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authorJim Meyering <jim@meyering.net>1999-04-19 00:20:36 +0000
committerJim Meyering <jim@meyering.net>1999-04-19 00:20:36 +0000
commite5e1c6d4fd10baf10d670204212f5c57a299cd11 (patch)
tree585bc24236ff47821a3150f19809a6325cdbe93b /lib
parentd17b6bc300a55c9679ef2a76eb7117b4c76f64ea (diff)
downloadcoreutils-e5e1c6d4fd10baf10d670204212f5c57a299cd11.tar.xz
*** empty log message ***
Diffstat (limited to 'lib')
-rw-r--r--lib/xstrtoumax.c99
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
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+/* 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 */