philip.liard@gmail.com | b905691 | 2011-08-18 11:41:24 +0000 | [diff] [blame] | 1 | // Copyright (C) 2011 The Libphonenumber Authors |
philip.liard@gmail.com | 1ad5e5b | 2011-07-01 08:22:06 +0000 | [diff] [blame] | 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | #ifndef I18N_PHONENUMBERS_ENCODING_UTILS_H_ |
| 16 | #define I18N_PHONENUMBERS_ENCODING_UTILS_H_ |
| 17 | |
philip.liard@gmail.com | af4a2ce | 2013-04-30 11:35:55 +0000 | [diff] [blame] | 18 | #include "phonenumbers/base/basictypes.h" |
philip.liard@gmail.com | 6a0a07f | 2011-09-21 17:43:54 +0000 | [diff] [blame] | 19 | #include "phonenumbers/utf/unilib.h" |
philip.liard@gmail.com | 1ad5e5b | 2011-07-01 08:22:06 +0000 | [diff] [blame] | 20 | #include "phonenumbers/utf/utf.h" |
| 21 | |
| 22 | namespace i18n { |
| 23 | namespace phonenumbers { |
| 24 | |
| 25 | class EncodingUtils { |
| 26 | public: |
| 27 | // Decodes one Unicode code-point value from a UTF-8 array. Returns the number |
| 28 | // of bytes read from the array. If the array does not contain valid UTF-8, |
| 29 | // the function stores 0xFFFD in the output variable and returns 1. |
| 30 | static inline int DecodeUTF8Char(const char* in, char32* out) { |
| 31 | Rune r; |
| 32 | int len = chartorune(&r, in); |
| 33 | *out = r; |
| 34 | return len; |
| 35 | } |
philip.liard@gmail.com | 6a0a07f | 2011-09-21 17:43:54 +0000 | [diff] [blame] | 36 | |
| 37 | static const char* AdvanceOneUTF8Character(const char* buf_utf8) { |
| 38 | return buf_utf8 + UniLib::OneCharLen(buf_utf8); |
| 39 | } |
| 40 | |
| 41 | static const char* BackUpOneUTF8Character(const char* start, |
| 42 | const char* end) { |
| 43 | while (start < end && UniLib::IsTrailByte(*--end)) {} |
| 44 | return end; |
| 45 | } |
philip.liard@gmail.com | 1ad5e5b | 2011-07-01 08:22:06 +0000 | [diff] [blame] | 46 | }; |
| 47 | |
| 48 | } // namespace phonenumbers |
| 49 | } // namespace i18n |
| 50 | |
| 51 | #endif // I18N_PHONENUMBERS_ENCODING_UTILS_H_ |