check some more initialization result

ensure it's not NULL.

diff --git a/lib/lz4.c b/lib/lz4.c
index 04a30e7..5fbc7c7 100644 (file)
--- a/lib/lz4.c
+++ b/lib/lz4.c
@@ -1126,6 +1126,7 @@ _failure:
 int LZ4_compress_fast_extState(void* state, const char* source, char* dest, int inputSize, int maxOutputSize, int acceleration)
 {
     LZ4_stream_t_internal* const ctx = & LZ4_initStream(state, sizeof(LZ4_stream_t)) -> internal_donotuse;
+    assert(ctx != NULL);
     if (acceleration < 1) acceleration = ACCELERATION_DEFAULT;
     if (maxOutputSize >= LZ4_compressBound(inputSize)) {
         if (inputSize < LZ4_64Klimit) {
@@ -1236,7 +1237,8 @@ int LZ4_compress_fast_force(const char* src, char* dst, int srcSize, int dstCapa
  * _continue() call without resetting it. */
 static int LZ4_compress_destSize_extState (LZ4_stream_t* state, const char* src, char* dst, int* srcSizePtr, int targetDstSize)
 {
-    LZ4_initStream(state, sizeof (*state));
+    void* const s = LZ4_initStream(state, sizeof (*state));
+    assert(s != NULL); (void)s;
 
     if (targetDstSize >= LZ4_compressBound(*srcSizePtr)) {  /* compression success is guaranteed */
         return LZ4_compress_fast_extState(state, src, dst, *srcSizePtr, targetDstSize, 1);
@@ -1307,6 +1309,8 @@ LZ4_stream_t* LZ4_initStream (void* buffer, size_t size)
     return (LZ4_stream_t*)buffer;
 }
 
+/* resetStream is now deprecated,
+ * prefer initStream() which is more general */
 void LZ4_resetStream (LZ4_stream_t* LZ4_stream)
 {
     DEBUGLOG(5, "LZ4_resetStream (ctx:%p)", LZ4_stream);