mirror of
https://github.com/telegramdesktop/tdesktop
synced 2025-02-10 00:57:57 +00:00
08167a6a91
Currently the build without implicitly included precompiled header is not supported anyway (because Qt MOC source files do not include stdafx.h, they include plain headers). So when we decide to support building without implicitly included precompiled headers we'll have to fix all the headers anyway.
115 lines
3.5 KiB
C++
115 lines
3.5 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 "core/parse_helper.h"
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namespace base {
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namespace parse {
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// inspired by https://github.com/sindresorhus/strip-json-comments
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QByteArray stripComments(const QByteArray &content) {
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enum class InsideComment {
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None,
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SingleLine,
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MultiLine,
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};
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auto insideComment = InsideComment::None;
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auto insideString = false;
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QByteArray result;
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auto begin = content.cbegin(), end = content.cend(), offset = begin;
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auto feedContent = [&result, &offset, end](const char *ch) {
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if (ch > offset) {
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if (result.isEmpty()) result.reserve(end - offset - 2);
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result.append(offset, ch - offset);
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offset = ch;
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}
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};
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auto feedComment = [&result, &offset, end](const char *ch) {
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if (ch > offset) {
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if (result.isEmpty()) result.reserve(end - offset - 2);
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result.append(' ');
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offset = ch;
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}
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};
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for (auto ch = offset; ch != end;) {
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auto currentChar = *ch;
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auto nextChar = (ch + 1 == end) ? 0 : *(ch + 1);
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if (insideComment == InsideComment::None && currentChar == '"') {
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auto escaped = ((ch > begin) && *(ch - 1) == '\\') && ((ch - 1 < begin) || *(ch - 2) != '\\');
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if (!escaped) {
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insideString = !insideString;
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}
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}
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if (insideString) {
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++ch;
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continue;
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}
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if (insideComment == InsideComment::None && currentChar == '/' && nextChar == '/') {
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feedContent(ch);
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insideComment = InsideComment::SingleLine;
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ch += 2;
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} else if (insideComment == InsideComment::SingleLine && currentChar == '\r' && nextChar == '\n') {
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feedComment(ch);
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ch += 2;
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insideComment = InsideComment::None;
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} else if (insideComment == InsideComment::SingleLine && currentChar == '\n') {
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feedComment(ch);
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++ch;
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insideComment = InsideComment::None;
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} else if (insideComment == InsideComment::None && currentChar == '/' && nextChar == '*') {
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feedContent(ch);
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ch += 2;
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insideComment = InsideComment::MultiLine;
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} else if (insideComment == InsideComment::MultiLine && currentChar == '*' && nextChar == '/') {
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ch += 2;
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feedComment(ch);
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insideComment = InsideComment::None;
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} else if (insideComment == InsideComment::MultiLine && currentChar == '\r' && nextChar == '\n') {
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feedComment(ch);
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ch += 2;
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feedContent(ch);
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} else if (insideComment == InsideComment::MultiLine && currentChar == '\n') {
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feedComment(ch);
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++ch;
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feedContent(ch);
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} else {
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++ch;
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}
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}
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if (insideComment == InsideComment::MultiLine) {
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// unexpected end of content
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}
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if (insideComment == InsideComment::None && end > offset) {
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if (result.isEmpty()) {
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return content;
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} else {
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result.append(offset, end - offset);
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}
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}
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return result;
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}
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} // namespace parse
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} // namespace base
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