nmdb/be-null.c

   1
   2 #if BE_ENABLE_NULL
   3
   4 #include <stddef.h>     /* size_t */
   5 #include <stdlib.h>     /* malloc() and friends */
   6 #include "be.h"
   7
   8
   9 int null_set(struct db_conn *db, const unsigned char *key, size_t ksize,
  10                 unsigned char *val, size_t vsize);
  11 int null_get(struct db_conn *db, const unsigned char *key, size_t ksize,
  12                 unsigned char *val, size_t *vsize);
  13 int null_del(struct db_conn *db, const unsigned char *key, size_t ksize);
  14 int null_close(struct db_conn *db);
  15
  16
  17 struct db_conn *null_open(const char *name, int flags)
  18 {
  19         struct db_conn *db;
  20
  21         db = malloc(sizeof(struct db_conn));
  22         if (db == NULL)
  23                 return NULL;
  24
  25         db->conn = NULL;
  26         db->set = null_set;
  27         db->get = null_get;
  28         db->del = null_del;
  29         db->firstkey = NULL;
  30         db->nextkey = NULL;
  31         db->close = null_close;
  32
  33         return db;
  34 }
  35
  36
  37 int null_close(struct db_conn *db)
  38 {
  39         free(db);
  40         return 1;
  41 }
  42
  43
  44 int null_set(struct db_conn *db, const unsigned char *key, size_t ksize,
  45                 unsigned char *val, size_t vsize)
  46 {
  47         return 1;
  48 }
  49
  50
  51 int null_get(struct db_conn *db, const unsigned char *key, size_t ksize,
  52                 unsigned char *val, size_t *vsize)
  53 {
  54         return 0;
  55 }
  56
  57 int null_del(struct db_conn *db, const unsigned char *key, size_t ksize)
  58 {
  59         return 0;
  60 }
  61
  62 #else
  63
  64 #include <stddef.h>     /* NULL */
  65
  66 struct db_conn *null_open(const char *name, int flags)
  67 {
  68         return NULL;
  69 }
  70
  71 #endif
  72