From 8ec29ea849c9b416ce3fd0f84f47d9bc9fc6a004 Mon Sep 17 00:00:00 2001
From: Karl Hallsby <karl@hallsby.com>
Date: Wed, 6 Jan 2021 11:15:38 -0600
Subject: [PATCH] octave.pkgs.interval: init at 3.2.0

---
 .../octave-modules/interval/default.nix       | 39 +++++++++++++++++++
 pkgs/top-level/octave-packages.nix            |  2 +
 2 files changed, 41 insertions(+)
 create mode 100644 pkgs/development/octave-modules/interval/default.nix

diff --git a/pkgs/development/octave-modules/interval/default.nix b/pkgs/development/octave-modules/interval/default.nix
new file mode 100644
index 000000000000..0891a6143852
--- /dev/null
+++ b/pkgs/development/octave-modules/interval/default.nix
@@ -0,0 +1,39 @@
+{ buildOctavePackage
+, lib
+, fetchurl
+, mpfr
+}:
+
+buildOctavePackage rec {
+  pname = "interval";
+  version = "3.2.0";
+
+  src = fetchurl {
+    url = "mirror://sourceforge/octave/${pname}-${version}.tar.gz";
+    sha256 = "0a0sz7b4y53qgk1xr4pannn4w7xiin2pf74x7r54hrr1wf4abp20";
+  };
+
+  propagatedBuildInputs = [
+    mpfr
+  ];
+
+  meta = with lib; {
+    homepage = "https://octave.sourceforge.io/interval/index.html";
+    license = licenses.gpl3Plus;
+    maintainers = with maintainers; [ KarlJoad ];
+    description = "Interval arithmetic to evaluate functions over subsets of their domain";
+    longDescription = ''
+       The interval package for real-valued interval arithmetic allows one to
+       evaluate functions over subsets of their domain. All results are verified,
+       because interval computations automatically keep track of any errors.
+
+       These concepts can be used to handle uncertainties, estimate arithmetic
+       errors and produce reliable results. Also it can be applied to
+       computer-assisted proofs, constraint programming, and verified computing.
+
+       The implementation is based on interval boundaries represented by
+       binary64 numbers and is conforming to IEEE Std 1788-2015, IEEE standard
+       for interval arithmetic.
+    '';
+  };
+}
diff --git a/pkgs/top-level/octave-packages.nix b/pkgs/top-level/octave-packages.nix
index 6094771842e4..61783fed750a 100644
--- a/pkgs/top-level/octave-packages.nix
+++ b/pkgs/top-level/octave-packages.nix
@@ -121,6 +121,8 @@ makeScope newScope (self:
       inherit (octave) enableJava;
     };
 
+    interval = callPackage ../development/octave-modules/interval { };
+
     level-set = callPackage ../development/octave-modules/level-set { };
 
     linear-algebra = callPackage ../development/octave-modules/linear-algebra { };