From 9043add656177eeac1491a73d2f3ab92bec0013c Mon Sep 17 00:00:00 2001
From: Benjamin Barenblat <bbaren@debian.org>
Date: Sat, 29 Dec 2018 14:31:27 -0500
Subject: Imported Upstream version 8.8.2

---
 theories/ZArith/BinIntDef.v | 29 ++++++++++++++++++++++++-----
 1 file changed, 24 insertions(+), 5 deletions(-)

(limited to 'theories/ZArith/BinIntDef.v')

diff --git a/theories/ZArith/BinIntDef.v b/theories/ZArith/BinIntDef.v
index 8c2e7d94..db4de0b9 100644
--- a/theories/ZArith/BinIntDef.v
+++ b/theories/ZArith/BinIntDef.v
@@ -1,10 +1,12 @@
 (* -*- coding: utf-8 -*- *)
 (************************************************************************)
-(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
-(* <O___,, *   INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2016     *)
+(*         *   The Coq Proof Assistant / The Coq Development Team       *)
+(*  v      *   INRIA, CNRS and contributors - Copyright 1999-2018       *)
+(* <O___,, *       (see CREDITS file for the list of authors)           *)
 (*   \VV/  **************************************************************)
-(*    //   *      This file is distributed under the terms of the       *)
-(*         *       GNU Lesser General Public License Version 2.1        *)
+(*    //   *    This file is distributed under the terms of the         *)
+(*         *     GNU Lesser General Public License Version 2.1          *)
+(*         *     (see LICENSE file for the text of the license)         *)
 (************************************************************************)
 
 Require Export BinNums.
@@ -299,6 +301,23 @@ Definition to_pos (z:Z) : positive :=
     | _ => 1%positive
   end.
 
+(** Conversion with a decimal representation for printing/parsing *)
+
+Definition of_uint (d:Decimal.uint) := of_N (Pos.of_uint d).
+
+Definition of_int (d:Decimal.int) :=
+  match d with
+  | Decimal.Pos d => of_uint d
+  | Decimal.Neg d => opp (of_uint d)
+  end.
+
+Definition to_int n :=
+  match n with
+  | 0 => Decimal.Pos Decimal.zero
+  | pos p => Decimal.Pos (Pos.to_uint p)
+  | neg p => Decimal.Neg (Pos.to_uint p)
+  end.
+
 (** ** Iteration of a function
 
     By convention, iterating a negative number of times is identity.
@@ -616,4 +635,4 @@ Definition lxor a b :=
    | neg a, neg b => of_N (N.lxor (Pos.pred_N a) (Pos.pred_N b))
  end.
 
-End Z.
\ No newline at end of file
+End Z.
-- 
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