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ðŸ“ ..
ðŸ“„ aligned.h(1.11 KB)
ðŸ“„ aria_backup.h(1.51 KB)
ðŸ“„ assume_aligned.h(2.29 KB)
ðŸ“ atomic
ðŸ“„ authors.h(9.9 KB)
ðŸ“„ backup.h(1.66 KB)
ðŸ“„ bounded_queue.h(5.95 KB)
ðŸ“„ client_settings.h(1.89 KB)
ðŸ“„ compat56.h(2.23 KB)
ðŸ“„ config.h(14.23 KB)
ðŸ“„ contributors.h(4.76 KB)
ðŸ“„ create_options.h(4.42 KB)
ðŸ“„ create_tmp_table.h(2.74 KB)
ðŸ“„ cset_narrowing.h(3.88 KB)
ðŸ“„ custom_conf.h(1.06 KB)
ðŸ“„ datadict.h(1.66 KB)
ðŸ“„ ddl_log.h(12.39 KB)
ðŸ“„ debug.h(1.21 KB)
ðŸ“„ debug_sync.h(2 KB)
ðŸ“„ derived_handler.h(2.32 KB)
ðŸ“„ derror.h(980 B)
ðŸ“„ des_key_file.h(1.21 KB)
ðŸ“„ discover.h(1.53 KB)
ðŸ“„ dur_prop.h(1.06 KB)
ðŸ“„ embedded_priv.h(1.69 KB)
ðŸ“„ event_data_objects.h(4.09 KB)
ðŸ“„ event_db_repository.h(3.56 KB)
ðŸ“„ event_parse_data.h(2.83 KB)
ðŸ“„ event_queue.h(3.36 KB)
ðŸ“„ event_scheduler.h(3.21 KB)
ðŸ“„ events.h(4.59 KB)
ðŸ“„ field.h(215.25 KB)
ðŸ“„ field_comp.h(1.15 KB)
ðŸ“„ filesort.h(7.11 KB)
ðŸ“„ filesort_utils.h(8 KB)
ðŸ“„ ft_global.h(3.04 KB)
ðŸ“„ gcalc_slicescan.h(16.87 KB)
ðŸ“„ gcalc_tools.h(11.62 KB)
ðŸ“„ grant.h(2.69 KB)
ðŸ“„ group_by_handler.h(3.45 KB)
ðŸ“„ gstream.h(2.38 KB)
ðŸ“„ ha_handler_stats.h(2.28 KB)
ðŸ“„ ha_partition.h(62.9 KB)
ðŸ“„ ha_sequence.h(6.1 KB)
ðŸ“„ handle_connections_win.h(884 B)
ðŸ“„ handler.h(196.46 KB)
ðŸ“„ hash.h(4.34 KB)
ðŸ“„ hash_filo.h(5.55 KB)
ðŸ“„ heap.h(9.26 KB)
ðŸ“„ hostname.h(5.29 KB)
ðŸ“„ ilist.h(6.88 KB)
ðŸ“„ init.h(852 B)
ðŸ“„ innodb_priv.h(1.29 KB)
ðŸ“„ item.h(272.64 KB)
ðŸ“„ item_cmpfunc.h(131.86 KB)
ðŸ“„ item_create.h(11.23 KB)
ðŸ“„ item_func.h(133.45 KB)
ðŸ“„ item_geofunc.h(37.99 KB)
ðŸ“„ item_jsonfunc.h(21.99 KB)
ðŸ“„ item_row.h(5.1 KB)
ðŸ“„ item_strfunc.h(70.55 KB)
ðŸ“„ item_subselect.h(57.77 KB)
ðŸ“„ item_sum.h(70.59 KB)
ðŸ“„ item_timefunc.h(63.1 KB)
ðŸ“„ item_vers.h(4.23 KB)
ðŸ“„ item_windowfunc.h(33.51 KB)
ðŸ“„ item_xmlfunc.h(4.5 KB)
ðŸ“„ json_table.h(9.28 KB)
ðŸ“„ key.h(2.08 KB)
ðŸ“„ keycaches.h(1.95 KB)
ðŸ“„ lex.h(29.13 KB)
ðŸ“„ lex_string.h(3.97 KB)
ðŸ“„ lex_symbol.h(1.29 KB)
ðŸ“„ lf.h(6.31 KB)
ðŸ“„ lock.h(2.15 KB)
ðŸ“„ log.h(45 KB)
ðŸ“„ log_event.h(182.04 KB)
ðŸ“„ log_event_data_type.h(1.85 KB)
ðŸ“„ log_event_old.h(19.37 KB)
ðŸ“„ log_slow.h(2.38 KB)
ðŸ“„ maria.h(5.73 KB)
ðŸ“„ mariadb.h(1.25 KB)
ðŸ“„ mdl.h(37.57 KB)
ðŸ“„ mem_root_array.h(6.94 KB)
ðŸ“„ message.h(1.17 KB)
ðŸ“„ multi_range_read.h(22.64 KB)
ðŸ“„ my_alarm.h(2.37 KB)
ðŸ“„ my_apc.h(4.64 KB)
ðŸ“„ my_atomic.h(7.11 KB)
ðŸ“„ my_atomic_wrapper.h(2.98 KB)
ðŸ“„ my_base.h(26.57 KB)
ðŸ“„ my_bit.h(6.05 KB)
ðŸ“„ my_bitmap.h(5.74 KB)
ðŸ“„ my_check_opt.h(2.56 KB)
ðŸ“„ my_compare.h(10.93 KB)
ðŸ“„ my_counter.h(1.68 KB)
ðŸ“„ my_cpu.h(4.74 KB)
ðŸ“„ my_crypt.h(904 B)
ðŸ“„ my_decimal.h(14.15 KB)
ðŸ“„ my_default.h(1.84 KB)
ðŸ“„ my_handler_errors.h(4.77 KB)
ðŸ“„ my_json_writer.h(17.95 KB)
ðŸ“„ my_libwrap.h(1.16 KB)
ðŸ“„ my_md5.h(1.45 KB)
ðŸ“„ my_minidump.h(848 B)
ðŸ“„ my_nosys.h(1.4 KB)
ðŸ“„ my_rdtsc.h(8.23 KB)
ðŸ“„ my_rnd.h(1.04 KB)
ðŸ“„ my_service_manager.h(2 KB)
ðŸ“„ my_stack_alloc.h(6.34 KB)
ðŸ“„ my_stacktrace.h(3.14 KB)
ðŸ“„ my_time.h(10.22 KB)
ðŸ“„ my_tree.h(3.9 KB)
ðŸ“„ my_uctype.h(67.9 KB)
ðŸ“„ my_user.h(1.1 KB)
ðŸ“„ myisam.h(17.1 KB)
ðŸ“„ myisamchk.h(4.61 KB)
ðŸ“„ myisammrg.h(4.78 KB)
ðŸ“„ myisampack.h(14.58 KB)
ðŸ“„ mysqld.h(39.55 KB)
ðŸ“„ mysqld_default_groups.h(204 B)
ðŸ“„ mysqld_suffix.h(1.17 KB)
ðŸ“„ mysys_err.h(2.95 KB)
ðŸ“„ opt_range.h(58.19 KB)
ðŸ“„ opt_subselect.h(14.21 KB)
ðŸ“„ opt_trace.h(8.29 KB)
ðŸ“„ opt_trace_context.h(3.21 KB)
ðŸ“„ parse_file.h(4.28 KB)
ðŸ“„ partition_element.h(5.09 KB)
ðŸ“„ partition_info.h(18.85 KB)
ðŸ“„ password.h(1.14 KB)
ðŸ“„ pfs_file_provider.h(3.08 KB)
ðŸ“„ pfs_idle_provider.h(1.35 KB)
ðŸ“„ pfs_memory_provider.h(1.59 KB)
ðŸ“„ pfs_metadata_provider.h(1.85 KB)
ðŸ“„ pfs_socket_provider.h(2.21 KB)
ðŸ“„ pfs_stage_provider.h(1.52 KB)
ðŸ“„ pfs_statement_provider.h(4.25 KB)
ðŸ“„ pfs_table_provider.h(2.56 KB)
ðŸ“„ pfs_thread_provider.h(5.43 KB)
ðŸ“„ pfs_transaction_provider.h(2.78 KB)
ðŸ“„ privilege.h(27.97 KB)
ðŸ“„ probes_mysql.h(973 B)
ðŸ“„ probes_mysql_dtrace.h(32.23 KB)
ðŸ“„ probes_mysql_nodtrace.h(4.89 KB)
ðŸ“„ procedure.h(6.63 KB)
ðŸ“„ protocol.h(12.2 KB)
ðŸ“„ proxy_protocol.h(548 B)
ðŸ“„ queues.h(3.4 KB)
ðŸ“„ records.h(3.07 KB)
ðŸ“„ repl_failsafe.h(1.55 KB)
ðŸ“„ replication.h(15.73 KB)
ðŸ“„ rijndael.h(1.67 KB)
ðŸ“„ rowid_filter.h(15.11 KB)
ðŸ“„ rpl_constants.h(3.28 KB)
ðŸ“„ rpl_filter.h(4.43 KB)
ðŸ“„ rpl_gtid.h(13.36 KB)
ðŸ“„ rpl_injector.h(9.4 KB)
ðŸ“„ rpl_mi.h(14.64 KB)
ðŸ“„ rpl_parallel.h(17.05 KB)
ðŸ“„ rpl_record.h(1.55 KB)
ðŸ“„ rpl_record_old.h(1.37 KB)
ðŸ“„ rpl_reporting.h(3.63 KB)
ðŸ“„ rpl_rli.h(31.98 KB)
ðŸ“„ rpl_tblmap.h(3.1 KB)
ðŸ“„ rpl_utility.h(9.4 KB)
ðŸ“„ scheduler.h(3.12 KB)
ðŸ“„ scope.h(4.29 KB)
ðŸ“„ select_handler.h(2.18 KB)
ðŸ“„ semisync.h(2.23 KB)
ðŸ“„ semisync_master.h(24.96 KB)
ðŸ“„ semisync_master_ack_receiver.h(8.5 KB)
ðŸ“„ semisync_slave.h(3.65 KB)
ðŸ“„ service_versions.h(2 KB)
ðŸ“„ session_tracker.h(13.94 KB)
ðŸ“„ set_var.h(16.16 KB)
ðŸ“„ slave.h(11.99 KB)
ðŸ“„ socketpair.h(842 B)
ðŸ“„ source_revision.h(67 B)
ðŸ“„ sp.h(22.06 KB)
ðŸ“„ sp_cache.h(2 KB)
ðŸ“„ sp_head.h(63 KB)
ðŸ“„ sp_pcontext.h(24.31 KB)
ðŸ“„ sp_rcontext.h(14 KB)
ðŸ“„ span.h(3.84 KB)
ðŸ“„ spatial.h(21.78 KB)
ðŸ“„ sql_acl.h(13.8 KB)
ðŸ“„ sql_admin.h(2.85 KB)
ðŸ“„ sql_alloc.h(1.69 KB)
ðŸ“„ sql_alter.h(14.92 KB)
ðŸ“„ sql_analyse.h(10.86 KB)
ðŸ“„ sql_analyze_stmt.h(12.38 KB)
ðŸ“„ sql_array.h(6.71 KB)
ðŸ“„ sql_audit.h(13.62 KB)
ðŸ“„ sql_base.h(25.27 KB)
ðŸ“„ sql_basic_types.h(9.3 KB)
ðŸ“„ sql_binlog.h(895 B)
ðŸ“„ sql_bitmap.h(7.66 KB)
ðŸ“„ sql_bootstrap.h(1.77 KB)
ðŸ“„ sql_cache.h(21.17 KB)
ðŸ“„ sql_callback.h(1.51 KB)
ðŸ“„ sql_class.h(261.11 KB)
ðŸ“„ sql_cmd.h(9.2 KB)
ðŸ“„ sql_connect.h(3.99 KB)
ðŸ“„ sql_const.h(10.96 KB)
ðŸ“„ sql_crypt.h(1.4 KB)
ðŸ“„ sql_cte.h(16.15 KB)
ðŸ“„ sql_cursor.h(2.26 KB)
ðŸ“„ sql_db.h(2.38 KB)
ðŸ“„ sql_debug.h(5.51 KB)
ðŸ“„ sql_delete.h(1.31 KB)
ðŸ“„ sql_derived.h(1.26 KB)
ðŸ“„ sql_digest.h(3.73 KB)
ðŸ“„ sql_digest_stream.h(1.53 KB)
ðŸ“„ sql_do.h(954 B)
ðŸ“„ sql_error.h(38.66 KB)
ðŸ“„ sql_explain.h(28.34 KB)
ðŸ“„ sql_expression_cache.h(4.26 KB)
ðŸ“„ sql_get_diagnostics.h(7.68 KB)
ðŸ“„ sql_handler.h(2.84 KB)
ðŸ“„ sql_help.h(995 B)
ðŸ“„ sql_hset.h(3.32 KB)
ðŸ“„ sql_i_s.h(8.04 KB)
ðŸ“„ sql_insert.h(2.59 KB)
ðŸ“„ sql_join_cache.h(47.53 KB)
ðŸ“„ sql_lex.h(168.5 KB)
ðŸ“„ sql_lifo_buffer.h(9.45 KB)
ðŸ“„ sql_limit.h(3.11 KB)
ðŸ“„ sql_list.h(21.93 KB)
ðŸ“„ sql_load.h(1.25 KB)
ðŸ“„ sql_locale.h(2.64 KB)
ðŸ“„ sql_manager.h(960 B)
ðŸ“„ sql_mode.h(6.58 KB)
ðŸ“„ sql_parse.h(8.43 KB)
ðŸ“„ sql_partition.h(11.79 KB)
ðŸ“„ sql_partition_admin.h(5.8 KB)
ðŸ“„ sql_plist.h(7.55 KB)
ðŸ“„ sql_plugin.h(7.37 KB)
ðŸ“„ sql_plugin_compat.h(2.18 KB)
ðŸ“„ sql_prepare.h(11.14 KB)
ðŸ“„ sql_priv.h(18.16 KB)
ðŸ“„ sql_profile.h(7.63 KB)
ðŸ“„ sql_reload.h(1.01 KB)
ðŸ“„ sql_rename.h(982 B)
ðŸ“„ sql_repl.h(2.97 KB)
ðŸ“„ sql_schema.h(3.23 KB)
ðŸ“„ sql_select.h(86.81 KB)
ðŸ“„ sql_sequence.h(5.06 KB)
ðŸ“„ sql_servers.h(1.74 KB)
ðŸ“„ sql_show.h(9.39 KB)
ðŸ“„ sql_signal.h(3.28 KB)
ðŸ“„ sql_sort.h(21.45 KB)
ðŸ“„ sql_statistics.h(12.16 KB)
ðŸ“„ sql_string.h(38.84 KB)
ðŸ“„ sql_table.h(9.39 KB)
ðŸ“„ sql_tablespace.h(956 B)
ðŸ“„ sql_test.h(1.55 KB)
ðŸ“„ sql_time.h(8.18 KB)
ðŸ“„ sql_trigger.h(12.04 KB)
ðŸ“„ sql_truncate.h(2.03 KB)
ðŸ“„ sql_tvc.h(2.36 KB)
ðŸ“„ sql_type.h(288.51 KB)
ðŸ“„ sql_type_fixedbin.h(62.81 KB)
ðŸ“„ sql_type_fixedbin_storage.h(5.34 KB)
ðŸ“„ sql_type_geom.h(18.64 KB)
ðŸ“„ sql_type_int.h(9.77 KB)
ðŸ“„ sql_type_json.h(6.01 KB)
ðŸ“„ sql_type_real.h(1.23 KB)
ðŸ“„ sql_type_string.h(1.59 KB)
ðŸ“„ sql_udf.h(4.74 KB)
ðŸ“„ sql_union.h(1.04 KB)
ðŸ“„ sql_update.h(1.88 KB)
ðŸ“„ sql_view.h(2.41 KB)
ðŸ“„ sql_window.h(6.65 KB)
ðŸ“„ ssl_compat.h(3.07 KB)
ðŸ“„ strfunc.h(2.22 KB)
ðŸ“„ structs.h(25.76 KB)
ðŸ“„ sys_vars_shared.h(2.67 KB)
ðŸ“„ t_ctype.h(5.51 KB)
ðŸ“„ table.h(113.03 KB)
ðŸ“„ table_cache.h(4.13 KB)
ðŸ“„ thr_alarm.h(2.86 KB)
ðŸ“„ thr_lock.h(7.18 KB)
ðŸ“„ thr_malloc.h(1.17 KB)
ðŸ“„ thr_timer.h(1.53 KB)
ðŸ“„ thread_cache.h(5.77 KB)
ðŸ“„ threadpool.h(4.7 KB)
ðŸ“„ threadpool_generic.h(3.88 KB)
ðŸ“„ threadpool_winsockets.h(2.24 KB)
ðŸ“„ transaction.h(1.43 KB)
ðŸ“„ tzfile.h(4.9 KB)
ðŸ“„ tztime.h(3.32 KB)
ðŸ“„ uniques.h(4.12 KB)
ðŸ“„ unireg.h(7.54 KB)
ðŸ“„ vers_string.h(2.47 KB)
ðŸ“„ violite.h(9.85 KB)
ðŸ“„ waiting_threads.h(4.43 KB)
ðŸ“„ welcome_copyright_notice.h(1.19 KB)
ðŸ“„ win_tzname_data.h(6.35 KB)
ðŸ“„ winservice.h(1.17 KB)
ðŸ“„ wqueue.h(1.53 KB)
ðŸ“„ wsrep.h(3.23 KB)
ðŸ“„ wsrep_applier.h(2.64 KB)
ðŸ“„ wsrep_binlog.h(3.36 KB)
ðŸ“„ wsrep_client_service.h(2.5 KB)
ðŸ“„ wsrep_client_state.h(1.53 KB)
ðŸ“„ wsrep_condition_variable.h(1.45 KB)
ðŸ“„ wsrep_high_priority_service.h(4.8 KB)
ðŸ“„ wsrep_mutex.h(1.19 KB)
ðŸ“„ wsrep_mysqld.h(20.64 KB)
ðŸ“„ wsrep_mysqld_c.h(1.2 KB)
ðŸ“„ wsrep_on.h(1.68 KB)
ðŸ“„ wsrep_priv.h(1.6 KB)
ðŸ“„ wsrep_schema.h(4.83 KB)
ðŸ“„ wsrep_server_service.h(3.55 KB)
ðŸ“„ wsrep_server_state.h(2.23 KB)
ðŸ“„ wsrep_sst.h(3.86 KB)
ðŸ“„ wsrep_storage_service.h(1.77 KB)
ðŸ“„ wsrep_thd.h(10.9 KB)
ðŸ“„ wsrep_trans_observer.h(17.69 KB)
ðŸ“„ wsrep_types.h(997 B)
ðŸ“„ wsrep_utils.h(9.07 KB)
ðŸ“„ wsrep_var.h(4.5 KB)
ðŸ“„ wsrep_xid.h(1.51 KB)
ðŸ“„ xa.h(1.8 KB)

Editing: sql_type_int.h

This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1335  USA */

#ifndef SQL_TYPE_INT_INCLUDED
#define SQL_TYPE_INT_INCLUDED

#include "my_bit.h" // my_count_bits()

class Null_flag
{
protected:
  bool m_is_null;
public:
  bool is_null() const { return m_is_null; }
  Null_flag(bool is_null) :m_is_null(is_null) { }
};

class Longlong
{
protected:
  longlong m_value;
public:
  longlong value() const { return m_value; }
  Longlong(longlong nr) :m_value(nr) { }
  ulonglong abs()
  {
    if (m_value == LONGLONG_MIN) // avoid undefined behavior
      return ((ulonglong) LONGLONG_MAX) + 1;
    return m_value < 0 ? -m_value : m_value;
  }
};

class Longlong_null: public Longlong, public Null_flag
{
public:
  Longlong_null(longlong nr, bool is_null)
   :Longlong(nr), Null_flag(is_null)
  { }
  explicit Longlong_null()
   :Longlong(0), Null_flag(true)
  { }
  explicit Longlong_null(longlong nr)
   :Longlong(nr), Null_flag(false)
  { }
  Longlong_null operator|(const Longlong_null &other) const
  {
    if (is_null() || other.is_null())
      return Longlong_null();
    return Longlong_null(value() | other.value());
  }
  Longlong_null operator&(const Longlong_null &other) const
  {
    if (is_null() || other.is_null())
      return Longlong_null();
    return Longlong_null(value() & other.value());
  }
  Longlong_null operator^(const Longlong_null &other) const
  {
    if (is_null() || other.is_null())
      return Longlong_null();
    return Longlong_null((longlong) (value() ^ other.value()));
  }
  Longlong_null operator~() const
  {
    if (is_null())
      return *this;
    return Longlong_null((longlong) ~ (ulonglong) value());
  }
  Longlong_null operator<<(const Longlong_null &llshift) const
  {
    ulonglong res;
    uint shift;
    if (is_null() || llshift.is_null())
      return Longlong_null();
    shift= (uint) llshift.value();
    res= 0;
    if (shift < sizeof(longlong) * 8)
      res= ((ulonglong) value()) << shift;
    return Longlong_null((longlong) res);
  }
  Longlong_null operator>>(const Longlong_null &llshift) const
  {
    ulonglong res;
    uint shift;
    if (is_null() || llshift.is_null())
      return Longlong_null();
    shift= (uint) llshift.value();
    res= 0;
    if (shift < sizeof(longlong) * 8)
      res= ((ulonglong) value()) >> shift;
    return Longlong_null(res);
  }
  Longlong_null bit_count() const
  {
    if (is_null())
      return *this;
    return Longlong_null((longlong) my_count_bits((ulonglong) value()));
  }
};

class ULonglong
{
protected:
  ulonglong m_value;
public:
  ulonglong value() const { return m_value; }
  explicit ULonglong(ulonglong nr) :m_value(nr) { }

static bool test_if_sum_overflows_ull(ulonglong arg1, ulonglong arg2)
  {
    return ULONGLONG_MAX - arg1 < arg2;
  }

Longlong_null operator-() const
  {
    if (m_value > (ulonglong) LONGLONG_MAX) // Avoid undefined behaviour
    {
      return m_value == (ulonglong) LONGLONG_MAX + 1 ?
             Longlong_null(LONGLONG_MIN, false) :
             Longlong_null(0, true);
    }
    return Longlong_null(-(longlong) m_value, false);
  }

// Convert to Longlong_null with the range check
  Longlong_null to_longlong_null() const
  {
    if (m_value > (ulonglong) LONGLONG_MAX)
      return Longlong_null(0, true);
    return Longlong_null((longlong) m_value, false);
  }

};

class ULonglong_null: public ULonglong, public Null_flag
{
public:
  ULonglong_null(ulonglong nr, bool is_null)
   :ULonglong(nr), Null_flag(is_null)
  { }

/*
    Multiply two ulonglong values.

Let a = a1 * 2^32 + a0 and b = b1 * 2^32 + b0. Then
    a * b = (a1 * 2^32 + a0) * (b1 * 2^32 + b0) = a1 * b1 * 2^64 +
            + (a1 * b0 + a0 * b1) * 2^32 + a0 * b0;
    We can determine if the above sum overflows the ulonglong range by
    sequentially checking the following conditions:
    1. If both a1 and b1 are non-zero.
    2. Otherwise, if (a1 * b0 + a0 * b1) is greater than ULONG_MAX.
    3. Otherwise, if (a1 * b0 + a0 * b1) * 2^32 + a0 * b0 is greater than
    ULONGLONG_MAX.
  */
  static ULonglong_null ullmul(ulonglong a, ulonglong b)
  {
    ulong a1= (ulong)(a >> 32);
    ulong b1= (ulong)(b >> 32);

if (a1 && b1)
      return ULonglong_null(0, true);

ulong a0= (ulong)(0xFFFFFFFFUL & a);
    ulong b0= (ulong)(0xFFFFFFFFUL & b);

ulonglong res1= (ulonglong) a1 * b0 + (ulonglong) a0 * b1;
    if (res1 > 0xFFFFFFFFUL)
      return ULonglong_null(0, true);

res1= res1 << 32;
    ulonglong res0= (ulonglong) a0 * b0;

if (test_if_sum_overflows_ull(res1, res0))
      return ULonglong_null(0, true);
    return ULonglong_null(res1 + res0, false);
  }
};

// A longlong/ulonglong hybrid. Good to store results of val_int().
class Longlong_hybrid: public Longlong
{
protected:
  bool m_unsigned;
  int cmp_signed(const Longlong_hybrid& other) const
  {
    return m_value < other.m_value ? -1 : m_value == other.m_value ? 0 : 1;
  }
  int cmp_unsigned(const Longlong_hybrid& other) const
  {
    return (ulonglong) m_value < (ulonglong) other.m_value ? -1 :
            m_value == other.m_value ? 0 : 1;
  }
public:
  Longlong_hybrid(longlong nr, bool unsigned_flag)
   :Longlong(nr), m_unsigned(unsigned_flag)
  { }
  bool is_unsigned() const { return m_unsigned; }
  bool is_unsigned_outside_of_signed_range() const
  {
    return m_unsigned && ((ulonglong) m_value) > (ulonglong) LONGLONG_MAX;
  }
  bool neg() const { return m_value < 0 && !m_unsigned; }
  ulonglong abs() const
  {
    if (m_unsigned)
      return (ulonglong) m_value;
    return Longlong(m_value).abs();
  }
  /*
    Convert to an unsigned number:
    - Negative numbers are converted to 0.
    - Positive numbers bigger than upper_bound are converted to upper_bound.
    - Other numbers are returned as is.
  */
  ulonglong to_ulonglong(ulonglong upper_bound) const
  {
    return neg() ? 0 :
           (ulonglong) m_value > upper_bound ? upper_bound :
           (ulonglong) m_value;
  }
  uint to_uint(uint upper_bound) const
  {
    return (uint) to_ulonglong(upper_bound);
  }

Longlong_null val_int_signed() const
  {
    if (m_unsigned)
      return ULonglong((ulonglong) m_value).to_longlong_null();
    return Longlong_null(m_value, false);
  }

Longlong_null val_int_unsigned() const
  {
    if (!m_unsigned && m_value < 0)
      return Longlong_null(0, true);
    return Longlong_null(m_value, false);
  }

/*
    Return in Item compatible val_int() format:
    - signed numbers as a straight longlong value
    - unsigned numbers as a ulonglong value reinterpreted to longlong
  */
  Longlong_null val_int(bool want_unsigned_value) const
  {
    return want_unsigned_value ? val_int_unsigned() :
                                 val_int_signed();
  }

int cmp(const Longlong_hybrid& other) const
  {
    if (m_unsigned == other.m_unsigned)
      return m_unsigned ? cmp_unsigned(other) : cmp_signed(other);
    if (is_unsigned_outside_of_signed_range())
      return 1;
    if (other.is_unsigned_outside_of_signed_range())
      return -1;
    /*
      The unsigned argument is in the range 0..LONGLONG_MAX.
      The signed argument is in the range LONGLONG_MIN..LONGLONG_MAX.
      Safe to compare as signed.
    */
    return cmp_signed(other);
  }
  bool operator==(const Longlong_hybrid &nr) const
  {
    return cmp(nr) == 0;
  }
  bool operator==(ulonglong nr) const
  {
    return cmp(Longlong_hybrid((longlong) nr, true)) == 0;
  }
  bool operator==(uint nr) const
  {
    return cmp(Longlong_hybrid((longlong) nr, true)) == 0;
  }
  bool operator==(longlong nr) const
  {
    return cmp(Longlong_hybrid(nr, false)) == 0;
  }
  bool operator==(int nr) const
  {
    return cmp(Longlong_hybrid(nr, false)) == 0;
  }
};

class Longlong_hybrid_null: public Longlong_hybrid,
                            public Null_flag
{
public:
  Longlong_hybrid_null(const Longlong_null &nr, bool unsigned_flag)
   :Longlong_hybrid(nr.value(), unsigned_flag),
    Null_flag(nr.is_null())
  { }
};

/*
  Stores the absolute value of a number, and the sign.
  Value range: -ULONGLONG_MAX .. +ULONGLONG_MAX.

Provides a wider range for negative numbers than Longlong_hybrid does.
  Usefull to store intermediate results of an expression whose value
  is further needed to be negated. For example, these methods:
    - Item_func_mul::int_op()
    - Item_func_int_div::val_int()
    - Item_func_mod::int_op()
  calculate the result of absolute values of the arguments,
  then optionally negate the result.
*/
class ULonglong_hybrid: public ULonglong
{
  bool m_neg;
public:
  ULonglong_hybrid(ulonglong value, bool neg)
   :ULonglong(value), m_neg(neg)
  {
    if (m_neg && !m_value)
      m_neg= false;        // convert -0 to +0
  }
  Longlong_null val_int_unsigned() const
  {
    return m_neg ? Longlong_null(0, true) :
                   Longlong_null((longlong) m_value, false);
  }
  Longlong_null val_int_signed() const
  {
    return m_neg ? -ULonglong(m_value) : ULonglong::to_longlong_null();
  }

#endif // SQL_TYPE_INT_INCLUDED

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