86 lines
2.9 KiB
Python
86 lines
2.9 KiB
Python
import t, c
|
||
import mbuddy
|
||
import string
|
||
from stdint import *
|
||
|
||
|
||
class list[T]:
|
||
"""堆上动态列表容器，基于 mbuddy 分配器。
|
||
|
||
用法:
|
||
mb: mbuddy.MBuddy = mbuddy.MBuddy(arena, arena_size)
|
||
nums: list[int] = list[int](mb)
|
||
nums.append(42)
|
||
x: int = nums.get(0)
|
||
"""
|
||
__data__: t.CVoid | t.CPtr
|
||
__count__: t.CSizeT
|
||
__capacity__: t.CSizeT
|
||
__mbuddy__: mbuddy.MBuddy | t.CPtr
|
||
__iter_index__: t.CSizeT
|
||
|
||
def __new__(self, mb: mbuddy.MBuddy | t.CPtr):
|
||
# 堆分配 list[T] 对象 (5 字段 × 8 字节 = 40 字节)
|
||
# 避免栈上分配导致返回后 use-after-free
|
||
buf: t.CVoid | t.CPtr = mb.alloc(40)
|
||
return buf
|
||
|
||
def __init__(self, mb: mbuddy.MBuddy | t.CPtr):
|
||
self.__mbuddy__ = mb
|
||
self.__count__ = 0
|
||
self.__capacity__ = 8
|
||
self.__data__ = mb.alloc(self.__capacity__ * T.__sizeof__())
|
||
self.__iter_index__ = 0
|
||
|
||
def __len__(self) -> t.CSizeT:
|
||
return self.__count__
|
||
|
||
def append(self, item: T):
|
||
if self.__count__ >= self.__capacity__:
|
||
new_cap: t.CSizeT = self.__capacity__ * 2
|
||
new_data: t.CVoid | t.CPtr = self.__mbuddy__.alloc(new_cap * T.__sizeof__())
|
||
if new_data == None:
|
||
return
|
||
string.memcpy(new_data, self.__data__, self.__count__ * T.__sizeof__())
|
||
self.__data__ = new_data
|
||
self.__capacity__ = new_cap
|
||
elem_ptr: T | t.CPtr = t.CVoid(t.CUInt64T(self.__data__) + self.__count__ * T.__sizeof__(), t.CPtr)
|
||
elem_ptr[0] = item
|
||
self.__count__ += 1
|
||
|
||
def get(self, index: t.CSizeT) -> T:
|
||
elem_ptr: T | t.CPtr = t.CVoid(t.CUInt64T(self.__data__) + index * T.__sizeof__(), t.CPtr)
|
||
return elem_ptr[0]
|
||
|
||
def __getitem__(self, index: t.CSizeT) -> T:
|
||
elem_ptr: T | t.CPtr = t.CVoid(t.CUInt64T(self.__data__) + index * T.__sizeof__(), t.CPtr)
|
||
return elem_ptr[0]
|
||
|
||
def set(self, index: t.CSizeT, value: T):
|
||
elem_ptr: T | t.CPtr = t.CVoid(t.CUInt64T(self.__data__) + index * T.__sizeof__(), t.CPtr)
|
||
elem_ptr[0] = value
|
||
|
||
def __setitem__(self, index: t.CSizeT, value: T):
|
||
elem_ptr: T | t.CPtr = t.CVoid(t.CUInt64T(self.__data__) + index * T.__sizeof__(), t.CPtr)
|
||
elem_ptr[0] = value
|
||
|
||
def pop(self) -> T:
|
||
self.__count__ -= 1
|
||
elem_ptr: T | t.CPtr = t.CVoid(t.CUInt64T(self.__data__) + self.__count__ * T.__sizeof__(), t.CPtr)
|
||
return elem_ptr[0]
|
||
|
||
def clear(self):
|
||
self.__count__ = 0
|
||
|
||
def __iter__(self):
|
||
self.__iter_index__ = 0
|
||
return self
|
||
|
||
def __next__(self) -> T:
|
||
if self.__iter_index__ >= self.__count__:
|
||
raise StopIteration
|
||
idx: t.CSizeT = self.__iter_index__
|
||
self.__iter_index__ = idx + 1
|
||
elem_ptr: T | t.CPtr = t.CVoid(t.CUInt64T(self.__data__) + idx * T.__sizeof__(), t.CPtr)
|
||
return elem_ptr[0]
|