~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/int64_t.h>

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

 Field type int64_t int (8 bytes)

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

int Field_int64_t::store(const char *from,uint len,CHARSET_INFO *cs)

{

  int error= 0;

  char *end;

  uint64_t tmp;

  tmp= cs->cset->strntoull10rnd(cs,from,len,unsigned_flag,&end,&error);

  if (error == MY_ERRNO_ERANGE)

  {

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

    error= 1;

  }

  else if (table->in_use->count_cuted_fields && 

           check_int(cs, from, len, end, error))

    error= 1;

  else

    error= 0;

#ifdef WORDS_BIGENDIAN

  if (table->s->db_low_byte_first)

  {

    int8store(ptr,tmp);

  }

  else

#endif

    int64_tstore(ptr,tmp);

  return error;

}

int Field_int64_t::store(double nr)

{

  int error= 0;

  int64_t res;

  nr= rint(nr);

  if (unsigned_flag)

  {

    if (nr < 0)

    {

      res=0;

      error= 1;

    }

    else if (nr >= (double) UINT64_MAX)

    {

      res= ~(int64_t) 0;

      error= 1;

    }

    else

      res=(int64_t) (uint64_t) nr;

  }

  else

  {

    if (nr <= (double) INT64_MIN)

    {

      res= INT64_MIN;

      error= (nr < (double) INT64_MIN);

    }

    else if (nr >= (double) (uint64_t) INT64_MAX)

    {

      res= INT64_MAX;

      error= (nr > (double) INT64_MAX);

    }

    else

      res=(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)

  {

    int8store(ptr,res);

  }

  else

#endif

    int64_tstore(ptr,res);

  return error;

}

int Field_int64_t::store(int64_t nr, bool unsigned_val)

{

  int error= 0;

  if (nr < 0)                                   // Only possible error

  {

    /*

      if field is unsigned and value is signed (< 0) or

      if field is signed and value is unsigned we have an overflow

    */

    if (unsigned_flag != unsigned_val)

    {

      nr= unsigned_flag ? (uint64_t) 0 : (uint64_t) INT64_MAX;

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

      error= 1;

    }

  }

#ifdef WORDS_BIGENDIAN

  if (table->s->db_low_byte_first)

  {

    int8store(ptr,nr);

  }

  else

#endif

    int64_tstore(ptr,nr);

  return error;

}

double Field_int64_t::val_real(void)

{

  int64_t j;

#ifdef WORDS_BIGENDIAN

  if (table->s->db_low_byte_first)

  {

    j=sint8korr(ptr);

  }

  else

#endif

    int64_tget(j,ptr);

  /* The following is open coded to avoid a bug in gcc 3.3 */

  if (unsigned_flag)

  {

    uint64_t tmp= (uint64_t) j;

    return uint64_t2double(tmp);

  }

  return (double) j;

}

int64_t Field_int64_t::val_int(void)

{

  int64_t j;

#ifdef WORDS_BIGENDIAN

  if (table->s->db_low_byte_first)

    j=sint8korr(ptr);

  else

#endif

    int64_tget(j,ptr);

  return j;

}

String *Field_int64_t::val_str(String *val_buffer,

				String *val_ptr __attribute__((unused)))

{

  CHARSET_INFO *cs= &my_charset_bin;

  uint length;

  uint mlength=max(field_length+1,22*cs->mbmaxlen);

  val_buffer->alloc(mlength);

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

  int64_t j;

#ifdef WORDS_BIGENDIAN

  if (table->s->db_low_byte_first)

    j=sint8korr(ptr);

  else

#endif

    int64_tget(j,ptr);

  length=(uint) (cs->cset->int64_t10_to_str)(cs,to,mlength,

					unsigned_flag ? 10 : -10, j);

  val_buffer->length(length);

  if (zerofill)

    prepend_zeros(val_buffer);

  return val_buffer;

}

bool Field_int64_t::send_binary(Protocol *protocol)

{

  return protocol->store_int64_t(Field_int64_t::val_int(), unsigned_flag);

}

int Field_int64_t::cmp(const uchar *a_ptr, const uchar *b_ptr)

{

  int64_t a,b;

#ifdef WORDS_BIGENDIAN

  if (table->s->db_low_byte_first)

  {

    a=sint8korr(a_ptr);

    b=sint8korr(b_ptr);

  }

  else

#endif

  {

    int64_tget(a,a_ptr);

    int64_tget(b,b_ptr);

  }

  if (unsigned_flag)

    return ((uint64_t) a < (uint64_t) b) ? -1 :

    ((uint64_t) a > (uint64_t) b) ? 1 : 0;

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

}

void Field_int64_t::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];

    to[4]   = ptr[4];

    to[5]   = ptr[5];

    to[6]   = ptr[6];

    to[7]   = ptr[7];

  }

  else

#endif

  {

    if (unsigned_flag)

      to[0] = ptr[7];

    else

      to[0] = (char) (ptr[7] ^ 128);		/* Revers signbit */

    to[1]   = ptr[6];

    to[2]   = ptr[5];

    to[3]   = ptr[4];

    to[4]   = ptr[3];

    to[5]   = ptr[2];

    to[6]   = ptr[1];

    to[7]   = ptr[0];

  }

}

void Field_int64_t::sql_type(String &res) const

{

  CHARSET_INFO *cs=res.charset();

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

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

  add_zerofill_and_unsigned(res);

}

/*

  Floating-point numbers

 */

uchar *

Field_real::pack(uchar *to, const uchar *from,

                 uint max_length, bool low_byte_first)

{

  assert(max_length >= pack_length());

#ifdef WORDS_BIGENDIAN

  if (low_byte_first != table->s->db_low_byte_first)

  {

    const uchar *dptr= from + pack_length();

    while (dptr-- > from)

      *to++ = *dptr;

    return(to);

  }

  else

#endif

    return(Field::pack(to, from, max_length, low_byte_first));

}

const uchar *

Field_real::unpack(uchar *to, const uchar *from,

                   uint param_data, bool low_byte_first)

{

#ifdef WORDS_BIGENDIAN

  if (low_byte_first != table->s->db_low_byte_first)

  {

    const uchar *dptr= from + pack_length();

    while (dptr-- > from)

      *to++ = *dptr;

    return(from + pack_length());

  }

  else

#endif

    return(Field::unpack(to, from, param_data, low_byte_first));

}