ex_t db_foreach(void *vhandle, db_foreach_t hook, void *userdata)
{
int ret = 0;
dbh_t *handle = vhandle;
VILLA *dbp = handle->dbp;
dbv_t dbv_key, dbv_data;
int ksiz, dsiz;
char *key, *data;
ret = vlcurfirst(dbp);
if (ret) {
while ((key = vlcurkey(dbp, &ksiz))) {
data = vlcurval(dbp, &dsiz);
if (data) {
/* switch to "dbv_t *" variables */
dbv_key.leng = ksiz;
dbv_key.data = xmalloc(dbv_key.leng+1);
memcpy(dbv_key.data, key, ksiz);
((char *)dbv_key.data)[dbv_key.leng] = '\0';
dbv_data.data = data;
dbv_data.leng = dsiz; /* read count */
/* call user function */
ret = hook(&dbv_key, &dbv_data, userdata);
xfree(dbv_key.data);
if (ret != 0)
break;
free(data); /* not xfree() as allocated by dpget() */
}
free(key); /* not xfree() as allocated by dpiternext() */
vlcurnext(dbp);
}
} else {
print_error(__FILE__, __LINE__, "(qdbm) vlcurfirst err: %d, %s",
dpecode, dperrmsg(dpecode));
exit(EX_ERROR);
}
return EX_OK;
}
std::set<ValueKey> JsonDb::Transaction::Walk()
{
std::set<ValueKey> keys;
// initialize the iterator
if(!vlcurfirst(db.get()))
throw std::runtime_error("Failed to initialize database iterator");
CharPtr key;
while((key = CharPtr(vlcurkey(db.get(), NULL))) != NULL)
{
keys.insert(*(ValueKey const *)key.get());
vlcurnext(db.get());
}
return keys;
}
