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Fix: frozen mathutils Vector & Matrix types could be resized

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It's important that frozen types are immutable, add a generic
check that mathutils types can be resized and check the frozen flag.

Also correct the exception types when Vector's cant be resized,
using a ValueError instead of a TypeError as the type is correct.
This commit is contained in:
Campbell Barton
2025-08-14 12:26:05 +10:00
parent 3198b336e1
commit 25c69382fc
5 changed files with 54 additions and 50 deletions
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9
source/blender/python/mathutils/mathutils.hh
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@@ -118,6 +118,9 @@ struct Mathutils_Callback {
[[nodiscard]] int _BaseMathObject_WriteCallback(BaseMathObject *self);
[[nodiscard]] int _BaseMathObject_ReadIndexCallback(BaseMathObject *self, int index);
[[nodiscard]] int _BaseMathObject_WriteIndexCallback(BaseMathObject *self, int index);
/** To implement #BaseMath_Prepare_ForResize. */
[[nodiscard]] int _BaseMathObject_ResizeOkOrRaiseExc(BaseMathObject *self,
const char *error_prefix);
void _BaseMathObject_RaiseFrozenExc(const BaseMathObject *self);
void _BaseMathObject_RaiseNotFrozenExc(const BaseMathObject *self);
@@ -154,6 +157,12 @@ void _BaseMathObject_RaiseNotFrozenExc(const BaseMathObject *self);
(UNLIKELY(((_self)->flag & BASE_MATH_FLAG_IS_FROZEN) == 0) ? \
(_BaseMathObject_RaiseNotFrozenExc((BaseMathObject *)_self), -1) : \
0)
/**
* Helper to de-duplicate checks for in-place resizing.
* \return -1 and set an exception if the vector `_self` cannot be resized.
*/
#define BaseMathObject_Prepare_ForResize(_self, error_prefix) \
_BaseMathObject_ResizeOkOrRaiseExc((BaseMathObject *)_self, error_prefix)
/* utility func */
/**