ipc_breakdown_header.py

#!/usr/bin/env python3

import sys

def ipc_getcmdid(hdr: int) -> int:
	return ((hdr & ~0xFFFF) >> 16)

def ipc_get_normal_args_count(hdr: int) -> int:
    return ((hdr >> 6) & 0x3F)

def ipc_get_translate_args_count(hdr: int) -> int:
    return hdr & 0xF

if len(sys.argv) != 2:
	exit('bad args')

try:
	hdr = int(sys.argv[1])
except Exception as e:
	try:
		hdr = int(sys.argv[1], 16)
	except Exception as f:
		exit('bad args')

if hdr > (1 << 31) or hdr < -(1 << 31):
	exit('int out of range')

cmdid = ipc_getcmdid(hdr)
normal = ipc_get_normal_args_count(hdr)
translate = ipc_get_translate_args_count(hdr)

print(f"0x{hdr:08X} == IPC_MakeHeader(({cmdid} or 0x{cmdid:x}), {normal}, {translate})")