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qobject: Use GString instead of QString to accumulate JSON

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QString supports modifying its string, but it's quite limited: you can
only append.  The remaining callers use it for building an initial
string, never for modifying it later.

Use of GString for building the initial string is actually more
convenient here.  Change qobject_to_json() & friends to do that.

Once all such uses are replaced this way, QString can become immutable.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20201211171152.146877-5-armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2020-12-11 18:11:36 +01:00
parent 6589f45991
commit f1cc129df8
3 changed files with 58 additions and 47 deletions
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include/qapi/qmp/qstring.h
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@ -25,6 +25,7 @@ struct QString {
QString *qstring_new(void);
QString *qstring_from_str(const char *str);
QString *qstring_from_substr(const char *str, size_t start, size_t end);
QString *qstring_from_gstring(GString *gstr);
size_t qstring_get_length(const QString *qstring);
const char *qstring_get_str(const QString *qstring);
const char *qstring_get_try_str(const QString *qstring);