298 lines
11 KiB
C++
298 lines
11 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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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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}
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bool LangLoaderPlain::readKeyValue(const char *&from, const char *end) {
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if (!skipJunk(from, end)) return false;
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if (*from != '"') throw Exception(QString("Expected quote before key name!"));
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++from;
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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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QByteArray varName = QByteArray(nameStart, from - nameStart);
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if (*from != '"') throw Exception(QString("Expected quote after key name '%1'!").arg(QLatin1String(varName)));
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++from;
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if (!skipJunk(from, end)) throw Exception(QString("Unexpected end of file in key '%1'!").arg(QLatin1String(varName)));
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if (*from != '=') throw Exception(QString("'=' expected in key '%1'!").arg(QLatin1String(varName)));
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if (!skipJunk(++from, end)) throw Exception(QString("Unexpected end of file in key '%1'!").arg(QLatin1String(varName)));
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if (*from != '"') throw Exception(QString("Expected string after '=' in key '%1'!").arg(QLatin1String(varName)));
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LangKey varKey = keyIndex(varName);
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bool feedingValue = request.isEmpty();
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if (feedingValue) {
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if (varKey == lngkeys_cnt) {
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warning(QString("Unknown key '%1'!").arg(QLatin1String(varName)));
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}
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} else if (!request.contains(varKey)) {
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varKey = lngkeys_cnt;
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}
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bool readingValue = (varKey != lngkeys_cnt);
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QByteArray varValue;
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QMap<ushort, bool> tagsUsed;
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const char *start = ++from;
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while (from < end && *from != '"') {
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if (*from == '\n') {
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throw Exception(QString("Unexpected end of string in key '%1'!").arg(QLatin1String(varName)));
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}
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if (*from == '\\') {
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if (from + 1 >= end) throw Exception(QString("Unexpected end of file in key '%1'!").arg(QLatin1String(varName)));
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if (*(from + 1) == '"' || *(from + 1) == '\\' || *(from + 1) == '{') {
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if (readingValue && from > start) varValue.append(start, from - start);
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start = ++from;
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} else if (*(from + 1) == 'n') {
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if (readingValue) {
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if (from > start) varValue.append(start, int(from - start));
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varValue.append('\n');
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}
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start = (++from) + 1;
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}
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} else if (readingValue && *from == '{') {
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if (from > start) varValue.append(start, int(from - start));
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const char *tagStart = ++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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if (from == tagStart) throw Exception(QString("Expected tag name in key '%1'!").arg(QLatin1String(varName)));
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QByteArray tagName = QByteArray(tagStart, int(from - tagStart));
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if (from == end || (*from != '}' && *from != ':')) throw Exception(QString("Expected '}' or ':' after tag name in key '%1'!").arg(QLatin1String(varName)));
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ushort index = tagIndex(tagName);
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if (index == lngtags_cnt) {
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readingValue = false;
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warning(QString("Tag '%1' not found in key '%2', not using value.").arg(QLatin1String(tagName)).arg(QLatin1String(varName)));
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continue;
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}
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if (!tagReplaced(varKey, index)) {
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readingValue = false;
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warning(QString("Unexpected tag '%1' in key '%2', not using value.").arg(QLatin1String(tagName)).arg(QLatin1String(varName)));
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continue;
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}
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if (tagsUsed.contains(index)) throw Exception(QString("Tag '%1' double used in key '%2'!").arg(QLatin1String(tagName)).arg(QLatin1String(varName)));
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tagsUsed.insert(index, true);
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QString tagReplacer(4, TextCommand);
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tagReplacer[1] = TextCommandLangTag;
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tagReplacer[2] = QChar(0x0020 + index);
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varValue.append(tagReplacer.toUtf8());
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if (*from == ':') {
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start = ++from;
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QByteArray subvarValue;
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bool foundtag = false;
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int countedIndex = 0;
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while (from < end && *from != '"' && *from != '}') {
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if (*from == '|') {
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if (from > start) subvarValue.append(start, int(from - start));
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if (countedIndex >= lngtags_max_counted_values) throw Exception(QString("Too many values inside counted tag '%1' in '%2' key!").arg(QLatin1String(tagName)).arg(QLatin1String(varName)));
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if (feedingValue) {
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LangKey subkey = subkeyIndex(varKey, index, countedIndex++);
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if (subkey == lngkeys_cnt) {
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readingValue = false;
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warning(QString("Unexpected counted tag '%1' in key '%2', not using value.").arg(QLatin1String(tagName)).arg(QLatin1String(varName)));
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break;
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} else if (!feedKeyValue(subkey, QString::fromUtf8(subvarValue))) throw Exception(QString("Tag '%1' is not counted in key '%2'!").arg(QLatin1String(tagName)).arg(QLatin1String(varName)));
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}
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subvarValue = QByteArray();
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foundtag = false;
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start = from + 1;
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}
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if (*from == '\n') {
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throw Exception(QString("Unexpected end of string inside counted tag '%1' in '%2' key!").arg(QLatin1String(tagName)).arg(QLatin1String(varName)));
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}
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if (*from == '\\') {
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if (from + 1 >= end) throw Exception(QString("Unexpected end of file inside counted tag '%1' in '%2' key!").arg(QLatin1String(tagName)).arg(QLatin1String(varName)));
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if (*(from + 1) == '"' || *(from + 1) == '\\' || *(from + 1) == '{' || *(from + 1) == '#') {
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if (from > start) subvarValue.append(start, int(from - start));
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start = ++from;
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} else if (*(from + 1) == 'n') {
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if (from > start) subvarValue.append(start, int(from - start));
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subvarValue.append('\n');
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start = (++from) + 1;
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}
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} else if (*from == '{') {
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throw Exception(QString("Unexpected tag inside counted tag '%1' in '%2' key!").arg(QLatin1String(tagName)).arg(QLatin1String(varName)));
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} else if (*from == '#') {
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if (foundtag) throw Exception(QString("Replacement '#' double used inside counted tag '%1' in '%2' key!").arg(QLatin1String(tagName)).arg(QLatin1String(varName)));
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foundtag = true;
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if (from > start) subvarValue.append(start, int(from - start));
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subvarValue.append(tagReplacer.toUtf8());
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start = from + 1;
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}
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++from;
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}
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if (!readingValue) continue;
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if (from >= end) throw Exception(QString("Unexpected end of file inside counted tag '%1' in '%2' key!").arg(QString::fromUtf8(tagName)).arg(QString::fromUtf8(varName)));
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if (*from == '"') throw Exception(QString("Unexpected end of string inside counted tag '%1' in '%2' key!").arg(QString::fromUtf8(tagName)).arg(QString::fromUtf8(varName)));
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if (from > start) subvarValue.append(start, int(from - start));
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if (countedIndex >= lngtags_max_counted_values) throw Exception(QString("Too many values inside counted tag '%1' in '%2' key!").arg(QLatin1String(tagName)).arg(QLatin1String(varName)));
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if (feedingValue) {
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LangKey subkey = subkeyIndex(varKey, index, countedIndex++);
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if (subkey == lngkeys_cnt) {
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readingValue = false;
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warning(QString("Unexpected counted tag '%1' in key '%2', not using value.").arg(QLatin1String(tagName)).arg(QLatin1String(varName)));
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break;
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} else if (!feedKeyValue(subkey, QString::fromUtf8(subvarValue))) throw Exception(QString("Tag '%1' is not counted in key '%2'!").arg(QLatin1String(tagName)).arg(QLatin1String(varName)));
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}
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}
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start = from + 1;
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}
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++from;
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}
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if (from >= end) throw Exception(QString("Unexpected end of file in key '%1'!").arg(QLatin1String(varName)));
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if (readingValue && from > start) varValue.append(start, from - start);
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if (!skipJunk(++from, end)) throw Exception(QString("Unexpected end of file in key '%1'!").arg(QLatin1String(varName)));
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if (*from != ';') throw Exception(QString("';' expected after \"value\" in key '%1'!").arg(QLatin1String(varName)));
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skipJunk(++from, end);
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if (readingValue) {
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if (feedingValue) {
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if (!feedKeyValue(varKey, QString::fromUtf8(varValue))) throw Exception(QString("Could not write value in key '%1'!").arg(QLatin1String(varName)));
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} else {
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result.insert(varKey, QString::fromUtf8(varValue));
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}
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}
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return true;
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}
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LangLoaderPlain::LangLoaderPlain(const QString &file, const LangLoaderRequest &request) : file(file), request(request) {
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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 checkCodec = f.read(3);
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if (checkCodec.size() < 3) {
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error(qsl("Bad lang input file: %1").arg(file));
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return;
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}
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f.seek(0);
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QByteArray data;
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int skip = 0;
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if ((checkCodec.at(0) == '\xFF' && checkCodec.at(1) == '\xFE') || (checkCodec.at(0) == '\xFE' && checkCodec.at(1) == '\xFF') || (checkCodec.at(1) == 0)) {
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QTextStream stream(&f);
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stream.setCodec("UTF-16");
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QString string = stream.readAll();
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if (stream.status() != QTextStream::Ok) {
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error(qsl("Could not read valid UTF-16 file: % 1").arg(file));
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return;
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}
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f.close();
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data = string.toUtf8();
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} else if (checkCodec.at(0) == 0) {
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QByteArray tmp = "\xFE\xFF" + f.readAll(); // add fake UTF-16 BOM
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f.close();
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QTextStream stream(&tmp);
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stream.setCodec("UTF-16");
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QString string = stream.readAll();
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if (stream.status() != QTextStream::Ok) {
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error(qsl("Could not read valid UTF-16 file: % 1").arg(file));
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return;
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}
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data = string.toUtf8();
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} else {
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data = f.readAll();
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if (checkCodec.at(0) == '\xEF' && checkCodec.at(1) == '\xBB' && checkCodec.at(2) == '\xBF') {
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skip = 3; // skip UTF-8 BOM
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}
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}
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const char *text = data.constData() + skip, *end = text + data.size() - skip;
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try {
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while (true) {
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if (!readKeyValue(text, end)) {
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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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