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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_CONFIG_DESCRIPTION_H
     18 #define AAPT_CONFIG_DESCRIPTION_H
     19 
     20 #include "util/StringPiece.h"
     21 
     22 #include <androidfw/ResourceTypes.h>
     23 #include <ostream>
     24 
     25 namespace aapt {
     26 
     27 /*
     28  * Subclass of ResTable_config that adds convenient
     29  * initialization and comparison methods.
     30  */
     31 struct ConfigDescription : public android::ResTable_config {
     32     /**
     33      * Returns an immutable default config.
     34      */
     35     static const ConfigDescription& defaultConfig();
     36 
     37     /*
     38      * Parse a string of the form 'fr-sw600dp-land' and fill in the
     39      * given ResTable_config with resulting configuration parameters.
     40      *
     41      * The resulting configuration has the appropriate sdkVersion defined
     42      * for backwards compatibility.
     43      */
     44     static bool parse(const StringPiece& str, ConfigDescription* out = nullptr);
     45 
     46     /**
     47      * If the configuration uses an axis that was added after
     48      * the original Android release, make sure the SDK version
     49      * is set accordingly.
     50      */
     51     static void applyVersionForCompatibility(ConfigDescription* config);
     52 
     53     ConfigDescription();
     54     ConfigDescription(const android::ResTable_config& o);
     55     ConfigDescription(const ConfigDescription& o);
     56     ConfigDescription(ConfigDescription&& o);
     57 
     58     ConfigDescription& operator=(const android::ResTable_config& o);
     59     ConfigDescription& operator=(const ConfigDescription& o);
     60     ConfigDescription& operator=(ConfigDescription&& o);
     61 
     62     bool operator<(const ConfigDescription& o) const;
     63     bool operator<=(const ConfigDescription& o) const;
     64     bool operator==(const ConfigDescription& o) const;
     65     bool operator!=(const ConfigDescription& o) const;
     66     bool operator>=(const ConfigDescription& o) const;
     67     bool operator>(const ConfigDescription& o) const;
     68 };
     69 
     70 inline ConfigDescription::ConfigDescription() {
     71     memset(this, 0, sizeof(*this));
     72     size = sizeof(android::ResTable_config);
     73 }
     74 
     75 inline ConfigDescription::ConfigDescription(const android::ResTable_config& o) {
     76     *static_cast<android::ResTable_config*>(this) = o;
     77     size = sizeof(android::ResTable_config);
     78 }
     79 
     80 inline ConfigDescription::ConfigDescription(const ConfigDescription& o) {
     81     *static_cast<android::ResTable_config*>(this) = o;
     82 }
     83 
     84 inline ConfigDescription::ConfigDescription(ConfigDescription&& o) {
     85     *this = o;
     86 }
     87 
     88 inline ConfigDescription& ConfigDescription::operator=(const android::ResTable_config& o) {
     89     *static_cast<android::ResTable_config*>(this) = o;
     90     size = sizeof(android::ResTable_config);
     91     return *this;
     92 }
     93 
     94 inline ConfigDescription& ConfigDescription::operator=(const ConfigDescription& o) {
     95     *static_cast<android::ResTable_config*>(this) = o;
     96     return *this;
     97 }
     98 
     99 inline ConfigDescription& ConfigDescription::operator=(ConfigDescription&& o) {
    100     *this = o;
    101     return *this;
    102 }
    103 
    104 inline bool ConfigDescription::operator<(const ConfigDescription& o) const {
    105     return compare(o) < 0;
    106 }
    107 
    108 inline bool ConfigDescription::operator<=(const ConfigDescription& o) const {
    109     return compare(o) <= 0;
    110 }
    111 
    112 inline bool ConfigDescription::operator==(const ConfigDescription& o) const {
    113     return compare(o) == 0;
    114 }
    115 
    116 inline bool ConfigDescription::operator!=(const ConfigDescription& o) const {
    117     return compare(o) != 0;
    118 }
    119 
    120 inline bool ConfigDescription::operator>=(const ConfigDescription& o) const {
    121     return compare(o) >= 0;
    122 }
    123 
    124 inline bool ConfigDescription::operator>(const ConfigDescription& o) const {
    125     return compare(o) > 0;
    126 }
    127 
    128 inline ::std::ostream& operator<<(::std::ostream& out, const ConfigDescription& o) {
    129     return out << o.toString().string();
    130 }
    131 
    132 } // namespace aapt
    133 
    134 #endif // AAPT_CONFIG_DESCRIPTION_H
    135