m_string.h

/* Copyright (C) 2000 MySQL AB

   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; version 2 of the License.

   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 */

/* There may be prolems include all of theese. Try to test in
   configure with ones are needed? */

#pragma once

#include <strings.h>
#include <cstring>
#include <cstdlib>
#include <cstddef>
#include <cassert>
#include <climits>
#include <cctype>

#include <drizzled/visibility.h>

namespace drizzled {
namespace internal {

extern void bmove_upp(unsigned char *dst,const unsigned char *src,size_t len);

/* Conversion routines */
enum my_gcvt_arg_type
{
  MY_GCVT_ARG_FLOAT,
  MY_GCVT_ARG_DOUBLE
};

DRIZZLED_API double my_strtod(const char *str, char **end, int *error);
DRIZZLED_API double my_atof(const char *nptr);
DRIZZLED_API size_t my_fcvt(double x, int precision, char *to, bool *error);
DRIZZLED_API size_t my_gcvt(double x, my_gcvt_arg_type type, int width, char *to, bool *error);

#define NOT_FIXED_DEC (uint8_t)31

/*
  The longest string my_fcvt can return is 311 + "precision" bytes.
  Here we assume that we never cal my_fcvt() with precision >= NOT_FIXED_DEC
  (+ 1 byte for the terminating '\0').
*/
#define FLOATING_POINT_BUFFER (311 + NOT_FIXED_DEC)

/*
  We want to use the 'e' format in some cases even if we have enough space
  for the 'f' one just to mimic sprintf("%.15g") behavior for large integers,
  and to improve it for numbers < 10^(-4).
  That is, for |x| < 1 we require |x| >= 10^(-15), and for |x| > 1 we require
  it to be integer and be <= 10^DBL_DIG for the 'f' format to be used.
  We don't lose precision, but make cases like "1e200" or "0.00001" look nicer.
*/
#define MAX_DECPT_FOR_F_FORMAT DBL_DIG

extern char *llstr(int64_t value,char *buff);
extern char *ullstr(int64_t value,char *buff);

extern char *int2str(int32_t val, char *dst, int radix, int upcase);
extern char *int10_to_str(int32_t val,char *dst,int radix);
DRIZZLED_API int64_t my_strtoll10(const char *nptr, char **endptr, int *error);
DRIZZLED_API char *int64_t2str(int64_t val,char *dst,int radix);
DRIZZLED_API char *int64_t10_to_str(int64_t val,char *dst,int radix);


static inline const unsigned char *
skip_trailing_space(const unsigned char *ptr, size_t len)
{
  const unsigned char *end= ptr + len;

  while (end > ptr && isspace(*--end))
    continue;
  return end+1;
}

} /* namespace internal */
} /* namespace drizzled */