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-rw-r--r--modules/brotli/enc/cluster.h48
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diff --git a/modules/brotli/enc/cluster.h b/modules/brotli/enc/cluster.h
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+/* Copyright 2013 Google Inc. All Rights Reserved.
+
+ Distributed under MIT license.
+ See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
+*/
+
+/* Functions for clustering similar histograms together. */
+
+#ifndef BROTLI_ENC_CLUSTER_H_
+#define BROTLI_ENC_CLUSTER_H_
+
+#include "../common/platform.h"
+#include <brotli/types.h>
+#include "./histogram.h"
+#include "./memory.h"
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+typedef struct HistogramPair {
+ uint32_t idx1;
+ uint32_t idx2;
+ double cost_combo;
+ double cost_diff;
+} HistogramPair;
+
+#define CODE(X) /* Declaration */;
+
+#define FN(X) X ## Literal
+#include "./cluster_inc.h" /* NOLINT(build/include) */
+#undef FN
+
+#define FN(X) X ## Command
+#include "./cluster_inc.h" /* NOLINT(build/include) */
+#undef FN
+
+#define FN(X) X ## Distance
+#include "./cluster_inc.h" /* NOLINT(build/include) */
+#undef FN
+
+#undef CODE
+
+#if defined(__cplusplus) || defined(c_plusplus)
+} /* extern "C" */
+#endif
+
+#endif /* BROTLI_ENC_CLUSTER_H_ */