Initial commit

tools/cml2header.py

@@ -0,0 +1,144 @@
+#!/usr/bin/python
+
+import os
+import sys
+import re
+import StringIO
+import getopt
+
+class cml2header_translator:
+	'''
+	Translates a cml2 configuration file to a C header file
+	that can be included in source code.
+	'''
+	def __init__(self):
+		self.isnotset = re.compile("^# (.*) is not set")
+
+	def linetrans(self, instream, outstream, trailer=None):
+		'''
+		Translates a stream line-by-line
+		'''
+		if not hasattr(instream, "readline"):
+			instream = open(instream, "r")
+		if not hasattr(outstream, "readline"):
+			outstream = open(outstream, "w")
+		while 1:
+			line = instream.readline()
+			if not line:
+				break
+			new = self.write_include(line)
+			if new:
+				outstream.write(new)
+		instream.close()
+		if trailer:
+			outstream.write(trailer)
+		outstream.close()
+
+	def write_include(self, line):
+		'''
+		Translate a line of CML2 config file statement into
+		C preprocessor #define format.
+		'''
+		if line.find("PRIVATE") > -1 or line[:2] == "$$":
+			return ""
+		match = self.isnotset.match(line)
+		if match:
+			return "#undef  %s\n" % match.group(1)
+		if line == "#\n":
+			return None
+		elif line[0] == "#":
+			return "/* " + line[1:].strip() + " */\n"
+		eq = line.find("=")
+		if eq == -1:
+			return line
+		else:
+			line = line.split('#')[0]
+			symbol = line[:eq]
+			value = line[eq+1 :].strip()
+		if value == 'y':
+			return "#define %s 1\n" % symbol
+		elif value == 'm':
+			return "#undef %s\n#define %s_MODULE 1\n" % (symbol, symbol)
+		elif value == 'n':
+			return "#undef  %s\n" % symbol
+		else:
+			return "#define %s %s\n" % (symbol, value)
+
+	def cml_configfile_exists(self, path):
+		if not os.path.exists(path):
+			print "CML2 configuration file not found."
+			print "Given path:", path, "does not exist."
+			return 0
+		else:
+			return 1
+
+	def translate(self, configfile_path = None, headerfile_path = None):
+
+		if configfile_path == None:
+			configfile_path = os.getcwd() + '/' + "config.out"
+
+		if headerfile_path == None:
+			headerfile_path = os.getcwd() + '/' + "config.h"
+		'''
+		Takes a configuration file generated by the cml2 configurator,
+		and converts it to a C header file. This header file is	then
+		included by the kernel sources and the preprocessor definitions
+		in it are used during the compilation of the kernel.
+		'''
+		if not self.cml_configfile_exists(configfile_path):
+			print "Failed to translate cml configuration file", configfile_path, 'to', headerfile_path
+			return -1
+
+		self.linetrans(configfile_path, headerfile_path)
+		return 0
+
+	def usage(self):
+		helpstr =	\
+		'''\
+    Description:
+    cml2header.py takes a cml2 configuration file as input and generates
+    a valid C header file to be included in C source code.
+
+    Usage:
+    cml2header.py -i inputfile -o outputfile [-h]
+
+    Options:
+	-i    The CML2 configuration file	(config.out by default)
+	-o    The name of the header file	(config.h by default)
+	-h    This help message
+		'''
+		print helpstr
+
+def main():
+	translator = cml2header_translator()
+	try:
+		opts, args = getopt.getopt(sys.argv[1:], "i:o:h:")
+	except getopt.GetoptError:
+		# print help information and exit:
+		translator.usage()
+		sys.exit(2)
+
+	ofile = None
+	ifile = None
+
+	# Print help message if requested and quit
+	if '-h' in opts:
+		translator.usage()
+		sys.exit()
+
+	# Get the input and output filenames.
+	for switch, val in opts:
+        	if switch == '-i':
+			ifile = val
+		if switch == '-o':
+			ofile = val
+
+	# Translate
+	if translator.translate(ifile, ofile) < 0:
+		print "Translation of", ifile, 'to', ofile, 'failed.'
+
+# Run the main routine only if this file is explicitly executed.
+# (i.e. not referred from another module)
+if __name__ == "__main__":
+    main()
+