Initial CLD2 source upload.

git-svn-id: https://cld2.googlecode.com/svn/trunk@3 b252ecd4-b096-bf77-eb8e-91563289f87e

internal/fixunicodevalue.cc

@@ -0,0 +1,54 @@
+// Copyright 2013 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//
+// Routine that maps a Unicode code point to an interchange-valid one
+//
+
+#include "fixunicodevalue.h"
+#include "integral_types.h"
+
+namespace CLD2 {
+
+// Guarantees that the resulting output value is interchange valid
+//  00-FF; map to spaces or MS CP1252
+//  D800-DFFF; surrogates
+//  FDD0-FDEF; non-characters
+//  xxFFFE-xxFFFF; non-characters
+char32 FixUnicodeValue(char32 uv) {
+  uint32 uuv = static_cast<uint32>(uv);
+  if (uuv < 0x0100) {
+    return kMapFullMicrosoft1252OrSpace[uuv];
+  }
+  if (uuv < 0xD800) {
+    return uv;
+  }
+  if ((uuv & ~0x0F) == 0xFDD0) {              // non-characters
+    return 0xFFFD;
+  }
+  if ((uuv & ~0x0F) == 0xFDE0) {              // non-characters
+    return 0xFFFD;
+  }
+  if ((uuv & 0x00FFFE) == 0xFFFE) {           // non-characters
+    return 0xFFFD;
+  }
+  if ((0xE000 <= uuv) && (uuv <= 0x10FFFF))  {
+    return uv;
+  }
+  // surrogates and negative and > 0x10FFFF all land here
+  return 0xFFFD;
+}
+
+}       // End namespace CLD2
+