103 lines
2.5 KiB
C
103 lines
2.5 KiB
C
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/* Convert string representation of a number into an intmax_t value.
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Copyright 1999, 2001 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* Written by Paul Eggert. Modified by Chet Ramey for Bash. */
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#if HAVE_CONFIG_H
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# include <config.h>
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#endif
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#if HAVE_INTTYPES_H
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# include <inttypes.h>
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#endif
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#if HAVE_STDLIB_H
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# include <stdlib.h>
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#endif
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#include <stdc.h>
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/* Verify a requirement at compile-time (unlike assert, which is runtime). */
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#define verify(name, assertion) struct name { char a[(assertion) ? 1 : -1]; }
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#ifndef HAVE_DECL_STRTOL
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"this configure-time declaration test was not run"
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#endif
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#if !HAVE_DECL_STRTOL
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extern long strtol __P((const char *, char **, int));
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#endif
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#ifndef HAVE_DECL_STRTOLL
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"this configure-time declaration test was not run"
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#endif
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#if !HAVE_DECL_STRTOLL && HAVE_LONG_LONG
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extern long long strtoll __P((const char *, char **, int));
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#endif
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intmax_t
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strtoimax (ptr, endptr, base)
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const char *ptr;
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char **endptr;
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int base;
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{
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#if HAVE_LONG_LONG
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verify(size_is_that_of_long_or_long_long,
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(sizeof (intmax_t) == sizeof (long) ||
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sizeof (intmax_t) == sizeof (long long)));
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if (sizeof (intmax_t) != sizeof (long))
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return (strtoll (ptr, endptr, base));
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#else
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verify (size_is_that_of_long, sizeof (intmax_t) == sizeof (long));
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#endif
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return (strtol (ptr, endptr, base));
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}
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#ifdef TESTING
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# include <stdio.h>
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int
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main ()
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{
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char *p, *endptr;
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intmax_t x;
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#if HAVE_LONG_LONG
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long long y;
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#endif
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long z;
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printf ("sizeof intmax_t: %d\n", sizeof (intmax_t));
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#if HAVE_LONG_LONG
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printf ("sizeof long long: %d\n", sizeof (long long));
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#endif
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printf ("sizeof long: %d\n", sizeof (long));
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x = strtoimax("42", &endptr, 10);
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#if HAVE_LONG_LONG
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y = strtoll("42", &endptr, 10);
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#else
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y = -1;
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#endif
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z = strtol("42", &endptr, 10);
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printf ("%lld %lld %ld\n", x, y, z);
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exit (0);
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}
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#endif
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