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/* A more useful interface to strtol.
Copyright (C) 1995, 1996 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, 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* Written by Jim Meyering. */
#if HAVE_CONFIG_H
# include <config.h>
#endif
#if STDC_HEADERS
# include <stdlib.h>
#endif
#if HAVE_STRING_H
# include <string.h>
#else
# include <strings.h>
# ifndef strchr
# define strchr index
# endif
#endif
#define NDEBUG
#include <assert.h>
#include <errno.h>
#ifndef errno
extern int errno;
#endif
#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 ((long int) (ULONG_MAX >> 1))
#endif
#include "xstrtol.h"
#define BKM_SCALE(x, scale_factor, error_return) \
do \
{ \
if ((x) > (double) __ZLONG_MAX / (scale_factor)) \
return (error_return); \
(x) *= (scale_factor); \
} \
while (0)
__unsigned long int __strtol ();
/* FIXME: comment. */
strtol_error
__xstrtol (s, ptr, base, val, valid_suffixes)
const char *s;
char **ptr;
int base;
__unsigned long int *val;
const char *valid_suffixes;
{
char *t_ptr;
char **p;
__unsigned long int tmp;
assert (0 <= base && base <= 36);
p = (ptr ? ptr : &t_ptr);
errno = 0;
tmp = __strtol (s, p, base);
if (errno != 0)
return LONGINT_OVERFLOW;
if (*p == s)
return LONGINT_INVALID;
/* Let valid_suffixes == NULL mean `allow any suffix'. */
/* FIXME: update all callers except the one in tail.c changing
last parameter NULL to `""'. */
if (!valid_suffixes)
{
*val = tmp;
return LONGINT_OK;
}
if (**p != '\0')
{
if (!strchr (valid_suffixes, **p))
return LONGINT_INVALID_SUFFIX_CHAR;
switch (**p)
{
case 'b':
BKM_SCALE (tmp, 512, LONGINT_OVERFLOW);
++(*p);
break;
case 'c':
++(*p);
break;
case 'B':
case 'k':
BKM_SCALE (tmp, 1024, LONGINT_OVERFLOW);
++(*p);
break;
case 'm':
BKM_SCALE (tmp, 1024 * 1024, LONGINT_OVERFLOW);
++(*p);
break;
case 'w':
BKM_SCALE (tmp, 2, LONGINT_OVERFLOW);
++(*p);
break;
default:
return LONGINT_INVALID_SUFFIX_CHAR;
break;
}
}
*val = tmp;
return LONGINT_OK;
}
#ifdef TESTING_XSTRTO
# include <stdio.h>
# include "error.h"
char *program_name;
int
main (int argc, char** argv)
{
strtol_error s_err;
int i;
program_name = argv[0];
for (i=1; i<argc; i++)
{
char *p;
__unsigned long int val;
s_err = __xstrtol (argv[i], &p, 0, &val, "bckmw");
if (s_err == LONGINT_OK)
{
printf ("%s->%lu (%s)\n", argv[i], val, p);
}
else
{
STRTOL_FATAL_ERROR (argv[i], "arg", s_err);
}
}
exit (0);
}
#endif /* TESTING_XSTRTO */
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