/*
- * QObject JSON integration
+ * QEMU JSON writer
*
- * Copyright IBM, Corp. 2009
+ * Copyright Alexander Graf
*
* Authors:
- * Anthony Liguori <aliguori@us.ibm.com>
+ * Alexander Graf <agraf@suse.de>
*
* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
* See the COPYING.LIB file in the top-level directory.
*
*/
-#include "qapi/qmp/json-lexer.h"
-#include "qapi/qmp/json-parser.h"
-#include "qapi/qmp/json-streamer.h"
-#include "qapi/qmp/qjson.h"
-#include "qapi/qmp/qint.h"
-#include "qapi/qmp/qlist.h"
-#include "qapi/qmp/qbool.h"
-#include "qapi/qmp/qfloat.h"
-#include "qapi/qmp/qdict.h"
+#include <qapi/qmp/qstring.h>
+#include <stdbool.h>
+#include <glib.h>
+#include <qjson.h>
+#include <qemu/module.h>
+#include <qom/object.h>
-typedef struct JSONParsingState
-{
- JSONMessageParser parser;
- va_list *ap;
- QObject *result;
-} JSONParsingState;
+struct QJSON {
+ Object obj;
+ QString *str;
+ bool omit_comma;
+};
-static void parse_json(JSONMessageParser *parser, QList *tokens)
-{
- JSONParsingState *s = container_of(parser, JSONParsingState, parser);
- s->result = json_parser_parse(tokens, s->ap);
-}
+#define QJSON(obj) OBJECT_CHECK(QJSON, (obj), TYPE_QJSON)
-QObject *qobject_from_jsonv(const char *string, va_list *ap)
+static void json_emit_element(QJSON *json, const char *name)
{
- JSONParsingState state = {};
-
- state.ap = ap;
-
- json_message_parser_init(&state.parser, parse_json);
- json_message_parser_feed(&state.parser, string, strlen(string));
- json_message_parser_flush(&state.parser);
- json_message_parser_destroy(&state.parser);
+ /* Check whether we need to print a , before an element */
+ if (json->omit_comma) {
+ json->omit_comma = false;
+ } else {
+ qstring_append(json->str, ", ");
+ }
- return state.result;
+ if (name) {
+ qstring_append(json->str, "\"");
+ qstring_append(json->str, name);
+ qstring_append(json->str, "\" : ");
+ }
}
-QObject *qobject_from_json(const char *string)
+void json_start_object(QJSON *json, const char *name)
{
- return qobject_from_jsonv(string, NULL);
+ json_emit_element(json, name);
+ qstring_append(json->str, "{ ");
+ json->omit_comma = true;
}
-/*
- * IMPORTANT: This function aborts on error, thus it must not
- * be used with untrusted arguments.
- */
-QObject *qobject_from_jsonf(const char *string, ...)
+void json_end_object(QJSON *json)
{
- QObject *obj;
- va_list ap;
-
- va_start(ap, string);
- obj = qobject_from_jsonv(string, &ap);
- va_end(ap);
-
- assert(obj != NULL);
- return obj;
+ qstring_append(json->str, " }");
+ json->omit_comma = false;
}
-typedef struct ToJsonIterState
+void json_start_array(QJSON *json, const char *name)
{
- int indent;
- int pretty;
- int count;
- QString *str;
-} ToJsonIterState;
-
-static void to_json(const QObject *obj, QString *str, int pretty, int indent);
+ json_emit_element(json, name);
+ qstring_append(json->str, "[ ");
+ json->omit_comma = true;
+}
-static void to_json_dict_iter(const char *key, QObject *obj, void *opaque)
+void json_end_array(QJSON *json)
{
- ToJsonIterState *s = opaque;
- QString *qkey;
- int j;
-
- if (s->count)
- qstring_append(s->str, ", ");
-
- if (s->pretty) {
- qstring_append(s->str, "\n");
- for (j = 0 ; j < s->indent ; j++)
- qstring_append(s->str, " ");
- }
-
- qkey = qstring_from_str(key);
- to_json(QOBJECT(qkey), s->str, s->pretty, s->indent);
- QDECREF(qkey);
-
- qstring_append(s->str, ": ");
- to_json(obj, s->str, s->pretty, s->indent);
- s->count++;
+ qstring_append(json->str, " ]");
+ json->omit_comma = false;
}
-static void to_json_list_iter(QObject *obj, void *opaque)
+void json_prop_int(QJSON *json, const char *name, int64_t val)
{
- ToJsonIterState *s = opaque;
- int j;
-
- if (s->count)
- qstring_append(s->str, ", ");
-
- if (s->pretty) {
- qstring_append(s->str, "\n");
- for (j = 0 ; j < s->indent ; j++)
- qstring_append(s->str, " ");
- }
-
- to_json(obj, s->str, s->pretty, s->indent);
- s->count++;
+ json_emit_element(json, name);
+ qstring_append_int(json->str, val);
}
-static void to_json(const QObject *obj, QString *str, int pretty, int indent)
+void json_prop_str(QJSON *json, const char *name, const char *str)
{
- switch (qobject_type(obj)) {
- case QTYPE_QINT: {
- QInt *val = qobject_to_qint(obj);
- char buffer[1024];
-
- snprintf(buffer, sizeof(buffer), "%" PRId64, qint_get_int(val));
- qstring_append(str, buffer);
- break;
- }
- case QTYPE_QSTRING: {
- QString *val = qobject_to_qstring(obj);
- const char *ptr;
-
- ptr = qstring_get_str(val);
- qstring_append(str, "\"");
- while (*ptr) {
- if ((ptr[0] & 0xE0) == 0xE0 &&
- (ptr[1] & 0x80) && (ptr[2] & 0x80)) {
- uint16_t wchar;
- char escape[7];
-
- wchar = (ptr[0] & 0x0F) << 12;
- wchar |= (ptr[1] & 0x3F) << 6;
- wchar |= (ptr[2] & 0x3F);
- ptr += 2;
-
- snprintf(escape, sizeof(escape), "\\u%04X", wchar);
- qstring_append(str, escape);
- } else if ((ptr[0] & 0xE0) == 0xC0 && (ptr[1] & 0x80)) {
- uint16_t wchar;
- char escape[7];
-
- wchar = (ptr[0] & 0x1F) << 6;
- wchar |= (ptr[1] & 0x3F);
- ptr++;
-
- snprintf(escape, sizeof(escape), "\\u%04X", wchar);
- qstring_append(str, escape);
- } else switch (ptr[0]) {
- case '\"':
- qstring_append(str, "\\\"");
- break;
- case '\\':
- qstring_append(str, "\\\\");
- break;
- case '\b':
- qstring_append(str, "\\b");
- break;
- case '\f':
- qstring_append(str, "\\f");
- break;
- case '\n':
- qstring_append(str, "\\n");
- break;
- case '\r':
- qstring_append(str, "\\r");
- break;
- case '\t':
- qstring_append(str, "\\t");
- break;
- default: {
- if (ptr[0] <= 0x1F) {
- char escape[7];
- snprintf(escape, sizeof(escape), "\\u%04X", ptr[0]);
- qstring_append(str, escape);
- } else {
- char buf[2] = { ptr[0], 0 };
- qstring_append(str, buf);
- }
- break;
- }
- }
- ptr++;
- }
- qstring_append(str, "\"");
- break;
- }
- case QTYPE_QDICT: {
- ToJsonIterState s;
- QDict *val = qobject_to_qdict(obj);
-
- s.count = 0;
- s.str = str;
- s.indent = indent + 1;
- s.pretty = pretty;
- qstring_append(str, "{");
- qdict_iter(val, to_json_dict_iter, &s);
- if (pretty) {
- int j;
- qstring_append(str, "\n");
- for (j = 0 ; j < indent ; j++)
- qstring_append(str, " ");
- }
- qstring_append(str, "}");
- break;
- }
- case QTYPE_QLIST: {
- ToJsonIterState s;
- QList *val = qobject_to_qlist(obj);
-
- s.count = 0;
- s.str = str;
- s.indent = indent + 1;
- s.pretty = pretty;
- qstring_append(str, "[");
- qlist_iter(val, (void *)to_json_list_iter, &s);
- if (pretty) {
- int j;
- qstring_append(str, "\n");
- for (j = 0 ; j < indent ; j++)
- qstring_append(str, " ");
- }
- qstring_append(str, "]");
- break;
- }
- case QTYPE_QFLOAT: {
- QFloat *val = qobject_to_qfloat(obj);
- char buffer[1024];
- int len;
-
- len = snprintf(buffer, sizeof(buffer), "%f", qfloat_get_double(val));
- while (len > 0 && buffer[len - 1] == '0') {
- len--;
- }
+ json_emit_element(json, name);
+ qstring_append_chr(json->str, '"');
+ qstring_append(json->str, str);
+ qstring_append_chr(json->str, '"');
+}
- if (len && buffer[len - 1] == '.') {
- buffer[len - 1] = 0;
- } else {
- buffer[len] = 0;
- }
-
- qstring_append(str, buffer);
- break;
- }
- case QTYPE_QBOOL: {
- QBool *val = qobject_to_qbool(obj);
+const char *qjson_get_str(QJSON *json)
+{
+ return qstring_get_str(json->str);
+}
- if (qbool_get_int(val)) {
- qstring_append(str, "true");
- } else {
- qstring_append(str, "false");
- }
- break;
- }
- case QTYPE_QERROR:
- /* XXX: should QError be emitted? */
- case QTYPE_NONE:
- break;
- }
+QJSON *qjson_new(void)
+{
+ QJSON *json = QJSON(object_new(TYPE_QJSON));
+ return json;
}
-QString *qobject_to_json(const QObject *obj)
+void qjson_finish(QJSON *json)
{
- QString *str = qstring_new();
+ json_end_object(json);
+}
- to_json(obj, str, 0, 0);
+static void qjson_initfn(Object *obj)
+{
+ QJSON *json = QJSON(obj);
- return str;
+ json->str = qstring_from_str("{ ");
+ json->omit_comma = true;
}
-QString *qobject_to_json_pretty(const QObject *obj)
+static void qjson_finalizefn(Object *obj)
{
- QString *str = qstring_new();
+ QJSON *json = QJSON(obj);
+
+ qobject_decref(QOBJECT(json->str));
+}
- to_json(obj, str, 1, 0);
+static const TypeInfo qjson_type_info = {
+ .name = TYPE_QJSON,
+ .parent = TYPE_OBJECT,
+ .instance_size = sizeof(QJSON),
+ .instance_init = qjson_initfn,
+ .instance_finalize = qjson_finalizefn,
+};
- return str;
+static void qjson_register_types(void)
+{
+ type_register_static(&qjson_type_info);
}
+
+type_init(qjson_register_types)
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