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82 lines
2.1 KiB
C
82 lines
2.1 KiB
C
/* Convert string representation of a number into an uintmax_t value.
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Copyright 1999 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. */
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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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#ifndef PARAMS
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# if defined PROTOTYPES || defined __STDC__
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# define PARAMS(Args) Args
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# else
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# define PARAMS(Args) ()
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# endif
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#endif
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#ifndef HAVE_DECL_STRTOUL
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"this configure-time declaration test was not run"
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#endif
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#if !HAVE_DECL_STRTOUL
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unsigned long strtoul PARAMS ((char const *, char **, int));
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#endif
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#ifndef HAVE_DECL_STRTOULL
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"this configure-time declaration test was not run"
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#endif
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#if !HAVE_DECL_STRTOULL && HAVE_UNSIGNED_LONG_LONG
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unsigned long long strtoull PARAMS ((char const *, char **, int));
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#endif
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uintmax_t
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strtoumax (char const *ptr, char **endptr, int base)
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{
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#define USE_IF_EQUIVALENT(function) \
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if (sizeof (uintmax_t) == sizeof function (ptr, endptr, base)) \
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return function (ptr, endptr, base);
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#if HAVE_UNSIGNED_LONG_LONG
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USE_IF_EQUIVALENT (strtoull)
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#endif
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USE_IF_EQUIVALENT (strtoul)
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abort ();
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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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printf ("sizeof uintmax_t: %d\n", sizeof (uintmax_t));
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printf ("sizeof strtoull(): %d\n", sizeof strtoull(p, &endptr, 10));
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printf ("sizeof strtoul(): %d\n", sizeof strtoul(p, &endptr, 10));
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exit (0);
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}
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#endif
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