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31 lines
1.1 KiB
Ruby
31 lines
1.1 KiB
Ruby
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class PreprocessinatorExtractor
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def extract_base_file_from_preprocessed_expansion(filepath)
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# preprocessing by way of toolchain preprocessor expands macros, eliminates
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# comments, strips out #ifdef code, etc. however, it also expands in place
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# each #include'd file. so, we must extract only the lines of the file
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# that belong to the file originally preprocessed
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# iterate through all lines and alternate between extract and ignore modes
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# all lines between a '#'line containing file name of our filepath and the
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# next '#'line should be extracted
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base_name = File.basename(filepath)
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not_pragma = /^#(?!pragma\b)/ # preprocessor directive that's not a #pragma
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pattern = /^#.*(\s|\/|\\|\")#{Regexp.escape(base_name)}/
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found_file = false # have we found the file we care about?
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lines = []
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File.readlines(filepath).each do |line|
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if found_file and not line.match(not_pragma)
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lines << line
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else
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found_file = false
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end
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found_file = true if line.match(pattern)
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end
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return lines
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end
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end
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