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qobject: Change qobject_to_json()'s value to GString

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qobject_to_json() and qobject_to_json_pretty() build a GString, then
covert it to QString.  Just one of the callers actually needs a
QString: qemu_rbd_parse_filename().  A few others need a string they
can modify: qmp_send_response(), qga's send_response(), to_json_str(),
and qmp_fd_vsend_fds().  The remainder just need a string.

Change qobject_to_json() and qobject_to_json_pretty() to return the
GString.

qemu_rbd_parse_filename() now has to convert to QString.  All others
save a QString temporary.  to_json_str() actually becomes a bit
simpler, because GString provides more convenient modification
functions.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20201211171152.146877-6-armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2020-12-11 18:11:37 +01:00
parent f1cc129df8
commit eab3a4678b
12 changed files with 79 additions and 93 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
block.c
View File

@ -6995,13 +6995,13 @@ void bdrv_refresh_filename(BlockDriverState *bs)
if (bs->exact_filename[0]) {
pstrcpy(bs->filename, sizeof(bs->filename), bs->exact_filename);
} else {
QString *json = qobject_to_json(QOBJECT(bs->full_open_options));
GString *json = qobject_to_json(QOBJECT(bs->full_open_options));
if (snprintf(bs->filename, sizeof(bs->filename), "json:%s",
qstring_get_str(json)) >= sizeof(bs->filename)) {
json->str) >= sizeof(bs->filename)) {
/* Give user a hint if we truncated things. */
strcpy(bs->filename + sizeof(bs->filename) - 4, "...");
}
qobject_unref(json);
g_string_free(json, true);
}
}

2
block/rbd.c
View File

@ -232,7 +232,7 @@ static void qemu_rbd_parse_filename(const char *filename, QDict *options,
if (keypairs) {
qdict_put(options, "=keyvalue-pairs",
qobject_to_json(QOBJECT(keypairs)));
qstring_from_gstring(qobject_to_json(QOBJECT(keypairs))));
}
done:

4
include/qapi/qmp/qjson.h
View File

@ -25,7 +25,7 @@ QDict *qdict_from_vjsonf_nofail(const char *string, va_list ap)
QDict *qdict_from_jsonf_nofail(const char *string, ...)
GCC_FMT_ATTR(1, 2);
QString *qobject_to_json(const QObject *obj);
QString *qobject_to_json_pretty(const QObject *obj, bool pretty);
GString *qobject_to_json(const QObject *obj);
GString *qobject_to_json_pretty(const QObject *obj, bool pretty);
#endif /* QJSON_H */

14
monitor/qmp.c
View File

@ -110,15 +110,15 @@ static void monitor_qmp_cleanup_queue_and_resume(MonitorQMP *mon)
void qmp_send_response(MonitorQMP *mon, const QDict *rsp)
{
const QObject *data = QOBJECT(rsp);
QString *json;
GString *json;
json = qobject_to_json_pretty(data, mon->pretty);
assert(json != NULL);
qstring_append_chr(json, '\n');
monitor_puts(&mon->common, qstring_get_str(json));
g_string_append_c(json, '\n');
monitor_puts(&mon->common, json->str);
qobject_unref(json);
g_string_free(json, true);
}
/*
@ -320,9 +320,9 @@ static void handle_qmp_command(void *opaque, QObject *req, Error *err)
} /* else will fail qmp_dispatch() */
if (req && trace_event_get_state_backends(TRACE_HANDLE_QMP_COMMAND)) {
QString *req_json = qobject_to_json(req);
trace_handle_qmp_command(mon, qstring_get_str(req_json));
qobject_unref(req_json);
GString *req_json = qobject_to_json(req);
trace_handle_qmp_command(mon, req_json->str);
g_string_free(req_json, true);
}
if (qdict && qmp_is_oob(qdict)) {

25
qemu-img.c
View File

@ -33,7 +33,6 @@
#include "qapi/qobject-output-visitor.h"
#include "qapi/qmp/qjson.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qstring.h"
#include "qemu/cutils.h"
#include "qemu/config-file.h"
#include "qemu/option.h"
@ -627,7 +626,7 @@ fail:
static void dump_json_image_check(ImageCheck *check, bool quiet)
{
QString *str;
GString *str;
QObject *obj;
Visitor *v = qobject_output_visitor_new(&obj);
@ -635,10 +634,10 @@ static void dump_json_image_check(ImageCheck *check, bool quiet)
visit_complete(v, &obj);
str = qobject_to_json_pretty(obj, true);
assert(str != NULL);
qprintf(quiet, "%s\n", qstring_get_str(str));
qprintf(quiet, "%s\n", str->str);
qobject_unref(obj);
visit_free(v);
qobject_unref(str);
g_string_free(str, true);
}
static void dump_human_image_check(ImageCheck *check, bool quiet)
@ -2789,7 +2788,7 @@ static void dump_snapshots(BlockDriverState *bs)
static void dump_json_image_info_list(ImageInfoList *list)
{
QString *str;
GString *str;
QObject *obj;
Visitor *v = qobject_output_visitor_new(&obj);
@ -2797,15 +2796,15 @@ static void dump_json_image_info_list(ImageInfoList *list)
visit_complete(v, &obj);
str = qobject_to_json_pretty(obj, true);
assert(str != NULL);
printf("%s\n", qstring_get_str(str));
printf("%s\n", str->str);
qobject_unref(obj);
visit_free(v);
qobject_unref(str);
g_string_free(str, true);
}
static void dump_json_image_info(ImageInfo *info)
{
QString *str;
GString *str;
QObject *obj;
Visitor *v = qobject_output_visitor_new(&obj);
@ -2813,10 +2812,10 @@ static void dump_json_image_info(ImageInfo *info)
visit_complete(v, &obj);
str = qobject_to_json_pretty(obj, true);
assert(str != NULL);
printf("%s\n", qstring_get_str(str));
printf("%s\n", str->str);
qobject_unref(obj);
visit_free(v);
qobject_unref(str);
g_string_free(str, true);
}
static void dump_human_image_info_list(ImageInfoList *list)
@ -5236,7 +5235,7 @@ out:
static void dump_json_block_measure_info(BlockMeasureInfo *info)
{
QString *str;
GString *str;
QObject *obj;
Visitor *v = qobject_output_visitor_new(&obj);
@ -5244,10 +5243,10 @@ static void dump_json_block_measure_info(BlockMeasureInfo *info)
visit_complete(v, &obj);
str = qobject_to_json_pretty(obj, true);
assert(str != NULL);
printf("%s\n", qstring_get_str(str));
printf("%s\n", str->str);
qobject_unref(obj);
visit_free(v);
qobject_unref(str);
g_string_free(str, true);
}
static int img_measure(int argc, char **argv)

22
qga/main.c
View File

@ -22,7 +22,6 @@
#include "qapi/qmp/json-parser.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qjson.h"
#include "qapi/qmp/qstring.h"
#include "guest-agent-core.h"
#include "qga-qapi-init-commands.h"
#include "qapi/qmp/qerror.h"
@ -528,8 +527,7 @@ fail:
static int send_response(GAState *s, const QDict *rsp)
{
const char *buf;
QString *payload_qstr, *response_qstr;
GString *response;
GIOStatus status;
g_assert(s->channel);
@ -538,25 +536,19 @@ static int send_response(GAState *s, const QDict *rsp)
return 0;
}
payload_qstr = qobject_to_json(QOBJECT(rsp));
if (!payload_qstr) {
response = qobject_to_json(QOBJECT(rsp));
if (!response) {
return -EINVAL;
}
if (s->delimit_response) {
s->delimit_response = false;
response_qstr = qstring_new();
qstring_append_chr(response_qstr, QGA_SENTINEL_BYTE);
qstring_append(response_qstr, qstring_get_str(payload_qstr));
qobject_unref(payload_qstr);
} else {
response_qstr = payload_qstr;
g_string_prepend_c(response, QGA_SENTINEL_BYTE);
}
qstring_append_chr(response_qstr, '\n');
buf = qstring_get_str(response_qstr);
status = ga_channel_write_all(s->channel, buf, strlen(buf));
qobject_unref(response_qstr);
g_string_append_c(response, '\n');
status = ga_channel_write_all(s->channel, response->str, response->len);
g_string_free(response, true);
if (status != G_IO_STATUS_NORMAL) {
return -EIO;
}

6
qobject/qjson.c
View File

@ -284,15 +284,15 @@ static void to_json(const QObject *obj, GString *accu, bool pretty, int indent)
}
}
QString *qobject_to_json_pretty(const QObject *obj, bool pretty)
GString *qobject_to_json_pretty(const QObject *obj, bool pretty)
{
GString *accu = g_string_new(NULL);
to_json(obj, accu, pretty, 0);
return qstring_from_gstring(accu);
return accu;
}
QString *qobject_to_json(const QObject *obj)
GString *qobject_to_json(const QObject *obj)
{
return qobject_to_json_pretty(obj, false);
}

4
qom/object_interfaces.c
View File

@ -5,7 +5,6 @@
#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qerror.h"
#include "qapi/qmp/qjson.h"
#include "qapi/qmp/qstring.h"
#include "qapi/qobject-input-visitor.h"
#include "qom/object_interfaces.h"
#include "qemu/help_option.h"
@ -207,7 +206,8 @@ char *object_property_help(const char *name, const char *type,
g_string_append(str, description);
}
if (defval) {
g_autofree char *def_json = qstring_free(qobject_to_json(defval), TRUE);
g_autofree char *def_json = g_string_free(qobject_to_json(defval),
true);
g_string_append_printf(str, " (default: %s)", def_json);
}

7
qom/qom-hmp-cmds.c
View File

@ -13,7 +13,6 @@
#include "qapi/qapi-commands-qom.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qjson.h"
#include "qapi/qmp/qstring.h"
#include "qom/object.h"
void hmp_qom_list(Monitor *mon, const QDict *qdict)
@ -78,9 +77,9 @@ void hmp_qom_get(Monitor *mon, const QDict *qdict)
QObject *obj = qmp_qom_get(path, property, &err);
if (err == NULL) {
QString *str = qobject_to_json_pretty(obj, true);
monitor_printf(mon, "%s\n", qstring_get_str(str));
qobject_unref(str);
GString *str = qobject_to_json_pretty(obj, true);
monitor_printf(mon, "%s\n", str->str);
g_string_free(str, true);
}
qobject_unref(obj);

56
tests/check-qjson.c
View File

@ -35,17 +35,15 @@ static QString *from_json_str(const char *jstr, bool single, Error **errp)
static char *to_json_str(QString *str)
{
QString *json = qobject_to_json(QOBJECT(str));
char *jstr;
GString *json = qobject_to_json(QOBJECT(str));
if (!json) {
return NULL;
}
/* peel off double quotes */
jstr = g_strndup(qstring_get_str(json) + 1,
qstring_get_length(json) - 2);
qobject_unref(json);
return jstr;
g_string_truncate(json, json->len - 1);
g_string_erase(json, 0, 1);
return g_string_free(json, false);
}
static void escaped_string(void)
@ -809,7 +807,7 @@ static void int_number(void)
QNum *qnum;
int64_t ival;
uint64_t uval;
QString *str;
GString *str;
for (i = 0; test_cases[i].encoded; i++) {
qnum = qobject_to(QNum,
@ -828,9 +826,9 @@ static void int_number(void)
(double)test_cases[i].decoded);
str = qobject_to_json(QOBJECT(qnum));
g_assert_cmpstr(qstring_get_str(str), ==,
g_assert_cmpstr(str->str, ==,
test_cases[i].reencoded ?: test_cases[i].encoded);
qobject_unref(str);
g_string_free(str, true);
qobject_unref(qnum);
}
@ -851,7 +849,7 @@ static void uint_number(void)
QNum *qnum;
int64_t ival;
uint64_t uval;
QString *str;
GString *str;
for (i = 0; test_cases[i].encoded; i++) {
qnum = qobject_to(QNum,
@ -865,9 +863,9 @@ static void uint_number(void)
(double)test_cases[i].decoded);
str = qobject_to_json(QOBJECT(qnum));
g_assert_cmpstr(qstring_get_str(str), ==,
g_assert_cmpstr(str->str, ==,
test_cases[i].reencoded ?: test_cases[i].encoded);
qobject_unref(str);
g_string_free(str, true);
qobject_unref(qnum);
}
@ -892,7 +890,7 @@ static void float_number(void)
QNum *qnum;
int64_t ival;
uint64_t uval;
QString *str;
GString *str;
for (i = 0; test_cases[i].encoded; i++) {
qnum = qobject_to(QNum,
@ -904,9 +902,9 @@ static void float_number(void)
g_assert(!qnum_get_try_uint(qnum, &uval));
str = qobject_to_json(QOBJECT(qnum));
g_assert_cmpstr(qstring_get_str(str), ==,
g_assert_cmpstr(str->str, ==,
test_cases[i].reencoded ?: test_cases[i].encoded);
qobject_unref(str);
g_string_free(str, true);
qobject_unref(qnum);
}
@ -917,7 +915,7 @@ static void keyword_literal(void)
QObject *obj;
QBool *qbool;
QNull *null;
QString *str;
GString *str;
obj = qobject_from_json("true", &error_abort);
qbool = qobject_to(QBool, obj);
@ -925,8 +923,8 @@ static void keyword_literal(void)
g_assert(qbool_get_bool(qbool) == true);
str = qobject_to_json(obj);
g_assert(strcmp(qstring_get_str(str), "true") == 0);
qobject_unref(str);
g_assert_cmpstr(str->str, ==, "true");
g_string_free(str, true);
qobject_unref(qbool);
@ -936,8 +934,8 @@ static void keyword_literal(void)
g_assert(qbool_get_bool(qbool) == false);
str = qobject_to_json(obj);
g_assert(strcmp(qstring_get_str(str), "false") == 0);
qobject_unref(str);
g_assert_cmpstr(str->str, ==, "false");
g_string_free(str, true);
qobject_unref(qbool);
@ -1087,7 +1085,7 @@ static void simple_dict(void)
for (i = 0; test_cases[i].encoded; i++) {
QObject *obj;
QString *str;
GString *str;
obj = qobject_from_json(test_cases[i].encoded, &error_abort);
g_assert(qlit_equal_qobject(&test_cases[i].decoded, obj));
@ -1095,10 +1093,10 @@ static void simple_dict(void)
str = qobject_to_json(obj);
qobject_unref(obj);
obj = qobject_from_json(qstring_get_str(str), &error_abort);
obj = qobject_from_json(str->str, &error_abort);
g_assert(qlit_equal_qobject(&test_cases[i].decoded, obj));
qobject_unref(obj);
qobject_unref(str);
g_string_free(str, true);
}
}
@ -1196,7 +1194,7 @@ static void simple_list(void)
for (i = 0; test_cases[i].encoded; i++) {
QObject *obj;
QString *str;
GString *str;
obj = qobject_from_json(test_cases[i].encoded, &error_abort);
g_assert(qlit_equal_qobject(&test_cases[i].decoded, obj));
@ -1204,10 +1202,10 @@ static void simple_list(void)
str = qobject_to_json(obj);
qobject_unref(obj);
obj = qobject_from_json(qstring_get_str(str), &error_abort);
obj = qobject_from_json(str->str, &error_abort);
g_assert(qlit_equal_qobject(&test_cases[i].decoded, obj));
qobject_unref(obj);
qobject_unref(str);
g_string_free(str, true);
}
}
@ -1258,7 +1256,7 @@ static void simple_whitespace(void)
for (i = 0; test_cases[i].encoded; i++) {
QObject *obj;
QString *str;
GString *str;
obj = qobject_from_json(test_cases[i].encoded, &error_abort);
g_assert(qlit_equal_qobject(&test_cases[i].decoded, obj));
@ -1266,11 +1264,11 @@ static void simple_whitespace(void)
str = qobject_to_json(obj);
qobject_unref(obj);
obj = qobject_from_json(qstring_get_str(str), &error_abort);
obj = qobject_from_json(str->str, &error_abort);
g_assert(qlit_equal_qobject(&test_cases[i].decoded, obj));
qobject_unref(obj);
qobject_unref(str);
g_string_free(str, true);
}
}

20
tests/qtest/libqtest.c
View File

@ -652,27 +652,25 @@ void qmp_fd_vsend_fds(int fd, int *fds, size_t fds_num,
/* No need to send anything for an empty QObject. */
if (qobj) {
int log = getenv("QTEST_LOG") != NULL;
QString *qstr = qobject_to_json(qobj);
const char *str;
GString *str = qobject_to_json(qobj);
/*
* BUG: QMP doesn't react to input until it sees a newline, an
* object, or an array. Work-around: give it a newline.
*/
qstring_append_chr(qstr, '\n');
str = qstring_get_str(qstr);
g_string_append_c(str, '\n');
if (log) {
fprintf(stderr, "%s", str);
fprintf(stderr, "%s", str->str);
}
/* Send QMP request */
if (fds && fds_num > 0) {
socket_send_fds(fd, fds, fds_num, str, qstring_get_length(qstr));
socket_send_fds(fd, fds, fds_num, str->str, str->len);
} else {
socket_send(fd, str, qstring_get_length(qstr));
socket_send(fd, str->str, str->len);
}
qobject_unref(qstr);
g_string_free(str, true);
qobject_unref(qobj);
}
}
@ -1197,9 +1195,9 @@ void qtest_qmp_assert_success(QTestState *qts, const char *fmt, ...)
g_assert(response);
if (!qdict_haskey(response, "return")) {
QString *s = qobject_to_json_pretty(QOBJECT(response), true);
g_test_message("%s", qstring_get_str(s));
qobject_unref(s);
GString *s = qobject_to_json_pretty(QOBJECT(response), true);
g_test_message("%s", s->str);
g_string_free(s, true);
}
g_assert(qdict_haskey(response, "return"));
qobject_unref(response);

6
tests/test-visitor-serialization.c
View File

@ -957,15 +957,15 @@ static void qmp_deserialize(void **native_out, void *datap,
VisitorFunc visit, Error **errp)
{
QmpSerializeData *d = datap;
QString *output_json;
GString *output_json;
QObject *obj_orig, *obj;
visit_complete(d->qov, &d->obj);
obj_orig = d->obj;
output_json = qobject_to_json(obj_orig);
obj = qobject_from_json(qstring_get_str(output_json), &error_abort);
obj = qobject_from_json(output_json->str, &error_abort);
qobject_unref(output_json);
g_string_free(output_json, true);
d->qiv = qobject_input_visitor_new(obj);
qobject_unref(obj_orig);
qobject_unref(obj);