1 /* A more useful interface to strtol.
3 Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2003, 2004, 2005
4 Free Software Foundation, Inc.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software Foundation,
18 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20 /* Written by Jim Meyering. */
29 # define __strtol strtol
30 # define __strtol_t long int
31 # define __xstrtol xstrtol
32 # define STRTOL_T_MINIMUM LONG_MIN
33 # define STRTOL_T_MAXIMUM LONG_MAX
36 /* Some pre-ANSI implementations (e.g. SunOS 4)
37 need stderr defined if assertion checking is enabled. */
49 #ifndef STRTOL_T_MINIMUM
50 # define STRTOL_T_MINIMUM TYPE_MINIMUM (__strtol_t)
51 # define STRTOL_T_MAXIMUM TYPE_MAXIMUM (__strtol_t)
54 #if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII))
55 # define IN_CTYPE_DOMAIN(c) 1
57 # define IN_CTYPE_DOMAIN(c) isascii(c)
60 #define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (c))
62 #if !HAVE_DECL_STRTOIMAX && !defined strtoimax
63 intmax_t strtoimax ();
66 #if !HAVE_DECL_STRTOUMAX && !defined strtoumax
67 uintmax_t strtoumax ();
71 bkm_scale (__strtol_t *x, int scale_factor)
73 if (TYPE_SIGNED (__strtol_t) && *x < STRTOL_T_MINIMUM / scale_factor)
75 *x = STRTOL_T_MINIMUM;
76 return LONGINT_OVERFLOW;
78 if (STRTOL_T_MAXIMUM / scale_factor < *x)
80 *x = STRTOL_T_MAXIMUM;
81 return LONGINT_OVERFLOW;
88 bkm_scale_by_power (__strtol_t *x, int base, int power)
90 strtol_error err = LONGINT_OK;
92 err |= bkm_scale (x, base);
99 __xstrtol (const char *s, char **ptr, int strtol_base,
100 __strtol_t *val, const char *valid_suffixes)
105 strtol_error err = LONGINT_OK;
107 assert (0 <= strtol_base && strtol_base <= 36);
109 p = (ptr ? ptr : &t_ptr);
111 if (! TYPE_SIGNED (__strtol_t))
114 unsigned char ch = *q;
118 return LONGINT_INVALID;
122 tmp = __strtol (s, p, strtol_base);
126 /* If there is no number but there is a valid suffix, assume the
127 number is 1. The string is invalid otherwise. */
128 if (valid_suffixes && **p && strchr (valid_suffixes, **p))
131 return LONGINT_INVALID;
136 return LONGINT_INVALID;
137 err = LONGINT_OVERFLOW;
140 /* Let valid_suffixes == NULL mean `allow any suffix'. */
141 /* FIXME: update all callers except the ones that allow suffixes
142 after the number, changing last parameter NULL to `""'. */
153 strtol_error overflow;
155 if (!strchr (valid_suffixes, **p))
158 return err | LONGINT_INVALID_SUFFIX_CHAR;
161 if (strchr (valid_suffixes, '0'))
163 /* The ``valid suffix'' '0' is a special flag meaning that
164 an optional second suffix is allowed, which can change
165 the base. A suffix "B" (e.g. "100MB") stands for a power
166 of 1000, whereas a suffix "iB" (e.g. "100MiB") stands for
167 a power of 1024. If no suffix (e.g. "100M"), assume
178 case 'D': /* 'D' is obsolescent */
188 overflow = bkm_scale (&tmp, 512);
192 overflow = bkm_scale (&tmp, 1024);
199 case 'E': /* exa or exbi */
200 overflow = bkm_scale_by_power (&tmp, base, 6);
203 case 'G': /* giga or gibi */
204 case 'g': /* 'g' is undocumented; for compatibility only */
205 overflow = bkm_scale_by_power (&tmp, base, 3);
210 overflow = bkm_scale_by_power (&tmp, base, 1);
213 case 'M': /* mega or mebi */
214 case 'm': /* 'm' is undocumented; for compatibility only */
215 overflow = bkm_scale_by_power (&tmp, base, 2);
218 case 'P': /* peta or pebi */
219 overflow = bkm_scale_by_power (&tmp, base, 5);
222 case 'T': /* tera or tebi */
223 case 't': /* 't' is undocumented; for compatibility only */
224 overflow = bkm_scale_by_power (&tmp, base, 4);
228 overflow = bkm_scale (&tmp, 2);
231 case 'Y': /* yotta or 2**80 */
232 overflow = bkm_scale_by_power (&tmp, base, 8);
235 case 'Z': /* zetta or 2**70 */
236 overflow = bkm_scale_by_power (&tmp, base, 7);
241 return err | LONGINT_INVALID_SUFFIX_CHAR;
247 err |= LONGINT_INVALID_SUFFIX_CHAR;
254 #ifdef TESTING_XSTRTO
262 main (int argc, char **argv)
267 program_name = argv[0];
268 for (i=1; i<argc; i++)
273 s_err = __xstrtol (argv[i], &p, 0, &val, "bckmw");
274 if (s_err == LONGINT_OK)
276 printf ("%s->%lu (%s)\n", argv[i], val, p);
280 STRTOL_FATAL_ERROR (argv[i], "arg", s_err);
286 #endif /* TESTING_XSTRTO */