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Changes to strtol.c [branch-1_4]


From: Eric Blake
Subject: Changes to strtol.c [branch-1_4]
Date: Thu, 15 Jun 2006 13:13:30 +0000

CVSROOT:        /sources/m4
Module name:    m4
Branch:         branch-1_4
Changes by:     Eric Blake <ericb>      06/06/15 13:13:26

Index: strtol.c
===================================================================
RCS file: strtol.c
diff -N strtol.c
--- strtol.c    1 May 2005 11:54:12 -0000       1.1.1.1.2.1
+++ /dev/null   1 Jan 1970 00:00:00 -0000
@@ -1,190 +0,0 @@
-/* GNU m4 -- A simple macro processor
-
-   Copyright (C) 1991, 1992 Free Software Foundation, Inc.
-
-   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 Street, Fifth Floor, Boston, MA
-   02110-1301  USA
-*/
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <ctype.h>
-#include <errno.h>
-
-#if HAVE_LIMITS_H
-#include <limits.h>
-#endif
-
-#ifndef ULONG_MAX
-#define ULONG_MAX ((unsigned long) ~(unsigned long) 0)
-#endif
-
-#ifndef LONG_MAX
-#define        LONG_MAX (~(1 << (sizeof (long) * 8 - 1)))
-#endif
-
-#ifndef LONG_MIN
-#define LONG_MIN (-LONG_MAX - 1)
-#endif
-
-#if STDC_HEADERS
-#include <stddef.h>
-#include <stdlib.h>
-#else
-#define NULL 0
-extern int errno;
-#endif
-
-#ifndef        UNSIGNED
-#define        UNSIGNED        0
-#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.  */
-#if    UNSIGNED
-unsigned long int
-#define        strtol  strtoul
-#else
-long int
-#endif
-strtol (nptr, endptr, base)
-     const char *nptr;
-     char **endptr;
-     int base;
-{
-  int negative;
-  register unsigned long int cutoff;
-  register unsigned int cutlim;
-  register unsigned long int 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 = ULONG_MAX / (unsigned long int) base;
-  cutlim = ULONG_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 *= (unsigned long int) 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;
-
-#if    !UNSIGNED
-  /* Check for a value that is within the range of
-     `unsigned long int', but outside the range of `long int'.  */
-  if (i > (negative ?
-          -(unsigned long int) LONG_MIN : (unsigned long int) LONG_MAX))
-    overflow = 1;
-#endif
-
-  if (overflow)
-    {
-      errno = ERANGE;
-#if    UNSIGNED
-      return ULONG_MAX;
-#else
-      return negative ? LONG_MIN : LONG_MAX;
-#endif
-    }
-
-  /* Return the result of the appropriate sign.  */
-  return (negative ? -i : i);
-
-noconv:;
-  /* There was no number to convert.  */
-  if (endptr != NULL)
-    *endptr = (char *) nptr;
-  return 0L;
-}




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