+static void
+string_append_double (GString *string,
+ double d)
+{
+ char buf[G_ASCII_DTOSTR_BUF_SIZE];
+
+ g_ascii_dtostr (buf, sizeof (buf), d);
+ g_string_append (string, buf);
+}
+
+static void
+string_append_string (GString *str,
+ const char *string)
+{
+ gsize len;
+
+ g_string_append_c (str, '"');
+
+ do {
+ len = strcspn (string, "\"\n\r\f");
+ g_string_append (str, string);
+ string += len;
+ switch (*string)
+ {
+ case '\0':
+ break;
+ case '\n':
+ g_string_append (str, "\\A ");
+ break;
+ case '\r':
+ g_string_append (str, "\\D ");
+ break;
+ case '\f':
+ g_string_append (str, "\\C ");
+ break;
+ case '\"':
+ g_string_append (str, "\\\"");
+ break;
+ default:
+ g_assert_not_reached ();
+ break;
+ }
+ } while (*string);
+
+ g_string_append_c (str, '"');
+}
+