python string conversion

- use _PyUnicode_AsStringAndSize where possible
- use %R for PyErr_Format(...) rather then running repr on the object explicitly 
- use const char

source/blender/python/generic/IDProp.c

@@ -195,19 +195,22 @@ static PyObject *BPy_IDGroup_GetName(BPy_IDProperty *self, void *UNUSED(closure)
 
 static int BPy_IDGroup_SetName(BPy_IDProperty *self, PyObject *value, void *UNUSED(closure))
 {
-	char *st;
+	const char *name;
+	Py_ssize_t name_size;
+
 	if (!PyUnicode_Check(value)) {
 		PyErr_SetString(PyExc_TypeError, "expected a string!");
 		return -1;
 	}
 
-	st = _PyUnicode_AsString(value);
-	if (BLI_strnlen(st, MAX_IDPROP_NAME) == MAX_IDPROP_NAME) {
+	name = _PyUnicode_AsStringAndSize(value, &name_size);
+
+	if (name_size > MAX_IDPROP_NAME) {
 		PyErr_SetString(PyExc_TypeError, "string length cannot exceed 31 characters!");
 		return -1;
 	}
 
-	BLI_strncpy(self->prop->name, st, sizeof(self->prop->name));
+	memcpy(self->prop->name, name, name_size);
 	return 0;
 }
 
@@ -236,7 +239,7 @@ static Py_ssize_t BPy_IDGroup_Map_Len(BPy_IDProperty *self)
 static PyObject *BPy_IDGroup_Map_GetItem(BPy_IDProperty *self, PyObject *item)
 {
 	IDProperty *idprop;
-	char *name;
+	const char *name;
 
 	if (self->prop->type  != IDP_GROUP) {
 		PyErr_SetString(PyExc_TypeError, "unsubscriptable object");
@@ -301,14 +304,22 @@ static int idp_sequence_type(PyObject *seq)
 	return type;
 }
 
-/* note: group can be a pointer array or a group */
-const char *BPy_IDProperty_Map_ValidateAndCreate(const char *name, IDProperty *group, PyObject *ob)
+/* note: group can be a pointer array or a group.
+ * assume we already checked key is a string. */
+const char *BPy_IDProperty_Map_ValidateAndCreate(PyObject *name_obj, IDProperty *group, PyObject *ob)
 {
 	IDProperty *prop = NULL;
 	IDPropertyTemplate val = {0};
 
-	if (strlen(name) >= sizeof(group->name))
-		return "the length of IDProperty names is limited to 31 characters";
+	const char *name= "";
+
+	if (name_obj) {
+		Py_ssize_t name_size;
+		name = _PyUnicode_AsStringAndSize(name_obj, &name_size);
+		if (name_size > MAX_IDPROP_NAME) {
+			return "the length of IDProperty names is limited to 31 characters";
+		}
+	}
 
 	if (PyFloat_Check(ob)) {
 		val.d = PyFloat_AsDouble(ob);
@@ -364,7 +375,7 @@ const char *BPy_IDProperty_Map_ValidateAndCreate(const char *name, IDProperty *g
 			for (i=0; i<val.array.len; i++) {
 				const char *error;
 				item = PySequence_GetItem(ob, i);
-				error= BPy_IDProperty_Map_ValidateAndCreate("", prop, item);
+				error= BPy_IDProperty_Map_ValidateAndCreate(NULL, prop, item);
 				Py_DECREF(item);
 
 				if (error)
@@ -396,7 +407,7 @@ const char *BPy_IDProperty_Map_ValidateAndCreate(const char *name, IDProperty *g
 				Py_XDECREF(pval);
 				return "invalid element in subgroup dict template!";
 			}
-			if (BPy_IDProperty_Map_ValidateAndCreate(_PyUnicode_AsString(key), prop, pval)) {
+			if (BPy_IDProperty_Map_ValidateAndCreate(key, prop, pval)) {
 				IDP_FreeProperty(prop);
 				MEM_freeN(prop);
 				Py_XDECREF(keys);
@@ -453,7 +464,7 @@ int BPy_Wrap_SetMapItem(IDProperty *prop, PyObject *key, PyObject *val)
 			return -1;
 		}
 
-		err = BPy_IDProperty_Map_ValidateAndCreate(_PyUnicode_AsString(key), prop, val);
+		err = BPy_IDProperty_Map_ValidateAndCreate(key, prop, val);
 		if (err) {
 			PyErr_SetString(PyExc_KeyError, err );
 			return -1;
@@ -587,7 +598,7 @@ static PyObject *BPy_IDGroup_Pop(BPy_IDProperty *self, PyObject *value)
 {
 	IDProperty *idprop;
 	PyObject *pyform;
-	char *name = _PyUnicode_AsString(value);
+	const char *name = _PyUnicode_AsString(value);
 
 	if (!name) {
 		PyErr_SetString(PyExc_TypeError, "pop expected at least 1 argument, got 0");
@@ -724,7 +735,7 @@ static PyObject *BPy_IDGroup_GetItems(BPy_IDProperty *self)
 
 static int BPy_IDGroup_Contains(BPy_IDProperty *self, PyObject *value)
 {
-	char *name = _PyUnicode_AsString(value);
+	const char *name = _PyUnicode_AsString(value);
 
 	if (!name) {
 		PyErr_SetString(PyExc_TypeError, "expected a string");

source/blender/python/generic/IDProp.h

@@ -61,7 +61,7 @@ int BPy_Wrap_SetMapItem(struct IDProperty *prop, PyObject *key, PyObject *val);
 
 
 PyObject *BPy_IDGroup_WrapData(struct ID *id, struct IDProperty *prop );
-const char *BPy_IDProperty_Map_ValidateAndCreate(const char *name, struct IDProperty *group, PyObject *ob);
+const char *BPy_IDProperty_Map_ValidateAndCreate(PyObject *key, struct IDProperty *group, PyObject *ob);
 
 void IDProp_Init_Types(void);
 

source/blender/python/generic/py_capi_utils.c

@@ -363,7 +363,7 @@ error_cleanup:
 /* string conversion, escape non-unicode chars, coerce must be set to NULL */
 const char *PyC_UnicodeAsByte(PyObject *py_str, PyObject **coerce)
 {
-	char *result;
+	const char *result;
 
 	result= _PyUnicode_AsString(py_str);
 

source/blender/python/intern/bpy_operator.c

@@ -380,7 +380,7 @@ static PyObject *pyop_getrna(PyObject *UNUSED(self), PyObject *value)
 {
 	wmOperatorType *ot;
 	PointerRNA ptr;
-	char *opname= _PyUnicode_AsString(value);
+	const char *opname= _PyUnicode_AsString(value);
 	BPy_StructRNA *pyrna= NULL;
 	
 	if (opname==NULL) {
@@ -413,7 +413,7 @@ static PyObject *pyop_getinstance(PyObject *UNUSED(self), PyObject *value)
 	wmOperatorType *ot;
 	wmOperator *op;
 	PointerRNA ptr;
-	char *opname= _PyUnicode_AsString(value);
+	const char *opname= _PyUnicode_AsString(value);
 	BPy_StructRNA *pyrna= NULL;
 
 	if (opname==NULL) {

source/blender/python/intern/bpy_props.c

@@ -1211,7 +1211,7 @@ static StructRNA *pointer_type_from_py(PyObject *value, const char *error_prefix
 	if (!srna) {
 		if (PyErr_Occurred()) {
 			PyObject *msg= PyC_ExceptionBuffer();
-			char *msg_char= _PyUnicode_AsString(msg);
+			const char *msg_char= _PyUnicode_AsString(msg);
 			PyErr_Format(PyExc_TypeError,
 			             "%.200s expected an RNA type derived from PropertyGroup, failed with: %s",
 			             error_prefix, msg_char);