1 files changed, 30 insertions, 0 deletions
diff --git a/tests/vendor/ceedling/lib/preprocessinator_extractor.rb b/tests/vendor/ceedling/lib/preprocessinator_extractor.rb
new file mode 100644
index 000000000..fd53a91f1
--- /dev/null
+++ b/tests/vendor/ceedling/lib/preprocessinator_extractor.rb
@@ -0,0 +1,30 @@
+class PreprocessinatorExtractor
+  def extract_base_file_from_preprocessed_expansion(filepath)
+    # 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
+
+    base_name  = File.basename(filepath)
+    not_pragma = /^#(?!pragma\b)/ # preprocessor directive that's not a #pragma
+    pattern    = /^#.*(\s|\/|\\|\")#{Regexp.escape(base_name)}/
+    found_file = false # have we found the file we care about?
+
+    lines = []
+    File.readlines(filepath).each do |line|
+      if found_file and not line.match(not_pragma)
+        lines << line
+      else
+        found_file = false
+      end
+
+      found_file = true if line.match(pattern)
+    end
+
+    return lines
+  end
+end