1 /* A more useful interface to strtol.
3 Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
20 /* Written by Jim Meyering. */
23 # define __strtol strtol
24 # define __strtol_t long int
25 # define __xstrtol xstrtol
26 # define STRTOL_T_MINIMUM LONG_MIN
27 # define STRTOL_T_MAXIMUM LONG_MAX
34 /* Some pre-ANSI implementations (e.g. SunOS 4)
35 need stderr defined if assertion checking is enabled. */
48 bkm_scale (__strtol_t *x, int scale_factor)
50 if (TYPE_SIGNED (__strtol_t) && *x < STRTOL_T_MINIMUM / scale_factor)
52 *x = STRTOL_T_MINIMUM;
53 return LONGINT_OVERFLOW;
55 if (STRTOL_T_MAXIMUM / scale_factor < *x)
57 *x = STRTOL_T_MAXIMUM;
58 return LONGINT_OVERFLOW;
65 bkm_scale_by_power (__strtol_t *x, int base, int power)
67 strtol_error err = LONGINT_OK;
69 err |= bkm_scale (x, base);
76 __xstrtol (const char *s, char **ptr, int strtol_base,
77 __strtol_t *val, const char *valid_suffixes)
82 strtol_error err = LONGINT_OK;
84 assert (0 <= strtol_base && strtol_base <= 36);
86 p = (ptr ? ptr : &t_ptr);
88 if (! TYPE_SIGNED (__strtol_t))
91 unsigned char ch = *q;
95 return LONGINT_INVALID;
99 tmp = __strtol (s, p, strtol_base);
103 /* If there is no number but there is a valid suffix, assume the
104 number is 1. The string is invalid otherwise. */
105 if (valid_suffixes && **p && strchr (valid_suffixes, **p))
108 return LONGINT_INVALID;
113 return LONGINT_INVALID;
114 err = LONGINT_OVERFLOW;
117 /* Let valid_suffixes == NULL mean `allow any suffix'. */
118 /* FIXME: update all callers except the ones that allow suffixes
119 after the number, changing last parameter NULL to `""'. */
130 strtol_error overflow;
132 if (!strchr (valid_suffixes, **p))
135 return err | LONGINT_INVALID_SUFFIX_CHAR;
138 if (strchr (valid_suffixes, '0'))
140 /* The ``valid suffix'' '0' is a special flag meaning that
141 an optional second suffix is allowed, which can change
142 the base. A suffix "B" (e.g. "100MB") stands for a power
143 of 1000, whereas a suffix "iB" (e.g. "100MiB") stands for
144 a power of 1024. If no suffix (e.g. "100M"), assume
155 case 'D': /* 'D' is obsolescent */
165 overflow = bkm_scale (&tmp, 512);
169 overflow = bkm_scale (&tmp, 1024);
176 case 'E': /* exa or exbi */
177 overflow = bkm_scale_by_power (&tmp, base, 6);
180 case 'G': /* giga or gibi */
181 case 'g': /* 'g' is undocumented; for compatibility only */
182 overflow = bkm_scale_by_power (&tmp, base, 3);
187 overflow = bkm_scale_by_power (&tmp, base, 1);
190 case 'M': /* mega or mebi */
191 case 'm': /* 'm' is undocumented; for compatibility only */
192 overflow = bkm_scale_by_power (&tmp, base, 2);
195 case 'P': /* peta or pebi */
196 overflow = bkm_scale_by_power (&tmp, base, 5);
199 case 'T': /* tera or tebi */
200 case 't': /* 't' is undocumented; for compatibility only */
201 overflow = bkm_scale_by_power (&tmp, base, 4);
205 overflow = bkm_scale (&tmp, 2);
208 case 'Y': /* yotta or 2**80 */
209 overflow = bkm_scale_by_power (&tmp, base, 8);
212 case 'Z': /* zetta or 2**70 */
213 overflow = bkm_scale_by_power (&tmp, base, 7);
218 return err | LONGINT_INVALID_SUFFIX_CHAR;
224 err |= LONGINT_INVALID_SUFFIX_CHAR;
231 #ifdef TESTING_XSTRTO
239 main (int argc, char **argv)
244 program_name = argv[0];
245 for (i=1; i<argc; i++)
250 s_err = __xstrtol (argv[i], &p, 0, &val, "bckmw");
251 if (s_err == LONGINT_OK)
253 printf ("%s->%lu (%s)\n", argv[i], val, p);
257 STRTOL_FATAL_ERROR (argv[i], "arg", s_err);
263 #endif /* TESTING_XSTRTO */