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annotate pytouhou/game/eclrunner.py @ 23:444ac7bca7bc

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Refacto ECL stuff, add support for a few instructions, and add some culling
author Thibaut Girka <thib@sitedethib.com>
date Fri, 12 Aug 2011 19:13:43 +0200
parents
children 93aa1b55d97c
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444ac7bca7bc Refacto ECL stuff, add support for a few instructions, and add some culling
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1 from struct import unpack
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2
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3
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4 class ECLRunner(object):
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5 def __init__(self, ecl, sub, frame=0, instruction_pointer=0, implementation=None):
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6 self.ecl = ecl
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7
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8 self.labels = {}
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9 self.implementation = {4: ('HHI', self.set_label),
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10 3: ('IHHHH', self.goto)}
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11 if implementation:
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12 self.implementation.update(implementation)
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13
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14 self.sub = sub
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15 self.frame = frame
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16 self.instruction_pointer = instruction_pointer
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19 def set_label(self, label, unknown, count):
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20 assert unknown == 0xffff
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21 self.labels[label] = (self.sub, self.instruction_pointer, count)
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22
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23
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24 def goto(self, frame, unknown1, unknown2, label, unknown3):
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25 try:
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26 sub, instruction_pointer, count = self.labels[label]
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27 except KeyError:
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28 pass
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29 else:
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30 count -= 1
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31 if count:
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32 self.labels[label] = sub, instruction_pointer, count
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33 else:
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34 del self.labels[label]
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35 self.frame = frame
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36 self.sub, self.instruction_pointer = sub, instruction_pointer
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38
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39 def update(self):
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40 frame = self.frame
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41 while frame <= self.frame:
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42 try:
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43 frame, instr_type, rank_mask, param_mask, args = self.ecl.subs[self.sub][self.instruction_pointer]
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44 except IndexError:
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45 break #TODO: script ended, destroy enemy
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46
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47 if frame == self.frame:
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48 try:
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49 format, callback = self.implementation[instr_type]
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50 except KeyError:
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51 print('Warning: unhandled opcode %d!' % instr_type) #TODO
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52 else:
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53 callback(*unpack('<' + format, args))
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54 self.instruction_pointer += 1
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55
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56 self.frame += 1
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57