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Fix fixup() for unchanged unicode subtype 

If maxchar_new == 0 and self is a unicode subtype, return u instead of duplicating u.
This commit is contained in:
Victor Stinner 2011-12-11 22:22:39 +01:00
parent e6b2d4407a
commit eaab604829
1 changed files with 34 additions and 34 deletions
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34
Objects/unicodeobject.c
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@ -9211,6 +9211,7 @@ fixup(PyObject *self,
{ {
PyObject *u; PyObject *u;
Py_UCS4 maxchar_old, maxchar_new = 0; Py_UCS4 maxchar_old, maxchar_new = 0;
PyObject *v;
u = PyUnicode_Copy(self); u = PyUnicode_Copy(self);
if (u == NULL) if (u == NULL)
@ -9222,9 +9223,19 @@ fixup(PyObject *self,
everything is fine. Otherwise we need to change the string kind everything is fine. Otherwise we need to change the string kind
and re-run the fix function. */ and re-run the fix function. */
maxchar_new = fixfct(u); maxchar_new = fixfct(u);
if (maxchar_new == 0)
/* do nothing, keep maxchar_new at 0 which means no changes. */; if (maxchar_new == 0) {
else if (maxchar_new <= 127) /* no changes */;
if (PyUnicode_CheckExact(self)) {
Py_DECREF(u);
Py_INCREF(self);
return self;
}
else
return u;
}
if (maxchar_new <= 127)
maxchar_new = 127; maxchar_new = 127;
else if (maxchar_new <= 255) else if (maxchar_new <= 255)
maxchar_new = 255; maxchar_new = 255;
@ -9233,21 +9244,12 @@ fixup(PyObject *self,
else else
maxchar_new = MAX_UNICODE; maxchar_new = MAX_UNICODE;
if (!maxchar_new && PyUnicode_CheckExact(self)) { if (maxchar_new == maxchar_old)
/* fixfct should return TRUE if it modified the buffer. If
FALSE, return a reference to the original buffer instead
(to save space, not time) */
Py_INCREF(self);
Py_DECREF(u);
return self;
}
else if (maxchar_new == maxchar_old) {
return u; return u;
}
else {
/* In case the maximum character changed, we need to /* In case the maximum character changed, we need to
convert the string to the new category. */ convert the string to the new category. */
PyObject *v = PyUnicode_New(PyUnicode_GET_LENGTH(self), maxchar_new); v = PyUnicode_New(PyUnicode_GET_LENGTH(self), maxchar_new);
if (v == NULL) { if (v == NULL) {
Py_DECREF(u); Py_DECREF(u);
return NULL; return NULL;
@ -9263,11 +9265,9 @@ fixup(PyObject *self,
else { else {
copy_characters(v, 0, u, 0, PyUnicode_GET_LENGTH(self)); copy_characters(v, 0, u, 0, PyUnicode_GET_LENGTH(self));
} }
Py_DECREF(u); Py_DECREF(u);
assert(_PyUnicode_CheckConsistency(v, 1)); assert(_PyUnicode_CheckConsistency(v, 1));
return v; return v;
}
} }
static Py_UCS4 static Py_UCS4