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	const char *keyp1, *keyp2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	keyp1 = key1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	keyp2 = key2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	return strcmp(keyp1, keyp2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static const struct hashtab_key_params symtab_key_params = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	.hash = symhash,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	.cmp = symcmp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) int symtab_init(struct symtab *s, unsigned int size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	s->nprim = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	return hashtab_init(&s->table, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) int symtab_insert(struct symtab *s, char *name, void *datum)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	return hashtab_insert(&s->table, name, datum, symtab_key_params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) void *symtab_search(struct symtab *s, const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	return hashtab_search(&s->table, name, symtab_key_params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }