mirror of https://github.com/python/cpython
272 lines
6.1 KiB
Python
272 lines
6.1 KiB
Python
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#! /bin/env python
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""" Dump data about a Metrowerks archive file.
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$Id$
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Based on reverse-engineering the library file format.
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Copyright (C) 1997 Chris Herborth (chrish@qnx.com)
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"""
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# ----------------------------------------------------------------------
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# Standard modules
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import sys
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import getopt
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import string
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import time
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# ----------------------------------------------------------------------
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def usage():
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""" Display a usage message and exit.
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"""
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print "dumpar [-v] library1 [library2 ... libraryn]"
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print
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print "Attempt to display some useful information about the contents"
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print "of the given Metrowerks library file(s)."
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print
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print "-v Be verbose (displays offsets along with the data)"
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raise SystemExit
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# ----------------------------------------------------------------------
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def mk_long( str ):
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""" convert a 4-byte string into a number
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Assumes big-endian!
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"""
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if len( str ) < 4:
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raise ValueError, "str must be 4 bytes long"
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num = ord( str[3] )
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num = num + ord( str[2] ) * 0x100
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num = num + ord( str[1] ) * 0x10000
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num = num + ord( str[0] ) * 0x1000000
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return num
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# ----------------------------------------------------------------------
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def str2hex( str ):
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""" convert a string into a string of hex numbers
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"""
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ret = []
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for c in str:
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h = hex( ord( c ) )
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ret.append( string.zfill( "%s" % ( h[2:] ), 2 ) )
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return string.join( ret )
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# ----------------------------------------------------------------------
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def print_offset( offset ):
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""" print the offset nicely
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"""
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# Turn the offset into a hex number and strip off the leading "0x".
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val = "%s" % ( hex( offset ) )
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val = val[2:]
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out = "0x" + string.zfill( val, 8 )
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print out,
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# ----------------------------------------------------------------------
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def get_string( data ):
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""" dig a C string out of a data stream
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returns the string
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"""
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len = 0
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while data[len] != '\0':
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len = len + 1
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return data[:len]
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# ----------------------------------------------------------------------
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def dump_lib( file, verbose ):
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""" dump information about a Metrowerks library file
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"""
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offset = 0
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print "Dumping library:", file
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# Attempt to read the data.
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try:
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data = open( file ).read()
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except IOError, retval:
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print "*** Unable to open file %s: %s" % ( file, retval[1] )
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return
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# Check the magic number.
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if verbose:
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print_offset( offset )
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print "Magic:",
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magic = data[offset:offset + 8]
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print "'%s'" % ( magic )
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if magic != "MWOBPPC ":
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print "*** Invalid magic number!"
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return
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offset = offset + 8
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# File flags
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if verbose:
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print_offset( offset )
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print "file flags:",
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print mk_long( data[offset:offset + 4] )
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offset = offset + 4
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if verbose:
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print_offset( offset )
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print "file version:",
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print mk_long( data[offset:offset + 4] )
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offset = offset + 4
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# code size
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if verbose:
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print_offset( offset )
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print "code size:", mk_long( data[offset:offset + 4] )
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offset = offset + 4
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# data size
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if verbose:
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print_offset( offset )
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print "data size:", mk_long( data[offset:offset + 4] )
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offset = offset + 4
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# number of objects
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if verbose:
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print_offset( offset )
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print "number of objects:",
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num_objs = mk_long( data[offset:offset + 4] )
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print num_objs
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offset = offset + 4
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print
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# Now loop through the objects.
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obj_sizes = [ 0, ] * num_objs
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obj_data_offsets = [ 0, ] * num_objs
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for obj in range( num_objs ):
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# Magic?
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if verbose:
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print_offset( offset )
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print "modification time:",
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modtime = mk_long( data[offset:offset + 4] )
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print "[%s]" % ( ( time.localtime( modtime ), ) )
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offset = offset + 4
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# Offsets?
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if verbose:
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print_offset( offset )
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print "file name offset 1:",
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file_offset1 = mk_long( data[offset:offset + 4] )
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unknown = "%s" % ( hex( file_offset1 ) )
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print "%s (%s)" % ( unknown, str2hex( data[offset:offset + 4] ) )
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offset = offset + 4
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if verbose:
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print_offset( offset )
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print "file name offset 2:",
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file_offset2 = mk_long( data[offset:offset + 4] )
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unknown = "%s" % ( hex( file_offset2 ) )
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print "%s (%s)" % ( unknown, str2hex( data[offset:offset + 4] ) )
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offset = offset + 4
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# Extra -1 for NUL character.
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print " >>>> File name should be %s characters." % \
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( file_offset2 - file_offset1 - 1)
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if verbose:
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print_offset( offset )
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print "object data offset:",
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file_data_offset = mk_long( data[offset:offset + 4] )
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unknown = "%s" % ( hex( file_data_offset ) )
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print "%s (%s)" % ( unknown, str2hex( data[offset:offset + 4] ) )
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obj_data_offsets[obj] = file_data_offset
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offset = offset + 4
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# object size
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if verbose:
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print_offset( offset )
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print "object size:",
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obj_sizes[obj] = mk_long( data[offset:offset + 4] )
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print "%s bytes" % ( obj_sizes[obj] )
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offset = offset + 4
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print
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# Now loop through the object names.
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for obj in range( num_objs ):
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# First name
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if verbose:
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print_offset( offset )
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print "object",
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print obj,
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print "name 1:",
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name1 = get_string( data[offset:] )
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print "[%s] %s chars" % ( name1, len( name1 ) )
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offset = offset + len( name1 ) + 1
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# Second name
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if verbose:
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print_offset( offset )
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print "object",
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print obj,
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print "name 2:",
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name2 = get_string( data[offset:] )
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print "[%s] %s chars" % ( name2, len( name1 ) )
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offset = offset + len( name2 ) + 1
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# See if we've got a magic cookie in the object data
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if verbose:
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print_offset( obj_data_offsets[obj] )
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cookie = data[obj_data_offsets[obj]:obj_data_offsets[obj] + 8]
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print "object",
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print obj,
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print "cookie: '%s'" % ( cookie )
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print
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# Now loop through the data and check for magic numbers there.
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return
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# ----------------------------------------------------------------------
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def main():
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""" mainline
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"""
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# Set up some defaults
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be_verbose = 0
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# First, check the command-line arguments
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try:
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opt, args = getopt.getopt( sys.argv[1:], "vh?" )
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except getopt.error:
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print "*** Error parsing command-line options!"
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usage()
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for o in opt:
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if o[0] == "-h" or o[0] == "-?":
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usage()
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elif o[0] == "-v":
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be_verbose = 1
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else:
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print "*** Unknown command-line option!"
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usage()
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# Now we can attempt to dump info about the arguments.
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for lib in args:
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dump_lib( lib, be_verbose )
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if __name__ == "__main__":
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main()
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