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-rw-r--r--qobject/qjson.c294
1 files changed, 294 insertions, 0 deletions
diff --git a/qobject/qjson.c b/qobject/qjson.c
new file mode 100644
index 0000000000..83a6b4f7c1
--- /dev/null
+++ b/qobject/qjson.c
@@ -0,0 +1,294 @@
+/*
+ * QObject JSON integration
+ *
+ * Copyright IBM, Corp. 2009
+ *
+ * Authors:
+ * Anthony Liguori <aliguori@us.ibm.com>
+ *
+ * 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"
+
+typedef struct JSONParsingState
+{
+ JSONMessageParser parser;
+ va_list *ap;
+ QObject *result;
+} JSONParsingState;
+
+static void parse_json(JSONMessageParser *parser, QList *tokens)
+{
+ JSONParsingState *s = container_of(parser, JSONParsingState, parser);
+ s->result = json_parser_parse(tokens, s->ap);
+}
+
+QObject *qobject_from_jsonv(const char *string, va_list *ap)
+{
+ 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);
+
+ return state.result;
+}
+
+QObject *qobject_from_json(const char *string)
+{
+ return qobject_from_jsonv(string, NULL);
+}
+
+/*
+ * IMPORTANT: This function aborts on error, thus it must not
+ * be used with untrusted arguments.
+ */
+QObject *qobject_from_jsonf(const char *string, ...)
+{
+ QObject *obj;
+ va_list ap;
+
+ va_start(ap, string);
+ obj = qobject_from_jsonv(string, &ap);
+ va_end(ap);
+
+ assert(obj != NULL);
+ return obj;
+}
+
+typedef struct ToJsonIterState
+{
+ int indent;
+ int pretty;
+ int count;
+ QString *str;
+} ToJsonIterState;
+
+static void to_json(const QObject *obj, QString *str, int pretty, int indent);
+
+static void to_json_dict_iter(const char *key, QObject *obj, void *opaque)
+{
+ 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++;
+}
+
+static void to_json_list_iter(QObject *obj, void *opaque)
+{
+ 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++;
+}
+
+static void to_json(const QObject *obj, QString *str, int pretty, int indent)
+{
+ 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--;
+ }
+
+ 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);
+
+ 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;
+ }
+}
+
+QString *qobject_to_json(const QObject *obj)
+{
+ QString *str = qstring_new();
+
+ to_json(obj, str, 0, 0);
+
+ return str;
+}
+
+QString *qobject_to_json_pretty(const QObject *obj)
+{
+ QString *str = qstring_new();
+
+ to_json(obj, str, 1, 0);
+
+ return str;
+}
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