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117 lines
3.5 KiB
117 lines
3.5 KiB
3 years ago
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import re
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import sys
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import subprocess
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__doc__ = """This module generates a DEF file from the symbols in
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an MSVC-compiled DLL import library. It correctly discriminates between
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data and functions. The data is collected from the output of the program
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nm(1).
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Usage:
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python lib2def.py [libname.lib] [output.def]
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or
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python lib2def.py [libname.lib] > output.def
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libname.lib defaults to python<py_ver>.lib and output.def defaults to stdout
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Author: Robert Kern <kernr@mail.ncifcrf.gov>
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Last Update: April 30, 1999
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"""
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__version__ = '0.1a'
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py_ver = "%d%d" % tuple(sys.version_info[:2])
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DEFAULT_NM = ['nm', '-Cs']
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DEF_HEADER = """LIBRARY python%s.dll
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;CODE PRELOAD MOVEABLE DISCARDABLE
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;DATA PRELOAD SINGLE
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EXPORTS
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""" % py_ver
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# the header of the DEF file
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FUNC_RE = re.compile(r"^(.*) in python%s\.dll" % py_ver, re.MULTILINE)
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DATA_RE = re.compile(r"^_imp__(.*) in python%s\.dll" % py_ver, re.MULTILINE)
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def parse_cmd():
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"""Parses the command-line arguments.
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libfile, deffile = parse_cmd()"""
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if len(sys.argv) == 3:
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if sys.argv[1][-4:] == '.lib' and sys.argv[2][-4:] == '.def':
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libfile, deffile = sys.argv[1:]
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elif sys.argv[1][-4:] == '.def' and sys.argv[2][-4:] == '.lib':
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deffile, libfile = sys.argv[1:]
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else:
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print("I'm assuming that your first argument is the library")
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print("and the second is the DEF file.")
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elif len(sys.argv) == 2:
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if sys.argv[1][-4:] == '.def':
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deffile = sys.argv[1]
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libfile = 'python%s.lib' % py_ver
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elif sys.argv[1][-4:] == '.lib':
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deffile = None
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libfile = sys.argv[1]
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else:
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libfile = 'python%s.lib' % py_ver
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deffile = None
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return libfile, deffile
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def getnm(nm_cmd=['nm', '-Cs', 'python%s.lib' % py_ver], shell=True):
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"""Returns the output of nm_cmd via a pipe.
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nm_output = getnm(nm_cmd = 'nm -Cs py_lib')"""
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p = subprocess.Popen(nm_cmd, shell=shell, stdout=subprocess.PIPE,
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stderr=subprocess.PIPE, text=True)
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nm_output, nm_err = p.communicate()
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if p.returncode != 0:
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raise RuntimeError('failed to run "%s": "%s"' % (
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' '.join(nm_cmd), nm_err))
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return nm_output
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def parse_nm(nm_output):
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"""Returns a tuple of lists: dlist for the list of data
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symbols and flist for the list of function symbols.
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dlist, flist = parse_nm(nm_output)"""
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data = DATA_RE.findall(nm_output)
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func = FUNC_RE.findall(nm_output)
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flist = []
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for sym in data:
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if sym in func and (sym[:2] == 'Py' or sym[:3] == '_Py' or sym[:4] == 'init'):
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flist.append(sym)
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dlist = []
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for sym in data:
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if sym not in flist and (sym[:2] == 'Py' or sym[:3] == '_Py'):
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dlist.append(sym)
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dlist.sort()
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flist.sort()
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return dlist, flist
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def output_def(dlist, flist, header, file = sys.stdout):
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"""Outputs the final DEF file to a file defaulting to stdout.
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output_def(dlist, flist, header, file = sys.stdout)"""
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for data_sym in dlist:
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header = header + '\t%s DATA\n' % data_sym
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header = header + '\n' # blank line
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for func_sym in flist:
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header = header + '\t%s\n' % func_sym
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file.write(header)
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if __name__ == '__main__':
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libfile, deffile = parse_cmd()
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if deffile is None:
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deffile = sys.stdout
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else:
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deffile = open(deffile, 'w')
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nm_cmd = DEFAULT_NM + [str(libfile)]
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nm_output = getnm(nm_cmd, shell=False)
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dlist, flist = parse_nm(nm_output)
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output_def(dlist, flist, DEF_HEADER, deffile)
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