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HexTool.py

@@ -0,0 +1,28 @@
+import io
+import struct
+
+
+def seek_align_up(filestream: io.BufferedReader, align: int) -> int | None:
+    """pad to align"""
+    padSize = filestream.tell() % align
+    padding, = struct.unpack(f"{padSize}s", filestream.read(padSize))
+    assert all([x == 0 for x in padding]), "padding value should be zero"
+    return padding
+
+
+def printHexView(bytestream: bytearray | bytes, width = 32):
+    """print hex bytes similar in hex editor, for debug usage"""
+    view = ""
+    digit = len(str(len(bytestream)))
+    for i, b in enumerate(bytestream):
+        sep = ' '
+        pref = ''
+        if i % width == 0:
+            pref = ("{0:0"+str(digit)+"d}").format(i) + ": "
+        elif i % width == width - 1:
+            sep = '\n'
+        elif i % 4 == 4 - 1:
+            sep = '|'
+        view = view + pref + f"{b:02X}" + sep
+    print(view)
+    return view