1 files changed, 77 insertions, 0 deletions
diff --git a/src/uqm/supermelee/netplay/checkbuf.h b/src/uqm/supermelee/netplay/checkbuf.h
new file mode 100644
index 0000000..f609448
--- /dev/null
+++ b/src/uqm/supermelee/netplay/checkbuf.h
@@ -0,0 +1,77 @@
+/*
+ *  Copyright 2006  Serge van den Boom <svdb@stack.nl>
+ *
+ *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef UQM_SUPERMELEE_NETPLAY_CHECKBUF_H_
+#define UQM_SUPERMELEE_NETPLAY_CHECKBUF_H_
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+typedef struct ChecksumEntry ChecksumEntry;
+typedef struct ChecksumBuffer ChecksumBuffer;
+
+#if defined(__cplusplus)
+}
+#endif
+
+#include "../../battle.h"
+		// for BattleFrameCounter
+#include "checksum.h"
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+
+struct ChecksumEntry {
+#ifdef NETPLAY_DEBUG
+	BattleFrameCounter frameNr;
+			// The number of the frame this checksum originated from.
+			// If the checksumming code is working correctly, the checksum
+			// can only come from one frame, so this value is not needed
+			// for normal operation.
+			// Its only use is to detect some cases where checksumming code
+			// is *not* working correctly.
+#endif
+	Checksum checksum;
+};
+
+struct ChecksumBuffer {
+	ChecksumEntry *checksums;
+			// Cyclic buffer. if 'size' > 0, then 'first' is an index to
+			// the first used entry, 'size' is the number of used
+			// entries in the buffer, and (first + size) % maxSize is the
+			// index to just past the end of the buffer.
+	size_t maxSize;
+
+	size_t interval;
+};
+
+void ChecksumBuffer_init(ChecksumBuffer *cb, size_t delay, size_t interval);
+void ChecksumBuffer_uninit(ChecksumBuffer *cb);
+bool ChecksumBuffer_addChecksum(ChecksumBuffer *cb,
+		BattleFrameCounter frameNr, Checksum checksum);
+bool ChecksumBuffer_getChecksum(ChecksumBuffer *cb,
+		BattleFrameCounter frameNr, Checksum *result);
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif  /* UQM_SUPERMELEE_NETPLAY_CHECKBUF_H_ */