Merging upstream version 0.7.

Signed-off-by: Daniel Baumann <daniel@debian.org>

README

@@ -18,7 +18,7 @@ masked by a low compression ratio in the last members.
 
 The xlunzip tarball contains a copy of the lzip_decompress module and can be
 compiled and tested without downloading or applying the patch to the kernel.
- 
+
 My lzip patch for linux can be found at
 http://download.savannah.gnu.org/releases/lzip/kernel/
 
@@ -61,8 +61,8 @@ data is uncompressible. The worst case is very compressible data followed by
 uncompressible data because in this case the output pointer increases faster
 when the input pointer is smaller.
 
-        |                        *   <-- input pointer
-        |                    *   ,   <-- output pointer
+        |                        *   <-- input pointer (*)
+        |                    *   ,   <-- output pointer (,)
         |                * ,  '
         |            x  '            <-- overrun (x)
 memory  |        * ,'
@@ -71,7 +71,7 @@ address |    *   ,'
         |    ,'
         |  ,'
         |,'
-        `--------------------------
+        '--------------------------
                     time
 
 All we need to know to calculate the minimum required extra space is:
@@ -82,19 +82,23 @@ All we need to know to calculate the minimum required extra space is:
 The maximum expansion ratio of LZMA data is of about 1.4%. Rounding this up
 to 1/64 (1.5625%) and adding 36 bytes per input member, the extra space
 required to decompress lzip data in place is:
+
   extra_bytes = ( compressed_size >> 6 ) + members * 36
 
-Using the compressed size to calculate the extra_bytes (as in the equation
+Using the compressed size to calculate the extra_bytes (as in the formula
 above) may slightly overestimate the amount of space required in the worst
 case. But calculating the extra_bytes from the uncompressed size (as does
-linux) is wrong (and inefficient for high compression ratios). The formula
-used in arch/x86/boot/header.S
-  extra_bytes = (uncompressed_size >> 8) + 65536
-fails with 1 MB of zeros followed by 8 MB of random data, and wastes memory
-for compression ratios > 4:1.
+linux currently) is wrong (and inefficient for high compression ratios). The
+formula used in arch/x86/boot/header.S
+
+  extra_bytes = ( uncompressed_size >> 8 ) + 65536
+
+fails to decompress 1 MB of zeros followed by 8 MB of random data, wastes
+memory for compression ratios larger than 4:1, and does not even consider
+multimember data.
 
 
-Copyright (C) 2016-2020 Antonio Diaz Diaz.
+Copyright (C) 2016-2021 Antonio Diaz Diaz.
 
 This file is free documentation: you have unlimited permission to copy,
 distribute, and modify it.