initial commit for 0.4.18 version of Telegram Desktop

Telegram/SourceFiles/langloaderplain.cpp

@@ -0,0 +1,135 @@
+/*
+This file is part of Telegram Desktop,
+an unofficial desktop messaging app, see https://telegram.org
+
+Telegram Desktop is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+It is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
+Copyright (c) 2014 John Preston, https://tdesktop.com
+*/
+#include "stdafx.h"
+#include "langloaderplain.h"
+
+namespace {
+
+	bool skipWhitespaces(const char *&from, const char *end) {
+		while (from < end && (*from == ' ' || *from == '\n' || *from == '\t' || *from == '\r')) {
+			++from;
+		}
+		return (from < end);
+	}
+
+	bool skipComment(const char *&from, const char *end) {
+		if (from >= end) return false;
+		if (*from == '/') {
+			if (from + 1 >= end) return true;
+			if (*(from + 1) == '*') {
+				from += 2;
+				while (from + 1 < end && (*from != '*' || *(from + 1) != '/')) {
+					++from;
+				}
+				from += 2;
+				return (from < end);
+			} else if (*(from + 1) == '/') {
+				from += 2;
+				while (from < end && *from != '\n' && *from != '\r') {
+					++from;
+				}
+				++from;
+				return (from < end);
+			} else {
+				return true;
+			}
+		}
+		return true;
+	}
+
+	bool skipJunk(const char *&from, const char *end) {
+		const char *start;
+		do {
+			start = from;
+			if (!skipWhitespaces(from, end)) return false;
+            if (!skipComment(from, end)) throw Exception("Unexpected end of comment!");
+		} while (start != from);
+		return true;
+	}
+
+	bool readKeyValue(const char *&from, const char *end, QString &name, QString &value) {
+		if (!skipJunk(from, end)) return false;
+
+		const char *nameStart = from;
+		while (from < end && (*from >= 'a' && *from <= 'z' || *from >= 'A' && *from <= 'Z' || *from == '_' || *from >= '0' && *from <= '9')) {
+			++from;
+		}
+
+		QString varName = QString::fromUtf8(nameStart, from - nameStart);
+
+        if (!skipJunk(from, end)) throw Exception("Unexpected end of file!");
+        if (*from != ':') throw Exception(QString("':' expected after '%1'").arg(varName));
+
+        if (!skipJunk(++from, end)) throw Exception("Unexpected end of file!");
+        if (*from != '"') throw Exception(QString("Expected string after '%1:'").arg(varName));
+
+		QByteArray varValue;
+		const char *start = ++from;
+		while (from < end && *from != '"') {
+			if (*from == '\\') {
+                if (from + 1 >= end) throw Exception("Unexpected end of file!");
+				if (*(from + 1) == '"' || *(from + 1) == '\\') {
+					if (from > start) varValue.append(start, from - start);
+					start = ++from;
+				}
+			}
+			++from;
+		}
+        if (from >= end) throw Exception("Unexpected end of file!");
+		if (from > start) varValue.append(start, from - start);
+
+        if (!skipJunk(++from, end)) throw Exception("Unexpected end of file!");
+        if (*from != ';') throw Exception(QString("';' expected after '%1: \"value\"'").arg(varName));
+
+		skipJunk(++from, end);
+
+		name = varName;
+		value = QString::fromUtf8(varValue);
+		return true;
+	}
+}
+
+LangLoaderPlain::LangLoaderPlain(const QString &file) {
+	QFile f(file);
+	if (!f.open(QIODevice::ReadOnly)) {
+		error(qsl("Could not open input file!"));
+		return;
+	}
+	if (f.size() > 1024 * 1024) {
+		error(qsl("Too big file: %1").arg(f.size()));
+		return;
+	}
+	QByteArray data = f.readAll();
+	f.close();
+
+	try {
+		const char *from = data.constData(), *end = data.constData() + data.size();
+		while (true) {
+			QString name, value;
+			if (!readKeyValue(from, end, name, value)) {
+				break;
+			}
+			if (!feedKeyValue(name, value)) {
+				break;
+			}
+		}
+	} catch (exception &e) {
+		error(QString::fromUtf8(e.what()));
+		return;
+	}
+}