本文整理汇总了C++中BTREE::bt_cmp方法的典型用法代码示例。如果您正苦于以下问题：C++ BTREE::bt_cmp方法的具体用法？C++ BTREE::bt_cmp怎么用？C++ BTREE::bt_cmp使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类BTREE的用法示例。
在下文中一共展示了BTREE::bt_cmp方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: btree_iternext
STATIC mp_obj_t btree_iternext(mp_obj_t self_in) {
mp_obj_btree_t *self = MP_OBJ_TO_PTR(self_in);
DBT key, val;
int res;
// Different ports may have different type sizes
mp_uint_t v;
bool desc = self->flags & FLAG_DESC;
if (self->start_key != MP_OBJ_NULL) {
int flags = R_FIRST;
if (self->start_key != mp_const_none) {
key.data = (void*)mp_obj_str_get_data(self->start_key, &v);
key.size = v;
flags = R_CURSOR;
} else if (desc) {
flags = R_LAST;
}
res = __bt_seq(self->db, &key, &val, flags);
self->start_key = MP_OBJ_NULL;
} else {
res = __bt_seq(self->db, &key, &val, desc ? R_PREV : R_NEXT);
}
if (res == RET_SPECIAL) {
return MP_OBJ_STOP_ITERATION;
}
CHECK_ERROR(res);
if (self->end_key != mp_const_none) {
DBT end_key;
end_key.data = (void*)mp_obj_str_get_data(self->end_key, &v);
end_key.size = v;
BTREE *t = self->db->internal;
int cmp = t->bt_cmp(&key, &end_key);
if (desc) {
cmp = -cmp;
}
if (self->flags & FLAG_END_KEY_INCL) {
cmp--;
}
if (cmp >= 0) {
self->end_key = MP_OBJ_NULL;
return MP_OBJ_STOP_ITERATION;
}
}
switch (self->flags & FLAG_ITER_TYPE_MASK) {
case FLAG_ITER_KEYS:
return mp_obj_new_bytes(key.data, key.size);
case FLAG_ITER_VALUES:
return mp_obj_new_bytes(val.data, val.size);
default: {
mp_obj_t pair_o = mp_obj_new_tuple(2, NULL);
mp_obj_tuple_t *pair = MP_OBJ_TO_PTR(pair_o);
pair->items[0] = mp_obj_new_bytes(key.data, key.size);
pair->items[1] = mp_obj_new_bytes(val.data, val.size);
return pair_o;
}
}
}