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(info->s->kfile,page,(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 */
my_off_t _mi_new(MI_INFO *info, MI_KEYDEF *keyinfo, int level)
{
my_off_t pos;
uchar buff[8];
DBUG_ENTER("_mi_new");
if ((pos= info->s->state.key_del[keyinfo->block_size_index]) ==
HA_OFFSET_ERROR)
{
if (info->state->key_file_length >=
info->s->base.max_key_file_length - keyinfo->block_length)
{
set_my_errno(HA_ERR_INDEX_FILE_FULL);
DBUG_RETURN(HA_OFFSET_ERROR);
}
pos=info->state->key_file_length;
info->state->key_file_length+= keyinfo->block_length;
}
else
{
if (!key_cache_read(info->s->key_cache,
keycache_thread_var(),
info->s->kfile, pos, level,
buff,
(uint) sizeof(buff),
(uint) keyinfo->block_length,0))
pos= HA_OFFSET_ERROR;
else
info->s->state.key_del[keyinfo->block_size_index]= mi_sizekorr(buff);
}
info->s->state.changed|= STATE_NOT_SORTED_PAGES;
DBUG_PRINT("exit",("Pos: %ld",(long) pos));
DBUG_RETURN(pos);
} /* _mi_new */
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(info->s->kfile,pos,
(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 */
uchar *_mi_fetch_keypage(MI_INFO *info, MI_KEYDEF *keyinfo,
my_off_t page, int level,
uchar *buff, int return_buffer)
{
uchar *tmp;
uint page_size;
DBUG_ENTER("_mi_fetch_keypage");
DBUG_PRINT("enter",("page: %ld", (long) page));
tmp=(uchar*) key_cache_read(info->s->key_cache,
keycache_thread_var(),
info->s->kfile, page, level, (uchar*) buff,
(uint) keyinfo->block_length,
(uint) keyinfo->block_length,
return_buffer);
if (tmp == info->buff)
info->buff_used=1;
else if (!tmp)
{
DBUG_PRINT("error",("Got errno: %d from key_cache_read",my_errno()));
info->last_keypage=HA_OFFSET_ERROR;
mi_print_error(info->s, HA_ERR_CRASHED);
set_my_errno(HA_ERR_CRASHED);
DBUG_RETURN(0);
}
info->last_keypage=page;
page_size=mi_getint(tmp);
if (page_size < 4 || page_size > keyinfo->block_length)
{
DBUG_PRINT("error",("page %lu had wrong page length: %u",
(ulong) page, page_size));
DBUG_DUMP("page", tmp, keyinfo->block_length);
info->last_keypage = HA_OFFSET_ERROR;
mi_print_error(info->s, HA_ERR_CRASHED);
set_my_errno(HA_ERR_CRASHED);
tmp = 0;
}
DBUG_RETURN(tmp);
} /* _mi_fetch_keypage */
