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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef AAPT_LOCALE_VALUE_H
     18 #define AAPT_LOCALE_VALUE_H
     19 
     20 #include <string>
     21 #include <vector>
     22 
     23 #include "androidfw/ResourceTypes.h"
     24 #include "androidfw/StringPiece.h"
     25 
     26 namespace aapt {
     27 
     28 /**
     29  * A convenience class to build and parse locales.
     30  */
     31 struct LocaleValue {
     32   char language[4];
     33   char region[4];
     34   char script[4];
     35   char variant[8];
     36 
     37   inline LocaleValue();
     38 
     39   /**
     40    * Initialize this LocaleValue from a config string.
     41    */
     42   bool InitFromFilterString(const android::StringPiece& config);
     43 
     44   /**
     45    * Initialize this LocaleValue from parts of a vector.
     46    */
     47   ssize_t InitFromParts(std::vector<std::string>::iterator iter,
     48                         std::vector<std::string>::iterator end);
     49 
     50   /**
     51    * Initialize this LocaleValue from a ResTable_config.
     52    */
     53   void InitFromResTable(const android::ResTable_config& config);
     54 
     55   /**
     56    * Set the locale in a ResTable_config from this LocaleValue.
     57    */
     58   void WriteTo(android::ResTable_config* out) const;
     59 
     60   inline int compare(const LocaleValue& other) const;
     61 
     62   inline bool operator<(const LocaleValue& o) const;
     63   inline bool operator<=(const LocaleValue& o) const;
     64   inline bool operator==(const LocaleValue& o) const;
     65   inline bool operator!=(const LocaleValue& o) const;
     66   inline bool operator>=(const LocaleValue& o) const;
     67   inline bool operator>(const LocaleValue& o) const;
     68 
     69  private:
     70   void set_language(const char* language);
     71   void set_region(const char* language);
     72   void set_script(const char* script);
     73   void set_variant(const char* variant);
     74 };
     75 
     76 //
     77 // Implementation
     78 //
     79 
     80 LocaleValue::LocaleValue() { memset(this, 0, sizeof(LocaleValue)); }
     81 
     82 int LocaleValue::compare(const LocaleValue& other) const {
     83   return memcmp(this, &other, sizeof(LocaleValue));
     84 }
     85 
     86 bool LocaleValue::operator<(const LocaleValue& o) const {
     87   return compare(o) < 0;
     88 }
     89 
     90 bool LocaleValue::operator<=(const LocaleValue& o) const {
     91   return compare(o) <= 0;
     92 }
     93 
     94 bool LocaleValue::operator==(const LocaleValue& o) const {
     95   return compare(o) == 0;
     96 }
     97 
     98 bool LocaleValue::operator!=(const LocaleValue& o) const {
     99   return compare(o) != 0;
    100 }
    101 
    102 bool LocaleValue::operator>=(const LocaleValue& o) const {
    103   return compare(o) >= 0;
    104 }
    105 
    106 bool LocaleValue::operator>(const LocaleValue& o) const {
    107   return compare(o) > 0;
    108 }
    109 
    110 }  // namespace aapt
    111 
    112 #endif  // AAPT_LOCALE_VALUE_H
    113