From 0795a5f8bb9d1bb81d34b2e1dfb1233e0c572021 Mon Sep 17 00:00:00 2001
From: nikto_b <nikto_b@newt.team>
Date: Tue, 26 Aug 2025 17:34:14 +0300
Subject: [PATCH] Add basic inflator cython support

---
 pyproject.toml                          |   2 +
 src/megasniff/__main__.py               |  31 ++-
 src/megasniff/inflator.py               | 250 +++++++++++++++++++++++-
 src/megasniff/templates/inflator.jinja2 |  35 +++-
 uv.lock                                 |  44 ++++-
 5 files changed, 346 insertions(+), 16 deletions(-)

diff --git a/pyproject.toml b/pyproject.toml
index 6033938..3d0fc6d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,8 +8,10 @@ authors = [
 license = "LGPL-3.0-or-later"
 requires-python = ">=3.13"
 dependencies = [
+    "cython>=3.1.3",
     "hatchling>=1.27.0",
     "jinja2>=3.1.6",
+    "setuptools>=80.9.0",
 ]
 
 [build-system]
diff --git a/src/megasniff/__main__.py b/src/megasniff/__main__.py
index 41203a8..019a049 100644
--- a/src/megasniff/__main__.py
+++ b/src/megasniff/__main__.py
@@ -5,18 +5,27 @@ from typing import Optional
 from typing import TypedDict
 
 import megasniff.exceptions
+from megasniff.python_to_cython import python_obj_to_cython
 from . import SchemaInflatorGenerator
 
 
-@dataclass(frozen=True)
+@dataclass
 class ASchema:
-    a: int
+    a: int | None
     b: float | str
     bs: Optional[BSchema]
+    d: int
     c: float = 1.1
 
+    def __init__(self, a: int | None, b: float | str, bs: Optional[BSchema], c: float = 1.1):
+        self.a = a
+        self.b = b
+        self.bs = bs
+        self.c = c
+        self.d = a or 0
 
-class BSchema(TypedDict):
+@dataclass
+class BSchema:
     a: int
     b: str
     c: float
@@ -27,10 +36,23 @@ class BSchema(TypedDict):
 class CSchema:
     l: set[int | ASchema]
 
+@dataclass
+class SomeData:
+    a: int
+    b: float
+    c: str
 
 def main():
+    # ccode = python_obj_to_cython(ASchema)
+    # print(ccode)
+    # exit(0)
+
+    # infl = SchemaInflatorGenerator(strict_mode=True)
+    # fn = infl.schema_to_inflator(SomeData)
+    # print(fn({'a': 1, 'b': 1.1, 'c': 'asdf'}))
     infl = SchemaInflatorGenerator(strict_mode=True)
     fn = infl.schema_to_inflator(ASchema)
+    # exit(0)
     # print(t)
     # print(n)
     # exec(t, n)
@@ -40,7 +62,8 @@ def main():
     # d = {'a': 1, 'b': 1, 'c': 0, 'bs': {'a': 1, 'b': 2, 'c': 3, 'd': {'a': 1, 'b': 2.1, 'bs': None}}}
     # d = {'a': 2, 'b': 2, 'bs': {'a': 2, 'b': 'a', 'c': 0, 'd': {'a': 2, 'b': 2}}}
     # d = {'l': ['1', {'a': 42, 'b': 1}]}
-    d = {'a': 2, 'b': '2', 'bs': None}
+    # d = {'a': None, 'b': '2', 'bs': None}
+    d = {'a': None, 'b': '2', 'bs': {'a': 1, 'b': 'a', 'c': 1.1, 'd': {'a': 1, 'b': '', 'bs': None}}}
     try:
         o = fn(d)
         print(o)
diff --git a/src/megasniff/inflator.py b/src/megasniff/inflator.py
index 49fb6f6..03f161a 100644
--- a/src/megasniff/inflator.py
+++ b/src/megasniff/inflator.py
@@ -2,11 +2,18 @@
 # SPDX-License-Identifier: LGPL-3.0-or-later
 from __future__ import annotations
 import collections.abc
+import hashlib
 import importlib.resources
+import importlib.util
+import os
+import subprocess
+import sys
+import tempfile
 from collections import defaultdict
 from collections.abc import Callable
 from dataclasses import dataclass
-from types import NoneType, UnionType
+from pathlib import Path
+from types import NoneType, UnionType, ModuleType
 from typing import Optional, get_origin, get_args, Union, Annotated, Literal, Sequence, List, Set, TypeAliasType, \
     OrderedDict
 
@@ -14,6 +21,7 @@ import jinja2
 
 from . import utils
 from .utils import *
+import random, string
 
 
 @dataclass
@@ -23,6 +31,7 @@ class TypeRenderData:
     is_list: bool
     is_union: bool
     is_strict: bool
+    ctype: str
 
 
 @dataclass
@@ -48,6 +57,7 @@ class FieldRenderData:
     is_optional: bool
     allow_none: bool
     default_option: Optional[str]
+    ctype: str
 
     def __init__(self,
                  argname: str,
@@ -55,7 +65,8 @@ class FieldRenderData:
                  typename: str,
                  is_optional: bool,
                  allow_none: bool,
-                 default_option: Optional[str]):
+                 default_option: Optional[str],
+                 ctype: str):
         self.argname = argname
         self.constrs = constrs
         self.typename = typename
@@ -63,6 +74,221 @@ class FieldRenderData:
         self.allow_none = allow_none
         self.default_option = default_option
         self.argname_escaped = _escape_python_name(argname)
+        self.ctype = ctype
+
+
+def randomword(length):
+    letters = string.ascii_lowercase
+    return ''.join(random.choice(letters) for i in range(length))
+
+
+def exec_cython(txt: str, namespace: dict, name: str):
+    """
+    Drop-in замена exec(txt, namespace), но через cython.
+    Возвращает callable объект из namespace['inflator'].
+    """
+    # генерируем уникальное имя для модуля
+    h = hashlib.sha256(txt.encode() + str(sorted(namespace.keys())).encode()).hexdigest()[:16]
+    modname = f"_cyexec_{h}"
+
+    build_dir = tempfile.mkdtemp(prefix="cyexec_")
+    pyx_file = os.path.join(build_dir, f"{modname}.pyx")
+
+    # соберём код для .pyx
+    # сначала экспортируем namespace
+    export_lines = []
+    for k, v in namespace.items():
+        if k not in {'int', 'float', 'str'}:
+            export_lines.append(f"{k} = __ns__['{k}']")
+
+    pyx_code = f"""
+# cython: language_level=3
+# cython: boundscheck=False, wraparound=False, nonecheck=False
+# AUTO-GENERATED
+
+# Вставляем runtime namespace
+import builtins
+__ns__ = builtins.__dict__['_cyexec_ns']
+
+cdef class NullableInt:
+    cdef long value
+    cdef bint has
+
+    cpdef set(self, long value):
+        self.value = value
+        self.has = 1
+
+    cpdef unset(self):
+        self.has = 0
+
+cdef class NullableDouble:
+    cdef double value
+    cdef bint has
+
+    cpdef set(self, double value):
+        self.value = value
+        self.has = 1
+
+    cpdef unset(self):
+        self.has = 0
+{os.linesep.join(export_lines)}
+
+
+
+
+# пользовательский код
+{txt}
+"""
+
+    # пишем файл
+    with open(pyx_file, "w") as f:
+        f.write(pyx_code)
+
+    # нужно сохранить namespace в builtins, чтобы cython его видел
+    import builtins
+    builtins._cyexec_ns = namespace
+
+    # компилируем через cythonize
+    setup_code = f"""
+from setuptools import setup
+from Cython.Build import cythonize
+setup(
+    name="{modname}",
+    ext_modules=cythonize("{pyx_file}", compiler_directives={{"language_level": "3"}}),
+    script_args=["build_ext", "--inplace"],
+)
+"""
+    setup_file = os.path.join(build_dir, "setup.py")
+    with open(setup_file, "w") as f:
+        f.write(setup_code)
+
+    subprocess.check_call([sys.executable, setup_file, "build_ext", "--inplace"], cwd=build_dir)
+
+    # находим .so файл
+    for fn in os.listdir(build_dir):
+        if fn.startswith(modname) and fn.endswith((".so", ".pyd")):
+            so_path = os.path.join(build_dir, fn)
+            break
+    else:
+        raise RuntimeError("Cython build failed, no .so produced")
+
+    # импортим как модуль
+    spec = importlib.util.spec_from_file_location(modname, so_path)
+    mod = importlib.util.module_from_spec(spec)
+    sys.modules[modname] = mod
+    spec.loader.exec_module(mod)
+
+    # чистим временный namespace в builtins
+    del builtins._cyexec_ns
+
+    return getattr(mod, name)
+
+
+@dataclass
+class BasicTypeVariationTest:
+    index: int
+    basic_type: str
+
+
+@dataclass
+class ObjectTypeVariationTest:
+    index: int
+    fields_contains: list[tuple[str, TypeVariationTest | None]]
+
+
+@dataclass
+class TypeVariationTest:
+    types: list[TypeConstructionSchema]
+    basic_tests: list[BasicTypeVariationTest]
+    object_tests: list[ObjectTypeVariationTest]
+
+
+@dataclass
+class TypeConstructionSchema:
+    tp: type
+    allow_none: bool
+    kwargs: Optional[dict[str, tuple[str, list[TypeConstructionSchema] | type]]]
+
+    @property
+    def typed_key_pairs(self) -> set[str]:
+        ret = set()
+        for k, (_, v) in self.kwargs.items():
+            if isinstance(v, type):
+                ret.add(f'{k}:{v}')
+            else:
+                if not isinstance(v, list):
+                    v = [v]
+                for _v in v:
+                    ret.add(f'{k}:{_v.tp}')
+
+        return ret
+
+
+class Z1:
+    a: int
+    b: int
+
+
+class Z2:
+    c: int
+    d: int
+
+
+class Z3:
+    e: int
+    f: int
+
+
+class A:
+    a: int
+    b: Z1 | Z3
+
+
+class B:
+    a: int
+    b: Z2
+
+
+class C:
+    z1: Z1
+    z2: Z2
+
+
+_ = A | B | C
+
+
+def find_types_variations(types: list[TypeConstructionSchema]) -> TypeVariationTest:
+    basic_tests = []
+    object_tests = []
+    for i, tp in enumerate(types):
+        if tp.kwargs is None:
+            basic_tests.append(BasicTypeVariationTest(i, _type_to_ctype(tp.tp, tp.allow_none)))
+    for i, tp in enumerate(types):
+        if tp.kwargs is not None:
+            tp_keys = []
+            uniq_keys = set()
+            if i < len(types):
+                keys = set()
+                for t in types[i + 1:]:
+                    keys |= set((t.kwargs or {}).keys())
+                obj_keys = set(tp.kwargs.keys())
+                uniq_keys = (obj_keys ^ keys) & obj_keys
+
+            if len(uniq_keys) > 0:
+                k = list(uniq_keys)[0]
+                object_tests.append(ObjectTypeVariationTest(i, [(k, None)]))
+            else:
+                pass
+
+    return TypeVariationTest(types, basic_tests, object_tests)
+
+
+def _type_to_ctype(t: type, allow_none: bool) -> str:
+    if t is int:
+        return 'NullableInt' if allow_none else 'long'
+    if t is float:
+        return 'NullableFloat' if allow_none else 'double'
+    return 'object'
 
 
 class SchemaInflatorGenerator:
@@ -100,18 +326,23 @@ class SchemaInflatorGenerator:
                            strict_mode_override: Optional[bool] = None,
                            from_type_override: Optional[type | TypeAliasType] = None
                            ) -> Callable[[dict[str, Any]], Any]:
+        name = 'inflate'
+        if isinstance(schema, type):
+            name = f'inflate_{schema.__name__}'
         if from_type_override is not None and '__getitem__' not in dir(from_type_override):
             raise RuntimeError('from_type_override must provide __getitem__')
         txt, namespace = self._schema_to_inflator(schema,
-                                                  _funcname='inflate',
+                                                  _funcname=name,
                                                   strict_mode_override=strict_mode_override,
                                                   from_type_override=from_type_override,
                                                   )
         imports = ('from typing import Any\n'
                    'from megasniff.exceptions import MissingFieldException, FieldValidationException\n')
         txt = imports + '\n' + txt
-        exec(txt, namespace)
-        fn = namespace['inflate']
+        fn = exec_cython(txt, namespace, name)
+        # fn = exec_numba(txt, namespace, func_name=name)
+        # exec(txt, namespace)
+        # fn = namespace[name]
         if self._store_sources:
             setattr(fn, '__megasniff_sources__', txt)
         return fn
@@ -132,10 +363,11 @@ class SchemaInflatorGenerator:
 
         if is_union:
             typerefs = list(map(lambda x: self._unwrap_typeref(x, strict_mode), argtypes))
-            return TypeRenderData(typerefs, allow_none, False, True, False)
+            return TypeRenderData(typerefs, allow_none, False, True, False, 'object')
         elif type_origin in [list, set]:
             rd = self._unwrap_typeref(argtypes[0], strict_mode)
-            return IterableTypeRenderData(rd, allow_none, True, False, False, type_origin.__name__)
+            return IterableTypeRenderData(rd, allow_none, True, False, False, type_origin.__name__,
+                                          'NullableList' if allow_none else 'list')
         else:
             t = argtypes[0]
 
@@ -148,7 +380,8 @@ class SchemaInflatorGenerator:
                                   allow_none,
                                   is_list,
                                   False,
-                                  strict_mode if is_builtin else False)
+                                  strict_mode if is_builtin else False,
+                                  _type_to_ctype(t, allow_none))
 
     def _schema_to_inflator(self,
                             schema: type | Sequence[TupleSchemaItem | tuple[str, type]] | OrderedDict[str, type],
@@ -243,6 +476,7 @@ class SchemaInflatorGenerator:
                     has_default,
                     allow_none,
                     default_option if not isinstance(default_option, str) else f"'{default_option}'",
+                    typeref.ctype
                 )
             )
 
diff --git a/src/megasniff/templates/inflator.jinja2 b/src/megasniff/templates/inflator.jinja2
index 43d6e9f..be2f77b 100644
--- a/src/megasniff/templates/inflator.jinja2
+++ b/src/megasniff/templates/inflator.jinja2
@@ -2,16 +2,45 @@
 {% import "unwrap_type_data.jinja2" as unwrap_type_data %}
 
 
-def {{funcname}}(from_data: {% if from_type is none %}dict[str, Any]{% else %}{{from_type}}{% endif %}) {% if tgt_type is not none %} -> {{tgt_type}} {% endif %}:
+{% macro render_setter(argname, argval) -%}
+{%- set out -%}
+{% if argname.startswith('Nullable') %}
+{% if argval == 'None' %}
+{{argname}}.unset()
+{% else %}
+{{argname}}.set({{argval}})
+{%endif%}
+{% else %}
+{{argname}} = {{argval}}
+{% endif %}
+{%- endset %}
+{{out}}
+{%- endmacro %}
+
+{% macro check_null(argname) -%}
+{%- set out -%}
+{% if argname.startswith('Nullable') %}
+if {{argname}}.has:
+{% else %}
+if {{argname}} is None:
+{% endif %}
+{%- endset %}
+{{out}}
+{%- endmacro %}
+
+
+cpdef object {{funcname}}(dict from_data):
     """
     {{tgt_type}}
     """
     from_data_keys = from_data.keys()
+    cdef object conv_data
 
     {% for conv in conversions %}
+    cdef {{conv.argctype}} {{conv.argname_escaped}}
     if '{{conv.argname}}' not in from_data_keys:
     {% if conv.is_optional %}
-        {{conv.argname_escaped}} = {{conv.default_option}}
+{{ render_setter(conv.argname_escaped, conv.default_option) | indent(4*2) }}
     {% else %}
         raise MissingFieldException('{{conv.argname}}', "{{conv.typename | replace('"', "'")}}")
     {% endif %}
@@ -21,7 +50,7 @@ def {{funcname}}(from_data: {% if from_type is none %}dict[str, Any]{% else %}{{
         {% if not conv.allow_none %}
             raise FieldValidationException('{{conv.argname}}', "{{conv.typename | replace('"', "'")}}", conv_data)
         {% else %}
-            {{conv.argname_escaped}} = None
+            {{ render_setter(conv.argname_escaped, 'None') | indent(4*3) }}
         {% endif %}
         else:
 
diff --git a/uv.lock b/uv.lock
index 6fc8a33..4c43904 100644
--- a/uv.lock
+++ b/uv.lock
@@ -42,6 +42,35 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/3c/38/bbe2e63902847cf79036ecc75550d0698af31c91c7575352eb25190d0fb3/coverage-7.9.2-py3-none-any.whl", hash = "sha256:e425cd5b00f6fc0ed7cdbd766c70be8baab4b7839e4d4fe5fac48581dd968ea4", size = 204005, upload-time = "2025-07-03T10:54:13.491Z" },
 ]
 
+[[package]]
+name = "cython"
+version = "3.1.3"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/18/ab/915337fb39ab4f4539a313df38fc69938df3bf14141b90d61dfd5c2919de/cython-3.1.3.tar.gz", hash = "sha256:10ee785e42328924b78f75a74f66a813cb956b4a9bc91c44816d089d5934c089", size = 3186689, upload-time = "2025-08-13T06:19:13.619Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/7f/93/0e5dfcc6215a6c2cae509d7e40f8fb197237ba5998c936e9c19692f8eedf/cython-3.1.3-cp313-cp313-macosx_10_13_x86_64.whl", hash = "sha256:9458d540ef0853ea4fc65b8a946587bd483ef7244b470b3d93424eb7b04edeb1", size = 2998232, upload-time = "2025-08-13T06:20:35.817Z" },
+    { url = "https://files.pythonhosted.org/packages/6b/6c/01b22de45e3a9b86fbe4a18cd470146514209448cb4d3d3ba9c72390d45b/cython-3.1.3-cp313-cp313-macosx_11_0_arm64.whl", hash = "sha256:32d1b22c3b231326e9f16480a7f508c6841bbf7d0615c2d6f489ebc72dd05205", size = 2830052, upload-time = "2025-08-13T06:20:37.71Z" },
+    { url = "https://files.pythonhosted.org/packages/52/08/a7d4b91b144b4bd015e932303861061cd43221f737ecdc6e380a438f245f/cython-3.1.3-cp313-cp313-manylinux1_i686.manylinux_2_28_i686.manylinux_2_5_i686.whl", hash = "sha256:d4c7e0b8584b02a349952de7d7d47f89c97cbf3fee74962e89e3caa78139ec84", size = 3359478, upload-time = "2025-08-13T06:20:39.811Z" },
+    { url = "https://files.pythonhosted.org/packages/f5/7d/b44ee735439ee73a88c6532536cfbc5b2f146c5f315effa124e85aadb447/cython-3.1.3-cp313-cp313-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl", hash = "sha256:c9178f0c06f4bc92372dc44e3867e9285bebd556953e47857c26b389aabe2828", size = 3155157, upload-time = "2025-08-13T06:20:42.305Z" },
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 name = "hatchling"
 version = "1.27.0"
@@ -108,11 +137,13 @@ wheels = [
 
 [[package]]
 name = "megasniff"
-version = "0.1.2"
+version = "0.2.3.post2"
 source = { editable = "." }
 dependencies = [
+    { name = "cython" },
     { name = "hatchling" },
     { name = "jinja2" },
+    { name = "setuptools" },
 ]
 
 [package.dev-dependencies]
@@ -123,8 +154,10 @@ dev = [
 
 [package.metadata]
 requires-dist = [
+    { name = "cython", specifier = ">=3.1.3" },
     { name = "hatchling", specifier = ">=1.27.0" },
     { name = "jinja2", specifier = ">=3.1.6" },
+    { name = "setuptools", specifier = ">=80.9.0" },
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@@ -199,6 +232,15 @@ wheels = [
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 ]
 
+[[package]]
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+version = "80.9.0"
+source = { registry = "https://pypi.org/simple" }
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+
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 name = "trove-classifiers"
 version = "2025.5.9.12"