SqMod/module/Vendor/MDBC/libmariadb/strtoll.c

/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
   
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
   
   This library 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
   Library General Public License for more details.
   
   You should have received a copy of the GNU Library General Public
   License along with this library; if not, write to the Free
   Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   MA 02111-1301, USA */

/* This is defines strtoll() if neaded */

#include <my_global.h>
#include <m_string.h>
#if !defined(HAVE_STRTOLL) && defined(HAVE_LONG_LONG)
#define USE_LONGLONG

#define strtoll glob_strtoll		/* Fix for True64 */

#include "m_string.h"
#include "m_ctype.h"
#include "my_sys.h"			/* defines errno */
#include <errno.h>

#undef strtoull
#undef strtoll
#undef strtoul
#undef strtol
#ifdef USE_LONGLONG
#define UTYPE_MAX (~(ulonglong) 0)
#define TYPE_MIN LONGLONG_MIN
#define TYPE_MAX LONGLONG_MAX
#define longtype longlong
#define ulongtype ulonglong
#ifdef USE_UNSIGNED
#define function ulongtype strtoull
#else
#define function longtype strtoll
#endif
#else
#define UTYPE_MAX (ulong) ~0L
#define TYPE_MIN LONG_MIN
#define TYPE_MAX LONG_MAX
#define longtype long
#define ulongtype unsigned long
#ifdef USE_UNSIGNED
#define function ulongtype strtoul
#else
#define function longtype strtol
#endif
#endif


/* Convert NPTR to an `unsigned long int' or `long int' in base BASE.
   If BASE is 0 the base is determined by the presence of a leading
   zero, indicating octal or a leading "0x" or "0X", indicating hexadecimal.
   If BASE is < 2 or > 36, it is reset to 10.
   If ENDPTR is not NULL, a pointer to the character after the last
   one converted is stored in *ENDPTR.	*/


function (const char *nptr,char **endptr,int base)
{
  int negative;
  register ulongtype cutoff;
  register unsigned int cutlim;
  register ulongtype i;
  register const char *s;
  register unsigned char c;
  const char *save;
  int overflow;

  if (base < 0 || base == 1 || base > 36)
    base = 10;

  s = nptr;

  /* Skip white space.	*/
  while (isspace (*s))
    ++s;
  if (*s == '\0')
  {
    goto noconv;
  }

  /* Check for a sign.	*/
  if (*s == '-')
  {
    negative = 1;
    ++s;
  }
  else if (*s == '+')
  {
    negative = 0;
    ++s;
  }
  else
    negative = 0;

  if (base == 16 && s[0] == '0' && toupper (s[1]) == 'X')
    s += 2;

  /* If BASE is zero, figure it out ourselves.	*/
  if (base == 0)
  {
    if (*s == '0')
    {
      if (toupper (s[1]) == 'X')
      {
	s += 2;
	base = 16;
      }
      else
	base = 8;
    }
    else
      base = 10;
  }

  /* Save the pointer so we can check later if anything happened.  */
  save = s;

  cutoff = UTYPE_MAX / (unsigned long int) base;
  cutlim = (uint) (UTYPE_MAX % (unsigned long int) base);

  overflow = 0;
  i = 0;
  for (c = *s; c != '\0'; c = *++s)
  {
    if (isdigit (c))
      c -= '0';
    else if (isalpha (c))
      c = toupper (c) - 'A' + 10;
    else
      break;
    if (c >= base)
      break;
    /* Check for overflow.  */
    if (i > cutoff || (i == cutoff && c > cutlim))
      overflow = 1;
    else
    {
      i *= (ulongtype) base;
      i += c;
    }
  }

  /* Check if anything actually happened.  */
  if (s == save)
    goto noconv;

  /* Store in ENDPTR the address of one character
     past the last character we converted.  */
  if (endptr != NULL)
    *endptr = (char *) s;

#ifndef USE_UNSIGNED
  /* Check for a value that is within the range of
     `unsigned long int', but outside the range of `long int'.	*/
  if (negative)
  {
    if (i  > (ulongtype) TYPE_MIN)
      overflow = 1;
  }
  else if (i > (ulongtype) TYPE_MAX)
    overflow = 1;
#endif

  if (overflow)
  {
    my_errno=ERANGE;
#ifdef USE_UNSIGNED
    return UTYPE_MAX;
#else
    return negative ? TYPE_MIN : TYPE_MAX;
#endif
  }

  /* Return the result of the appropriate sign.  */
  return (negative ? -((longtype) i) : (longtype) i);

noconv:
  /* There was no number to convert.  */
  my_errno=EDOM;
  if (endptr != NULL)
    *endptr = (char *) nptr;
  return 0L;
}


#endif