add C_code_chars_count.py

python-programming/C_code_chars_count.py

@@ -0,0 +1,49 @@
+#!/usr/bin/python3
+
+# C_code_chars_count.py
+#
+# Author: Intel A80486DX2-66
+# License: Creative Commons Zero 1.0 Universal or Unlicense
+# SPDX-License-Identifier: CC0-1.0 OR Unlicense
+
+from os.path import basename
+from sys import argv
+import re
+
+comment_stripping_regex = \
+	re.compile(r"(?:\/\*(?:[^*]|[\n]|(?:\*+(?:[^*\/]|\n])))*\*+\/)|(?:\/\/.*)",
+	           re.MULTILINE | re.DOTALL)
+
+
+def count_code_size(lines, **strip):
+	if not strip:
+		strip["comments"] = True
+		strip["empty_lines"] = True
+
+	old_size = sum(len(line) for line in lines)
+
+	if strip["empty_lines"]:
+		lines = [line for line in lines if line.strip()]
+	if strip["comments"]:
+		lines = re.sub(comment_stripping_regex, "", "\n".join(lines)) \
+				.replace("\n", "")
+
+	new_size = sum(len(line) for line in lines)
+	return [new_size, old_size]
+
+
+if __name__ == "__main__":
+	if len(argv) < 2:
+		print(f"Usage: {basename(argv[0])} <source code file path>")
+		exit(1)
+
+	with open(argv[1], "r", encoding="utf-8-sig") as file:
+		code_chars, all_chars = count_code_size(file.read().splitlines())
+
+	percent_of_code = (code_chars * 100) / all_chars
+	display_percent_of_code = "(%.2f%%)" % percent_of_code
+	print("Code characters:", code_chars, display_percent_of_code)
+
+	percent_of_coms = ((all_chars - code_chars) * 100) / all_chars
+	display_percent_of_coms = "(%.2f%% of comments)" % percent_of_coms
+	print("All characters:", all_chars, display_percent_of_coms)