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Size: 1.29 KB
Versions: 17
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Stored size: 1.29 KB
Contents
class PreprocessinatorExtractor
constructor :file_wrapper
# extract from cpp-processed file only content of file we care about
def extract_base_file_from_preprocessed_expansion(filepath)
contents = []
extract = false
# preprocessing by way of toolchain preprocessor expands macros, eliminates comments, strips out #ifdef code, etc.
# however, it also expands in place each #include'd file.
# so, we must extract only the lines of the file that belong to the file originally preprocessed
# iterate through all lines and alternate between extract and ignore modes
# all lines between a '#'line containing file name of our filepath and the next '#'line should be extracted
@file_wrapper.readlines(filepath).each do |line|
if (extract)
# flip to ignore mode if line begins with '#' except if it's a #pragma line
if ((line =~ /^#/) and not (line =~ /#\s*pragma/))
extract = false
# otherwise, extract the line
else
contents << line
end
end
# enable extract mode if line matches preprocessor expression for our original file name
extract = true if (line =~ /^#.*(\s|\/|\\|\")#{Regexp.escape(File.basename(filepath))}/)
end
return contents
end
end
Version data entries
17 entries across 17 versions & 1 rubygems