From 1ede897a37e9a56d95189f085a9cd1ffac1127ea Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89milie=20Feral?= <emilie.feral@numworks.com>
Date: Fri, 6 Oct 2017 10:16:18 +0200
Subject: [PATCH] [poincare] Create a class undefined

Change-Id: I0d30b907179f38b77ed65136fddede6e16fb08e1
---
 poincare/Makefile                     |  1 +
 poincare/include/poincare.h           |  1 +
 poincare/include/poincare/undefined.h | 20 ++++++++++++++++
 poincare/src/addition.cpp             |  8 +++----
 poincare/src/multiplication.cpp       |  8 +++----
 poincare/src/undefined.cpp            | 33 +++++++++++++++++++++++++++
 6 files changed, 63 insertions(+), 8 deletions(-)
 create mode 100644 poincare/include/poincare/undefined.h
 create mode 100644 poincare/src/undefined.cpp

diff --git a/poincare/Makefile b/poincare/Makefile
index f154a804f..0c600a04d 100644
--- a/poincare/Makefile
+++ b/poincare/Makefile
@@ -77,6 +77,7 @@ objs += $(addprefix poincare/src/,\
   sum.o\
   symbol.o\
   tangent.o\
+  undefined.o\
   variable_context.o\
 )
 
diff --git a/poincare/include/poincare.h b/poincare/include/poincare.h
index 0d7a00c24..8ece7db33 100644
--- a/poincare/include/poincare.h
+++ b/poincare/include/poincare.h
@@ -67,6 +67,7 @@
 #include <poincare/sum.h>
 #include <poincare/symbol.h>
 #include <poincare/tangent.h>
+#include <poincare/undefined.h>
 #include <poincare/variable_context.h>
 
 #endif
diff --git a/poincare/include/poincare/undefined.h b/poincare/include/poincare/undefined.h
new file mode 100644
index 000000000..7f2dc3eac
--- /dev/null
+++ b/poincare/include/poincare/undefined.h
@@ -0,0 +1,20 @@
+#ifndef POINCARE_UNDEFINED_H
+#define POINCARE_UNDEFINED_H
+
+#include <poincare/static_hierarchy.h>
+
+namespace Poincare {
+
+class Undefined : public StaticHierarchy<0> {
+public:
+  Type type() const override;
+  Expression * clone() const override;
+private:
+  ExpressionLayout * privateCreateLayout(FloatDisplayMode floatDisplayMode, ComplexFormat complexFormat) const override;
+  Evaluation<float> * privateEvaluate(SinglePrecision p, Context& context, AngleUnit angleUnit) const override;
+  Evaluation<double> * privateEvaluate(DoublePrecision p, Context& context, AngleUnit angleUnit) const override;
+};
+
+}
+
+#endif
diff --git a/poincare/src/addition.cpp b/poincare/src/addition.cpp
index fda9245d5..fd82755fd 100644
--- a/poincare/src/addition.cpp
+++ b/poincare/src/addition.cpp
@@ -1,6 +1,7 @@
 #include <poincare/addition.h>
 #include <poincare/complex_matrix.h>
 #include <poincare/multiplication.h>
+#include <poincare/undefined.h>
 extern "C" {
 #include <assert.h>
 #include <stdlib.h>
@@ -28,11 +29,10 @@ void Addition::immediateSimplify() {
     if (o->type() == Type::Addition) {
       mergeOperands(static_cast<Addition *>(o));
       index = 0;
+    } else if (o->type() == Type::Undefined) {
+      replaceWith(new Undefined(), true);
+      return;
     }
-    /* if (o->type() == Type::Undefined) {
-     *   replaceWith(new Undefined(), true);
-     *   return;
-     * }*/
   }
   sortChildren();
   for (int i = 0; i < numberOfOperands()-1; i++) {
diff --git a/poincare/src/multiplication.cpp b/poincare/src/multiplication.cpp
index 66f333018..791044d3e 100644
--- a/poincare/src/multiplication.cpp
+++ b/poincare/src/multiplication.cpp
@@ -9,6 +9,7 @@ extern "C" {
 #include <poincare/addition.h>
 #include <poincare/power.h>
 #include <poincare/complex_matrix.h>
+#include <poincare/undefined.h>
 #include "layout/string_layout.h"
 #include "layout/horizontal_layout.h"
 #include "layout/parenthesis_layout.h"
@@ -79,11 +80,10 @@ void Multiplication::immediateSimplify() {
     } else if (o->type() == Type::Rational && static_cast<const Rational *>(o)->isZero()) {
       replaceWith(new Rational(Integer(0)), true);
       return;
+    } else if (o->type() == Type::Undefined) {
+      replaceWith(new Undefined(), true);
+      return;
     }
-    /* if (o->type() == Type::Undefined) {
-     *   replaceWith(new Undefined(), true);
-     *   return;
-     * }*/
   }
   /* Second loop, distribute addition */
   for (int i=0; i<numberOfOperands(); i++) {
diff --git a/poincare/src/undefined.cpp b/poincare/src/undefined.cpp
new file mode 100644
index 000000000..50bf6a150
--- /dev/null
+++ b/poincare/src/undefined.cpp
@@ -0,0 +1,33 @@
+#include <poincare/undefined.h>
+#include <poincare/complex.h>
+extern "C" {
+#include <math.h>
+}
+#include "layout/string_layout.h"
+
+namespace Poincare {
+
+Expression::Type Undefined::type() const {
+  return Type::Undefined;
+}
+
+Expression * Undefined::clone() const {
+  return new Undefined();
+}
+
+Evaluation<float> * Undefined::privateEvaluate(SinglePrecision p, Context& context, AngleUnit angleUnit) const {
+  return new Complex<float>(Complex<float>::Float(NAN));
+}
+
+Evaluation<double> * Undefined::privateEvaluate(DoublePrecision p, Context& context, AngleUnit angleUnit) const {
+  return new Complex<double>(Complex<double>::Float(NAN));
+}
+
+ExpressionLayout * Undefined::privateCreateLayout(FloatDisplayMode floatDisplayMode, ComplexFormat complexFormat) const {
+  char buffer[16];
+  int numberOfChars = Complex<float>::convertFloatToText(NAN, buffer, 16, 0, floatDisplayMode);
+  return new StringLayout(buffer, numberOfChars);
+}
+
+}
+