--- /dev/null
+/* A more useful interface to strtol.
+ Copyright (C) 1995, 1996, 1998-2000 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
+#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
+
+#if HAVE_STRING_H
+# include <string.h>
+#else
+# include <strings.h>
+# ifndef strchr
+# define strchr index
+# endif
+#endif
+
+#include <assert.h>
+#include <ctype.h>
+
+#include <errno.h>
+#ifndef errno
+extern int errno;
+#endif
+
+#if HAVE_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))
+
+#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"
+
+#ifndef strtol
+long int strtol ();
+#endif
+
+#ifndef strtoul
+unsigned long int strtoul ();
+#endif
+
+#ifndef strtoumax
+uintmax_t strtoumax ();
+#endif
+
+static int
+bkm_scale (__strtol_t *x, int scale_factor)
+{
+ __strtol_t product = *x * scale_factor;
+ if (*x != product / scale_factor)
+ return 1;
+ *x = product;
+ return 0;
+}
+
+static int
+bkm_scale_by_power (__strtol_t *x, int base, int power)
+{
+ while (power--)
+ if (bkm_scale (x, base))
+ return 1;
+
+ return 0;
+}
+
+/* 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;
+
+ 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 (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 ones that allow suffixes
+ after the number, changing last parameter NULL to `""'. */
+ if (!valid_suffixes)
+ {
+ *val = tmp;
+ return LONGINT_OK;
+ }
+
+ if (**p != '\0')
+ {
+ int base = 1024;
+ int suffixes = 1;
+ int overflow;
+
+ if (!strchr (valid_suffixes, **p))
+ {
+ *val = tmp;
+ 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':
+ overflow = bkm_scale (&tmp, 512);
+ break;
+
+ case 'B':
+ overflow = bkm_scale (&tmp, 1024);
+ break;
+
+ case 'c':
+ overflow = 0;
+ break;
+
+ case 'E': /* Exa */
+ overflow = bkm_scale_by_power (&tmp, base, 6);
+ break;
+
+ case 'G': /* Giga */
+ case 'g': /* 'g' is undocumented; for compatibility only */
+ 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 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 */
+ 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 */
+ overflow = bkm_scale_by_power (&tmp, base, 8);
+ break;
+
+ case 'Z': /* Zetta */
+ overflow = bkm_scale_by_power (&tmp, base, 7);
+ break;
+
+ default:
+ *val = tmp;
+ return LONGINT_INVALID_SUFFIX_CHAR;
+ break;
+ }
+
+ if (overflow)
+ return LONGINT_OVERFLOW;
+
+ (*p) += suffixes;
+ }
+
+ *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;
+ __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 */
projects / chaz / tar / commitdiff
