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Telegram/SourceFiles/mtproto/details/mtproto_dump_to_text.h

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+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+#include "mtproto/core_types.h"
+#include "mtproto/details/mtproto_serialized_request.h"
+
+namespace MTP::details {
+
+// Human-readable text serialization
+QString DumpToText(const mtpPrime *&from, const mtpPrime *end);
+
+struct DumpToTextBuffer {
+	static constexpr auto kBufferSize = 1024 * 1024; // 1 mb start size
+
+	DumpToTextBuffer()
+		: p(new char[kBufferSize])
+		, alloced(kBufferSize) {
+	}
+	~DumpToTextBuffer() {
+		delete[] p;
+	}
+
+	DumpToTextBuffer &add(const QString &data) {
+		auto d = data.toUtf8();
+		return add(d.constData(), d.size());
+	}
+
+	DumpToTextBuffer &add(const char *data, int32 len = -1) {
+		if (len < 0) len = strlen(data);
+		if (!len) return (*this);
+
+		ensureLength(len);
+		memcpy(p + size, data, len);
+		size += len;
+		return (*this);
+	}
+
+	DumpToTextBuffer &addSpaces(int32 level) {
+		int32 len = level * 2;
+		if (!len) return (*this);
+
+		ensureLength(len);
+		for (char *ptr = p + size, *end = ptr + len; ptr != end; ++ptr) {
+			*ptr = ' ';
+		}
+		size += len;
+		return (*this);
+	}
+
+	DumpToTextBuffer &error(const char *problem = "could not decode type") {
+		return add("[ERROR] (").add(problem).add(")");
+	}
+
+	void ensureLength(int32 add) {
+		if (size + add <= alloced) return;
+
+		int32 newsize = size + add;
+		if (newsize % kBufferSize) {
+			newsize += kBufferSize - (newsize % kBufferSize);
+		}
+		char *b = new char[newsize];
+		memcpy(b, p, size);
+		alloced = newsize;
+		delete[] p;
+		p = b;
+	}
+
+	char *p = nullptr;
+	int size = 0;
+	int alloced = 0;
+
+};
+
+[[nodiscard]] bool DumpToTextCore(DumpToTextBuffer &to, const mtpPrime *&from, const mtpPrime *end, mtpTypeId cons, uint32 level, mtpPrime vcons = 0);
+
+} // namespace MTP::details