1 /* A more useful interface to strtol.
2 Copyright (C) 1995, 1996, 1998-2001 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 #if !HAVE_DECL_STRTOL && !defined strtol
85 #if !HAVE_DECL_STRTOUL && !defined strtoul
86 unsigned long int strtoul ();
89 #if !HAVE_DECL_STRTOIMAX && !defined strtoimax
90 intmax_t strtoimax ();
93 #if !HAVE_DECL_STRTOUMAX && !defined strtoumax
94 uintmax_t strtoumax ();
98 bkm_scale (__strtol_t *x, int scale_factor)
100 __strtol_t product = *x * scale_factor;
101 if (*x != product / scale_factor)
108 bkm_scale_by_power (__strtol_t *x, int base, int power)
111 if (bkm_scale (x, base))
117 /* FIXME: comment. */
120 __xstrtol (const char *s, char **ptr, int strtol_base,
121 __strtol_t *val, const char *valid_suffixes)
127 assert (0 <= strtol_base && strtol_base <= 36);
129 p = (ptr ? ptr : &t_ptr);
131 if (! TYPE_SIGNED (__strtol_t))
134 while (ISSPACE ((unsigned char) *q))
137 return LONGINT_INVALID;
141 tmp = __strtol (s, p, strtol_base);
143 return LONGINT_OVERFLOW;
147 /* If there is no number but there is a valid suffix, assume the
148 number is 1. The string is invalid otherwise. */
149 if (valid_suffixes && **p && strchr (valid_suffixes, **p))
152 return LONGINT_INVALID;
155 /* Let valid_suffixes == NULL mean `allow any suffix'. */
156 /* FIXME: update all callers except the ones that allow suffixes
157 after the number, changing last parameter NULL to `""'. */
170 if (!strchr (valid_suffixes, **p))
173 return LONGINT_INVALID_SUFFIX_CHAR;
176 if (strchr (valid_suffixes, '0'))
178 /* The ``valid suffix'' '0' is a special flag meaning that
179 an optional second suffix is allowed, which can change
180 the base. A suffix "B" (e.g. "100MB") stands for a power
181 of 1000, whereas a suffix "iB" (e.g. "100MiB") stands for
182 a power of 1024. If no suffix (e.g. "100M"), assume
193 case 'D': /* 'D' is obsolescent */
203 overflow = bkm_scale (&tmp, 512);
207 overflow = bkm_scale (&tmp, 1024);
214 case 'E': /* exa or exbi */
215 overflow = bkm_scale_by_power (&tmp, base, 6);
218 case 'G': /* giga or gibi */
219 case 'g': /* 'g' is undocumented; for compatibility only */
220 overflow = bkm_scale_by_power (&tmp, base, 3);
225 overflow = bkm_scale_by_power (&tmp, base, 1);
228 case 'M': /* mega or mebi */
229 case 'm': /* 'm' is undocumented; for compatibility only */
230 overflow = bkm_scale_by_power (&tmp, base, 2);
233 case 'P': /* peta or pebi */
234 overflow = bkm_scale_by_power (&tmp, base, 5);
237 case 'T': /* tera or tebi */
238 case 't': /* 't' is undocumented; for compatibility only */
239 overflow = bkm_scale_by_power (&tmp, base, 4);
243 overflow = bkm_scale (&tmp, 2);
246 case 'Y': /* yotta or 2**80 */
247 overflow = bkm_scale_by_power (&tmp, base, 8);
250 case 'Z': /* zetta or 2**70 */
251 overflow = bkm_scale_by_power (&tmp, base, 7);
256 return LONGINT_INVALID_SUFFIX_CHAR;
261 return LONGINT_OVERFLOW;
270 #ifdef TESTING_XSTRTO
278 main (int argc, char** argv)
283 program_name = argv[0];
284 for (i=1; i<argc; i++)
289 s_err = __xstrtol (argv[i], &p, 0, &val, "bckmw");
290 if (s_err == LONGINT_OK)
292 printf ("%s->%lu (%s)\n", argv[i], val, p);
296 STRTOL_FATAL_ERROR (argv[i], "arg", s_err);
302 #endif /* TESTING_XSTRTO */