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@@ -0,0 +1,24 @@
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+/* SPDX-License-Identifier: GPL-2.0+ */
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+/*
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+ * Copyright 2019 Google LLC
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+ */
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+
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+#ifndef __LZ4_H
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+#define __LZ4_H
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+
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+/**
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+ * ulz4fn() - Decompress LZ4 data
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+ *
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+ * @src: Source data to decompress
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+ * @srcn: Length of source data
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+ * @dst: Destination for uncompressed data
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+ * @dstn: Returns length of uncompressed data
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+ * @return 0 if OK, -EPROTONOSUPPORT if the magic number or version number are
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+ * not recognised or independent blocks are used, -EINVAL if the reserved
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+ * fields are non-zero, or input is overrun, -EENOBUFS if the destination
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+ * buffer is overrun, -EEPROTO if the compressed data causes an error in
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+ * the decompression algorithm
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+ */
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+int ulz4fn(const void *src, size_t srcn, void *dst, size_t *dstn);
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+
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+#endif
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