Rename from memchunk to chunkset.

1 files changed, 66 insertions, 0 deletions

diff --git a/chunkset.c b/chunkset.c
new file mode 100644
index 0000000..2e48dda
--- /dev/null
+++ b/chunkset.c
@@ -0,0 +1,66 @@
+/* chunkset.c -- inline functions to copy small data chunks.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#include "zbuild.h"
+#include "zutil.h"
+
+#ifdef UNALIGNED_OK
+typedef uint64_t chunk_t;
+#else
+typedef uint8_t chunk_t[8];
+#endif
+
+#define HAVE_CHUNKMEMSET_1
+#define HAVE_CHUNKMEMSET_4
+#define HAVE_CHUNKMEMSET_8
+
+static inline void chunkmemset_1(uint8_t *from, chunk_t *chunk) {
+#ifdef UNALIGNED_OK
+    *chunk = 0x0101010101010101 * (uint8_t)*from;
+#else
+    memset(chunk, *from, sizeof(chunk_t));
+#endif
+}
+
+static inline void chunkmemset_4(uint8_t *from, chunk_t *chunk) {
+#ifdef UNALIGNED_OK
+    uint32_t half_chunk;
+    half_chunk = *(uint32_t *)from;
+    *chunk = 0x0000000100000001 * (uint64_t)half_chunk;
+#else
+    uint8_t *chunkptr = (uint8_t *)chunk;
+    memcpy(chunkptr, from, 4);
+    memcpy(chunkptr+4, from, 4);
+#endif
+}
+
+static inline void chunkmemset_8(uint8_t *from, chunk_t *chunk) {
+#ifdef UNALIGNED_OK
+    *chunk = *(uint64_t *)from;
+#else
+    memcpy(chunk, from, sizeof(chunk_t));
+#endif
+}
+
+static inline void loadchunk(uint8_t const *s, chunk_t *chunk) {
+    chunkmemset_8((uint8_t *)s, chunk);
+}
+
+static inline void storechunk(uint8_t *out, chunk_t *chunk) {
+#ifdef UNALIGNED_OK
+    *(uint64_t *)out = *chunk;
+#else
+    /* Cast to chunk_t pointer to avoid compiler error on MSVC ARM */
+    memcpy((chunk_t *)out, chunk, sizeof(chunk_t ));
+#endif
+}
+
+#define CHUNKSIZE        chunksize_c
+#define CHUNKCOPY        chunkcopy_c
+#define CHUNKCOPY_SAFE   chunkcopy_safe_c
+#define CHUNKUNROLL      chunkunroll_c
+#define CHUNKMEMSET      chunkmemset_c
+#define CHUNKMEMSET_SAFE chunkmemset_safe_c
+
+#include "chunkset_tpl.h"