1 files changed, 117 insertions, 0 deletions
diff --git a/src/mscorlib/src/System/Globalization/TextInfo.Unix.cs b/src/mscorlib/src/System/Globalization/TextInfo.Unix.cs
new file mode 100644
index 0000000000..f7f64c684a
--- /dev/null
+++ b/src/mscorlib/src/System/Globalization/TextInfo.Unix.cs
@@ -0,0 +1,117 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Diagnostics;
+using System.Diagnostics.Contracts;
+using System.Security;
+using System.Text;
+
+namespace System.Globalization
+{
+    public partial class TextInfo
+    {
+        [NonSerialized]
+        private Tristate _needsTurkishCasing = Tristate.NotInitialized;
+
+        private void FinishInitialization(string textInfoName)
+        {
+        }
+
+        private unsafe string ChangeCase(string s, bool toUpper)
+        {
+            Debug.Assert(!_invariantMode);
+
+            Debug.Assert(s != null);
+
+            if (s.Length == 0)
+            {
+                return string.Empty;
+            }
+
+            string result = string.FastAllocateString(s.Length);
+
+            fixed (char* pSource = s)
+            {
+                fixed (char* pResult = result)
+                {
+                    if (IsAsciiCasingSameAsInvariant && s.IsAscii())
+                    {
+                        int length = s.Length;
+                        char* a = pSource, b = pResult;
+                        if (toUpper)
+                        {
+                            while (length-- != 0)
+                            {
+                                *b++ = ToUpperAsciiInvariant(*a++);
+                            }
+                        }
+                        else
+                        {
+                            while (length-- != 0)
+                            {
+                                *b++ = ToLowerAsciiInvariant(*a++);
+                            }
+                        }
+                    }
+                    else
+                    {
+                        ChangeCase(pSource, s.Length, pResult, result.Length, toUpper);
+                    }
+                }
+            }
+
+            return result;
+        }
+
+        private unsafe char ChangeCase(char c, bool toUpper)
+        {
+            Debug.Assert(!_invariantMode);
+
+            char dst = default(char);
+
+            ChangeCase(&c, 1, &dst, 1, toUpper);
+
+            return dst;
+        }
+
+        // -----------------------------
+        // ---- PAL layer ends here ----
+        // -----------------------------
+
+        private bool NeedsTurkishCasing(string localeName)
+        {
+            Debug.Assert(localeName != null);
+
+            return CultureInfo.GetCultureInfo(localeName).CompareInfo.Compare("\u0131", "I", CompareOptions.IgnoreCase) == 0;
+        }
+
+        private bool IsInvariant { get { return _cultureName.Length == 0; } }
+
+        internal unsafe void ChangeCase(char* src, int srcLen, char* dstBuffer, int dstBufferCapacity, bool bToUpper)
+        {
+            Debug.Assert(!_invariantMode);
+
+            if (IsInvariant)
+            {
+                Interop.GlobalizationInterop.ChangeCaseInvariant(src, srcLen, dstBuffer, dstBufferCapacity, bToUpper);
+            }
+            else
+            {
+                if (_needsTurkishCasing == Tristate.NotInitialized)
+                {
+                    _needsTurkishCasing = NeedsTurkishCasing(_textInfoName) ? Tristate.True : Tristate.False;
+                }
+                if (_needsTurkishCasing == Tristate.True)
+                {
+                    Interop.GlobalizationInterop.ChangeCaseTurkish(src, srcLen, dstBuffer, dstBufferCapacity, bToUpper);
+                }
+                else
+                {
+                    Interop.GlobalizationInterop.ChangeCase(src, srcLen, dstBuffer, dstBufferCapacity, bToUpper);
+                }
+            }
+        }
+
+    }
+}