Add API for static strings, primarily good for identifiers.
Thanks to Konrad Schöbel and Jasper Schulz for helping with the mass-editing.
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index e904b6e..af92368 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -201,6 +201,9 @@
/* The empty Unicode object is shared to improve performance. */
static PyObject *unicode_empty;
+/* List of static strings. */
+static _Py_Identifier *static_strings;
+
/* Single character Unicode strings in the Latin-1 range are being
shared as well. */
static PyObject *unicode_latin1[256];
@@ -1609,6 +1612,33 @@
return PyUnicode_FromStringAndSize(u, size);
}
+PyObject *
+_PyUnicode_FromId(_Py_Identifier *id)
+{
+ if (!id->object) {
+ id->object = PyUnicode_FromString(id->string);
+ if (!id->object)
+ return NULL;
+ PyUnicode_InternInPlace(&id->object);
+ assert(!id->next);
+ id->next = static_strings;
+ static_strings = id;
+ }
+ Py_INCREF(id->object);
+ return id->object;
+}
+
+void
+_PyUnicode_ClearStaticStrings()
+{
+ _Py_Identifier *i;
+ for (i = static_strings; i; i = i->next) {
+ Py_DECREF(i->object);
+ i->object = NULL;
+ i->next = NULL;
+ }
+}
+
static PyObject*
unicode_fromascii(const unsigned char* s, Py_ssize_t size)
{
@@ -13523,6 +13553,7 @@
unicode_latin1[i] = NULL;
}
}
+ _PyUnicode_ClearStaticStrings();
(void)PyUnicode_ClearFreeList();
}