//===-- llvm/Support/DJB.h ---DJB Hash --------------------------*- C++ -*-===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // // This file contains support for the DJ Bernstein hash function. // //===----------------------------------------------------------------------===// #ifndef LLVM_SUPPORT_DJB_H #define LLVM_SUPPORT_DJB_H #include "llvm/ADT/StringRef.h" namespace llvm { /// The Bernstein hash function used by the DWARF accelerator tables. inline uint32_t djbHash(StringRef Buffer, uint32_t H = 5381) { for (unsigned char C : Buffer.bytes()) H = (H << 5) + H + C; return H; } /// Computes the Bernstein hash after folding the input according to the Dwarf 5 /// standard case folding rules. uint32_t caseFoldingDjbHash(StringRef Buffer, uint32_t H = 5381); } // namespace llvm #endif // LLVM_SUPPORT_DJB_H