fixed -Wconversion for lib/decompress/zstd_decompress_block.c

Author: Cyan4973

lib/common/compiler.h

@@ -357,9 +357,9 @@ ptrdiff_t ZSTD_wrappedPtrDiff(unsigned char const* lhs, unsigned char const* rhs
  */
 MEM_STATIC
 ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
-unsigned char const* ZSTD_wrappedPtrAdd(unsigned char const* ptr, ptrdiff_t add)
+const void* ZSTD_wrappedPtrAdd(const void* ptr, ptrdiff_t add)
 {
-    return ptr + add;
+    return (const char*)ptr + add;
 }
 
 /**
@@ -370,9 +370,9 @@ unsigned char const* ZSTD_wrappedPtrAdd(unsigned char const* ptr, ptrdiff_t add)
  */
 MEM_STATIC
 ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
-unsigned char const* ZSTD_wrappedPtrSub(unsigned char const* ptr, ptrdiff_t sub)
+const void* ZSTD_wrappedPtrSub(const void* ptr, ptrdiff_t sub)
 {
-    return ptr - sub;
+    return (const char*)ptr - sub;
 }
 
 /**
@@ -382,9 +382,9 @@ unsigned char const* ZSTD_wrappedPtrSub(unsigned char const* ptr, ptrdiff_t sub)
  * @returns `ptr + add` except it defines `NULL + 0 == NULL`.
  */
 MEM_STATIC
-unsigned char* ZSTD_maybeNullPtrAdd(unsigned char* ptr, ptrdiff_t add)
+void* ZSTD_maybeNullPtrAdd(void* ptr, ptrdiff_t add)
 {
-    return add > 0 ? ptr + add : ptr;
+    return add > 0 ? (char*)ptr + add : ptr;
 }
 
 /* Issue #3240 reports an ASAN failure on an llvm-mingw build. Out of an

lib/common/zstd_internal.h

@@ -213,7 +213,7 @@ typedef enum {
  *           The src buffer must be before the dst buffer.
  */
 MEM_STATIC FORCE_INLINE_ATTR
-void ZSTD_wildcopy(void* dst, const void* src, ptrdiff_t length, ZSTD_overlap_e const ovtype)
+void ZSTD_wildcopy(void* dst, const void* src, size_t length, ZSTD_overlap_e const ovtype)
 {
     ptrdiff_t diff = (BYTE*)dst - (const BYTE*)src;
     const BYTE* ip = (const BYTE*)src;

lib/compress/zstd_compress_internal.h

@@ -707,7 +707,7 @@ ZSTD_safecopyLiterals(BYTE* op, BYTE const* ip, BYTE const* const iend, BYTE con
 {
     assert(iend > ilimit_w);
     if (ip <= ilimit_w) {
-        ZSTD_wildcopy(op, ip, ilimit_w - ip, ZSTD_no_overlap);
+        ZSTD_wildcopy(op, ip, (size_t)(ilimit_w - ip), ZSTD_no_overlap);
         op += ilimit_w - ip;
         ip = ilimit_w;
     }
@@ -800,7 +800,7 @@ ZSTD_storeSeq(SeqStore_t* seqStorePtr,
         ZSTD_STATIC_ASSERT(WILDCOPY_OVERLENGTH >= 16);
         ZSTD_copy16(seqStorePtr->lit, literals);
         if (litLength > 16) {
-            ZSTD_wildcopy(seqStorePtr->lit+16, literals+16, (ptrdiff_t)litLength-16, ZSTD_no_overlap);
+            ZSTD_wildcopy(seqStorePtr->lit+16, literals+16, litLength-16, ZSTD_no_overlap);
         }
     } else {
         ZSTD_safecopyLiterals(seqStorePtr->lit, literals, litEnd, litLimit_w);