diff options
Diffstat (limited to 'chromium/third_party/cld_3/src/src/script_span/fixunicodevalue.cc')
-rw-r--r-- | chromium/third_party/cld_3/src/src/script_span/fixunicodevalue.cc | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/chromium/third_party/cld_3/src/src/script_span/fixunicodevalue.cc b/chromium/third_party/cld_3/src/src/script_span/fixunicodevalue.cc new file mode 100644 index 00000000000..373e5ee696a --- /dev/null +++ b/chromium/third_party/cld_3/src/src/script_span/fixunicodevalue.cc @@ -0,0 +1,55 @@ +// 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 chrome_lang_id { +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 +} // End namespace chrome_lang_id |