Merged revisions 77395 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/branches/py3k

........
  r77395 | benjamin.peterson | 2010-01-09 15:45:28 -0600 (Sat, 09 Jan 2010) | 2 lines

  Python strings ending with '\0' should not be equivalent to their C counterparts in PyUnicode_CompareWithASCIIString
........

3 files changed, 29 insertions, 1 deletions

diff --git a/Misc/NEWS b/Misc/NEWS
index f4583df..c09f8e6 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -57,7 +57,6 @@ Core and Builtins
 - Issue #6750: A text file opened with io.open() could duplicate its output
   when writing from multiple threads at the same time.
 
-
 Library
 -------
 
@@ -280,6 +279,12 @@ Tests
 
 - Issue #7042: Fix test_signal (test_itimer_virtual) failure on OS X 10.6.
 
+C-API
+-----
+
+- Make PyUnicode_CompareWithASCIIString return not equal if the Python string
+  has '\0' at the end.
+
 Build
 -----
 
diff --git a/Modules/_testcapimodule.c b/Modules/_testcapimodule.c
index 360ddbc..7480733 100644
--- a/Modules/_testcapimodule.c
+++ b/Modules/_testcapimodule.c
@@ -1093,6 +1093,23 @@ test_string_from_format(PyObject *self, PyObject *args)
 #undef CHECK_1_FORMAT
 }
 
+
+static PyObject *
+test_unicode_compare_with_ascii(PyObject *self) {
+	PyObject *py_s = PyUnicode_FromStringAndSize("str\0", 4);
+	int result;
+	if (py_s == NULL)
+		return NULL;
+	result = PyUnicode_CompareWithASCIIString(py_s, "str");
+	Py_DECREF(py_s);
+	if (!result) {
+		PyErr_SetString(TestError, "Python string ending in NULL "
+				"should not compare equal to c string.");
+		return NULL;
+	}
+	Py_RETURN_NONE;
+};
+
 /* This is here to provide a docstring for test_descr. */
 static PyObject *
 test_with_docstring(PyObject *self)
@@ -1524,6 +1541,7 @@ static PyMethodDef TestMethods[] = {
 	{"test_with_docstring", (PyCFunction)test_with_docstring, METH_NOARGS,
 	 PyDoc_STR("This is a pretty normal docstring.")},
 	{"test_string_to_double", (PyCFunction)test_string_to_double, METH_NOARGS},
+	{"test_unicode_compare_with_ascii", (PyCFunction)test_unicode_compare_with_ascii, METH_NOARGS},
 	{"test_capsule", (PyCFunction)test_capsule, METH_NOARGS},
 	{"getargs_tuple",	getargs_tuple,			 METH_VARARGS},
 	{"getargs_keywords", (PyCFunction)getargs_keywords, 
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 13db8c0..62bad6d 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -6932,6 +6932,11 @@ PyUnicode_CompareWithASCIIString(PyObject* uni, const char* str)
     for (i = 0; id[i] && str[i]; i++)
         if (id[i] != str[i])
             return ((int)id[i] < (int)str[i]) ? -1 : 1;
+    /* This check keeps Python strings that end in '\0' from comparing equal
+     to C strings identical up to that point. */
+    if (PyUnicode_GET_SIZE(uni) != i)
+        /* We'll say the Python string is longer. */
+        return 1;
     if (id[i])
         return 1; /* uni is longer */
     if (str[i])