296 lines
6.4 KiB
C
296 lines
6.4 KiB
C
/* A more useful interface to strtol.
|
|
|
|
Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2003 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
|
|
|
|
#ifndef __strtol
|
|
# define __strtol strtol
|
|
# define __strtol_t long int
|
|
# define __xstrtol xstrtol
|
|
# define STRTOL_T_MINIMUM LONG_MIN
|
|
# define STRTOL_T_MAXIMUM LONG_MAX
|
|
#endif
|
|
|
|
/* Some pre-ANSI implementations (e.g. SunOS 4)
|
|
need stderr defined if assertion checking is enabled. */
|
|
#include <stdio.h>
|
|
|
|
#include <assert.h>
|
|
#include <ctype.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include <errno.h>
|
|
#ifndef errno
|
|
extern int errno;
|
|
#endif
|
|
|
|
#include <limits.h>
|
|
|
|
/* The extra casts work around common compiler bugs. */
|
|
#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
|
|
#define TYPE_MINIMUM(t) ((t) (TYPE_SIGNED (t) \
|
|
? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) \
|
|
: (t) 0))
|
|
#define TYPE_MAXIMUM(t) ((t) (~ (t) 0 - TYPE_MINIMUM (t)))
|
|
|
|
#ifndef STRTOL_T_MINIMUM
|
|
# define STRTOL_T_MINIMUM TYPE_MINIMUM (__strtol_t)
|
|
# define STRTOL_T_MAXIMUM TYPE_MAXIMUM (__strtol_t)
|
|
#endif
|
|
|
|
#if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII))
|
|
# define IN_CTYPE_DOMAIN(c) 1
|
|
#else
|
|
# define IN_CTYPE_DOMAIN(c) isascii(c)
|
|
#endif
|
|
|
|
#define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (c))
|
|
|
|
#include "xstrtol.h"
|
|
|
|
#if !HAVE_DECL_STRTOIMAX && !defined strtoimax
|
|
intmax_t strtoimax ();
|
|
#endif
|
|
|
|
#if !HAVE_DECL_STRTOUMAX && !defined strtoumax
|
|
uintmax_t strtoumax ();
|
|
#endif
|
|
|
|
static strtol_error
|
|
bkm_scale (__strtol_t *x, int scale_factor)
|
|
{
|
|
if (TYPE_SIGNED (__strtol_t) && *x < STRTOL_T_MINIMUM / scale_factor)
|
|
{
|
|
*x = STRTOL_T_MINIMUM;
|
|
return LONGINT_OVERFLOW;
|
|
}
|
|
if (STRTOL_T_MAXIMUM / scale_factor < *x)
|
|
{
|
|
*x = STRTOL_T_MAXIMUM;
|
|
return LONGINT_OVERFLOW;
|
|
}
|
|
*x *= scale_factor;
|
|
return LONGINT_OK;
|
|
}
|
|
|
|
static strtol_error
|
|
bkm_scale_by_power (__strtol_t *x, int base, int power)
|
|
{
|
|
strtol_error err = LONGINT_OK;
|
|
while (power--)
|
|
err |= bkm_scale (x, base);
|
|
return err;
|
|
}
|
|
|
|
/* FIXME: comment. */
|
|
|
|
strtol_error
|
|
__xstrtol (const char *s, char **ptr, int strtol_base,
|
|
__strtol_t *val, const char *valid_suffixes)
|
|
{
|
|
char *t_ptr;
|
|
char **p;
|
|
__strtol_t tmp;
|
|
strtol_error err = LONGINT_OK;
|
|
|
|
assert (0 <= strtol_base && strtol_base <= 36);
|
|
|
|
p = (ptr ? ptr : &t_ptr);
|
|
|
|
if (! TYPE_SIGNED (__strtol_t))
|
|
{
|
|
const char *q = s;
|
|
while (ISSPACE ((unsigned char) *q))
|
|
++q;
|
|
if (*q == '-')
|
|
return LONGINT_INVALID;
|
|
}
|
|
|
|
errno = 0;
|
|
tmp = __strtol (s, p, strtol_base);
|
|
|
|
if (*p == s)
|
|
{
|
|
/* If there is no number but there is a valid suffix, assume the
|
|
number is 1. The string is invalid otherwise. */
|
|
if (valid_suffixes && **p && strchr (valid_suffixes, **p))
|
|
tmp = 1;
|
|
else
|
|
return LONGINT_INVALID;
|
|
}
|
|
else if (errno != 0)
|
|
{
|
|
if (errno != ERANGE)
|
|
return LONGINT_INVALID;
|
|
err = LONGINT_OVERFLOW;
|
|
}
|
|
|
|
/* Let valid_suffixes == NULL mean `allow any suffix'. */
|
|
/* FIXME: update all callers except the ones that allow suffixes
|
|
after the number, changing last parameter NULL to `""'. */
|
|
if (!valid_suffixes)
|
|
{
|
|
*val = tmp;
|
|
return err;
|
|
}
|
|
|
|
if (**p != '\0')
|
|
{
|
|
int base = 1024;
|
|
int suffixes = 1;
|
|
strtol_error overflow;
|
|
|
|
if (!strchr (valid_suffixes, **p))
|
|
{
|
|
*val = tmp;
|
|
return err | LONGINT_INVALID_SUFFIX_CHAR;
|
|
}
|
|
|
|
if (strchr (valid_suffixes, '0'))
|
|
{
|
|
/* The ``valid suffix'' '0' is a special flag meaning that
|
|
an optional second suffix is allowed, which can change
|
|
the base. A suffix "B" (e.g. "100MB") stands for a power
|
|
of 1000, whereas a suffix "iB" (e.g. "100MiB") stands for
|
|
a power of 1024. If no suffix (e.g. "100M"), assume
|
|
power-of-1024. */
|
|
|
|
switch (p[0][1])
|
|
{
|
|
case 'i':
|
|
if (p[0][2] == 'B')
|
|
suffixes += 2;
|
|
break;
|
|
|
|
case 'B':
|
|
case 'D': /* 'D' is obsolescent */
|
|
base = 1000;
|
|
suffixes++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
switch (**p)
|
|
{
|
|
case 'b':
|
|
overflow = bkm_scale (&tmp, 512);
|
|
break;
|
|
|
|
case 'B':
|
|
overflow = bkm_scale (&tmp, 1024);
|
|
break;
|
|
|
|
case 'c':
|
|
overflow = 0;
|
|
break;
|
|
|
|
case 'E': /* exa or exbi */
|
|
overflow = bkm_scale_by_power (&tmp, base, 6);
|
|
break;
|
|
|
|
case 'G': /* giga or gibi */
|
|
case 'g': /* 'g' is undocumented; for compatibility only */
|
|
overflow = bkm_scale_by_power (&tmp, base, 3);
|
|
break;
|
|
|
|
case 'k': /* kilo */
|
|
case 'K': /* kibi */
|
|
overflow = bkm_scale_by_power (&tmp, base, 1);
|
|
break;
|
|
|
|
case 'M': /* mega or mebi */
|
|
case 'm': /* 'm' is undocumented; for compatibility only */
|
|
overflow = bkm_scale_by_power (&tmp, base, 2);
|
|
break;
|
|
|
|
case 'P': /* peta or pebi */
|
|
overflow = bkm_scale_by_power (&tmp, base, 5);
|
|
break;
|
|
|
|
case 'T': /* tera or tebi */
|
|
case 't': /* 't' is undocumented; for compatibility only */
|
|
overflow = bkm_scale_by_power (&tmp, base, 4);
|
|
break;
|
|
|
|
case 'w':
|
|
overflow = bkm_scale (&tmp, 2);
|
|
break;
|
|
|
|
case 'Y': /* yotta or 2**80 */
|
|
overflow = bkm_scale_by_power (&tmp, base, 8);
|
|
break;
|
|
|
|
case 'Z': /* zetta or 2**70 */
|
|
overflow = bkm_scale_by_power (&tmp, base, 7);
|
|
break;
|
|
|
|
default:
|
|
*val = tmp;
|
|
return err | LONGINT_INVALID_SUFFIX_CHAR;
|
|
}
|
|
|
|
err |= overflow;
|
|
*p += suffixes;
|
|
if (**p)
|
|
err |= LONGINT_INVALID_SUFFIX_CHAR;
|
|
}
|
|
|
|
*val = tmp;
|
|
return err;
|
|
}
|
|
|
|
#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;
|
|
__strtol_t 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 */
|