+tag_parse_status_t
+parse_tag_command_line (void *ctx, int argc, char **argv,
+ char **query_str, tag_op_list_t *tag_ops)
+{
+ int i;
+
+ for (i = 0; i < argc; i++) {
+ if (strcmp (argv[i], "--") == 0) {
+ i++;
+ break;
+ }
+
+ if (argv[i][0] != '+' && argv[i][0] != '-')
+ break;
+
+ bool is_remove = argv[i][0] == '-';
+ const char *msg;
+
+ msg = illegal_tag (argv[i] + 1, is_remove);
+ if (msg) {
+ fprintf (stderr, "Error: %s\n", msg);
+ return TAG_PARSE_INVALID;
+ }
+
+ tag_op_list_append (tag_ops, argv[i] + 1, is_remove);
+ }
+
+ *query_str = query_string_from_args (ctx, argc - i, &argv[i]);
+
+ if (*query_str == NULL) {
+ fprintf (stderr, "Out of memory.\n");
+ return TAG_PARSE_OUT_OF_MEMORY;
+ }
+
+ return TAG_PARSE_SUCCESS;
+}
+
+