101 lines
2.7 KiB
C
101 lines
2.7 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. */
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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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/* 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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#ifdef UNSIGNED
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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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#else
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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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long strtol PARAMS ((char const *, 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_UNSIGNED_LONG_LONG
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long long strtoll PARAMS ((char const *, char **, int));
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# endif
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#endif
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#ifdef UNSIGNED
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# undef HAVE_LONG_LONG
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# define HAVE_LONG_LONG HAVE_UNSIGNED_LONG_LONG
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# define INT uintmax_t
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# define strtoimax strtoumax
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# define strtol strtoul
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# define strtoll strtoull
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#else
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# define INT intmax_t
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#endif
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INT
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strtoimax (char const *ptr, char **endptr, 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 (INT) == sizeof (long)
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|| sizeof (INT) == sizeof (long long)));
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if (sizeof (INT) != 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,
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sizeof (INT) == sizeof (long));
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#endif
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return strtol (ptr, endptr, base);
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}
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