1 /* A more useful interface to strtol.
3 Copyright (C) 1995-1996, 1998-2001, 2003-2007, 2009-2017 Free Software
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 3 of the License, or
9 (at your option) any later version.
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, see <https://www.gnu.org/licenses/>. */
19 /* Written by Jim Meyering. */
22 # define __strtol strtol
23 # define __strtol_t long int
24 # define __xstrtol xstrtol
25 # define STRTOL_T_MINIMUM LONG_MIN
26 # define STRTOL_T_MAXIMUM LONG_MAX
33 /* Some pre-ANSI implementations (e.g. SunOS 4)
34 need stderr defined if assertion checking is enabled. */
46 /* xstrtoll.c and xstrtoull.c, which include this file, require that
47 ULLONG_MAX, LLONG_MAX, LLONG_MIN are defined, but <limits.h> does not
48 define them on all platforms. */
50 # define ULLONG_MAX TYPE_MAXIMUM (unsigned long long)
53 # define LLONG_MAX TYPE_MAXIMUM (long long int)
56 # define LLONG_MIN TYPE_MINIMUM (long long int)
60 bkm_scale (__strtol_t
*x
, int scale_factor
)
62 if (TYPE_SIGNED (__strtol_t
) && *x
< STRTOL_T_MINIMUM
/ scale_factor
)
64 *x
= STRTOL_T_MINIMUM
;
65 return LONGINT_OVERFLOW
;
67 if (STRTOL_T_MAXIMUM
/ scale_factor
< *x
)
69 *x
= STRTOL_T_MAXIMUM
;
70 return LONGINT_OVERFLOW
;
77 bkm_scale_by_power (__strtol_t
*x
, int base
, int power
)
79 strtol_error err
= LONGINT_OK
;
81 err
|= bkm_scale (x
, base
);
88 __xstrtol (const char *s
, char **ptr
, int strtol_base
,
89 __strtol_t
*val
, const char *valid_suffixes
)
94 strtol_error err
= LONGINT_OK
;
96 assure (0 <= strtol_base
&& strtol_base
<= 36);
98 p
= (ptr
? ptr
: &t_ptr
);
102 if (! TYPE_SIGNED (__strtol_t
))
105 unsigned char ch
= *q
;
109 return LONGINT_INVALID
;
112 tmp
= __strtol (s
, p
, strtol_base
);
116 /* If there is no number but there is a valid suffix, assume the
117 number is 1. The string is invalid otherwise. */
118 if (valid_suffixes
&& **p
&& strchr (valid_suffixes
, **p
))
121 return LONGINT_INVALID
;
126 return LONGINT_INVALID
;
127 err
= LONGINT_OVERFLOW
;
130 /* Let valid_suffixes == NULL mean "allow any suffix". */
131 /* FIXME: update all callers except the ones that allow suffixes
132 after the number, changing last parameter NULL to "". */
143 strtol_error overflow
;
145 if (!strchr (valid_suffixes
, **p
))
148 return err
| LONGINT_INVALID_SUFFIX_CHAR
;
153 case 'E': case 'G': case 'g': case 'k': case 'K': case 'M': case 'm':
154 case 'P': case 'T': case 't': case 'Y': case 'Z':
156 /* The "valid suffix" '0' is a special flag meaning that
157 an optional second suffix is allowed, which can change
158 the base. A suffix "B" (e.g. "100MB") stands for a power
159 of 1000, whereas a suffix "iB" (e.g. "100MiB") stands for
160 a power of 1024. If no suffix (e.g. "100M"), assume
163 if (strchr (valid_suffixes
, '0'))
172 case 'D': /* 'D' is obsolescent */
182 overflow
= bkm_scale (&tmp
, 512);
186 /* This obsolescent first suffix is distinct from the 'B'
187 second suffix above. E.g., 'tar -L 1000B' means change
188 the tape after writing 1000 KiB of data. */
189 overflow
= bkm_scale (&tmp
, 1024);
193 overflow
= LONGINT_OK
;
196 case 'E': /* exa or exbi */
197 overflow
= bkm_scale_by_power (&tmp
, base
, 6);
200 case 'G': /* giga or gibi */
201 case 'g': /* 'g' is undocumented; for compatibility only */
202 overflow
= bkm_scale_by_power (&tmp
, base
, 3);
207 overflow
= bkm_scale_by_power (&tmp
, base
, 1);
210 case 'M': /* mega or mebi */
211 case 'm': /* 'm' is undocumented; for compatibility only */
212 overflow
= bkm_scale_by_power (&tmp
, base
, 2);
215 case 'P': /* peta or pebi */
216 overflow
= bkm_scale_by_power (&tmp
, base
, 5);
219 case 'T': /* tera or tebi */
220 case 't': /* 't' is undocumented; for compatibility only */
221 overflow
= bkm_scale_by_power (&tmp
, base
, 4);
225 overflow
= bkm_scale (&tmp
, 2);
228 case 'Y': /* yotta or 2**80 */
229 overflow
= bkm_scale_by_power (&tmp
, base
, 8);
232 case 'Z': /* zetta or 2**70 */
233 overflow
= bkm_scale_by_power (&tmp
, base
, 7);
238 return err
| LONGINT_INVALID_SUFFIX_CHAR
;
244 err
|= LONGINT_INVALID_SUFFIX_CHAR
;