Issue #23280: Fix docstrings for binascii.(un)hexlify

Lib/test/test_binascii.py

@@ -162,7 +162,9 @@ class BinASCIITest(unittest.TestCase):
         self.assertRaises(binascii.Error, binascii.a2b_hex, t[:-1])
         self.assertRaises(binascii.Error, binascii.a2b_hex, t[:-1] + b'q')
 
-        self.assertEqual(binascii.hexlify(b'a'), b'61')
+        # Confirm that b2a_hex == hexlify and a2b_hex == unhexlify
+        self.assertEqual(binascii.hexlify(self.type2test(s)), t)
+        self.assertEqual(binascii.unhexlify(self.type2test(t)), u)
 
     def test_qp(self):
         # A test for SF bug 534347 (segfaults without the proper fix)

Modules/binascii.c

@@ -1147,6 +1147,20 @@ binascii_b2a_hex_impl(PyModuleDef *module, Py_buffer *data)
     return retval;
 }
 
+/*[clinic input]
+binascii.hexlify = binascii.b2a_hex
+
+Hexadecimal representation of binary data.
+
+The return value is a bytes object.
+[clinic start generated code]*/
+
+static PyObject *
+binascii_hexlify_impl(PyModuleDef *module, Py_buffer *data)
+/*[clinic end generated code: output=6098440091fb61dc input=2e3afae7f083f061]*/
+{
+    return binascii_b2a_hex_impl(module, data);
+}
 
 static int
 to_int(int c)
@@ -1221,6 +1235,21 @@ binascii_a2b_hex_impl(PyModuleDef *module, Py_buffer *hexstr)
     return NULL;
 }
 
+/*[clinic input]
+binascii.unhexlify = binascii.a2b_hex
+
+Binary data of hexadecimal representation.
+
+hexstr must contain an even number of hex digits (upper or lower case).
+[clinic start generated code]*/
+
+static PyObject *
+binascii_unhexlify_impl(PyModuleDef *module, Py_buffer *hexstr)
+/*[clinic end generated code: output=17cec7544499803e input=dd8c012725f462da]*/
+{
+    return binascii_a2b_hex_impl(module, hexstr);
+}
+
 static int table_hex[128] = {
   -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
   -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
@@ -1535,10 +1564,8 @@ static struct PyMethodDef binascii_module_methods[] = {
     BINASCII_B2A_HQX_METHODDEF
     BINASCII_A2B_HEX_METHODDEF
     BINASCII_B2A_HEX_METHODDEF
-    {"unhexlify", (PyCFunction)binascii_a2b_hex, METH_VARARGS,
+    BINASCII_HEXLIFY_METHODDEF
-        binascii_a2b_hex__doc__},
+    BINASCII_UNHEXLIFY_METHODDEF
-    {"hexlify", (PyCFunction)binascii_b2a_hex, METH_VARARGS,
-        binascii_b2a_hex__doc__},
     BINASCII_RLECODE_HQX_METHODDEF
     BINASCII_RLEDECODE_HQX_METHODDEF
     BINASCII_CRC_HQX_METHODDEF

Modules/clinic/binascii.c.h

@@ -367,6 +367,40 @@ exit:
     return return_value;
 }
 
+PyDoc_STRVAR(binascii_hexlify__doc__,
+"hexlify($module, data, /)\n"
+"--\n"
+"\n"
+"Hexadecimal representation of binary data.\n"
+"\n"
+"The return value is a bytes object.");
+
+#define BINASCII_HEXLIFY_METHODDEF    \
+    {"hexlify", (PyCFunction)binascii_hexlify, METH_VARARGS, binascii_hexlify__doc__},
+
+static PyObject *
+binascii_hexlify_impl(PyModuleDef *module, Py_buffer *data);
+
+static PyObject *
+binascii_hexlify(PyModuleDef *module, PyObject *args)
+{
+    PyObject *return_value = NULL;
+    Py_buffer data = {NULL, NULL};
+
+    if (!PyArg_ParseTuple(args,
+        "y*:hexlify",
+        &data))
+        goto exit;
+    return_value = binascii_hexlify_impl(module, &data);
+
+exit:
+    /* Cleanup for data */
+    if (data.obj)
+       PyBuffer_Release(&data);
+
+    return return_value;
+}
+
 PyDoc_STRVAR(binascii_a2b_hex__doc__,
 "a2b_hex($module, hexstr, /)\n"
 "--\n"
@@ -402,6 +436,40 @@ exit:
     return return_value;
 }
 
+PyDoc_STRVAR(binascii_unhexlify__doc__,
+"unhexlify($module, hexstr, /)\n"
+"--\n"
+"\n"
+"Binary data of hexadecimal representation.\n"
+"\n"
+"hexstr must contain an even number of hex digits (upper or lower case).");
+
+#define BINASCII_UNHEXLIFY_METHODDEF    \
+    {"unhexlify", (PyCFunction)binascii_unhexlify, METH_VARARGS, binascii_unhexlify__doc__},
+
+static PyObject *
+binascii_unhexlify_impl(PyModuleDef *module, Py_buffer *hexstr);
+
+static PyObject *
+binascii_unhexlify(PyModuleDef *module, PyObject *args)
+{
+    PyObject *return_value = NULL;
+    Py_buffer hexstr = {NULL, NULL};
+
+    if (!PyArg_ParseTuple(args,
+        "O&:unhexlify",
+        ascii_buffer_converter, &hexstr))
+        goto exit;
+    return_value = binascii_unhexlify_impl(module, &hexstr);
+
+exit:
+    /* Cleanup for hexstr */
+    if (hexstr.obj)
+       PyBuffer_Release(&hexstr);
+
+    return return_value;
+}
+
 PyDoc_STRVAR(binascii_a2b_qp__doc__,
 "a2b_qp($module, /, data, header=False)\n"
 "--\n"
@@ -475,4 +543,4 @@ exit:
 
     return return_value;
 }
-/*[clinic end generated code: output=68e2bcc6956b6213 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=e46d29f8c9adae7e input=a9049054013a1b77]*/