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qemu-patch-raspberry4/replay/replay-input.c
Eric Blake 51e72bc1dd qapi: Swap visit_* arguments for consistent 'name' placement 
JSON uses "name":value, but many of our visitor interfaces were
called with visit_type_FOO(v, &value, name, errp).  This can be
a bit confusing to have to mentally swap the parameter order to
match JSON order.  It's particularly bad for visit_start_struct(),
where the 'name' parameter is smack in the middle of the
otherwise-related group of 'obj, kind, size' parameters! It's
time to do a global swap of the parameter ordering, so that the
'name' parameter is always immediately after the Visitor argument.

Additional reason in favor of the swap: the existing include/qjson.h
prefers listing 'name' first in json_prop_*(), and I have plans to
unify that file with the qapi visitors; listing 'name' first in
qapi will minimize churn to the (admittedly few) qjson.h clients.

Later patches will then fix docs, object.h, visitor-impl.h, and
those clients to match.

Done by first patching scripts/qapi*.py by hand to make generated
files do what I want, then by running the following Coccinelle
script to affect the rest of the code base:
 $ spatch --sp-file script `git grep -l '\bvisit_' -- '**/*.[ch]'`
I then had to apply some touchups (Coccinelle insisted on TAB
indentation in visitor.h, and botched the signature of
visit_type_enum() by rewriting 'const char *const strings[]' to
the syntactically invalid 'const char*const[] strings').  The
movement of parameters is sufficient to provoke compiler errors
if any callers were missed.

    // Part 1: Swap declaration order
    @@
    type TV, TErr, TObj, T1, T2;
    identifier OBJ, ARG1, ARG2;
    @@
     void visit_start_struct
    -(TV v, TObj OBJ, T1 ARG1, const char *name, T2 ARG2, TErr errp)
    +(TV v, const char *name, TObj OBJ, T1 ARG1, T2 ARG2, TErr errp)
     { ... }

    @@
    type bool, TV, T1;
    identifier ARG1;
    @@
     bool visit_optional
    -(TV v, T1 ARG1, const char *name)
    +(TV v, const char *name, T1 ARG1)
     { ... }

    @@
    type TV, TErr, TObj, T1;
    identifier OBJ, ARG1;
    @@
     void visit_get_next_type
    -(TV v, TObj OBJ, T1 ARG1, const char *name, TErr errp)
    +(TV v, const char *name, TObj OBJ, T1 ARG1, TErr errp)
     { ... }

    @@
    type TV, TErr, TObj, T1, T2;
    identifier OBJ, ARG1, ARG2;
    @@
     void visit_type_enum
    -(TV v, TObj OBJ, T1 ARG1, T2 ARG2, const char *name, TErr errp)
    +(TV v, const char *name, TObj OBJ, T1 ARG1, T2 ARG2, TErr errp)
     { ... }

    @@
    type TV, TErr, TObj;
    identifier OBJ;
    identifier VISIT_TYPE =~ "^visit_type_";
    @@
     void VISIT_TYPE
    -(TV v, TObj OBJ, const char *name, TErr errp)
    +(TV v, const char *name, TObj OBJ, TErr errp)
     { ... }

    // Part 2: swap caller order
    @@
    expression V, NAME, OBJ, ARG1, ARG2, ERR;
    identifier VISIT_TYPE =~ "^visit_type_";
    @@
    (
    -visit_start_struct(V, OBJ, ARG1, NAME, ARG2, ERR)
    +visit_start_struct(V, NAME, OBJ, ARG1, ARG2, ERR)
    |
    -visit_optional(V, ARG1, NAME)
    +visit_optional(V, NAME, ARG1)
    |
    -visit_get_next_type(V, OBJ, ARG1, NAME, ERR)
    +visit_get_next_type(V, NAME, OBJ, ARG1, ERR)
    |
    -visit_type_enum(V, OBJ, ARG1, ARG2, NAME, ERR)
    +visit_type_enum(V, NAME, OBJ, ARG1, ARG2, ERR)
    |
    -VISIT_TYPE(V, OBJ, NAME, ERR)
    +VISIT_TYPE(V, NAME, OBJ, ERR)
    )

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <1454075341-13658-19-git-send-email-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-02-08 17:29:56 +01:00

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/*
* replay-input.c
*
* Copyright (c) 2010-2015 Institute for System Programming
* of the Russian Academy of Sciences.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "sysemu/replay.h"
#include "replay-internal.h"
#include "qemu/notify.h"
#include "ui/input.h"
#include "qapi/qmp-output-visitor.h"
#include "qapi/qmp-input-visitor.h"
#include "qapi-visit.h"
static InputEvent *qapi_clone_InputEvent(InputEvent *src)
{
QmpOutputVisitor *qov;
QmpInputVisitor *qiv;
Visitor *ov, *iv;
QObject *obj;
InputEvent *dst = NULL;
qov = qmp_output_visitor_new();
ov = qmp_output_get_visitor(qov);
visit_type_InputEvent(ov, NULL, &src, &error_abort);
obj = qmp_output_get_qobject(qov);
qmp_output_visitor_cleanup(qov);
if (!obj) {
return NULL;
}
qiv = qmp_input_visitor_new(obj);
iv = qmp_input_get_visitor(qiv);
visit_type_InputEvent(iv, NULL, &dst, &error_abort);
qmp_input_visitor_cleanup(qiv);
qobject_decref(obj);
return dst;
}
void replay_save_input_event(InputEvent *evt)
{
replay_put_dword(evt->type);
switch (evt->type) {
case INPUT_EVENT_KIND_KEY:
replay_put_dword(evt->u.key->key->type);
switch (evt->u.key->key->type) {
case KEY_VALUE_KIND_NUMBER:
replay_put_qword(evt->u.key->key->u.number);
replay_put_byte(evt->u.key->down);
break;
case KEY_VALUE_KIND_QCODE:
replay_put_dword(evt->u.key->key->u.qcode);
replay_put_byte(evt->u.key->down);
break;
case KEY_VALUE_KIND__MAX:
/* keep gcc happy */
break;
}
break;
case INPUT_EVENT_KIND_BTN:
replay_put_dword(evt->u.btn->button);
replay_put_byte(evt->u.btn->down);
break;
case INPUT_EVENT_KIND_REL:
replay_put_dword(evt->u.rel->axis);
replay_put_qword(evt->u.rel->value);
break;
case INPUT_EVENT_KIND_ABS:
replay_put_dword(evt->u.abs->axis);
replay_put_qword(evt->u.abs->value);
break;
case INPUT_EVENT_KIND__MAX:
/* keep gcc happy */
break;
}
}
InputEvent *replay_read_input_event(void)
{
InputEvent evt;
KeyValue keyValue;
InputKeyEvent key;
key.key = &keyValue;
InputBtnEvent btn;
InputMoveEvent rel;
InputMoveEvent abs;
evt.type = replay_get_dword();
switch (evt.type) {
case INPUT_EVENT_KIND_KEY:
evt.u.key = &key;
evt.u.key->key->type = replay_get_dword();
switch (evt.u.key->key->type) {
case KEY_VALUE_KIND_NUMBER:
evt.u.key->key->u.number = replay_get_qword();
evt.u.key->down = replay_get_byte();
break;
case KEY_VALUE_KIND_QCODE:
evt.u.key->key->u.qcode = (QKeyCode)replay_get_dword();
evt.u.key->down = replay_get_byte();
break;
case KEY_VALUE_KIND__MAX:
/* keep gcc happy */
break;
}
break;
case INPUT_EVENT_KIND_BTN:
evt.u.btn = &btn;
evt.u.btn->button = (InputButton)replay_get_dword();
evt.u.btn->down = replay_get_byte();
break;
case INPUT_EVENT_KIND_REL:
evt.u.rel = &rel;
evt.u.rel->axis = (InputAxis)replay_get_dword();
evt.u.rel->value = replay_get_qword();
break;
case INPUT_EVENT_KIND_ABS:
evt.u.abs = &abs;
evt.u.abs->axis = (InputAxis)replay_get_dword();
evt.u.abs->value = replay_get_qword();
break;
case INPUT_EVENT_KIND__MAX:
/* keep gcc happy */
break;
}
return qapi_clone_InputEvent(&evt);
}
void replay_input_event(QemuConsole *src, InputEvent *evt)
{
if (replay_mode == REPLAY_MODE_PLAY) {
/* Nothing */
} else if (replay_mode == REPLAY_MODE_RECORD) {
replay_add_input_event(qapi_clone_InputEvent(evt));
} else {
qemu_input_event_send_impl(src, evt);
}
}
void replay_input_sync_event(void)
{
if (replay_mode == REPLAY_MODE_PLAY) {
/* Nothing */
} else if (replay_mode == REPLAY_MODE_RECORD) {
replay_add_input_sync_event();
} else {
qemu_input_event_sync_impl();
}
}
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