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/* Copyright (C) 2000-2003 MySQL AB
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   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,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   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 */
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#include <my_global.h>
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#if defined(__WIN__) || defined(_WIN32) || defined(_WIN64)
#include <winsock.h>
#include <odbcinst.h>
#endif
#include <my_sys.h>
#include <mysys_err.h>
#include <m_string.h>
#include <m_ctype.h>
#include "mysql.h"
#include "mysql_version.h"
#include "mysqld_error.h"
#include "errmsg.h"
#include <violite.h>
#include <sys/stat.h>
#include <signal.h>
#include <time.h>
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#include <assert.h> /* for DBUG_ASSERT() */
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#ifdef	 HAVE_PWD_H
#include <pwd.h>
#endif
#if !defined(MSDOS) && !defined(__WIN__)
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#ifdef HAVE_SELECT_H
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#include <select.h>
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#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
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#endif /* !defined(MSDOS) && !defined(__WIN__) */
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#ifdef HAVE_POLL
#include <sys/poll.h>
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#endif
#ifdef HAVE_SYS_UN_H
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#include <sys/un.h>
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#endif
#if defined(THREAD) && !defined(__WIN__)
#include <my_pthread.h>				/* because of signal()	*/
#endif
#ifndef INADDR_NONE
#define INADDR_NONE	-1
#endif

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#include <sql_common.h>
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#include "client_settings.h"
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ulong 		net_buffer_length=8192;
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ulong		max_allowed_packet= 1024L*1024L*1024L;
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ulong		net_read_timeout=  NET_READ_TIMEOUT;
ulong		net_write_timeout= NET_WRITE_TIMEOUT;
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#ifdef EMBEDDED_LIBRARY
#undef net_flush
my_bool	net_flush(NET *net);
#endif

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#if defined(MSDOS) || defined(__WIN__)
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/* socket_errno is defined in my_global.h for all platforms */
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#define perror(A)
#else
#include <errno.h>
#define SOCKET_ERROR -1
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#endif /* __WIN__ */
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/*
  If allowed through some configuration, then this needs to
  be changed
*/
#define MAX_LONG_DATA_LENGTH 8192
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#define unsigned_field(A) ((A)->flags & UNSIGNED_FLAG)

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static void append_wild(char *to,char *end,const char *wild);
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sig_handler pipe_sig_handler(int sig);
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static ulong mysql_sub_escape_string(CHARSET_INFO *charset_info, char *to,
				     const char *from, ulong length);
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my_bool stmt_close(MYSQL_STMT *stmt, my_bool skip_list);
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static my_bool mysql_client_init= 0;
static my_bool org_my_init_done= 0;

void mysql_once_init(void)
{
  if (!mysql_client_init)
  {
    mysql_client_init=1;
    org_my_init_done=my_init_done;
    my_init();					/* Will init threads */
    init_client_errs();
    if (!mysql_port)
    {
      mysql_port = MYSQL_PORT;
#ifndef MSDOS
      {
	struct servent *serv_ptr;
	char	*env;
	if ((serv_ptr = getservbyname("mysql", "tcp")))
	  mysql_port = (uint) ntohs((ushort) serv_ptr->s_port);
	if ((env = getenv("MYSQL_TCP_PORT")))
	  mysql_port =(uint) atoi(env);
      }
#endif
    }
    if (!mysql_unix_port)
    {
      char *env;
#ifdef __WIN__
      mysql_unix_port = (char*) MYSQL_NAMEDPIPE;
#else
      mysql_unix_port = (char*) MYSQL_UNIX_ADDR;
#endif
      if ((env = getenv("MYSQL_UNIX_PORT")))
	mysql_unix_port = env;
    }
    mysql_debug(NullS);
#if defined(SIGPIPE) && !defined(THREAD) && !defined(__WIN__)
    (void) signal(SIGPIPE,SIG_IGN);
#endif
  }
#ifdef THREAD
  else
    my_thread_init();         /* Init if new thread */
#endif
}

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#ifndef EMBEDDED_LIBRARY
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int STDCALL mysql_server_init(int argc __attribute__((unused)),
			      char **argv __attribute__((unused)),
			      char **groups __attribute__((unused)))
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{
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  mysql_once_init();
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  return 0;
}
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void STDCALL mysql_server_end()
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{
  /* If library called my_init(), free memory allocated by it */
  if (!org_my_init_done)
    my_end(0);
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  else
    mysql_thread_end();
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}
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#endif /*EMBEDDED_LIBRARY*/
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my_bool STDCALL mysql_thread_init()
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{
#ifdef THREAD
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  return my_thread_init();
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#else
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  return 0;
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#endif
}

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void STDCALL mysql_thread_end()
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{
#ifdef THREAD
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  my_thread_end();
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#endif
}

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/*
  Let the user specify that we don't want SIGPIPE;  This doesn't however work
  with threaded applications as we can have multiple read in progress.
*/
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static MYSQL* spawn_init(MYSQL* parent, const char* host,
			 unsigned int port,
			 const char* user,
			 const char* passwd);

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/*
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  Expand wildcard to a sql string
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*/

static void
append_wild(char *to, char *end, const char *wild)
{
  end-=5;					/* Some extra */
  if (wild && wild[0])
  {
    to=strmov(to," like '");
    while (*wild && to < end)
    {
      if (*wild == '\\' || *wild == '\'')
	*to++='\\';
      *to++= *wild++;
    }
    if (*wild)					/* Too small buffer */
      *to++='%';				/* Nicer this way */
    to[0]='\'';
    to[1]=0;
  }
}


/**************************************************************************
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  Init debugging if MYSQL_DEBUG environment variable is found
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**************************************************************************/

void STDCALL
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mysql_debug(const char *debug __attribute__((unused)))
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{
#ifndef DBUG_OFF
  char	*env;
  if (_db_on_)
    return;					/* Already using debugging */
  if (debug)
  {
    DEBUGGER_ON;
    DBUG_PUSH(debug);
  }
  else if ((env = getenv("MYSQL_DEBUG")))
  {
    DEBUGGER_ON;
    DBUG_PUSH(env);
#if !defined(_WINVER) && !defined(WINVER)
    puts("\n-------------------------------------------------------");
    puts("MYSQL_DEBUG found. libmysql started with the following:");
    puts(env);
    puts("-------------------------------------------------------\n");
#else
    {
      char buff[80];
      strmov(strmov(buff,"libmysql: "),env);
      MessageBox((HWND) 0,"Debugging variable MYSQL_DEBUG used",buff,MB_OK);
    }
#endif
  }
#endif
}


/**************************************************************************
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  Close the server connection if we get a SIGPIPE
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   ARGSUSED
**************************************************************************/

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sig_handler
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pipe_sig_handler(int sig __attribute__((unused)))
{
  DBUG_PRINT("info",("Hit by signal %d",sig));
#ifdef DONT_REMEMBER_SIGNAL
  (void) signal(SIGPIPE,pipe_sig_handler);
#endif
}

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/* perform query on master */
my_bool STDCALL mysql_master_query(MYSQL *mysql, const char *q,
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				   unsigned long length)
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{
  DBUG_ENTER("mysql_master_query");
  if (mysql_master_send_query(mysql, q, length))
    DBUG_RETURN(1);
  DBUG_RETURN(mysql_read_query_result(mysql));
}
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my_bool STDCALL mysql_master_send_query(MYSQL *mysql, const char *q,
					unsigned long length)
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{
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  MYSQL *master = mysql->master;
  DBUG_ENTER("mysql_master_send_query");
  if (!master->net.vio && !mysql_real_connect(master,0,0,0,0,0,0,0))
    DBUG_RETURN(1);
  mysql->last_used_con = master;
  DBUG_RETURN(simple_command(master, COM_QUERY, q, length, 1));
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}


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/* perform query on slave */
my_bool STDCALL mysql_slave_query(MYSQL *mysql, const char *q,
				  unsigned long length)
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{
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  DBUG_ENTER("mysql_slave_query");
  if (mysql_slave_send_query(mysql, q, length))
    DBUG_RETURN(1);
  DBUG_RETURN(mysql_read_query_result(mysql));
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}


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my_bool STDCALL mysql_slave_send_query(MYSQL *mysql, const char *q,
				   unsigned long length)
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{
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  MYSQL* last_used_slave, *slave_to_use = 0;
  DBUG_ENTER("mysql_slave_send_query");
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  if ((last_used_slave = mysql->last_used_slave))
    slave_to_use = last_used_slave->next_slave;
  else
    slave_to_use = mysql->next_slave;
  /*
    Next_slave is always safe to use - we have a circular list of slaves
    if there are no slaves, mysql->next_slave == mysql
  */
  mysql->last_used_con = mysql->last_used_slave = slave_to_use;
  if (!slave_to_use->net.vio && !mysql_real_connect(slave_to_use, 0,0,0,
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						    0,0,0,0))
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    DBUG_RETURN(1);
  DBUG_RETURN(simple_command(slave_to_use, COM_QUERY, q, length, 1));
}
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/* enable/disable parsing of all queries to decide
   if they go on master or slave */
void STDCALL mysql_enable_rpl_parse(MYSQL* mysql)
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{
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  mysql->options.rpl_parse = 1;
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}

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void STDCALL mysql_disable_rpl_parse(MYSQL* mysql)
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{
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  mysql->options.rpl_parse = 0;
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}

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/* get the value of the parse flag */
int STDCALL mysql_rpl_parse_enabled(MYSQL* mysql)
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{
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  return mysql->options.rpl_parse;
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}

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/*  enable/disable reads from master */
void STDCALL mysql_enable_reads_from_master(MYSQL* mysql)
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{
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  mysql->options.no_master_reads = 0;
}
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void STDCALL mysql_disable_reads_from_master(MYSQL* mysql)
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{
  mysql->options.no_master_reads = 1;
}

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/* get the value of the master read flag */
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my_bool STDCALL mysql_reads_from_master_enabled(MYSQL* mysql)
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{
  return !(mysql->options.no_master_reads);
}

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/*
  We may get an error while doing replication internals.
  In this case, we add a special explanation to the original
  error
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*/
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static void expand_error(MYSQL* mysql, int error)
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{
  char tmp[MYSQL_ERRMSG_SIZE];
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  char *p;
  uint err_length;
  strmake(tmp, mysql->net.last_error, MYSQL_ERRMSG_SIZE-1);
  p = strmake(mysql->net.last_error, ER(error), MYSQL_ERRMSG_SIZE-1);
  err_length= (uint) (p - mysql->net.last_error);
  strmake(p, tmp, MYSQL_ERRMSG_SIZE-1 - err_length);
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  mysql->net.last_errno = error;
}

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/*
  This function assumes we have just called SHOW SLAVE STATUS and have
  read the given result and row
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*/
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static my_bool get_master(MYSQL* mysql, MYSQL_RES* res, MYSQL_ROW row)
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{
  MYSQL* master;
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  DBUG_ENTER("get_master");
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  if (mysql_num_fields(res) < 3)
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    DBUG_RETURN(1); /* safety */
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  /* use the same username and password as the original connection */
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  if (!(master = spawn_init(mysql, row[0], atoi(row[2]), 0, 0)))
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    DBUG_RETURN(1);
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  mysql->master = master;
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  DBUG_RETURN(0);
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}

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/*
  Assuming we already know that mysql points to a master connection,
  retrieve all the slaves
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*/
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static my_bool get_slaves_from_master(MYSQL* mysql)
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{
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  MYSQL_RES* res = 0;
  MYSQL_ROW row;
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  my_bool error = 1;
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  int has_auth_info;
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  int port_ind;
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  DBUG_ENTER("get_slaves_from_master");
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  if (!mysql->net.vio && !mysql_real_connect(mysql,0,0,0,0,0,0,0))
  {
    expand_error(mysql, CR_PROBE_MASTER_CONNECT);
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    DBUG_RETURN(1);
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  }

  if (mysql_query(mysql, "SHOW SLAVE HOSTS") ||
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      !(res = mysql_store_result(mysql)))
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  {
    expand_error(mysql, CR_PROBE_SLAVE_HOSTS);
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    DBUG_RETURN(1);
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  }

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  switch (mysql_num_fields(res)) {
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  case 5:
    has_auth_info = 0;
    port_ind=2;
    break;
  case 7:
    has_auth_info = 1;
    port_ind=4;
    break;
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  default:
    goto err;
  }

  while ((row = mysql_fetch_row(res)))
  {
    MYSQL* slave;
    const char* tmp_user, *tmp_pass;

    if (has_auth_info)
    {
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      tmp_user = row[2];
      tmp_pass = row[3];
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    }
    else
    {
      tmp_user = mysql->user;
      tmp_pass = mysql->passwd;
    }

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    if (!(slave = spawn_init(mysql, row[1], atoi(row[port_ind]),
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			     tmp_user, tmp_pass)))
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      goto err;
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    /* Now add slave into the circular linked list */
    slave->next_slave = mysql->next_slave;
    mysql->next_slave = slave;
  }
  error = 0;
err:
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  if (res)
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    mysql_free_result(res);
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  DBUG_RETURN(error);
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}

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my_bool STDCALL mysql_rpl_probe(MYSQL* mysql)
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{
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  MYSQL_RES *res= 0;
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  MYSQL_ROW row;
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  my_bool error= 1;
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  DBUG_ENTER("mysql_rpl_probe");

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  /*
    First determine the replication role of the server we connected to
    the most reliable way to do this is to run SHOW SLAVE STATUS and see
    if we have a non-empty master host. This is still not fool-proof -
    it is not a sin to have a master that has a dormant slave thread with
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    a non-empty master host. However, it is more reliable to check
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    for empty master than whether the slave thread is actually running
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  */
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  if (mysql_query(mysql, "SHOW SLAVE STATUS") ||
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      !(res = mysql_store_result(mysql)))
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  {
    expand_error(mysql, CR_PROBE_SLAVE_STATUS);
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    DBUG_RETURN(1);
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  }
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  row= mysql_fetch_row(res);
  /*
    Check master host for emptiness/NULL
    For MySQL 4.0 it's enough to check for row[0]
  */
  if (row && row[0] && *(row[0]))
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  {
    /* this is a slave, ask it for the master */
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    if (get_master(mysql, res, row) || get_slaves_from_master(mysql))
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      goto err;
  }
  else
  {
    mysql->master = mysql;
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    if (get_slaves_from_master(mysql))
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      goto err;
  }

  error = 0;
err:
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  if (res)
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    mysql_free_result(res);
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  DBUG_RETURN(error);
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}


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/*
  Make a not so fool-proof decision on where the query should go, to
  the master or the slave. Ideally the user should always make this
  decision himself with mysql_master_query() or mysql_slave_query().
  However, to be able to more easily port the old code, we support the
  option of an educated guess - this should work for most applications,
  however, it may make the wrong decision in some particular cases. If
  that happens, the user would have to change the code to call
  mysql_master_query() or mysql_slave_query() explicitly in the place
  where we have made the wrong decision
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*/
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enum mysql_rpl_type
STDCALL mysql_rpl_query_type(const char* q, int len)
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{
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  const char *q_end= q + len;
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  for (; q < q_end; ++q)
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  {
    char c;
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    if (my_isalpha(&my_charset_latin1, (c= *q)))
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    {
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      switch (my_tolower(&my_charset_latin1,c)) {
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      case 'i':  /* insert */
      case 'u':  /* update or unlock tables */
      case 'l':  /* lock tables or load data infile */
      case 'd':  /* drop or delete */
      case 'a':  /* alter */
	return MYSQL_RPL_MASTER;
      case 'c':  /* create or check */
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	return my_tolower(&my_charset_latin1,q[1]) == 'h' ? MYSQL_RPL_ADMIN :
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	  MYSQL_RPL_MASTER;
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      case 's': /* select or show */
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	return my_tolower(&my_charset_latin1,q[1]) == 'h' ? MYSQL_RPL_ADMIN :
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	  MYSQL_RPL_SLAVE;
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      case 'f': /* flush */
      case 'r': /* repair */
      case 'g': /* grant */
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	return MYSQL_RPL_ADMIN;
      default:
	return MYSQL_RPL_SLAVE;
      }
    }
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  }
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  return MYSQL_RPL_MASTER;		/* By default, send to master */
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}


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/**************************************************************************
  Connect to sql server
  If host == 0 then use localhost
**************************************************************************/
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#ifdef USE_OLD_FUNCTIONS
MYSQL * STDCALL
mysql_connect(MYSQL *mysql,const char *host,
	      const char *user, const char *passwd)
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{
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  MYSQL *res;
  mysql=mysql_init(mysql);			/* Make it thread safe */
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  {
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    DBUG_ENTER("mysql_connect");
    if (!(res=mysql_real_connect(mysql,host,user,passwd,NullS,0,NullS,0)))
    {
      if (mysql->free_me)
	my_free((gptr) mysql,MYF(0));
    }
    DBUG_RETURN(res);
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  }
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}
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#endif
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/**************************************************************************
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  Change user and database
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**************************************************************************/

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my_bool	STDCALL mysql_change_user(MYSQL *mysql, const char *user,
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				  const char *passwd, const char *db)
{
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  char buff[512],*end=buff;
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  DBUG_ENTER("mysql_change_user");

  if (!user)
    user="";
  if (!passwd)
    passwd="";
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  /* Store user into the buffer */
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  end=strmov(end,user)+1;
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  /* write scrambled password according to server capabilities */
  if (passwd[0])
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  {
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    if (mysql->server_capabilities & CLIENT_SECURE_CONNECTION)
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    {
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      *end++= SCRAMBLE_LENGTH;
      scramble(end, mysql->scramble, passwd);
      end+= SCRAMBLE_LENGTH;
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    }
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    else
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    {
      scramble_323(end, mysql->scramble, passwd);
      end+= SCRAMBLE_LENGTH_323 + 1;
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    }
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  }
  else
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    *end++= '\0';                               // empty password
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  /* Add database if needed */
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  end= strmov(end, db ? db : "") + 1;
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  /* Write authentication package */
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  simple_command(mysql,COM_CHANGE_USER, buff,(ulong) (end-buff),1);
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  NET *net= &mysql->net;
  ulong pkt_length= net_safe_read(mysql);

  if (pkt_length == packet_error)
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    goto error;
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  if (pkt_length == 1 && net->read_pos[0] == 254 &&
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      mysql->server_capabilities & CLIENT_SECURE_CONNECTION)
  {
    /*
      By sending this very specific reply server asks us to send scrambled
      password in old format. The reply contains scramble_323.
    */
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    scramble_323(buff, mysql->scramble, passwd);
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    if (my_net_write(net, buff, SCRAMBLE_LENGTH_323 + 1) || net_flush(net))
    {
      net->last_errno= CR_SERVER_LOST;
      strmov(net->sqlstate, unknown_sqlstate);
      strmov(net->last_error,ER(net->last_errno));
      goto error;
    }
    /* Read what server thinks about out new auth message report */
    if (net_safe_read(mysql) == packet_error)
      goto error;
  }

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  /* Free old connect information */
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  my_free(mysql->user,MYF(MY_ALLOW_ZERO_PTR));
  my_free(mysql->passwd,MYF(MY_ALLOW_ZERO_PTR));
  my_free(mysql->db,MYF(MY_ALLOW_ZERO_PTR));

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  /* alloc new connect information */
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  mysql->user=  my_strdup(user,MYF(MY_WME));
  mysql->passwd=my_strdup(passwd,MYF(MY_WME));
  mysql->db=    db ? my_strdup(db,MYF(MY_WME)) : 0;
  DBUG_RETURN(0);
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error:
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  DBUG_RETURN(1);
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}

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#if defined(HAVE_GETPWUID) && defined(NO_GETPWUID_DECL)
struct passwd *getpwuid(uid_t);
char* getlogin(void);
#endif

#if defined(__NETWARE__)
/* default to "root" on NetWare */
void read_user_name(char *name)
{
  char *str=getenv("USER");
  strmake(name, str ? str : "UNKNOWN_USER", USERNAME_LENGTH);
}

#elif !defined(MSDOS) && ! defined(VMS) && !defined(__WIN__) && !defined(OS2)

void read_user_name(char *name)
{
  DBUG_ENTER("read_user_name");
  if (geteuid() == 0)
    (void) strmov(name,"root");		/* allow use of surun */
  else
  {
#ifdef HAVE_GETPWUID
    struct passwd *skr;
    const char *str;
    if ((str=getlogin()) == NULL)
    {
      if ((skr=getpwuid(geteuid())) != NULL)
	str=skr->pw_name;
      else if (!(str=getenv("USER")) && !(str=getenv("LOGNAME")) &&
	       !(str=getenv("LOGIN")))
	str="UNKNOWN_USER";
    }
    (void) strmake(name,str,USERNAME_LENGTH);
#elif HAVE_CUSERID
    (void) cuserid(name);
#else
    strmov(name,"UNKNOWN_USER");
#endif
  }
  DBUG_VOID_RETURN;
}

#else /* If MSDOS || VMS */

void read_user_name(char *name)
{
  char *str=getenv("USER");		/* ODBC will send user variable */
  strmake(name,str ? str : "ODBC", USERNAME_LENGTH);
}

#endif

my_bool send_file_to_server(MYSQL *mysql, const char *filename)
{
  int fd, readcount;
  my_bool result= 1;
  uint packet_length=MY_ALIGN(mysql->net.max_packet-16,IO_SIZE);
  char *buf, tmp_name[FN_REFLEN];
  NET *net= &mysql->net;
  DBUG_ENTER("send_file_to_server");

  if (!(buf=my_malloc(packet_length,MYF(0))))
  {
    strmov(net->sqlstate, unknown_sqlstate);
    strmov(net->last_error, ER(net->last_errno=CR_OUT_OF_MEMORY));
    DBUG_RETURN(1);
  }

  fn_format(tmp_name,filename,"","",4);		/* Convert to client format */
  if ((fd = my_open(tmp_name,O_RDONLY, MYF(0))) < 0)
  {
    my_net_write(net,"",0);		/* Server needs one packet */
    net_flush(net);
    strmov(net->sqlstate, unknown_sqlstate);
    net->last_errno=EE_FILENOTFOUND;
    my_snprintf(net->last_error,sizeof(net->last_error)-1,
		EE(net->last_errno),tmp_name, errno);
    goto err;
  }

  while ((readcount = (int) my_read(fd,(byte*) buf,packet_length,MYF(0))) > 0)
  {
    if (my_net_write(net,buf,readcount))
    {
      DBUG_PRINT("error",("Lost connection to MySQL server during LOAD DATA of local file"));
      strmov(net->sqlstate, unknown_sqlstate);
      net->last_errno=CR_SERVER_LOST;
      strmov(net->last_error,ER(net->last_errno));
      goto err;
    }
  }
  /* Send empty packet to mark end of file */
  if (my_net_write(net,"",0) || net_flush(net))
  {
    strmov(net->sqlstate, unknown_sqlstate);
    net->last_errno=CR_SERVER_LOST;
    sprintf(net->last_error,ER(net->last_errno),errno);
    goto err;
  }
  if (readcount < 0)
  {
    strmov(net->sqlstate, unknown_sqlstate);
    net->last_errno=EE_READ; /* the errmsg for not entire file read */
    my_snprintf(net->last_error,sizeof(net->last_error)-1,
		tmp_name,errno);
    goto err;
  }
  result=0;					/* Ok */

err:
  if (fd >= 0)
    (void) my_close(fd,MYF(0));
  my_free(buf,MYF(0));
  DBUG_RETURN(result);
}


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/**************************************************************************
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  Do a query. If query returned rows, free old rows.
  Read data by mysql_store_result or by repeat call of mysql_fetch_row
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**************************************************************************/

int STDCALL
mysql_query(MYSQL *mysql, const char *query)
{
  return mysql_real_query(mysql,query, (uint) strlen(query));
}

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static MYSQL* spawn_init(MYSQL* parent, const char* host,
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			 unsigned int port, const char* user,
			 const char* passwd)
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{
  MYSQL* child;
  if (!(child = mysql_init(0)))
    return 0;
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  child->options.user = my_strdup((user) ? user :
				  (parent->user ? parent->user :
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				   parent->options.user), MYF(0));
  child->options.password = my_strdup((passwd) ? passwd :
				      (parent->passwd ?
				       parent->passwd :
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				       parent->options.password), MYF(0));
  child->options.port = port;
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  child->options.host = my_strdup((host) ? host :
				  (parent->host ?
				   parent->host :
				   parent->options.host), MYF(0));
  if (parent->db)
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    child->options.db = my_strdup(parent->db, MYF(0));
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  else if (parent->options.db)
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    child->options.db = my_strdup(parent->options.db, MYF(0));

  child->options.rpl_parse = child->options.rpl_probe = child->rpl_pivot = 0;
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  return child;
}


int
STDCALL mysql_set_master(MYSQL* mysql, const char* host,
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			 unsigned int port, const char* user,
			 const char* passwd)
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{
  if (mysql->master != mysql && !mysql->master->rpl_pivot)
    mysql_close(mysql->master);
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  if (!(mysql->master = spawn_init(mysql, host, port, user, passwd)))
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    return 1;
  mysql->master->rpl_pivot = 0;
  mysql->master->options.rpl_parse = 0;
  mysql->master->options.rpl_probe = 0;
  return 0;
}

int
STDCALL mysql_add_slave(MYSQL* mysql, const char* host,
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			unsigned int port,
			const char* user,
			const char* passwd)
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{
  MYSQL* slave;
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  if (!(slave = spawn_init(mysql, host, port, user, passwd)))
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    return 1;
  slave->next_slave = mysql->next_slave;
  mysql->next_slave = slave;
  return 0;
}

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/**************************************************************************
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  Return next field of the query results
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**************************************************************************/

MYSQL_FIELD * STDCALL
mysql_fetch_field(MYSQL_RES *result)
{
  if (result->current_field >= result->field_count)
    return(NULL);
  return &result->fields[result->current_field++];
}

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/**************************************************************************
  Get column lengths of the current row
  If one uses mysql_use_result, res->lengths contains the length information,
  else the lengths are calculated from the offset between pointers.
**************************************************************************/

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ulong * STDCALL
mysql_fetch_lengths(MYSQL_RES *res)
{
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  MYSQL_ROW column;
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  if (!(column=res->current_row))
    return 0;					/* Something is wrong */
  if (res->data)
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    (*res->methods->fetch_lengths)(res->lengths, column, res->field_count);
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  return res->lengths;
}

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/**************************************************************************
  Move to a specific row and column
**************************************************************************/

void STDCALL
mysql_data_seek(MYSQL_RES *result, my_ulonglong row)
{
  MYSQL_ROWS	*tmp=0;
  DBUG_PRINT("info",("mysql_data_seek(%ld)",(long) row));
  if (result->data)
    for (tmp=result->data->data; row-- && tmp ; tmp = tmp->next) ;
  result->current_row=0;
  result->data_cursor = tmp;
}


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/*************************************************************************
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  put the row or field cursor one a position one got from mysql_row_tell()
  This doesn't restore any data. The next mysql_fetch_row or
  mysql_fetch_field will return the next row or field after the last used
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*************************************************************************/

MYSQL_ROW_OFFSET STDCALL
mysql_row_seek(MYSQL_RES *result, MYSQL_ROW_OFFSET row)
{
  MYSQL_ROW_OFFSET return_value=result->data_cursor;
  result->current_row= 0;
  result->data_cursor= row;
  return return_value;
}


MYSQL_FIELD_OFFSET STDCALL
mysql_field_seek(MYSQL_RES *result, MYSQL_FIELD_OFFSET field_offset)
{
  MYSQL_FIELD_OFFSET return_value=result->current_field;
  result->current_field=field_offset;
  return return_value;
}

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/*****************************************************************************
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  List all databases
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*****************************************************************************/

MYSQL_RES * STDCALL
mysql_list_dbs(MYSQL *mysql, const char *wild)
{
  char buff[255];
  DBUG_ENTER("mysql_list_dbs");

  append_wild(strmov(buff,"show databases"),buff+sizeof(buff),wild);
  if (mysql_query(mysql,buff))
    DBUG_RETURN(0);
  DBUG_RETURN (mysql_store_result(mysql));
}


/*****************************************************************************
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  List all tables in a database
  If wild is given then only the tables matching wild is returned
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*****************************************************************************/

MYSQL_RES * STDCALL
mysql_list_tables(MYSQL *mysql, const char *wild)
{
  char buff[255];
  DBUG_ENTER("mysql_list_tables");

  append_wild(strmov(buff,"show tables"),buff+sizeof(buff),wild);
  if (mysql_query(mysql,buff))
    DBUG_RETURN(0);
  DBUG_RETURN (mysql_store_result(mysql));
}

/**************************************************************************
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  List all fields in a table
  If wild is given then only the fields matching wild is returned
  Instead of this use query:
  show fields in 'table' like "wild"
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**************************************************************************/

MYSQL_RES * STDCALL
mysql_list_fields(MYSQL *mysql, const char *table, const char *wild)
{
  MYSQL_RES *result;
  MYSQL_DATA *query;
  char	     buff[257],*end;
  DBUG_ENTER("mysql_list_fields");
  DBUG_PRINT("enter",("table: '%s'  wild: '%s'",table,wild ? wild : ""));

  LINT_INIT(query);

  end=strmake(strmake(buff, table,128)+1,wild ? wild : "",128);
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  if (simple_command(mysql,COM_FIELD_LIST,buff,(ulong) (end-buff),1) ||
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      !(query = read_rows(mysql,(MYSQL_FIELD*) 0, 
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			  protocol_41(mysql) ? 8 : 6)))
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    DBUG_RETURN(NULL);

  free_old_query(mysql);
  if (!(result = (MYSQL_RES *) my_malloc(sizeof(MYSQL_RES),
					 MYF(MY_WME | MY_ZEROFILL))))
  {
    free_rows(query);
    DBUG_RETURN(NULL);
  }
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  result->methods= mysql->methods;
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  result->field_alloc=mysql->field_alloc;
  mysql->fields=0;
  result->field_count = (uint) query->rows;
  result->fields= unpack_fields(query,&result->field_alloc,
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				result->field_count, 1,
				mysql->server_capabilities);
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  result->eof=1;
  DBUG_RETURN(result);
}

/* List all running processes (threads) in server */

MYSQL_RES * STDCALL
mysql_list_processes(MYSQL *mysql)
{
  MYSQL_DATA *fields;
  uint field_count;
  uchar *pos;
  DBUG_ENTER("mysql_list_processes");

  LINT_INIT(fields);
  if (simple_command(mysql,COM_PROCESS_INFO,0,0,0))
    DBUG_RETURN(0);
  free_old_query(mysql);
  pos=(uchar*) mysql->net.read_pos;
  field_count=(uint) net_field_length(&pos);
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  if (!(fields = read_rows(mysql,(MYSQL_FIELD*) 0,
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			   protocol_41(mysql) ? 7 : 5)))
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    DBUG_RETURN(NULL);
  if (!(mysql->fields=unpack_fields(fields,&mysql->field_alloc,field_count,0,
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				    mysql->server_capabilities)))
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    DBUG_RETURN(0);
  mysql->status=MYSQL_STATUS_GET_RESULT;
  mysql->field_count=field_count;
  DBUG_RETURN(mysql_store_result(mysql));
}

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#ifdef USE_OLD_FUNCTIONS
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int  STDCALL
mysql_create_db(MYSQL *mysql, const char *db)
{
  DBUG_ENTER("mysql_createdb");
  DBUG_PRINT("enter",("db: %s",db));
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  DBUG_RETURN(simple_command(mysql,COM_CREATE_DB,db, (ulong) strlen(db),0));
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}


int  STDCALL
mysql_drop_db(MYSQL *mysql, const char *db)
{
  DBUG_ENTER("mysql_drop_db");
  DBUG_PRINT("enter",("db: %s",db));
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  DBUG_RETURN(simple_command(mysql,COM_DROP_DB,db,(ulong) strlen(db),0));
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}
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#endif
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int STDCALL
mysql_shutdown(MYSQL *mysql)
{
  DBUG_ENTER("mysql_shutdown");
  DBUG_RETURN(simple_command(mysql,COM_SHUTDOWN,0,0,0));
}


int STDCALL
mysql_refresh(MYSQL *mysql,uint options)
{
  uchar bits[1];
  DBUG_ENTER("mysql_refresh");
  bits[0]= (uchar) options;
  DBUG_RETURN(simple_command(mysql,COM_REFRESH,(char*) bits,1,0));
}

int STDCALL
mysql_kill(MYSQL *mysql,ulong pid)
{
  char buff[12];
  DBUG_ENTER("mysql_kill");
  int4store(buff,pid);
  DBUG_RETURN(simple_command(mysql,COM_PROCESS_KILL,buff,4,0));
}


int STDCALL
mysql_dump_debug_info(MYSQL *mysql)
{
  DBUG_ENTER("mysql_dump_debug_info");
  DBUG_RETURN(simple_command(mysql,COM_DEBUG,0,0,0));
}

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const char * STDCALL
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mysql_stat(MYSQL *mysql)
{
  DBUG_ENTER("mysql_stat");
  if (simple_command(mysql,COM_STATISTICS,0,0,0))
    return mysql->net.last_error;
  mysql->net.read_pos[mysql->packet_length]=0;	/* End of stat string */
  if (!mysql->net.read_pos[0])
  {
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    strmov(mysql->net.sqlstate, unknown_sqlstate);
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    mysql->net.last_errno=CR_WRONG_HOST_INFO;
    strmov(mysql->net.last_error, ER(mysql->net.last_errno));
    return mysql->net.last_error;
  }
  DBUG_RETURN((char*) mysql->net.read_pos);
}


int STDCALL
mysql_ping(MYSQL *mysql)
{
  DBUG_ENTER("mysql_ping");
  DBUG_RETURN(simple_command(mysql,COM_PING,0,0,0));
}


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const char * STDCALL
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mysql_get_server_info(MYSQL *mysql)
{
  return((char*) mysql->server_version);
}


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/*
  Get version number for server in a form easy to test on

  SYNOPSIS
    mysql_get_server_version()
    mysql		Connection

  EXAMPLE
    4.1.0-alfa ->  40100
  
  NOTES
    We will ensure that a newer server always has a bigger number.

  RETURN
   Signed number > 323000
*/

ulong STDCALL
mysql_get_server_version(MYSQL *mysql)
{
  uint major, minor, version;
  char *pos= mysql->server_version, *end_pos;
  major=   (uint) strtoul(pos, &end_pos, 10);	pos=end_pos+1;
  minor=   (uint) strtoul(pos, &end_pos, 10);	pos=end_pos+1;
  version= (uint) strtoul(pos, &end_pos, 10);
  return (ulong) major*10000L+(ulong) (minor*100+version);
}


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const char * STDCALL
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mysql_get_host_info(MYSQL *mysql)
{
  return(mysql->host_info);
}


uint STDCALL
mysql_get_proto_info(MYSQL *mysql)
{
  return (mysql->protocol_version);
}

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const char * STDCALL
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mysql_get_client_info(void)
{
  return (char*) MYSQL_SERVER_VERSION;
}

my_bool STDCALL mysql_eof(MYSQL_RES *res)
{
  return res->eof;
}

MYSQL_FIELD * STDCALL mysql_fetch_field_direct(MYSQL_RES *res,uint fieldnr)
{
  return &(res)->fields[fieldnr];
}

MYSQL_FIELD * STDCALL mysql_fetch_fields(MYSQL_RES *res)
{
  return (res)->fields;
}

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MYSQL_ROW_OFFSET STDCALL mysql_row_tell(MYSQL_RES *res)
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{
  return res->data_cursor;
}

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MYSQL_FIELD_OFFSET STDCALL mysql_field_tell(MYSQL_RES *res)
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{
  return (res)->current_field;
}

/* MYSQL */

unsigned int STDCALL mysql_field_count(MYSQL *mysql)
{
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  return mysql->last_used_con->field_count;
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}

my_ulonglong STDCALL mysql_affected_rows(MYSQL *mysql)
{
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  return mysql->last_used_con->affected_rows;
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}

my_ulonglong STDCALL mysql_insert_id(MYSQL *mysql)
{
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  return mysql->last_used_con->insert_id;
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}

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const char *STDCALL mysql_sqlstate(MYSQL *mysql)
{
  return mysql->net.sqlstate;
}

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uint STDCALL mysql_warning_count(MYSQL *mysql)
{
  return mysql->warning_count;
}

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const char *STDCALL mysql_info(MYSQL *mysql)
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{
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  return mysql->info;
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}

ulong STDCALL mysql_thread_id(MYSQL *mysql)
{
  return (mysql)->thread_id;
}

const char * STDCALL mysql_character_set_name(MYSQL *mysql)
{
  return mysql->charset->name;
}


uint STDCALL mysql_thread_safe(void)
{
#ifdef THREAD
  return 1;
#else
  return 0;
#endif
}

/****************************************************************************
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  Some support functions
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****************************************************************************/

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/*
  Functions called my my_net_init() to set some application specific variables
*/

void my_net_local_init(NET *net)
{
  net->max_packet=   (uint) net_buffer_length;
  net->read_timeout= (uint) net_read_timeout;
  net->write_timeout=(uint) net_write_timeout;
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  net->retry_count=  1;
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  net->max_packet_size= max(net_buffer_length, max_allowed_packet);
}

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/*
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  Add escape characters to a string (blob?) to make it suitable for a insert
  to should at least have place for length*2+1 chars
  Returns the length of the to string
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*/

ulong STDCALL
mysql_escape_string(char *to,const char *from,ulong length)
{
  return mysql_sub_escape_string(default_charset_info,to,from,length);
}

ulong STDCALL
mysql_real_escape_string(MYSQL *mysql, char *to,const char *from,
			 ulong length)
{
  return mysql_sub_escape_string(mysql->charset,to,from,length);
}


static ulong
mysql_sub_escape_string(CHARSET_INFO *charset_info, char *to,
			const char *from, ulong length)
{
  const char *to_start=to;
  const char *end;
#ifdef USE_MB
  my_bool use_mb_flag=use_mb(charset_info);
#endif
  for (end=from+length; from != end ; from++)
  {
#ifdef USE_MB
    int l;
    if (use_mb_flag && (l = my_ismbchar(charset_info, from, end)))
    {
      while (l--)
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	*to++ = *from++;
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      from--;
      continue;
    }
#endif
    switch (*from) {
    case 0:				/* Must be escaped for 'mysql' */
      *to++= '\\';
      *to++= '0';
      break;
    case '\n':				/* Must be escaped for logs */
      *to++= '\\';
      *to++= 'n';
      break;
    case '\r':
      *to++= '\\';
      *to++= 'r';
      break;
    case '\\':
      *to++= '\\';
      *to++= '\\';
      break;
    case '\'':
      *to++= '\\';
      *to++= '\'';
      break;
    case '"':				/* Better safe than sorry */
      *to++= '\\';
      *to++= '"';
      break;
    case '\032':			/* This gives problems on Win32 */
      *to++= '\\';
      *to++= 'Z';
      break;
    default:
      *to++= *from;
    }
  }
  *to=0;
  return (ulong) (to-to_start);
}


char * STDCALL
mysql_odbc_escape_string(MYSQL *mysql,
			 char *to, ulong to_length,
			 const char *from, ulong from_length,
			 void *param,
			 char * (*extend_buffer)
			 (void *, char *, ulong *))
{
  char *to_end=to+to_length-5;
  const char *end;
#ifdef USE_MB
  my_bool use_mb_flag=use_mb(mysql->charset);
#endif

  for (end=from+from_length; from != end ; from++)
  {
    if (to >= to_end)
    {
      to_length = (ulong) (end-from)+512;	/* We want this much more */
      if (!(to=(*extend_buffer)(param, to, &to_length)))
	return to;
      to_end=to+to_length-5;
    }
#ifdef USE_MB
    {
      int l;
      if (use_mb_flag && (l = my_ismbchar(mysql->charset, from, end)))
      {
	while (l--)
	  *to++ = *from++;
	from--;
	continue;
      }
    }
#endif
    switch (*from) {
    case 0:				/* Must be escaped for 'mysql' */
      *to++= '\\';
      *to++= '0';
      break;
    case '\n':				/* Must be escaped for logs */
      *to++= '\\';
      *to++= 'n';
      break;
    case '\r':
      *to++= '\\';
      *to++= 'r';
      break;
    case '\\':
      *to++= '\\';
      *to++= '\\';
      break;
    case '\'':
      *to++= '\\';
      *to++= '\'';
      break;
    case '"':				/* Better safe than sorry */
      *to++= '\\';
      *to++= '"';
      break;
    case '\032':			/* This gives problems on Win32 */
      *to++= '\\';
      *to++= 'Z';
      break;
    default:
      *to++= *from;
    }
  }
  return to;
}

void STDCALL
myodbc_remove_escape(MYSQL *mysql,char *name)
{
  char *to;
#ifdef USE_MB
  my_bool use_mb_flag=use_mb(mysql->charset);
  char *end;
  LINT_INIT(end);
  if (use_mb_flag)
    for (end=name; *end ; end++) ;
#endif

  for (to=name ; *name ; name++)
  {
#ifdef USE_MB
    int l;
    if (use_mb_flag && (l = my_ismbchar( mysql->charset, name , end ) ) )
    {
      while (l--)
	*to++ = *name++;
      name--;
      continue;
    }
#endif
    if (*name == '\\' && name[1])
      name++;
    *to++= *name;
  }
  *to=0;
}
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/********************************************************************

 Implementation of new client-server prototypes for 4.1 version
 starts from here ..

 mysql_* are real prototypes used by applications

*********************************************************************/

/********************************************************************
 Misc Utility functions
********************************************************************/

/*
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  Set the internal stmt error messages
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*/

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static void set_stmt_error(MYSQL_STMT * stmt, int errcode,
			   const char *sqlstate)
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{
  DBUG_ENTER("set_stmt_error");
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  DBUG_PRINT("enter", ("error: %d '%s'", errcode, ER(errcode)));
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  DBUG_ASSERT(stmt != 0);

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  stmt->last_errno= errcode;
  strmov(stmt->last_error, ER(errcode));
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  strmov(stmt->sqlstate, sqlstate);
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  DBUG_VOID_RETURN;
}

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/*
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  Copy error message to statement handler
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*/

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static void set_stmt_errmsg(MYSQL_STMT * stmt, const char *err, int errcode,
			    const char *sqlstate)
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{
  DBUG_ENTER("set_stmt_error_msg");
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  DBUG_PRINT("enter", ("error: %d/%s '%s'", errcode, sqlstate, err));
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  DBUG_ASSERT(stmt != 0);

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  stmt->last_errno= errcode;
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  if (err && err[0])
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    strmov(stmt->last_error, err);
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  strmov(stmt->sqlstate, sqlstate);
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  DBUG_VOID_RETURN;
}

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/*
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  Set the internal error message to mysql handler
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*/

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static void set_mysql_error(MYSQL * mysql, int errcode, const char *sqlstate)
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{
  DBUG_ENTER("set_mysql_error");
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  DBUG_PRINT("enter", ("error :%d '%s'", errcode, ER(errcode)));
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  DBUG_ASSERT(mysql != 0);

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  mysql->net.last_errno= errcode;
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  strmov(mysql->net.last_error, ER(errcode));
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  strmov(mysql->net.sqlstate, sqlstate);
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}


/*
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  Reallocate the NET package to be at least of 'length' bytes
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  SYNPOSIS
   my_realloc_str()
   net			The NET structure to modify
   int length		Ensure that net->buff is at least this big
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  RETURN VALUES
  0	ok
  1	Error
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*/

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static my_bool my_realloc_str(NET *net, ulong length)
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{
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  ulong buf_length= (ulong) (net->write_pos - net->buff);
  my_bool res=0;
  DBUG_ENTER("my_realloc_str");
  if (buf_length + length > net->max_packet)
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  {
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    res= net_realloc(net, buf_length + length);
    net->write_pos= net->buff+ buf_length;
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  }
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  DBUG_RETURN(res);
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}

/********************************************************************
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  Prepare related implementations
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********************************************************************/

/*
  Read the prepare statement results ..
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  NOTE
    This is only called for connection to servers that supports
    prepared statements (and thus the 4.1 protocol)

  RETURN VALUES
    0	ok
    1	error
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*/

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static my_bool read_prepare_result(MYSQL *mysql, MYSQL_STMT *stmt)
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{
  uchar *pos;
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  uint field_count;
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  ulong length, param_count;
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  MYSQL_DATA *fields_data;
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  DBUG_ENTER("read_prepare_result");
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  mysql= mysql->last_used_con;
  if ((length= net_safe_read(mysql)) == packet_error)
    DBUG_RETURN(1);
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  pos= (uchar*) mysql->net.read_pos;
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  stmt->stmt_id= uint4korr(pos+1); pos+= 5;
  field_count=   uint2korr(pos);   pos+= 2;
  param_count=   uint2korr(pos);   pos+= 2;
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  if (field_count != 0)
  {
    if (!(mysql->server_status & SERVER_STATUS_AUTOCOMMIT))
      mysql->server_status|= SERVER_STATUS_IN_TRANS;
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    mysql->extra_info= net_field_length_ll(&pos);
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    if (!(fields_data= read_rows(mysql, (MYSQL_FIELD*) 0, 7)))
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      DBUG_RETURN(1);
    if (!(stmt->fields= unpack_fields(fields_data,&stmt->mem_root,
				      field_count,0,
				      mysql->server_capabilities)))
      DBUG_RETURN(1);
  }
  if (!(stmt->params= (MYSQL_BIND *) alloc_root(&stmt->mem_root,
						sizeof(MYSQL_BIND)*
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                                                (param_count + 
                                                 field_count))))
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  {
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    set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
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    DBUG_RETURN(0);
  }
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  stmt->bind=	      (stmt->params + param_count);
  stmt->field_count=  (uint) field_count;
  stmt->param_count=  (ulong) param_count;
  mysql->status=      MYSQL_STATUS_READY;
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  DBUG_RETURN(0);
}


/*
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  Prepare the query and return the new statement handle to
  caller.

  Also update the total parameter count along with resultset
  metadata information by reading from server
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*/

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MYSQL_STMT *STDCALL
mysql_prepare(MYSQL  *mysql, const char *query, ulong length)
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{
  MYSQL_STMT  *stmt;
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  DBUG_ENTER("mysql_prepare");
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  DBUG_ASSERT(mysql != 0);

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#ifdef CHECK_EXTRA_ARGUMENTS
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  if (!query)
  {
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    set_mysql_error(mysql, CR_NULL_POINTER, unknown_sqlstate);
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    DBUG_RETURN(0);
  }
#endif

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  if (!(stmt= (MYSQL_STMT *) my_malloc(sizeof(MYSQL_STMT),
				       MYF(MY_WME | MY_ZEROFILL))) ||
      !(stmt->query= my_strdup_with_length((byte *) query, length, MYF(0))))
  {
    my_free((gptr) stmt, MYF(MY_ALLOW_ZERO_PTR));
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    set_mysql_error(mysql, CR_OUT_OF_MEMORY, unknown_sqlstate);
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    DBUG_RETURN(0);
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  }
  if (simple_command(mysql, COM_PREPARE, query, length, 1))
  {
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    stmt_close(stmt, 1);
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    DBUG_RETURN(0);
  }

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  init_alloc_root(&stmt->mem_root,8192,0);
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  if (read_prepare_result(mysql, stmt))
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  {
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    stmt_close(stmt, 1);
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    DBUG_RETURN(0);
  }
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  stmt->state= MY_ST_PREPARE;
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  stmt->mysql= mysql;
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  mysql->stmts= list_add(mysql->stmts, &stmt->list);
  stmt->list.data= stmt;
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  DBUG_PRINT("info", ("Parameter count: %ld", stmt->param_count));
  DBUG_RETURN(stmt);
}

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/*
  Get the execute query meta information for non-select 
  statements (on demand).
*/

unsigned int alloc_stmt_fields(MYSQL_STMT *stmt)
{
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  MYSQL_FIELD *fields, *field, *end;
  MEM_ROOT *alloc= &stmt->mem_root;
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  MYSQL *mysql= stmt->mysql->last_used_con;
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  if (stmt->state != MY_ST_EXECUTE || !mysql->field_count)
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    return 0;
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  stmt->field_count= mysql->field_count;
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  /*
    Get the field information for non-select statements 
    like SHOW and DESCRIBE commands
  */
  if (!(stmt->fields= (MYSQL_FIELD *) alloc_root(alloc, 
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						 sizeof(MYSQL_FIELD) *
						 stmt->field_count)) || 
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      !(stmt->bind= (MYSQL_BIND *) alloc_root(alloc, 
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					      sizeof(MYSQL_BIND) *
					      stmt->field_count)))
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    return 0;
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  for (fields= mysql->fields, end= fields+stmt->field_count, 
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	 field= stmt->fields;
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       field && fields < end; fields++, field++)
  {
    field->db       = strdup_root(alloc,fields->db);
    field->table    = strdup_root(alloc,fields->table);
    field->org_table= strdup_root(alloc,fields->org_table);
    field->name     = strdup_root(alloc,fields->name);
    field->org_name = strdup_root(alloc,fields->org_name);
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    field->charsetnr= fields->charsetnr;
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    field->length   = fields->length;
    field->type     = fields->type;
    field->flags    = fields->flags;
    field->decimals = fields->decimals;
    field->def      = fields->def ? strdup_root(alloc,fields->def): 0;
    field->max_length= 0;
  }
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  return stmt->field_count;
}
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/*
  Returns prepared meta information in the form of resultset
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  to client.
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*/

MYSQL_RES * STDCALL
mysql_prepare_result(MYSQL_STMT *stmt)
{
  MYSQL_RES *result;
  DBUG_ENTER("mysql_prepare_result");
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  if (!stmt->field_count || !stmt->fields)
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  {
    if (!alloc_stmt_fields(stmt))
      DBUG_RETURN(0);
  }  
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  if (!(result=(MYSQL_RES*) my_malloc(sizeof(*result)+
				      sizeof(ulong)*stmt->field_count,
				      MYF(MY_WME | MY_ZEROFILL))))
    return 0;

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  result->methods= stmt->mysql->methods;
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  result->eof=1;	/* Marker for buffered */
  result->fields=	stmt->fields;
  result->field_count=	stmt->field_count;
  DBUG_RETURN(result);
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}

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/*
  Returns parameter columns meta information in the form of 
  resultset.
*/

MYSQL_RES * STDCALL
mysql_param_result(MYSQL_STMT *stmt)
{
  DBUG_ENTER("mysql_param_result");
  
  if (!stmt->param_count)
    DBUG_RETURN(0);

  /*
    TODO: Fix this when server sends the information. 
    Till then keep a dummy prototype 
  */
  DBUG_RETURN(0); 
}


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/********************************************************************
 Prepare-execute, and param handling
*********************************************************************/

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/*
  Store the buffer type
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*/

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static void store_param_type(NET *net, uint type)
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{
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  int2store(net->write_pos, type);
  net->write_pos+=2;
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}

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/****************************************************************************
  Functions to store parameter data from a prepared statement.
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  All functions has the following characteristics:
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  SYNOPSIS
    store_param_xxx()
    net			MySQL NET connection
    param		MySQL bind param

  RETURN VALUES
    0	ok
    1	Error	(Can't alloc net->buffer)
****************************************************************************/


static void store_param_tinyint(NET *net, MYSQL_BIND *param)
{
  *(net->write_pos++)= (uchar) *param->buffer;
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}

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static void store_param_short(NET *net, MYSQL_BIND *param)
{
  short value= *(short*) param->buffer;
  int2store(net->write_pos,value);
  net->write_pos+=2;
}
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static void store_param_int32(NET *net, MYSQL_BIND *param)
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{
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  int32 value= *(int32*) param->buffer;
  int4store(net->write_pos,value);
  net->write_pos+=4;
}
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static void store_param_int64(NET *net, MYSQL_BIND *param)
{
  longlong value= *(longlong*) param->buffer;
  int8store(net->write_pos,value);
  net->write_pos+= 8;
}
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static void store_param_float(NET *net, MYSQL_BIND *param)
{
  float value= *(float*) param->buffer;
  float4store(net->write_pos, value);
  net->write_pos+= 4;
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}

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static void store_param_double(NET *net, MYSQL_BIND *param)
{
  double value= *(double*) param->buffer;
  float8store(net->write_pos, value);
  net->write_pos+= 8;
}
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static void store_param_time(NET *net, MYSQL_BIND *param)
{
  MYSQL_TIME *tm= (MYSQL_TIME *) param->buffer;
  char buff[15], *pos;
  uint length;

  pos= buff+1;
  pos[0]= tm->neg ? 1: 0;
  int4store(pos+1, tm->day);
  pos[5]= (uchar) tm->hour;
  pos[6]= (uchar) tm->minute;
  pos[7]= (uchar) tm->second;
  int4store(pos+8, tm->second_part);
  if (tm->second_part)
    length= 11;
  else if (tm->hour || tm->minute || tm->second || tm->day)
    length= 8;
  else
    length= 0;
  buff[0]= (char) length++;  
  memcpy((char *)net->write_pos, buff, length);
  net->write_pos+= length;
}

static void net_store_datetime(NET *net, MYSQL_TIME *tm)
{
  char buff[12], *pos;
  uint length;

  pos= buff+1;

  int2store(pos, tm->year);
  pos[2]= (uchar) tm->month;
  pos[3]= (uchar) tm->day;
  pos[4]= (uchar) tm->hour;
  pos[5]= (uchar) tm->minute;
  pos[6]= (uchar) tm->second;
  int4store(pos+7, tm->second_part);
  if (tm->second_part)
    length= 11;
  else if (tm->hour || tm->minute || tm->second)
    length= 7;
  else if (tm->year || tm->month || tm->day)
    length= 4;
  else
    length= 0;
  buff[0]= (char) length++;  
  memcpy((char *)net->write_pos, buff, length);
  net->write_pos+= length;
}

static void store_param_date(NET *net, MYSQL_BIND *param)
{
  MYSQL_TIME *tm= (MYSQL_TIME *) param->buffer;
  tm->hour= tm->minute= tm->second= 0;
  tm->second_part= 0;
  net_store_datetime(net, tm);
}

static void store_param_datetime(NET *net, MYSQL_BIND *param)
{
  MYSQL_TIME *tm= (MYSQL_TIME *) param->buffer;
  net_store_datetime(net, tm);
}
    
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static void store_param_str(NET *net, MYSQL_BIND *param)
1890
{
1891
  ulong length= param->length ? *param->length : param->buffer_length;
1892 1893
  char *to= (char *) net_store_length((char *) net->write_pos, length);
  memcpy(to, param->buffer, length);
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  net->write_pos= (uchar*) to+length;
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}

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/*
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  Mark if the parameter is NULL.

  SYNOPSIS
    store_param_null()
    net			MySQL NET connection
    param		MySQL bind param

  DESCRIPTION
    A data package starts with a string of bits where we set a bit
    if a parameter is NULL
1909 1910
*/

1911
static void store_param_null(NET *net, MYSQL_BIND *param)
1912
{
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  uint pos= param->param_number;
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  net->buff[pos/8]|=  (uchar) (1 << (pos & 7));
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}
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/*
  Set parameter data by reading from input buffers from the
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  client application
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*/

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static my_bool store_param(MYSQL_STMT *stmt, MYSQL_BIND *param)
1925
{
1926 1927 1928
  MYSQL *mysql= stmt->mysql;
  NET	*net  = &mysql->net;
  DBUG_ENTER("store_param");
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  DBUG_PRINT("enter",("type: %d, buffer:%lx, length: %lu  is_null: %d",
		      param->buffer_type,
		      param->buffer ? param->buffer : "0", *param->length,
		      *param->is_null));

  if (*param->is_null)
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    store_param_null(net, param);
  else
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  {
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    /*
      Param->length should ALWAYS point to the correct length for the type
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      Either to the length pointer given by the user or param->buffer_length
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    */
    if ((my_realloc_str(net, 9 + *param->length)))
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    {
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      set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
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      DBUG_RETURN(1);
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    }
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    (*param->store_param_func)(net, param);
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  }
  DBUG_RETURN(0);
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}

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/*
  Send the prepare query to server for execution
*/

1957
static my_bool execute(MYSQL_STMT * stmt, char *packet, ulong length)
1958
{
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  MYSQL *mysql= stmt->mysql;
  NET	*net= &mysql->net;
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  char buff[MYSQL_STMT_HEADER];
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  DBUG_ENTER("execute");
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  DBUG_PRINT("enter",("packet: %s, length :%d",packet ? packet :" ", length));

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  mysql->last_used_con= mysql;
  int4store(buff, stmt->stmt_id);		/* Send stmt id to server */
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  if ((*mysql->methods->advanced_command)(mysql, COM_EXECUTE, buff, 
					  MYSQL_STMT_HEADER, packet, 
					  length, 1) ||
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      mysql_read_query_result(mysql))
  {
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    set_stmt_errmsg(stmt, net->last_error, net->last_errno, net->sqlstate);
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    DBUG_RETURN(1);
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  }
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  stmt->state= MY_ST_EXECUTE;
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  mysql_free_result(stmt->result);
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  stmt->result= (MYSQL_RES *)0;
  stmt->result_buffered= 0;
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  stmt->current_row= 0;
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  DBUG_RETURN(0);
}

1983 1984 1985

/*
  Execute the prepare query
1986 1987
*/

1988
int STDCALL mysql_execute(MYSQL_STMT *stmt)
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{
  DBUG_ENTER("mysql_execute");

  if (stmt->state == MY_ST_UNKNOWN)
  {
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    set_stmt_error(stmt, CR_NO_PREPARE_STMT, unknown_sqlstate);
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    DBUG_RETURN(1);
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  }
  if (stmt->param_count)
  {
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    NET        *net= &stmt->mysql->net;
    MYSQL_BIND *param, *param_end;
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    char       *param_data;
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    ulong length;
    uint null_count;
    my_bool    result;
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#ifdef CHECK_EXTRA_ARGUMENTS
    if (!stmt->param_buffers)
2008 2009
    {
      /* Parameters exists, but no bound buffers */
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      set_stmt_error(stmt, CR_NOT_ALL_PARAMS_BOUND, unknown_sqlstate);
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      DBUG_RETURN(1);
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    }
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#endif
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    net_clear(net);				/* Sets net->write_pos */
    /* Reserve place for null-marker bytes */
    null_count= (stmt->param_count+7) /8;
    bzero((char*) net->write_pos, null_count);
    net->write_pos+= null_count;
    param_end= stmt->params + stmt->param_count;

    /* In case if buffers (type) altered, indicate to server */
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    *(net->write_pos)++= (uchar) stmt->send_types_to_server;
    if (stmt->send_types_to_server)
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    {
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      /*
	Store types of parameters in first in first package
	that is sent to the server.
      */
      for (param= stmt->params;	param < param_end ; param++)
	store_param_type(net, (uint) param->buffer_type);
    }

    for (param= stmt->params; param < param_end; param++)
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    {
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      /* check if mysql_long_data() was used */
      if (param->long_data_used)
	param->long_data_used= 0;	/* Clear for next execute call */
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      else if (store_param(stmt, param))
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	DBUG_RETURN(1);
2040
    }
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    length= (ulong) (net->write_pos - net->buff);
    /* TODO: Look into avoding the following memdup */
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    if (!(param_data= my_memdup((const char*) net->buff, length, MYF(0))))
2044
    {
2045
      set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
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      DBUG_RETURN(1);
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    }
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    net->write_pos= net->buff;			/* Reset for net_write() */
    result= execute(stmt, param_data, length);
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    stmt->send_types_to_server=0;
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    my_free(param_data, MYF(MY_WME));
2052 2053 2054
    DBUG_RETURN(result);
  }
  DBUG_RETURN((int) execute(stmt,0,0));
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}

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/*
  Return total parameters count in the statement
*/

ulong STDCALL mysql_param_count(MYSQL_STMT * stmt)
{
  DBUG_ENTER("mysql_param_count");
  DBUG_RETURN(stmt->param_count);
}

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/*
  Return total affected rows from the last statement
*/

my_ulonglong STDCALL mysql_stmt_affected_rows(MYSQL_STMT *stmt)
{
  return stmt->mysql->last_used_con->affected_rows;
}
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static my_bool int_is_null_true= 1;		/* Used for MYSQL_TYPE_NULL */
static my_bool int_is_null_false= 0;
static my_bool int_is_null_dummy;
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static unsigned long param_length_is_dummy;
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2083
/*
2084
  Setup the parameter data buffers from application
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*/

2087
my_bool STDCALL mysql_bind_param(MYSQL_STMT *stmt, MYSQL_BIND * bind)
2088
{
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  uint count=0;
  MYSQL_BIND *param, *end;
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  DBUG_ENTER("mysql_bind_param");

#ifdef CHECK_EXTRA_ARGUMENTS
  if (stmt->state == MY_ST_UNKNOWN)
  {
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    set_stmt_error(stmt, CR_NO_PREPARE_STMT, unknown_sqlstate);
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    DBUG_RETURN(1);
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  }
  if (!stmt->param_count)
  {
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    set_stmt_error(stmt, CR_NO_PARAMETERS_EXISTS, unknown_sqlstate);
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    DBUG_RETURN(1);
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  }
#endif

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  /* Allocated on prepare */
  memcpy((char*) stmt->params, (char*) bind,
	 sizeof(MYSQL_BIND) * stmt->param_count);

  for (param= stmt->params, end= param+stmt->param_count;
       param < end ;
       param++)
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  {
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    param->param_number= count++;
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    param->long_data_used= 0;

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    /*
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      If param->length is not given, change it to point to buffer_length.
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      This way we can always use *param->length to get the length of data
    */
    if (!param->length)
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      param->length= &param->buffer_length;
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    /* If param->is_null is not set, then the value can never be NULL */
    if (!param->is_null)
      param->is_null= &int_is_null_false;

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    /* Setup data copy functions for the different supported types */
    switch (param->buffer_type) {
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    case MYSQL_TYPE_NULL:
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      param->is_null= &int_is_null_true;
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      break;
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    case MYSQL_TYPE_TINY:
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      /* Force param->length as this is fixed for this type */
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      param->length= &param->buffer_length;
      param->buffer_length= 1;
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      param->store_param_func= store_param_tinyint;
      break;
    case MYSQL_TYPE_SHORT:
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      param->length= &param->buffer_length;
      param->buffer_length= 2;
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      param->store_param_func= store_param_short;
      break;
    case MYSQL_TYPE_LONG:
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      param->length= &param->buffer_length;
      param->buffer_length= 4;
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      param->store_param_func= store_param_int32;
      break;
    case MYSQL_TYPE_LONGLONG:
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      param->length= &param->buffer_length;
      param->buffer_length= 8;
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      param->store_param_func= store_param_int64;
      break;
    case MYSQL_TYPE_FLOAT:
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      param->length= &param->buffer_length;
      param->buffer_length= 4;
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      param->store_param_func= store_param_float;
      break;
    case MYSQL_TYPE_DOUBLE:
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      param->length= &param->buffer_length;
      param->buffer_length= 8;
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      param->store_param_func= store_param_double;
      break;
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    case MYSQL_TYPE_TIME:
      /* Buffer length ignored for DATE, TIME and DATETIME */
      param->store_param_func= store_param_time;
      break;
    case MYSQL_TYPE_DATE:
      param->store_param_func= store_param_date;
      break;
    case MYSQL_TYPE_DATETIME:
    case MYSQL_TYPE_TIMESTAMP:
      param->store_param_func= store_param_datetime;
      break;
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    case MYSQL_TYPE_TINY_BLOB:
    case MYSQL_TYPE_MEDIUM_BLOB:
    case MYSQL_TYPE_LONG_BLOB:
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    case MYSQL_TYPE_BLOB:
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    case MYSQL_TYPE_VAR_STRING:
    case MYSQL_TYPE_STRING:
      param->store_param_func= store_param_str;
      break;
    default:
2184
      strmov(stmt->sqlstate, unknown_sqlstate);
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      sprintf(stmt->last_error,
	      ER(stmt->last_errno= CR_UNSUPPORTED_PARAM_TYPE),
2187
	      param->buffer_type, count);
2188
      DBUG_RETURN(1);
2189 2190
    }
  }
2191
  /* We have to send/resendtype information to MySQL */
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  stmt->send_types_to_server= 1;
  stmt->param_buffers= 1;
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  DBUG_RETURN(0);
}

2197

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/********************************************************************
 Long data implementation
*********************************************************************/

/*
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  Send long data in pieces to the server

  SYNOPSIS
    mysql_send_long_data()
    stmt			Statement handler
    param_number		Parameter number (0 - N-1)
    data			Data to send to server
    length			Length of data to send (may be 0)
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2212
  RETURN VALUES
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    0	ok
    1	error
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*/


2218 2219
my_bool STDCALL
mysql_send_long_data(MYSQL_STMT *stmt, uint param_number,
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		     const char *data, ulong length)
2221 2222 2223
{
  MYSQL_BIND *param;
  DBUG_ENTER("mysql_send_long_data");
2224
  DBUG_ASSERT(stmt != 0);
2225
  DBUG_PRINT("enter",("param no : %d, data : %lx, length : %ld",
2226
		      param_number, data, length));
2227

2228
  if (param_number >= stmt->param_count)
2229
  {
2230
    set_stmt_error(stmt, CR_INVALID_PARAMETER_NO, unknown_sqlstate);
2231 2232
    DBUG_RETURN(1);
  }
2233
  param= stmt->params+param_number;
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  if (param->buffer_type < MYSQL_TYPE_TINY_BLOB ||
      param->buffer_type > MYSQL_TYPE_STRING)
  {
    /*
      Long data handling should be used only for string/binary
      types only
    */
2241
    strmov(stmt->sqlstate, unknown_sqlstate);
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    sprintf(stmt->last_error, ER(stmt->last_errno= CR_INVALID_BUFFER_USE),
	    param->param_number);
    DBUG_RETURN(1);
  }
  /* Mark for execute that the result is already sent */
  param->long_data_used= 1;
2248
  if (length)
2249
  {
2250 2251 2252 2253 2254 2255
    MYSQL *mysql= stmt->mysql;
    char   *packet, extra_data[MYSQL_LONG_DATA_HEADER];

    packet= extra_data;
    int4store(packet, stmt->stmt_id);	   packet+=4;
    int2store(packet, param_number);	   packet+=2;
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    /*
      Note that we don't get any ok packet from the server in this case
      This is intentional to save bandwidth.
    */
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    if ((*mysql->methods->advanced_command)(mysql, COM_LONG_DATA, extra_data,
					    MYSQL_LONG_DATA_HEADER, data, 
					    length, 1))
2264
    {
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      set_stmt_errmsg(stmt, mysql->net.last_error,
		      mysql->net.last_errno, mysql->net.sqlstate);
2267 2268 2269 2270 2271 2272
      DBUG_RETURN(1);
    }
  }
  DBUG_RETURN(0);
}

2273

2274
/********************************************************************
2275
  Fetch-bind related implementations
2276 2277
*********************************************************************/

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/****************************************************************************
  Functions to fetch data to application buffers

  All functions has the following characteristics:

  SYNOPSIS
    fetch_result_xxx()
    param   MySQL bind param
    row     Row value

  RETURN VALUES
    0	ok
    1	Error	(Can't alloc net->buffer)
****************************************************************************/

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static void set_zero_time(MYSQL_TIME *tm)
2294
{
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  tm->year= tm->month= tm->day= 0;
  tm->hour= tm->minute= tm->second= 0;
  tm->second_part= 0;
  tm->neg= (bool)0;
}

/* Read TIME from binary packet and return it to MYSQL_TIME */
static uint read_binary_time(MYSQL_TIME *tm, uchar **pos)
{
  uchar *to;
  uint  length;
 
  if (!(length= net_field_length(pos)))
  {
    set_zero_time(tm);
    return 0;
  }
  
  to= *pos;     
  tm->second_part= (length > 8 ) ? (ulong) sint4korr(to+7): 0;

  tm->day=    (ulong) sint4korr(to+1);
  tm->hour=   (uint) to[5];
  tm->minute= (uint) to[6];
  tm->second= (uint) to[7];

  tm->year= tm->month= 0;
  tm->neg= (bool)to[0];
  return length;
}

/* Read DATETIME from binary packet and return it to MYSQL_TIME */
static uint read_binary_datetime(MYSQL_TIME *tm, uchar **pos)
{
  uchar *to;
  uint  length;
 
  if (!(length= net_field_length(pos)))
  {
    set_zero_time(tm);
    return 0;
  }
  
  to= *pos;     
  tm->second_part= (length > 7 ) ? (ulong) sint4korr(to+7): 0;
    
  if (length > 4)
  {
    tm->hour=   (uint) to[4];
    tm->minute= (uint) to[5];
    tm->second= (uint) to[6];
  }
  else
    tm->hour= tm->minute= tm->second= 0;
    
  tm->year=   (uint) sint2korr(to);
  tm->month=  (uint) to[2];
  tm->day=    (uint) to[3];
  tm->neg=    0;
  return length;
}

/* Read DATE from binary packet and return it to MYSQL_TIME */
static uint read_binary_date(MYSQL_TIME *tm, uchar **pos)
{
  uchar *to;
  uint  length;
 
  if (!(length= net_field_length(pos)))
  {
    set_zero_time(tm);
2366
    return 0;
2367
  }
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  to= *pos;     
  tm->year =  (uint) sint2korr(to);
  tm->month=  (uint) to[2];
  tm->day= (uint) to[3];

  tm->hour= tm->minute= tm->second= 0;
  tm->second_part= 0;
  tm->neg= 0;
  return length;
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}

2380
/* Convert Numeric to buffer types */
2381 2382 2383 2384
static void send_data_long(MYSQL_BIND *param, longlong value)
{  
  char *buffer= param->buffer;
  
2385
  switch (param->buffer_type) {
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  case MYSQL_TYPE_NULL: /* do nothing */
    break;
2388 2389 2390 2391
  case MYSQL_TYPE_TINY:
    *param->buffer= (uchar) value;
    break;
  case MYSQL_TYPE_SHORT:
2392
    int2store(buffer, value);
2393 2394
    break;
  case MYSQL_TYPE_LONG:
2395
    int4store(buffer, value);
2396 2397
    break;
  case MYSQL_TYPE_LONGLONG:
2398
    int8store(buffer, value);
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    break;
  case MYSQL_TYPE_FLOAT:
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  {
    float data= (float)value;
    float4store(buffer, data);
    break;
  }
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  case MYSQL_TYPE_DOUBLE:
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  {
    double data= (double)value;
    float8store(buffer, data);
    break;
  }
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  default:
2413
  {
2414
    char tmp[22];				/* Enough for longlong */
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    uint length= (uint)(longlong10_to_str(value,(char *)tmp,10)-tmp);
    ulong copy_length= min((ulong)length-param->offset, param->buffer_length);
    memcpy(buffer, (char *)tmp+param->offset, copy_length);
    *param->length= length;		
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    if (copy_length != param->buffer_length)
      *(buffer+copy_length)= '\0';
  }
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  } 
}

2426

2427
/* Convert Double to buffer types */
2428

2429 2430 2431 2432 2433
static void send_data_double(MYSQL_BIND *param, double value)
{  
  char *buffer= param->buffer;

  switch(param->buffer_type) {
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  case MYSQL_TYPE_NULL: /* do nothing */
    break;
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  case MYSQL_TYPE_TINY:
    *buffer= (uchar)value;
    break;
  case MYSQL_TYPE_SHORT:
    int2store(buffer, (short)value);
    break;
  case MYSQL_TYPE_LONG:
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    int4store(buffer, (long)value);
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    break;
  case MYSQL_TYPE_LONGLONG:
    int8store(buffer, (longlong)value);
    break;
  case MYSQL_TYPE_FLOAT:
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  {
    float data= (float)value;
    float4store(buffer, data);
    break;
  }
2454
  case MYSQL_TYPE_DOUBLE:
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  {
    double data= (double)value;
    float8store(buffer, data);
    break;
  }
2460
  default:
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  {
2462
    char tmp[128];
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    uint length= my_sprintf(tmp,(tmp,"%g",value));
    ulong copy_length= min((ulong)length-param->offset, param->buffer_length);
    memcpy(buffer, (char *)tmp+param->offset, copy_length);
    *param->length= length;		
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    if (copy_length != param->buffer_length)
      *(buffer+copy_length)= '\0';
  }
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  } 
}

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2475
/* Convert string to buffer types */
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2477
static void send_data_str(MYSQL_BIND *param, char *value, uint length)
2478 2479
{  
  char *buffer= param->buffer;
2480
  int err=0;
2481 2482

  switch(param->buffer_type) {
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  case MYSQL_TYPE_NULL: /* do nothing */
    break;
2485
  case MYSQL_TYPE_TINY:
2486
  {
2487
    uchar data= (uchar)my_strntol(&my_charset_latin1,value,length,10,NULL,
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				  &err);
2489
    *buffer= data;
2490
    break;
2491
  }
2492 2493
  case MYSQL_TYPE_SHORT:
  {
2494
    short data= (short)my_strntol(&my_charset_latin1,value,length,10,NULL,
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				  &err);
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    int2store(buffer, data);
    break;
  }
  case MYSQL_TYPE_LONG:
  {
2501
    int32 data= (int32)my_strntol(&my_charset_latin1,value,length,10,NULL,
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				  &err);
2503 2504 2505 2506 2507
    int4store(buffer, data);    
    break;
  }
  case MYSQL_TYPE_LONGLONG:
  {
2508
    longlong data= my_strntoll(&my_charset_latin1,value,length,10,NULL,&err);
2509 2510 2511 2512 2513
    int8store(buffer, data);
    break;
  }
  case MYSQL_TYPE_FLOAT:
  {
2514
    float data = (float)my_strntod(&my_charset_latin1,value,length,NULL,&err);
2515 2516 2517 2518 2519
    float4store(buffer, data);
    break;
  }
  case MYSQL_TYPE_DOUBLE:
  {
2520
    double data= my_strntod(&my_charset_latin1,value,length,NULL,&err);
2521 2522 2523
    float8store(buffer, data);
    break;
  }
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  case MYSQL_TYPE_TINY_BLOB:
  case MYSQL_TYPE_MEDIUM_BLOB:
  case MYSQL_TYPE_LONG_BLOB:
  case MYSQL_TYPE_BLOB:
    *param->length= length;
    length= min(length-param->offset, param->buffer_length);
    memcpy(buffer, value+param->offset, length);
    break;
2532
  default:
2533
    *param->length= length;
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    length= min(length-param->offset, param->buffer_length);
    memcpy(buffer, value+param->offset, length);
2536
    if (length != param->buffer_length)
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      buffer[length]= '\0';
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  } 
}

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static void send_data_time(MYSQL_BIND *param, MYSQL_TIME ltime, 
                           uint length)
{
  switch (param->buffer_type) {
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  case MYSQL_TYPE_NULL: /* do nothing */
    break;
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  case MYSQL_TYPE_DATE:
  case MYSQL_TYPE_TIME:
  case MYSQL_TYPE_DATETIME:
  case MYSQL_TYPE_TIMESTAMP:
  {
    MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
    
    tm->year= ltime.year;
    tm->month= ltime.month;
    tm->day= ltime.day;

    tm->hour= ltime.hour;
    tm->minute= ltime.minute;
    tm->second= ltime.second;

    tm->second_part= ltime.second_part;
    tm->neg= ltime.neg;
    break;   
  }
  default:
  {
    char buff[25];
    
    if (!length)
      ltime.time_type= MYSQL_TIMESTAMP_NONE;
    switch (ltime.time_type) {
    case MYSQL_TIMESTAMP_DATE:
      length= my_sprintf(buff,(buff, "%04d-%02d-%02d", ltime.year,
2577
			       ltime.month,ltime.day));      
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      break;
    case MYSQL_TIMESTAMP_FULL:
      length= my_sprintf(buff,(buff, "%04d-%02d-%02d %02d:%02d:%02d",
	                       ltime.year,ltime.month,ltime.day,
	                       ltime.hour,ltime.minute,ltime.second));
      break;
    case MYSQL_TIMESTAMP_TIME:
      length= my_sprintf(buff, (buff, "%02d:%02d:%02d",
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				ltime.hour,ltime.minute,ltime.second));
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      break;
    default:
      length= 0;
      buff[0]='\0';
    }
    send_data_str(param, (char *)buff, length); 
  }
  }
}
                              

2598
/* Fetch data to buffers */
2599

2600 2601
static void fetch_results(MYSQL_BIND *param, uint field_type, uchar **row, 
                          my_bool field_is_unsigned)
2602 2603
{
  ulong length;
2604
  
2605 2606 2607
  switch (field_type) {
  case MYSQL_TYPE_TINY:
  {
2608
    char value= (char) **row;
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    longlong data= ((field_is_unsigned) ? (longlong) (unsigned char) value:
		    (longlong) value);
2611
    send_data_long(param,data);
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    length= 1;
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    break;
  }
  case MYSQL_TYPE_SHORT:
  case MYSQL_TYPE_YEAR:
  {
2618
    short value= sint2korr(*row);
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    longlong data= ((field_is_unsigned) ? (longlong) (unsigned short) value:
		    (longlong) value);
2621 2622
    send_data_long(param,data);
    length= 2;    
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    break;
  }
  case MYSQL_TYPE_LONG:
  {
2627
    long value= sint4korr(*row);
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    longlong data= ((field_is_unsigned) ? (longlong) (unsigned long) value:
		    (longlong) value);
2630
    send_data_long(param,data);
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    length= 4;
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    break;
  }
  case MYSQL_TYPE_LONGLONG:
  {
    longlong value= (longlong)sint8korr(*row);
    send_data_long(param,value);
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    length= 8;
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    break;
  }
  case MYSQL_TYPE_FLOAT:
  {
    float value;
    float4get(value,*row);
2645
    send_data_double(param,value);
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    length= 4;
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    break;
  }
  case MYSQL_TYPE_DOUBLE:
  {
    double value;
    float8get(value,*row);
2653
    send_data_double(param,value);
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    length= 8;
2655 2656 2657 2658
    break;
  }
  case MYSQL_TYPE_DATE:
  {
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    MYSQL_TIME tm;
 
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    length= read_binary_date(&tm, row);
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    tm.time_type= MYSQL_TIMESTAMP_DATE;
    send_data_time(param, tm, length);
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    break;
  }
  case MYSQL_TYPE_TIME:
  {
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    MYSQL_TIME tm;
 
    length= read_binary_time(&tm, row);
    tm.time_type= MYSQL_TIMESTAMP_TIME;
    send_data_time(param, tm, length);
    break;
  }
  case MYSQL_TYPE_DATETIME:
  case MYSQL_TYPE_TIMESTAMP:
  {
    MYSQL_TIME tm;
 
    length= read_binary_datetime(&tm, row);
    tm.time_type= MYSQL_TIMESTAMP_FULL;
    send_data_time(param, tm, length);
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    break;
  }
  default:      
    length= net_field_length(row); 
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    send_data_str(param,(char*) *row,length);
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    break;
  }
  *row+= length;
}

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static void fetch_result_tinyint(MYSQL_BIND *param, uchar **row)
{
  *param->buffer= (uchar) **row;
2697
  (*row)++;
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}

static void fetch_result_short(MYSQL_BIND *param, uchar **row)
{
2702 2703 2704
  short value = (short)sint2korr(*row);
  int2store(param->buffer, value);
  *row+= 2;
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}

static void fetch_result_int32(MYSQL_BIND *param, uchar **row)
{
2709
  int32 value= (int32)sint4korr(*row);
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  int4store(param->buffer, value);
2711
  *row+= 4;
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}

static void fetch_result_int64(MYSQL_BIND *param, uchar **row)
2715 2716
{  
  longlong value= (longlong)sint8korr(*row);
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  int8store(param->buffer, value);
2718
  *row+= 8;
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}

static void fetch_result_float(MYSQL_BIND *param, uchar **row)
{
  float value;
  float4get(value,*row);
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  float4store(param->buffer, value);
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  *row+= 4;
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}

static void fetch_result_double(MYSQL_BIND *param, uchar **row)
{
  double value;
  float8get(value,*row);
  float8store(param->buffer, value);
2734
  *row+= 8;
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}

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static void fetch_result_time(MYSQL_BIND *param, uchar **row)
{
  MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
  *row+= read_binary_time(tm, row);
}

static void fetch_result_date(MYSQL_BIND *param, uchar **row)
{
  MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
  *row+= read_binary_date(tm, row);
}

static void fetch_result_datetime(MYSQL_BIND *param, uchar **row)
{
  MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
  *row+= read_binary_datetime(tm, row);
}

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static void fetch_result_bin(MYSQL_BIND *param, uchar **row)
{  
  ulong length= net_field_length(row);
  ulong copy_length= min(length, param->buffer_length);
  memcpy(param->buffer, (char *)*row, copy_length);
  *param->length= length;		
  *row+= length;
}
2763

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static void fetch_result_str(MYSQL_BIND *param, uchar **row)
{
  ulong length= net_field_length(row);
2767 2768
  ulong copy_length= min(length, param->buffer_length);
  memcpy(param->buffer, (char *)*row, copy_length);
2769 2770 2771
  /* Add an end null if there is room in the buffer */
  if (copy_length != param->buffer_length)
    *(param->buffer+copy_length)= '\0';
2772
  *param->length= length;			/* return total length */
2773
  *row+= length;
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}

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static uint default_binary_field_length(uint field_type)
{
  switch(field_type) {
  case MYSQL_TYPE_TINY:
    return 1;
  case MYSQL_TYPE_SHORT:
    return 2;
  case MYSQL_TYPE_LONG:
  case MYSQL_TYPE_FLOAT:
    return 4;
  case MYSQL_TYPE_LONGLONG:
  case MYSQL_TYPE_DOUBLE:
    return 8;
  default:
    return 0;
  } 
}


2795
/*
2796
  Setup the bind buffers for resultset processing
2797 2798
*/

2799
my_bool STDCALL mysql_bind_result(MYSQL_STMT *stmt, MYSQL_BIND *bind)
2800
{
2801 2802
  MYSQL_BIND *param, *end;
  ulong       bind_count;
2803
  uint        param_count= 0;
2804 2805 2806
  DBUG_ENTER("mysql_bind_result");
  DBUG_ASSERT(stmt != 0);

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#ifdef CHECK_EXTRA_ARGUMENTS
2808 2809
  if (stmt->state == MY_ST_UNKNOWN)
  {
2810
    set_stmt_error(stmt, CR_NO_PREPARE_STMT, unknown_sqlstate);
2811 2812
    DBUG_RETURN(1);
  }
2813 2814
  if (!bind)
  {
2815
    set_stmt_error(stmt, CR_NULL_POINTER, unknown_sqlstate);
2816
    DBUG_RETURN(1);
2817
  }
2818
#endif
2819 2820 2821 2822
  if (!(bind_count= stmt->field_count) && 
      !(bind_count= alloc_stmt_fields(stmt)))
    DBUG_RETURN(0);
  
2823 2824
  memcpy((char*) stmt->bind, (char*) bind,
	 sizeof(MYSQL_BIND)*bind_count);
2825

2826
  for (param= stmt->bind, end= param+bind_count; param < end ; param++)
2827
  {
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    /*
      Set param->is_null to point to a dummy variable if it's not set.
      This is to make the excute code easier
    */
    if (!param->is_null)
      param->is_null= &int_is_null_dummy;

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    if (!param->length)
2836
      param->length= &param_length_is_dummy;
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2838
    param->param_number= param_count++;
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    param->offset= 0;

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    /* Setup data copy functions for the different supported types */
    switch (param->buffer_type) {
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    case MYSQL_TYPE_NULL: /* for dummy binds */
      break;
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    case MYSQL_TYPE_TINY:
      param->fetch_result= fetch_result_tinyint;
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      *param->length= 1;
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      break;
    case MYSQL_TYPE_SHORT:
      param->fetch_result= fetch_result_short;
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      *param->length= 2;
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      break;
    case MYSQL_TYPE_LONG:
      param->fetch_result= fetch_result_int32;
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      *param->length= 4;
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      break;
    case MYSQL_TYPE_LONGLONG:
      param->fetch_result= fetch_result_int64;
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      *param->length= 8;
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      break;
    case MYSQL_TYPE_FLOAT:
      param->fetch_result= fetch_result_float;
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      *param->length= 4;
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      break;
    case MYSQL_TYPE_DOUBLE:
      param->fetch_result= fetch_result_double;
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      *param->length= 8;
      break;
    case MYSQL_TYPE_TIME:
      param->fetch_result= fetch_result_time;
      *param->length= sizeof(MYSQL_TIME);
      break;
    case MYSQL_TYPE_DATE:
      param->fetch_result= fetch_result_date;
      *param->length= sizeof(MYSQL_TIME);
      break;
    case MYSQL_TYPE_DATETIME:
    case MYSQL_TYPE_TIMESTAMP:
      param->fetch_result= fetch_result_datetime;
      *param->length= sizeof(MYSQL_TIME);
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      break;
    case MYSQL_TYPE_TINY_BLOB:
    case MYSQL_TYPE_MEDIUM_BLOB:
    case MYSQL_TYPE_LONG_BLOB:
2885
    case MYSQL_TYPE_BLOB:
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      DBUG_ASSERT(param->buffer_length != 0);
      param->fetch_result= fetch_result_bin;
      break;
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    case MYSQL_TYPE_VAR_STRING:
    case MYSQL_TYPE_STRING:
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      DBUG_ASSERT(param->buffer_length != 0);
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      param->fetch_result= fetch_result_str;
      break;
    default:
2895
      strmov(stmt->sqlstate, unknown_sqlstate);
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      sprintf(stmt->last_error,
	      ER(stmt->last_errno= CR_UNSUPPORTED_PARAM_TYPE),
2898
	      param->buffer_type, param_count);
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      DBUG_RETURN(1);
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    }
2901
  }
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  stmt->res_buffers= 1;
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  DBUG_RETURN(0);
}

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2907
/*
2908
  Fetch row data to bind buffers
2909 2910
*/

2911
static int stmt_fetch_row(MYSQL_STMT *stmt, uchar *row)
2912
{
2913
  MYSQL_BIND  *bind, *end;
2914
  MYSQL_FIELD *field, *field_end;
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  uchar *null_ptr, bit;
2916 2917 2918

  if (!row || !stmt->res_buffers)
    return 0;
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  null_ptr= row; 
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  row+= (stmt->field_count+9)/8;		/* skip null bits */
  bit= 4;					/* first 2 bits are reserved */
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  /* Copy complete row to application buffers */
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  for (bind= stmt->bind, end= (MYSQL_BIND *) bind + stmt->field_count, 
2926 2927
	 field= stmt->fields, 
	 field_end= (MYSQL_FIELD *)stmt->fields+stmt->field_count;
2928
       bind < end && field < field_end;
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       bind++, field++)
  {         
2931
    if (*null_ptr & bit)
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      *bind->is_null= bind->null_field= 1;
2933
    else
2934
    { 
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      *bind->is_null= bind->null_field= 0;
      bind->inter_buffer= row;
2937 2938
      if (field->type == bind->buffer_type)
        (*bind->fetch_result)(bind, &row);
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      else 
2940 2941 2942 2943
      {
        my_bool field_is_unsigned= (field->flags & UNSIGNED_FLAG) ? 1: 0;
        fetch_results(bind, field->type, &row, field_is_unsigned);
      }
2944
    }
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    if (!((bit<<=1) & 255))
2946
    {
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      bit= 1;					/* To next byte */
2948
      null_ptr++;
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    }
  }
  return 0;
}

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2955
/*
2956
  Fetch and return row data to bound buffers, if any
2957 2958
*/

2959
int STDCALL mysql_fetch(MYSQL_STMT *stmt)
2960
{
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  MYSQL *mysql= stmt->mysql;
2962
  uchar *row;
2963 2964
  DBUG_ENTER("mysql_fetch");

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  stmt->last_fetched_column= 0; /* reset */
2966
  if (stmt->result_buffered) /* buffered */
2967
  {
2968 2969
    MYSQL_RES *res;
    
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    if (!(res= stmt->result))
2971
      goto no_data;
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    if (!res->data_cursor) 
    {
2975
      stmt->current_row= 0;
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      goto no_data;
    }    
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    row= (uchar *)res->data_cursor->data;
    res->data_cursor= res->data_cursor->next;
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  }
2981 2982 2983 2984
  else /* un-buffered */
  {
    if (packet_error == net_safe_read(mysql))
    {
2985 2986
      set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
		      mysql->net.sqlstate);
2987 2988 2989 2990 2991
      DBUG_RETURN(1);
    }
    if (mysql->net.read_pos[0] == 254)
    {
      mysql->status= MYSQL_STATUS_READY;
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      stmt->current_row= 0;
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      goto no_data;
    }
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    row= mysql->net.read_pos+1;  
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  }  
  stmt->current_row= row;    
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  DBUG_RETURN(stmt_fetch_row(stmt, row));

no_data:
  DBUG_PRINT("info", ("end of data"));    
  DBUG_RETURN(MYSQL_NO_DATA); /* no more data */
}

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/*
  Fetch only specified column data to buffers
*/

int STDCALL mysql_fetch_column(MYSQL_STMT *stmt, MYSQL_BIND *bind, 
                               my_ulonglong icol, 
                               ulong offset)
{
  uchar   *row;
  my_bool null_data;

  DBUG_ENTER("mysql_fetch_column");

3019
  if (!(row= stmt->current_row))
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    goto no_data;

#ifdef CHECK_EXTRA_ARGUMENTS  
  if (!bind || icol >= stmt->field_count)
  {
3025 3026
    set_stmt_errmsg(stmt, "Invalid column descriptor or offset",1, 
                    unknown_sqlstate);
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    DBUG_RETURN(1);
  }
#endif

  /* column '0' == first column */
  if (stmt->res_buffers)
  {
    /* 
      Already buffers are parsed and cached to stmt->bind 
      during mysql_fetch() call.
    */
    MYSQL_BIND *param= stmt->bind+icol; 
    null_data= param->null_field;
    row= param->inter_buffer;
  }
  else
  { 
    if (stmt->last_fetched_column == icol+1)
    {
      /* 
        Data buffer is already parsed during the last call, get 
        the cached information 
      */
      if (!stmt->last_fetched_buffer)
        null_data= 1;
      else
      {
        null_data= 0;
        row= stmt->last_fetched_buffer;
      }
    }
    else
    {
      /* 
        Advance the data buffer to icol position and cache 
        the information for subsequent calls
      */
      uint bit= icol > 6 ? 1 : 4;
      stmt->last_fetched_column= icol+1;

      if (row[icol/8] & (bit << icol & 7))
      {
        stmt->last_fetched_buffer= 0;
        null_data= 1;
      }
      else
      {
        uint length, i;

        null_data= 0;
        row+= (stmt->field_count+9)/8;		/* skip null bits */
        
        for (i=0; i < icol; i++)
        {
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          if (!(length= default_binary_field_length((uint)(stmt->fields[i].
							   type))))
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            length= net_field_length(&row);
          row+= length;
        }
        stmt->last_fetched_buffer= row;
      }
    }
  }
  if (null_data)
  {
    if (bind->is_null)
      *bind->is_null= 1;
  }
  else
  {    
    MYSQL_FIELD *field= stmt->fields+icol; 
    my_bool field_is_unsigned= (field->flags & UNSIGNED_FLAG) ? 1: 0;
    
    bind->offset= offset;
    if (bind->is_null)
      *bind->is_null= 0;
    if (bind->length) /* Set the length if non char/binary types */
      *bind->length= default_binary_field_length(field->type);
    else
      bind->length= &param_length_is_dummy;
    fetch_results(bind, field->type, &row, field_is_unsigned);
  }
  DBUG_RETURN(0);

no_data:
  DBUG_PRINT("info", ("end of data"));    
  DBUG_RETURN(MYSQL_NO_DATA); /* no more data */
}


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/*
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  Read all rows of data from server  (binary format)
*/

static MYSQL_DATA *read_binary_rows(MYSQL_STMT *stmt)
{
  ulong      pkt_len;
  uchar      *cp;
  MYSQL      *mysql= stmt->mysql;
  MYSQL_DATA *result;
  MYSQL_ROWS *cur, **prev_ptr;
  NET        *net = &mysql->net;
  DBUG_ENTER("read_binary_rows");
 
  mysql= mysql->last_used_con;
  if ((pkt_len= net_safe_read(mysql)) == packet_error)
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  {
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    set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
		    mysql->net.sqlstate);

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    DBUG_RETURN(0);
  }
  if (mysql->net.read_pos[0] == 254) /* end of data */
    return 0;				

  if (!(result=(MYSQL_DATA*) my_malloc(sizeof(MYSQL_DATA),
				       MYF(MY_WME | MY_ZEROFILL))))
  {
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    set_stmt_errmsg(stmt, ER(CR_OUT_OF_MEMORY), CR_OUT_OF_MEMORY,
		    unknown_sqlstate);
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    DBUG_RETURN(0);
  }
  init_alloc_root(&result->alloc,8192,0);	/* Assume rowlength < 8192 */
  result->alloc.min_malloc= sizeof(MYSQL_ROWS);
  prev_ptr= &result->data;
  result->rows= 0;

  while (*(cp=net->read_pos) != 254 || pkt_len >= 8)
  {
    result->rows++;

    if (!(cur= (MYSQL_ROWS*) alloc_root(&result->alloc,sizeof(MYSQL_ROWS))) ||
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	!(cur->data= ((MYSQL_ROW) alloc_root(&result->alloc, pkt_len))))
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    {
      free_rows(result);
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      set_stmt_errmsg(stmt, ER(CR_OUT_OF_MEMORY), CR_OUT_OF_MEMORY,
		      unknown_sqlstate);
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      DBUG_RETURN(0);
    }
    *prev_ptr= cur;
    prev_ptr= &cur->next;
    memcpy(cur->data, (char*)cp+1, pkt_len-1); 
	  
    if ((pkt_len=net_safe_read(mysql)) == packet_error)
    {
      free_rows(result);
      DBUG_RETURN(0);
    }
  }
  *prev_ptr= 0;
  if (pkt_len > 1)
  {
    mysql->warning_count= uint2korr(cp+1);
    DBUG_PRINT("info",("warning_count:  %ld", mysql->warning_count));
  }
  DBUG_PRINT("exit",("Got %d rows",result->rows));
  DBUG_RETURN(result);
}

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/*
  Store or buffer the binary results to stmt
*/

int STDCALL mysql_stmt_store_result(MYSQL_STMT *stmt)
{
  MYSQL *mysql= stmt->mysql;
  MYSQL_RES *result;
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  DBUG_ENTER("mysql_stmt_store_result");
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  mysql= mysql->last_used_con;

  if (!stmt->field_count)
    DBUG_RETURN(0);
  if (mysql->status != MYSQL_STATUS_GET_RESULT)
  {
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    set_stmt_error(stmt, CR_COMMANDS_OUT_OF_SYNC, unknown_sqlstate);
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    DBUG_RETURN(1);
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  }
  mysql->status= MYSQL_STATUS_READY;		/* server is ready */
  if (!(result= (MYSQL_RES*) my_malloc((uint) (sizeof(MYSQL_RES)+
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					       sizeof(ulong) *
					       stmt->field_count),
				       MYF(MY_WME | MY_ZEROFILL))))
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  {
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    set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
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    DBUG_RETURN(1);
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  }
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  result->methods= mysql->methods;
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  stmt->result_buffered= 1;
  if (!(result->data= read_binary_rows(stmt)))
  {
    my_free((gptr) result,MYF(0));
    DBUG_RETURN(0);
  }
  mysql->affected_rows= result->row_count= result->data->rows;
  result->data_cursor=	result->data->data;
  result->fields=	stmt->fields;
  result->field_count=	stmt->field_count;
  stmt->result= result;
  DBUG_RETURN(0); /* Data buffered, must be fetched with mysql_fetch() */
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}

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/*
  Seek to desired row in the statement result set
*/

MYSQL_ROW_OFFSET STDCALL
mysql_stmt_row_seek(MYSQL_STMT *stmt, MYSQL_ROW_OFFSET row)
{
  MYSQL_RES *result;
  DBUG_ENTER("mysql_stmt_row_seek");
  
  if ((result= stmt->result))
  {
    MYSQL_ROW_OFFSET return_value= result->data_cursor;
    result->current_row= 0;
    result->data_cursor= row;
    DBUG_RETURN(return_value);
  }
  
  DBUG_PRINT("exit", ("stmt doesn't contain any resultset"));
  DBUG_RETURN(0);
}

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/*
  Return the current statement row cursor position
*/

MYSQL_ROW_OFFSET STDCALL 
mysql_stmt_row_tell(MYSQL_STMT *stmt)
{
  DBUG_ENTER("mysql_stmt_row_tell");
  
  if (stmt->result)
    DBUG_RETURN(stmt->result->data_cursor);
  
  DBUG_PRINT("exit", ("stmt doesn't contain any resultset"));
  DBUG_RETURN(0);
}

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/*
  Move the stmt result set data cursor to specified row
*/

void STDCALL
mysql_stmt_data_seek(MYSQL_STMT *stmt, my_ulonglong row)
{
  MYSQL_RES   *result;
  DBUG_ENTER("mysql_stmt_data_seek");
  DBUG_PRINT("enter",("row id to seek: %ld",(long) row));
  
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  if ((result= stmt->result))
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  {
    MYSQL_ROWS	*tmp= 0;
    if (result->data)
      for (tmp=result->data->data; row-- && tmp ; tmp = tmp->next) ;
    result->current_row= 0;
    result->data_cursor= tmp;
  }
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  else
    DBUG_PRINT("exit", ("stmt doesn't contain any resultset"));
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  DBUG_VOID_RETURN;
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}

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/*
  Return total rows the current statement result set
*/

my_ulonglong STDCALL mysql_stmt_num_rows(MYSQL_STMT *stmt)
{
  DBUG_ENTER("mysql_stmt_num_rows");
    
  if (stmt->result)
    DBUG_RETURN(stmt->result->row_count);
  
  DBUG_PRINT("exit", ("stmt doesn't contain any resultset"));
  DBUG_RETURN(0);
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}
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/********************************************************************
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 statement error handling and close
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*********************************************************************/
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/*
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  Close the statement handle by freeing all alloced resources
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  SYNOPSIS
    mysql_stmt_close()
    stmt	       Statement handle
    skip_list    Flag to indicate delete from list or not
  RETURN VALUES
    0	ok
    1	error
*/
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my_bool STDCALL mysql_stmt_free_result(MYSQL_STMT *stmt)
{ 
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  MYSQL *mysql;
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  DBUG_ENTER("mysql_stmt_close");

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  DBUG_ASSERT(stmt != 0);
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  mysql= stmt->mysql;
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  if (mysql->status != MYSQL_STATUS_READY)
  {
    /* Clear the current execution status */
    DBUG_PRINT("warning",("Not all packets read, clearing them"));
    for (;;)
    {
      ulong pkt_len;
      if ((pkt_len= net_safe_read(mysql)) == packet_error)
        break;
      if (pkt_len <= 8 && mysql->net.read_pos[0] == 254)
        break;	
    }
    mysql->status= MYSQL_STATUS_READY;
  }
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  mysql_free_result(stmt->result);
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  stmt->result= 0;
  stmt->result_buffered= 0;
  stmt->current_row= 0;
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  DBUG_RETURN(0);
}

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my_bool stmt_close(MYSQL_STMT *stmt, my_bool skip_list)
{
  MYSQL *mysql;
  DBUG_ENTER("mysql_stmt_close");

  DBUG_ASSERT(stmt != 0);
  
  if (!(mysql= stmt->mysql))
  {
    my_free((gptr) stmt, MYF(MY_WME));
    DBUG_RETURN(0);
  }
  mysql_stmt_free_result(stmt);
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  if (stmt->state == MY_ST_PREPARE || stmt->state == MY_ST_EXECUTE)
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  {
    char buff[4];
    int4store(buff, stmt->stmt_id);
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    if (simple_command(mysql, COM_CLOSE_STMT, buff, 4, 1))
    {
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      set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
		      mysql->net.sqlstate);
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      stmt->mysql= NULL; /* connection isn't valid anymore */
      DBUG_RETURN(1);
    }
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  }
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  stmt->field_count= 0;
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  free_root(&stmt->mem_root, MYF(0));
  if (!skip_list)
    mysql->stmts= list_delete(mysql->stmts, &stmt->list);
  mysql->status= MYSQL_STATUS_READY;
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  my_free((gptr) stmt->query, MYF(MY_WME));
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  my_free((gptr) stmt, MYF(MY_WME));
  DBUG_RETURN(0);
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}

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my_bool STDCALL mysql_stmt_close(MYSQL_STMT *stmt)
{
  return stmt_close(stmt, 0);
}

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/*
  Reset the statement buffers in server
*/

my_bool STDCALL mysql_stmt_reset(MYSQL_STMT *stmt)
{
  char buff[MYSQL_STMT_HEADER];
  MYSQL *mysql;
  DBUG_ENTER("mysql_stmt_reset");
  DBUG_ASSERT(stmt != 0);
  
  mysql= stmt->mysql->last_used_con;
  int4store(buff, stmt->stmt_id);		/* Send stmt id to server */
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  if ((*mysql->methods->advanced_command)(mysql, COM_RESET_STMT,buff,MYSQL_STMT_HEADER,0,0,1))
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  {
    set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno, 
                    mysql->net.sqlstate);
    DBUG_RETURN(1);
  }
  DBUG_RETURN(0);
}

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/*
  Return statement error code
*/

uint STDCALL mysql_stmt_errno(MYSQL_STMT * stmt)
{
  DBUG_ENTER("mysql_stmt_errno");
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  DBUG_RETURN(stmt->last_errno);
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}

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const char *STDCALL mysql_stmt_sqlstate(MYSQL_STMT * stmt)
{
  DBUG_ENTER("mysql_stmt_sqlstate");
  DBUG_RETURN(stmt->sqlstate);
}

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/*
  Return statement error message
*/

const char *STDCALL mysql_stmt_error(MYSQL_STMT * stmt)
{
  DBUG_ENTER("mysql_stmt_error");
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  DBUG_RETURN(stmt->last_error);
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}

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/********************************************************************
 Transactional APIs
*********************************************************************/

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/*
  Commit the current transaction
*/

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my_bool STDCALL mysql_commit(MYSQL * mysql)
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{
  DBUG_ENTER("mysql_commit");
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  DBUG_RETURN((my_bool) mysql_real_query(mysql, "commit", 6));
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}

/*
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  Rollback the current transaction
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*/

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my_bool STDCALL mysql_rollback(MYSQL * mysql)
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{
  DBUG_ENTER("mysql_rollback");
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  DBUG_RETURN((my_bool) mysql_real_query(mysql, "rollback", 8));
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}


/*
  Set autocommit to either true or false
*/

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my_bool STDCALL mysql_autocommit(MYSQL * mysql, my_bool auto_mode)
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{
  DBUG_ENTER("mysql_autocommit");
  DBUG_PRINT("enter", ("mode : %d", auto_mode));

  if (auto_mode) /* set to true */
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    DBUG_RETURN((my_bool) mysql_real_query(mysql, "set autocommit=1", 16));
  DBUG_RETURN((my_bool) mysql_real_query(mysql, "set autocommit=0", 16));
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}
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/********************************************************************
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 Multi query execution + SPs APIs
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*********************************************************************/

/*
  Returns if there are any more query results exists to be read using 
  mysql_next_result()
*/

my_bool STDCALL mysql_more_results(MYSQL *mysql)
{
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  my_bool res;
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  DBUG_ENTER("mysql_more_results");
  
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  res= ((mysql->last_used_con->server_status & SERVER_MORE_RESULTS_EXISTS) ? 
	1: 0);
  DBUG_PRINT("exit",("More results exists ? %d", res)); 
  DBUG_RETURN(res);
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}

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/*
  Reads and returns the next query results
*/

my_bool STDCALL mysql_next_result(MYSQL *mysql)
{
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  DBUG_ENTER("mysql_next_result");
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  mysql->net.last_error[0]= 0;
  mysql->net.last_errno= 0;
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  strmov(mysql->net.sqlstate, not_error_sqlstate);
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  mysql->affected_rows= ~(my_ulonglong) 0;

  if (mysql->last_used_con->server_status & SERVER_MORE_RESULTS_EXISTS)
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    DBUG_RETURN(mysql_read_query_result(mysql));
  
  DBUG_RETURN(0);
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}