135 lines
3.9 KiB
C++
135 lines
3.9 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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Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
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Copyright (c) 2014 John Preston, https://desktop.telegram.org
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*/
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#include "stdafx.h"
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#include "langloaderplain.h"
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namespace {
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bool skipWhitespaces(const char *&from, const char *end) {
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while (from < end && (*from == ' ' || *from == '\n' || *from == '\t' || *from == '\r')) {
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++from;
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}
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return (from < end);
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}
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bool skipComment(const char *&from, const char *end) {
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if (from >= end) return false;
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if (*from == '/') {
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if (from + 1 >= end) return true;
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if (*(from + 1) == '*') {
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from += 2;
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while (from + 1 < end && (*from != '*' || *(from + 1) != '/')) {
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++from;
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}
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from += 2;
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return (from < end);
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} else if (*(from + 1) == '/') {
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from += 2;
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while (from < end && *from != '\n' && *from != '\r') {
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++from;
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}
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++from;
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return (from < end);
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} else {
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return true;
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}
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}
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return true;
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}
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bool skipJunk(const char *&from, const char *end) {
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const char *start;
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do {
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start = from;
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if (!skipWhitespaces(from, end)) return false;
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if (!skipComment(from, end)) throw Exception("Unexpected end of comment!");
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} while (start != from);
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return true;
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}
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bool readKeyValue(const char *&from, const char *end, QString &name, QString &value) {
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if (!skipJunk(from, end)) return false;
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const char *nameStart = from;
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while (from < end && ((*from >= 'a' && *from <= 'z') || (*from >= 'A' && *from <= 'Z') || *from == '_' || (*from >= '0' && *from <= '9'))) {
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++from;
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}
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QString varName = QString::fromUtf8(nameStart, from - nameStart);
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if (!skipJunk(from, end)) throw Exception("Unexpected end of file!");
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if (*from != ':') throw Exception(QString("':' expected after '%1'").arg(varName));
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if (!skipJunk(++from, end)) throw Exception("Unexpected end of file!");
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if (*from != '"') throw Exception(QString("Expected string after '%1:'").arg(varName));
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QByteArray varValue;
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const char *start = ++from;
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while (from < end && *from != '"') {
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if (*from == '\\') {
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if (from + 1 >= end) throw Exception("Unexpected end of file!");
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if (*(from + 1) == '"' || *(from + 1) == '\\') {
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if (from > start) varValue.append(start, from - start);
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start = ++from;
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}
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}
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++from;
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}
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if (from >= end) throw Exception("Unexpected end of file!");
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if (from > start) varValue.append(start, from - start);
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if (!skipJunk(++from, end)) throw Exception("Unexpected end of file!");
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if (*from != ';') throw Exception(QString("';' expected after '%1: \"value\"'").arg(varName));
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skipJunk(++from, end);
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name = varName;
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value = QString::fromUtf8(varValue);
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return true;
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}
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}
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LangLoaderPlain::LangLoaderPlain(const QString &file) {
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QFile f(file);
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if (!f.open(QIODevice::ReadOnly)) {
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error(qsl("Could not open input file!"));
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return;
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}
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if (f.size() > 1024 * 1024) {
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error(qsl("Too big file: %1").arg(f.size()));
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return;
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}
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QByteArray data = f.readAll();
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f.close();
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try {
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const char *from = data.constData(), *end = data.constData() + data.size();
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while (true) {
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QString name, value;
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if (!readKeyValue(from, end, name, value)) {
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break;
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}
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if (!feedKeyValue(name, value)) {
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break;
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}
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}
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} catch (exception &e) {
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error(QString::fromUtf8(e.what()));
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return;
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}
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}
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