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authorAnthony Liguori <aliguori@us.ibm.com>2009-11-11 12:01:22 -0600
committerAnthony Liguori <aliguori@us.ibm.com>2009-11-17 08:49:40 -0600
commit1fd825f785975a430fbbaff7d80694cc7504360e (patch)
treeccf2103f2fd303e2c0910fb4037a512a6010099a /qjson.c
parent21f800d340ae080435f08e762d7b2868204c3772 (diff)
Provide marshalling mechanism for json
This introduces qobject_to_json which will convert a QObject to a JSON string representation. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'qjson.c')
-rw-r--r--qjson.c178
1 files changed, 178 insertions, 0 deletions
diff --git a/qjson.c b/qjson.c
index 45207f243..7270909af 100644
--- a/qjson.c
+++ b/qjson.c
@@ -15,6 +15,11 @@
#include "json-parser.h"
#include "json-streamer.h"
#include "qjson.h"
+#include "qint.h"
+#include "qlist.h"
+#include "qbool.h"
+#include "qfloat.h"
+#include "qdict.h"
typedef struct JSONParsingState
{
@@ -58,3 +63,176 @@ QObject *qobject_from_jsonf(const char *string, ...)
return state.result;
}
+
+typedef struct ToJsonIterState
+{
+ int count;
+ QString *str;
+} ToJsonIterState;
+
+static void to_json(const QObject *obj, QString *str);
+
+static void to_json_dict_iter(const char *key, QObject *obj, void *opaque)
+{
+ ToJsonIterState *s = opaque;
+ QString *qkey;
+
+ if (s->count) {
+ qstring_append(s->str, ", ");
+ }
+
+ qkey = qstring_from_str(key);
+ to_json(QOBJECT(qkey), s->str);
+ QDECREF(qkey);
+
+ qstring_append(s->str, ": ");
+ to_json(obj, s->str);
+ s->count++;
+}
+
+static void to_json_list_iter(QObject *obj, void *opaque)
+{
+ ToJsonIterState *s = opaque;
+
+ if (s->count) {
+ qstring_append(s->str, ", ");
+ }
+
+ to_json(obj, s->str);
+ s->count++;
+}
+
+static void to_json(const QObject *obj, QString *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 '\n':
+ qstring_append(str, "\\n");
+ break;
+ case '\r':
+ qstring_append(str, "\\r");
+ break;
+ case '\t':
+ qstring_append(str, "\\t");
+ break;
+ default: {
+ 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;
+ qstring_append(str, "{");
+ qdict_iter(val, to_json_dict_iter, &s);
+ qstring_append(str, "}");
+ break;
+ }
+ case QTYPE_QLIST: {
+ ToJsonIterState s;
+ QList *val = qobject_to_qlist(obj);
+
+ s.count = 0;
+ s.str = str;
+ qstring_append(str, "[");
+ qlist_iter(val, (void *)to_json_list_iter, &s);
+ 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_NONE:
+ break;
+ }
+}
+
+QString *qobject_to_json(const QObject *obj)
+{
+ QString *str = qstring_new();
+
+ to_json(obj, str);
+
+ return str;
+}