From 217083155365616a0bb5d7f5f9cc6151b3d90819 Mon Sep 17 00:00:00 2001
From: Luciano Ciccariello <xeeynamo@hotmail.com>
Date: Sun, 18 Aug 2019 23:23:01 +0100
Subject: [PATCH] Add some characters to International CTD encoder

---
 .../Internals/InternationalCtdEncoder.cs      | 12 +++++++
 OpenKh.Tests/Bbs/CtdEncodingTests.cs          | 34 ++++++++++++++-----
 2 files changed, 37 insertions(+), 9 deletions(-)

diff --git a/OpenKh.Bbs/Messages/Internals/InternationalCtdEncoder.cs b/OpenKh.Bbs/Messages/Internals/InternationalCtdEncoder.cs
index f4ec09683..36b15e55f 100644
--- a/OpenKh.Bbs/Messages/Internals/InternationalCtdEncoder.cs
+++ b/OpenKh.Bbs/Messages/Internals/InternationalCtdEncoder.cs
@@ -9,6 +9,8 @@ internal class InternationalCtdEncoder : ICtdMessageEncoder
     {
         private static readonly string _mapping0 =
             " !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[¥]^_`abcdefghijklmnopqrstuvwxyz{|}~";
+        private static readonly string _mapping99 =
+            "ÀÁÂÄÆÇÈÉÊËÌÍÎÏÑÒÓÔÕÖŒÙÚÛÜßàáâäæçèéêëìíîïñòóôõöùúûüœ¿¡";
 
         private static readonly Dictionary<char, int> _inverseMapping = _mapping0
             .Select((x, i) => new { Ch = x, Data = i + 0x20 })
@@ -43,9 +45,19 @@ private static char GetCharacter(byte[] data, ref int index)
         {
             var ch = data[index++];
 
+            if (ch >= 0x00 && ch < 0x20)
+                return (char)ch;
+
             if (ch >= 0x20 && ch < 0x80)
                 return _mapping0[ch - 0x20];
 
+            var ch2 = data[index++];
+            switch (ch)
+            {
+                case 0x99:
+                    return _mapping99[ch2 - 0x80];
+            }
+
             throw new Exception($"Data {ch:X02} cannot be decoded.");
         }
     }
diff --git a/OpenKh.Tests/Bbs/CtdEncodingTests.cs b/OpenKh.Tests/Bbs/CtdEncodingTests.cs
index 37831bd65..6fb0e4dba 100644
--- a/OpenKh.Tests/Bbs/CtdEncodingTests.cs
+++ b/OpenKh.Tests/Bbs/CtdEncodingTests.cs
@@ -11,25 +11,41 @@ public class CtdEncodingTests
         [Theory]
         [InlineData(' ', 0x20)]
         [InlineData('A', 0x41)]
-        public void InternationalEncodingTest(char ch, byte expected, byte? expected2 = null)
+        [InlineData('~', 0x7e)]
+        public void InternationalEncodingSimpleTest(char ch, byte expected)
         {
             var actual = euEnc.Encode($"{ch}");
             Assert.Equal(expected, actual[0]);
-            if (expected2.HasValue)
-                Assert.Equal(expected2, actual[1]);
+        }
+
+        [Theory]
+        [InlineData('Ò', 0x99, 0x8f)]
+        [InlineData('ç', 0x99, 0x9f)]
+        [InlineData('ú', 0x99, 0xaf)]
+        public void InternationalEncodingExtTest(char ch, byte expected, byte expected2)
+        {
+            var actual = euEnc.Encode($"{ch}");
+            Assert.Equal(expected, actual[0]);
+            Assert.Equal(expected2, actual[1]);
         }
 
         [Theory]
         [InlineData(' ', 0x20)]
         [InlineData('A', 0x41)]
-        public void InternationalDecodingTest(char expected, byte ch, byte? ch2 = null)
+        [InlineData('~', 0x7e)]
+        public void InternationalDecodingSimpleTest(char expected, byte ch)
         {
-            string actual;
-            if (ch2.HasValue)
-                actual = euDec.Decode(new byte[] { ch, ch2.Value });
-            else
-                actual = euDec.Decode(new byte[] { ch });
+            string actual = euDec.Decode(new byte[] { ch });
+            Assert.Equal(expected, actual[0]);
+        }
 
+        [Theory]
+        [InlineData('Ò', 0x99, 0x8f)]
+        [InlineData('ç', 0x99, 0x9f)]
+        [InlineData('ú', 0x99, 0xaf)]
+        public void InternationalDecodingExtTest(char expected, byte ch, byte ch2)
+        {
+            string actual = euDec.Decode(new byte[] { ch, ch2 });
             Assert.Equal(expected, actual[0]);
         }
     }