3 # Read #define's and translate to Python code.
4 # Handle #include statements.
5 # Handle #define macros with one argument.
6 # Anything that isn't recognized or doesn't translate into valid
9 # Without filename arguments, acts as a filter.
10 # If one or more filenames are given, output is written to corresponding
11 # filenames in the local directory, translated to all uppercase, with
12 # the extension replaced by ".py".
14 # By passing one or more options of the form "-i regular_expression"
15 # you can specify additional strings to be ignored. This is useful
16 # e.g. to ignore casts to u_long: simply specify "-i '(u_long)'".
19 # - turn trailing C comments into Python comments
20 # - turn C Boolean operators "&& || !" into Python "and or not"
21 # - what to do about #if(def)?
22 # - what to do about macros with multiple parameters?
24 import sys, re, getopt, os
26 p_define = re.compile('^[\t ]*#[\t ]*define[\t ]+([a-zA-Z0-9_]+)[\t ]+')
29 '^[\t ]*#[\t ]*define[\t ]+'
30 '([a-zA-Z0-9_]+)\(([_a-zA-Z][_a-zA-Z0-9]*)\)[\t ]+')
32 p_include = re.compile('^[\t ]*#[\t ]*include[\t ]+<([a-zA-Z0-9_/\.]+)')
34 p_comment = re.compile(r'/\*([^*]+|\*+[^/])*(\*+/)?')
35 p_cpp_comment = re.compile('//.*')
37 ignores = [p_comment, p_cpp_comment]
39 p_char = re.compile(r"'(\\.[^\\]*|[^\\])'")
41 p_hex = re.compile(r"0x([0-9a-fA-F]+)L?")
47 searchdirs=os.environ['include'].split(';')
50 searchdirs=os.environ['INCLUDE'].split(';')
53 if sys.platform.find("beos") == 0:
54 searchdirs=os.environ['BEINCLUDES'].split(';')
55 elif sys.platform.startswith("atheos"):
56 searchdirs=os.environ['C_INCLUDE_PATH'].split(':')
60 searchdirs=['/usr/include']
64 opts, args = getopt.getopt(sys.argv[1:], 'i:')
67 ignores.append(re.compile(a))
72 sys.stdout.write('# Generated by h2py from stdin\n')
73 process(sys.stdin, sys.stdout)
75 fp = open(filename, 'r')
76 outfile = os.path.basename(filename)
77 i = outfile.rfind('.')
78 if i > 0: outfile = outfile[:i]
79 modname = outfile.upper()
80 outfile = modname + '.py'
81 outfp = open(outfile, 'w')
82 outfp.write('# Generated by h2py from %s\n' % filename)
84 for dir in searchdirs:
85 if filename[:len(dir)] == dir:
86 filedict[filename[len(dir)+1:]] = None # no '/' trailing
87 importable[filename[len(dir)+1:]] = modname
94 # replace ignored patterns by spaces
96 body = p.sub(' ', body)
97 # replace char literals by ord(...)
98 body = p_char.sub("ord('\\1')", body)
99 # Compute negative hexadecimal constants
101 UMAX = 2*(sys.maxint+1)
103 m = p_hex.search(body, start)
106 val = long(body[slice(*m.span(1))], 16)
109 body = body[:s] + "(" + str(val) + ")" + body[e:]
113 def process(fp, outfp, env = {}):
119 match = p_define.match(line)
121 # gobble up continuation lines
122 while line[-2:] == '\\\n':
123 nextline = fp.readline()
124 if not nextline: break
126 line = line + nextline
127 name = match.group(1)
128 body = line[match.end():]
131 stmt = '%s = %s\n' % (name, body.strip())
135 sys.stderr.write('Skipping: %s' % stmt)
138 match = p_macro.match(line)
140 macro, arg = match.group(1, 2)
141 body = line[match.end():]
143 stmt = 'def %s(%s): return %s\n' % (macro, arg, body)
147 sys.stderr.write('Skipping: %s' % stmt)
150 match = p_include.match(line)
155 if importable.has_key(filename):
156 outfp.write('from %s import *\n' % importable[filename])
157 elif not filedict.has_key(filename):
158 filedict[filename] = None
160 for dir in searchdirs:
162 inclfp = open(dir + '/' + filename)
168 '\n# Included from %s\n' % filename)
169 process(inclfp, outfp, env)
171 sys.stderr.write('Warning - could not find file %s\n' %
174 if __name__ == '__main__':