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-rw-r--r--openbsc/src/vty/vector.c186
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diff --git a/openbsc/src/vty/vector.c b/openbsc/src/vty/vector.c
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+/* Generic vector interface routine
+ * Copyright (C) 1997 Kunihiro Ishiguro
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Zebra; see the file COPYING. If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <vty/vector.h>
+#include <memory.h>
+
+/* Initialize vector : allocate memory and return vector. */
+vector vector_init(unsigned int size)
+{
+ vector v = calloc(1, sizeof(struct _vector));
+ if (!v)
+ return NULL;
+
+ /* allocate at least one slot */
+ if (size == 0)
+ size = 1;
+
+ v->alloced = size;
+ v->active = 0;
+ v->index = calloc(1, sizeof(void *) * size);
+ if (!v->index) {
+ free(v);
+ return NULL;
+ }
+ return v;
+}
+
+void vector_only_wrapper_free(vector v)
+{
+ free(v);
+}
+
+void vector_only_index_free(void *index)
+{
+ free(index);
+}
+
+void vector_free(vector v)
+{
+ free(v->index);
+ free(v);
+}
+
+vector vector_copy(vector v)
+{
+ unsigned int size;
+ vector new = calloc(1, sizeof(struct _vector));
+ if (!new)
+ return NULL;
+
+ new->active = v->active;
+ new->alloced = v->alloced;
+
+ size = sizeof(void *) * (v->alloced);
+ new->index = calloc(1, size);
+ if (!new->index) {
+ free(new);
+ return NULL;
+ }
+ memcpy(new->index, v->index, size);
+
+ return new;
+}
+
+/* Check assigned index, and if it runs short double index pointer */
+void vector_ensure(vector v, unsigned int num)
+{
+ if (v->alloced > num)
+ return;
+
+ v->index = realloc(v->index, sizeof(void *) * (v->alloced * 2));
+ memset(&v->index[v->alloced], 0, sizeof(void *) * v->alloced);
+ v->alloced *= 2;
+
+ if (v->alloced <= num)
+ vector_ensure(v, num);
+}
+
+/* This function only returns next empty slot index. It dose not mean
+ the slot's index memory is assigned, please call vector_ensure()
+ after calling this function. */
+int vector_empty_slot(vector v)
+{
+ unsigned int i;
+
+ if (v->active == 0)
+ return 0;
+
+ for (i = 0; i < v->active; i++)
+ if (v->index[i] == 0)
+ return i;
+
+ return i;
+}
+
+/* Set value to the smallest empty slot. */
+int vector_set(vector v, void *val)
+{
+ unsigned int i;
+
+ i = vector_empty_slot(v);
+ vector_ensure(v, i);
+
+ v->index[i] = val;
+
+ if (v->active <= i)
+ v->active = i + 1;
+
+ return i;
+}
+
+/* Set value to specified index slot. */
+int vector_set_index(vector v, unsigned int i, void *val)
+{
+ vector_ensure(v, i);
+
+ v->index[i] = val;
+
+ if (v->active <= i)
+ v->active = i + 1;
+
+ return i;
+}
+
+/* Look up vector. */
+void *vector_lookup(vector v, unsigned int i)
+{
+ if (i >= v->active)
+ return NULL;
+ return v->index[i];
+}
+
+/* Lookup vector, ensure it. */
+void *vector_lookup_ensure(vector v, unsigned int i)
+{
+ vector_ensure(v, i);
+ return v->index[i];
+}
+
+/* Unset value at specified index slot. */
+void vector_unset(vector v, unsigned int i)
+{
+ if (i >= v->alloced)
+ return;
+
+ v->index[i] = NULL;
+
+ if (i + 1 == v->active) {
+ v->active--;
+ while (i && v->index[--i] == NULL && v->active--) ; /* Is this ugly ? */
+ }
+}
+
+/* Count the number of not emplty slot. */
+unsigned int vector_count(vector v)
+{
+ unsigned int i;
+ unsigned count = 0;
+
+ for (i = 0; i < v->active; i++)
+ if (v->index[i] != NULL)
+ count++;
+
+ return count;
+}