491 lines
15 KiB
C++
491 lines
15 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop version of Telegram messaging app, see https://telegram.org
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Telegram Desktop is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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It is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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In addition, as a special exception, the copyright holders give permission
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to link the code of portions of this program with the OpenSSL library.
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Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
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Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
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*/
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#include "codegen/lang/generator.h"
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#include <memory>
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#include <functional>
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#include <QtCore/QDir>
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#include <QtCore/QSet>
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#include <QtGui/QImage>
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#include <QtGui/QPainter>
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namespace codegen {
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namespace lang {
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namespace {
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char hexChar(uchar ch) {
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if (ch < 10) {
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return '0' + ch;
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} else if (ch < 16) {
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return 'a' + (ch - 10);
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}
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return '0';
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}
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char hexSecondChar(char ch) {
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return hexChar((*reinterpret_cast<uchar*>(&ch)) & 0x0F);
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}
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char hexFirstChar(char ch) {
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return hexChar((*reinterpret_cast<uchar*>(&ch)) >> 4);
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}
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QString stringToEncodedString(const QString &str) {
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QString result, lineBreak = "\\\n";
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result.reserve(str.size() * 8);
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bool writingHexEscapedCharacters = false, startOnNewLine = false;
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int lastCutSize = 0;
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auto utf = str.toUtf8();
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for (auto ch : utf) {
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if (result.size() - lastCutSize > 80) {
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startOnNewLine = true;
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result.append(lineBreak);
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lastCutSize = result.size();
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}
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if (ch == '\n') {
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writingHexEscapedCharacters = false;
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result.append("\\n");
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} else if (ch == '\t') {
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writingHexEscapedCharacters = false;
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result.append("\\t");
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} else if (ch == '"' || ch == '\\') {
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writingHexEscapedCharacters = false;
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result.append('\\').append(ch);
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} else if (ch < 32 || static_cast<uchar>(ch) > 127) {
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writingHexEscapedCharacters = true;
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result.append("\\x").append(hexFirstChar(ch)).append(hexSecondChar(ch));
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} else {
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if (writingHexEscapedCharacters) {
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writingHexEscapedCharacters = false;
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result.append("\"\"");
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}
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result.append(ch);
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}
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}
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return '"' + (startOnNewLine ? lineBreak : QString()) + result + '"';
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}
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QString stringToEncodedString(const std::string &str) {
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return stringToEncodedString(QString::fromStdString(str));
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}
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QString stringToBinaryArray(const std::string &str) {
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QStringList rows, chars;
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chars.reserve(13);
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rows.reserve(1 + (str.size() / 13));
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for (uchar ch : str) {
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if (chars.size() > 12) {
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rows.push_back(chars.join(", "));
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chars.clear();
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}
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chars.push_back(QString("0x") + hexFirstChar(ch) + hexSecondChar(ch));
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}
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if (!chars.isEmpty()) {
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rows.push_back(chars.join(", "));
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}
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return QString("{") + ((rows.size() > 1) ? '\n' : ' ') + rows.join(",\n") + " }";
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}
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} // namespace
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Generator::Generator(const LangPack &langpack, const QString &destBasePath, const common::ProjectInfo &project)
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: langpack_(langpack)
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, basePath_(destBasePath)
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, baseName_(QFileInfo(basePath_).baseName())
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, project_(project) {
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}
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bool Generator::writeHeader() {
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header_ = std::make_unique<common::CppFile>(basePath_ + ".h", project_);
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header_->include("lang/lang_tag.h").newline().pushNamespace("Lang").stream() << "\
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\n\
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constexpr auto kTagsCount = " << langpack_.tags.size() << ";\n\
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\n";
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header_->popNamespace().newline();
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auto index = 0;
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for (auto &tag : langpack_.tags) {
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header_->stream() << "enum lngtag_" << tag.tag << " { lt_" << tag.tag << " = " << index++ << " };\n";
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}
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header_->stream() << "\
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\n\
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enum LangKey : int {\n";
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for (auto &entry : langpack_.entries) {
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header_->stream() << "\t" << getFullKey(entry) << ",\n";
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}
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header_->stream() << "\
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\n\
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kLangKeysCount,\n\
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};\n\
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\n\
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QString lang(LangKey key);\n\
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\n";
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for (auto &entry : langpack_.entries) {
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auto isPlural = !entry.keyBase.isEmpty();
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auto &key = entry.key;
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auto genericParams = QStringList();
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auto params = QStringList();
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auto applyTags = QStringList();
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auto plural = QString();
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auto nonPluralTagFound = false;
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for (auto &tagData : entry.tags) {
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auto &tag = tagData.tag;
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auto isPluralTag = isPlural && (tag == kPluralTag);
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genericParams.push_back("lngtag_" + tag + ", " + (isPluralTag ? "float64 " : "const ResultString &") + tag + "__val");
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params.push_back("lngtag_" + tag + ", " + (isPluralTag ? "float64 " : "const QString &") + tag + "__val");
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if (isPluralTag) {
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plural = "\tauto plural = Lang::Plural(" + key + ", " + kPluralTag + "__val);\n";
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applyTags.push_back("\tresult = Lang::ReplaceTag<ResultString>::Call(std::move(result), lt_" + tag + ", Lang::StartReplacements<ResultString>::Call(std::move(plural.replacement)));\n");
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} else {
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nonPluralTagFound = true;
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applyTags.push_back("\tresult = Lang::ReplaceTag<ResultString>::Call(std::move(result), lt_" + tag + ", " + tag + "__val);\n");
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}
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}
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if (!entry.tags.empty() && (!isPlural || key == ComputePluralKey(entry.keyBase, 0))) {
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auto initialString = isPlural ? ("std::move(plural.string)") : ("lang(" + getFullKey(entry) + ")");
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header_->stream() << "\
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template <typename ResultString>\n\
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inline ResultString " << (isPlural ? entry.keyBase : key) << "__generic(" << genericParams.join(QString(", ")) << ") {\n\
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" << plural << "\
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auto result = Lang::StartReplacements<ResultString>::Call(" << initialString << ");\n\
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" << applyTags.join(QString()) << "\
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return result;\n\
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}\n\
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constexpr auto " << (isPlural ? entry.keyBase : key) << " = &" << (isPlural ? entry.keyBase : key) << "__generic<QString>;\n\
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\n";
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}
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}
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header_->pushNamespace("Lang").stream() << "\
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\n\
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const char *GetKeyName(LangKey key);\n\
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ushort GetTagIndex(QLatin1String tag);\n\
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LangKey GetKeyIndex(QLatin1String key);\n\
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bool IsTagReplaced(LangKey key, ushort tag);\n\
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QString GetOriginalValue(LangKey key);\n\
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\n";
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return header_->finalize();
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}
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bool Generator::writeSource() {
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source_ = std::make_unique<common::CppFile>(basePath_ + ".cpp", project_);
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source_->include("lang/lang_keys.h").pushNamespace("Lang").pushNamespace().stream() << "\
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const char *KeyNames[kLangKeysCount] = {\n\
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\n";
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for (auto &entry : langpack_.entries) {
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source_->stream() << "\"" << entry.key << "\",\n";
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}
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source_->stream() << "\
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\n\
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};\n\
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\n\
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QChar DefaultData[] = {";
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auto count = 0;
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auto fulllength = 0;
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for (auto &entry : langpack_.entries) {
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for (auto ch : entry.value) {
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if (fulllength > 0) source_->stream() << ",";
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if (!count++) {
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source_->stream() << "\n";
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} else {
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if (count == 12) {
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count = 0;
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}
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source_->stream() << " ";
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}
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source_->stream() << "0x" << QString::number(ch.unicode(), 16);
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++fulllength;
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}
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}
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source_->stream() << " };\n\
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\n\
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int Offsets[] = {";
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count = 0;
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auto offset = 0;
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auto writeOffset = [this, &count, &offset] {
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if (offset > 0) source_->stream() << ",";
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if (!count++) {
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source_->stream() << "\n";
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} else {
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if (count == 12) {
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count = 0;
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}
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source_->stream() << " ";
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}
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source_->stream() << offset;
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};
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for (auto &entry : langpack_.entries) {
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writeOffset();
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offset += entry.value.size();
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}
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writeOffset();
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source_->stream() << " };\n";
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source_->popNamespace().stream() << "\
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\n\
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const char *GetKeyName(LangKey key) {\n\
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return (key < 0 || key >= kLangKeysCount) ? \"\" : KeyNames[key];\n\
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}\n\
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\n\
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ushort GetTagIndex(QLatin1String tag) {\n\
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auto size = tag.size();\n\
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auto data = tag.data();\n";
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auto tagsSet = std::set<QString, std::greater<QString>>();
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for (auto &tag : langpack_.tags) {
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tagsSet.insert(tag.tag);
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}
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writeSetSearch(tagsSet, [](const QString &tag) {
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return "lt_" + tag;
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}, "kTagsCount");
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source_->stream() << "\
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}\n\
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\n\
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LangKey GetKeyIndex(QLatin1String key) {\n\
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auto size = key.size();\n\
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auto data = key.data();\n";
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auto taggedKeys = std::map<QString, QString>();
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auto keysSet = std::set<QString, std::greater<QString>>();
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for (auto &entry : langpack_.entries) {
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if (!entry.keyBase.isEmpty()) {
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for (auto i = 0; i != kPluralPartCount; ++i) {
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auto keyName = entry.keyBase + '#' + kPluralParts[i];
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taggedKeys.emplace(keyName, ComputePluralKey(entry.keyBase, i));
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keysSet.insert(keyName);
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}
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} else {
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auto full = getFullKey(entry);
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if (full != entry.key) {
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taggedKeys.emplace(entry.key, full);
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}
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keysSet.insert(entry.key);
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}
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}
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writeSetSearch(keysSet, [&taggedKeys](const QString &key) {
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auto it = taggedKeys.find(key);
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return (it != taggedKeys.end()) ? it->second : key;
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}, "kLangKeysCount");
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source_->stream() << "\
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}\n\
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\n\
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bool IsTagReplaced(LangKey key, ushort tag) {\n\
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switch (key) {\n";
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auto lastWrittenPluralEntry = QString();
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for (auto &entry : langpack_.entries) {
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if (entry.tags.empty()) {
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continue;
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}
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if (!entry.keyBase.isEmpty()) {
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if (entry.keyBase == lastWrittenPluralEntry) {
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continue;
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}
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lastWrittenPluralEntry = entry.keyBase;
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for (auto i = 0; i != kPluralPartCount; ++i) {
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source_->stream() << "\
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case " << ComputePluralKey(entry.keyBase, i) << ":" << ((i + 1 == kPluralPartCount) ? " {" : "") << "\n";
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}
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} else {
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source_->stream() << "\
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case " << getFullKey(entry) << ": {\n";
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}
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source_->stream() << "\
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switch (tag) {\n";
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for (auto &tag : entry.tags) {
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source_->stream() << "\
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case lt_" << tag.tag << ":\n";
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}
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source_->stream() << "\
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return true;\n\
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}\n\
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} break;\n";
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}
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source_->stream() << "\
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}\
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\n\
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return false;\n\
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}\n\
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\n\
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QString GetOriginalValue(LangKey key) {\n\
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Expects(key >= 0 && key < kLangKeysCount);\n\
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auto offset = Offsets[key];\n\
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return QString::fromRawData(DefaultData + offset, Offsets[key + 1] - offset);\n\
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}\n\
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\n";
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return source_->finalize();
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}
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template <typename ComputeResult>
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void Generator::writeSetSearch(const std::set<QString, std::greater<QString>> &set, ComputeResult computeResult, const QString &invalidResult) {
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auto tabs = [](int size) {
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return QString(size, '\t');
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};
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enum class UsedCheckType {
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Switch,
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If,
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UpcomingIf,
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};
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auto checkTypes = QVector<UsedCheckType>();
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auto checkLengthHistory = QVector<int>(1, 0);
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auto chars = QString();
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auto tabsUsed = 1;
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// Returns true if at least one check was finished.
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auto finishChecksTillKey = [this, &chars, &checkTypes, &checkLengthHistory, &tabsUsed, tabs](const QString &key) {
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auto result = false;
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while (!chars.isEmpty() && key.midRef(0, chars.size()) != chars) {
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result = true;
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auto wasType = checkTypes.back();
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chars.resize(chars.size() - 1);
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checkTypes.pop_back();
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checkLengthHistory.pop_back();
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if (wasType == UsedCheckType::Switch || wasType == UsedCheckType::If) {
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--tabsUsed;
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if (wasType == UsedCheckType::Switch) {
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source_->stream() << tabs(tabsUsed) << "break;\n";
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}
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if ((!chars.isEmpty() && key.midRef(0, chars.size()) != chars) || key == chars) {
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source_->stream() << tabs(tabsUsed) << "}\n";
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}
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}
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}
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return result;
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};
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// Check if we can use "if" for a check on "charIndex" in "it" (otherwise only "switch")
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auto canUseIfForCheck = [](auto it, auto end, int charIndex) {
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auto key = *it;
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auto i = it;
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auto keyStart = key.mid(0, charIndex);
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for (++i; i != end; ++i) {
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auto nextKey = *i;
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if (nextKey.mid(0, charIndex) != keyStart) {
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return true;
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} else if (nextKey.size() > charIndex && nextKey[charIndex] != key[charIndex]) {
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return false;
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}
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}
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return true;
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};
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auto countMinimalLength = [](auto it, auto end, int charIndex) {
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auto key = *it;
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auto i = it;
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auto keyStart = key.mid(0, charIndex);
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auto result = key.size();
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for (++i; i != end; ++i) {
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auto nextKey = *i;
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if (nextKey.mid(0, charIndex) != keyStart) {
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break;
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} else if (nextKey.size() > charIndex && result > nextKey.size()) {
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result = nextKey.size();
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}
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}
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return result;
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};
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for (auto i = set.begin(), e = set.end(); i != e; ++i) {
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// If we use just "auto" here and "name" becomes mutable,
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// the operator[] will return QCharRef instead of QChar,
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// and "auto ch = name[index]" will behave like "auto &ch =",
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// if you assign something to "ch" after that you'll change "name" (!)
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const auto name = *i;
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auto weContinueOldSwitch = finishChecksTillKey(name);
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while (chars.size() != name.size()) {
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auto checking = chars.size();
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auto partialKey = name.mid(0, checking);
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auto keyChar = name[checking];
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auto usedIfForCheckCount = 0;
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auto minimalLengthCheck = countMinimalLength(i, e, checking);
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for (; checking + usedIfForCheckCount != name.size(); ++usedIfForCheckCount) {
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if (!canUseIfForCheck(i, e, checking + usedIfForCheckCount)
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|| countMinimalLength(i, e, checking + usedIfForCheckCount) != minimalLengthCheck) {
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break;
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}
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}
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auto usedIfForCheck = !weContinueOldSwitch && (usedIfForCheckCount > 0);
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auto checkLengthCondition = QString();
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if (weContinueOldSwitch) {
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weContinueOldSwitch = false;
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} else {
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checkLengthCondition = (minimalLengthCheck > checkLengthHistory.back()) ? ("size >= " + QString::number(minimalLengthCheck)) : QString();
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if (!usedIfForCheck) {
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source_->stream() << tabs(tabsUsed) << (checkLengthCondition.isEmpty() ? QString() : ("if (" + checkLengthCondition + ") ")) << "switch (data[" << checking << "]) {\n";
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}
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}
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if (usedIfForCheck) {
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auto conditions = QStringList();
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if (usedIfForCheckCount > 1) {
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conditions.push_back("!memcmp(data + " + QString::number(checking) + ", \"" + name.mid(checking, usedIfForCheckCount) + "\", " + QString::number(usedIfForCheckCount) + ")");
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} else {
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conditions.push_back("data[" + QString::number(checking) + "] == '" + keyChar + "'");
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}
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if (!checkLengthCondition.isEmpty()) {
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conditions.push_front(checkLengthCondition);
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}
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source_->stream() << tabs(tabsUsed) << "if (" << conditions.join(" && ") << ") {\n";
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checkTypes.push_back(UsedCheckType::If);
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for (auto i = 1; i != usedIfForCheckCount; ++i) {
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checkTypes.push_back(UsedCheckType::UpcomingIf);
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chars.push_back(keyChar);
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checkLengthHistory.push_back(qMax(minimalLengthCheck, checkLengthHistory.back()));
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keyChar = name[checking + i];
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}
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} else {
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source_->stream() << tabs(tabsUsed) << "case '" << keyChar << "':\n";
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checkTypes.push_back(UsedCheckType::Switch);
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}
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++tabsUsed;
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chars.push_back(keyChar);
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checkLengthHistory.push_back(qMax(minimalLengthCheck, checkLengthHistory.back()));
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}
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source_->stream() << tabs(tabsUsed) << "return (size == " << chars.size() << ") ? " << computeResult(name) << " : " << invalidResult << ";\n";
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}
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finishChecksTillKey(QString());
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source_->stream() << "\
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\n\
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return " << invalidResult << ";\n";
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}
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QString Generator::getFullKey(const LangPack::Entry &entry) {
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if (!entry.keyBase.isEmpty() || entry.tags.empty()) {
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return entry.key;
|
|
}
|
|
return entry.key + "__tagged";
|
|
}
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|
|
|
} // namespace lang
|
|
} // namespace codegen
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