1 files changed, 37 insertions, 0 deletions
diff --git a/third_party/libwebrtc/rtc_base/crc32.h b/third_party/libwebrtc/rtc_base/crc32.h
new file mode 100644
index 0000000000..93376a5a12
--- /dev/null
+++ b/third_party/libwebrtc/rtc_base/crc32.h
@@ -0,0 +1,37 @@
+/*
+ *  Copyright 2012 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef RTC_BASE_CRC32_H_
+#define RTC_BASE_CRC32_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <string>
+
+#include "absl/strings/string_view.h"
+
+namespace rtc {
+
+// Updates a CRC32 checksum with `len` bytes from `buf`. `initial` holds the
+// checksum result from the previous update; for the first call, it should be 0.
+uint32_t UpdateCrc32(uint32_t initial, const void* buf, size_t len);
+
+// Computes a CRC32 checksum using `len` bytes from `buf`.
+inline uint32_t ComputeCrc32(const void* buf, size_t len) {
+  return UpdateCrc32(0, buf, len);
+}
+inline uint32_t ComputeCrc32(absl::string_view str) {
+  return ComputeCrc32(str.data(), str.size());
+}
+
+}  // namespace rtc
+
+#endif  // RTC_BASE_CRC32_H_