-#ifdef HAVE_CONFIG_H
-#include <config.h>
+/* A more useful interface to strtol.
+ 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
+ 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
-#ifdef STDC_HEADERS
-#include <stdlib.h>
-#else
-long int __strtol (const char *, char **, int base);
+#include <stdio.h>
+
+#if STDC_HEADERS
+# include <stdlib.h>
#endif
-#ifdef HAVE_STRING_H
+#if HAVE_STRING_H
# include <string.h>
#else
# include <strings.h>
# endif
#endif
+/* Some pre-ANSI implementations (e.g. SunOS 4)
+ need stderr defined if assertion checking is enabled. */
+#ifndef NDEBUG
+# include <stdio.h>
+#endif
+
#include <assert.h>
-/* FIXME: define NDEBUG before release. */
#include <errno.h>
#ifndef errno
#endif
#if HAVE_LIMITS_H
-#include <limits.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"
-#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 ();
+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);
errno = 0;
- tmp = __strtol (s, p, base);
+ tmp = __strtol (s, p, strtol_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)
{
- if (**p == '\0')
- {
- *val = tmp;
- return LONGINT_OK;
- }
- else
- return LONGINT_INVALID_SUFFIX_CHAR;
+ *val = tmp;
+ return LONGINT_OK;
}
- if (**p != '\0' && strchr (valid_suffixes, **p))
+ 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 'm':
- BKM_SCALE (tmp, 1024 * 1024, LONGINT_OVERFLOW);
- ++(*p);
+ 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': /* 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;
#ifdef TESTING_XSTRTO
-#include <stdio.h>
-#include "error.h"
+# include <stdio.h>
+# include "error.h"
char *program_name;
}
exit (0);
}
+
#endif /* TESTING_XSTRTO */
projects / gnulib.git / blobdiff