Function concat

IDEHelper/VSSupport.cpp:197–221

}

wchar_t *concat(wchar_t *a, wchar_t *b, wchar_t *c = nullptr, wchar_t *d = nullptr) {
	// Concatenate up to 4 wide strings together. Allocated with malloc.
	// If you don't like that, use a programming language that actually
	// helps you with using custom allocators. Or just edit the code.

	auto len_a = wcslen(a);
	auto len_b = wcslen(b);

	auto len_c = 0;
	if (c) len_c = (int)wcslen(c);

	auto len_d = 0;
	if (d) len_d = (int)wcslen(d);

	wchar_t *result = (wchar_t *)malloc((len_a + len_b + len_c + len_d + 1) * 2);
	memcpy(result, a, len_a * 2);
	memcpy(result + len_a, b, len_b * 2);

	if (c) memcpy(result + len_a + len_b, c, len_c * 2);
	if (d) memcpy(result + len_a + len_b + len_c, d, len_d * 2);

	result[len_a + len_b + len_c + len_d] = 0;

	return result;
}

typedef void(*Visit_Proc_W)(wchar_t *short_name, wchar_t *full_name, Version_Data *data);
bool visit_files_w(wchar_t *dir_name, Version_Data *data, Visit_Proc_W proc) {