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

   1 /* Licensed under LGPLv2.1+ - see LICENSE file for details */
   2 #include <ccan/jbitset/jbitset.h>
   3 #include <ccan/build_assert/build_assert.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6
   7 struct jbitset *jbit_new(void)
   8 {
   9         struct jbitset *set;
  10
  11         /* Judy uses Word_t, we use unsigned long directly. */
  12         BUILD_ASSERT(sizeof(unsigned long) == sizeof(Word_t));
  13         /* We pack pointers into jbitset (in jbitset_type.h) */
  14         BUILD_ASSERT(sizeof(Word_t) >= sizeof(void *));
  15
  16         set = malloc(sizeof(*set));
  17         if (set) {
  18                 set->judy = NULL;
  19                 memset(&set->err, 0, sizeof(set->err));
  20                 set->errstr = NULL;
  21         }
  22         return set;
  23 }
  24
  25 const char *jbit_error_(struct jbitset *set)
  26 {
  27         char *str;
  28         free((char *)set->errstr);
  29         set->errstr = str = malloc(100);
  30         if (!set->errstr)
  31                 return "out of memory";
  32
  33         sprintf(str,
  34                 "JU_ERRNO_* == %d, ID == %d\n",
  35                 JU_ERRNO(&set->err), JU_ERRID(&set->err));
  36         return str;
  37 }
  38
  39 void jbit_free(const struct jbitset *set)
  40 {
  41         free((char *)set->errstr);
  42         Judy1FreeArray((PPvoid_t)&set->judy, PJE0);
  43         free((void *)set);
  44 }