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51 lines
1.5 KiB
Python
51 lines
1.5 KiB
Python
"""
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Parallel Realities Starfighter .pak file parser
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See http://www.parallelrealities.co.uk/projects/starfighter.php
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or svn://svn.debian.org/svn/pkg-games/packages/trunk/starfighter/
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Author: Oliver Gerlich
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"""
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from hachoir.parser import Parser
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from hachoir.field import (UInt32, String, SubFile, FieldSet)
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from hachoir.core.endian import LITTLE_ENDIAN
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from hachoir.core.text_handler import filesizeHandler
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class FileEntry(FieldSet):
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def createFields(self):
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yield String(self, "filename", 56, truncate="\0")
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yield filesizeHandler(UInt32(self, "size"))
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yield SubFile(self, "data", self["size"].value, filename=self["filename"].value)
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def createDescription(self):
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return self["filename"].value
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class PRSPakFile(Parser):
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PARSER_TAGS = {
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"id": "prs_pak",
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"category": "archive",
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"file_ext": ("pak",),
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"mime": (u"application/octet-stream",),
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"min_size": 4 * 8, # just the identifier
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"magic": ((b'PACK', 0),),
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"description": "Parallel Realities Starfighter .pak archive",
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}
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endian = LITTLE_ENDIAN
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def validate(self):
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return (self.stream.readBytes(0, 4) == b'PACK'
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and self["file[0]/size"].value >= 0
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and len(self["file[0]/filename"].value) > 0)
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def createFields(self):
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yield String(self, "magic", 4)
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# all remaining data must be file entries:
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while self.current_size < self._size:
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yield FileEntry(self, "file[]")
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