zstd_v02.c in zstd-ruby-1.4.5.0

- old
+ new

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
+ * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
  * All rights reserved.
  *
  * This source code is licensed under both the BSD-style license (found in the
  * LICENSE file in the root directory of this source tree) and the GPLv2 (found
  * in the COPYING file in the root directory of this source tree).
@@ -9,11 +9,11 @@
  */
 
 
 #include <stddef.h>    /* size_t, ptrdiff_t */
 #include "zstd_v02.h"
-#include "error_private.h"
+#include "../common/error_private.h"
 
 
 /******************************************
 *  Compiler-specific
 ******************************************/
@@ -187,11 +187,11 @@
 MEM_STATIC void MEM_write16(void* memPtr, U16 value)
 {
     memcpy(memPtr, &value, sizeof(value));
 }
 
-#endif // MEM_FORCE_MEMORY_ACCESS
+#endif /* MEM_FORCE_MEMORY_ACCESS */
 
 
 MEM_STATIC U16 MEM_readLE16(const void* memPtr)
 {
     if (MEM_isLittleEndian())
@@ -2834,11 +2834,13 @@
 }
 
 static size_t ZSTD_copyUncompressedBlock(void* dst, size_t maxDstSize, const void* src, size_t srcSize)
 {
     if (srcSize > maxDstSize) return ERROR(dstSize_tooSmall);
-    memcpy(dst, src, srcSize);
+    if (srcSize > 0) {
+        memcpy(dst, src, srcSize);
+    }
     return srcSize;
 }
 
 
 /** ZSTD_decompressLiterals
@@ -3227,11 +3229,13 @@
         /* last literal segment */
         {
             size_t lastLLSize = litEnd - litPtr;
             if (litPtr > litEnd) return ERROR(corruption_detected);
             if (op+lastLLSize > oend) return ERROR(dstSize_tooSmall);
-            if (op != litPtr) memmove(op, litPtr, lastLLSize);
-            op += lastLLSize;
+            if (lastLLSize > 0) {
+                if (op != litPtr) memmove(op, litPtr, lastLLSize);
+                op += lastLLSize;
+            }
         }
     }
 
     return op-ostart;
 }