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84 lines
2.8 KiB
Python
84 lines
2.8 KiB
Python
"""
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PRC (Palm resource) parser.
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Author: Sebastien Ponce
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Creation date: 29 october 2008
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"""
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from hachoir.parser import Parser
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from hachoir.field import (FieldSet,
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UInt16, UInt32, TimestampMac32,
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String, RawBytes)
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from hachoir.core.endian import BIG_ENDIAN
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class PRCHeader(FieldSet):
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static_size = 78 * 8
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def createFields(self):
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yield String(self, "name", 32, "Name")
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yield UInt16(self, "flags", "Flags")
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yield UInt16(self, "version", "Version")
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yield TimestampMac32(self, "create_time", "Creation time")
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yield TimestampMac32(self, "mod_time", "Modification time")
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yield TimestampMac32(self, "backup_time", "Backup time")
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yield UInt32(self, "mod_num", "mod num")
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yield UInt32(self, "app_info", "app info")
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yield UInt32(self, "sort_info", "sort info")
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yield UInt32(self, "type", "type")
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yield UInt32(self, "id", "id")
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yield UInt32(self, "unique_id_seed", "unique_id_seed")
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yield UInt32(self, "next_record_list", "next_record_list")
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yield UInt16(self, "num_records", "num_records")
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class ResourceHeader(FieldSet):
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static_size = 10 * 8
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def createFields(self):
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yield String(self, "name", 4, "Name of the resource")
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yield UInt16(self, "flags", "ID number of the resource")
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yield UInt32(self, "offset", "Pointer to the resource data")
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def createDescription(self):
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return "Resource Header (%s)" % self["name"]
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class PRCFile(Parser):
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PARSER_TAGS = {
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"id": "prc",
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"category": "program",
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"file_ext": ("prc", ""),
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"min_size": ResourceHeader.static_size, # At least one program header
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"mime": (
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"application/x-pilot-prc",
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"application/x-palmpilot"),
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"description": "Palm Resource File"
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}
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endian = BIG_ENDIAN
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def validate(self):
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# FIXME: Implement the validation function!
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return False
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def createFields(self):
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# Parse header and program headers
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yield PRCHeader(self, "header", "Header")
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lens = []
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firstOne = True
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poff = 0
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for index in range(self["header/num_records"].value):
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r = ResourceHeader(self, "res_header[]")
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if firstOne:
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firstOne = False
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else:
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lens.append(r["offset"].value - poff)
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poff = r["offset"].value
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yield r
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lens.append(self.size // 8 - poff)
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yield UInt16(self, "placeholder", "Place holder bytes")
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for i in range(len(lens)):
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yield RawBytes(self, "res[]", lens[i], '"' + self["res_header[" + str(i) + "]/name"].value + "\" Resource")
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def createDescription(self):
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return "Palm Resource file"
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