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"""
Constants for generating the layout.
"""
__author__ = "Steve Dower <steve.dower@python.org>"
__version__ = "3.8"
import os
import pathlib
import re
import struct
import sys
def _unpack_hexversion():
try:
hexversion = int(os.getenv("PYTHON_HEXVERSION"), 16)
return struct.pack(">i", hexversion)
except (TypeError, ValueError):
pass
if os.getenv("PYTHONINCLUDE"):
try:
return _read_patchlevel_version(pathlib.Path(os.getenv("PYTHONINCLUDE")))
except OSError:
pass
return struct.pack(">i", sys.hexversion)
def _get_suffix(field4):
name = {0xA0: "a", 0xB0: "b", 0xC0: "rc"}.get(field4 & 0xF0, "")
if name:
serial = field4 & 0x0F
return f"{name}{serial}"
return ""
def _read_patchlevel_version(sources):
if not sources.match("Include"):
sources /= "Include"
values = {}
with open(sources / "patchlevel.h", "r", encoding="utf-8") as f:
for line in f:
m = re.match(r'#\s*define\s+(PY_\S+?)\s+(\S+)', line.strip(), re.I)
if m and m.group(2):
v = m.group(2)
if v.startswith('"'):
v = v[1:-1]
else:
v = values.get(v, v)
if isinstance(v, str):
try:
v = int(v, 16 if v.startswith("0x") else 10)
except ValueError:
pass
values[m.group(1)] = v
return (
values["PY_MAJOR_VERSION"],
values["PY_MINOR_VERSION"],
values["PY_MICRO_VERSION"],
values["PY_RELEASE_LEVEL"] << 4 | values["PY_RELEASE_SERIAL"],
)
def check_patchlevel_version(sources):
got = _read_patchlevel_version(sources)
if got != (VER_MAJOR, VER_MINOR, VER_MICRO, VER_FIELD4):
return f"{got[0]}.{got[1]}.{got[2]}{_get_suffix(got[3])}"
VER_MAJOR, VER_MINOR, VER_MICRO, VER_FIELD4 = _unpack_hexversion()
VER_SUFFIX = _get_suffix(VER_FIELD4)
VER_FIELD3 = VER_MICRO << 8 | VER_FIELD4
VER_DOT = "{}.{}".format(VER_MAJOR, VER_MINOR)
PYTHON_DLL_NAME = "python{}{}.dll".format(VER_MAJOR, VER_MINOR)
PYTHON_STABLE_DLL_NAME = "python{}.dll".format(VER_MAJOR)
PYTHON_ZIP_NAME = "python{}{}.zip".format(VER_MAJOR, VER_MINOR)
PYTHON_PTH_NAME = "python{}{}._pth".format(VER_MAJOR, VER_MINOR)
PYTHON_CHM_NAME = "python{}{}{}{}.chm".format(
VER_MAJOR, VER_MINOR, VER_MICRO, VER_SUFFIX
)
FREETHREADED_PYTHON_DLL_NAME = "python{}{}t.dll".format(VER_MAJOR, VER_MINOR)
FREETHREADED_PYTHON_STABLE_DLL_NAME = "python{}t.dll".format(VER_MAJOR)
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