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. */
53 /* The extra casts work around common compiler bugs. */
54 #define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
55 /* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
56 It is necessary at least when t == time_t. */
57 #define TYPE_MINIMUM(t) ((t) (TYPE_SIGNED (t) \
58 ? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) : (t) 0))
59 #define TYPE_MAXIMUM(t) (~ (t) 0 - TYPE_MINIMUM (t))
62 # define ULONG_MAX TYPE_MAXIMUM (unsigned long int)
66 # define LONG_MAX TYPE_MAXIMUM (long int)
71 #define BKM_SCALE(x, scale_factor, error_return) \
74 if ((x) > (double) __ZLONG_MAX / (scale_factor)) \
75 return (error_return); \
76 (x) *= (scale_factor); \
80 __unsigned long int __strtol ();
85 __xstrtol (s, ptr, base, val, valid_suffixes)
89 __unsigned long int *val;
90 const char *valid_suffixes;
94 __unsigned long int tmp;
96 assert (0 <= base && base <= 36);
98 p = (ptr ? ptr : &t_ptr);
101 tmp = __strtol (s, p, base);
103 return LONGINT_OVERFLOW;
105 return LONGINT_INVALID;
107 /* Let valid_suffixes == NULL mean `allow any suffix'. */
108 /* FIXME: update all callers except the one in tail.c changing
109 last parameter NULL to `""'. */
118 if (!strchr (valid_suffixes, **p))
119 return LONGINT_INVALID_SUFFIX_CHAR;
124 BKM_SCALE (tmp, 512, LONGINT_OVERFLOW);
134 BKM_SCALE (tmp, 1024, LONGINT_OVERFLOW);
139 BKM_SCALE (tmp, 1024 * 1024, LONGINT_OVERFLOW);
144 BKM_SCALE (tmp, 2, LONGINT_OVERFLOW);
149 return LONGINT_INVALID_SUFFIX_CHAR;
158 #ifdef TESTING_XSTRTO
166 main (int argc, char** argv)
171 program_name = argv[0];
172 for (i=1; i<argc; i++)
175 __unsigned long int val;
177 s_err = __xstrtol (argv[i], &p, 0, &val, "bckmw");
178 if (s_err == LONGINT_OK)
180 printf ("%s->%lu (%s)\n", argv[i], val, p);
184 STRTOL_FATAL_ERROR (argv[i], "arg", s_err);
190 #endif /* TESTING_XSTRTO */