Totally new "freeze" program.

1 files changed, 91 insertions, 0 deletions

diff --git a/Tools/freeze/makefreeze.py b/Tools/freeze/makefreeze.py
new file mode 100644
index 0000000..4a3da99
--- /dev/null
+++ b/Tools/freeze/makefreeze.py
@@ -0,0 +1,91 @@
+import marshal
+
+
+# Write a file containing frozen code for the modules in the dictionary.
+
+header = """
+struct frozen {
+	char *name;
+	unsigned char *code;
+	int size;
+} frozen_modules[] = {
+"""
+trailer = """\
+	{0, 0, 0} /* sentinel */
+};
+"""
+
+def makefreeze(outfp, dict):
+	done = []
+	mods = dict.keys()
+	mods.sort()
+	for mod in mods:
+		modfn = dict[mod]
+		try:
+			str = makecode(modfn)
+		except IOError, msg:
+			sys.stderr.write("%s: %s\n" % (modfn, str(msg)))
+			continue
+		if str:
+			done.append(mod, len(str))
+			writecode(outfp, mod, str)
+	outfp.write(header)
+	for mod, size in done:
+		outfp.write('\t{"%s", M_%s, %d},\n' % (mod, mod, size))
+	outfp.write(trailer)
+
+
+# Return code string for a given module -- either a .py or a .pyc
+# file.  Return either a string or None (if it's not Python code).
+# May raise IOError.
+
+def makecode(filename):
+	if filename[-3:] == '.py':
+		f = open(filename, 'r')
+		try:
+			text = f.read()
+			code = compile(text, filename, 'exec')
+		finally:
+			f.close()
+		return marshal.dumps(code)
+	if filename[-4:] == '.pyc':
+		f = open(filename, 'rb')
+		try:
+			f.seek(8)
+			str = f.read()
+		finally:
+			f.close()
+		return str
+	# Can't generate code for this extension
+	return None
+
+
+# Write a C initializer for a module containing the frozen python code.
+# The array is called M_<mod>.
+
+def writecode(outfp, mod, str):
+	outfp.write('static unsigned char M_%s[] = {' % mod)
+	for i in range(0, len(str), 16):
+		outfp.write('\n\t')
+		for c in str[i:i+16]:
+			outfp.write('%d,' % ord(c))
+	outfp.write('\n};\n')
+
+
+# Test for the above functions.
+
+def test():
+	import os
+	import sys
+	if not sys.argv[1:]:
+		print 'usage: python freezepython.py file.py(c) ...'
+		sys.exit(2)
+	dict = {}
+	for arg in sys.argv[1:]:
+		base = os.path.basename(arg)
+		mod, ext = os.path.splitext(base)
+		dict[mod] = arg
+	makefreeze(sys.stdout, dict)
+
+if __name__ == '__main__':
+	test()