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'''
Processes a C source file, adding debugging information.
Similar to autodebugger.py, but runs on .c files
'''
import os, sys, re
filename, ofilename = sys.argv[1], sys.argv[2]
f = open(filename, 'r')
data = f.read()
f.close()
lines = data.split('\n')
for i in range(len(lines)):
m = re.match('^ [ ]*([\w\d \[\]]+) = +([^;]+);$', lines[i])
if m and (' if ' not in lines[i-1] or '{' in lines[i-1]) and \
(' if ' not in lines[i+1] or '{' in lines[i+1]) and \
(' else' not in lines[i-1] or '{' in lines[i-1]) and \
(' else' not in lines[i+1] or '{' in lines[i+1]):
var = m.groups(1)[0].rstrip().split(' ')[-1]
lines[i] += ''' printf("%d:%s=%%d\\n", %s);''' % (i+1, var, var)
f = open(ofilename, 'w')
f.write('\n'.join(lines))
f.close()
print 'Success.'
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