Virgin import of diffutils 2.8.7.

contrib/diff/lib/strtoimax.c

@@ -0,0 +1,80 @@
+/* Convert string representation of a number into an intmax_t value.
+   Copyright (C) 1999, 2001, 2002, 2003 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_INTTYPES_H
+# include <inttypes.h>
+#elif HAVE_STDINT_H
+# include <stdint.h>
+#endif
+
+#include <stdlib.h>
+
+/* Verify a requirement at compile-time (unlike assert, which is runtime).  */
+#define verify(name, assertion) struct name { char a[(assertion) ? 1 : -1]; }
+
+#ifdef UNSIGNED
+# ifndef HAVE_DECL_STRTOULL
+"this configure-time declaration test was not run"
+# endif
+# if !HAVE_DECL_STRTOULL && HAVE_UNSIGNED_LONG_LONG
+unsigned long long strtoull (char const *, char **, int);
+# endif
+
+#else
+
+# ifndef HAVE_DECL_STRTOLL
+"this configure-time declaration test was not run"
+# endif
+# if !HAVE_DECL_STRTOLL && HAVE_UNSIGNED_LONG_LONG
+long long strtoll (char const *, char **, int);
+# endif
+#endif
+
+#ifdef UNSIGNED
+# undef HAVE_LONG_LONG
+# define HAVE_LONG_LONG HAVE_UNSIGNED_LONG_LONG
+# define INT uintmax_t
+# define strtoimax strtoumax
+# define strtol strtoul
+# define strtoll strtoull
+#else
+# define INT intmax_t
+#endif
+
+INT
+strtoimax (char const *ptr, char **endptr, int base)
+{
+#if HAVE_LONG_LONG
+  verify (size_is_that_of_long_or_long_long,
+	  (sizeof (INT) == sizeof (long)
+	   || sizeof (INT) == sizeof (long long)));
+
+  if (sizeof (INT) != sizeof (long))
+    return strtoll (ptr, endptr, base);
+#else
+  verify (size_is_that_of_long,
+	  sizeof (INT) == sizeof (long));
+#endif
+
+  return strtol (ptr, endptr, base);
+}