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/* Copyright (C) 2000-2003 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; 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 */
/*
Low level functions for storing data to be send to the MySQL client
The actual communction is handled by the net_xxx functions in net_serv.cc
*/
#ifdef __GNUC__
#pragma implementation // gcc: Class implementation
#endif
#include "mysql_priv.h"
#include <mysql.h>
bool Protocol_cursor::send_fields(List<Item> *list, uint flag)
{
List_iterator_fast<Item> it(*list);
Item *item;
MYSQL_FIELD *client_field;
DBUG_ENTER("send_fields");
if (prepare_for_send(list))
return FALSE;
fields= (MYSQL_FIELD *)alloc_root(alloc, sizeof(MYSQL_FIELD) * field_count);
if (!fields)
goto err;
client_field= fields;
while ((item= it++))
{
Send_field server_field;
item->make_field(&server_field);
client_field->db= strdup_root(alloc, server_field.db_name);
client_field->table= strdup_root(alloc, server_field.table_name);
client_field->name= strdup_root(alloc, server_field.col_name);
client_field->org_table= strdup_root(alloc, server_field.org_table_name);
client_field->org_name= strdup_root(alloc, server_field.org_col_name);
client_field->length= server_field.length;
client_field->type= server_field.type;
client_field->flags= server_field.flags;
client_field->decimals= server_field.decimals;
client_field->db_length= strlen(client_field->db);
client_field->table_length= strlen(client_field->table);
client_field->name_length= strlen(client_field->name);
client_field->org_name_length= strlen(client_field->org_name);
client_field->org_table_length= strlen(client_field->org_table);
client_field->charsetnr= server_field.charsetnr;
if (INTERNAL_NUM_FIELD(client_field))
client_field->flags|= NUM_FLAG;
if (flag & 2)
{
char buff[80];
String tmp(buff, sizeof(buff), default_charset_info), *res;
if (!(res=item->val_str(&tmp)))
client_field->def= (char*) "";
else
client_field->def= strmake_root(alloc, res->ptr(), res->length());
}
else
client_field->def=0;
client_field->max_length= 0;
++client_field;
}
DBUG_RETURN(FALSE);
err:
send_error(thd, ER_OUT_OF_RESOURCES); /* purecov: inspected */
DBUG_RETURN(TRUE); /* purecov: inspected */
}
/* Get the length of next field. Change parameter to point at fieldstart */
bool Protocol_cursor::write()
{
byte *cp= (byte *)packet->ptr();
byte *end_pos= (byte *)packet->ptr() + packet->length();
ulong len;
MYSQL_FIELD *cur_field= fields;
MYSQL_FIELD *fields_end= fields + field_count;
MYSQL_ROWS *new_record;
byte **data_tmp;
byte *to;
new_record= (MYSQL_ROWS *)alloc_root(alloc,
sizeof(MYSQL_ROWS) + (field_count + 1)*sizeof(char *) + packet->length());
if (!new_record)
goto err;
data_tmp= (byte **)(new_record + 1);
new_record->data= (char **)data_tmp;
to= (byte *)(fields + field_count + 1);
for (; cur_field < fields_end; ++cur_field, ++data_tmp)
{
if ((len=net_field_length((uchar **)&cp)))
{
*data_tmp= 0;
}
else
{
if ((long)len > (end_pos - cp))
{
// TODO error signal send_error(thd, CR_MALFORMED_PACKET);
return TRUE;
}
memcpy(to,(char*) cp,len);
to[len]=0;
to+=len+1;
cp+=len;
if (cur_field->max_length < len)
cur_field->max_length=len;
}
}
*prev_record= new_record;
prev_record= &new_record->next;
new_record->next= NULL;
row_count++;
return FALSE;
err:
// TODO error signal send_error(thd, ER_OUT_OF_RESOURCES);
return TRUE;
}
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