55 lines
1.1 KiB
C
55 lines
1.1 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Implementation of the symbol table type.
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*
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* Author : Stephen Smalley, <stephen.smalley.work@gmail.com>
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*/
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include "symtab.h"
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static unsigned int symhash(const void *key)
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{
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const char *p, *keyp;
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unsigned int size;
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unsigned int val;
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val = 0;
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keyp = key;
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size = strlen(keyp);
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for (p = keyp; (p - keyp) < size; p++)
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val = (val << 4 | (val >> (8*sizeof(unsigned int)-4))) ^ (*p);
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return val;
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}
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static int symcmp(const void *key1, const void *key2)
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{
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const char *keyp1, *keyp2;
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keyp1 = key1;
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keyp2 = key2;
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return strcmp(keyp1, keyp2);
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}
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static const struct hashtab_key_params symtab_key_params = {
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.hash = symhash,
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.cmp = symcmp,
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};
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int symtab_init(struct symtab *s, u32 size)
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{
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s->nprim = 0;
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return hashtab_init(&s->table, size);
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}
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int symtab_insert(struct symtab *s, char *name, void *datum)
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{
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return hashtab_insert(&s->table, name, datum, symtab_key_params);
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}
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void *symtab_search(struct symtab *s, const char *name)
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{
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return hashtab_search(&s->table, name, symtab_key_params);
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}
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