47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
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//==- raw_sha1_ostream.h - raw_ostream that compute SHA1 --*- C++ -*-==//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the raw_sha1_ostream class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_RAW_SHA1_OSTREAM_H
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#define LLVM_SUPPORT_RAW_SHA1_OSTREAM_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/Support/SHA1.h"
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#include "llvm/Support/raw_ostream.h"
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namespace llvm {
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/// A raw_ostream that hash the content using the sha1 algorithm.
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class raw_sha1_ostream : public raw_ostream {
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SHA1 State;
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/// See raw_ostream::write_impl.
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void write_impl(const char *Ptr, size_t Size) override {
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State.update(ArrayRef<uint8_t>((const uint8_t *)Ptr, Size));
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}
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public:
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/// Return the current SHA1 hash for the content of the stream
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StringRef sha1() {
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flush();
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return State.result();
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}
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/// Reset the internal state to start over from scratch.
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void resetHash() { State.init(); }
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uint64_t current_pos() const override { return 0; }
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};
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} // end llvm namespace
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#endif
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