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  • Committer: Monty Taylor
  • Date: 2008-10-16 06:32:59 UTC
  • mfrom: (518 drizzle)
  • mto: (511.1.5 codestyle)
  • mto: This revision was merged to the branch mainline in revision 521.
  • Revision ID: monty@inaugust.com-20081016063259-fwbqogq7lnezct0l
Merged with trunk.

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drizzled/field/double.cc
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 */
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#include <config.h>
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#include <float.h>
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#include <math.h>
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#include <algorithm>
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#include <drizzled/server_includes.h>
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#include <drizzled/field/double.h>
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#include <drizzled/error.h>
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#include <drizzled/table.h>
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#include <drizzled/session.h>
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#include <drizzled/current_session.h>
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#include <drizzled/internal/m_string.h>
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using namespace std;
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namespace drizzled
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{
 
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#include <drizzled/drizzled_error_messages.h>
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/****************************************************************************
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  double precision floating point numbers
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  int error;
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  char *end;
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  double nr= my_strntod(cs,(char*) from, len, &end, &error);
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  ASSERT_COLUMN_MARKED_FOR_WRITE;
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  if (error || (!len || (((uint32_t) (end-from) != len) && getTable()->in_use->count_cuted_fields)))
 
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  if (error || (!len || (((uint) (end-from) != len) && table->in_use->count_cuted_fields)))
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  {
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    set_warning(DRIZZLE_ERROR::WARN_LEVEL_WARN,
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                (error ? ER_WARN_DATA_OUT_OF_RANGE : ER_WARN_DATA_TRUNCATED), 1);
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{
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  int error= truncate(&nr, DBL_MAX);
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  ASSERT_COLUMN_MARKED_FOR_WRITE;
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#ifdef WORDS_BIGENDIAN
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  if (getTable()->getShare()->db_low_byte_first)
 
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  if (table->s->db_low_byte_first)
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  {
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    float8store(ptr,nr);
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  }
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                             (double) nr);
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}
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double Field_double::val_real(void) const
 
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double Field_double::val_real(void)
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{
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  double j;
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  ASSERT_COLUMN_MARKED_FOR_READ;
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#ifdef WORDS_BIGENDIAN
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  if (getTable()->getShare()->db_low_byte_first)
 
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  if (table->s->db_low_byte_first)
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  {
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    float8get(j,ptr);
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  }
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  return j;
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}
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int64_t Field_double::val_int(void) const
 
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int64_t Field_double::val_int(void)
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{
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  double j;
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  int64_t res;
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  ASSERT_COLUMN_MARKED_FOR_READ;
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#ifdef WORDS_BIGENDIAN
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  if (getTable()->getShare()->db_low_byte_first)
 
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  if (table->s->db_low_byte_first)
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  {
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    float8get(j,ptr);
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  }
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  {
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    char buf[DOUBLE_TO_STRING_CONVERSION_BUFFER_SIZE];
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    String tmp(buf, sizeof(buf), &my_charset_utf8_general_ci), *str;
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    str= val_str(&tmp, &tmp);
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    Session *session= getTable() ? getTable()->in_use : current_session;
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    push_warning_printf(session, DRIZZLE_ERROR::WARN_LEVEL_WARN,
 
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    str= val_str(&tmp, 0);
 
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    push_warning_printf(current_thd, DRIZZLE_ERROR::WARN_LEVEL_WARN,
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                        ER_TRUNCATED_WRONG_VALUE,
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                        ER(ER_TRUNCATED_WRONG_VALUE), "INTEGER",
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                        str->c_ptr());
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}
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String *Field_double::val_str(String *val_buffer, String *) const
 
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String *Field_double::val_str(String *val_buffer,
 
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                              String *val_ptr __attribute__((unused)))
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{
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  double nr;
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  ASSERT_COLUMN_MARKED_FOR_READ;
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#ifdef WORDS_BIGENDIAN
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  if (getTable()->getShare()->db_low_byte_first)
 
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  if (table->s->db_low_byte_first)
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  {
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    float8get(nr,ptr);
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  }
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#endif
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    doubleget(nr,ptr);
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  uint32_t to_length= max(field_length, (uint32_t)DOUBLE_TO_STRING_CONVERSION_BUFFER_SIZE);
 
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  uint32_t to_length=cmax(field_length, (uint32_t)DOUBLE_TO_STRING_CONVERSION_BUFFER_SIZE);
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  val_buffer->alloc(to_length);
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  char *to=(char*) val_buffer->ptr();
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  size_t len;
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  if (dec >= NOT_FIXED_DEC)
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    len= internal::my_gcvt(nr, internal::MY_GCVT_ARG_DOUBLE, to_length - 1, to, NULL);
 
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    len= my_gcvt(nr, MY_GCVT_ARG_DOUBLE, to_length - 1, to, NULL);
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  else
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    len= internal::my_fcvt(nr, dec, to, NULL);
 
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    len= my_fcvt(nr, dec, to, NULL);
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  val_buffer->length((uint32_t) len);
 
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  val_buffer->length((uint) len);
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  return val_buffer;
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}
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bool Field_double::send_binary(Protocol *protocol)
 
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{
 
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  return protocol->store((double) Field_double::val_real(), dec, (String*) 0);
 
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}
 
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int Field_double::cmp(const unsigned char *a_ptr, const unsigned char *b_ptr)
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{
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  double a,b;
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#ifdef WORDS_BIGENDIAN
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  if (getTable()->getShare()->db_low_byte_first)
 
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  if (table->s->db_low_byte_first)
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  {
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    float8get(a,a_ptr);
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    float8get(b,b_ptr);
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}
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#define DBL_EXP_DIG (sizeof(double)*8-DBL_MANT_DIG)
 
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/* The following should work for IEEE */
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void Field_double::sort_string(unsigned char *to,uint32_t )
 
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void Field_double::sort_string(unsigned char *to,uint32_t length __attribute__((unused)))
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{
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  double nr;
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#ifdef WORDS_BIGENDIAN
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  if (getTable()->getShare()->db_low_byte_first)
 
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  if (table->s->db_low_byte_first)
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  {
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    float8get(nr,ptr);
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  }
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}
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/**
 
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   Save the field metadata for double fields.
 
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   Saves the pack length in the first byte of the field metadata array
 
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   at index of *metadata_ptr.
 
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   @param   metadata_ptr   First byte of field metadata
 
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   @returns number of bytes written to metadata_ptr
 
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*/
 
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int Field_double::do_save_field_metadata(unsigned char *metadata_ptr)
 
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{
 
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  *metadata_ptr= pack_length();
 
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  return 1;
 
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}
 
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void Field_double::sql_type(String &res) const
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{
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  const CHARSET_INFO * const cs=res.charset();
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  }
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}
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} /* namespace drizzled */