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