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| Rev | Author | Line No. | Line |
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| 14 | pmbaty | 1 | //==- raw_sha1_ostream.h - raw_ostream that compute SHA1 --*- C++ -*-==// |
| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // This file defines the raw_sha1_ostream class. |
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| 10 | // |
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| 11 | //===----------------------------------------------------------------------===// |
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| 12 | |||
| 13 | #ifndef LLVM_SUPPORT_RAW_SHA1_OSTREAM_H |
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| 14 | #define LLVM_SUPPORT_RAW_SHA1_OSTREAM_H |
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| 15 | |||
| 16 | #include "llvm/ADT/ArrayRef.h" |
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| 17 | #include "llvm/Support/SHA1.h" |
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| 18 | #include "llvm/Support/raw_ostream.h" |
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| 19 | |||
| 20 | namespace llvm { |
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| 21 | |||
| 22 | /// A raw_ostream that hash the content using the sha1 algorithm. |
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| 23 | class raw_sha1_ostream : public raw_ostream { |
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| 24 | SHA1 State; |
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| 25 | |||
| 26 | /// See raw_ostream::write_impl. |
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| 27 | void write_impl(const char *Ptr, size_t Size) override { |
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| 28 | State.update(ArrayRef<uint8_t>((const uint8_t *)Ptr, Size)); |
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| 29 | } |
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| 30 | |||
| 31 | public: |
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| 32 | /// Return the current SHA1 hash for the content of the stream |
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| 33 | std::array<uint8_t, 20> sha1() { |
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| 34 | flush(); |
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| 35 | return State.result(); |
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| 36 | } |
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| 37 | |||
| 38 | /// Reset the internal state to start over from scratch. |
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| 39 | void resetHash() { State.init(); } |
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| 40 | |||
| 41 | uint64_t current_pos() const override { return 0; } |
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| 42 | }; |
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| 43 | |||
| 44 | } // end llvm namespace |
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| 45 | |||
| 46 | #endif |