1 files changed, 37 insertions, 0 deletions
diff --git a/src/app/deflatetest/deflate.py b/src/app/deflatetest/deflate.py
new file mode 100755
index 0000000..3b1d9bd
--- /dev/null
+++ b/src/app/deflatetest/deflate.py
@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+
+import sys
+import zlib
+
+level = -1
+if len(sys.argv) > 2:
+    level = int(sys.argv[2])
+
+input_data = sys.argv[1].encode("utf-8")
+
+try:
+    with open(sys.argv[1], "rb") as f:
+        input_data = f.read()
+except FileNotFoundError:
+    input_data = sys.argv[1].encode("utf-8")
+
+output = zlib.compress(input_data, level=level)
+
+cinfo = (output[0] & 0xF0) >> 4
+window_size = 1 << (8 + cinfo)
+print(f"// CINFO = {cinfo}  (window size = {window_size})")
+
+fdict = output[1] & 0x20
+if fdict:
+    print("// FDICT = 1 (preset dictionary in use)")
+else:
+    print("// FDICT = 0 (no preset dictionary)")
+
+is_final = output[2] & 0x01
+block_type = (output[2] & 0x06) >> 1
+
+print(f"// first Huffman block: type={block_type} is_final={is_final}")
+
+print(f"// {sys.argv[1]}")
+print("unsigned char const inflate_input[] = {" + ", ".join(map(str, output)) + "};")
+print(f"unsigned short const inflate_input_size = {len(output)};")