Michael Roth | e4e6aa1 | 2011-07-19 14:50:34 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Core Definitions for QAPI/QMP Command Registry |
| 3 | * |
| 4 | * Copyright IBM, Corp. 2011 |
| 5 | * |
| 6 | * Authors: |
| 7 | * Anthony Liguori <aliguori@us.ibm.com> |
| 8 | * |
| 9 | * This work is licensed under the terms of the GNU LGPL, version 2.1 or later. |
| 10 | * See the COPYING.LIB file in the top-level directory. |
| 11 | * |
| 12 | */ |
| 13 | |
Paolo Bonzini | 7b1b5d1 | 2012-12-17 18:19:43 +0100 | [diff] [blame] | 14 | #include "qapi/qmp-output-visitor.h" |
| 15 | #include "qapi/visitor-impl.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 16 | #include "qemu/queue.h" |
Michael Roth | e4e6aa1 | 2011-07-19 14:50:34 -0500 | [diff] [blame] | 17 | #include "qemu-common.h" |
Paolo Bonzini | 7b1b5d1 | 2012-12-17 18:19:43 +0100 | [diff] [blame] | 18 | #include "qapi/qmp/types.h" |
| 19 | #include "qapi/qmp/qerror.h" |
Michael Roth | e4e6aa1 | 2011-07-19 14:50:34 -0500 | [diff] [blame] | 20 | |
| 21 | typedef struct QStackEntry |
| 22 | { |
| 23 | QObject *value; |
Michael Roth | e1bc2f7 | 2011-09-19 19:03:11 -0500 | [diff] [blame] | 24 | bool is_list_head; |
Michael Roth | e4e6aa1 | 2011-07-19 14:50:34 -0500 | [diff] [blame] | 25 | QTAILQ_ENTRY(QStackEntry) node; |
| 26 | } QStackEntry; |
| 27 | |
| 28 | typedef QTAILQ_HEAD(QStack, QStackEntry) QStack; |
| 29 | |
| 30 | struct QmpOutputVisitor |
| 31 | { |
| 32 | Visitor visitor; |
| 33 | QStack stack; |
| 34 | }; |
| 35 | |
| 36 | #define qmp_output_add(qov, name, value) \ |
| 37 | qmp_output_add_obj(qov, name, QOBJECT(value)) |
| 38 | #define qmp_output_push(qov, value) qmp_output_push_obj(qov, QOBJECT(value)) |
| 39 | |
| 40 | static QmpOutputVisitor *to_qov(Visitor *v) |
| 41 | { |
| 42 | return container_of(v, QmpOutputVisitor, visitor); |
| 43 | } |
| 44 | |
| 45 | static void qmp_output_push_obj(QmpOutputVisitor *qov, QObject *value) |
| 46 | { |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 47 | QStackEntry *e = g_malloc0(sizeof(*e)); |
Michael Roth | e4e6aa1 | 2011-07-19 14:50:34 -0500 | [diff] [blame] | 48 | |
| 49 | e->value = value; |
Michael Roth | e1bc2f7 | 2011-09-19 19:03:11 -0500 | [diff] [blame] | 50 | if (qobject_type(e->value) == QTYPE_QLIST) { |
| 51 | e->is_list_head = true; |
| 52 | } |
Michael Roth | e4e6aa1 | 2011-07-19 14:50:34 -0500 | [diff] [blame] | 53 | QTAILQ_INSERT_HEAD(&qov->stack, e, node); |
| 54 | } |
| 55 | |
| 56 | static QObject *qmp_output_pop(QmpOutputVisitor *qov) |
| 57 | { |
| 58 | QStackEntry *e = QTAILQ_FIRST(&qov->stack); |
| 59 | QObject *value; |
| 60 | QTAILQ_REMOVE(&qov->stack, e, node); |
| 61 | value = e->value; |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 62 | g_free(e); |
Michael Roth | e4e6aa1 | 2011-07-19 14:50:34 -0500 | [diff] [blame] | 63 | return value; |
| 64 | } |
| 65 | |
| 66 | static QObject *qmp_output_first(QmpOutputVisitor *qov) |
| 67 | { |
| 68 | QStackEntry *e = QTAILQ_LAST(&qov->stack, QStack); |
Marcel Apfelbaum | 1d10b44 | 2014-05-26 15:40:55 +0300 | [diff] [blame] | 69 | |
| 70 | /* FIXME - find a better way to deal with NULL values */ |
| 71 | if (!e) { |
| 72 | return NULL; |
| 73 | } |
| 74 | |
Michael Roth | e4e6aa1 | 2011-07-19 14:50:34 -0500 | [diff] [blame] | 75 | return e->value; |
| 76 | } |
| 77 | |
| 78 | static QObject *qmp_output_last(QmpOutputVisitor *qov) |
| 79 | { |
| 80 | QStackEntry *e = QTAILQ_FIRST(&qov->stack); |
| 81 | return e->value; |
| 82 | } |
| 83 | |
| 84 | static void qmp_output_add_obj(QmpOutputVisitor *qov, const char *name, |
| 85 | QObject *value) |
| 86 | { |
| 87 | QObject *cur; |
| 88 | |
| 89 | if (QTAILQ_EMPTY(&qov->stack)) { |
| 90 | qmp_output_push_obj(qov, value); |
| 91 | return; |
| 92 | } |
| 93 | |
| 94 | cur = qmp_output_last(qov); |
| 95 | |
| 96 | switch (qobject_type(cur)) { |
| 97 | case QTYPE_QDICT: |
| 98 | qdict_put_obj(qobject_to_qdict(cur), name, value); |
| 99 | break; |
| 100 | case QTYPE_QLIST: |
| 101 | qlist_append_obj(qobject_to_qlist(cur), value); |
| 102 | break; |
| 103 | default: |
| 104 | qobject_decref(qmp_output_pop(qov)); |
| 105 | qmp_output_push_obj(qov, value); |
| 106 | break; |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | static void qmp_output_start_struct(Visitor *v, void **obj, const char *kind, |
| 111 | const char *name, size_t unused, |
| 112 | Error **errp) |
| 113 | { |
| 114 | QmpOutputVisitor *qov = to_qov(v); |
| 115 | QDict *dict = qdict_new(); |
| 116 | |
| 117 | qmp_output_add(qov, name, dict); |
| 118 | qmp_output_push(qov, dict); |
| 119 | } |
| 120 | |
| 121 | static void qmp_output_end_struct(Visitor *v, Error **errp) |
| 122 | { |
| 123 | QmpOutputVisitor *qov = to_qov(v); |
| 124 | qmp_output_pop(qov); |
| 125 | } |
| 126 | |
| 127 | static void qmp_output_start_list(Visitor *v, const char *name, Error **errp) |
| 128 | { |
| 129 | QmpOutputVisitor *qov = to_qov(v); |
| 130 | QList *list = qlist_new(); |
| 131 | |
| 132 | qmp_output_add(qov, name, list); |
| 133 | qmp_output_push(qov, list); |
| 134 | } |
| 135 | |
Michael Roth | e1bc2f7 | 2011-09-19 19:03:11 -0500 | [diff] [blame] | 136 | static GenericList *qmp_output_next_list(Visitor *v, GenericList **listp, |
Michael Roth | e4e6aa1 | 2011-07-19 14:50:34 -0500 | [diff] [blame] | 137 | Error **errp) |
| 138 | { |
Michael Roth | e1bc2f7 | 2011-09-19 19:03:11 -0500 | [diff] [blame] | 139 | GenericList *list = *listp; |
| 140 | QmpOutputVisitor *qov = to_qov(v); |
| 141 | QStackEntry *e = QTAILQ_FIRST(&qov->stack); |
| 142 | |
| 143 | assert(e); |
| 144 | if (e->is_list_head) { |
| 145 | e->is_list_head = false; |
| 146 | return list; |
| 147 | } |
| 148 | |
| 149 | return list ? list->next : NULL; |
Michael Roth | e4e6aa1 | 2011-07-19 14:50:34 -0500 | [diff] [blame] | 150 | } |
| 151 | |
| 152 | static void qmp_output_end_list(Visitor *v, Error **errp) |
| 153 | { |
| 154 | QmpOutputVisitor *qov = to_qov(v); |
| 155 | qmp_output_pop(qov); |
| 156 | } |
| 157 | |
| 158 | static void qmp_output_type_int(Visitor *v, int64_t *obj, const char *name, |
| 159 | Error **errp) |
| 160 | { |
| 161 | QmpOutputVisitor *qov = to_qov(v); |
| 162 | qmp_output_add(qov, name, qint_from_int(*obj)); |
| 163 | } |
| 164 | |
| 165 | static void qmp_output_type_bool(Visitor *v, bool *obj, const char *name, |
| 166 | Error **errp) |
| 167 | { |
| 168 | QmpOutputVisitor *qov = to_qov(v); |
| 169 | qmp_output_add(qov, name, qbool_from_int(*obj)); |
| 170 | } |
| 171 | |
| 172 | static void qmp_output_type_str(Visitor *v, char **obj, const char *name, |
| 173 | Error **errp) |
| 174 | { |
| 175 | QmpOutputVisitor *qov = to_qov(v); |
| 176 | if (*obj) { |
| 177 | qmp_output_add(qov, name, qstring_from_str(*obj)); |
| 178 | } else { |
| 179 | qmp_output_add(qov, name, qstring_from_str("")); |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | static void qmp_output_type_number(Visitor *v, double *obj, const char *name, |
| 184 | Error **errp) |
| 185 | { |
| 186 | QmpOutputVisitor *qov = to_qov(v); |
| 187 | qmp_output_add(qov, name, qfloat_from_double(*obj)); |
| 188 | } |
| 189 | |
Michael Roth | e4e6aa1 | 2011-07-19 14:50:34 -0500 | [diff] [blame] | 190 | QObject *qmp_output_get_qobject(QmpOutputVisitor *qov) |
| 191 | { |
| 192 | QObject *obj = qmp_output_first(qov); |
| 193 | if (obj) { |
| 194 | qobject_incref(obj); |
| 195 | } |
| 196 | return obj; |
| 197 | } |
| 198 | |
| 199 | Visitor *qmp_output_get_visitor(QmpOutputVisitor *v) |
| 200 | { |
| 201 | return &v->visitor; |
| 202 | } |
| 203 | |
| 204 | void qmp_output_visitor_cleanup(QmpOutputVisitor *v) |
| 205 | { |
| 206 | QStackEntry *e, *tmp; |
| 207 | |
Laszlo Ersek | f24582d | 2012-03-20 11:22:48 +0100 | [diff] [blame] | 208 | /* The bottom QStackEntry, if any, owns the root QObject. See the |
| 209 | * qmp_output_push_obj() invocations in qmp_output_add_obj(). */ |
| 210 | QObject *root = QTAILQ_EMPTY(&v->stack) ? NULL : qmp_output_first(v); |
| 211 | |
Michael Roth | e4e6aa1 | 2011-07-19 14:50:34 -0500 | [diff] [blame] | 212 | QTAILQ_FOREACH_SAFE(e, &v->stack, node, tmp) { |
| 213 | QTAILQ_REMOVE(&v->stack, e, node); |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 214 | g_free(e); |
Michael Roth | e4e6aa1 | 2011-07-19 14:50:34 -0500 | [diff] [blame] | 215 | } |
| 216 | |
Laszlo Ersek | f24582d | 2012-03-20 11:22:48 +0100 | [diff] [blame] | 217 | qobject_decref(root); |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 218 | g_free(v); |
Michael Roth | e4e6aa1 | 2011-07-19 14:50:34 -0500 | [diff] [blame] | 219 | } |
| 220 | |
| 221 | QmpOutputVisitor *qmp_output_visitor_new(void) |
| 222 | { |
| 223 | QmpOutputVisitor *v; |
| 224 | |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 225 | v = g_malloc0(sizeof(*v)); |
Michael Roth | e4e6aa1 | 2011-07-19 14:50:34 -0500 | [diff] [blame] | 226 | |
| 227 | v->visitor.start_struct = qmp_output_start_struct; |
| 228 | v->visitor.end_struct = qmp_output_end_struct; |
| 229 | v->visitor.start_list = qmp_output_start_list; |
| 230 | v->visitor.next_list = qmp_output_next_list; |
| 231 | v->visitor.end_list = qmp_output_end_list; |
Paolo Bonzini | 0f71a1e | 2012-02-09 09:11:52 +0100 | [diff] [blame] | 232 | v->visitor.type_enum = output_type_enum; |
Michael Roth | e4e6aa1 | 2011-07-19 14:50:34 -0500 | [diff] [blame] | 233 | v->visitor.type_int = qmp_output_type_int; |
| 234 | v->visitor.type_bool = qmp_output_type_bool; |
| 235 | v->visitor.type_str = qmp_output_type_str; |
| 236 | v->visitor.type_number = qmp_output_type_number; |
| 237 | |
| 238 | QTAILQ_INIT(&v->stack); |
| 239 | |
| 240 | return v; |
| 241 | } |