1 files changed, 70 insertions, 0 deletions
diff --git a/hicn-light/src/hicn/base/vector.h b/hicn-light/src/hicn/base/vector.h
new file mode 100644
index 000000000..9b99ba813
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+++ b/hicn-light/src/hicn/base/vector.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2020 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * \file vector.h
+ * \brief Resizeable static array
+ */
+
+#ifndef UTIL_VECTOR_H
+#define UTIL_VECTOR_H
+
+#include <stddef.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#include "common.h"
+
+/** Local variable naming macro. */
+#define _vector_var(v) _vector_##v
+
+typedef struct {
+    size_t num_elts;
+    size_t max_elts;
+} vector_hdr_t;
+
+void _vector_init(void ** vector_ptr, size_t elt_size, size_t max_elts);
+void _vector_free(void ** vector_ptr);
+void _vector_resize(void ** vector_ptr, size_t elt_size, off_t pos);
+
+/* Make sure elements following the header are aligned */
+#define VECTOR_HDRLEN SIZEOF_ALIGNED(vector_hdr_t)
+
+/* This header actually prepends the actual content of the vector */
+#define vector_hdr(vector) ((vector_hdr_t *)((uint8_t*)vector - VECTOR_HDRLEN))
+
+#define vector_init(vector, max_elts) \
+    _vector_init((void**)&vector, sizeof(vector[0]), max_elts)
+
+#define vector_free(vector) \
+    _vector_free(&vector)
+
+#define vector_len(vector) (vector_hdr(vector)->num_elts)
+
+#define vector_resize(vector) _vector_resize((void**)&(vector), sizeof((vector)[0]), 0)
+
+#define vector_ensure_pos(vector, pos)                                          \
+do {                                                                            \
+    if ((pos) >= vector_len(vector))                                            \
+        _vector_resize((void**)&(vector), sizeof((vector)[0]), pos);            \
+} while(0)
+
+#define vector_push(vector, elt)                                                \
+do {                                                                            \
+    vector_ensure_pos(vector_len(vector));                                      \
+    vector[vector_len(vector)++] = elt;                                         \
+} while(0)
+
+#endif /* UTIL_VECTOR_H */