+++ /dev/null
-/* A more useful interface to strtol.
-
- Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2003, 2004, 2005,
- 2006, 2007 Free Software Foundation, Inc.
-
- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
-
-/* Written by Jim Meyering. */
-
-#ifndef __strtol
-# define __strtol strtol
-# define __strtol_t long int
-# define __xstrtol xstrtol
-# define STRTOL_T_MINIMUM LONG_MIN
-# define STRTOL_T_MAXIMUM LONG_MAX
-#endif
-
-#include <config.h>
-
-#include "xstrtol.h"
-
-/* Some pre-ANSI implementations (e.g. SunOS 4)
- need stderr defined if assertion checking is enabled. */
-#include <stdio.h>
-
-#include <assert.h>
-#include <ctype.h>
-#include <errno.h>
-#include <limits.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "intprops.h"
-
-static strtol_error
-bkm_scale (__strtol_t *x, int scale_factor)
-{
- if (TYPE_SIGNED (__strtol_t) && *x < STRTOL_T_MINIMUM / scale_factor)
- {
- *x = STRTOL_T_MINIMUM;
- return LONGINT_OVERFLOW;
- }
- if (STRTOL_T_MAXIMUM / scale_factor < *x)
- {
- *x = STRTOL_T_MAXIMUM;
- return LONGINT_OVERFLOW;
- }
- *x *= scale_factor;
- return LONGINT_OK;
-}
-
-static strtol_error
-bkm_scale_by_power (__strtol_t *x, int base, int power)
-{
- strtol_error err = LONGINT_OK;
- while (power--)
- err |= bkm_scale (x, base);
- return err;
-}
-
-/* FIXME: comment. */
-
-strtol_error
-__xstrtol (const char *s, char **ptr, int strtol_base,
- __strtol_t *val, const char *valid_suffixes)
-{
- char *t_ptr;
- char **p;
- __strtol_t tmp;
- strtol_error err = LONGINT_OK;
-
- assert (0 <= strtol_base && strtol_base <= 36);
-
- p = (ptr ? ptr : &t_ptr);
-
- if (! TYPE_SIGNED (__strtol_t))
- {
- const char *q = s;
- unsigned char ch = *q;
- while (isspace (ch))
- ch = *++q;
- if (ch == '-')
- return LONGINT_INVALID;
- }
-
- errno = 0;
- tmp = __strtol (s, p, strtol_base);
-
- if (*p == s)
- {
- /* If there is no number but there is a valid suffix, assume the
- number is 1. The string is invalid otherwise. */
- if (valid_suffixes && **p && strchr (valid_suffixes, **p))
- tmp = 1;
- else
- return LONGINT_INVALID;
- }
- else if (errno != 0)
- {
- if (errno != ERANGE)
- return LONGINT_INVALID;
- err = LONGINT_OVERFLOW;
- }
-
- /* Let valid_suffixes == NULL mean `allow any suffix'. */
- /* FIXME: update all callers except the ones that allow suffixes
- after the number, changing last parameter NULL to `""'. */
- if (!valid_suffixes)
- {
- *val = tmp;
- return err;
- }
-
- if (**p != '\0')
- {
- int base = 1024;
- int suffixes = 1;
- strtol_error overflow;
-
- if (!strchr (valid_suffixes, **p))
- {
- *val = tmp;
- return err | LONGINT_INVALID_SUFFIX_CHAR;
- }
-
- if (strchr (valid_suffixes, '0'))
- {
- /* The ``valid suffix'' '0' is a special flag meaning that
- an optional second suffix is allowed, which can change
- the base. A suffix "B" (e.g. "100MB") stands for a power
- of 1000, whereas a suffix "iB" (e.g. "100MiB") stands for
- a power of 1024. If no suffix (e.g. "100M"), assume
- power-of-1024. */
-
- switch (p[0][1])
- {
- case 'i':
- if (p[0][2] == 'B')
- suffixes += 2;
- break;
-
- case 'B':
- case 'D': /* 'D' is obsolescent */
- base = 1000;
- suffixes++;
- break;
- }
- }
-
- switch (**p)
- {
- case 'b':
- overflow = bkm_scale (&tmp, 512);
- break;
-
- case 'B':
- overflow = bkm_scale (&tmp, 1024);
- break;
-
- case 'c':
- overflow = 0;
- break;
-
- case 'E': /* exa or exbi */
- overflow = bkm_scale_by_power (&tmp, base, 6);
- break;
-
- case 'G': /* giga or gibi */
- case 'g': /* 'g' is undocumented; for compatibility only */
- overflow = bkm_scale_by_power (&tmp, base, 3);
- break;
-
- case 'k': /* kilo */
- case 'K': /* kibi */
- overflow = bkm_scale_by_power (&tmp, base, 1);
- break;
-
- case 'M': /* mega or mebi */
- case 'm': /* 'm' is undocumented; for compatibility only */
- overflow = bkm_scale_by_power (&tmp, base, 2);
- break;
-
- case 'P': /* peta or pebi */
- overflow = bkm_scale_by_power (&tmp, base, 5);
- break;
-
- case 'T': /* tera or tebi */
- case 't': /* 't' is undocumented; for compatibility only */
- overflow = bkm_scale_by_power (&tmp, base, 4);
- break;
-
- case 'w':
- overflow = bkm_scale (&tmp, 2);
- break;
-
- case 'Y': /* yotta or 2**80 */
- overflow = bkm_scale_by_power (&tmp, base, 8);
- break;
-
- case 'Z': /* zetta or 2**70 */
- overflow = bkm_scale_by_power (&tmp, base, 7);
- break;
-
- default:
- *val = tmp;
- return err | LONGINT_INVALID_SUFFIX_CHAR;
- }
-
- err |= overflow;
- *p += suffixes;
- if (**p)
- err |= LONGINT_INVALID_SUFFIX_CHAR;
- }
-
- *val = tmp;
- return err;
-}
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