Merge branch 'dev' into customMem

2 files changed, 7 insertions, 4 deletions

diff --git a/lib/lz4.c b/lib/lz4.c
index a8cc420..128e7b2 100644
--- a/lib/lz4.c
+++ b/lib/lz4.c
@@ -1619,7 +1619,7 @@ int LZ4_compress_fast_continue (LZ4_stream_t* LZ4_stream,
                  * cost to copy the dictionary's tables into the active context,
                  * so that the compression loop is only looking into one table.
                  */
-                LZ4_memcpy(streamPtr, streamPtr->dictCtx, sizeof(LZ4_stream_t));
+                LZ4_memcpy(streamPtr, streamPtr->dictCtx, sizeof(*streamPtr));
                 result = LZ4_compress_generic(streamPtr, source, dest, inputSize, NULL, maxOutputSize, limitedOutput, tableType, usingExtDict, noDictIssue, acceleration);
             } else {
                 result = LZ4_compress_generic(streamPtr, source, dest, inputSize, NULL, maxOutputSize, limitedOutput, tableType, usingDictCtx, noDictIssue, acceleration);
@@ -1675,7 +1675,7 @@ int LZ4_saveDict (LZ4_stream_t* LZ4_dict, char* safeBuffer, int dictSize)
     if ((U32)dictSize > dict->dictSize) { dictSize = (int)dict->dictSize; }
 
     if (safeBuffer == NULL) assert(dictSize == 0);
-    if (safeBuffer != NULL)
+    if (dictSize > 0)
         memmove(safeBuffer, previousDictEnd - dictSize, dictSize);
 
     dict->dictionary = (const BYTE*)safeBuffer;
diff --git a/lib/lz4hc.c b/lib/lz4hc.c
index 8320f33..8c6063f 100644
--- a/lib/lz4hc.c
+++ b/lib/lz4hc.c
@@ -1163,13 +1163,16 @@ int LZ4_saveDictHC (LZ4_streamHC_t* LZ4_streamHCPtr, char* safeBuffer, int dictS
     if (dictSize > 64 KB) dictSize = 64 KB;
     if (dictSize < 4) dictSize = 0;
     if (dictSize > prefixSize) dictSize = prefixSize;
-    memmove(safeBuffer, streamPtr->end - dictSize, dictSize);
+    if (safeBuffer == NULL) assert(dictSize == 0);
+    if (dictSize > 0)
+        memmove(safeBuffer, streamPtr->end - dictSize, dictSize);
     {   U32 const endIndex = (U32)(streamPtr->end - streamPtr->base);
         streamPtr->end = (const BYTE*)safeBuffer + dictSize;
         streamPtr->base = streamPtr->end - endIndex;
         streamPtr->dictLimit = endIndex - (U32)dictSize;
         streamPtr->lowLimit = endIndex - (U32)dictSize;
-        if (streamPtr->nextToUpdate < streamPtr->dictLimit) streamPtr->nextToUpdate = streamPtr->dictLimit;
+        if (streamPtr->nextToUpdate < streamPtr->dictLimit)
+            streamPtr->nextToUpdate = streamPtr->dictLimit;
     }
     return dictSize;
 }