Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / fs / zfs / zfs_lzjb.c

diff --git a/qemu/roms/u-boot/fs/zfs/zfs_lzjb.c b/qemu/roms/u-boot/fs/zfs/zfs_lzjb.c
new file mode 100644 (file)
index 0000000..607dfbb
--- /dev/null
+++ b/qemu/roms/u-boot/fs/zfs/zfs_lzjb.c
@@ -0,0 +1,85 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <linux/stat.h>
+#include <linux/time.h>
+#include <linux/ctype.h>
+#include <asm/byteorder.h>
+#include "zfs_common.h"
+
+#include <zfs/zfs.h>
+#include <zfs/zio.h>
+#include <zfs/dnode.h>
+#include <zfs/uberblock_impl.h>
+#include <zfs/vdev_impl.h>
+#include <zfs/zio_checksum.h>
+#include <zfs/zap_impl.h>
+#include <zfs/zap_leaf.h>
+#include <zfs/zfs_znode.h>
+#include <zfs/dmu.h>
+#include <zfs/dmu_objset.h>
+#include <zfs/dsl_dir.h>
+#include <zfs/dsl_dataset.h>
+
+#define        MATCH_BITS      6
+#define        MATCH_MIN       3
+#define        OFFSET_MASK     ((1 << (16 - MATCH_BITS)) - 1)
+
+/*
+ * Decompression Entry - lzjb
+ */
+#ifndef        NBBY
+#define        NBBY    8
+#endif
+
+int
+lzjb_decompress(void *s_start, void *d_start, uint32_t s_len,
+                               uint32_t d_len)
+{
+       uint8_t *src = s_start;
+       uint8_t *dst = d_start;
+       uint8_t *d_end = (uint8_t *) d_start + d_len;
+       uint8_t *s_end = (uint8_t *) s_start + s_len;
+       uint8_t *cpy, copymap = 0;
+       int copymask = 1 << (NBBY - 1);
+
+       while (dst < d_end && src < s_end) {
+               if ((copymask <<= 1) == (1 << NBBY)) {
+                       copymask = 1;
+                       copymap = *src++;
+               }
+               if (src >= s_end) {
+                       printf("lzjb decompression failed\n");
+                       return ZFS_ERR_BAD_FS;
+               }
+               if (copymap & copymask) {
+                       int mlen = (src[0] >> (NBBY - MATCH_BITS)) + MATCH_MIN;
+                       int offset = ((src[0] << NBBY) | src[1]) & OFFSET_MASK;
+                       src += 2;
+                       cpy = dst - offset;
+                       if (src > s_end || cpy < (uint8_t *) d_start) {
+                               printf("lzjb decompression failed\n");
+                               return ZFS_ERR_BAD_FS;
+                       }
+                       while (--mlen >= 0 && dst < d_end)
+                               *dst++ = *cpy++;
+               } else {
+                       *dst++ = *src++;
+               }
+       }
+       if (dst < d_end) {
+               printf("lzjb decompression failed\n");
+               return ZFS_ERR_BAD_FS;
+       }
+       return ZFS_ERR_NONE;
+}