--- /dev/null
+/*
+ * filter.c
+ *
+ * LTTng filter bytecode utilities.
+ *
+ * Copyright 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License, version 2.1 only,
+ * as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "filter.h"
+#include <stddef.h>
+
+struct bytecode_symbol_iterator {
+ /* No ownership of bytecode is taken. */
+ char *bytecode;
+ size_t offset, len;
+};
+
+struct bytecode_symbol_iterator *bytecode_symbol_iterator_create(
+ struct lttng_filter_bytecode *bytecode)
+{
+ struct bytecode_symbol_iterator *it = NULL;
+
+ if (!bytecode) {
+ goto end;
+ }
+
+ it = zmalloc(sizeof(*it));
+ if (!it) {
+ goto end;
+ }
+
+ it->bytecode = bytecode->data;
+ it->offset = bytecode->reloc_table_offset;
+ it->len = bytecode->len;
+end:
+ return it;
+}
+
+int bytecode_symbol_iterator_next(struct bytecode_symbol_iterator *it)
+{
+ int ret;
+ size_t len;
+
+ if (!it || it->offset >= it->len) {
+ ret = -1;
+ goto end;
+ }
+
+ len = strlen(it->bytecode + it->offset + sizeof(uint16_t)) + 1;
+ it->offset += len + sizeof(uint16_t);
+ ret = it->offset >= it->len ? -1 : 0;
+end:
+ return ret;
+}
+
+int bytecode_symbol_iterator_get_type(struct bytecode_symbol_iterator *it)
+{
+ int ret;
+
+ if (!it) {
+ ret = -1;
+ goto end;
+ }
+
+ ret = *((uint16_t *) (it->bytecode + it->offset));
+end:
+ return ret;
+ }
+
+const char *bytecode_symbol_iterator_get_name(
+ struct bytecode_symbol_iterator *it)
+{
+ const char *ret = NULL;
+
+ if (!it) {
+ goto end;
+ }
+
+ ret = it->bytecode + it->offset + sizeof(uint16_t);
+end:
+ return ret;
+}
+
+void bytecode_symbol_iterator_destroy(struct bytecode_symbol_iterator *it)
+{
+ free(it);
+}