1 /* A more useful interface to strtol.
2 Copyright (C) 1995, 1996, 1998 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
18 /* Written by Jim Meyering. */
24 /* Some pre-ANSI implementations (e.g. SunOS 4)
25 need stderr defined if assertion checking is enabled. */
56 /* The extra casts work around common compiler bugs. */
57 #define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
58 /* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
59 It is necessary at least when t == time_t. */
60 #define TYPE_MINIMUM(t) ((t) (TYPE_SIGNED (t) \
61 ? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) : (t) 0))
62 #define TYPE_MAXIMUM(t) (~ (t) 0 - TYPE_MINIMUM (t))
65 # define ULONG_MAX TYPE_MAXIMUM (unsigned long int)
69 # define LONG_MAX TYPE_MAXIMUM (long int)
74 __unsigned long int __strtol ();
77 bkm_scale (__unsigned long int *x, int scale_factor)
79 __unsigned long int product = *x * scale_factor;
80 if (*x != product / scale_factor)
87 bkm_scale_by_power (__unsigned long int *x, int base, int power)
90 if (bkm_scale (x, base))
99 __xstrtol (const char *s, char **ptr, int strtol_base,
100 __unsigned long int *val, const char *valid_suffixes)
104 __unsigned long int tmp;
106 assert (0 <= strtol_base && strtol_base <= 36);
108 p = (ptr ? ptr : &t_ptr);
111 tmp = __strtol (s, p, strtol_base);
113 return LONGINT_OVERFLOW;
115 return LONGINT_INVALID;
117 /* Let valid_suffixes == NULL mean `allow any suffix'. */
118 /* FIXME: update all callers except the one in tail.c changing
119 last parameter NULL to `""'. */
132 if (!strchr (valid_suffixes, **p))
133 return LONGINT_INVALID_SUFFIX_CHAR;
135 if (strchr (valid_suffixes, '0'))
137 /* The ``valid suffix'' '0' is a special flag meaning that
138 an optional second suffix is allowed, which can change
139 the base, e.g. "100MD" for 100 megabytes decimal. */
157 overflow = bkm_scale (&tmp, 512);
161 overflow = bkm_scale (&tmp, 1024);
169 overflow = bkm_scale_by_power (&tmp, base, 6);
173 overflow = bkm_scale_by_power (&tmp, base, 3);
177 overflow = bkm_scale_by_power (&tmp, base, 1);
181 case 'm': /* 'm' is undocumented; for backward compatibility only */
182 overflow = bkm_scale_by_power (&tmp, base, 2);
186 overflow = bkm_scale_by_power (&tmp, base, 5);
190 overflow = bkm_scale_by_power (&tmp, base, 4);
194 overflow = bkm_scale (&tmp, 2);
197 case 'Y': /* Yotta */
198 overflow = bkm_scale_by_power (&tmp, base, 8);
201 case 'Z': /* Zetta */
202 overflow = bkm_scale_by_power (&tmp, base, 7);
206 return LONGINT_INVALID_SUFFIX_CHAR;
211 return LONGINT_OVERFLOW;
220 #ifdef TESTING_XSTRTO
228 main (int argc, char** argv)
233 program_name = argv[0];
234 for (i=1; i<argc; i++)
237 __unsigned long int val;
239 s_err = __xstrtol (argv[i], &p, 0, &val, "bckmw");
240 if (s_err == LONGINT_OK)
242 printf ("%s->%lu (%s)\n", argv[i], val, p);
246 STRTOL_FATAL_ERROR (argv[i], "arg", s_err);
252 #endif /* TESTING_XSTRTO */