add some typing annotations (#20)

* add some typing annotations

* minor additions

* import Optional

* format with black

* review comments

---------

Co-authored-by: Anton Lydike <me@antonlydike.de>

riscemu/CPU.py

@@ -51,7 +51,7 @@ class UserModeCPU(CPU):
         syscall_symbols.update(self.mmu.global_symbols)
         self.mmu.global_symbols.update(syscall_symbols)
 
-    def step(self, verbose=False):
+    def step(self, verbose: bool = False):
         """
         Execute a single instruction, then return.
         """
@@ -91,7 +91,7 @@ class UserModeCPU(CPU):
         if launch_debugger:
             launch_debug_session(self)
 
-    def run(self, verbose=False):
+    def run(self, verbose: bool = False):
         while not self.halted:
             self.step(verbose)
 
@@ -102,7 +102,7 @@ class UserModeCPU(CPU):
                 + FMT_NONE
             )
 
-    def setup_stack(self, stack_size=1024 * 4) -> bool:
+    def setup_stack(self, stack_size: int = 1024 * 4) -> bool:
         """
         Create program stack and populate stack pointer
         :param stack_size: the size of the required stack, defaults to 4Kib

riscemu/MMU.py

@@ -319,7 +319,7 @@ class MMU:
             sec.base = at_addr
             self.sections.append(sec)
             self._update_state()
-            return True
+        return True
 
     def _update_state(self):
         """

riscemu/registers.py

@@ -84,19 +84,19 @@ class Registers:
     def __init__(self, infinite_regs: bool = False):
         from .types import Int32
 
-        self.vals = defaultdict(lambda: Int32(0))
+        self.vals: defaultdict[str, Int32] = defaultdict(lambda: Int32(0))
         self.last_set = None
         self.last_read = None
         self.infinite_regs = infinite_regs
 
-    def dump(self, full=False):
+    def dump(self, full: bool = False):
         """
         Dump all registers to stdout
         :param full: If True, floating point registers are dumped too
         """
         named_regs = [self._reg_repr(reg) for reg in Registers.named_registers()]
 
-        lines = [[] for i in range(12)]
+        lines: list[list[str]] = [[] for _ in range(12)]
         if not full:
             regs = [("a", 8), ("s", 12), ("t", 7)]
         else:
@@ -142,7 +142,7 @@ class Registers:
             + " ".join(self._reg_repr("a{}".format(i)) for i in range(8))
         )
 
-    def _reg_repr(self, reg):
+    def _reg_repr(self, reg: str):
         txt = "{:4}=0x{:08X}".format(reg, self.get(reg, False))
         if reg == "fp":
             reg = "s0"
@@ -156,7 +156,7 @@ class Registers:
             return FMT_GRAY + txt + FMT_NONE
         return txt
 
-    def set(self, reg, val: "Int32", mark_set=True) -> bool:
+    def set(self, reg: str, val: "Int32", mark_set: bool = True) -> bool:
         """
         Set a register content to val
         :param reg: The register to set
@@ -189,7 +189,7 @@ class Registers:
         self.vals[reg] = val.unsigned()
         return True
 
-    def get(self, reg, mark_read=True) -> "Int32":
+    def get(self, reg: str, mark_read: bool = True) -> "Int32":
         """
         Retuns the contents of register reg
         :param reg: The register name

riscemu/types/__init__.py

@@ -1,4 +1,4 @@
-from typing import Dict
+from typing import Dict, Any
 import re
 
 # define some base type aliases so we can keep track of absolute and relative addresses
@@ -6,7 +6,7 @@ T_RelativeAddress = int
 T_AbsoluteAddress = int
 
 # parser options are just dictionaries with arbitrary values
-T_ParserOpts = Dict[str, any]
+T_ParserOpts = Dict[str, Any]
 
 NUMBER_SYMBOL_PATTERN = re.compile(r"^\d+[fb]$")
 

riscemu/types/binary_data_memory_section.py

@@ -1,3 +1,4 @@
+from typing import Optional
 from . import (
     MemorySection,
     InstructionContext,
@@ -16,15 +17,17 @@ class BinaryDataMemorySection(MemorySection):
         context: InstructionContext,
         owner: str,
         base: int = 0,
-        flags: MemoryFlags = None,
+        flags: Optional[MemoryFlags] = None,
     ):
-        self.name = name
+        super().__init__(
-        self.base = base
+            name,
-        self.context = context
+            flags if flags is not None else MemoryFlags(False, False),
-        self.size = len(data)
+            len(data),
-        self.flags = flags if flags is not None else MemoryFlags(False, False)
+            base,
+            owner,
+            context,
+        )
         self.data = data
-        self.owner = owner
 
     def read(self, offset: T_RelativeAddress, size: int) -> bytearray:
         if offset + size > self.size:

riscemu/types/cpu.py

@@ -7,6 +7,10 @@ from ..config import RunConfig
 from ..colors import FMT_RED, FMT_NONE, FMT_ERROR, FMT_CPU
 from . import T_AbsoluteAddress, Instruction, Program, ProgramLoader
 
+if typing.TYPE_CHECKING:
+    from ..MMU import MMU
+    from ..instructions import InstructionSet
+
 
 class CPU(ABC):
     # static cpu configuration
@@ -80,11 +84,11 @@ class CPU(ABC):
         )
 
     @abstractmethod
-    def step(self, verbose=False):
+    def step(self, verbose: bool = False):
         pass
 
     @abstractmethod
-    def run(self, verbose=False):
+    def run(self, verbose: bool = False):
         pass
 
     def launch(self, program: Program, verbose: bool = False):

riscemu/types/exceptions.py

@@ -14,8 +14,8 @@ if typing.TYPE_CHECKING:
 
 class RiscemuBaseException(BaseException):
     @abstractmethod
-    def message(self):
+    def message(self) -> str:
-        pass
+        raise NotImplemented
 
     def print_stacktrace(self):
         import traceback
@@ -27,7 +27,7 @@ class RiscemuBaseException(BaseException):
 
 
 class ParseException(RiscemuBaseException):
-    def __init__(self, msg, data=None):
+    def __init__(self, msg: str, data=None):
         super().__init__(msg, data)
         self.msg = msg
         self.data = data
@@ -77,7 +77,7 @@ def ASSERT_IN(a1, a2):
 
 
 class LinkerException(RiscemuBaseException):
-    def __init__(self, msg, data):
+    def __init__(self, msg: str, data):
         self.msg = msg
         self.data = data
 
@@ -93,7 +93,7 @@ class LinkerException(RiscemuBaseException):
 
 
 class MemoryAccessException(RiscemuBaseException):
-    def __init__(self, msg, addr, size, op):
+    def __init__(self, msg: str, addr, size, op):
         super(MemoryAccessException, self).__init__()
         self.msg = msg
         self.addr = addr
@@ -196,5 +196,5 @@ class NumberFormatException(RiscemuBaseException):
 
 # this exception is not printed and simply signals that an interactive debugging session is
 class LaunchDebuggerException(RiscemuBaseException):
-    def message(self):
+    def message(self) -> str:
         return ""

riscemu/types/int32.py

@@ -1,4 +1,4 @@
-from typing import Union
+from typing import Any, Union
 from ctypes import c_int32, c_uint32
 
 
@@ -52,10 +52,10 @@ class Int32:
             other = other.value
         return self.__class__(self._val.value * other)
 
-    def __truediv__(self, other):
+    def __truediv__(self, other: Any):
         return self // other
 
-    def __floordiv__(self, other):
+    def __floordiv__(self, other: Any):
         if isinstance(other, Int32):
             other = other.value
         return self.__class__(self.value // other)
@@ -90,10 +90,12 @@ class Int32:
             other = other.value
         return self.__class__(self.value >> other)
 
-    def __eq__(self, other: Union["Int32", int]):
+    def __eq__(self, other: object) -> bool:
-        if isinstance(other, Int32):
+        if isinstance(other, int):
-            other = other.value
+            return self.value == other
-        return self.value == other
+        elif isinstance(other, Int32):
+            return self.value == other.value
+        return False
 
     def __neg__(self):
         return self.__class__(-self._val.value)
@@ -110,28 +112,28 @@ class Int32:
     def __str__(self):
         return str(self.value)
 
-    def __format__(self, format_spec):
+    def __format__(self, format_spec: str):
         return self.value.__format__(format_spec)
 
     def __hash__(self):
         return hash(self.value)
 
-    def __gt__(self, other):
+    def __gt__(self, other: Any):
         if isinstance(other, Int32):
             other = other.value
         return self.value > other
 
-    def __lt__(self, other):
+    def __lt__(self, other: Any):
         if isinstance(other, Int32):
             other = other.value
         return self.value < other
 
-    def __le__(self, other):
+    def __le__(self, other: Any):
         if isinstance(other, Int32):
             other = other.value
         return self.value <= other
 
-    def __ge__(self, other):
+    def __ge__(self, other: Any):
         if isinstance(other, Int32):
             other = other.value
         return self.value >= other
@@ -139,38 +141,38 @@ class Int32:
     def __bool__(self):
         return bool(self.value)
 
-    def __cmp__(self, other):
+    def __cmp__(self, other: Any):
         if isinstance(other, Int32):
             other = other.value
         return self.value.__cmp__(other)
 
     # right handed binary operators
 
-    def __radd__(self, other):
+    def __radd__(self, other: Any):
         return self + other
 
-    def __rsub__(self, other):
+    def __rsub__(self, other: Any):
         return self.__class__(other) - self
 
-    def __rmul__(self, other):
+    def __rmul__(self, other: Any):
         return self * other
 
-    def __rtruediv__(self, other):
+    def __rtruediv__(self, other: Any):
         return self.__class__(other) // self
 
-    def __rfloordiv__(self, other):
+    def __rfloordiv__(self, other: Any):
         return self.__class__(other) // self
 
-    def __rmod__(self, other):
+    def __rmod__(self, other: Any):
         return self.__class__(other) % self
 
-    def __rand__(self, other):
+    def __rand__(self, other: Any):
         return self.__class__(other) & self
 
-    def __ror__(self, other):
+    def __ror__(self, other: Any):
         return self.__class__(other) | self
 
-    def __rxor__(self, other):
+    def __rxor__(self, other: Any):
         return self.__class__(other) ^ self
 
     @property
@@ -278,4 +280,6 @@ class UInt32(Int32):
         :param ammount: Number of positions to shift
         :return: A new Int32 object representing the shifted value (keeps the signed-ness of the source)
         """
-        return self >> ammount
+        if isinstance(ammount, Int32):
+            ammount = ammount.value
+        return UInt32(self.value >> ammount)

riscemu/types/memory_section.py

@@ -43,11 +43,11 @@ class MemorySection(ABC):
         self,
         start: T_RelativeAddress,
         end: Optional[T_RelativeAddress] = None,
-        fmt: str = None,
+        fmt: Optional[str] = None,
-        bytes_per_row: int = None,
+        bytes_per_row: Optional[int] = None,
         rows: int = 10,
-        group: int = None,
+        group: Optional[int] = None,
-        highlight: int = None,
+        highlight: Optional[int] = None,
     ):
         """
         Dump the section. If no end is given, the rows around start are printed and start is highlighted.
@@ -152,8 +152,15 @@ class MemorySection(ABC):
                     )
                 )
 
-    def dump_all(self, *args, **kwargs):
+    def dump_all(
-        self.dump(0, self.size, *args, **kwargs)
+        self,
+        fmt: Optional[str] = None,
+        bytes_per_row: Optional[int] = None,
+        rows: int = 10,
+        group: Optional[int] = None,
+        highlight: Optional[int] = None,
+    ):
+        self.dump(0, self.size, fmt, bytes_per_row, rows, group, highlight)
 
     def __repr__(self):
         return "{}[{}] at 0x{:08X} (size={}bytes, flags={}, owner={})".format(