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- /* A more useful interface to strtol.
- Copyright (C) 1995, 1996 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 2, 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, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
- /* Jim Meyering (meyering@na-net.ornl.gov) */
-
- #ifdef HAVE_CONFIG_H
- #include <config.h>
- #endif
-
- #ifdef STDC_HEADERS
- #include <stdlib.h>
- #endif
-
- #ifdef HAVE_STRING_H
- # include <string.h>
- #else
- # include <strings.h>
- # ifndef strchr
- # define strchr index
- # endif
- #endif
-
- #define NDEBUG
- #include <assert.h>
-
- #include <errno.h>
- #ifndef errno
- extern int errno;
- #endif
-
- #if HAVE_LIMITS_H
- # include <limits.h>
- #endif
-
- #ifndef ULONG_MAX
- # define ULONG_MAX ((unsigned long) ~(unsigned long) 0)
- #endif
-
- #ifndef LONG_MAX
- # define LONG_MAX ((long int) (ULONG_MAX >> 1))
- #endif
-
- #include "xstrtol.h"
-
- #define BKM_SCALE(x, scale_factor, error_return) \
- do \
- { \
- if ((x) > (double) __ZLONG_MAX / (scale_factor)) \
- return (error_return); \
- (x) *= (scale_factor); \
- } \
- while (0)
-
- __unsigned long int __strtol ();
-
- /* FIXME: comment. */
-
- strtol_error
- __xstrtol (s, ptr, base, val, valid_suffixes)
- const char *s;
- char **ptr;
- int base;
- __unsigned long int *val;
- const char *valid_suffixes;
- {
- char *t_ptr;
- char **p;
- __unsigned long int tmp;
-
- assert (0 <= base && base <= 36);
-
- p = (ptr ? ptr : &t_ptr);
-
- errno = 0;
- tmp = __strtol (s, p, base);
- if (errno != 0)
- return LONGINT_OVERFLOW;
- if (*p == s)
- return LONGINT_INVALID;
- if (!valid_suffixes)
- {
- if (**p == '\0')
- {
- *val = tmp;
- return LONGINT_OK;
- }
- else
- return LONGINT_INVALID_SUFFIX_CHAR;
- }
-
- if (**p != '\0' && strchr (valid_suffixes, **p))
- {
- switch (**p)
- {
- case 'b':
- BKM_SCALE (tmp, 512, LONGINT_OVERFLOW);
- ++(*p);
- break;
-
- case 'c':
- ++(*p);
- break;
-
- case 'B':
- case 'k':
- BKM_SCALE (tmp, 1024, LONGINT_OVERFLOW);
- ++(*p);
- break;
-
- case 'm':
- BKM_SCALE (tmp, 1024 * 1024, LONGINT_OVERFLOW);
- ++(*p);
- break;
-
- case 'w':
- BKM_SCALE (tmp, 2, LONGINT_OVERFLOW);
- ++(*p);
- break;
-
- default:
- return LONGINT_INVALID_SUFFIX_CHAR;
- break;
- }
- }
-
- *val = tmp;
- return LONGINT_OK;
- }
-
- #ifdef TESTING_XSTRTO
-
- #include <stdio.h>
- #include "error.h"
-
- char *program_name;
-
- int
- main (int argc, char** argv)
- {
- strtol_error s_err;
- int i;
-
- program_name = argv[0];
- for (i=1; i<argc; i++)
- {
- char *p;
- __unsigned long int val;
-
- s_err = __xstrtol (argv[i], &p, 0, &val, "bckmw");
- if (s_err == LONGINT_OK)
- {
- printf ("%s->%lu (%s)\n", argv[i], val, p);
- }
- else
- {
- STRTOL_FATAL_ERROR (argv[i], "arg", s_err);
- }
- }
- exit (0);
- }
- #endif /* TESTING_XSTRTO */
-