~drizzle-trunk/drizzle/development

/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-

 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:

 *

 *  Copyright (C) 2008 MySQL

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation; either version 2 of the License, or

 *  (at your option) any later version.

 *

 *  This program is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *  GNU General Public License for more details.

 *

 *  You should have received a copy of the GNU General Public License

 *  along with this program; if not, write to the Free Software

 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 */

#ifdef USE_PRAGMA_IMPLEMENTATION

#pragma implementation				// gcc: Class implementation

#endif

#include <drizzled/field/long.h>

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

** long int

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

int Field_long::store(const char *from,uint len,CHARSET_INFO *cs)

{

  long store_tmp;

  int error;

  int64_t rnd;

  error= get_int(cs, from, len, &rnd, UINT32_MAX, INT32_MIN, INT32_MAX);

  store_tmp= unsigned_flag ? (long) (uint64_t) rnd : (long) rnd;

#ifdef WORDS_BIGENDIAN

  if (table->s->db_low_byte_first)

  {

    int4store(ptr, store_tmp);

  }

  else

#endif

    longstore(ptr, store_tmp);

  return error;

}

int Field_long::store(double nr)

{

  int error= 0;

  int32_t res;

  nr=rint(nr);

  if (unsigned_flag)

  {

    if (nr < 0)

    {

      res=0;

      error= 1;

    }

    else if (nr > (double) UINT32_MAX)

    {

      res= INT32_MAX;

      set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);

      error= 1;

    }

    else

      res=(int32_t) (ulong) nr;

  }

  else

  {

    if (nr < (double) INT32_MIN)

    {

      res=(int32_t) INT32_MIN;

      error= 1;

    }

    else if (nr > (double) INT32_MAX)

    {

      res=(int32_t) INT32_MAX;

      error= 1;

    }

    else

      res=(int32_t) (int64_t) nr;

  }

  if (error)

    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);

#ifdef WORDS_BIGENDIAN

  if (table->s->db_low_byte_first)

  {

    int4store(ptr,res);

  }

  else

#endif

    longstore(ptr,res);

  return error;

}

int Field_long::store(int64_t nr, bool unsigned_val)

{

  int error= 0;

  int32_t res;

  if (unsigned_flag)

  {

    if (nr < 0 && !unsigned_val)

    {

      res=0;

      error= 1;

    }

    else if ((uint64_t) nr >= (1LL << 32))

    {

      res=(int32_t) (uint32_t) ~0L;

      error= 1;

    }

    else

      res=(int32_t) (uint32_t) nr;

  }

  else

  {

    if (nr < 0 && unsigned_val)

      nr= ((int64_t) INT32_MAX) + 1;           // Generate overflow

    if (nr < (int64_t) INT32_MIN) 

    {

      res=(int32_t) INT32_MIN;

      error= 1;

    }

    else if (nr > (int64_t) INT32_MAX)

    {

      res=(int32_t) INT32_MAX;

      error= 1;

    }

    else

      res=(int32_t) nr;

  }

  if (error)

    set_warning(MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_DATA_OUT_OF_RANGE, 1);

#ifdef WORDS_BIGENDIAN

  if (table->s->db_low_byte_first)

  {

    int4store(ptr,res);

  }

  else

#endif

    longstore(ptr,res);

  return error;

}

double Field_long::val_real(void)

{

  int32_t j;

#ifdef WORDS_BIGENDIAN

  if (table->s->db_low_byte_first)

    j=sint4korr(ptr);

  else

#endif

    longget(j,ptr);

  return unsigned_flag ? (double) (uint32_t) j : (double) j;

}

int64_t Field_long::val_int(void)

{

  int32_t j;

  /* See the comment in Field_long::store(long long) */

  assert(table->in_use == current_thd);

#ifdef WORDS_BIGENDIAN

  if (table->s->db_low_byte_first)

    j=sint4korr(ptr);

  else

#endif

    longget(j,ptr);

  return unsigned_flag ? (int64_t) (uint32_t) j : (int64_t) j;

}

String *Field_long::val_str(String *val_buffer,

			    String *val_ptr __attribute__((unused)))

{

  CHARSET_INFO *cs= &my_charset_bin;

  uint length;

  uint mlength=max(field_length+1,12*cs->mbmaxlen);

  val_buffer->alloc(mlength);

  char *to=(char*) val_buffer->ptr();

  int32_t j;

#ifdef WORDS_BIGENDIAN

  if (table->s->db_low_byte_first)

    j=sint4korr(ptr);

  else

#endif

    longget(j,ptr);

  if (unsigned_flag)

    length=cs->cset->long10_to_str(cs,to,mlength, 10,(long) (uint32_t)j);

  else

    length=cs->cset->long10_to_str(cs,to,mlength,-10,(long) j);

  val_buffer->length(length);

  if (zerofill)

    prepend_zeros(val_buffer);

  return val_buffer;

}

bool Field_long::send_binary(Protocol *protocol)

{

  return protocol->store_long(Field_long::val_int());

}

int Field_long::cmp(const uchar *a_ptr, const uchar *b_ptr)

{

  int32_t a,b;

#ifdef WORDS_BIGENDIAN

  if (table->s->db_low_byte_first)

  {

    a=sint4korr(a_ptr);

    b=sint4korr(b_ptr);

  }

  else

#endif

  {

    longget(a,a_ptr);

    longget(b,b_ptr);

  }

  if (unsigned_flag)

    return ((uint32_t) a < (uint32_t) b) ? -1 : ((uint32_t) a > (uint32_t) b) ? 1 : 0;

  return (a < b) ? -1 : (a > b) ? 1 : 0;

}

void Field_long::sort_string(uchar *to,uint length __attribute__((unused)))

{

#ifdef WORDS_BIGENDIAN

  if (!table->s->db_low_byte_first)

  {

    if (unsigned_flag)

      to[0] = ptr[0];

    else

      to[0] = (char) (ptr[0] ^ 128);		/* Revers signbit */

    to[1]   = ptr[1];

    to[2]   = ptr[2];

    to[3]   = ptr[3];

  }

  else

#endif

  {

    if (unsigned_flag)

      to[0] = ptr[3];

    else

      to[0] = (char) (ptr[3] ^ 128);		/* Revers signbit */

    to[1]   = ptr[2];

    to[2]   = ptr[1];

    to[3]   = ptr[0];

  }

}

void Field_long::sql_type(String &res) const

{

  CHARSET_INFO *cs=res.charset();

  res.length(cs->cset->snprintf(cs,(char*) res.ptr(),res.alloced_length(),

			  "int(%d)",(int) field_length));

  add_zerofill_and_unsigned(res);

}