[Libguestfs] [PATCH v2] python: add simple wrappers for PyObject<->string functions
Pino Toscano
ptoscano at redhat.com
Tue May 9 13:48:29 UTC 2017
The current need for #ifdef's based on the presence of
PyString_FromString makes both the OCaml code of the generator, and the
generated C code a mess to read.
Hence, add three simple wrappers to make both the OCaml, and C code more
readable, and easier to tweak in the future.
---
generator/python.ml | 72 ++++++++++++-----------------------------------------
python/handle.c | 65 ++++++++++++++++++++++++++---------------------
2 files changed, 53 insertions(+), 84 deletions(-)
diff --git a/generator/python.ml b/generator/python.ml
index 0162733..cf08294 100644
--- a/generator/python.ml
+++ b/generator/python.ml
@@ -91,6 +91,9 @@ extern PyObject *guestfs_int_py_event_to_string (PyObject *self, PyObject *args)
extern char **guestfs_int_py_get_string_list (PyObject *obj);
extern PyObject *guestfs_int_py_put_string_list (char * const * const argv);
extern PyObject *guestfs_int_py_put_table (char * const * const argv);
+extern PyObject *guestfs_int_py_fromstring (const char *str);
+extern PyObject *guestfs_int_py_fromstringsize (const char *str, size_t size);
+extern char *guestfs_int_py_asstring (PyObject *obj);
";
@@ -178,31 +181,16 @@ and generate_python_structs () =
function
| name, FString ->
pr " PyDict_SetItemString (dict, \"%s\",\n" name;
- pr "#ifdef HAVE_PYSTRING_ASSTRING\n";
- pr " PyString_FromString (%s->%s));\n"
- typ name;
- pr "#else\n";
- pr " PyUnicode_FromString (%s->%s));\n"
- typ name;
- pr "#endif\n"
+ pr " guestfs_int_py_fromstring (%s->%s));\n"
+ typ name
| name, FBuffer ->
pr " PyDict_SetItemString (dict, \"%s\",\n" name;
- pr "#ifdef HAVE_PYSTRING_ASSTRING\n";
- pr " PyString_FromStringAndSize (%s->%s, %s->%s_len));\n"
- typ name typ name;
- pr "#else\n";
- pr " PyBytes_FromStringAndSize (%s->%s, %s->%s_len));\n"
- typ name typ name;
- pr "#endif\n"
+ pr " guestfs_int_py_fromstringsize (%s->%s, %s->%s_len));\n"
+ typ name typ name
| name, FUUID ->
pr " PyDict_SetItemString (dict, \"%s\",\n" name;
- pr "#ifdef HAVE_PYSTRING_ASSTRING\n";
- pr " PyString_FromStringAndSize (%s->%s, 32));\n"
- typ name;
- pr "#else\n";
- pr " PyBytes_FromStringAndSize (%s->%s, 32));\n"
- typ name;
- pr "#endif\n"
+ pr " guestfs_int_py_fromstringsize (%s->%s, 32));\n"
+ typ name
| name, (FBytes|FUInt64) ->
pr " PyDict_SetItemString (dict, \"%s\",\n" name;
pr " PyLong_FromUnsignedLongLong (%s->%s));\n"
@@ -229,15 +217,9 @@ and generate_python_structs () =
pr " PyDict_SetItemString (dict, \"%s\", Py_None);\n" name;
pr " }\n"
| name, FChar ->
- pr "#ifdef HAVE_PYSTRING_ASSTRING\n";
pr " PyDict_SetItemString (dict, \"%s\",\n" name;
- pr " PyString_FromStringAndSize (&%s->%s, 1));\n"
- typ name;
- pr "#else\n";
- pr " PyDict_SetItemString (dict, \"%s\",\n" name;
- pr " PyUnicode_FromStringAndSize (&%s->%s, 1));\n"
- typ name;
- pr "#endif\n"
+ pr " guestfs_int_py_fromstringsize (&%s->%s, 1));\n"
+ typ name
) cols;
pr " return dict;\n";
pr "};\n";
@@ -419,13 +401,7 @@ and generate_python_actions actions () =
pr " optargs_s.%s = PyLong_AsLongLong (py_%s);\n" n n;
pr " if (PyErr_Occurred ()) goto out;\n"
| OString _ ->
- pr "#ifdef HAVE_PYSTRING_ASSTRING\n";
- pr " optargs_s.%s = PyString_AsString (py_%s);\n" n n;
- pr "#else\n";
- pr " PyObject *bytes;\n";
- pr " bytes = PyUnicode_AsUTF8String (py_%s);\n" n;
- pr " optargs_s.%s = PyBytes_AS_STRING (bytes);\n" n;
- pr "#endif\n";
+ pr " optargs_s.%s = guestfs_int_py_asstring (py_%s);\n" n n
| OStringList _ ->
pr " optargs_s.%s = guestfs_int_py_get_string_list (py_%s);\n" n n;
pr " if (!optargs_s.%s) goto out;\n" n;
@@ -480,30 +456,18 @@ and generate_python_actions actions () =
| RBool _ -> pr " py_r = PyLong_FromLong ((long) r);\n"
| RInt64 _ -> pr " py_r = PyLong_FromLongLong (r);\n"
| RConstString _ ->
- pr "#ifdef HAVE_PYSTRING_ASSTRING\n";
- pr " py_r = PyString_FromString (r);\n";
- pr "#else\n";
- pr " py_r = PyUnicode_FromString (r);\n";
- pr "#endif\n";
+ pr " py_r = guestfs_int_py_fromstring (r);\n";
pr " if (py_r == NULL) goto out;\n";
| RConstOptString _ ->
pr " if (r) {\n";
- pr "#ifdef HAVE_PYSTRING_ASSTRING\n";
- pr " py_r = PyString_FromString (r);\n";
- pr "#else\n";
- pr " py_r = PyUnicode_FromString (r);\n";
- pr "#endif\n";
+ pr " py_r = guestfs_int_py_fromstring (r);\n";
pr " } else {\n";
pr " Py_INCREF (Py_None);\n";
pr " py_r = Py_None;\n";
pr " }\n";
pr " if (py_r == NULL) goto out;\n";
| RString _ ->
- pr "#ifdef HAVE_PYSTRING_ASSTRING\n";
- pr " py_r = PyString_FromString (r);\n";
- pr "#else\n";
- pr " py_r = PyUnicode_FromString (r);\n";
- pr "#endif\n";
+ pr " py_r = guestfs_int_py_fromstring (r);\n";
pr " free (r);\n";
pr " if (py_r == NULL) goto out;\n";
| RStringList _ ->
@@ -519,11 +483,7 @@ and generate_python_actions actions () =
pr " py_r = guestfs_int_py_put_table (r);\n";
pr " guestfs_int_free_string_list (r);\n"
| RBufferOut _ ->
- pr "#ifdef HAVE_PYSTRING_ASSTRING\n";
- pr " py_r = PyString_FromStringAndSize (r, size);\n";
- pr "#else\n";
- pr " py_r = PyBytes_FromStringAndSize (r, size);\n";
- pr "#endif\n";
+ pr " py_r = guestfs_int_py_fromstringsize (r, size);\n";
pr " free (r);\n";
pr " if (py_r == NULL) goto out;\n";
);
diff --git a/python/handle.c b/python/handle.c
index 806408f..f347c00 100644
--- a/python/handle.c
+++ b/python/handle.c
@@ -241,11 +241,7 @@ guestfs_int_py_event_to_string (PyObject *self, PyObject *args)
return NULL;
}
-#ifdef HAVE_PYSTRING_ASSTRING
- py_r = PyString_FromString (str);
-#else
- py_r = PyUnicode_FromString (str);
-#endif
+ py_r = guestfs_int_py_fromstring (str);
free (str);
return py_r;
@@ -298,9 +294,6 @@ guestfs_int_py_get_string_list (PyObject *obj)
{
size_t i, len;
char **r;
-#ifndef HAVE_PYSTRING_ASSTRING
- PyObject *bytes;
-#endif
assert (obj);
@@ -321,14 +314,8 @@ guestfs_int_py_get_string_list (PyObject *obj)
return NULL;
}
- for (i = 0; i < len; ++i) {
-#ifdef HAVE_PYSTRING_ASSTRING
- r[i] = PyString_AsString (PyList_GetItem (obj, i));
-#else
- bytes = PyUnicode_AsUTF8String (PyList_GetItem (obj, i));
- r[i] = PyBytes_AS_STRING (bytes);
-#endif
- }
+ for (i = 0; i < len; ++i)
+ r[i] = guestfs_int_py_asstring (PyList_GetItem (obj, i));
r[len] = NULL;
return r;
@@ -345,11 +332,7 @@ guestfs_int_py_put_string_list (char * const * const argv)
list = PyList_New (argc);
for (i = 0; i < argc; ++i) {
-#ifdef HAVE_PYSTRING_ASSTRING
- PyList_SetItem (list, i, PyString_FromString (argv[i]));
-#else
- PyList_SetItem (list, i, PyUnicode_FromString (argv[i]));
-#endif
+ PyList_SetItem (list, i, guestfs_int_py_fromstring (argv[i]));
}
return list;
@@ -367,15 +350,41 @@ guestfs_int_py_put_table (char * const * const argv)
list = PyList_New (argc >> 1);
for (i = 0; i < argc; i += 2) {
item = PyTuple_New (2);
-#ifdef HAVE_PYSTRING_ASSTRING
- PyTuple_SetItem (item, 0, PyString_FromString (argv[i]));
- PyTuple_SetItem (item, 1, PyString_FromString (argv[i+1]));
-#else
- PyTuple_SetItem (item, 0, PyUnicode_FromString (argv[i]));
- PyTuple_SetItem (item, 1, PyUnicode_FromString (argv[i+1]));
-#endif
+ PyTuple_SetItem (item, 0, guestfs_int_py_fromstring (argv[i]));
+ PyTuple_SetItem (item, 1, guestfs_int_py_fromstring (argv[i+1]));
PyList_SetItem (list, i >> 1, item);
}
return list;
}
+
+PyObject *
+guestfs_int_py_fromstring (const char *str)
+{
+#ifdef HAVE_PYSTRING_ASSTRING
+ return PyString_FromString (str);
+#else
+ return PyUnicode_FromString (str);
+#endif
+}
+
+PyObject *
+guestfs_int_py_fromstringsize (const char *str, size_t size)
+{
+#ifdef HAVE_PYSTRING_ASSTRING
+ return PyString_FromStringAndSize (str, size);
+#else
+ return PyString_FromStringAndSize (str, size);
+#endif
+}
+
+char *
+guestfs_int_py_asstring (PyObject *obj)
+{
+#ifdef HAVE_PYSTRING_ASSTRING
+ return PyString_AsString (obj);
+#else
+ PyObject *bytes = PyUnicode_AsUTF8String (obj);
+ return PyBytes_AS_STRING (bytes);
+#endif
+}
--
2.9.3
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