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+/* Convert string representation of a number into an intmax_t value.
+
+ Copyright (C) 1999, 2001-2004, 2006, 2009-2021 Free Software Foundation,
+ Inc.
+
+ This file is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 3 of the
+ License, or (at your option) any later version.
+
+ This file 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 Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+/* Written by Paul Eggert. */
+
+#include <config.h>
+
+/* Verify interface. */
+#include <inttypes.h>
+
+#include <stdlib.h>
+
+#include "verify.h"
+
+#ifdef UNSIGNED
+# ifndef HAVE_DECL_STRTOULL
+"this configure-time declaration test was not run"
+# endif
+# if !HAVE_DECL_STRTOULL
+unsigned long long int strtoull (char const *, char **, int);
+# endif
+
+#else
+
+# ifndef HAVE_DECL_STRTOLL
+"this configure-time declaration test was not run"
+# endif
+# if !HAVE_DECL_STRTOLL
+long long int strtoll (char const *, char **, int);
+# endif
+#endif
+
+#ifdef UNSIGNED
+# define Int uintmax_t
+# define Strtoimax strtoumax
+# define Strtol strtoul
+# define Strtoll strtoull
+# define Unsigned unsigned
+#else
+# define Int intmax_t
+# define Strtoimax strtoimax
+# define Strtol strtol
+# define Strtoll strtoll
+# define Unsigned
+#endif
+
+Int
+Strtoimax (char const *ptr, char **endptr, int base)
+{
+ verify (sizeof (Int) == sizeof (Unsigned long int)
+ || sizeof (Int) == sizeof (Unsigned long long int));
+
+ if (sizeof (Int) != sizeof (Unsigned long int))
+ return Strtoll (ptr, endptr, base);
+
+ return Strtol (ptr, endptr, base);
+}