migration: Replace migration's JSON writer by the general one

Commit 8118f0950f "migration: Append JSON description of migration
stream" needs a JSON writer.  The existing qobject_to_json() wasn't a
good fit, because it requires building a QObject to convert.  Instead,
migration got its very own JSON writer, in commit 190c882ce2 "QJSON:
Add JSON writer".  It tacitly limits numbers to int64_t, and strings
contents to characters that don't need escaping, unlike
qobject_to_json().

The previous commit factored the JSON writer out of qobject_to_json().
Replace migration's JSON writer by it.

Cc: Juan Quintela <quintela@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20201211171152.146877-17-armbru@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

1 files changed, 0 insertions, 114 deletions

diff --git a/migration/qjson.c b/migration/qjson.c
deleted file mode 100644
index e9889bdcb0..0000000000
--- a/migration/qjson.c
+++ /dev/null
@@ -1,114 +0,0 @@
-/*
- * A simple JSON writer
- *
- * Copyright Alexander Graf
- *
- * Authors:
- *  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.
- *
- */
-
-/*
- * Type QJSON lets you build JSON text.  Its interface mirrors (a
- * subset of) abstract JSON syntax.
- *
- * It does *not* detect incorrect use.  It happily produces invalid
- * JSON then.  This is what migration wants.
- *
- * QAPI output visitors also produce JSON text.  However, they do
- * assert their preconditions and invariants, and therefore abort on
- * incorrect use.
- */
-
-#include "qemu/osdep.h"
-#include "qapi/qmp/qstring.h"
-#include "qjson.h"
-
-struct QJSON {
-    QString *str;
-    bool omit_comma;
-};
-
-static void json_emit_element(QJSON *json, const char *name)
-{
-    /* Check whether we need to print a , before an element */
-    if (json->omit_comma) {
-        json->omit_comma = false;
-    } else {
-        qstring_append(json->str, ", ");
-    }
-
-    if (name) {
-        qstring_append(json->str, "\"");
-        qstring_append(json->str, name);
-        qstring_append(json->str, "\" : ");
-    }
-}
-
-void json_start_object(QJSON *json, const char *name)
-{
-    json_emit_element(json, name);
-    qstring_append(json->str, "{ ");
-    json->omit_comma = true;
-}
-
-void json_end_object(QJSON *json)
-{
-    qstring_append(json->str, " }");
-    json->omit_comma = false;
-}
-
-void json_start_array(QJSON *json, const char *name)
-{
-    json_emit_element(json, name);
-    qstring_append(json->str, "[ ");
-    json->omit_comma = true;
-}
-
-void json_end_array(QJSON *json)
-{
-    qstring_append(json->str, " ]");
-    json->omit_comma = false;
-}
-
-void json_prop_int(QJSON *json, const char *name, int64_t val)
-{
-    json_emit_element(json, name);
-    qstring_append_int(json->str, val);
-}
-
-void json_prop_str(QJSON *json, const char *name, const char *str)
-{
-    json_emit_element(json, name);
-    qstring_append_chr(json->str, '"');
-    qstring_append(json->str, str);
-    qstring_append_chr(json->str, '"');
-}
-
-const char *qjson_get_str(QJSON *json)
-{
-    return qstring_get_str(json->str);
-}
-
-QJSON *qjson_new(void)
-{
-    QJSON *json = g_new0(QJSON, 1);
-
-    json->str = qstring_from_str("{ ");
-    json->omit_comma = true;
-    return json;
-}
-
-void qjson_finish(QJSON *json)
-{
-    json_end_object(json);
-}
-
-void qjson_destroy(QJSON *json)
-{
-    qobject_unref(json->str);
-    g_free(json);
-}