| /** |
| * Copyright 2010 Google Inc. |
| * |
| * 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. |
| */ |
| |
| // Author: Shawn Ligocki |
| |
| #include "phonenumbers/utf/unilib.h" |
| |
| #include "phonenumbers/base/basictypes.h" |
| #include "phonenumbers/utf/utf.h" |
| |
| namespace i18n { |
| namespace phonenumbers { |
| namespace UniLib { |
| |
| namespace { |
| |
| // MOE: start_strip |
| // MOE: end_strip |
| // Codepoints not allowed for interchange are: |
| // C0 (ASCII) controls: U+0000 to U+001F excluding Space (SP, U+0020), |
| // Horizontal Tab (HT, U+0009), Line-Feed (LF, U+000A), |
| // Form Feed (FF, U+000C) and Carriage-Return (CR, U+000D) |
| // C1 controls: U+007F to U+009F |
| // Surrogates: U+D800 to U+DFFF |
| // Non-characters: U+FDD0 to U+FDEF and U+xxFFFE to U+xxFFFF for all xx |
| inline bool IsInterchangeValidCodepoint(char32 c) { |
| return !((c >= 0x00 && c <= 0x08) || c == 0x0B || (c >= 0x0E && c <= 0x1F) || |
| (c >= 0x7F && c <= 0x9F) || |
| (c >= 0xD800 && c <= 0xDFFF) || |
| (c >= 0xFDD0 && c <= 0xFDEF) || (c&0xFFFE) == 0xFFFE); |
| } |
| |
| } // namespace |
| |
| int SpanInterchangeValid(const char* begin, int byte_length) { |
| char32 rune; |
| const char* p = begin; |
| const char* end = begin + byte_length; |
| while (p < end) { |
| int bytes_consumed = charntorune(&rune, p, end - p); |
| // We want to accept Runeerror == U+FFFD as a valid char, but it is used |
| // by chartorune to indicate error. Luckily, the real codepoint is size 3 |
| // while errors return bytes_consumed == 1. |
| if ((rune == Runeerror && bytes_consumed == 1) || |
| !IsInterchangeValidCodepoint(rune)) { |
| break; // Found |
| } |
| p += bytes_consumed; |
| } |
| return p - begin; |
| } |
| |
| } // namespace UniLib |
| } // namespace phonenumbers |
| } // namespace i18n |