115 lines
3.5 KiB
C++
115 lines
3.5 KiB
C++
/*
|
|
This file is part of Telegram Desktop,
|
|
the official desktop version of Telegram 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.
|
|
|
|
In addition, as a special exception, the copyright holders give permission
|
|
to link the code of portions of this program with the OpenSSL library.
|
|
|
|
Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
|
|
Copyright (c) 2014-2016 John Preston, https://desktop.telegram.org
|
|
*/
|
|
#include "stdafx.h"
|
|
#include "core/parse_helper.h"
|
|
|
|
namespace base {
|
|
namespace parse {
|
|
|
|
// inspired by https://github.com/sindresorhus/strip-json-comments
|
|
QByteArray stripComments(const QByteArray &content) {
|
|
enum class InsideComment {
|
|
None,
|
|
SingleLine,
|
|
MultiLine,
|
|
};
|
|
auto insideComment = InsideComment::None;
|
|
auto insideString = false;
|
|
|
|
QByteArray result;
|
|
auto begin = content.cbegin(), end = content.cend(), offset = begin;
|
|
auto feedContent = [&result, &offset, end](const char *ch) {
|
|
if (ch > offset) {
|
|
if (result.isEmpty()) result.reserve(end - offset - 2);
|
|
result.append(offset, ch - offset);
|
|
offset = ch;
|
|
}
|
|
};
|
|
auto feedComment = [&result, &offset, end](const char *ch) {
|
|
if (ch > offset) {
|
|
if (result.isEmpty()) result.reserve(end - offset - 2);
|
|
result.append(' ');
|
|
offset = ch;
|
|
}
|
|
};
|
|
for (auto ch = offset; ch != end;) {
|
|
auto currentChar = *ch;
|
|
auto nextChar = (ch + 1 == end) ? 0 : *(ch + 1);
|
|
|
|
if (insideComment == InsideComment::None && currentChar == '"') {
|
|
auto escaped = ((ch > begin) && *(ch - 1) == '\\') && ((ch - 1 < begin) || *(ch - 2) != '\\');
|
|
if (!escaped) {
|
|
insideString = !insideString;
|
|
}
|
|
}
|
|
if (insideString) {
|
|
++ch;
|
|
continue;
|
|
}
|
|
|
|
if (insideComment == InsideComment::None && currentChar == '/' && nextChar == '/') {
|
|
feedContent(ch);
|
|
insideComment = InsideComment::SingleLine;
|
|
ch += 2;
|
|
} else if (insideComment == InsideComment::SingleLine && currentChar == '\r' && nextChar == '\n') {
|
|
feedComment(ch);
|
|
ch += 2;
|
|
insideComment = InsideComment::None;
|
|
} else if (insideComment == InsideComment::SingleLine && currentChar == '\n') {
|
|
feedComment(ch);
|
|
++ch;
|
|
insideComment = InsideComment::None;
|
|
} else if (insideComment == InsideComment::None && currentChar == '/' && nextChar == '*') {
|
|
feedContent(ch);
|
|
ch += 2;
|
|
insideComment = InsideComment::MultiLine;
|
|
} else if (insideComment == InsideComment::MultiLine && currentChar == '*' && nextChar == '/') {
|
|
ch += 2;
|
|
feedComment(ch);
|
|
insideComment = InsideComment::None;
|
|
} else if (insideComment == InsideComment::MultiLine && currentChar == '\r' && nextChar == '\n') {
|
|
feedComment(ch);
|
|
ch += 2;
|
|
feedContent(ch);
|
|
} else if (insideComment == InsideComment::MultiLine && currentChar == '\n') {
|
|
feedComment(ch);
|
|
++ch;
|
|
feedContent(ch);
|
|
} else {
|
|
++ch;
|
|
}
|
|
}
|
|
|
|
if (insideComment == InsideComment::MultiLine) {
|
|
// unexpected end of content
|
|
}
|
|
if (insideComment == InsideComment::None && end > offset) {
|
|
if (result.isEmpty()) {
|
|
return content;
|
|
} else {
|
|
result.append(offset, end - offset);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
} // namespace parse
|
|
} // namespace base
|