[Libguestfs] [libnbd PATCH v2 4/8] python: Reformat generated methods.c in a few places
Eric Blake
eblake at redhat.com
Tue Jun 7 02:08:29 UTC 2022
To make argument parsing/building easier to follow, and make it so
that future type changes touch fewer lines of code, consolidate
several passes of List.iter to instead produce a list of tuples in one
pass. Now the python conversion character(s) are next to the code
that character matches. Compress the strings passed to
PyArg_ParseTuple and Py_BuildValue. Utilize py_wrap to avoid
generated lines that exceed 80 columns.
The change is solely in the formatting; no behavioral changes are
intended. The generated diff includes chunks such as:
| @@ -84,7 +84,8 @@ chunk_wrapper (void *user_data, const vo
| Py_DECREF (py_error_mod);
| if (!py_error) { PyErr_PrintEx (0); goto out; }
|
| - py_args = Py_BuildValue ("(" "y#" "K" "I" "O" ")", subbuf, (int) count, offset, status, py_error);
| + py_args = Py_BuildValue ("(y#KIO)", subbuf, (int) count, offset, status,
| + py_error);
| if (!py_args) { PyErr_PrintEx (0); goto out; }
|
| py_save = PyGILState_Ensure ();
...
| @@ -1054,7 +1031,8 @@ nbd_internal_py_set_tls_psk_file (PyObje
| }
|
| PyObject *
| -nbd_internal_py_set_request_structured_replies (PyObject *self, PyObject *args)
| +nbd_internal_py_set_request_structured_replies (PyObject *self,
| + PyObject *args)
| {
| PyObject *py_h;
| struct nbd_handle *h;
...
| @@ -2344,8 +2281,7 @@ nbd_internal_py_pread_structured (PyObje
| uint32_t flags_u32;
| unsigned int flags; /* really uint32_t */
|
| - if (!PyArg_ParseTuple (args, "O" "n" "K" "O" "I"
| - ":nbd_pread_structured",
| + if (!PyArg_ParseTuple (args, "OnKOI:nbd_pread_structured",
| &py_h, &count, &offset, &py_chunk_fn, &flags))
| goto out;
| h = get_handle (py_h);
| @@ -2365,7 +2301,8 @@ nbd_internal_py_pread_structured (PyObje
| Py_INCREF (py_chunk_fn);
| chunk_user_data->fn = py_chunk_fn;
|
| - ret = nbd_pread_structured (h, PyByteArray_AS_STRING (buf), count, offset_u64, chunk, flags_u32);
| + ret = nbd_pread_structured (h, PyByteArray_AS_STRING (buf), count,
| + offset_u64, chunk, flags_u32);
| chunk_user_data = NULL;
| if (ret == -1) {
| raise_exception ();
Suggested-by: Richard W.M. Jones <rjones at redhat.com>
---
generator/Python.ml | 201 ++++++++++++++++++--------------------------
1 file changed, 81 insertions(+), 120 deletions(-)
diff --git a/generator/Python.ml b/generator/Python.ml
index 8239803..6244c8e 100644
--- a/generator/Python.ml
+++ b/generator/Python.ml
@@ -209,30 +209,31 @@ let
) cbargs;
pr "\n";
- pr " py_args = Py_BuildValue (\"(\"";
- List.iter (
- function
- | CBArrayAndLen (UInt32 n, len) -> pr " \"O\""
- | CBBytesIn (n, len) -> pr " \"y#\""
- | CBInt n -> pr " \"i\""
- | CBInt64 n -> pr " \"L\""
- | CBMutable (Int n) -> pr " \"O\""
- | CBString n -> pr " \"s\""
- | CBUInt n -> pr " \"I\""
- | CBUInt64 n -> pr " \"K\""
- | CBArrayAndLen _ | CBMutable _ -> assert false
- ) cbargs;
- pr " \")\"";
- List.iter (
- function
- | CBArrayAndLen (UInt32 n, _) -> pr ", py_%s" n
- | CBBytesIn (n, len) -> pr ", %s, (int) %s" n len
- | CBMutable (Int n) -> pr ", py_%s" n
- | CBInt n | CBInt64 n
- | CBString n
- | CBUInt n | CBUInt64 n -> pr ", %s" n
- | CBArrayAndLen _ | CBMutable _ -> assert false
- ) cbargs;
+ let params =
+ List.map (
+ function
+ | CBArrayAndLen (UInt32 n, _) -> "O", sprintf "py_%s" n
+ | CBBytesIn (n, len) -> "y#", sprintf "%s, (int) %s" n len
+ | CBInt n -> "i", n
+ | CBInt64 n -> "L", n
+ | CBMutable (Int n) -> "O", sprintf "py_%s" n
+ | CBString n -> "s", n
+ | CBUInt n -> "I", n
+ | CBUInt64 n -> "K", n
+ | CBArrayAndLen _ | CBMutable _ -> assert false
+ ) cbargs in
+ pr " py_args = Py_BuildValue (";
+ pr_wrap ',' (fun () ->
+ pr "\"(";
+ List.iter (
+ function
+ | n, _ -> pr "%s" n
+ ) params;
+ pr ")\"";
+ List.iter (
+ function
+ | _, n -> pr ", %s" n
+ ) params);
pr ");\n";
pr " if (!py_args) { PyErr_PrintEx (0); goto out; }\n";
pr "\n";
@@ -284,7 +285,10 @@ let
(* Generate the Python binding. *)
let print_python_binding name { args; optargs; ret; may_set_error } =
pr "PyObject *\n";
- pr "nbd_internal_py_%s (PyObject *self, PyObject *args)\n" name;
+ pr "nbd_internal_py_%s (" name;
+ pr_wrap ',' (fun () ->
+ pr "PyObject *self, PyObject *args");
+ pr ")\n";
pr "{\n";
pr " PyObject *py_h;\n";
pr " struct nbd_handle *h;\n";
@@ -353,59 +357,52 @@ let
pr "\n";
(* Parse the Python parameters. *)
- pr " if (!PyArg_ParseTuple (args, \"O\"";
+ let params =
+ List.map (
+ function
+ | Bool n -> "p", sprintf "&%s" n, n
+ | BytesIn (n, _) -> "y*", sprintf "&%s" n, sprintf "%s.buf, %s.len" n n
+ | BytesOut (n, count) ->
+ "n", sprintf "&%s" count,
+ sprintf "PyByteArray_AS_STRING (%s), %s" n count
+ | BytesPersistIn (n, _) | BytesPersistOut (n, _) ->
+ "O", sprintf "&%s" n, sprintf "%s_buf->data, %s_buf->len" n n
+ | Closure { cbname } -> "O", sprintf "&py_%s_fn" cbname, cbname
+ | Enum (n, _) -> "i", sprintf "&%s" n, n
+ | Flags (n, _) -> "I", sprintf "&%s" n, sprintf "%s_u32" n
+ | Fd n | Int n -> "i", sprintf "&%s" n, n
+ | Int64 n -> "L", sprintf "&%s" n, sprintf "%s_i64" n
+ | Path n -> "O&", sprintf "PyUnicode_FSConverter, &py_%s" n, n
+ | SizeT n -> "n", sprintf "&%s" n, sprintf "(size_t)%s" n
+ | SockAddrAndLen (n, _) ->
+ "O", sprintf "&%s" n,
+ sprintf "(struct sockaddr *) &%s_sa, %s_len" n n
+ | String n -> "s", sprintf "&%s" n, n
+ | StringList n -> "O", sprintf "&py_%s" n, n
+ | UInt n | UIntPtr n -> "I", sprintf "&%s" n, n
+ | UInt32 n -> "I", sprintf "&%s" n, sprintf "%s_u32" n
+ | UInt64 n -> "K", sprintf "&%s" n, sprintf "%s_u64" n
+ ) args in
+ let optparams =
+ List.map (
+ function
+ | OClosure { cbname } -> "O", sprintf "&py_%s_fn" cbname, cbname
+ | OFlags (n, _, _) -> "I", sprintf "&%s" n, sprintf "%s_u32" n
+ ) optargs in
+ let params = params @ optparams in
+ pr " if (!PyArg_ParseTuple (args, \"O";
List.iter (
function
- | Bool n -> pr " \"p\""
- | BytesIn (n, _) -> pr " \"y*\""
- | BytesPersistIn (n, _) -> pr " \"O\""
- | BytesOut (_, count) -> pr " \"n\""
- | BytesPersistOut (_, count) -> pr " \"O\""
- | Closure _ -> pr " \"O\""
- | Enum _ -> pr " \"i\""
- | Flags _ -> pr " \"I\""
- | Fd n | Int n -> pr " \"i\""
- | Int64 n -> pr " \"L\""
- | Path n -> pr " \"O&\""
- | SizeT n -> pr " \"n\""
- | SockAddrAndLen (n, _) -> pr " \"O\""
- | String n -> pr " \"s\""
- | StringList n -> pr " \"O\""
- | UInt n | UIntPtr n -> pr " \"I\""
- | UInt32 n -> pr " \"I\""
- | UInt64 n -> pr " \"K\""
- ) args;
- List.iter (
- function
- | OClosure _ -> pr " \"O\""
- | OFlags _ -> pr " \"I\""
- ) optargs;
- pr "\n";
- pr " \":nbd_%s\",\n" name;
- pr " &py_h";
- List.iter (
- function
- | Bool n -> pr ", &%s" n
- | BytesIn (n, _) | BytesPersistIn (n, _)
- | BytesPersistOut (n, _) -> pr ", &%s" n
- | BytesOut (_, count) -> pr ", &%s" count
- | Closure { cbname } -> pr ", &py_%s_fn" cbname
- | Enum (n, _) -> pr ", &%s" n
- | Flags (n, _) -> pr ", &%s" n
- | Fd n | Int n | SizeT n | Int64 n -> pr ", &%s" n
- | Path n -> pr ", PyUnicode_FSConverter, &py_%s" n
- | SockAddrAndLen (n, _) -> pr ", &%s" n
- | String n -> pr ", &%s" n
- | StringList n -> pr ", &py_%s" n
- | UInt n | UIntPtr n -> pr ", &%s" n
- | UInt32 n -> pr ", &%s" n
- | UInt64 n -> pr ", &%s" n
- ) args;
- List.iter (
- function
- | OClosure { cbname } -> pr ", &py_%s_fn" cbname
- | OFlags (n, _, _) -> pr ", &%s" n
- ) optargs;
+ | n, _, _ -> pr "%s" n
+ ) params;
+ pr ":nbd_%s\",\n" name;
+ pr " ";
+ pr_wrap ',' (fun () ->
+ pr "&py_h";
+ List.iter (
+ function
+ | _, n, _ -> pr ", %s" n
+ ) params);
pr "))\n";
pr " goto out;\n";
@@ -489,33 +486,13 @@ let
pr " %s_buf->initialized = true;\n" n
| _ -> ()
) args;
- pr " ret = nbd_%s (h" name;
- List.iter (
- function
- | Bool n -> pr ", %s" n
- | BytesIn (n, _) -> pr ", %s.buf, %s.len" n n
- | BytesOut (n, count) -> pr ", PyByteArray_AS_STRING (%s), %s" n count
- | BytesPersistIn (n, _)
- | BytesPersistOut (n, _) -> pr ", %s_buf->data, %s_buf->len" n n
- | Closure { cbname } -> pr ", %s" cbname
- | Enum (n, _) -> pr ", %s" n
- | Flags (n, _) -> pr ", %s_u32" n
- | Fd n | Int n -> pr ", %s" n
- | Int64 n -> pr ", %s_i64" n
- | Path n -> pr ", %s" n
- | SizeT n -> pr ", (size_t)%s" n
- | SockAddrAndLen (n, _) -> pr ", (struct sockaddr *) &%s_sa, %s_len" n n
- | String n -> pr ", %s" n
- | StringList n -> pr ", %s" n
- | UInt n | UIntPtr n -> pr ", %s" n
- | UInt32 n -> pr ", %s_u32" n
- | UInt64 n -> pr ", %s_u64" n
- ) args;
- List.iter (
- function
- | OClosure { cbname } -> pr ", %s" cbname
- | OFlags (n, _, _) -> pr ", %s_u32" n
- ) optargs;
+ pr " ret = nbd_%s (" name;
+ pr_wrap ',' (fun () ->
+ pr "h";
+ List.iter (
+ function
+ | _, _, n -> pr ", %s" n
+ ) params);
pr ");\n";
List.iter (
function
@@ -543,23 +520,7 @@ let
pr " py_ret = %s;\n" n;
pr " %s = NULL;\n" n;
use_ret := false
- | Bool _
- | BytesIn _
- | BytesPersistIn _ | BytesPersistOut _
- | Closure _
- | Enum _
- | Flags _
- | Fd _ | Int _
- | Int64 _
- | Path _
- | SockAddrAndLen _
- | SizeT _
- | String _
- | StringList _
- | UInt _
- | UIntPtr _
- | UInt32 _
- | UInt64 _ -> ()
+ | _ -> ()
) args;
if !use_ret then (
match ret with
--
2.36.1
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