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80 lines
1.9 KiB
80 lines
1.9 KiB
#!/usr/bin/python
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#
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# Extract function call names from source C/H files.
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#
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# Useful for e.g. hunting non-Duktape library calls. Function calls can
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# also be determined from object files, but some function calls are
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# compilation option specific, so it's better to find them from source
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# files.
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#
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# Example run:
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#
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# $ python util/find_func_calls.py src/*.c src/*.h | \
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# grep -v -i -P ^duk_ | grep -v -P '^(sizeof|va_start|va_end|va_arg)' | \
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# sort | uniq | less
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#
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import os
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import sys
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import re
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re_linecont = re.compile(r'\\\n')
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re_comment = re.compile(r'/\*.*?\*/', re.DOTALL)
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re_func_call = re.compile(r'([A-Za-z_][A-Za-z0-9_]+)\(')
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re_string = re.compile(r'"(\\"|[^"])*"')
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def stripLineContinuations(x):
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res = re.sub(re_linecont, ' ', x)
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#print(res)
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return res
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def stripComments(x):
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res = re.sub(re_comment, '/*omit*/', x)
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#print(res)
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return res
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def stripStrings(x):
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res = re.sub(re_string, '"..."', x)
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#print(res)
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return res
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def findFuncCalls(d, fn):
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res = []
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for line in d.split('\n'):
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if len(line) >= 1 and line[0] == '#':
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# Preprocessor lines contain function call like
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# syntax but are not function calls.
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continue
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for m in re_func_call.finditer(line):
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res.append({
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'name': m.group(1),
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'filename': fn
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})
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return res
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def main():
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# Duktape code does not have a space between a function name and
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# an open parenthesis. If the regexp includes an optional space,
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# it will provide a lot of false matches.
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for fn in sys.argv[1:]:
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f = open(fn, 'rb')
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d = f.read()
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f.close()
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# Strip line continuations, comments, and strings so that
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# we minimize false matches.
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d = stripLineContinuations(d)
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d = stripComments(d)
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d = stripStrings(d)
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# Find function calls (close enough).
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for i in findFuncCalls(d, fn):
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#print '%s' % i['name']
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print '%-25s%s' % (i['name'], i['filename'])
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if __name__ == '__main__':
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main()
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