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mariadb/myisam/mi_open.c
bk@work.mysql.com f4c589ff6c Import changeset
2000-07-31 21:29:14 +02:00

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/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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; either version 2 of the License, or
(at your option) any later version.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/* open a isam-database */
#include "fulltext.h"
#include <m_ctype.h>
#if defined(MSDOS) || defined(__WIN__)
#ifdef __WIN__
#include <fcntl.h>
#else
#include <process.h> /* Prototype for getpid */
#endif
#endif
#ifdef VMS
#include "static.c"
#endif
static void setup_functions(MYISAM_SHARE *info);
static void setup_key_functions(MI_KEYDEF *keyinfo);
#define get_next_element(to,pos,size) { memcpy((char*) to,pos,(size_t) size); \
pos+=size;}
/******************************************************************************
** Return the shared struct if the table is already open.
** In MySQL the server will handle version issues.
******************************************************************************/
static MI_INFO *test_if_reopen(char *filename)
{
LIST *pos;
for (pos=myisam_open_list ; pos ; pos=pos->next)
{
MI_INFO *info=(MI_INFO*) pos->data;
MYISAM_SHARE *share=info->s;
if (!strcmp(share->filename,filename) && share->last_version)
return info;
}
return 0;
}
/******************************************************************************
open a isam database.
if handle_locking is 0 then exit with error if database is locked
if handle_locking is 1 then wait if database is locked
if handle_locking is 2 then continue, but count-vars in st_i_info
may be wrong. count-vars are automaticly fixed after next isam
request.
******************************************************************************/
MI_INFO *mi_open(const char *name, int mode, uint handle_locking)
{
int lock_error,kfile,open_mode,save_errno;
uint i,j,len,errpos,head_length,base_pos,offset,info_length,extra,keys,
key_parts,unique_key_parts,tmp_length,uniques;
char name_buff[FN_REFLEN],*disk_cache,*disk_pos;
MI_INFO info,*m_info,*old_info;
MYISAM_SHARE share_buff,*share;
ulong rec_per_key_part[MI_MAX_POSSIBLE_KEY*MI_MAX_KEY_SEG];
my_off_t key_root[MI_MAX_POSSIBLE_KEY],key_del[MI_MAX_KEY_BLOCK_SIZE];
ulonglong max_key_file_length, max_data_file_length;
DBUG_ENTER("mi_open");
LINT_INIT(m_info);
kfile= -1;
lock_error=1;
errpos=0;
head_length=sizeof(share_buff.state.header);
bzero((byte*) &info,sizeof(info));
VOID(fn_format(name_buff,name,"",MI_NAME_IEXT,4+16+32));
pthread_mutex_lock(&THR_LOCK_myisam);
if (!(old_info=test_if_reopen(name_buff)))
{
share= &share_buff;
bzero((gptr) &share_buff,sizeof(share_buff));
share_buff.state.rec_per_key_part=rec_per_key_part;
share_buff.state.key_root=key_root;
share_buff.state.key_del=key_del;
if ((kfile=my_open(name_buff,(open_mode=O_RDWR) | O_SHARE,MYF(0))) < 0)
{
if ((errno != EROFS && errno != EACCES) ||
mode != O_RDONLY ||
(kfile=my_open(name_buff,(open_mode=O_RDONLY) | O_SHARE,MYF(0))) < 0)
goto err;
}
errpos=1;
if (my_read(kfile,(char*) share->state.header.file_version,head_length,
MYF(MY_NABP)))
goto err;
if (memcmp((byte*) share->state.header.file_version,
(byte*) myisam_file_magic, 4))
{
DBUG_PRINT("error",("Wrong header in %s",name_buff));
DBUG_DUMP("error_dump",(char*) share->state.header.file_version,
head_length);
my_errno=HA_ERR_CRASHED;
goto err;
}
share->options= mi_uint2korr(share->state.header.options);
if (share->options &
~(HA_OPTION_PACK_RECORD | HA_OPTION_PACK_KEYS |
HA_OPTION_COMPRESS_RECORD | HA_OPTION_READ_ONLY_DATA |
HA_OPTION_TEMP_COMPRESS_RECORD | HA_OPTION_CHECKSUM |
HA_OPTION_TMP_TABLE | HA_OPTION_DELAY_KEY_WRITE))
{
DBUG_PRINT("error",("wrong options: 0x%lx",
share->options));
my_errno=HA_ERR_OLD_FILE;
goto err;
}
info_length=mi_uint2korr(share->state.header.header_length);
base_pos=mi_uint2korr(share->state.header.base_pos);
if (!(disk_cache=(char*) my_alloca(info_length)))
{
my_errno=ENOMEM;
goto err;
}
errpos=2;
VOID(my_seek(kfile,0L,MY_SEEK_SET,MYF(0)));
if (!(handle_locking & HA_OPEN_TMP_TABLE))
{
if ((lock_error=my_lock(kfile,F_RDLCK,0L,F_TO_EOF,
MYF(handle_locking & HA_OPEN_WAIT_IF_LOCKED ?
0 : MY_DONT_WAIT))) &&
!(handle_locking & HA_OPEN_IGNORE_IF_LOCKED))
goto err;
}
errpos=3;
if (my_read(kfile,disk_cache,info_length,MYF(MY_NABP)))
goto err;
len=mi_uint2korr(share->state.header.state_info_length);
keys= (uint) share->state.header.keys;
uniques= (uint) share->state.header.uniques;
key_parts= mi_uint2korr(share->state.header.key_parts);
unique_key_parts= mi_uint2korr(share->state.header.unique_key_parts);
tmp_length=(MI_STATE_INFO_SIZE + keys * MI_STATE_KEY_SIZE +
key_parts*MI_STATE_KEYSEG_SIZE +
share->state.header.max_block_size*MI_STATE_KEYBLOCK_SIZE);
if (len != MI_STATE_INFO_SIZE)
{
DBUG_PRINT("warning",
("saved_state_info_length: %d state_info_length: %d",
len,MI_STATE_INFO_SIZE));
}
share->state_diff_length=len-MI_STATE_INFO_SIZE;
mi_state_info_read(disk_cache, &share->state);
len= mi_uint2korr(share->state.header.base_info_length);
if (len != MI_BASE_INFO_SIZE)
{
DBUG_PRINT("warning",("saved_base_info_length: %d base_info_length: %d",
len,MI_BASE_INFO_SIZE))
}
disk_pos=my_n_base_info_read(disk_cache+base_pos, &share->base);
share->state.state_length=base_pos;
/* Correct max_file_length based on length of sizeof_t */
max_data_file_length=
(share->options & (HA_OPTION_PACK_RECORD | HA_OPTION_COMPRESS_RECORD)) ?
(((ulonglong) 1 << (share->base.rec_reflength*8))-1) :
(mi_safe_mul(share->base.reclength,
(ulonglong) 1 << (share->base.rec_reflength*8))-1);
max_key_file_length=
mi_safe_mul(MI_KEY_BLOCK_LENGTH,
((ulonglong) 1 << (share->base.key_reflength*8))-1);
#if SIZEOF_OFF_T == 4
set_if_smaller(max_data_file_length, INT_MAX32);
set_if_smaller(max_key_file_length, INT_MAX32);
#endif
#if USE_RAID && SYSTEM_SIZEOF_OFF_T == 4
set_if_smaller(max_key_file_length, INT_MAX32);
if (!share->base.raid_type)
{
set_if_smaller(max_data_file_length, INT_MAX32);
}
else
{
set_if_smaller(max_data_file_length,
(ulonglong) share->base.raid_chunks << 31);
}
#elif !defined(USE_RAID)
if (share->base.raid_type)
{
my_errno=HA_ERR_UNSUPPORTED;
goto err;
}
#endif
share->base.max_data_file_length=(my_off_t) max_data_file_length;
share->base.max_key_file_length=(my_off_t) max_key_file_length;
if (share->base.max_key_length > MI_MAX_KEY_BUFF || keys > MI_MAX_KEY ||
key_parts >= MI_MAX_KEY * MI_MAX_KEY_SEG)
{
my_errno=HA_ERR_UNSUPPORTED;
goto err;
}
if (share->options & HA_OPTION_COMPRESS_RECORD)
share->base.max_key_length+=2; /* For safety */
if (!my_multi_malloc(MY_WME,
&share,sizeof(*share),
&share->state.rec_per_key_part,sizeof(long)*key_parts,
&share->keyinfo,keys*sizeof(MI_KEYDEF),
&share->uniqueinfo,uniques*sizeof(MI_UNIQUEDEF),
&share->keyparts,
(key_parts+unique_key_parts+keys+uniques) *
sizeof(MI_KEYSEG),
&share->rec,
(share->base.fields+1)*sizeof(MI_COLUMNDEF),
&share->blobs,sizeof(MI_BLOB)*share->base.blobs,
&share->filename,strlen(name_buff)+1,
&share->state.key_root,keys*sizeof(my_off_t),
&share->state.key_del,
(share->state.header.max_block_size*sizeof(my_off_t)),
#ifdef THREAD
&share->key_root_lock,sizeof(rw_lock_t)*keys,
#endif
NullS))
goto err;
errpos=4;
*share=share_buff;
memcpy((char*) share->state.rec_per_key_part,
(char*) rec_per_key_part, sizeof(long)*key_parts);
memcpy((char*) share->state.key_root,
(char*) key_root, sizeof(my_off_t)*keys);
memcpy((char*) share->state.key_del,
(char*) key_del, (sizeof(my_off_t) *
share->state.header.max_block_size));
strmov(share->filename,name_buff);
share->blocksize=min(IO_SIZE,myisam_block_size);
{
MI_KEYSEG *pos=share->keyparts;
for (i=0 ; i < keys ; i++)
{
disk_pos=mi_keydef_read(disk_pos, &share->keyinfo[i]);
set_if_smaller(share->blocksize,share->keyinfo[i].block_length);
share->keyinfo[i].seg=pos;
for (j=0 ; j < share->keyinfo[i].keysegs; j++,pos++)
{
disk_pos=mi_keyseg_read(disk_pos, pos);
if (pos->type == HA_KEYTYPE_TEXT || pos->type == HA_KEYTYPE_VARTEXT)
{
if (!pos->language)
pos->charset=default_charset_info;
else if (!(pos->charset= get_charset(pos->language, MYF(MY_WME))))
{
my_errno=HA_ERR_UNKNOWN_CHARSET;
goto err;
}
}
}
if (share->keyinfo[i].flag & HA_FULLTEXT) /* SerG */
share->keyinfo[i].seg=pos-FT_SEGS; /* SerG */
share->keyinfo[i].end=pos;
pos->type=HA_KEYTYPE_END; /* End */
pos->length=share->base.rec_reflength;
pos->null_bit=0;
pos++;
}
for (i=0 ; i < uniques ; i++)
{
disk_pos=mi_uniquedef_read(disk_pos, &share->uniqueinfo[i]);
share->uniqueinfo[i].seg=pos;
for (j=0 ; j < share->uniqueinfo[i].keysegs; j++,pos++)
{
disk_pos=mi_keyseg_read(disk_pos, pos);
if (pos->type == HA_KEYTYPE_TEXT || pos->type == HA_KEYTYPE_VARTEXT)
{
if (!pos->language)
pos->charset=default_charset_info;
else if (!(pos->charset= get_charset(pos->language, MYF(MY_WME))))
{
my_errno=HA_ERR_UNKNOWN_CHARSET;
goto err;
}
}
}
share->uniqueinfo[i].end=pos;
pos->type=HA_KEYTYPE_END; /* End */
pos->null_bit=0;
pos++;
}
}
for (i=0 ; i < keys ; i++)
setup_key_functions(share->keyinfo+i);
for (i=j=offset=0 ; i < share->base.fields ; i++)
{
disk_pos=mi_recinfo_read(disk_pos,&share->rec[i]);
share->rec[i].pack_type=0;
share->rec[i].huff_tree=0;
share->rec[i].offset=offset;
if (share->rec[i].type == (int) FIELD_BLOB)
{
share->blobs[j].pack_length=
share->rec[i].length-mi_portable_sizeof_char_ptr;;
share->blobs[j].offset=offset;
j++;
}
offset+=share->rec[i].length;
}
share->rec[i].type=(int) FIELD_LAST; /* End marker */
if (! lock_error)
{
VOID(my_lock(kfile,F_UNLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE)));
lock_error=1; /* Database unlocked */
}
#ifdef USE_RAID
if (share->base.raid_type)
{
if ((info.dfile=my_raid_open(fn_format(name_buff,name,"",MI_NAME_DEXT,
2+4),
mode | O_SHARE,
share->base.raid_type,
share->base.raid_chunks,
share->base.raid_chunksize,
MYF(MY_WME | MY_RAID))) < 0)
goto err;
}
else
#endif
if ((info.dfile=my_open(fn_format(name_buff,name,"",MI_NAME_DEXT,2+4),
mode | O_SHARE,
MYF(MY_WME))) < 0)
goto err;
errpos=5;
share->kfile=kfile;
share->mode=open_mode;
share->this_process=(ulong) getpid();
share->rnd= (int) share->this_process; /* rnd-counter for splits */
#ifndef DBUG_OFF
share->rnd=0; /* To make things repeatable */
#endif
share->last_process= share->state.process;
share->base.key_parts=key_parts;
share->base.all_key_parts=key_parts+unique_key_parts;
if (!(share->last_version=share->state.version))
share->last_version=1; /* Safety */
share->rec_reflength=share->base.rec_reflength; /* May be changed */
share->base.margin_key_file_length=(share->base.max_key_file_length -
(keys ? MI_INDEX_BLOCK_MARGIN *
share->blocksize * keys : 0));
share->blocksize=min(IO_SIZE,myisam_block_size);
share->data_file_type=STATIC_RECORD;
if (share->options & HA_OPTION_COMPRESS_RECORD)
{
share->data_file_type = COMPRESSED_RECORD;
share->options|= HA_OPTION_READ_ONLY_DATA;
info.s=share;
if (_mi_read_pack_info(&info,
(pbool)
test(!(share->options &
(HA_OPTION_PACK_RECORD |
HA_OPTION_TEMP_COMPRESS_RECORD)))))
goto err;
}
else if (share->options & HA_OPTION_PACK_RECORD)
share->data_file_type = DYNAMIC_RECORD;
my_afree((gptr) disk_cache);
setup_functions(share);
#ifdef THREAD
thr_lock_init(&share->lock);
VOID(pthread_mutex_init(&share->intern_lock,NULL));
for (i=0; i<keys; i++)
VOID(my_rwlock_init(&share->key_root_lock[i], NULL));
if (!thr_lock_inited)
{
/* Probably a single threaded program; Don't use concurrent inserts */
myisam_concurrent_insert=0;
}
else if (myisam_concurrent_insert)
{
share->concurrent_insert=
((share->options & (HA_OPTION_READ_ONLY_DATA | HA_OPTION_TMP_TABLE |
HA_OPTION_COMPRESS_RECORD |
HA_OPTION_TEMP_COMPRESS_RECORD)) ||
(handle_locking & HA_OPEN_TMP_TABLE)) ? 0 : 1;
if (share->concurrent_insert)
{
share->lock.get_status=mi_get_status;
share->lock.copy_status=mi_copy_status;
share->lock.update_status=mi_update_status;
share->lock.check_status=mi_check_status;
}
}
#endif
}
else
{
share= old_info->s;
if (mode == O_RDWR && share->mode == O_RDONLY)
{
my_errno=EACCES; /* Can't open in write mode */
goto err;
}
#ifdef USE_RAID
if (share->base.raid_type)
{
if ((info.dfile=my_raid_open(fn_format(name_buff,old_info->filename,"",
MI_NAME_DEXT, 2+4),
mode | O_SHARE,
share->base.raid_type,
share->base.raid_chunks,
share->base.raid_chunksize,
MYF(MY_WME | MY_RAID))) < 0)
goto err;
}
else
#endif
if ((info.dfile=my_open(fn_format(name_buff,old_info->filename,"",
MI_NAME_DEXT,2+4),
mode | O_SHARE,MYF(MY_WME))) < 0)
{
my_errno=errno;
goto err;
}
errpos=5;
}
/* alloc and set up private structure parts */
if (!my_multi_malloc(MY_WME,
&m_info,sizeof(MI_INFO),
&info.blobs,sizeof(MI_BLOB)*share->base.blobs,
&info.buff,(share->base.max_key_block_length*2+
share->base.max_key_length),
&info.lastkey,share->base.max_key_length*3+1,
&info.filename,strlen(name)+1,
NullS))
goto err;
errpos=6;
strmov(info.filename,name);
memcpy(info.blobs,share->blobs,sizeof(MI_BLOB)*share->base.blobs);
info.lastkey2=info.lastkey+share->base.max_key_length;
info.s=share;
info.lastpos= HA_OFFSET_ERROR;
info.update= (short) (HA_STATE_NEXT_FOUND+HA_STATE_PREV_FOUND);
info.opt_flag=READ_CHECK_USED;
info.this_unique= (ulong) info.dfile; /* Uniq number in process */
if (share->data_file_type == COMPRESSED_RECORD)
info.this_unique= share->state.unique;
info.this_loop=0; /* Update counter */
info.last_unique= share->state.unique;
if (mode == O_RDONLY)
share->options|=HA_OPTION_READ_ONLY_DATA;
info.lock_type=F_UNLCK;
info.quick_mode=0;
info.errkey= -1;
info.page_changed=1;
pthread_mutex_lock(&share->intern_lock);
info.read_record=share->read_record;
share->reopen++;
share->write_flag=MYF(MY_NABP | MY_WAIT_IF_FULL);
if (share->options & HA_OPTION_READ_ONLY_DATA)
{
info.lock_type=F_RDLCK;
share->r_locks++;
}
if ((handle_locking & HA_OPEN_TMP_TABLE) ||
(share->options & HA_OPTION_TMP_TABLE))
{
share->temporary=share->delay_key_write=1;
share->write_flag=MYF(MY_NABP);
share->w_locks++; /* We don't have to update status */
info.lock_type=F_WRLCK;
}
if (((handle_locking & HA_OPEN_DELAY_KEY_WRITE) ||
(share->options & HA_OPTION_DELAY_KEY_WRITE)) &&
myisam_delay_key_write)
share->delay_key_write=1;
info.state= &share->state.state; /* Change global values by default */
pthread_mutex_unlock(&share->intern_lock);
/* Allocate buffer for one record */
extra=0;
if (share->options & HA_OPTION_PACK_RECORD)
extra=ALIGN_SIZE(MI_MAX_DYN_BLOCK_HEADER)+MI_SPLIT_LENGTH+
MI_DYN_DELETE_BLOCK_HEADER;
tmp_length=max(share->base.pack_reclength,share->base.max_key_length);
info.alloced_rec_buff_length=tmp_length;
if (!(info.rec_alloc=(byte*) my_malloc(tmp_length+extra+8,
MYF(MY_WME | MY_ZEROFILL))))
goto err;
if (extra)
info.rec_buff=info.rec_alloc+ALIGN_SIZE(MI_MAX_DYN_BLOCK_HEADER);
else
info.rec_buff=info.rec_alloc;
*m_info=info;
#ifdef THREAD
thr_lock_data_init(&share->lock,&m_info->lock,(void*) m_info);
#endif
m_info->open_list.data=(void*) m_info;
myisam_open_list=list_add(myisam_open_list,&m_info->open_list);
pthread_mutex_unlock(&THR_LOCK_myisam);
myisam_log(MI_LOG_OPEN,m_info,share->filename,(uint) strlen(share->filename));
DBUG_RETURN(m_info);
err:
save_errno=my_errno ? my_errno : HA_ERR_END_OF_FILE;
switch (errpos) {
case 6:
my_free((gptr) m_info,MYF(0));
/* fall through */
case 5:
VOID(my_close(info.dfile,MYF(0)));
if (old_info)
break; /* Don't remove open table */
/* fall through */
case 4:
my_free((gptr) share,MYF(0));
/* fall through */
case 3:
if (! lock_error)
VOID(my_lock(kfile, F_UNLCK, 0L, F_TO_EOF, MYF(MY_SEEK_NOT_DONE)));
/* fall through */
case 2:
my_afree((gptr) disk_cache);
/* fall through */
case 1:
VOID(my_close(kfile,MYF(0)));
/* fall through */
case 0:
default:
break;
}
pthread_mutex_unlock(&THR_LOCK_myisam);
my_errno=save_errno;
DBUG_RETURN (NULL);
} /* mi_open */
ulonglong mi_safe_mul(ulonglong a, ulonglong b)
{
ulonglong max_val= ~ (ulonglong) 0; /* my_off_t is unsigned */
if (!a || max_val / a < b)
return max_val;
return a*b;
}
/* Set up functions in structs */
static void setup_functions(register MYISAM_SHARE *share)
{
if (share->options & HA_OPTION_COMPRESS_RECORD)
{
share->read_record=_mi_read_pack_record;
share->read_rnd=_mi_read_rnd_pack_record;
if (!(share->options & HA_OPTION_TEMP_COMPRESS_RECORD))
share->calc_checksum=0; /* No checksum */
else if (share->options & HA_OPTION_PACK_RECORD)
share->calc_checksum= mi_checksum;
else
share->calc_checksum= mi_static_checksum;
}
else if (share->options & HA_OPTION_PACK_RECORD)
{
share->read_record=_mi_read_dynamic_record;
share->read_rnd=_mi_read_rnd_dynamic_record;
share->delete_record=_mi_delete_dynamic_record;
share->compare_record=_mi_cmp_dynamic_record;
share->compare_unique=_mi_cmp_dynamic_unique;
share->calc_checksum= mi_checksum;
if (share->base.blobs)
{
share->update_record=_mi_update_blob_record;
share->write_record=_mi_write_blob_record;
}
else
{
share->write_record=_mi_write_dynamic_record;
share->update_record=_mi_update_dynamic_record;
}
}
else
{
share->read_record=_mi_read_static_record;
share->read_rnd=_mi_read_rnd_static_record;
share->delete_record=_mi_delete_static_record;
share->compare_record=_mi_cmp_static_record;
share->update_record=_mi_update_static_record;
share->write_record=_mi_write_static_record;
share->compare_unique=_mi_cmp_static_unique;
share->calc_checksum= mi_static_checksum;
}
if (!(share->options & HA_OPTION_CHECKSUM))
share->calc_checksum=0;
return;
}
static void setup_key_functions(register MI_KEYDEF *keyinfo)
{
if (keyinfo->flag & HA_BINARY_PACK_KEY)
{ /* Simple prefix compression */
keyinfo->bin_search=_mi_seq_search;
keyinfo->get_key=_mi_get_binary_pack_key;
keyinfo->pack_key=_mi_calc_bin_pack_key_length;
keyinfo->store_key=_mi_store_bin_pack_key;
}
else if (keyinfo->flag & HA_VAR_LENGTH_KEY)
{
keyinfo->bin_search=_mi_seq_search;
keyinfo->get_key= _mi_get_pack_key;
if (keyinfo->seg[0].flag & HA_PACK_KEY)
{ /* Prefix compression */
keyinfo->pack_key=_mi_calc_var_pack_key_length;
keyinfo->store_key=_mi_store_var_pack_key;
}
else
{
keyinfo->pack_key=_mi_calc_var_key_length; /* Variable length key */
keyinfo->store_key=_mi_store_static_key;
}
}
else
{
keyinfo->bin_search=_mi_bin_search;
keyinfo->get_key=_mi_get_static_key;
keyinfo->pack_key=_mi_calc_static_key_length;
keyinfo->store_key=_mi_store_static_key;
}
return;
}
/***************************************************************************
** Function to save and store the header in the index file (.MSI)
***************************************************************************/
uint mi_state_info_write(File file, MI_STATE_INFO *state, uint pWrite)
{
uchar buff[MI_STATE_INFO_SIZE + MI_STATE_EXTRA_SIZE];
uchar *ptr=buff;
uint i, keys= (uint) state->header.keys,
key_blocks=state->header.max_block_size;
memcpy_fixed(ptr,&state->header,sizeof(state->header));
ptr+=sizeof(state->header);
/* open_count must be first because of _mi_mark_file_changed ! */
mi_int2store(ptr,state->open_count); ptr +=2;
*ptr++= (uchar)state->changed; *ptr++= state->sortkey;
mi_rowstore(ptr,state->state.records); ptr +=8;
mi_rowstore(ptr,state->state.del); ptr +=8;
mi_rowstore(ptr,state->split); ptr +=8;
mi_sizestore(ptr,state->dellink); ptr +=8;
mi_sizestore(ptr,state->state.key_file_length); ptr +=8;
mi_sizestore(ptr,state->state.data_file_length); ptr +=8;
mi_sizestore(ptr,state->state.empty); ptr +=8;
mi_sizestore(ptr,state->state.key_empty); ptr +=8;
mi_int8store(ptr,state->auto_increment); ptr +=8;
mi_int8store(ptr,(ulonglong) state->checksum);ptr +=8;
mi_int4store(ptr,state->process); ptr +=4;
mi_int4store(ptr,state->unique); ptr +=4;
mi_int4store(ptr,state->status); ptr +=4;
*ptr++=0; *ptr++=0; *ptr++=0; *ptr++=0; /* extra */
ptr+=state->state_diff_length;
for (i=0; i < keys; i++)
{
mi_sizestore(ptr,state->key_root[i]); ptr +=8;
}
for (i=0; i < key_blocks; i++)
{
mi_sizestore(ptr,state->key_del[i]); ptr +=8;
}
if (pWrite & 2) /* From isamchk */
{
uint key_parts= mi_uint2korr(state->header.key_parts);
mi_int4store(ptr,state->sec_index_changed); ptr +=4;
mi_int4store(ptr,state->sec_index_used); ptr +=4;
mi_int4store(ptr,state->version); ptr +=4;
mi_int8store(ptr,state->key_map); ptr +=8;
mi_int8store(ptr,(ulonglong) state->create_time); ptr +=8;
mi_int8store(ptr,(ulonglong) state->recover_time); ptr +=8;
mi_int8store(ptr,(ulonglong) state->check_time); ptr +=8;
mi_sizestore(ptr,state->rec_per_key_rows); ptr+=8;
for (i=0 ; i < key_parts ; i++)
{
mi_int4store(ptr,state->rec_per_key_part[i]); ptr+=4;
}
}
if (pWrite & 1)
return my_pwrite(file,(char*) buff, (uint) (ptr-buff), 0L,
MYF(MY_NABP | MY_THREADSAFE));
else
return my_write(file, (char*) buff, (uint) (ptr-buff), MYF(MY_NABP));
}
char *mi_state_info_read(char *ptr, MI_STATE_INFO *state)
{
uint i,keys,key_parts,key_blocks;
memcpy_fixed(&state->header,ptr, sizeof(state->header));
ptr +=sizeof(state->header);
keys=(uint) state->header.keys;
key_parts=mi_uint2korr(state->header.key_parts);
key_blocks=state->header.max_block_size;
state->open_count = mi_uint2korr(ptr); ptr +=2;
state->changed= (bool) *ptr++;
state->sortkey = (uint) *ptr++;
state->state.records= mi_rowkorr(ptr); ptr +=8;
state->state.del = mi_rowkorr(ptr); ptr +=8;
state->split = mi_rowkorr(ptr); ptr +=8;
state->dellink= mi_sizekorr(ptr); ptr +=8;
state->state.key_file_length = mi_sizekorr(ptr); ptr +=8;
state->state.data_file_length= mi_sizekorr(ptr); ptr +=8;
state->state.empty = mi_sizekorr(ptr); ptr +=8;
state->state.key_empty= mi_sizekorr(ptr); ptr +=8;
state->auto_increment=mi_uint8korr(ptr); ptr +=8;
state->checksum=(ha_checksum) mi_uint8korr(ptr); ptr +=8;
state->process= mi_uint4korr(ptr); ptr +=4;
state->unique = mi_uint4korr(ptr); ptr +=4;
state->status = mi_uint4korr(ptr); ptr +=4;
ptr +=4; /* extra */
for (i=0; i < keys; i++)
{
state->key_root[i]= mi_sizekorr(ptr); ptr +=8;
}
for (i=0; i < key_blocks; i++)
{
state->key_del[i] = mi_sizekorr(ptr); ptr +=8;
}
ptr+= state->state_diff_length;
state->sec_index_changed = mi_uint4korr(ptr); ptr +=4;
state->sec_index_used = mi_uint4korr(ptr); ptr +=4;
state->version = mi_uint4korr(ptr); ptr +=4;
state->key_map = mi_uint8korr(ptr); ptr +=8;
state->create_time = (time_t) mi_sizekorr(ptr); ptr +=8;
state->recover_time =(time_t) mi_sizekorr(ptr); ptr +=8;
state->check_time = (time_t) mi_sizekorr(ptr); ptr +=8;
state->rec_per_key_rows=mi_sizekorr(ptr); ptr +=8;
for (i=0 ; i < key_parts ; i++)
{
state->rec_per_key_part[i]= mi_uint4korr(ptr); ptr+=4;
}
return ptr;
}
uint mi_state_info_read_dsk(File file, MI_STATE_INFO *state, my_bool pRead)
{
char buff[MI_STATE_INFO_SIZE + MI_STATE_EXTRA_SIZE];
if (pRead)
{
if (my_pread(file, buff, state->state_length,0L, MYF(MY_NABP)))
return (MY_FILE_ERROR);
}
else if (my_read(file, buff, state->state_length,MYF(MY_NABP)))
return (MY_FILE_ERROR);
mi_state_info_read(buff, state);
return 0;
}
/****************************************************************************
** store and read of MI_BASE_INFO
****************************************************************************/
uint mi_base_info_write(File file, MI_BASE_INFO *base)
{
uchar buff[MI_BASE_INFO_SIZE], *ptr=buff;
mi_sizestore(ptr,base->keystart); ptr +=8;
mi_sizestore(ptr,base->max_data_file_length); ptr +=8;
mi_sizestore(ptr,base->max_key_file_length); ptr +=8;
mi_rowstore(ptr,base->records); ptr +=8;
mi_rowstore(ptr,base->reloc); ptr +=8;
mi_int4store(ptr,base->mean_row_length); ptr +=4;
mi_int4store(ptr,base->reclength); ptr +=4;
mi_int4store(ptr,base->pack_reclength); ptr +=4;
mi_int4store(ptr,base->min_pack_length); ptr +=4;
mi_int4store(ptr,base->max_pack_length); ptr +=4;
mi_int4store(ptr,base->min_block_length); ptr +=4;
mi_int4store(ptr,base->fields); ptr +=4;
mi_int4store(ptr,base->pack_fields); ptr +=4;
*ptr++=base->rec_reflength;
*ptr++=base->key_reflength;
*ptr++=base->keys;
*ptr++=base->auto_key;
mi_int2store(ptr,base->pack_bits); ptr +=2;
mi_int2store(ptr,base->blobs); ptr +=2;
mi_int2store(ptr,base->max_key_block_length); ptr +=2;
mi_int2store(ptr,base->max_key_length); ptr +=2;
mi_int2store(ptr,base->extra_alloc_bytes); ptr +=2;
*ptr++= base->extra_alloc_procent;
*ptr++= base->raid_type;
mi_int2store(ptr,base->raid_chunks); ptr +=2;
mi_int4store(ptr,base->raid_chunksize); ptr +=4;
bzero(ptr,6); ptr +=6; /* extra */
return my_write(file,(char*) buff, (uint) (ptr-buff), MYF(MY_NABP));
}
char *my_n_base_info_read(char *ptr, MI_BASE_INFO *base)
{
base->keystart = mi_sizekorr(ptr); ptr +=8;
base->max_data_file_length = mi_sizekorr(ptr); ptr +=8;
base->max_key_file_length = mi_sizekorr(ptr); ptr +=8;
base->records = (ha_rows) mi_sizekorr(ptr); ptr +=8;
base->reloc = (ha_rows) mi_sizekorr(ptr); ptr +=8;
base->mean_row_length = mi_uint4korr(ptr); ptr +=4;
base->reclength = mi_uint4korr(ptr); ptr +=4;
base->pack_reclength = mi_uint4korr(ptr); ptr +=4;
base->min_pack_length = mi_uint4korr(ptr); ptr +=4;
base->max_pack_length = mi_uint4korr(ptr); ptr +=4;
base->min_block_length = mi_uint4korr(ptr); ptr +=4;
base->fields = mi_uint4korr(ptr); ptr +=4;
base->pack_fields = mi_uint4korr(ptr); ptr +=4;
base->rec_reflength = *ptr++;
base->key_reflength = *ptr++;
base->keys= *ptr++;
base->auto_key= *ptr++;
base->pack_bits = mi_uint2korr(ptr); ptr +=2;
base->blobs = mi_uint2korr(ptr); ptr +=2;
base->max_key_block_length= mi_uint2korr(ptr); ptr +=2;
base->max_key_length = mi_uint2korr(ptr); ptr +=2;
base->extra_alloc_bytes = mi_uint2korr(ptr); ptr +=2;
base->extra_alloc_procent = *ptr++;
base->raid_type= *ptr++;
base->raid_chunks= mi_uint2korr(ptr); ptr +=2;
base->raid_chunksize= mi_uint4korr(ptr); ptr +=4;
/* TO BE REMOVED: Fix for old RAID files */
if (base->raid_type == 0)
{
base->raid_chunks=0;
base->raid_chunksize=0;
}
ptr+=6;
return ptr;
}
/*--------------------------------------------------------------------------
mi_keydef
---------------------------------------------------------------------------*/
uint mi_keydef_write(File file, MI_KEYDEF *keydef)
{
uchar buff[MI_KEYDEF_SIZE];
uchar *ptr=buff;
*ptr++ = (uchar) keydef->keysegs;
*ptr++ = 0; /* not used */
mi_int2store(ptr,keydef->flag); ptr +=2;
mi_int2store(ptr,keydef->block_length); ptr +=2;
mi_int2store(ptr,keydef->keylength); ptr +=2;
mi_int2store(ptr,keydef->minlength); ptr +=2;
mi_int2store(ptr,keydef->maxlength); ptr +=2;
return my_write(file,(char*) buff, (uint) (ptr-buff), MYF(MY_NABP));
}
char *mi_keydef_read(char *ptr, MI_KEYDEF *keydef)
{
keydef->keysegs = (uint) *ptr++;
ptr++;
keydef->flag = mi_uint2korr(ptr); ptr +=2;
keydef->block_length = mi_uint2korr(ptr); ptr +=2;
keydef->keylength = mi_uint2korr(ptr); ptr +=2;
keydef->minlength = mi_uint2korr(ptr); ptr +=2;
keydef->maxlength = mi_uint2korr(ptr); ptr +=2;
keydef->block_size = keydef->block_length/MI_KEY_BLOCK_LENGTH-1;
keydef->underflow_block_length=keydef->block_length/3;
keydef->version = 0; /* Not saved */
return ptr;
}
/***************************************************************************
** mi_keyseg
***************************************************************************/
int mi_keyseg_write(File file, const MI_KEYSEG *keyseg)
{
uchar buff[MI_KEYSEG_SIZE];
uchar *ptr=buff;
*ptr++ =keyseg->type;
*ptr++ =keyseg->language;
*ptr++ =keyseg->null_bit;
*ptr++ =keyseg->bit_start;
*ptr++ =keyseg->bit_end;
*ptr++ =0; /* Not used */
mi_int2store(ptr,keyseg->flag); ptr+=2;
mi_int2store(ptr,keyseg->length); ptr+=2;
mi_int4store(ptr,keyseg->start); ptr+=4;
mi_int4store(ptr,keyseg->null_pos); ptr+=4;
return my_write(file,(char*) buff, (uint) (ptr-buff), MYF(MY_NABP));
}
char *mi_keyseg_read(char *ptr, MI_KEYSEG *keyseg)
{
keyseg->type = *ptr++;
keyseg->language = *ptr++;
keyseg->null_bit = *ptr++;
keyseg->bit_start = *ptr++;
keyseg->bit_end = *ptr++;
ptr++;
keyseg->flag = mi_uint2korr(ptr); ptr +=2;
keyseg->length = mi_uint2korr(ptr); ptr +=2;
keyseg->start = mi_uint4korr(ptr); ptr +=4;
keyseg->null_pos = mi_uint4korr(ptr); ptr +=4;
keyseg->charset=0; /* Will be filled in later */
return ptr;
}
/*--------------------------------------------------------------------------
mi_uniquedef
---------------------------------------------------------------------------*/
uint mi_uniquedef_write(File file, MI_UNIQUEDEF *def)
{
uchar buff[MI_UNIQUEDEF_SIZE];
uchar *ptr=buff;
mi_int2store(ptr,def->keysegs); ptr+=2;
*ptr++= (uchar) def->key;
*ptr++ = (uchar) def->null_are_equal;
return my_write(file,(char*) buff, (uint) (ptr-buff), MYF(MY_NABP));
}
char *mi_uniquedef_read(char *ptr, MI_UNIQUEDEF *def)
{
def->keysegs = mi_uint2korr(ptr);
def->key = ptr[2];
def->null_are_equal=ptr[3];
return ptr+4; /* 1 extra byte */
}
/***************************************************************************
** MI_COLUMNDEF
***************************************************************************/
uint mi_recinfo_write(File file, MI_COLUMNDEF *recinfo)
{
uchar buff[MI_COLUMNDEF_SIZE];
uchar *ptr=buff;
mi_int2store(ptr,recinfo->type); ptr +=2;
mi_int2store(ptr,recinfo->length); ptr +=2;
*ptr++ = recinfo->null_bit;
mi_int2store(ptr,recinfo->null_pos); ptr+= 2;
return my_write(file,(char*) buff, (uint) (ptr-buff), MYF(MY_NABP));
}
char *mi_recinfo_read(char *ptr, MI_COLUMNDEF *recinfo)
{
recinfo->type= mi_sint2korr(ptr); ptr +=2;
recinfo->length=mi_uint2korr(ptr); ptr +=2;
recinfo->null_bit= (uint8) *ptr++;
recinfo->null_pos=mi_uint2korr(ptr); ptr +=2;
return ptr;
}
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