1 /* A more useful interface to strtol.
2 Copyright 1995, 1996, 1998, 1999 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. */
25 # define __strtol strtol
26 # define __strtol_t long int
27 # define __xstrtol xstrtol
30 /* Some pre-ANSI implementations (e.g. SunOS 4)
31 need stderr defined if assertion checking is enabled. */
63 /* The extra casts work around common compiler bugs. */
64 #define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
65 /* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
66 It is necessary at least when t == time_t. */
67 #define TYPE_MINIMUM(t) ((t) (TYPE_SIGNED (t) \
68 ? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) : (t) 0))
69 #define TYPE_MAXIMUM(t) (~ (t) 0 - TYPE_MINIMUM (t))
71 #if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII))
72 # define IN_CTYPE_DOMAIN(c) 1
74 # define IN_CTYPE_DOMAIN(c) isascii(c)
77 #define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (c))
81 __strtol_t __strtol ();
84 bkm_scale (__strtol_t *x, int scale_factor)
86 __strtol_t product = *x * scale_factor;
87 if (*x != product / scale_factor)
94 bkm_scale_by_power (__strtol_t *x, int base, int power)
97 if (bkm_scale (x, base))
103 /* FIXME: comment. */
106 __xstrtol (const char *s, char **ptr, int strtol_base,
107 __strtol_t *val, const char *valid_suffixes)
113 assert (0 <= strtol_base && strtol_base <= 36);
115 p = (ptr ? ptr : &t_ptr);
117 if (! TYPE_SIGNED (__strtol_t))
120 while (ISSPACE ((unsigned char) *q))
123 return LONGINT_INVALID;
127 tmp = __strtol (s, p, strtol_base);
129 return LONGINT_OVERFLOW;
131 return LONGINT_INVALID;
133 /* Let valid_suffixes == NULL mean `allow any suffix'. */
134 /* FIXME: update all callers except the ones that allow suffixes
135 after the number, changing last parameter NULL to `""'. */
148 if (!strchr (valid_suffixes, **p))
151 return LONGINT_INVALID_SUFFIX_CHAR;
154 if (strchr (valid_suffixes, '0'))
156 /* The ``valid suffix'' '0' is a special flag meaning that
157 an optional second suffix is allowed, which can change
158 the base, e.g. "100MD" for 100 megabytes decimal. */
176 overflow = bkm_scale (&tmp, 512);
180 overflow = bkm_scale (&tmp, 1024);
188 overflow = bkm_scale_by_power (&tmp, base, 6);
192 overflow = bkm_scale_by_power (&tmp, base, 3);
196 overflow = bkm_scale_by_power (&tmp, base, 1);
200 case 'm': /* 'm' is undocumented; for backward compatibility only */
201 overflow = bkm_scale_by_power (&tmp, base, 2);
205 overflow = bkm_scale_by_power (&tmp, base, 5);
209 overflow = bkm_scale_by_power (&tmp, base, 4);
213 overflow = bkm_scale (&tmp, 2);
216 case 'Y': /* Yotta */
217 overflow = bkm_scale_by_power (&tmp, base, 8);
220 case 'Z': /* Zetta */
221 overflow = bkm_scale_by_power (&tmp, base, 7);
226 return LONGINT_INVALID_SUFFIX_CHAR;
231 return LONGINT_OVERFLOW;
240 #ifdef TESTING_XSTRTO
248 main (int argc, char** argv)
253 program_name = argv[0];
254 for (i=1; i<argc; i++)
259 s_err = __xstrtol (argv[i], &p, 0, &val, "bckmw");
260 if (s_err == LONGINT_OK)
262 printf ("%s->%lu (%s)\n", argv[i], val, p);
266 STRTOL_FATAL_ERROR (argv[i], "arg", s_err);
272 #endif /* TESTING_XSTRTO */