vendor: OpenCV 5.0.0 snapshot at 40738fb16ceddb5fb3fea747585f7ce6abb0605b

2026-08-22 00:10:33 +08:00
commit f7f077da11
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+/* 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 0;
+
+    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 0;
+
+    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) {
+    return (unsigned long)PREFIX(crc32_z)((uint32_t)crc, buf, len);
+}
+#else
+uint32_t Z_EXPORT PREFIX(crc32)(uint32_t crc, const unsigned char *buf, uint32_t len) {
+    return PREFIX(crc32_z)(crc, buf, len);
+}
+#endif