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/*
* Copyright (C) 2015 The Android Open Source Project
*
* 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.
*/
#include "Locale.h"
#include "util/Util.h"
#include <algorithm>
#include <ctype.h>
#include <string>
#include <vector>
namespace aapt {
using android::ResTable_config;
void LocaleValue::setLanguage(const char* languageChars) {
size_t i = 0;
while ((*languageChars) != '\0') {
language[i++] = ::tolower(*languageChars);
languageChars++;
}
}
void LocaleValue::setRegion(const char* regionChars) {
size_t i = 0;
while ((*regionChars) != '\0') {
region[i++] = ::toupper(*regionChars);
regionChars++;
}
}
void LocaleValue::setScript(const char* scriptChars) {
size_t i = 0;
while ((*scriptChars) != '\0') {
if (i == 0) {
script[i++] = ::toupper(*scriptChars);
} else {
script[i++] = ::tolower(*scriptChars);
}
scriptChars++;
}
}
void LocaleValue::setVariant(const char* variantChars) {
size_t i = 0;
while ((*variantChars) != '\0') {
variant[i++] = *variantChars;
variantChars++;
}
}
static inline bool isAlpha(const std::string& str) {
return std::all_of(std::begin(str), std::end(str), ::isalpha);
}
static inline bool isNumber(const std::string& str) {
return std::all_of(std::begin(str), std::end(str), ::isdigit);
}
bool LocaleValue::initFromFilterString(const StringPiece& str) {
// A locale (as specified in the filter) is an underscore separated name such
// as "en_US", "en_Latn_US", or "en_US_POSIX".
std::vector<std::string> parts = util::splitAndLowercase(str, '_');
const int numTags = parts.size();
bool valid = false;
if (numTags >= 1) {
const std::string& lang = parts[0];
if (isAlpha(lang) && (lang.length() == 2 || lang.length() == 3)) {
setLanguage(lang.c_str());
valid = true;
}
}
if (!valid || numTags == 1) {
return valid;
}
// At this point, valid == true && numTags > 1.
const std::string& part2 = parts[1];
if ((part2.length() == 2 && isAlpha(part2)) ||
(part2.length() == 3 && isNumber(part2))) {
setRegion(part2.c_str());
} else if (part2.length() == 4 && isAlpha(part2)) {
setScript(part2.c_str());
} else if (part2.length() >= 4 && part2.length() <= 8) {
setVariant(part2.c_str());
} else {
valid = false;
}
if (!valid || numTags == 2) {
return valid;
}
// At this point, valid == true && numTags > 1.
const std::string& part3 = parts[2];
if (((part3.length() == 2 && isAlpha(part3)) ||
(part3.length() == 3 && isNumber(part3))) && script[0]) {
setRegion(part3.c_str());
} else if (part3.length() >= 4 && part3.length() <= 8) {
setVariant(part3.c_str());
} else {
valid = false;
}
if (!valid || numTags == 3) {
return valid;
}
const std::string& part4 = parts[3];
if (part4.length() >= 4 && part4.length() <= 8) {
setVariant(part4.c_str());
} else {
valid = false;
}
if (!valid || numTags > 4) {
return false;
}
return true;
}
ssize_t LocaleValue::initFromParts(std::vector<std::string>::iterator iter,
std::vector<std::string>::iterator end) {
const std::vector<std::string>::iterator startIter = iter;
std::string& part = *iter;
if (part[0] == 'b' && part[1] == '+') {
// This is a "modified" BCP 47 language tag. Same semantics as BCP 47 tags,
// except that the separator is "+" and not "-".
std::vector<std::string> subtags = util::splitAndLowercase(part, '+');
subtags.erase(subtags.begin());
if (subtags.size() == 1) {
setLanguage(subtags[0].c_str());
} else if (subtags.size() == 2) {
setLanguage(subtags[0].c_str());
// The second tag can either be a region, a variant or a script.
switch (subtags[1].size()) {
case 2:
case 3:
setRegion(subtags[1].c_str());
break;
case 4:
if ('0' <= subtags[1][0] && subtags[1][0] <= '9') {
// This is a variant: fall through
} else {
setScript(subtags[1].c_str());
break;
}
case 5:
case 6:
case 7:
case 8:
setVariant(subtags[1].c_str());
break;
default:
return -1;
}
} else if (subtags.size() == 3) {
// The language is always the first subtag.
setLanguage(subtags[0].c_str());
// The second subtag can either be a script or a region code.
// If its size is 4, it's a script code, else it's a region code.
if (subtags[1].size() == 4) {
setScript(subtags[1].c_str());
} else if (subtags[1].size() == 2 || subtags[1].size() == 3) {
setRegion(subtags[1].c_str());
} else {
return -1;
}
// The third tag can either be a region code (if the second tag was
// a script), else a variant code.
if (subtags[2].size() >= 4) {
setVariant(subtags[2].c_str());
} else {
setRegion(subtags[2].c_str());
}
} else if (subtags.size() == 4) {
setLanguage(subtags[0].c_str());
setScript(subtags[1].c_str());
setRegion(subtags[2].c_str());
setVariant(subtags[3].c_str());
} else {
return -1;
}
++iter;
} else {
if ((part.length() == 2 || part.length() == 3)
&& isAlpha(part) && part != "car") {
setLanguage(part.c_str());
++iter;
if (iter != end) {
const std::string& regionPart = *iter;
if (regionPart.c_str()[0] == 'r' && regionPart.length() == 3) {
setRegion(regionPart.c_str() + 1);
++iter;
}
}
}
}
return static_cast<ssize_t>(iter - startIter);
}
std::string LocaleValue::toDirName() const {
std::string dirName;
if (language[0]) {
dirName += language;
} else {
return dirName;
}
if (script[0]) {
dirName += "-s";
dirName += script;
}
if (region[0]) {
dirName += "-r";
dirName += region;
}
if (variant[0]) {
dirName += "-v";
dirName += variant;
}
return dirName;
}
void LocaleValue::initFromResTable(const ResTable_config& config) {
config.unpackLanguage(language);
config.unpackRegion(region);
if (config.localeScriptWasProvided) {
memcpy(script, config.localeScript, sizeof(config.localeScript));
}
if (config.localeVariant[0]) {
memcpy(variant, config.localeVariant, sizeof(config.localeVariant));
}
}
void LocaleValue::writeTo(ResTable_config* out) const {
out->packLanguage(language);
out->packRegion(region);
if (script[0]) {
memcpy(out->localeScript, script, sizeof(out->localeScript));
out->localeScriptWasProvided = true;
} else {
out->computeScript();
out->localeScriptWasProvided = false;
}
if (variant[0]) {
memcpy(out->localeVariant, variant, sizeof(out->localeVariant));
}
}
} // namespace aapt