Add support for lz4 read filter.

TODO: detecting liblz4 library by CMake.

1 files changed, 45 insertions, 0 deletions

diff --git a/libarchive/archive_xxhash.h b/libarchive/archive_xxhash.h
new file mode 100644
index 00000000..fef19a70
--- /dev/null
+++ b/libarchive/archive_xxhash.h
@@ -0,0 +1,45 @@
+/*-
+ * Copyright (c) 2014 Michihiro NAKAJIMA
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef __LIBARCHIVE_BUILD
+#error This header is only to be used internally to libarchive.
+#endif
+
+#ifndef ARCHIVE_XXHASH_H
+#define ARCHIVE_XXHASH_H
+
+typedef enum { XXH_OK=0, XXH_ERROR } XXH_errorcode;
+
+struct archive_xxhash {
+	unsigned int  (*XXH32)(const void* input, int len, unsigned int seed);
+	void*         (*XXH32_init)(unsigned int seed);
+	XXH_errorcode (*XXH32_update)(void* state, const void* input, int len);
+	unsigned int  (*XXH32_digest)(void* state);
+};
+
+extern const struct archive_xxhash __archive_xxhash;
+
+#endif