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+/* mpf_fits_s*_p -- test whether an mpf fits a C signed type.
+
+Copyright 2001, 2002, 2014 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP Library is free software; you can redistribute it and/or modify
+it under the terms of either:
+
+ * 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.
+
+or
+
+ * the GNU General Public License as published by the Free Software
+ Foundation; either version 2 of the License, or (at your option) any
+ later version.
+
+or both in parallel, as here.
+
+The GNU MP Library 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 copies of the GNU General Public License and the
+GNU Lesser General Public License along with the GNU MP Library. If not,
+see https://www.gnu.org/licenses/. */
+
+#include "gmp-impl.h"
+
+
+/* Notice this is equivalent to mpz_set_f + mpz_fits_s*_p. */
+
+int
+FUNCTION (mpf_srcptr f) __GMP_NOTHROW
+{
+ mp_size_t fs, fn;
+ mp_srcptr fp;
+ mp_exp_t exp;
+ mp_limb_t fl;
+
+ exp = EXP(f);
+ if (exp < 1)
+ return 1; /* -1 < f < 1 truncates to zero, so fits */
+
+ fs = SIZ (f);
+ fp = PTR(f);
+ fn = ABS (fs);
+
+ if (exp == 1)
+ {
+ fl = fp[fn-1];
+ }
+#if GMP_NAIL_BITS != 0
+ else if (exp == 2 && MAXIMUM > GMP_NUMB_MAX)
+ {
+ fl = fp[fn-1];
+ if ((fl >> GMP_NAIL_BITS) != 0)
+ return 0;
+ fl = (fl << GMP_NUMB_BITS);
+ if (fn >= 2)
+ fl |= fp[fn-2];
+ }
+#endif
+ else
+ return 0;
+
+ return fl <= (fs >= 0 ? (mp_limb_t) MAXIMUM : NEG_CAST (mp_limb_t, MINIMUM));
+}