/* A more useful interface to strtol.
- Copyright (C) 1995, 1996 Free Software Foundation, Inc.
+ Copyright (C) 1995, 1996, 1998 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
# include <config.h>
#endif
+/* Some pre-ANSI implementations (e.g. SunOS 4)
+ need stderr defined if assertion checking is enabled. */
+#include <stdio.h>
+
#if STDC_HEADERS
# include <stdlib.h>
#endif
# endif
#endif
-#define NDEBUG
#include <assert.h>
#include <errno.h>
# include <limits.h>
#endif
+#ifndef CHAR_BIT
+# define CHAR_BIT 8
+#endif
+
+/* The extra casts work around common compiler bugs. */
+#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
+/* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
+ It is necessary at least when t == time_t. */
+#define TYPE_MINIMUM(t) ((t) (TYPE_SIGNED (t) \
+ ? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) : (t) 0))
+#define TYPE_MAXIMUM(t) (~ (t) 0 - TYPE_MINIMUM (t))
+
#ifndef ULONG_MAX
-# define ULONG_MAX ((unsigned long) ~(unsigned long) 0)
+# define ULONG_MAX TYPE_MAXIMUM (unsigned long int)
#endif
#ifndef LONG_MAX
-# define LONG_MAX ((long int) (ULONG_MAX >> 1))
+# define LONG_MAX TYPE_MAXIMUM (long int)
#endif
-#include "xstrtol.h"
+#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 BKM_SCALE(x, scale_factor, error_return) \
- do \
- { \
- if ((x) > (double) __ZLONG_MAX / (scale_factor)) \
- return (error_return); \
- (x) *= (scale_factor); \
- } \
- while (0)
+#ifdef isblank
+# define ISBLANK(c) (IN_CTYPE_DOMAIN (c) && isblank (c))
+#else
+# define ISBLANK(c) ((c) == ' ' || (c) == '\t')
+#endif
+
+#include "xstrtol.h"
__unsigned long int __strtol ();
+static int
+bkm_scale (__unsigned long int *x, int scale_factor)
+{
+ __unsigned long int product = *x * scale_factor;
+ if (*x != product / scale_factor)
+ return 1;
+ *x = product;
+ return 0;
+}
+
+static int
+bkm_scale_by_power (__unsigned long int *x, int base, int power)
+{
+ while (power--)
+ if (bkm_scale (x, base))
+ return 1;
+
+ return 0;
+}
+
/* 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;
+__xstrtol (const char *s, char **ptr, int strtol_base,
+ __unsigned long int *val, const char *valid_suffixes)
{
char *t_ptr;
char **p;
__unsigned long int tmp;
- assert (0 <= base && base <= 36);
+ assert (0 <= strtol_base && strtol_base <= 36);
p = (ptr ? ptr : &t_ptr);
+#if STRING_TO_UNSIGNED
+ {
+ const char *q = s;
+ while (ISBLANK (*q))
+ {
+ ++q;
+ }
+ if (*q == '-')
+ return LONGINT_INVALID;
+ }
+#endif
+
errno = 0;
- tmp = __strtol (s, p, base);
+ tmp = __strtol (s, p, strtol_base);
if (errno != 0)
return LONGINT_OVERFLOW;
if (*p == s)
if (**p != '\0')
{
+ int base = 1024;
+ int suffixes = 1;
+ int overflow;
+
if (!strchr (valid_suffixes, **p))
return 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, e.g. "100MD" for 100 megabytes decimal. */
+
+ switch (p[0][1])
+ {
+ case 'B':
+ suffixes++;
+ break;
+
+ case 'D':
+ base = 1000;
+ suffixes++;
+ break;
+ }
+ }
+
switch (**p)
{
case 'b':
- BKM_SCALE (tmp, 512, LONGINT_OVERFLOW);
- ++(*p);
+ overflow = bkm_scale (&tmp, 512);
+ break;
+
+ case 'B':
+ overflow = bkm_scale (&tmp, 1024);
break;
case 'c':
- ++(*p);
+ overflow = 0;
break;
- case 'B':
- case 'k':
- BKM_SCALE (tmp, 1024, LONGINT_OVERFLOW);
- ++(*p);
+ case 'E': /* Exa */
+ overflow = bkm_scale_by_power (&tmp, base, 6);
+ break;
+
+ case 'G': /* Giga */
+ overflow = bkm_scale_by_power (&tmp, base, 3);
+ break;
+
+ case 'k': /* kilo */
+ overflow = bkm_scale_by_power (&tmp, base, 1);
break;
- case 'm':
- BKM_SCALE (tmp, 1024 * 1024, LONGINT_OVERFLOW);
- ++(*p);
+ case 'M': /* Mega */
+ case 'm': /* 'm' is undocumented; for backward compatibility only */
+ overflow = bkm_scale_by_power (&tmp, base, 2);
+ break;
+
+ case 'P': /* Peta */
+ overflow = bkm_scale_by_power (&tmp, base, 5);
+ break;
+
+ case 'T': /* Tera */
+ overflow = bkm_scale_by_power (&tmp, base, 4);
break;
case 'w':
- BKM_SCALE (tmp, 2, LONGINT_OVERFLOW);
- ++(*p);
+ overflow = bkm_scale (&tmp, 2);
+ break;
+
+ case 'Y': /* Yotta */
+ overflow = bkm_scale_by_power (&tmp, base, 8);
+ break;
+
+ case 'Z': /* Zetta */
+ overflow = bkm_scale_by_power (&tmp, base, 7);
break;
default:
return LONGINT_INVALID_SUFFIX_CHAR;
break;
}
+
+ if (overflow)
+ return LONGINT_OVERFLOW;
+
+ (*p) += suffixes;
}
*val = tmp;