+/**
+ * qstring_from_str(): Create a new QString from a regular C string
+ *
+ * Return strong reference.
+ */
+QString *qstring_from_str(const char *str)
+{
+ return qstring_from_substr(str, 0, strlen(str) - 1);
+}
+
+static void capacity_increase(QString *qstring, size_t len)
+{
+ if (qstring->capacity < (qstring->length + len)) {
+ qstring->capacity += len;
+ qstring->capacity *= 2; /* use exponential growth */
+
+ qstring->string = qemu_realloc(qstring->string, qstring->capacity + 1);
+ }
+}
+
+/* qstring_append(): Append a C string to a QString
+ */
+void qstring_append(QString *qstring, const char *str)
+{
+ size_t len = strlen(str);
+
+ capacity_increase(qstring, len);
+ memcpy(qstring->string + qstring->length, str, len);
+ qstring->length += len;
+ qstring->string[qstring->length] = 0;
+}
+
+void qstring_append_int(QString *qstring, int64_t value)
+{
+ char num[32];
+
+ snprintf(num, sizeof(num), "%" PRId64, value);
+ qstring_append(qstring, num);
+}
+
+/**
+ * qstring_append_chr(): Append a C char to a QString
+ */
+void qstring_append_chr(QString *qstring, int c)
+{
+ capacity_increase(qstring, 1);
+ qstring->string[qstring->length++] = c;
+ qstring->string[qstring->length] = 0;
+}
+