getNumberOfDataDirectories

pub fn getNumberOfDataDirectories(self: Coff) u32 {
    const hdr = self.getOptionalHeader();
    return switch (hdr.magic) {
        IMAGE_NT_OPTIONAL_HDR32_MAGIC => self.getOptionalHeader32().number_of_rva_and_sizes,
        IMAGE_NT_OPTIONAL_HDR64_MAGIC => self.getOptionalHeader64().number_of_rva_and_sizes,
        else => unreachable, // We assume we have validated the header already
    };
}