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kernel/linux-imx6_3.14.28/security/selinux/ss/symtab.c 850 Bytes
6b13f685e   김민수   BSP 최초 추가
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  /*
   * Implementation of the symbol table type.
   *
   * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
   */
  #include <linux/kernel.h>
  #include <linux/string.h>
  #include <linux/errno.h>
  #include "symtab.h"
  
  static unsigned int symhash(struct hashtab *h, const void *key)
  {
  	const char *p, *keyp;
  	unsigned int size;
  	unsigned int val;
  
  	val = 0;
  	keyp = key;
  	size = strlen(keyp);
  	for (p = keyp; (p - keyp) < size; p++)
  		val = (val << 4 | (val >> (8*sizeof(unsigned int)-4))) ^ (*p);
  	return val & (h->size - 1);
  }
  
  static int symcmp(struct hashtab *h, const void *key1, const void *key2)
  {
  	const char *keyp1, *keyp2;
  
  	keyp1 = key1;
  	keyp2 = key2;
  	return strcmp(keyp1, keyp2);
  }
  
  
  int symtab_init(struct symtab *s, unsigned int size)
  {
  	s->table = hashtab_create(symhash, symcmp, size);
  	if (!s->table)
  		return -ENOMEM;
  	s->nprim = 0;
  	return 0;
  }