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#! /usr/local/bin/python
# Read #define's from stdin and translate to Python code on stdout.
# Very primitive: non-#define's are ignored, no check for valid Python
# syntax is made -- you will have to edit the output in most cases.
# XXX To do:
# - accept filename arguments
# - turn trailing C comments into Python comments
# - turn C string quotes into Python comments
# - turn C Boolean operators "&& || !" into Python "and or not"
# - what to do about #if(def)?
# - what to do about macros with parameters?
# - reject definitions with semicolons in them
import sys, regex, string
p_define = regex.compile('^#[\t ]*define[\t ]+\([a-zA-Z0-9_]+\)[\t ]+')
p_comment = regex.compile('/\*\([^*]+\|\*+[^/]\)*\(\*+/\)?')
def main():
process(sys.stdin)
def process(fp):
lineno = 0
while 1:
line = fp.readline()
if not line: break
lineno = lineno + 1
if p_define.match(line) >= 0:
# gobble up continuation lines
while line[-2:] == '\\\n':
nextline = fp.readline()
if not nextline: break
lineno = lineno + 1
line = line + nextline
regs = p_define.regs
a, b = regs[1] # where the macro name is
name = line[a:b]
a, b = regs[0] # the whole match
body = line[b:]
# replace comments by spaces
while p_comment.search(body) >= 0:
a, b = p_comment.regs[0]
body = body[:a] + ' ' + body[b:]
print name, '=', string.strip(body)
main()
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