Gecko [ www.finalhopeacademy.com ]

Name	Size	Permission
atomic	[ DIR ]	drwxr-xr-x
aria_backup.h	1.38 KB	-rw-r--r--
authors.h	9.59 KB	-rw-r--r--
backup.h	1.21 KB	-rw-r--r--
bounded_queue.h	6.58 KB	-rw-r--r--
client_settings.h	1.89 KB	-rw-r--r--
compat56.h	2.23 KB	-rw-r--r--
config.h	14.33 KB	-rw-r--r--
contributors.h	2.92 KB	-rw-r--r--
create_options.h	4.26 KB	-rw-r--r--
custom_conf.h	1.06 KB	-rw-r--r--
datadict.h	1.61 KB	-rw-r--r--
debug_sync.h	1.71 KB	-rw-r--r--
derived_handler.h	2.32 KB	-rw-r--r--
derror.h	980 B	-rw-r--r--
des_key_file.h	1.21 KB	-rw-r--r--
discover.h	1.53 KB	-rw-r--r--
dur_prop.h	1.06 KB	-rw-r--r--
embedded_priv.h	1.47 KB	-rw-r--r--
event_data_objects.h	3.88 KB	-rw-r--r--
event_db_repository.h	3.56 KB	-rw-r--r--
event_parse_data.h	2.83 KB	-rw-r--r--
event_queue.h	3.36 KB	-rw-r--r--
event_scheduler.h	3.21 KB	-rw-r--r--
events.h	4.54 KB	-rw-r--r--
field.h	189.86 KB	-rw-r--r--
field_comp.h	1.15 KB	-rw-r--r--
filesort.h	4.7 KB	-rw-r--r--
filesort_utils.h	3.78 KB	-rw-r--r--
ft_global.h	3.04 KB	-rw-r--r--
gcalc_slicescan.h	16.87 KB	-rw-r--r--
gcalc_tools.h	11.53 KB	-rw-r--r--
group_by_handler.h	3.09 KB	-rw-r--r--
gstream.h	2.38 KB	-rw-r--r--
ha_partition.h	62.15 KB	-rw-r--r--
ha_sequence.h	5.54 KB	-rw-r--r--
handle_connections_win.h	852 B	-rw-r--r--
handler.h	178.71 KB	-rw-r--r--
hash.h	4.33 KB	-rw-r--r--
hash_filo.h	5.41 KB	-rw-r--r--
heap.h	9.23 KB	-rw-r--r--
hostname.h	5.29 KB	-rw-r--r--
ilist.h	6.84 KB	-rw-r--r--
init.h	852 B	-rw-r--r--
innodb_priv.h	1.29 KB	-rw-r--r--
item.h	248.7 KB	-rw-r--r--
item_cmpfunc.h	120.42 KB	-rw-r--r--
item_create.h	8.39 KB	-rw-r--r--
item_func.h	110.72 KB	-rw-r--r--
item_geofunc.h	28.54 KB	-rw-r--r--
item_inetfunc.h	6.56 KB	-rw-r--r--
item_jsonfunc.h	13.63 KB	-rw-r--r--
item_row.h	5.02 KB	-rw-r--r--
item_strfunc.h	58.95 KB	-rw-r--r--
item_subselect.h	52.43 KB	-rw-r--r--
item_sum.h	63.56 KB	-rw-r--r--
item_timefunc.h	53.89 KB	-rw-r--r--
item_vers.h	3.63 KB	-rw-r--r--
item_windowfunc.h	30.7 KB	-rw-r--r--
item_xmlfunc.h	3.37 KB	-rw-r--r--
key.h	2 KB	-rw-r--r--
keycaches.h	1.95 KB	-rw-r--r--
lex.h	28.37 KB	-rw-r--r--
lex_hash.h	138.65 KB	-rw-r--r--
lex_string.h	2.07 KB	-rw-r--r--
lex_symbol.h	1.29 KB	-rw-r--r--
lex_token.h	41.28 KB	-rw-r--r--
lf.h	6.31 KB	-rw-r--r--
lock.h	2.16 KB	-rw-r--r--
log.h	43.43 KB	-rw-r--r--
log_event.h	160.18 KB	-rw-r--r--
log_event_old.h	19.2 KB	-rw-r--r--
log_slow.h	1.98 KB	-rw-r--r--
maria.h	17.38 KB	-rw-r--r--
mariadb.h	1.25 KB	-rw-r--r--
mdl.h	36.08 KB	-rw-r--r--
mem_root_array.h	6.94 KB	-rw-r--r--
message.h	1.17 KB	-rw-r--r--
multi_range_read.h	22.5 KB	-rw-r--r--
my_alarm.h	2.35 KB	-rw-r--r--
my_apc.h	4.62 KB	-rw-r--r--
my_atomic.h	7.11 KB	-rw-r--r--
my_atomic_wrapper.h	2.8 KB	-rw-r--r--
my_base.h	26.27 KB	-rw-r--r--
my_bit.h	3.44 KB	-rw-r--r--
my_bitmap.h	6.07 KB	-rw-r--r--
my_check_opt.h	2.56 KB	-rw-r--r--
my_compare.h	10.93 KB	-rw-r--r--
my_context.h	6.59 KB	-rw-r--r--
my_counter.h	1.68 KB	-rw-r--r--
my_cpu.h	4.01 KB	-rw-r--r--
my_crypt.h	904 B	-rw-r--r--
my_decimal.h	13.09 KB	-rw-r--r--
my_default.h	2.47 KB	-rw-r--r--
my_handler_errors.h	4.73 KB	-rw-r--r--
my_json_writer.h	17.11 KB	-rw-r--r--
my_libwrap.h	1.16 KB	-rw-r--r--
my_md5.h	1.45 KB	-rw-r--r--
my_minidump.h	848 B	-rw-r--r--
my_nosys.h	1.4 KB	-rw-r--r--
my_rdtsc.h	7.76 KB	-rw-r--r--
my_rnd.h	1.04 KB	-rw-r--r--
my_service_manager.h	1.47 KB	-rw-r--r--
my_stacktrace.h	2.99 KB	-rw-r--r--
my_time.h	10.22 KB	-rw-r--r--
my_tree.h	3.9 KB	-rw-r--r--
my_uctype.h	67.9 KB	-rw-r--r--
my_user.h	1.1 KB	-rw-r--r--
myisam.h	16.92 KB	-rw-r--r--
myisamchk.h	4.77 KB	-rw-r--r--
myisammrg.h	4.66 KB	-rw-r--r--
myisampack.h	14.58 KB	-rw-r--r--
mysql_async.h	1.77 KB	-rw-r--r--
mysqld.h	32.14 KB	-rw-r--r--
mysqld_default_groups.h	204 B	-rw-r--r--
mysqld_suffix.h	1.17 KB	-rw-r--r--
mysys_err.h	2.81 KB	-rw-r--r--
nt_servc.h	2.94 KB	-rw-r--r--
opt_range.h	54.69 KB	-rw-r--r--
opt_subselect.h	14.16 KB	-rw-r--r--
opt_trace.h	8.11 KB	-rw-r--r--
opt_trace_context.h	3.21 KB	-rw-r--r--
parse_file.h	4.12 KB	-rw-r--r--
partition_element.h	5.09 KB	-rw-r--r--
partition_info.h	16.77 KB	-rw-r--r--
password.h	1.14 KB	-rw-r--r--
pcre.h	30.97 KB	-rw-r--r--
probes_mysql.h	973 B	-rw-r--r--
probes_mysql_dtrace.h	32.23 KB	-rw-r--r--
probes_mysql_nodtrace.h	4.89 KB	-rw-r--r--
procedure.h	5.9 KB	-rw-r--r--
protocol.h	10.95 KB	-rw-r--r--
proxy_protocol.h	548 B	-rw-r--r--
queues.h	3.46 KB	-rw-r--r--
records.h	2.93 KB	-rw-r--r--
repl_failsafe.h	1.55 KB	-rw-r--r--
replication.h	15.73 KB	-rw-r--r--
rijndael.h	1.67 KB	-rw-r--r--
rowid_filter.h	15.07 KB	-rw-r--r--
rpl_constants.h	3.28 KB	-rw-r--r--
rpl_filter.h	4.41 KB	-rw-r--r--
rpl_gtid.h	13.25 KB	-rw-r--r--
rpl_injector.h	9.41 KB	-rw-r--r--
rpl_mi.h	13.65 KB	-rw-r--r--
rpl_parallel.h	13.52 KB	-rw-r--r--
rpl_record.h	1.55 KB	-rw-r--r--
rpl_record_old.h	1.37 KB	-rw-r--r--
rpl_reporting.h	2.96 KB	-rw-r--r--
rpl_rli.h	31.89 KB	-rw-r--r--
rpl_tblmap.h	3.1 KB	-rw-r--r--
rpl_utility.h	9.32 KB	-rw-r--r--
scheduler.h	3.4 KB	-rw-r--r--
scope.h	1.76 KB	-rw-r--r--
select_handler.h	1.99 KB	-rw-r--r--
semisync.h	2.23 KB	-rw-r--r--
semisync_master.h	22.68 KB	-rw-r--r--
semisync_master_ack_receiver.h	5.73 KB	-rw-r--r--
semisync_slave.h	3.47 KB	-rw-r--r--
service_versions.h	1.91 KB	-rw-r--r--
session_tracker.h	12.81 KB	-rw-r--r--
set_var.h	15.66 KB	-rw-r--r--
slave.h	11.99 KB	-rw-r--r--
source_revision.h	67 B	-rw-r--r--
sp.h	21.69 KB	-rw-r--r--
sp_cache.h	2 KB	-rw-r--r--
sp_head.h	59.95 KB	-rw-r--r--
sp_pcontext.h	24.3 KB	-rw-r--r--
sp_rcontext.h	14 KB	-rw-r--r--
span.h	3.84 KB	-rw-r--r--
spatial.h	20.82 KB	-rw-r--r--
sql_acl.h	17.83 KB	-rw-r--r--
sql_admin.h	2.74 KB	-rw-r--r--
sql_alloc.h	1.83 KB	-rw-r--r--
sql_alter.h	11.56 KB	-rw-r--r--
sql_analyse.h	10.91 KB	-rw-r--r--
sql_analyze_stmt.h	9.64 KB	-rw-r--r--
sql_array.h	6.29 KB	-rw-r--r--
sql_audit.h	13.55 KB	-rw-r--r--
sql_base.h	24.8 KB	-rw-r--r--
sql_basic_types.h	9.23 KB	-rw-r--r--
sql_binlog.h	895 B	-rw-r--r--
sql_bitmap.h	7.95 KB	-rw-r--r--
sql_bootstrap.h	1.63 KB	-rw-r--r--
sql_cache.h	21.15 KB	-rw-r--r--
sql_callback.h	1.51 KB	-rw-r--r--
sql_class.h	236.46 KB	-rw-r--r--
sql_cmd.h	8.47 KB	-rw-r--r--
sql_connect.h	3.77 KB	-rw-r--r--
sql_const.h	10.83 KB	-rw-r--r--
sql_crypt.h	1.4 KB	-rw-r--r--
sql_cte.h	16.01 KB	-rw-r--r--
sql_cursor.h	2.26 KB	-rw-r--r--
sql_db.h	2.16 KB	-rw-r--r--
sql_debug.h	4.65 KB	-rw-r--r--
sql_delete.h	1.37 KB	-rw-r--r--
sql_derived.h	1.26 KB	-rw-r--r--
sql_digest.h	3.73 KB	-rw-r--r--
sql_digest_stream.h	1.53 KB	-rw-r--r--
sql_do.h	954 B	-rw-r--r--
sql_error.h	37.79 KB	-rw-r--r--
sql_explain.h	26.09 KB	-rw-r--r--
sql_expression_cache.h	4.23 KB	-rw-r--r--
sql_get_diagnostics.h	7.66 KB	-rw-r--r--
sql_handler.h	2.84 KB	-rw-r--r--
sql_help.h	920 B	-rw-r--r--
sql_hset.h	3.17 KB	-rw-r--r--
sql_insert.h	2.1 KB	-rw-r--r--
sql_join_cache.h	47.04 KB	-rw-r--r--
sql_lex.h	160.22 KB	-rw-r--r--
sql_lifo_buffer.h	9.26 KB	-rw-r--r--
sql_list.h	21.55 KB	-rw-r--r--
sql_load.h	1.25 KB	-rw-r--r--
sql_locale.h	2.61 KB	-rw-r--r--
sql_manager.h	960 B	-rw-r--r--
sql_mode.h	6.58 KB	-rw-r--r--
sql_parse.h	8.12 KB	-rw-r--r--
sql_partition.h	12.31 KB	-rw-r--r--
sql_partition_admin.h	5.73 KB	-rw-r--r--
sql_plist.h	7.55 KB	-rw-r--r--
sql_plugin.h	7.43 KB	-rw-r--r--
sql_plugin_compat.h	2.18 KB	-rw-r--r--
sql_prepare.h	11.14 KB	-rw-r--r--
sql_priv.h	17.05 KB	-rw-r--r--
sql_profile.h	7.51 KB	-rw-r--r--
sql_reload.h	1.01 KB	-rw-r--r--
sql_rename.h	941 B	-rw-r--r--
sql_repl.h	2.96 KB	-rw-r--r--
sql_schema.h	3.69 KB	-rw-r--r--
sql_select.h	85.38 KB	-rw-r--r--
sql_sequence.h	5.06 KB	-rw-r--r--
sql_servers.h	1.74 KB	-rw-r--r--
sql_show.h	9.11 KB	-rw-r--r--
sql_signal.h	3.28 KB	-rw-r--r--
sql_sort.h	4.32 KB	-rw-r--r--
sql_statistics.h	11.96 KB	-rw-r--r--
sql_string.h	34.27 KB	-rw-r--r--
sql_table.h	11.04 KB	-rw-r--r--
sql_tablespace.h	956 B	-rw-r--r--
sql_test.h	1.55 KB	-rw-r--r--
sql_time.h	8.18 KB	-rw-r--r--
sql_trigger.h	10.74 KB	-rw-r--r--
sql_truncate.h	2.02 KB	-rw-r--r--
sql_tvc.h	2.24 KB	-rw-r--r--
sql_type.h	250.17 KB	-rw-r--r--
sql_type_int.h	8.03 KB	-rw-r--r--
sql_type_json.h	1.34 KB	-rw-r--r--
sql_type_real.h	1.23 KB	-rw-r--r--
sql_udf.h	4.43 KB	-rw-r--r--
sql_union.h	1.04 KB	-rw-r--r--
sql_update.h	1.88 KB	-rw-r--r--
sql_view.h	2.33 KB	-rw-r--r--
sql_window.h	6.65 KB	-rw-r--r--
ssl_compat.h	3.13 KB	-rw-r--r--
strfunc.h	2.2 KB	-rw-r--r--
structs.h	24.99 KB	-rw-r--r--
sys_vars_shared.h	2.61 KB	-rw-r--r--
t_ctype.h	5.51 KB	-rw-r--r--
table.h	110.56 KB	-rw-r--r--
table_cache.h	4.44 KB	-rw-r--r--
thr_alarm.h	2.87 KB	-rw-r--r--
thr_lock.h	6.69 KB	-rw-r--r--
thr_malloc.h	1.18 KB	-rw-r--r--
thr_timer.h	1.43 KB	-rw-r--r--
thread_pool_priv.h	4.37 KB	-rw-r--r--
threadpool.h	4.38 KB	-rw-r--r--
transaction.h	1.43 KB	-rw-r--r--
tzfile.h	4.9 KB	-rw-r--r--
tztime.h	3.3 KB	-rw-r--r--
uniques.h	4.05 KB	-rw-r--r--
unireg.h	7.12 KB	-rw-r--r--
vers_string.h	2.87 KB	-rw-r--r--
vers_utils.h	155 B	-rw-r--r--
violite.h	9.54 KB	-rw-r--r--
waiting_threads.h	4.43 KB	-rw-r--r--
welcome_copyright_notice.h	1.19 KB	-rw-r--r--
win_tzname_data.h	6.35 KB	-rw-r--r--
winservice.h	1.17 KB	-rw-r--r--
wqueue.h	1.53 KB	-rw-r--r--
wsrep.h	3.23 KB	-rw-r--r--
wsrep_applier.h	2.71 KB	-rw-r--r--
wsrep_binlog.h	3.36 KB	-rw-r--r--
wsrep_client_service.h	2.31 KB	-rw-r--r--
wsrep_client_state.h	1.53 KB	-rw-r--r--
wsrep_condition_variable.h	1.42 KB	-rw-r--r--
wsrep_high_priority_service.h	4.61 KB	-rw-r--r--
wsrep_mutex.h	1.16 KB	-rw-r--r--
wsrep_mysqld.h	15.87 KB	-rw-r--r--
wsrep_mysqld_c.h	1.2 KB	-rw-r--r--
wsrep_on.h	1.68 KB	-rw-r--r--
wsrep_priv.h	1.6 KB	-rw-r--r--
wsrep_schema.h	4.57 KB	-rw-r--r--
wsrep_server_service.h	3.25 KB	-rw-r--r--
wsrep_server_state.h	2.19 KB	-rw-r--r--
wsrep_sst.h	3.86 KB	-rw-r--r--
wsrep_storage_service.h	1.69 KB	-rw-r--r--
wsrep_thd.h	10.58 KB	-rw-r--r--
wsrep_trans_observer.h	18.72 KB	-rw-r--r--
wsrep_types.h	997 B	-rw-r--r--
wsrep_utils.h	9.07 KB	-rw-r--r--
wsrep_var.h	3.96 KB	-rw-r--r--
wsrep_xid.h	1.32 KB	-rw-r--r--
xa.h	1.46 KB	-rw-r--r--

Code Editor : sql_string.h

#ifndef SQL_STRING_INCLUDED
#define SQL_STRING_INCLUDED

/*
   Copyright (c) 2000, 2013, Oracle and/or its affiliates.
   Copyright (c) 2008, 2020, MariaDB Corporation.

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 */

/* This file is originally from the mysql distribution. Coded by monty */

#ifdef USE_PRAGMA_INTERFACE
#pragma interface			/* gcc class implementation */
#endif

#include "m_ctype.h"                            /* my_charset_bin */
#include <my_sys.h>              /* alloc_root, my_free, my_realloc */
#include "m_string.h"                           /* TRASH */
#include "sql_list.h"

class String;
typedef struct st_io_cache IO_CACHE;
typedef struct st_mem_root MEM_ROOT;

#include "pack.h"
int sortcmp(const String *a,const String *b, CHARSET_INFO *cs);
String *copy_if_not_alloced(String *a,String *b,uint32 arg_length);
inline uint32 copy_and_convert(char *to, size_t to_length,
                               CHARSET_INFO *to_cs,
                               const char *from, size_t from_length,
                               CHARSET_INFO *from_cs, uint *errors)
{
  return my_convert(to, (uint)to_length, to_cs, from, (uint)from_length, from_cs, errors);
}

class String_copy_status: protected MY_STRCOPY_STATUS
{
public:
  const char *source_end_pos() const
  { return m_source_end_pos; }
  const char *well_formed_error_pos() const
  { return m_well_formed_error_pos; }
};

class Well_formed_prefix_status: public String_copy_status
{
public:
  Well_formed_prefix_status(CHARSET_INFO *cs,
                            const char *str, const char *end, size_t nchars)
  { cs->cset->well_formed_char_length(cs, str, end, nchars, this); }
};

class Well_formed_prefix: public Well_formed_prefix_status
{
  const char *m_str; // The beginning of the string
public:
  Well_formed_prefix(CHARSET_INFO *cs, const char *str, const char *end,
                     size_t nchars)
   :Well_formed_prefix_status(cs, str, end, nchars), m_str(str)
  { }
  Well_formed_prefix(CHARSET_INFO *cs, const char *str, size_t length,
                     size_t nchars)
   :Well_formed_prefix_status(cs, str, str + length, nchars), m_str(str)
  { }
  Well_formed_prefix(CHARSET_INFO *cs, const char *str, size_t length)
   :Well_formed_prefix_status(cs, str, str + length, length), m_str(str)
  { }
  Well_formed_prefix(CHARSET_INFO *cs, LEX_CSTRING str, size_t nchars)
   :Well_formed_prefix_status(cs, str.str, str.str + str.length, nchars),
    m_str(str.str)
  { }
  size_t length() const { return m_source_end_pos - m_str; }
};

class String_copier: public String_copy_status,
                     protected MY_STRCONV_STATUS
{
public:
  const char *cannot_convert_error_pos() const
  { return m_cannot_convert_error_pos; }
  const char *most_important_error_pos() const
  {
    return well_formed_error_pos() ? well_formed_error_pos() :
                                     cannot_convert_error_pos();
  }
  /*
    Convert a string between character sets.
    "dstcs" and "srccs" cannot be &my_charset_bin.
  */
  size_t convert_fix(CHARSET_INFO *dstcs, char *dst, size_t dst_length,
                     CHARSET_INFO *srccs, const char *src, size_t src_length, size_t nchars)
  {
    return my_convert_fix(dstcs, dst, dst_length,
                          srccs, src, src_length, nchars, this, this);
  }
  /*
     Copy a string. Fix bad bytes/characters to '?'.
  */
  uint well_formed_copy(CHARSET_INFO *to_cs, char *to, size_t to_length,
                        CHARSET_INFO *from_cs, const char *from, size_t from_length, size_t nchars);
  // Same as above, but without the "nchars" limit.
  uint well_formed_copy(CHARSET_INFO *to_cs, char *to, size_t to_length,
                        CHARSET_INFO *from_cs, const char *from, size_t from_length)
  {
    return well_formed_copy(to_cs, to, to_length,
                            from_cs, from, from_length,
                            from_length /* No limit on "nchars"*/);
  }
};

size_t my_copy_with_hex_escaping(CHARSET_INFO *cs,
                                 char *dst, size_t dstlen,
                                 const char *src, size_t srclen);
uint convert_to_printable(char *to, size_t to_len,
                          const char *from, size_t from_len,
                          CHARSET_INFO *from_cs, size_t nbytes= 0);
size_t convert_to_printable_required_length(uint len);

class Charset
{
  CHARSET_INFO *m_charset;
public:
  Charset() :m_charset(&my_charset_bin) { }
  Charset(CHARSET_INFO *cs) :m_charset(cs) { }

CHARSET_INFO *charset() const { return m_charset; }
  uint mbminlen() const { return m_charset->mbminlen; }
  uint mbmaxlen() const { return m_charset->mbmaxlen; }

size_t numchars(const char *str, const char *end) const
  {
    return m_charset->cset->numchars(m_charset, str, end);
  }
  size_t lengthsp(const char *str, size_t length) const
  {
    return m_charset->cset->lengthsp(m_charset, str, length);
  }
  size_t charpos(const char *str, const char *end, size_t pos) const
  {
    return m_charset->cset->charpos(m_charset, str, end, pos);
  }
  void set_charset(CHARSET_INFO *charset_arg)
  {
    m_charset= charset_arg;
  }
  void set_charset(const Charset &other)
  {
    m_charset= other.m_charset;
  }
  void swap(Charset &other)
  {
    swap_variables(CHARSET_INFO*, m_charset, other.m_charset);
  }
  bool same_encoding(const Charset &other) const
  {
    return !strcmp(m_charset->csname, other.m_charset->csname);
  }
  /*
    Collation name without the character set name.
    For example, in case of "latin1_swedish_ci",
    this method returns "_swedish_ci".
  */
  LEX_CSTRING collation_specific_name() const;
  bool encoding_allows_reinterpret_as(CHARSET_INFO *cs) const;
  bool eq_collation_specific_names(CHARSET_INFO *cs) const;
  bool can_have_collate_clause() const
  {
    return m_charset != &my_charset_bin;
  }

/*
    The MariaDB version when the last collation change happened,
    e.g. due to a bug fix. See functions below.
  */
  static ulong latest_mariadb_version_with_collation_change()
  {
    return 110002;
  }

/*
    Check if the collation with the given ID changed its order
    since the given MariaDB version.
  */
  static bool collation_changed_order(ulong mysql_version, uint cs_number)
  {
    if ((mysql_version < 50048 &&
           (cs_number == 11 || /* ascii_general_ci - bug #29499, bug #27562 */
            cs_number == 41 || /* latin7_general_ci - bug #29461 */
            cs_number == 42 || /* latin7_general_cs - bug #29461 */
            cs_number == 20 || /* latin7_estonian_cs - bug #29461 */
            cs_number == 21 || /* latin2_hungarian_ci - bug #29461 */
            cs_number == 22 || /* koi8u_general_ci - bug #29461 */
            cs_number == 23 || /* cp1251_ukrainian_ci - bug #29461 */
            cs_number == 26)) || /* cp1250_general_ci - bug #29461 */
           (mysql_version < 50124 &&
           (cs_number == 33 || /* utf8_general_ci - bug #27877 */
            cs_number == 35))) /* ucs2_general_ci - bug #27877 */
        return true;

if (cs_number == 159 && /* ucs2_general_mysql500_ci - MDEV-30746 */
        ((mysql_version >= 100400 && mysql_version < 100429) ||
         (mysql_version >= 100500 && mysql_version < 100520) ||
         (mysql_version >= 100600 && mysql_version < 100613) ||
         (mysql_version >= 100700 && mysql_version < 100708) ||
         (mysql_version >= 100800 && mysql_version < 100808) ||
         (mysql_version >= 100900 && mysql_version < 100906) ||
         (mysql_version >= 101000 && mysql_version < 101004) ||
         (mysql_version >= 101100 && mysql_version < 101103) ||
         (mysql_version >= 110000 && mysql_version < 110002)))
      return true;
    return false;
  }

/**
     Check if a collation has changed ID since the given version.
     Return the new ID.

@param mysql_version
     @param cs_number     - collation ID

@retval the new collation ID (or cs_number, if no change)
  */

static uint upgrade_collation_id(ulong mysql_version, uint cs_number)
  {
    if (mysql_version >= 50300 && mysql_version <= 50399)
    {
      switch (cs_number) {
      case 149: return MY_PAGE2_COLLATION_ID_UCS2;   // ucs2_crotian_ci
      case 213: return MY_PAGE2_COLLATION_ID_UTF8;   // utf8_crotian_ci
      }
    }
    if ((mysql_version >= 50500 && mysql_version <= 50599) ||
        (mysql_version >= 100000 && mysql_version <= 100005))
    {
      switch (cs_number) {
      case 149: return MY_PAGE2_COLLATION_ID_UCS2;   // ucs2_crotian_ci
      case 213: return MY_PAGE2_COLLATION_ID_UTF8;   // utf8_crotian_ci
      case 214: return MY_PAGE2_COLLATION_ID_UTF32;  // utf32_croatian_ci
      case 215: return MY_PAGE2_COLLATION_ID_UTF16;  // utf16_croatian_ci
      case 245: return MY_PAGE2_COLLATION_ID_UTF8MB4;// utf8mb4_croatian_ci
      }
    }
    return cs_number;
  }

};

/*
  A storage for String.
  Should be eventually derived from LEX_STRING.
*/
class Static_binary_string : public Sql_alloc
{
protected:
  char *Ptr;
  uint32 str_length;
public:
  Static_binary_string()
   :Ptr(NULL),
    str_length(0)
  { }
  Static_binary_string(char *str, size_t length_arg)
   :Ptr(str),
    str_length((uint32) length_arg)
  {
    DBUG_ASSERT(length_arg < UINT_MAX32);
  }
  inline uint32 length() const { return str_length;}
  inline char& operator [] (size_t i) const { return Ptr[i]; }
  inline void length(size_t len) { str_length=(uint32)len ; }
  inline bool is_empty() const { return (str_length == 0); }
  inline const char *ptr() const { return Ptr; }
  inline const char *end() const { return Ptr + str_length; }

LEX_STRING lex_string() const
  {
    LEX_STRING str = { (char*) ptr(), length() };
    return str;
  }
  LEX_CSTRING lex_cstring() const
  {
    LEX_CSTRING skr = { ptr(), length() };
    return skr;
  }

bool has_8bit_bytes() const
  {
    for (const char *c= ptr(), *c_end= end(); c < c_end; c++)
    {
      if (!my_isascii(*c))
        return true;
    }
    return false;
  }

bool bin_eq(const Static_binary_string *other) const
  {
    return length() == other->length() &&
           !memcmp(ptr(), other->ptr(), length());
  }

void set(char *str, size_t len)
  {
    Ptr= str;
    str_length= (uint32) len;
  }

void swap(Static_binary_string &s)
  {
    swap_variables(char *, Ptr, s.Ptr);
    swap_variables(uint32, str_length, s.str_length);
  }

/*
    PMG 2004.11.12
    This is a method that works the same as perl's "chop". It simply
    drops the last character of a string. This is useful in the case
    of the federated storage handler where I'm building a unknown
    number, list of values and fields to be used in a sql insert
    statement to be run on the remote server, and have a comma after each.
    When the list is complete, I "chop" off the trailing comma

ex.
      String stringobj;
      stringobj.append("VALUES ('foo', 'fi', 'fo',");
      stringobj.chop();
      stringobj.append(")");

In this case, the value of string was:

VALUES ('foo', 'fi', 'fo',
    VALUES ('foo', 'fi', 'fo'
    VALUES ('foo', 'fi', 'fo')
  */
  inline void chop()
  {
    str_length--;
    Ptr[str_length]= '\0';
    DBUG_ASSERT(strlen(Ptr) == str_length);
  }

// Returns offset to substring or -1
  int strstr(const Static_binary_string &search, uint32 offset=0);
  // Returns offset to substring or -1
  int strrstr(const Static_binary_string &search, uint32 offset=0);

/*
    The following append operations do NOT check alloced memory
    q_*** methods writes values of parameters itself
    qs_*** methods writes string representation of value
  */
  void q_append(const char c)
  {
    Ptr[str_length++] = c;
  }
  void q_append2b(const uint32 n)
  {
    int2store(Ptr + str_length, n);
    str_length += 2;
  }
  void q_append(const uint32 n)
  {
    int4store(Ptr + str_length, n);
    str_length += 4;
  }
  void q_append(double d)
  {
    float8store(Ptr + str_length, d);
    str_length += 8;
  }
  void q_append(double *d)
  {
    float8store(Ptr + str_length, *d);
    str_length += 8;
  }
  /*
    Append a wide character.
    The caller must have allocated at least cs->mbmaxlen bytes.
  */
  int q_append_wc(my_wc_t wc, CHARSET_INFO *cs)
  {
    int mblen;
    if ((mblen= cs->cset->wc_mb(cs, wc,
                                (uchar *) end(),
                                (uchar *) end() + cs->mbmaxlen)) > 0)
      str_length+= (uint32) mblen;
    return mblen;
  }
  void q_append(const char *data, size_t data_len)
  {
    if (data_len)
      memcpy(Ptr + str_length, data, data_len);
    DBUG_ASSERT(str_length <= UINT_MAX32 - data_len);
    str_length += (uint)data_len;
  }
  void q_append(const LEX_CSTRING *ls)
  {
    DBUG_ASSERT(ls->length < UINT_MAX32 &&
                ((ls->length == 0 && !ls->str) ||
                 ls->length == strlen(ls->str)));
    q_append(ls->str, (uint32) ls->length);
  }

void write_at_position(int position, uint32 value)
  {
    int4store(Ptr + position,value);
  }

void qs_append(const char *str)
  {
    qs_append(str, (uint32)strlen(str));
  }
  void qs_append(const LEX_CSTRING *ls)
  {
    DBUG_ASSERT(ls->length < UINT_MAX32 &&
                ((ls->length == 0 && !ls->str) ||
                 ls->length == strlen(ls->str)));
    qs_append(ls->str, (uint32)ls->length);
  }
  void qs_append(const char *str, size_t len);
  void qs_append_hex(const char *str, uint32 len);
  void qs_append_hex_uint32(uint32 num);
  void qs_append(double d);
  void qs_append(double *d);
  inline void qs_append(const char c)
  {
     Ptr[str_length]= c;
     str_length++;
  }
  void qs_append(int i);
  void qs_append(uint i)
  {
    qs_append((ulonglong)i);
  }
  void qs_append(ulong i)
  {
    qs_append((ulonglong)i);
  }
  void qs_append(ulonglong i);
  void qs_append(longlong i, int radix)
  {
    char *buff= Ptr + str_length;
    char *end= ll2str(i, buff, radix, 0);
    str_length+= uint32(end-buff);
  }
};

class Binary_string: public Static_binary_string
{
  uint32 Alloced_length, extra_alloc;
  bool alloced, thread_specific;
  void init_private_data()
  {
    Alloced_length= extra_alloc= 0;
    alloced= thread_specific= false;
  }
public:
  Binary_string()
  {
    init_private_data();
  }
  explicit Binary_string(size_t length_arg)
  {
    init_private_data();
    (void) real_alloc(length_arg);
  }
  explicit Binary_string(const char *str)
   :Binary_string(str, strlen(str))
  { }
  /*
    NOTE: If one intend to use the c_ptr() method, the following two
    contructors need the size of memory for STR to be at least LEN+1 (to make
    room for zero termination).
  */
  Binary_string(const char *str, size_t len)
   :Static_binary_string((char *) str, len)
  {
    init_private_data();
  }
  Binary_string(char *str, size_t len)
   :Static_binary_string(str, len)
  {
    Alloced_length= (uint32) len;
    extra_alloc= 0;
    alloced= thread_specific= 0;
  }
  explicit Binary_string(const Binary_string &str)
   :Static_binary_string(str)
  {
    Alloced_length= str.Alloced_length;
    extra_alloc= 0;
    alloced= thread_specific= 0;
  }

~Binary_string() { free(); }

/* Mark variable thread specific it it's not allocated already */
  inline void set_thread_specific()
  {
    if (!alloced)
      thread_specific= 1;
  }
  bool is_alloced() const { return alloced; }
  inline uint32 alloced_length() const { return Alloced_length;}
  inline uint32 extra_allocation() const { return extra_alloc;}
  inline void extra_allocation(size_t len) { extra_alloc= (uint32)len; }
  inline void mark_as_const() { Alloced_length= 0;}

inline bool uses_buffer_owned_by(const Binary_string *s) const
  {
    return (s->alloced && Ptr >= s->Ptr && Ptr < s->Ptr + s->str_length);
  }

/* Swap two string objects. Efficient way to exchange data without memcpy. */
  void swap(Binary_string &s)
  {
    Static_binary_string::swap(s);
    swap_variables(uint32, Alloced_length, s.Alloced_length);
    swap_variables(bool, alloced, s.alloced);
  }

/**
     Points the internal buffer to the supplied one. The old buffer is freed.
     @param str Pointer to the new buffer.
     @param arg_length Length of the new buffer in characters, excluding any
            null character.
     @note The new buffer will not be null terminated.
  */
  void set_alloced(char *str, size_t length_arg, size_t alloced_length_arg)
  {
    free();
    Static_binary_string::set(str, length_arg);
    DBUG_ASSERT(alloced_length_arg < UINT_MAX32);
    Alloced_length= (uint32) alloced_length_arg;
  }
  inline void set(char *str, size_t arg_length)
  {
    set_alloced(str, arg_length, arg_length);
  }
  inline void set(const char *str, size_t arg_length)
  {
    free();
    Static_binary_string::set((char *) str, arg_length);
  }

void set(Binary_string &str, size_t offset, size_t arg_length)
  {
    DBUG_ASSERT(&str != this);
    free();
    Static_binary_string::set((char*) str.ptr() + offset, arg_length);
    if (str.Alloced_length)
      Alloced_length= (uint32) (str.Alloced_length - offset);
  }

/* Take over handling of buffer from some other object */
  void reset(char *ptr_arg, size_t length_arg, size_t alloced_length_arg)
  {
    set_alloced(ptr_arg, length_arg, alloced_length_arg);
    alloced= ptr_arg != 0;
  }

/* Forget about the buffer, let some other object handle it */
  char *release()
  {
    char *old= Ptr;
    Static_binary_string::set(NULL, 0);
    init_private_data();
    return old;
  }

inline void set_quick(char *str, size_t arg_length)
  {
    if (!alloced)
    {
      Static_binary_string::set(str, arg_length);
      Alloced_length= (uint32) arg_length;
    }
  }

inline Binary_string& operator=(const Binary_string &s)
  {
    if (&s != this)
    {
      /*
        It is forbidden to do assignments like
        some_string = substring_of_that_string
      */
      DBUG_ASSERT(!s.uses_buffer_owned_by(this));
      set_alloced((char *) s.Ptr, s.str_length, s.Alloced_length);
    }
    return *this;
  }

bool set_hex(ulonglong num);
  bool set_hex(const char *str, uint32 len);
  bool set_fcvt(double num, uint decimals);

bool copy();                                  // Alloc string if not alloced
  bool copy(const Binary_string &s);            // Allocate new string
  bool copy(const char *s, size_t arg_length);	// Allocate new string
  bool copy_or_move(const char *s,size_t arg_length);

bool append_ulonglong(ulonglong val);
  bool append_longlong(longlong val);

bool append(const char *s, size_t size)
  {
    if (!size)
      return false;
    if (realloc_with_extra_if_needed(str_length + size))
      return true;
    q_append(s, size);
    return false;
  }
  bool append(const Binary_string &s)
  {
    return append(s.ptr(), s.length());
  }
  bool append(IO_CACHE* file, uint32 arg_length);

inline bool append_char(char chr)
  {
    if (str_length < Alloced_length)
    {
      Ptr[str_length++]= chr;
    }
    else
    {
      if (unlikely(realloc_with_extra(str_length + 1)))
	return true;
      Ptr[str_length++]= chr;
    }
    return false;
  }
  bool append_hex(const char *src, uint32 srclen)
  {
    for (const char *src_end= src + srclen ; src != src_end ; src++)
    {
      if (unlikely(append_char(_dig_vec_lower[((uchar) *src) >> 4])) ||
          unlikely(append_char(_dig_vec_lower[((uchar) *src) & 0x0F])))
        return true;
    }
    return false;
  }
  bool append_hex_uint32(uint32 num)
  {
    if (reserve(8))
      return true;
    qs_append_hex_uint32(num);
    return false;
  }
  bool append_with_step(const char *s, uint32 arg_length, uint32 step_alloc)
  {
    uint32 new_length= arg_length + str_length;
    if (new_length > Alloced_length &&
        unlikely(realloc(new_length + step_alloc)))
      return true;
    q_append(s, arg_length);
    return false;
  }

inline char *c_ptr()
  {
    DBUG_ASSERT(!alloced || !Ptr || !Alloced_length ||
                (Alloced_length >= (str_length + 1)));

if (!Ptr || Ptr[str_length])              // Should be safe
      (void) realloc(str_length);
    return Ptr;
  }
  inline char *c_ptr_quick()
  {
    if (Ptr && str_length < Alloced_length)
      Ptr[str_length]=0;
    return Ptr;
  }
  inline char *c_ptr_safe()
  {
    if (Ptr && str_length < Alloced_length)
      Ptr[str_length]=0;
    else
      (void) realloc(str_length);
    return Ptr;
  }

inline void free()
  {
    if (alloced)
    {
      alloced=0;
      my_free(Ptr);
    }
    Alloced_length= extra_alloc= 0;
    Static_binary_string::set(NULL, 0); // Safety
  }
  inline bool alloc(size_t arg_length)
  {
    if (arg_length < Alloced_length)
      return 0;
    return real_alloc(arg_length);
  }
  bool real_alloc(size_t arg_length);  // Empties old string
  bool realloc_raw(size_t arg_length);
  bool realloc(size_t arg_length)
  {
    if (realloc_raw(arg_length))
      return TRUE;
    Ptr[arg_length]= 0; // This make other funcs shorter
    return FALSE;
  }
  bool realloc_with_extra(size_t arg_length)
  {
    if (extra_alloc < 4096)
      extra_alloc= extra_alloc*2+128;
    if (realloc_raw(arg_length + extra_alloc))
      return TRUE;
    Ptr[arg_length]=0;        // This make other funcs shorter
    return FALSE;
  }
  bool realloc_with_extra_if_needed(size_t arg_length)
  {
    if (arg_length < Alloced_length)
    {
      Ptr[arg_length]=0; // behave as if realloc was called.
      return 0;
    }
    return realloc_with_extra(arg_length);
  }
  // Shrink the buffer, but only if it is allocated on the heap.
  inline void shrink(size_t arg_length)
  {
    if (!is_alloced())
      return;
    if (ALIGN_SIZE(arg_length+1) < Alloced_length)
    {
      char *new_ptr;
      if (unlikely(!(new_ptr=(char*)
                     my_realloc(Ptr,
                                arg_length,MYF((thread_specific ?
                                                MY_THREAD_SPECIFIC : 0))))))
      {
        Alloced_length= 0;
        real_alloc(arg_length);
      }
      else
      {
        Ptr= new_ptr;
        Alloced_length= (uint32) arg_length;
      }
    }
  }
  void move(Binary_string &s)
  {
    set_alloced(s.Ptr, s.str_length, s.Alloced_length);
    extra_alloc= s.extra_alloc;
    alloced= s.alloced;
    thread_specific= s.thread_specific;
    s.alloced= 0;
  }
  bool fill(uint32 max_length,char fill);
  /*
    Replace substring with string
    If wrong parameter or not enough memory, do nothing
  */
  bool replace(uint32 offset,uint32 arg_length, const char *to, uint32 length);
  bool replace(uint32 offset,uint32 arg_length, const Static_binary_string &to)
  {
    return replace(offset,arg_length,to.ptr(),to.length());
  }

int reserve(size_t space_needed)
  {
    DBUG_ASSERT((ulonglong) str_length + space_needed < UINT_MAX32);
    return realloc(str_length + space_needed);
  }
  int reserve(size_t space_needed, size_t grow_by);

inline char *prep_append(uint32 arg_length, uint32 step_alloc)
  {
    uint32 new_length= arg_length + str_length;
    if (new_length > Alloced_length)
    {
      if (unlikely(realloc(new_length + step_alloc)))
        return 0;
    }
    uint32 old_length= str_length;
    str_length+= arg_length;
    return Ptr + old_length;                  // Area to use
  }

void q_net_store_length(ulonglong length)
  {
    DBUG_ASSERT(Alloced_length >= (str_length + net_length_size(length)));
    char *pos= (char *) net_store_length((uchar *)(Ptr + str_length), length);
    str_length= uint32(pos - Ptr);
  }
  void q_net_store_data(const uchar *from, size_t length)
  {
    DBUG_ASSERT(length < UINT_MAX32);
    DBUG_ASSERT(Alloced_length >= (str_length + length +
                                   net_length_size(length)));
    q_net_store_length(length);
    q_append((const char *)from, (uint32) length);
  }
};

class String: public Charset, public Binary_string
{
public:
  String() = default;
  String(size_t length_arg)
   :Binary_string(length_arg)
  { }
  String(const char *str, CHARSET_INFO *cs)
   :Charset(cs),
    Binary_string(str)
  { }
  /*
    NOTE: If one intend to use the c_ptr() method, the following two
    contructors need the size of memory for STR to be at least LEN+1 (to make
    room for zero termination).
  */
  String(const char *str, size_t len, CHARSET_INFO *cs)
   :Charset(cs),
    Binary_string((char *) str, len)
  { }
  String(char *str, size_t len, CHARSET_INFO *cs)
   :Charset(cs),
    Binary_string(str, len)
  { }
  String(const String &str) = default;

void set(String &str,size_t offset,size_t arg_length)
  {
    Binary_string::set(str, offset, arg_length);
    set_charset(str);
  }
  inline void set(char *str,size_t arg_length, CHARSET_INFO *cs)
  {
    Binary_string::set(str, arg_length);
    set_charset(cs);
  }
  inline void set(const char *str,size_t arg_length, CHARSET_INFO *cs)
  {
    Binary_string::set(str, arg_length);
    set_charset(cs);
  }
  bool set_ascii(const char *str, size_t arg_length);
  inline void set_quick(char *str,size_t arg_length, CHARSET_INFO *cs)
  {
    Binary_string::set_quick(str, arg_length);
    set_charset(cs);
  }
  bool set_int(longlong num, bool unsigned_flag, CHARSET_INFO *cs);
  bool set(int num, CHARSET_INFO *cs) { return set_int(num, false, cs); }
  bool set(uint num, CHARSET_INFO *cs) { return set_int(num, true, cs); }
  bool set(long num, CHARSET_INFO *cs) { return set_int(num, false, cs); }
  bool set(ulong num, CHARSET_INFO *cs) { return set_int(num, true, cs); }
  bool set(longlong num, CHARSET_INFO *cs) { return set_int(num, false, cs); }
  bool set(ulonglong num, CHARSET_INFO *cs) { return set_int((longlong)num, true, cs); }
  bool set_real(double num,uint decimals, CHARSET_INFO *cs);
  bool set_fcvt(double num, uint decimals)
  {
    set_charset(&my_charset_latin1);
    return Binary_string::set_fcvt(num, decimals);
  }

bool set_hex(ulonglong num)
  {
    set_charset(&my_charset_latin1);
    return Binary_string::set_hex(num);
  }
  bool set_hex(const char *str, uint32 len)
  {
    set_charset(&my_charset_latin1);
    return Binary_string::set_hex(str, len);
  }

/* Take over handling of buffer from some other object */
  void reset(char *ptr_arg, size_t length_arg, size_t alloced_length_arg,
             CHARSET_INFO *cs)
  {
    Binary_string::reset(ptr_arg, length_arg, alloced_length_arg);
    set_charset(cs);
  }

inline String& operator = (const String &s)
  {
    if (&s != this)
    {
      set_charset(s);
      Binary_string::operator=(s);
    }
    return *this;
  }

bool copy()
  {
    return Binary_string::copy();
  }
  bool copy(const String &s)
  {
    set_charset(s);
    return Binary_string::copy(s);
  }
  bool copy(const char *s, size_t arg_length, CHARSET_INFO *cs)
  {
    set_charset(cs);
    return Binary_string::copy(s, arg_length);
  }
  bool copy_or_move(const char *s, size_t arg_length, CHARSET_INFO *cs)
  {
    set_charset(cs);
    return Binary_string::copy_or_move(s, arg_length);
  }
  static bool needs_conversion(size_t arg_length,
  			       CHARSET_INFO *cs_from, CHARSET_INFO *cs_to,
			       uint32 *offset);
  static bool needs_conversion_on_storage(size_t arg_length,
                                          CHARSET_INFO *cs_from,
                                          CHARSET_INFO *cs_to);
  bool copy_aligned(const char *s, size_t arg_length, size_t offset,
		    CHARSET_INFO *cs);
  bool set_or_copy_aligned(const char *s, size_t arg_length, CHARSET_INFO *cs);
  bool copy(const char*s, size_t arg_length, CHARSET_INFO *csfrom,
	    CHARSET_INFO *csto, uint *errors);
  bool copy(const String *str, CHARSET_INFO *tocs, uint *errors)
  {
    return copy(str->ptr(), str->length(), str->charset(), tocs, errors);
  }
  bool copy(CHARSET_INFO *tocs,
            CHARSET_INFO *fromcs, const char *src, size_t src_length,
            size_t nchars, String_copier *copier)
  {
    if (unlikely(alloc(tocs->mbmaxlen * src_length)))
      return true;
    str_length= copier->well_formed_copy(tocs, Ptr, alloced_length(),
                                         fromcs, src, (uint)src_length, (uint)nchars);
    set_charset(tocs);
    return false;
  }
  // Append without character set conversion
  bool append(const String &s)
  {
    return Binary_string::append(s);
  }
  inline bool append(char chr)
  {
    return Binary_string::append_char(chr);
  }
  bool append_hex(const char *src, uint32 srclen)
  {
    return Binary_string::append_hex(src, srclen);
  }
  bool append_hex(const uchar *src, uint32 srclen)
  {
    return Binary_string::append_hex((const char*)src, srclen);
  }
  bool append(IO_CACHE* file, uint32 arg_length)
  {
    return Binary_string::append(file, arg_length);
  }
  inline bool append(const char *s, uint32 arg_length, uint32 step_alloc)
  {
    return append_with_step(s, arg_length, step_alloc);
  }

// Append with optional character set conversion from ASCII (e.g. to UCS2)
  bool append(const char *s)
  {
    return append(s, strlen(s));
  }
  bool append(const LEX_STRING *ls)
  {
    DBUG_ASSERT(ls->length < UINT_MAX32 &&
                ((ls->length == 0 && !ls->str) ||
                 ls->length == strlen(ls->str)));
    return append(ls->str, (uint32) ls->length);
  }
  bool append(const LEX_CSTRING *ls)
  {
    DBUG_ASSERT(ls->length < UINT_MAX32 &&
                ((ls->length == 0 && !ls->str) ||
                 ls->length == strlen(ls->str)));
    return append(ls->str, (uint32) ls->length);
  }
  bool append(const LEX_CSTRING &ls)
  {
    return append(&ls);
  }
  bool append_name_value(const LEX_CSTRING &name,
                         const LEX_CSTRING &value,
                         uchar quot= '\0')
  {
    return
      append(name) ||
      append('=') ||
      (quot && append(quot)) ||
      append(value) ||
      (quot && append(quot));
  }
  bool append(const char *s, size_t size);
  bool append_parenthesized(long nr, int radix= 10);

// Append with optional character set conversion from cs to charset()
  bool append(const char *s, size_t arg_length, CHARSET_INFO *cs);
  bool append(const LEX_CSTRING &s, CHARSET_INFO *cs)
  {
    return append(s.str, s.length, cs);
  }

// Append a wide character
  bool append_wc(my_wc_t wc)
  {
    if (reserve(mbmaxlen()))
      return true;
    int mblen= q_append_wc(wc, charset());
    if (mblen > 0)
      return false;
    else if (mblen == MY_CS_ILUNI && wc != '?')
      return q_append_wc('?', charset()) <= 0;
    return true;
  }

// Append a number with zero prefilling
  bool append_zerofill(uint num, uint width)
  {
    static const char zeros[15]= "00000000000000";
    char intbuff[15];
    uint length= (uint) (int10_to_str(num, intbuff, 10) - intbuff);
    if (length < width &&
        append(zeros, width - length, &my_charset_latin1))
      return true;
    return append(intbuff, length, &my_charset_latin1);
  }

/*
    Append a bitmask in an uint32 with a translation into a
    C-style human readable representation, e.g.:
      0x05 -> "(flag04|flag01)"

@param flags  - the flags to translate
    @param names  - an array of flag names
    @param count  - the number of available elements in "names"
  */
  bool append_flag32_names(uint32 flags, const char *names[], size_t count)
  {
    bool added= false;
    if (flags && append('('))
      return true;
    for (ulong i= 0; i <= 31; i++)
    {
      ulong bit= 31 - i;
      if (flags & (1 << bit))
      {
        if (added && append('|'))
          return true;
        if (append(bit < count ? names[bit] : "?"))
          return true;
        added= true;
      }
    }
    if (flags && append(')'))
      return true;
    return false;
  }

void strip_sp();
  friend int sortcmp(const String *a,const String *b, CHARSET_INFO *cs);
  friend int stringcmp(const String *a,const String *b);
  friend String *copy_if_not_alloced(String *a,String *b,uint32 arg_length);
  friend class Field;
  uint32 numchars() const
  {
    return (uint32) Charset::numchars(ptr(), end());
  }
  int charpos(longlong i, uint32 offset=0)
  {
    if (i <= 0)
      return (int) i;
    return (int) Charset::charpos(ptr() + offset, end(), (size_t) i);
  }
  size_t lengthsp() const
  {
    return Charset::lengthsp(Ptr, str_length);
  }

void print(String *to) const;
  void print_with_conversion(String *to, CHARSET_INFO *cs) const;
  void print(String *to, CHARSET_INFO *cs) const
  {
    if (my_charset_same(charset(), cs))
      print(to);
    else
      print_with_conversion(to, cs);
  }

bool append_for_single_quote(const char *st, size_t len);
  bool append_for_single_quote(const String *s)
  {
    return append_for_single_quote(s->ptr(), s->length());
  }
  bool append_for_single_quote(const char *st)
  {
    size_t len= strlen(st);
    DBUG_ASSERT(len < UINT_MAX32);
    return append_for_single_quote(st, (uint32) len);
  }

void swap(String &s)
  {
    Charset::swap(s);
    Binary_string::swap(s);
  }

uint well_formed_length() const
  {
    return (uint) Well_formed_prefix(charset(), ptr(), length()).length();
  }
  bool is_ascii() const
  {
    if (length() == 0)
      return TRUE;
    if (charset()->mbminlen > 1)
      return FALSE;
    return !has_8bit_bytes();
  }
  bool eq(const String *other, CHARSET_INFO *cs) const
  {
    return !sortcmp(this, other, cs);
  }
private:
  bool append_semi_hex(const char *s, uint len, CHARSET_INFO *cs);
};

// The following class is a backport from MySQL 5.6:
/**
  String class wrapper with a preallocated buffer of size buff_sz

This class allows to replace sequences of:
     char buff[12345];
     String str(buff, sizeof(buff));
     str.length(0);
  with a simple equivalent declaration:
     StringBuffer<12345> str;
*/

template<size_t buff_sz>
class StringBuffer : public String
{
  char buff[buff_sz];

public:
  StringBuffer() : String(buff, buff_sz, &my_charset_bin) { length(0); }
  explicit StringBuffer(CHARSET_INFO *cs) : String(buff, buff_sz, cs)
  {
    length(0);
  }
};

class String_space: public String
{
public:
  String_space(uint n)
  {
    if (fill(n, ' '))
      set("", 0, &my_charset_bin);
  }
};

static inline bool check_if_only_end_space(CHARSET_INFO *cs,
                                           const char *str,
                                           const char *end)
{
  return str+ cs->cset->scan(cs, str, end, MY_SEQ_SPACES) == end;
}

int append_query_string(CHARSET_INFO *csinfo, String *to,
                        const char *str, size_t len, bool no_backslash);

#endif /* SQL_STRING_INCLUDED */

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Code Editor : sql_string.h