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106 lines
2.8 KiB
Python
106 lines
2.8 KiB
Python
"""Compiler helpers for the debugger."""
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import os
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import sys
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import tempfile
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from IPython.core.compilerop import CachingCompiler
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def murmur2_x86(data, seed):
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"""Get the murmur2 hash."""
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m = 0x5BD1E995
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data = [chr(d) for d in str.encode(data, "utf8")]
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length = len(data)
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h = seed ^ length
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rounded_end = length & 0xFFFFFFFC
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for i in range(0, rounded_end, 4):
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k = (
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(ord(data[i]) & 0xFF)
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| ((ord(data[i + 1]) & 0xFF) << 8)
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| ((ord(data[i + 2]) & 0xFF) << 16)
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| (ord(data[i + 3]) << 24)
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)
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k = (k * m) & 0xFFFFFFFF
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k ^= k >> 24
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k = (k * m) & 0xFFFFFFFF
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h = (h * m) & 0xFFFFFFFF
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h ^= k
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val = length & 0x03
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k = 0
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if val == 3:
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k = (ord(data[rounded_end + 2]) & 0xFF) << 16
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if val in [2, 3]:
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k |= (ord(data[rounded_end + 1]) & 0xFF) << 8
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if val in [1, 2, 3]:
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k |= ord(data[rounded_end]) & 0xFF
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h ^= k
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h = (h * m) & 0xFFFFFFFF
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h ^= h >> 13
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h = (h * m) & 0xFFFFFFFF
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h ^= h >> 15
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return h
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convert_to_long_pathname = lambda filename: filename # noqa: E731
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if sys.platform == "win32":
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try:
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import ctypes
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from ctypes.wintypes import DWORD, LPCWSTR, LPWSTR, MAX_PATH
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_GetLongPathName = ctypes.windll.kernel32.GetLongPathNameW
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_GetLongPathName.argtypes = [LPCWSTR, LPWSTR, DWORD]
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_GetLongPathName.restype = DWORD
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def _convert_to_long_pathname(filename):
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buf = ctypes.create_unicode_buffer(MAX_PATH)
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rv = _GetLongPathName(filename, buf, MAX_PATH)
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if rv != 0 and rv <= MAX_PATH:
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filename = buf.value
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return filename
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# test that it works so if there are any issues we fail just once here
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_convert_to_long_pathname(__file__)
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except Exception:
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pass
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else:
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convert_to_long_pathname = _convert_to_long_pathname
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def get_tmp_directory():
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"""Get a temp directory."""
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tmp_dir = convert_to_long_pathname(tempfile.gettempdir())
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pid = os.getpid()
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return tmp_dir + os.sep + "ipykernel_" + str(pid)
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def get_tmp_hash_seed():
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"""Get a temp hash seed."""
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return 0xC70F6907
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def get_file_name(code):
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"""Get a file name."""
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cell_name = os.environ.get("IPYKERNEL_CELL_NAME")
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if cell_name is None:
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name = murmur2_x86(code, get_tmp_hash_seed())
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cell_name = get_tmp_directory() + os.sep + str(name) + ".py"
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return cell_name
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class XCachingCompiler(CachingCompiler):
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"""A custom caching compiler."""
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def __init__(self, *args, **kwargs):
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"""Initialize the compiler."""
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super().__init__(*args, **kwargs)
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self.log = None
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def get_code_name(self, raw_code, code, number):
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"""Get the code name."""
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return get_file_name(raw_code)
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