Index: head/sys/cddl/boot/zfs/lz4.c
===================================================================
--- head/sys/cddl/boot/zfs/lz4.c	(revision 354253)
+++ head/sys/cddl/boot/zfs/lz4.c	(nonexistent)
@@ -1,329 +0,0 @@
-/*
- * LZ4 - Fast LZ compression algorithm
- * Header File
- * Copyright (C) 2011-2013, Yann Collet.
- * BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * 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 COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "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 COPYRIGHT
- * OWNER OR CONTRIBUTORS 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.
- *
- * You can contact the author at :
- * - LZ4 homepage : http://fastcompression.blogspot.com/p/lz4.html
- * - LZ4 source repository : http://code.google.com/p/lz4/
- *
- * $FreeBSD$
- */
-
-#include <netinet/in.h>
-
-static int LZ4_uncompress_unknownOutputSize(const char *source, char *dest,
-					    int isize, int maxOutputSize);
-
-/* ARGSUSED */
-static int
-lz4_decompress(void *s_start, void *d_start, size_t s_len, size_t d_len, int dummy __unused)
-{
-	const uint8_t *src = s_start;
-	uint32_t bufsiz = htonl(*(uint32_t *)src);
-
-	/* invalid compressed buffer size encoded at start */
-	if (bufsiz + 4 > s_len)
-		return (1);
-
-	/*
-	 * Returns 0 on success (decompression function returned non-negative)
-	 * and non-zero on failure (decompression function returned negative).
-	 */
-	return (LZ4_uncompress_unknownOutputSize((const char *)s_start + 4, d_start, bufsiz,
-	    d_len) < 0);
-}
-
-/*
- * CPU Feature Detection
- */
-
-/* 32 or 64 bits ? */
-#if (defined(__x86_64__) || defined(__x86_64) || defined(__amd64__) || \
-	defined(__amd64) || defined(__ppc64__) || defined(_WIN64) || \
-	defined(__LP64__) || defined(_LP64))
-#define	LZ4_ARCH64	1
-#else
-#define	LZ4_ARCH64	0
-#endif
-
-/*
- * Little Endian or Big Endian?
- * Note: overwrite the below #define if you know your architecture endianess.
- */
-#if BYTE_ORDER == BIG_ENDIAN
-#define	LZ4_BIG_ENDIAN	1
-#else
-	/*
-	 * Little Endian assumed. PDP Endian and other very rare endian format
-	 * are unsupported.
-	 */
-#endif
-
-/*
- * Unaligned memory access is automatically enabled for "common" CPU,
- * such as x86. For others CPU, the compiler will be more cautious, and
- * insert extra code to ensure aligned access is respected. If you know
- * your target CPU supports unaligned memory access, you may want to
- * force this option manually to improve performance
- */
-#if defined(__ARM_FEATURE_UNALIGNED)
-#define	LZ4_FORCE_UNALIGNED_ACCESS 1
-#endif
-
-/*
- * Compiler Options
- */
-#if __STDC_VERSION__ >= 199901L	/* C99 */
-/* "restrict" is a known keyword */
-#else
-/* Disable restrict */
-#define	restrict
-#endif
-
-#define	GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
-
-#define	lz4_bswap16(x) ((unsigned short int) ((((x) >> 8) & 0xffu) \
-	| (((x) & 0xffu) << 8)))
-
-#if (GCC_VERSION >= 302) || (__INTEL_COMPILER >= 800) || defined(__clang__)
-#define	expect(expr, value)    (__builtin_expect((expr), (value)))
-#else
-#define	expect(expr, value)    (expr)
-#endif
-
-#define	likely(expr)	expect((expr) != 0, 1)
-#define	unlikely(expr)	expect((expr) != 0, 0)
-
-/* Basic types */
-#define	BYTE	uint8_t
-#define	U16	uint16_t
-#define	U32	uint32_t
-#define	S32	int32_t
-#define	U64	uint64_t
-
-#ifndef LZ4_FORCE_UNALIGNED_ACCESS
-#pragma pack(1)
-#endif
-
-typedef struct _U16_S {
-	U16 v;
-} U16_S;
-typedef struct _U32_S {
-	U32 v;
-} U32_S;
-typedef struct _U64_S {
-	U64 v;
-} U64_S;
-
-#ifndef LZ4_FORCE_UNALIGNED_ACCESS
-#pragma pack()
-#endif
-
-#define	A64(x)	(((U64_S *)(x))->v)
-#define	A32(x)	(((U32_S *)(x))->v)
-#define	A16(x)	(((U16_S *)(x))->v)
-
-/*
- * Constants
- */
-#define	MINMATCH 4
-
-#define	COPYLENGTH 8
-#define	LASTLITERALS 5
-
-#define	ML_BITS 4
-#define	ML_MASK ((1U<<ML_BITS)-1)
-#define	RUN_BITS (8-ML_BITS)
-#define	RUN_MASK ((1U<<RUN_BITS)-1)
-
-/*
- * Architecture-specific macros
- */
-#if LZ4_ARCH64
-#define	STEPSIZE 8
-#define	UARCH U64
-#define	AARCH A64
-#define	LZ4_COPYSTEP(s, d)	A64(d) = A64(s); d += 8; s += 8;
-#define	LZ4_COPYPACKET(s, d)	LZ4_COPYSTEP(s, d)
-#define	LZ4_SECURECOPY(s, d, e)	if (d < e) LZ4_WILDCOPY(s, d, e)
-#define	HTYPE U32
-#define	INITBASE(base)		const BYTE* const base = ip
-#else
-#define	STEPSIZE 4
-#define	UARCH U32
-#define	AARCH A32
-#define	LZ4_COPYSTEP(s, d)	A32(d) = A32(s); d += 4; s += 4;
-#define	LZ4_COPYPACKET(s, d)	LZ4_COPYSTEP(s, d); LZ4_COPYSTEP(s, d);
-#define	LZ4_SECURECOPY		LZ4_WILDCOPY
-#define	HTYPE const BYTE*
-#define	INITBASE(base)		const int base = 0
-#endif
-
-#if (defined(LZ4_BIG_ENDIAN) && !defined(BIG_ENDIAN_NATIVE_BUT_INCOMPATIBLE))
-#define	LZ4_READ_LITTLEENDIAN_16(d, s, p) \
-	{ U16 v = A16(p); v = lz4_bswap16(v); d = (s) - v; }
-#define	LZ4_WRITE_LITTLEENDIAN_16(p, i) \
-	{ U16 v = (U16)(i); v = lz4_bswap16(v); A16(p) = v; p += 2; }
-#else
-#define	LZ4_READ_LITTLEENDIAN_16(d, s, p) { d = (s) - A16(p); }
-#define	LZ4_WRITE_LITTLEENDIAN_16(p, v)  { A16(p) = v; p += 2; }
-#endif
-
-/* Macros */
-#define	LZ4_WILDCOPY(s, d, e) do { LZ4_COPYPACKET(s, d) } while (d < e);
-
-/* Decompression functions */
-
-static int
-LZ4_uncompress_unknownOutputSize(const char *source,
-    char *dest, int isize, int maxOutputSize)
-{
-	/* Local Variables */
-	const BYTE *restrict ip = (const BYTE *) source;
-	const BYTE *const iend = ip + isize;
-	const BYTE *restrict ref;
-
-	BYTE *restrict op = (BYTE *) dest;
-	BYTE *const oend = op + maxOutputSize;
-	BYTE *cpy;
-
-	size_t dec[] = { 0, 3, 2, 3, 0, 0, 0, 0 };
-
-	/* Main Loop */
-	while (ip < iend) {
-		BYTE token;
-		int length;
-
-		/* get runlength */
-		token = *ip++;
-		if ((length = (token >> ML_BITS)) == RUN_MASK) {
-			int s = 255;
-			while ((ip < iend) && (s == 255)) {
-				s = *ip++;
-				length += s;
-			}
-		}
-		/* copy literals */
-		cpy = op + length;
-		if ((cpy > oend - COPYLENGTH) ||
-		    (ip + length > iend - COPYLENGTH)) {
-			if (cpy > oend)
-				/*
-				 * Error: request to write beyond destination
-				 * buffer.
-				 */
-				goto _output_error;
-			if (ip + length > iend)
-				/*
-				 * Error : request to read beyond source
-				 * buffer.
-				 */
-				goto _output_error;
-			memcpy(op, ip, length);
-			op += length;
-			ip += length;
-			if (ip < iend)
-				/* Error : LZ4 format violation */
-				goto _output_error;
-			/* Necessarily EOF, due to parsing restrictions. */
-			break;
-		}
-		LZ4_WILDCOPY(ip, op, cpy);
-		ip -= (op - cpy);
-		op = cpy;
-
-		/* get offset */
-		LZ4_READ_LITTLEENDIAN_16(ref, cpy, ip);
-		ip += 2;
-		if (ref < (BYTE * const) dest)
-			/*
-			 * Error: offset creates reference outside of
-			 * destination buffer.
-			 */
-			goto _output_error;
-
-		/* get matchlength */
-		if ((length = (token & ML_MASK)) == ML_MASK) {
-			while (ip < iend) {
-				int s = *ip++;
-				length += s;
-				if (s == 255)
-					continue;
-				break;
-			}
-		}
-		/* copy repeated sequence */
-		if unlikely(op - ref < STEPSIZE) {
-#if LZ4_ARCH64
-			size_t dec2table[] = { 0, 0, 0, -1, 0, 1, 2, 3 };
-			size_t dec2 = dec2table[op - ref];
-#else
-			const int dec2 = 0;
-#endif
-			*op++ = *ref++;
-			*op++ = *ref++;
-			*op++ = *ref++;
-			*op++ = *ref++;
-			ref -= dec[op - ref];
-			A32(op) = A32(ref);
-			op += STEPSIZE - 4;
-			ref -= dec2;
-		} else {
-			LZ4_COPYSTEP(ref, op);
-		}
-		cpy = op + length - (STEPSIZE - 4);
-		if (cpy > oend - COPYLENGTH) {
-			if (cpy > oend)
-				/*
-				 * Error: request to write outside of
-				 * destination buffer.
-				 */
-				goto _output_error;
-			LZ4_SECURECOPY(ref, op, (oend - COPYLENGTH));
-			while (op < cpy)
-				*op++ = *ref++;
-			op = cpy;
-			if (op == oend)
-				/*
-				 * Check EOF (should never happen, since last
-				 * 5 bytes are supposed to be literals).
-				 */
-				break;
-			continue;
-		}
-		LZ4_SECURECOPY(ref, op, cpy);
-		op = cpy;	/* correction */
-	}
-
-	/* end of decoding */
-	return (int)(((char *)op) - dest);
-
-	/* write overflow error detected */
-	_output_error:
-	return (int)(-(((char *)ip) - source));
-}

Property changes on: head/sys/cddl/boot/zfs/lz4.c
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