GameBoy color emulator opcodes automation

Question

I'm writting a GameBoy color emulator in C, just to introduce myself into this world, it is interpreted, nothing of dynamic or static recompilation :P

Now I'm right in the tedious task of implementing all the CPU opcodes in C code, I have to write all these: http://www.pastraiser.com/cpu/gameboy/gameboy_opcodes.html and I don't want to take them from another emulator.

The question is, is there some way to automate the opcodes writting? Maybe it's a silly question and it will have a silly answer, but I want to work as less as possible. :)