codegen/codegen/lang/subsets.cpp at master-codegen · AyuGram/codegen · GitHub

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// This file is part of Desktop App Toolkit,

// a set of libraries for developing nice desktop applications.

// For license and copyright information please follow this link:

// https://github.com/desktop-app/legal/blob/master/LEGAL

#include "codegen/lang/subsets.h"

#include "codegen/common/logging.h"

#include <algorithm>

#include <map>

#include <set>

#include <vector>

#include <QtCore/QByteArrayList>

#include <QtCore/QDataStream>

#include <QtCore/QDateTime>

#include <QtCore/QDir>

#include <QtCore/QDirIterator>

#include <QtCore/QFile>

#include <QtCore/QFileInfo>

#include <QtCore/QHash>

namespace codegen {

namespace lang {

namespace {

constexpr int kErrorCantReadKeys = 831;

constexpr int kErrorCantReadSource = 832;

constexpr int kErrorCantWriteSubset = 833;

constexpr auto kCacheVersion = quint32(1);

const auto kKeysFile = QString("lang_auto_keys.h");

const auto kSubsetsFolder = QString("lang_subsets");

const auto kCacheFile = QString("lang_subsets/.cache");

const auto kDeclarationStart = QByteArray("inline constexpr phrase<");

const auto kSpecializationStart = QByteArray("struct phrase<");

const auto kPhraseUsage = QByteArray("phrase<");

[[nodiscard]] bool IsIdentifierChar(char ch) {

return (ch >= 'a' && ch <= 'z')

|| (ch >= 'A' && ch <= 'Z')

|| (ch >= '0' && ch <= '9')

|| (ch == '_');

}

struct Declarations {

std::vector<QByteArray> code;

QHash<QByteArray, int> byName;

std::map<QByteArray, QByteArray> specializations;

std::vector<QByteArray> combinations;

};

struct Scanned {

qint64 modified = 0;

qint64 size = 0;

std::vector<QByteArray> tokens;

std::vector<QByteArray> combinations;

std::vector<QByteArray> includes;

};

struct SourceFile {

QString absolute;

QString relative;

Scanned scanned;

std::vector<int> keys;

std::vector<int> included;

bool unit = false;

bool fresh = false;

};

struct Cache {

QHash<QString, Scanned> scanned;

QHash<QString, QByteArray> subsets;

qint64 keysModified = 0;

qint64 keysSize = 0;

};

constexpr auto kSaneCount = qint32(1024 * 1024);

QDataStream &operator<<(QDataStream &stream, const Scanned &value) {

const auto list = [&](const std::vector<QByteArray> &values) {

stream << qint32(values.size());

for (const auto &entry : values) {

stream << entry;

}

};

stream << value.modified << value.size;

list(value.tokens);

list(value.combinations);

list(value.includes);

return stream;

}

QDataStream &operator>>(QDataStream &stream, Scanned &value) {

const auto list = [&](std::vector<QByteArray> &values) {

auto count = qint32(0);

stream >> count;

if (count < 0 || count > kSaneCount) {

stream.setStatus(QDataStream::ReadCorruptData);

return;

}

values.resize(count);

for (auto &entry : values) {

stream >> entry;

}

};

stream >> value.modified >> value.size;

list(value.tokens);

list(value.combinations);

list(value.includes);

return stream;

}

[[nodiscard]] QByteArray NormalizeCombination(const QByteArray &tags) {

auto result = QByteArrayList();

for (const auto &tag : tags.split(',')) {

const auto trimmed = tag.trimmed();

if (!trimmed.startsWith("lngtag_")) {

return QByteArray();

}

result.push_back(trimmed);

}

return result.join(',');

}

[[nodiscard]] bool ReadDeclarations(

const QString &path,

Declarations &result) {

auto file = QFile(path);

if (!file.open(QIODevice::ReadOnly)) {

common::logError(kErrorCantReadKeys, path)

<< "can not open the generated keys header for reading";

return false;

}

const auto content = file.readAll();

file.close();

auto block = QByteArray();

auto blockCombination = QByteArray();

auto inside = false;

for (auto from = qsizetype(0); from < content.size();) {

auto till = content.indexOf('\n', from);

if (till < 0) {

till = content.size();

}

const auto line = content.mid(from, till - from);

from = till + 1;

if (inside) {

block += line + '\n';

if (line == "};") {

result.specializations.emplace(blockCombination, block);

inside = false;

}

continue;

} else if (line.startsWith(kSpecializationStart)) {

const auto close = line.lastIndexOf('>');

blockCombination = NormalizeCombination(line.mid(

kSpecializationStart.size(),

close - kSpecializationStart.size()));

block = "template <>\n" + line + '\n';

inside = true;

continue;

} else if (!line.startsWith(kDeclarationStart)) {

continue;

}

const auto after = line.indexOf("> ", kDeclarationStart.size() - 1);

const auto brace = (after < 0) ? -1 : line.indexOf('{', after + 2);

if (after < 0 || brace < 0) {

common::logError(kErrorCantReadKeys, path)

<< "bad key declaration: " << line.constData();

return false;

}

result.byName.insert(

line.mid(after + 2, brace - after - 2).trimmed(),

int(result.code.size()));

result.combinations.push_back(NormalizeCombination(line.mid(

kDeclarationStart.size(),

after - kDeclarationStart.size())));

result.code.push_back(line);

}

if (result.code.empty()) {

common::logError(kErrorCantReadKeys, path)

<< "no key declarations found";

return false;

}

return true;

}

void Scan(const QByteArray &content, Scanned &result) {

const auto data = content.constData();

const auto size = content.size();

for (auto i = qsizetype(0); i + 4 < size; ++i) {

const auto isKeyPrefix = (data[i] == 'l' && data[i + 1] == 'n'

&& data[i + 2] == 'g' && data[i + 3] == '_')

|| (data[i] == 'a' && data[i + 1] == 'y'

&& data[i + 2] == 'u' && data[i + 3] == '_');

if (!isKeyPrefix

|| (i > 0 && IsIdentifierChar(data[i - 1]))) {

continue;

}

auto till = i + 4;

while (till != size && IsIdentifierChar(data[till])) {

++till;

}

result.tokens.push_back(content.mid(i, till - i));

i = till - 1;

}

for (auto from = qsizetype(0); from != size;) {

const auto found = content.indexOf(kPhraseUsage, from);

if (found < 0) {

break;

}

from = found + kPhraseUsage.size();

const auto close = content.indexOf('>', from);

if (close < 0) {

break;

}

const auto combination = NormalizeCombination(

content.mid(from, close - from));

if (!combination.isEmpty()) {

result.combinations.push_back(combination);

}

from = close + 1;

}

const auto directive = QByteArray("#include");

for (auto from = qsizetype(0); from != size;) {

const auto found = content.indexOf(directive, from);

if (found < 0) {

break;

}

from = found + directive.size();

auto lineStart = found;

while (lineStart > 0 && data[lineStart - 1] != '\n') {

--lineStart;

}

auto clean = true;

for (auto i = lineStart; i != found; ++i) {

if (data[i] != ' ' && data[i] != '\t') {

clean = false;

break;

}

if (!clean) {

continue;

}

auto quote = from;

while (quote != size && (data[quote] == ' ' || data[quote] == '\t')) {

++quote;

}

if (quote == size || data[quote] != '"') {

continue;

}

const auto till = content.indexOf('"', quote + 1);

if (till < 0) {

break;

}

result.includes.push_back(content.mid(quote + 1, till - quote - 1));

from = till + 1;

}

[[nodiscard]] Cache ReadCache(const QString &path) {

auto result = Cache();

auto file = QFile(path);

if (!file.open(QIODevice::ReadOnly)) {

return result;

}

auto stream = QDataStream(&file);

auto version = quint32(0);

stream >> version;

if (version != kCacheVersion) {

return Cache();

}

stream >> result.keysModified >> result.keysSize;

stream >> result.scanned >> result.subsets;

return (stream.status() == QDataStream::Ok) ? result : Cache();

}

void WriteCache(const QString &path, const Cache &cache) {

auto file = QFile(path);

if (!file.open(QIODevice::WriteOnly)) {

return;

}

auto stream = QDataStream(&file);

stream << kCacheVersion << cache.keysModified << cache.keysSize;

stream << cache.scanned << cache.subsets;

}

[[nodiscard]] QByteArray Signature(

const std::vector<int> &keys,

const std::set<QByteArray> &combinations) {

auto result = QByteArray();

for (const auto key : keys) {

result += QByteArray::number(key) + ' ';

}

result += '|';

for (const auto &combination : combinations) {

result += combination + ' ';

}

return result;

}

[[nodiscard]] bool WriteSubset(

const QString &path,

const Declarations &declarations,

const std::vector<int> &keys,

const std::set<QByteArray> &combinations,

const common::ProjectInfo &project) {

auto file = common::CppFile(path, project);

file.include("lang_auto.h").newline();

file.pushNamespace("tr").newline();

for (const auto &combination : combinations) {

const auto i = declarations.specializations.find(combination);

if (i != declarations.specializations.end()) {

file.stream() << i->second;

}

for (const auto index : keys) {

file.stream() << declarations.code[index] << "\n";

}

file.newline().popNamespace();

if (!file.finalize()) {

common::logError(kErrorCantWriteSubset, path)

<< "can not write the lang keys subset";

return false;

}

return true;

}

} // namespace

bool WriteSubsets(

const QString &genPath,

const QString &sourcesPath,

const common::ProjectInfo &project) {

const auto keysPath = genPath + '/' + kKeysFile;

const auto keysInfo = QFileInfo(keysPath);

auto cache = ReadCache(genPath + '/' + kCacheFile);

const auto keysSame = (cache.keysModified

== keysInfo.lastModified().toMSecsSinceEpoch())

&& (cache.keysSize == keysInfo.size());

const auto root = QDir(sourcesPath).absolutePath();

auto files = std::vector<SourceFile>();

auto indices = QHash<QString, int>();

auto iterator = QDirIterator(

root,

QDir::Files,

QDirIterator::Subdirectories);

while (iterator.hasNext()) {

const auto absolute = iterator.next();

if (!absolute.endsWith(".cpp")

&& !absolute.endsWith(".h")

&& !absolute.endsWith(".mm")) {

continue;

}

const auto info = iterator.fileInfo();

auto file = SourceFile();

file.absolute = absolute;

file.relative = absolute.mid(root.size() + 1);

file.unit = absolute.endsWith(".cpp") || absolute.endsWith(".mm");

file.scanned.modified = info.lastModified().toMSecsSinceEpoch();

file.scanned.size = info.size();

files.push_back(std::move(file));

}

std::sort(files.begin(), files.end(), [](const auto &a, const auto &b) {

return a.relative < b.relative;

});

for (auto i = 0, count = int(files.size()); i != count; ++i) {

indices.insert(files[i].absolute, i);

}

auto dirty = !keysSame || (int(cache.scanned.size()) != int(files.size()));

for (auto &file : files) {

const auto i = cache.scanned.constFind(file.relative);

if (i != cache.scanned.cend()

&& i->modified == file.scanned.modified

&& i->size == file.scanned.size) {

file.scanned = *i;

continue;

}

auto device = QFile(file.absolute);

if (!device.open(QIODevice::ReadOnly)) {

common::logError(kErrorCantReadSource, file.absolute)

<< "can not open the source file for reading";

return false;

}

auto scanned = Scanned();

scanned.modified = file.scanned.modified;

scanned.size = file.scanned.size;

Scan(device.readAll(), scanned);

if (i == cache.scanned.cend()

|| i->tokens != scanned.tokens

|| i->combinations != scanned.combinations

|| i->includes != scanned.includes) {

dirty = true;

}

file.scanned = std::move(scanned);

}

const auto subsets = genPath + '/' + kSubsetsFolder;

if (!dirty) {

auto complete = true;

for (const auto &file : files) {

if (file.unit

&& !QFileInfo::exists(subsets + '/' + file.relative + ".h")) {

complete = false;

break;

}

if (complete) {

auto next = Cache();

next.keysModified = keysInfo.lastModified().toMSecsSinceEpoch();

next.keysSize = keysInfo.size();

next.subsets = cache.subsets;

for (const auto &file : files) {

next.scanned.insert(file.relative, file.scanned);

}

WriteCache(genPath + '/' + kCacheFile, next);

return true;

}

auto declarations = Declarations();

if (!ReadDeclarations(keysPath, declarations)) {

return false;

}

for (auto &file : files) {

for (const auto &token : file.scanned.tokens) {

const auto i = declarations.byName.constFind(token);

if (i != declarations.byName.cend()) {

file.keys.push_back(*i);

}

const auto dir = file.absolute.left(file.absolute.lastIndexOf('/'));

for (const auto &include : file.scanned.includes) {

const auto relative = QString::fromUtf8(include);

const auto exact = !relative.contains("..")

&& !relative.contains("./");

for (const auto &base : { dir, root }) {

const auto joined = base + '/' + relative;

const auto i = indices.constFind(

exact ? joined : QDir::cleanPath(joined));

if (i != indices.cend()) {

file.included.push_back(*i);

break;

}

auto next = Cache();

next.keysModified = keysInfo.lastModified().toMSecsSinceEpoch();

next.keysSize = keysInfo.size();

auto visited = std::vector<int>(files.size(), -1);

auto taken = std::vector<int>(declarations.code.size(), -1);

auto queue = std::vector<int>();

auto keys = std::vector<int>();

auto combinations = std::set<QByteArray>();

for (auto i = 0, count = int(files.size()); i != count; ++i) {

next.scanned.insert(files[i].relative, files[i].scanned);

if (!files[i].unit) {

continue;

}

keys.clear();

combinations.clear();

queue.clear();

queue.push_back(i);

visited[i] = i;

for (auto j = 0; j != int(queue.size()); ++j) {

const auto &file = files[queue[j]];

for (const auto key : file.keys) {

if (taken[key] != i) {

taken[key] = i;

keys.push_back(key);

const auto &combination = declarations.combinations[key];

if (!combination.isEmpty()) {

combinations.emplace(combination);

}

for (const auto &combination : file.scanned.combinations) {

combinations.emplace(combination);

}

for (const auto included : file.included) {

if (visited[included] != i) {

visited[included] = i;

queue.push_back(included);

}

std::sort(keys.begin(), keys.end());

const auto signature = Signature(keys, combinations);

next.subsets.insert(files[i].relative, signature);

const auto path = subsets + '/' + files[i].relative + ".h";

const auto known = cache.subsets.constFind(files[i].relative);

if (keysSame

&& known != cache.subsets.cend()

&& *known == signature

&& QFileInfo::exists(path)) {

continue;

} else if (!WriteSubset(

path,

declarations,

keys,

combinations,

project)) {

return false;

}

WriteCache(genPath + '/' + kCacheFile, next);

return true;

}

} // namespace lang

} // namespace codegen

codegen/codegen/lang/subsets.cpp at master-codegen · AyuGram/codegen · GitHub

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