diff options
Diffstat (limited to 'isam/_page.c')
| -rw-r--r-- | isam/_page.c | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/isam/_page.c b/isam/_page.c deleted file mode 100644 index e31115e624f..00000000000 --- a/isam/_page.c +++ /dev/null @@ -1,143 +0,0 @@ -/* 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 */ - -/* L{ser och skriver nyckelblock */ - -#include "isamdef.h" -#ifdef __WIN__ -#include <errno.h> -#endif - - /* Fetch a key-page in memory */ - -uchar *_nisam_fetch_keypage(register N_INFO *info, N_KEYDEF *keyinfo, - my_off_t page, uchar *buff, int return_buffer) -{ - uchar *tmp; - tmp=(uchar*) key_cache_read(dflt_key_cache, - info->s->kfile,page,DFLT_INIT_HITS,(byte*) buff, - (uint) keyinfo->base.block_length, - (uint) keyinfo->base.block_length, - return_buffer); - if (tmp == info->buff) - { - info->update|=HA_STATE_BUFF_SAVED; - info->int_pos=(ulong) page; - info->buff_used=1; - } - else - { - info->update&= ~HA_STATE_BUFF_SAVED; - if (tmp) - info->int_pos=(ulong) page; - else - { - info->int_pos=NI_POS_ERROR; - DBUG_PRINT("error",("Got errno: %d from key_cache_read",my_errno)); - my_errno=HA_ERR_CRASHED; - } - } - return tmp; -} /* _nisam_fetch_keypage */ - - - /* Write a key-page on disk */ - -int _nisam_write_keypage(register N_INFO *info, register N_KEYDEF *keyinfo, - my_off_t page, uchar *buff) -{ - reg3 uint length; -#ifndef QQ /* Safety check */ - if (page < info->s->base.keystart || - page+keyinfo->base.block_length > info->s->state.key_file_length || - page & (nisam_block_size-1)) - { - DBUG_PRINT("error",("Trying to write outside key region: %lu", - (long) page)); - my_errno=EINVAL; - return(-1); - } - DBUG_PRINT("page",("write page at: %lu",(long) page,buff)); - DBUG_DUMP("buff",(byte*) buff,getint(buff)); -#endif - - if ((length=keyinfo->base.block_length) > IO_SIZE*2 && - info->s->state.key_file_length != page+length) - length= ((getint(buff)+IO_SIZE-1) & (uint) ~(IO_SIZE-1)); -#ifdef HAVE_purify - { - length=getint(buff); - bzero((byte*) buff+length,keyinfo->base.block_length-length); - length=keyinfo->base.block_length; - } -#endif - return (key_cache_write(dflt_key_cache, - info->s->kfile,page,DFLT_INIT_HITS, - (byte*) buff,length, - (uint) keyinfo->base.block_length, - (int) (info->lock_type != F_UNLCK))); -} /* nisam_write_keypage */ - - - /* Remove page from disk */ - -int _nisam_dispose(register N_INFO *info, N_KEYDEF *keyinfo, my_off_t pos) -{ - uint keynr= (uint) (keyinfo - info->s->keyinfo); - ulong old_link; /* ulong is ok here */ - DBUG_ENTER("_nisam_dispose"); - - old_link=info->s->state.key_del[keynr]; - info->s->state.key_del[keynr]=(ulong) pos; - DBUG_RETURN(key_cache_write(dflt_key_cache, - info->s->kfile,pos,DFLT_INIT_HITS, - (byte*) &old_link, - sizeof(long), - (uint) keyinfo->base.block_length, - (int) (info->lock_type != F_UNLCK))); -} /* _nisam_dispose */ - - - /* Make new page on disk */ - -ulong _nisam_new(register N_INFO *info, N_KEYDEF *keyinfo) -{ - uint keynr= (uint) (keyinfo - info->s->keyinfo); - ulong pos; - DBUG_ENTER("_nisam_new"); - - if ((pos=info->s->state.key_del[keynr]) == NI_POS_ERROR) - { - if (info->s->state.key_file_length >= info->s->base.max_key_file_length) - { - my_errno=HA_ERR_INDEX_FILE_FULL; - DBUG_RETURN(NI_POS_ERROR); - } - pos=info->s->state.key_file_length; - info->s->state.key_file_length+= keyinfo->base.block_length; - } - else - { - if (!key_cache_read(dflt_key_cache, - info->s->kfile,pos,DFLT_INIT_HITS, - (byte*) &info->s->state.key_del[keynr], - (uint) sizeof(long), - (uint) keyinfo->base.block_length,0)) - pos= NI_POS_ERROR; - } - DBUG_PRINT("exit",("Pos: %d",pos)); - DBUG_RETURN(pos); -} /* _nisam_new */ |