1 /* A more useful interface to strtol.
3 Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2003 Free
4 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. */
27 # define __strtol strtol
28 # define __strtol_t long int
29 # define __xstrtol xstrtol
32 /* Some pre-ANSI implementations (e.g. SunOS 4)
33 need stderr defined if assertion checking is enabled. */
59 /* The extra casts work around common compiler bugs. */
60 #define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
62 #if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII))
63 # define IN_CTYPE_DOMAIN(c) 1
65 # define IN_CTYPE_DOMAIN(c) isascii(c)
68 #define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (c))
72 #if !HAVE_DECL_STRTOL && !defined strtol
76 #if !HAVE_DECL_STRTOUL && !defined strtoul
77 unsigned long int strtoul ();
80 #if !HAVE_DECL_STRTOIMAX && !defined strtoimax
81 intmax_t strtoimax ();
84 #if !HAVE_DECL_STRTOUMAX && !defined strtoumax
85 uintmax_t strtoumax ();
89 bkm_scale (__strtol_t *x, int scale_factor)
91 __strtol_t product = *x * scale_factor;
92 if (*x != product / scale_factor)
99 bkm_scale_by_power (__strtol_t *x, int base, int power)
102 if (bkm_scale (x, base))
108 /* FIXME: comment. */
111 __xstrtol (const char *s, char **ptr, int strtol_base,
112 __strtol_t *val, const char *valid_suffixes)
118 assert (0 <= strtol_base && strtol_base <= 36);
120 p = (ptr ? ptr : &t_ptr);
122 if (! TYPE_SIGNED (__strtol_t))
125 while (ISSPACE ((unsigned char) *q))
128 return LONGINT_INVALID;
132 tmp = __strtol (s, p, strtol_base);
134 return LONGINT_OVERFLOW;
138 /* If there is no number but there is a valid suffix, assume the
139 number is 1. The string is invalid otherwise. */
140 if (valid_suffixes && **p && strchr (valid_suffixes, **p))
143 return LONGINT_INVALID;
146 /* Let valid_suffixes == NULL mean `allow any suffix'. */
147 /* FIXME: update all callers except the ones that allow suffixes
148 after the number, changing last parameter NULL to `""'. */
161 if (!strchr (valid_suffixes, **p))
164 return LONGINT_INVALID_SUFFIX_CHAR;
167 if (strchr (valid_suffixes, '0'))
169 /* The ``valid suffix'' '0' is a special flag meaning that
170 an optional second suffix is allowed, which can change
171 the base. A suffix "B" (e.g. "100MB") stands for a power
172 of 1000, whereas a suffix "iB" (e.g. "100MiB") stands for
173 a power of 1024. If no suffix (e.g. "100M"), assume
184 case 'D': /* 'D' is obsolescent */
194 overflow = bkm_scale (&tmp, 512);
198 overflow = bkm_scale (&tmp, 1024);
205 case 'E': /* exa or exbi */
206 overflow = bkm_scale_by_power (&tmp, base, 6);
209 case 'G': /* giga or gibi */
210 case 'g': /* 'g' is undocumented; for compatibility only */
211 overflow = bkm_scale_by_power (&tmp, base, 3);
216 overflow = bkm_scale_by_power (&tmp, base, 1);
219 case 'M': /* mega or mebi */
220 case 'm': /* 'm' is undocumented; for compatibility only */
221 overflow = bkm_scale_by_power (&tmp, base, 2);
224 case 'P': /* peta or pebi */
225 overflow = bkm_scale_by_power (&tmp, base, 5);
228 case 'T': /* tera or tebi */
229 case 't': /* 't' is undocumented; for compatibility only */
230 overflow = bkm_scale_by_power (&tmp, base, 4);
234 overflow = bkm_scale (&tmp, 2);
237 case 'Y': /* yotta or 2**80 */
238 overflow = bkm_scale_by_power (&tmp, base, 8);
241 case 'Z': /* zetta or 2**70 */
242 overflow = bkm_scale_by_power (&tmp, base, 7);
247 return LONGINT_INVALID_SUFFIX_CHAR;
252 return LONGINT_OVERFLOW;
261 #ifdef TESTING_XSTRTO
269 main (int argc, char** argv)
274 program_name = argv[0];
275 for (i=1; i<argc; i++)
280 s_err = __xstrtol (argv[i], &p, 0, &val, "bckmw");
281 if (s_err == LONGINT_OK)
283 printf ("%s->%lu (%s)\n", argv[i], val, p);
287 STRTOL_FATAL_ERROR (argv[i], "arg", s_err);
293 #endif /* TESTING_XSTRTO */