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54 lines
1.1 KiB
54 lines
1.1 KiB
// 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, <[email protected]> |
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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, unsigned int 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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