1 files changed, 81 insertions, 0 deletions
diff --git a/source/blender/blenlib/intern/buffer.c b/source/blender/blenlib/intern/buffer.c
new file mode 100644
index 00000000000..b2280b9a0d1
--- /dev/null
+++ b/source/blender/blenlib/intern/buffer.c
@@ -0,0 +1,81 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * This program 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
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#include "MEM_guardedalloc.h"
+
+#include "BLI_buffer.h"
+#include "BLI_utildefines.h"
+
+#include <string.h>
+
+static void *buffer_alloc(BLI_Buffer *buffer, int len)
+{
+	return ((buffer->flag & BLI_BUFFER_USE_CALLOC) ?
+	        MEM_callocN : MEM_mallocN)
+	        (buffer->elem_size * len, "BLI_Buffer.data");
+}
+
+static void *buffer_realloc(BLI_Buffer *buffer, int len)
+{
+	return ((buffer->flag & BLI_BUFFER_USE_CALLOC) ?
+	        MEM_recallocN : MEM_reallocN)
+	        (buffer->data, (buffer->elem_size * len));
+}
+
+void BLI_buffer_resize(BLI_Buffer *buffer, int new_count)
+{
+	if (new_count > buffer->alloc_count) {
+		if (buffer->flag & BLI_BUFFER_USE_STATIC) {
+			void *orig = buffer->data;
+
+			buffer->data = buffer_alloc(buffer, new_count);
+			memcpy(buffer->data, orig, buffer->elem_size * buffer->count);
+			buffer->alloc_count = new_count;
+			buffer->flag &= ~BLI_BUFFER_USE_STATIC;
+		}
+		else {
+			if (buffer->alloc_count && (new_count < buffer->alloc_count * 2)) {
+				buffer->alloc_count *= 2;
+			}
+			else {
+				buffer->alloc_count = new_count;
+			}
+
+			if (buffer->data) {
+				buffer->data = buffer_realloc(buffer, buffer->alloc_count);
+			}
+			else {
+				buffer->data = buffer_alloc(buffer, buffer->alloc_count);
+			}
+		}
+	}
+
+	buffer->count = new_count;
+}
+
+void BLI_buffer_free(BLI_Buffer *buffer)
+{
+	if ((buffer->flag & BLI_BUFFER_USE_STATIC) == 0) {
+		if (buffer->data) {
+			MEM_freeN(buffer->data);
+		}
+	}
+	memset(buffer, 0, sizeof(*buffer));
+}