~drizzle-trunk/drizzle/development

/* Copyright (C) 2000-2001, 2003-2004 MySQL 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; 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

/* Return useful base information for an open table */

#include "myisamdef.h"

#ifdef	__WIN__

#include <sys/stat.h>

#endif

	/* Get position to last record */

my_off_t mi_position(MI_INFO *info)

{

  return info->lastpos;

}

/* Get information about the table */

/* if flag == 2 one get current info (no sync from database */

int mi_status(MI_INFO *info, register MI_ISAMINFO *x, uint flag)

{

  struct stat state;

  MYISAM_SHARE *share=info->s;

  DBUG_ENTER("mi_status");

  x->recpos  = info->lastpos;

  if (flag == HA_STATUS_POS)

    DBUG_RETURN(0);				/* Compatible with ISAM */

  if (!(flag & HA_STATUS_NO_LOCK))

  {

    pthread_mutex_lock(&share->intern_lock);

    VOID(_mi_readinfo(info,F_RDLCK,0));

    fast_mi_writeinfo(info);

    pthread_mutex_unlock(&share->intern_lock);

  }

  if (flag & HA_STATUS_VARIABLE)

  {

    x->records	 	= info->state->records;

    x->deleted	 	= info->state->del;

    x->delete_length	= info->state->empty;

    x->data_file_length	=info->state->data_file_length;

    x->index_file_length=info->state->key_file_length;

    x->keys	 	= share->state.header.keys;

    x->check_time	= share->state.check_time;

    x->mean_reclength= x->records ?

      (ulong) ((x->data_file_length - x->delete_length) / x->records) :

      (ulong) share->min_pack_length;

  }

  if (flag & HA_STATUS_ERRKEY)

  {

    x->errkey	 = info->errkey;

    x->dupp_key_pos= info->dupp_key_pos;

  }

  if (flag & HA_STATUS_CONST)

  {

    x->reclength	= share->base.reclength;

    x->max_data_file_length=share->base.max_data_file_length;

    x->max_index_file_length=info->s->base.max_key_file_length;

    x->filenr	 = info->dfile;

    x->options	 = share->options;

    x->create_time=share->state.create_time;

    x->reflength= mi_get_pointer_length(share->base.max_data_file_length,

                                        myisam_data_pointer_size);

    x->record_offset= ((share->options &

			(HA_OPTION_PACK_RECORD | HA_OPTION_COMPRESS_RECORD)) ?

		       0L : share->base.pack_reclength);

    x->sortkey= -1;				/* No clustering */

    x->rec_per_key	= share->state.rec_per_key_part;

    x->key_map	 	= share->state.key_map;

    x->data_file_name   = share->data_file_name;

    x->index_file_name  = share->index_file_name;

  }

  if ((flag & HA_STATUS_TIME) && !fstat(info->dfile,&state))

    x->update_time=state.st_mtime;

  else

    x->update_time=0;

  if (flag & HA_STATUS_AUTO)

  {

    x->auto_increment= share->state.auto_increment+1;

    if (!x->auto_increment)			/* This shouldn't happen */

      x->auto_increment= ~(ulonglong) 0;

  }

  DBUG_RETURN(0);

}

/*

  Write a message to the error log.

  SYNOPSIS

    mi_report_error()

    file_name                   Name of table file (e.g. index_file_name).

    errcode                     Error number.

  DESCRIPTION

    This function supplies my_error() with a table name. Most error

    messages need one. Since string arguments in error messages are limited

    to 64 characters by convention, we ensure that in case of truncation,

    that the end of the index file path is in the message. This contains

    the most valuable information (the table name and the database name).

  RETURN

    void

*/

void mi_report_error(int errcode, const char *file_name)

{

  size_t        lgt;

  DBUG_ENTER("mi_report_error");

  DBUG_PRINT("enter",("errcode %d, table '%s'", errcode, file_name));

  if ((lgt= strlen(file_name)) > 64)

    file_name+= lgt - 64;

  my_error(errcode, MYF(ME_NOREFRESH), file_name);

  DBUG_VOID_RETURN;

}