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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 MYMERGE_-database */
#include "mymrgdef.h"
#include <stddef.h>
#include <errno.h>
#ifdef VMS
#include "mrg_static.c"
#endif
/* open a MYMERGE_-database.
if handle_locking is 0 then exit with error if some database is locked
if handle_locking is 1 then wait if database is locked
*/
MYRG_INFO *myrg_open(
const char *name,
int mode,
int handle_locking)
{
int save_errno,errpos;
uint files,dir_length,length;
ulonglong file_offset;
char name_buff[FN_REFLEN*2],buff[FN_REFLEN],*end;
MYRG_INFO *m_info;
File fd;
IO_CACHE file;
MI_INFO *isam;
DBUG_ENTER("myrg_open");
LINT_INIT(m_info);
isam=0;
errpos=files=0;
bzero((char*) &file,sizeof(file));
if ((fd=my_open(fn_format(name_buff,name,"",MYRG_NAME_EXT,4),
O_RDONLY | O_SHARE,MYF(0))) < 0)
goto err;
errpos=1;
if (init_io_cache(&file, fd, 4*IO_SIZE, READ_CACHE, 0, 0,
MYF(MY_WME | MY_NABP)))
goto err;
errpos=2;
dir_length=dirname_part(name_buff,name);
while ((length=my_b_gets(&file,buff,FN_REFLEN-1)))
{
if ((end=buff+length)[-1] == '\n')
end[-1]='\0';
if (buff[0] && buff[0] != '#') /* Skipp empty lines and comments */
{
files++;
}
}
if (!(m_info= (MYRG_INFO*) my_malloc(sizeof(MYRG_INFO)+
files*sizeof(MYRG_TABLE),
MYF(MY_WME|MY_ZEROFILL))))
goto err;
errpos=3;
m_info->open_tables=(files) ? (MYRG_TABLE *) (m_info+1) : 0;
m_info->tables=files;
files=0;
file_offset=0;
my_b_seek(&file, 0);
while ((length=my_b_gets(&file,buff,FN_REFLEN-1)))
{
if ((end=buff+length)[-1] == '\n')
end[-1]='\0';
if (buff[0] && buff[0] == '#') /* Skipp empty lines and comments */
continue;
if (!test_if_hard_path(buff))
{
VOID(strmake(name_buff+dir_length,buff,
sizeof(name_buff)-1-dir_length));
VOID(cleanup_dirname(buff,name_buff));
}
if (!(isam=mi_open(buff,mode,test(handle_locking))))
goto err;
m_info->open_tables[files].table= isam;
m_info->open_tables[files].file_offset=(my_off_t) file_offset;
file_offset+=isam->state->data_file_length;
files++;
if (m_info->reclength && (m_info->reclength != isam->s->base.reclength))
{
my_errno=HA_ERR_WRONG_IN_RECORD;
goto err;
}
m_info->reclength=isam->s->base.reclength;
m_info->options|= isam->s->options;
m_info->records+= isam->state->records;
m_info->del+= isam->state->del;
m_info->data_file_length+= isam->state->data_file_length;
}
if (sizeof(my_off_t) == 4 && file_offset > (ulonglong) (ulong) ~0L)
{
my_errno=HA_ERR_RECORD_FILE_FULL;
goto err;
}
m_info->keys=(files) ? isam->s->base.keys : 0;
bzero((char*) &m_info->by_key,sizeof(m_info->by_key));
/* this works ok if the table list is empty */
m_info->end_table=m_info->open_tables+files;
m_info->last_used_table=m_info->open_tables;
VOID(my_close(fd,MYF(0)));
end_io_cache(&file);
m_info->open_list.data=(void*) m_info;
pthread_mutex_lock(&THR_LOCK_open);
myrg_open_list=list_add(myrg_open_list,&m_info->open_list);
pthread_mutex_unlock(&THR_LOCK_open);
DBUG_RETURN(m_info);
err:
save_errno=my_errno;
switch (errpos) {
case 3:
while (files)
mi_close(m_info->open_tables[--files].table);
my_free((char*) m_info,MYF(0));
/* Fall through */
case 2:
end_io_cache(&file);
/* Fall through */
case 1:
VOID(my_close(fd,MYF(0)));
}
my_errno=save_errno;
DBUG_RETURN (NULL);
}
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