1 files changed, 46 insertions, 0 deletions
diff --git a/neozip/crc32.c b/neozip/crc32.c
new file mode 100644
index 0000000000..e31fff62af
--- /dev/null
+++ b/neozip/crc32.c
@@ -0,0 +1,46 @@
+/* crc32.c -- compute the CRC-32 of a data stream
+ * Copyright (C) 1995-2022 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ *
+ * This interleaved implementation of a CRC makes use of pipelined multiple
+ * arithmetic-logic units, commonly found in modern CPU cores. It is due to
+ * Kadatch and Jenkins (2010). See doc/crc-doc.1.0.pdf in this distribution.
+ */
+
+#include "zbuild.h"
+#include "functable.h"
+#include "crc32_braid_tbl.h"
+
+/* ========================================================================= */
+
+const uint32_t * Z_EXPORT PREFIX(get_crc_table)(void) {
+    return (const uint32_t *)crc_table;
+}
+
+#ifdef ZLIB_COMPAT
+unsigned long Z_EXPORT PREFIX(crc32_z)(unsigned long crc, const unsigned char *buf, size_t len) {
+    if (buf == NULL)
+        return CRC32_INITIAL_VALUE;
+    return (unsigned long)FUNCTABLE_CALL(crc32)((uint32_t)crc, buf, len);
+}
+#else
+uint32_t Z_EXPORT PREFIX(crc32_z)(uint32_t crc, const unsigned char *buf, size_t len) {
+    if (buf == NULL)
+        return CRC32_INITIAL_VALUE;
+    return FUNCTABLE_CALL(crc32)(crc, buf, len);
+}
+#endif
+
+#ifdef ZLIB_COMPAT
+unsigned long Z_EXPORT PREFIX(crc32)(unsigned long crc, const unsigned char *buf, unsigned int len) {
+    if (buf == NULL)
+        return CRC32_INITIAL_VALUE;
+    return (unsigned long)FUNCTABLE_CALL(crc32)((uint32_t)crc, buf, len);
+}
+#else
+uint32_t Z_EXPORT PREFIX(crc32)(uint32_t crc, const unsigned char *buf, uint32_t len) {
+    if (buf == NULL)
+        return CRC32_INITIAL_VALUE;
+    return FUNCTABLE_CALL(crc32)(crc, buf, len);
+}
+#endif