From c4c19c74b8c7208bff29048b1a0d35b06accd8ac Mon Sep 17 00:00:00 2001
From: Yann Collet <cyan@fb.com>
Date: Tue, 25 Sep 2018 14:43:19 -0700
Subject: changed LZ4_streamDecode member order

to reduce memory usage on 128-bits systems
---
 doc/lz4_manual.html | 20 ++++++++++----------
 lib/lz4.h           |  2 +-
 2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/doc/lz4_manual.html b/doc/lz4_manual.html
index 39a48f3..5e04263 100644
--- a/doc/lz4_manual.html
+++ b/doc/lz4_manual.html
@@ -16,7 +16,7 @@
 <li><a href="#Chapter6">Streaming Compression Functions</a></li>
 <li><a href="#Chapter7">Streaming Decompression Functions</a></li>
 <li><a href="#Chapter8">Unstable declarations</a></li>
-<li><a href="#Chapter9">Private definitions</a></li>
+<li><a href="#Chapter9">PRIVATE DEFINITIONS</a></li>
 <li><a href="#Chapter10">Obsolete Functions</a></li>
 </ol>
 <hr>
@@ -375,7 +375,7 @@ int LZ4_decompress_fast_usingDict (const char* src, char* dst, int originalSize,
  
 </p></pre><BR>
 
-<a name="Chapter9"></a><h2>Private definitions</h2><pre>
+<a name="Chapter9"></a><h2>PRIVATE DEFINITIONS</h2><pre>
  Do not use these definitions directly.
  They are only exposed to allow static allocation of `LZ4_stream_t` and `LZ4_streamDecode_t`.
  Accessing members will expose code to API and/or ABI break in future versions of the library.
@@ -390,12 +390,12 @@ int LZ4_decompress_fast_usingDict (const char* src, char* dst, int originalSize,
 </b></pre><BR>
 <pre><b>typedef struct {
     const unsigned char* externalDict;
-    size_t extDictSize;
     const unsigned char* prefixEnd;
+    size_t extDictSize;
     size_t prefixSize;
 } LZ4_streamDecode_t_internal;
 </b></pre><BR>
-<pre><b>#define LZ4_STREAMSIZE_U64 ((1 << (LZ4_MEMORY_USAGE-3)) + 4)
+<pre><b>#define LZ4_STREAMSIZE_U64 ((1 << (LZ4_MEMORY_USAGE-3)) + 4 + ((sizeof(void*)==16) ? 4 : 0) </b>/*AS-400*/ )<b>
 #define LZ4_STREAMSIZE     (LZ4_STREAMSIZE_U64 * sizeof(unsigned long long))
 union LZ4_stream_u {
     unsigned long long table[LZ4_STREAMSIZE_U64];
@@ -409,7 +409,7 @@ union LZ4_stream_u {
  
 </p></pre><BR>
 
-<pre><b>#define LZ4_STREAMDECODESIZE_U64  4
+<pre><b>#define LZ4_STREAMDECODESIZE_U64 (4 + ((sizeof(void*)==16) ? 2 : 0) </b>/*AS-400*/ )<b>
 #define LZ4_STREAMDECODESIZE     (LZ4_STREAMDECODESIZE_U64 * sizeof(unsigned long long))
 union LZ4_streamDecode_u {
     unsigned long long table[LZ4_STREAMDECODESIZE_U64];
@@ -442,11 +442,11 @@ union LZ4_streamDecode_u {
 #    define LZ4_DEPRECATED(message)
 #  endif
 #endif </b>/* LZ4_DISABLE_DEPRECATE_WARNINGS */<b>
-</b><p>   Should deprecation warnings be a problem,
-   it is generally possible to disable them,
-   typically with -Wno-deprecated-declarations for gcc
-   or _CRT_SECURE_NO_WARNINGS in Visual.
-   Otherwise, it's also possible to define LZ4_DISABLE_DEPRECATE_WARNINGS 
+</b><p>  Should deprecation warnings be a problem,
+  it is generally possible to disable them,
+  typically with -Wno-deprecated-declarations for gcc
+  or _CRT_SECURE_NO_WARNINGS in Visual.
+  Otherwise, it's also possible to define LZ4_DISABLE_DEPRECATE_WARNINGS 
 </p></pre><BR>
 
 </html>
diff --git a/lib/lz4.h b/lib/lz4.h
index 639797a..4d30857 100644
--- a/lib/lz4.h
+++ b/lib/lz4.h
@@ -535,8 +535,8 @@ struct LZ4_stream_t_internal {
 
 typedef struct {
     const unsigned char* externalDict;
-    size_t extDictSize;
     const unsigned char* prefixEnd;
+    size_t extDictSize;
     size_t prefixSize;
 } LZ4_streamDecode_t_internal;
 
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