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author | Jim Meyering <jim@meyering.net> | 1999-04-19 00:20:36 +0000 |
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committer | Jim Meyering <jim@meyering.net> | 1999-04-19 00:20:36 +0000 |
commit | e5e1c6d4fd10baf10d670204212f5c57a299cd11 (patch) | |
tree | 585bc24236ff47821a3150f19809a6325cdbe93b | |
parent | d17b6bc300a55c9679ef2a76eb7117b4c76f64ea (diff) | |
download | coreutils-e5e1c6d4fd10baf10d670204212f5c57a299cd11.tar.xz |
*** empty log message ***
-rw-r--r-- | lib/xstrtoumax.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/lib/xstrtoumax.c b/lib/xstrtoumax.c new file mode 100644 index 000000000..40f0d783a --- /dev/null +++ b/lib/xstrtoumax.c @@ -0,0 +1,99 @@ +/* xstrtoumax.c -- A more useful interface to strtoumax. + Copyright 1999 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. */ + +/* Written by Paul Eggert. */ + +#if HAVE_CONFIG_H +# include <config.h> +#endif + +#if HAVE_STRTOUMAX +# define __strtol strtoumax +#else +# define __strtol my_strtoumax + + /* Define a temporary implementation, intended to hold the fort only + until glibc has an implementation of the C9x standard function + strtoumax. When glibc implements strtoumax, we can remove the + following function in favor of a replacement file strtoumax.c taken + from glibc. */ + +# if HAVE_INTTYPES_H +# include <inttypes.h> +# endif + +# if HAVE_STDLIB_H +# include <stdlib.h> +# endif + +# ifndef PARAMS +# if defined PROTOTYPES || defined __STDC__ +# define PARAMS(Args) Args +# else +# define PARAMS(Args) () +# endif +# endif + +static uintmax_t my_strtoumax PARAMS ((char const *, char **, int)); +#endif + +#define __strtol_t uintmax_t +#define __xstrtol xstrtoumax +#include "xstrtol.c" + +#if !HAVE_STRTOUMAX + +static uintmax_t +my_strtoumax (char const *ptr, char **endptr, int base) +{ +# define USE_IF_EQUIVALENT(function) \ + if (sizeof (uintmax_t) == sizeof function (ptr, endptr, base)) \ + return function (ptr, endptr, base); + + USE_IF_EQUIVALENT (strtoul) + +# if HAVE_STRTOULL + USE_IF_EQUIVALENT (strtoull) +# endif + +# if HAVE_STRTOUQ + USE_IF_EQUIVALENT (strtouq) +# endif + + { + /* An implementation with uintmax_t longer than long, but with no + known way to convert it. Do it by hand. Assume base 10. */ + uintmax_t n = 0; + int overflow = 0; + for (; '0' <= *ptr && *ptr <= '9'; ptr++) + { + uintmax_t n10 = n * 10; + int digit = *ptr - '0'; + overflow |= ! (n10 / 10 == n && n10 < n10 + digit); + n = n10 + digit; + } + if (endptr) + *endptr = (char *) ptr; + if (overflow) + { + errno = ERANGE; + n = (uintmax_t) -1; + } + return n; + } +} +#endif /* HAVE_STRTOUMAX */ |