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Viewing changes to drizzled/function/time/make_datetime.cc

  • Committer: Brian Aker
  • Date: 2009-02-21 00:18:15 UTC
  • Revision ID: brian@tangent.org-20090221001815-x20e8h71e984lvs1
Completion (?) of uint conversion.

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drizzled/function/time/make_datetime.cc
 
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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
 
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 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
 
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 *
 
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 *  Copyright (C) 2008 Sun Microsystems
 
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 *
 
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 *  This program is free software; you can redistribute it and/or modify
 
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 *  it under the terms of the GNU General Public License as published by
 
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 *  the Free Software Foundation; version 2 of the License.
 
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 *
 
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 *  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
 
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 *  GNU General Public License for more details.
 
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 *
 
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 *  You should have received a copy of the GNU General Public License
 
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 *  along with this program; if not, write to the Free Software
 
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
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 */
 
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#include <drizzled/server_includes.h>
 
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#include CSTDINT_H
 
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#include <drizzled/function/time/make_datetime.h>
 
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/**
 
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  @todo
 
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  OPTIMIZATION
 
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  - Replace the switch with a function that should be called for each
 
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  date type.
 
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  - Remove sprintf and opencode the conversion, like we do in
 
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  Field_datetime.
 
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  The reason for this functions existence is that as we don't have a
 
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  way to know if a datetime/time value has microseconds in them
 
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  we are now only adding microseconds to the output if the
 
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  value has microseconds.
 
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  We can't use a standard make_date_time() for this as we don't know
 
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  if someone will use %f in the format specifier in which case we would get
 
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  the microseconds twice.
 
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*/
 
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bool make_datetime(date_time_format_types format, DRIZZLE_TIME *ltime,
 
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                          String *str)
 
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{
 
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  char *buff;
 
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  const CHARSET_INFO * const cs= &my_charset_bin;
 
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  uint32_t length= MAX_DATE_STRING_REP_LENGTH;
 
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  if (str->alloc(length))
 
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    return 1;
 
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  buff= (char*) str->ptr();
 
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  switch (format) {
 
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  case TIME_ONLY:
 
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    length= cs->cset->snprintf(cs, buff, length, "%s%02d:%02d:%02d",
 
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                               ltime->neg ? "-" : "",
 
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                               ltime->hour, ltime->minute, ltime->second);
 
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    break;
 
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  case TIME_MICROSECOND:
 
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    length= cs->cset->snprintf(cs, buff, length, "%s%02d:%02d:%02d.%06ld",
 
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                               ltime->neg ? "-" : "",
 
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                               ltime->hour, ltime->minute, ltime->second,
 
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                               ltime->second_part);
 
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    break;
 
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  case DATE_ONLY:
 
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    length= cs->cset->snprintf(cs, buff, length, "%04d-%02d-%02d",
 
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                               ltime->year, ltime->month, ltime->day);
 
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    break;
 
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  case DATE_TIME:
 
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    length= cs->cset->snprintf(cs, buff, length,
 
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                               "%04d-%02d-%02d %02d:%02d:%02d",
 
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                               ltime->year, ltime->month, ltime->day,
 
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                               ltime->hour, ltime->minute, ltime->second);
 
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    break;
 
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  case DATE_TIME_MICROSECOND:
 
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    length= cs->cset->snprintf(cs, buff, length,
 
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                               "%04d-%02d-%02d %02d:%02d:%02d.%06ld",
 
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                               ltime->year, ltime->month, ltime->day,
 
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                               ltime->hour, ltime->minute, ltime->second,
 
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                               ltime->second_part);
 
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    break;
 
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  }
 
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  str->length(length);
 
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  str->set_charset(cs);
 
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  return 0;
 
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}
 
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