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gh-132987: Support __index__() in the lzma module #133099

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Merged
merged 3 commits into from
Apr 29, 2025
+30 −24
Merged

gh-132987: Support __index__() in the lzma module #133099

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e58813b
gh-132987: Support __index__() in the lzma module
serhiy-storchaka Apr 28, 2025
5f152e5
Fix tests.
serhiy-storchaka Apr 28, 2025
7ce4ae2
Update Modules/_lzmamodule.c
serhiy-storchaka Apr 29, 2025
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6 changes: 4 additions & 2 deletions Lib/test/test_lzma.py
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Original file line number Diff line number Diff line change
Expand Up @@ -657,10 +657,12 @@ def test_init_bad_preset(self):
LZMAFile(BytesIO(), "w", preset=10)
with self.assertRaises(LZMAError):
LZMAFile(BytesIO(), "w", preset=23)
with self.assertRaises(OverflowError):
with self.assertRaises(ValueError):
LZMAFile(BytesIO(), "w", preset=-1)
with self.assertRaises(OverflowError):
with self.assertRaises(ValueError):
LZMAFile(BytesIO(), "w", preset=-7)
with self.assertRaises(OverflowError):
LZMAFile(BytesIO(), "w", preset=2**1000)
with self.assertRaises(TypeError):
LZMAFile(BytesIO(), "w", preset="foo")
# Cannot specify a preset with mode="r".
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48 changes: 26 additions & 22 deletions Modules/_lzmamodule.c
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Expand Up @@ -203,25 +203,28 @@ PyLzma_Free(void *opaque, void *ptr)
to be strictly correct, we need to define two separate converters.
*/

#define INT_TYPE_CONVERTER_FUNC(TYPE, FUNCNAME) \
static int \
FUNCNAME(PyObject *obj, void *ptr) \
{ \
unsigned long long val; \
\
val = PyLong_AsUnsignedLongLong(obj); \
if (PyErr_Occurred()) \
return 0; \
if ((unsigned long long)(TYPE)val != val) { \
PyErr_SetString(PyExc_OverflowError, \
"Value too large for " #TYPE " type"); \
return 0; \
} \
*(TYPE *)ptr = (TYPE)val; \
return 1; \
}
#define INT_TYPE_CONVERTER_FUNC(TYPE, FUNCNAME) \
static int \
FUNCNAME(PyObject *obj, void *ptr) \
{ \
Py_ssize_t bytes = PyLong_AsNativeBytes(obj, ptr, sizeof(TYPE), \
Py_ASNATIVEBYTES_NATIVE_ENDIAN | \
Py_ASNATIVEBYTES_ALLOW_INDEX | \
Py_ASNATIVEBYTES_REJECT_NEGATIVE | \
Py_ASNATIVEBYTES_UNSIGNED_BUFFER); \
if (bytes < 0) { \
return 0; \
} \
if ((size_t)bytes > sizeof(TYPE)) { \
PyErr_SetString(PyExc_OverflowError, \
"Python int too large for C "#TYPE); \
return 0; \
} \
return 1; \
}

INT_TYPE_CONVERTER_FUNC(uint32_t, uint32_converter)
INT_TYPE_CONVERTER_FUNC(uint64_t, uint64_converter)
INT_TYPE_CONVERTER_FUNC(lzma_vli, lzma_vli_converter)
INT_TYPE_CONVERTER_FUNC(lzma_mode, lzma_mode_converter)
INT_TYPE_CONVERTER_FUNC(lzma_match_finder, lzma_mf_converter)
Expand Down Expand Up @@ -355,11 +358,13 @@ lzma_filter_converter(_lzma_state *state, PyObject *spec, void *ptr)
"Filter specifier must have an \"id\" entry");
return 0;
}
f->id = PyLong_AsUnsignedLongLong(id_obj);
Py_DECREF(id_obj);
if (PyErr_Occurred()) {
lzma_vli id;
if (!lzma_vli_converter(id_obj, &id)) {
Py_DECREF(id_obj);
return 0;
}
Py_DECREF(id_obj);
f->id = id;

switch (f->id) {
case LZMA_FILTER_LZMA1:
Expand Down Expand Up @@ -1221,8 +1226,7 @@ _lzma_LZMADecompressor_impl(PyTypeObject *type, int format,
"Cannot specify memory limit with FORMAT_RAW");
return NULL;
}
memlimit_ = PyLong_AsUnsignedLongLong(memlimit);
if (PyErr_Occurred()) {
if (!uint64_converter(memlimit, &memlimit_)) {
return NULL;
}
}
Expand Down
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