qobject: Drop qstring_get_try_str()

No users left outside tests/, and the ones in tests/ can just as well
use qstring_get_str().  Do that, and drop the function.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20201211171152.146877-14-armbru@redhat.com>

include/qapi/qmp/qstring.h

@@ -28,7 +28,6 @@ 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);
 void qstring_append_int(QString *qstring, int64_t value);
 void qstring_append(QString *qstring, const char *str);
 void qstring_append_chr(QString *qstring, int c);

qobject/qstring.c

@@ -139,16 +139,6 @@ const char *qstring_get_str(const QString *qstring)
     return qstring->string;
 }
 
-/**
- * qstring_get_try_str(): Return a pointer to the stored string
- *
- * NOTE: will return NULL if qstring is not provided.
- */
-const char *qstring_get_try_str(const QString *qstring)
-{
-    return qstring ? qstring_get_str(qstring) : NULL;
-}
-
 /**
  * qstring_is_equal(): Test whether the two QStrings are equal
  */

tests/check-qjson.c

@@ -89,7 +89,7 @@ static void escaped_string(void)
         for (j = 0; j < 2; j++) {
             if (test_cases[i].utf8_out) {
                 cstr = from_json_str(test_cases[i].json_in, j, &error_abort);
-                g_assert_cmpstr(qstring_get_try_str(cstr),
+                g_assert_cmpstr(qstring_get_str(cstr),
                                 ==, test_cases[i].utf8_out);
                 if (!test_cases[i].skip) {
                     jstr = to_json_str(cstr);
@@ -751,7 +751,7 @@ static void utf8_string(void)
             /* Parse @json_in, expect @utf8_out */
             if (utf8_out) {
                 str = from_json_str(json_in, j, &error_abort);
-                g_assert_cmpstr(qstring_get_try_str(str), ==, utf8_out);
+                g_assert_cmpstr(qstring_get_str(str), ==, utf8_out);
                 qobject_unref(str);
             } else {
                 str = from_json_str(json_in, j, NULL);
@@ -782,7 +782,7 @@ static void utf8_string(void)
             /* Parse @json_out right back, unless it has replacements */
             if (!strstr(json_out, "\\uFFFD")) {
                 str = from_json_str(json_out, j, &error_abort);
-                g_assert_cmpstr(qstring_get_try_str(str), ==, utf8_in);
+                g_assert_cmpstr(qstring_get_str(str), ==, utf8_in);
                 qobject_unref(str);
             }
         }
@@ -1021,9 +1021,8 @@ static void interpolation_valid(void)
 
     /* string */
 
-    qstr = qobject_to(QString,
-                     qobject_from_jsonf_nofail("%s", value_s));
-    g_assert_cmpstr(qstring_get_try_str(qstr), ==, value_s);
+    qstr = qobject_to(QString, qobject_from_jsonf_nofail("%s", value_s));
+    g_assert_cmpstr(qstring_get_str(qstr), ==, value_s);
     qobject_unref(qstr);
 
     /* object */