Add line length checker script

scripts/line_length_checker.py

@@ -0,0 +1,70 @@
+import re
+import sys
+
+def getValue(line: str, key: str, default = None):
+    """Convenience function that finds the value in a line of g-code.
+    When requesting key = x from line "G1 X100" the value 100 is returned.
+    """
+    if not key in line or (';' in line and line.find(key) > line.find(';')):
+        return default
+    sub_part = line[line.find(key) + 1:]
+    m = re.search('^-?[0-9]+\.?[0-9]*', sub_part)
+    if m is None:
+        return default
+    try:
+        return int(m.group(0))
+    except ValueError: #Not an integer.
+        try:
+            return float(m.group(0))
+        except ValueError: #Not a number at all.
+            return default
+
+def analyse(gcode, distance_to_report, print_layers = False):
+	lines_found = 0
+	previous_x = 0
+	previous_y = 0
+	dist_squared = distance_to_report * distance_to_report
+	current_layer = 0
+	for line in gcode.split("\n"):
+		if not line.startswith("G1"):
+			if line.startswith(";LAYER:"):
+				previous_x = 0
+				previous_y = 0
+				current_layer += 1
+			continue
+		current_x = getValue(line, "X")
+		current_y = getValue(line, "Y")
+		if current_x is None or current_y is None:
+			continue
+		diff_x = current_x - previous_x
+		diff_y = current_y - previous_y
+		if diff_x * diff_x + diff_y * diff_y < dist_squared:
+			lines_found += 1
+			if print_layers:
+				print("[!] ", distance_to_report, " layer ", current_layer, " ", previous_x, previous_y)
+		previous_y = current_y
+		previous_x = current_x
+	return lines_found
+	
+def loadAndPrettyPrint(file_name):
+	print(file_name.replace(".gcode",""))
+	with open(file_name) as f:
+		data = f.read()
+	print("| Line length | Num segments |")
+	print("| ------------- | ------------- |")
+	print("| 1 |", analyse(data, 1), "|")
+	print("| 0.5 |", analyse(data, 0.5), "|")
+	print("| 0.1 |", analyse(data, 0.1), "|")
+	print("| 0.05 |", analyse(data, 0.05), "|")
+	print("| 0.01 |", analyse(data, 0.01), "|")
+	print("| 0.005 |", analyse(data, 0.005), "|")
+	print("| 0.001 |", analyse(data, 0.001), "|")
+
+
+if __name__ == "__main__":
+    if len(sys.argv) != 2 :
+        print("Usage: <input g-code>")
+        sys.exit(1)
+    
+    in_filename = sys.argv[1]
+    loadAndPrettyPrint(sys.argv[1])