PyAPI: Integer conversion functions

Python's C-API doesn't provide functions to get
int's at specific integer sizes.

Leaving the caller to check for overflow,
which ended up being ignored in practice.

Add API functions that convert int/uint 8/16/32/64, also bool.
Raising overflow exception for unsupported ranges.

1 files changed, 22 insertions, 0 deletions

diff --git a/source/blender/python/generic/py_capi_utils.h b/source/blender/python/generic/py_capi_utils.h
index 3f89e1d82a0..322e67f486d 100644
--- a/source/blender/python/generic/py_capi_utils.h
+++ b/source/blender/python/generic/py_capi_utils.h
@@ -85,4 +85,26 @@ bool PyC_RunString_AsString(const char *expr, const char *filename, char **r_val
 
 int PyC_ParseBool(PyObject *o, void *p);
 
+
+/* Integer parsing (with overflow checks), -1 on error. */
+int     PyC_Long_AsBool(PyObject *value);
+int8_t  PyC_Long_AsI8(PyObject *value);
+int16_t PyC_Long_AsI16(PyObject *value);
+#if 0 /* inline */
+int32_t PyC_Long_AsI32(PyObject *value);
+int64_t PyC_Long_AsI64(PyObject *value);
+#endif
+
+uint8_t  PyC_Long_AsU8(PyObject *value);
+uint16_t PyC_Long_AsU16(PyObject *value);
+uint32_t PyC_Long_AsU32(PyObject *value);
+#if 0 /* inline */
+uint64_t PyC_Long_AsU64(PyObject *value);
+#endif
+
+/* inline so type signatures match as expected */
+BLI_INLINE int32_t PyC_Long_AsI32(PyObject *value) { return (int32_t)_PyLong_AsInt(value); }
+BLI_INLINE int64_t PyC_Long_AsI64(PyObject *value) { return (int64_t)PyLong_AsLongLong(value); }
+BLI_INLINE uint64_t PyC_Long_AsU64(PyObject *value) { return (uint64_t)PyLong_AsUnsignedLongLong(value); }
+
 #endif  /* __PY_CAPI_UTILS_H__ */