git.ozlabs.org Git - ccan/blob - ccan/jbitset/jbitset.c

   1 #include <ccan/jbitset/jbitset.h>
   2 #include <ccan/build_assert/build_assert.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5
   6 struct jbitset *jbit_new(void)
   7 {
   8         struct jbitset *set;
   9
  10         /* Judy uses Word_t, we use unsigned long directly. */
  11         BUILD_ASSERT(sizeof(unsigned long) == sizeof(Word_t));
  12         /* We pack pointers into jbitset (in jbitset_type.h) */
  13         BUILD_ASSERT(sizeof(Word_t) >= sizeof(void *));
  14
  15         set = malloc(sizeof(*set));
  16         if (set) {
  17                 set->judy = NULL;
  18                 memset(&set->err, 0, sizeof(set->err));
  19                 set->errstr = NULL;
  20         }
  21         return set;
  22 }
  23
  24 const char *jbit_error_(struct jbitset *set)
  25 {
  26         char *str;
  27         free((char *)set->errstr);
  28         set->errstr = str = malloc(100);
  29         if (!set->errstr)
  30                 return "out of memory";
  31
  32         sprintf(str,
  33                 "JU_ERRNO_* == %d, ID == %d\n",
  34                 JU_ERRNO(&set->err), JU_ERRID(&set->err));
  35         return str;
  36 }
  37
  38 void jbit_free(const struct jbitset *set)
  39 {
  40         free((char *)set->errstr);
  41         Judy1FreeArray((PPvoid_t)&set->judy, PJE0);
  42         free((void *)set);
  43 }