A tool to read and write the Skype quote clipboard.

SkypeClipboard.cpp

#include <cstring>
#include <iostream>
#include <memory>

#include <Windows.h>

using std::cerr;
using std::cin;
using std::cout;

void ProcessSMF(UINT format) {
	auto data = GetClipboardData(format);
	if (!data) {
		cerr << "Error getting the clipboard data: " << GetLastError() << "\n";
		return;
	}

	auto size = GlobalSize(data);
	if (!size) {
		cerr << "Error getting the clipboard data size: " << GetLastError() << "\n";
		return;
	}

	auto ptr = GlobalLock(data);
	if (!ptr) {
		cerr << "Error locking the clipboard data: " << GetLastError() << "\n";
		return;
	}

	auto copiedString = reinterpret_cast<char*>(std::malloc(size + 1));
	copiedString[size] = 0; // Add 0 manually for correct output.
	std::memcpy(copiedString, ptr, size);

	// Don't worry if the clipboard data was locked more than once.
	if (!GlobalUnlock(data)) {
		auto err = GetLastError();
		if (err != NO_ERROR)
			cerr << "Error unlocking the clipboard data: " << GetLastError() << "\n";
	}

	cout << copiedString;

	std::free(copiedString);
}

void usage() {
	cerr << "Usage:\n\tSkypeClipboard.exe -i\t- Read from stdin, put into the clipboard.\n\tSkypeClipboard.exe -o\t- Read from the clipboard, put into stdout.\n";
}

int main(int argc, char* argv[]) {
	if (argc != 2 || std::strlen(argv[1]) != 2) {
		usage();
		return 1;
	}

	switch (argv[1][1]) {
	case 'o':
	{
		if (!OpenClipboard(NULL)) {
			cerr << "Error opening clipboard: " << GetLastError() << "\n";
			return 1;
		}

		auto format = EnumClipboardFormats(0);
		for (;;) {
			if (!format) {
				auto error = GetLastError();
				if (error != ERROR_SUCCESS) {
					cerr << "Error enumerating clipboard formats: " << error << "\n";
					return 1;
				}
				break;
			}

			char formatName[21];
			if (GetClipboardFormatNameA(format, formatName, sizeof(formatName)) && !std::strcmp(formatName, "SkypeMessageFragment"))
				ProcessSMF(format);

			format = EnumClipboardFormats(format);
		}

		if (!CloseClipboard())
			cerr << "Error closing clipboard: " << GetLastError() << "\n";
	} break;

	case 'i':
	{
		auto console_window = GetConsoleWindow();
		if (!console_window) {
			cerr << "Error getting console window: " << GetLastError() << "\n";
			return 1;
		}

		auto format = RegisterClipboardFormat(TEXT("SkypeMessageFragment"));
		if (!format) {
			cerr << "Error registering the clipboard format: " << GetLastError() << "\n";
			return 1;
		}

		cin.seekg(0, std::ios::end);
		auto size = cin.tellg();
		cin.seekg(0, std::ios::beg);

		auto data = GlobalAlloc(GMEM_MOVEABLE, size);
		if (!data) {
			cerr << "Error allocating memory: " << GetLastError() << "\n";
			return 1;
		}

		auto ptr = GlobalLock(data);
		if (!ptr) {
			cerr << "Error locking memory: " << GetLastError() << "\n";
			if (GlobalFree(data))
				cerr << "Error freeing memory: " << GetLastError() << "\n";
			return 1;
		}

		cin.read(reinterpret_cast<char*>(ptr), size);

		if (GlobalUnlock(data)) {
			cerr << "Error: memory was locked more than once.\n";
			if (GlobalFree(data))
				cerr << "Error freeing memory: " << GetLastError() << "\n";
			return 1;
		} else {
			auto err = GetLastError();
			if (err != NO_ERROR) {
				cerr << "Error unlocking memory: " << GetLastError() << "\n";
				if (GlobalFree(data))
					cerr << "Error freeing memory: " << GetLastError() << "\n";
				return 1;
			}
		}

		if (!OpenClipboard(console_window)) {
			cerr << "Error opening clipboard: " << GetLastError() << "\n";
			return 1;
		}

		if (!SetClipboardData(format, data)) {
			cerr << "Error setting clipboard data: " << GetLastError() << "\n";
			return 1;
		}

		if (!CloseClipboard())
			cerr << "Error closing clipboard: " << GetLastError() << "\n";
	} break;

	default:
	{
		usage();
		return 1;
	}
	}

	return 0;
}