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// 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
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