LLVM  9.0.0svn
raw_sha1_ostream.h
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1 //==- raw_sha1_ostream.h - raw_ostream that compute SHA1 --*- C++ -*-==//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file defines the raw_sha1_ostream class.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_SUPPORT_RAW_SHA1_OSTREAM_H
14 #define LLVM_SUPPORT_RAW_SHA1_OSTREAM_H
15 
16 #include "llvm/ADT/ArrayRef.h"
17 #include "llvm/Support/SHA1.h"
19 
20 namespace llvm {
21 
22 /// A raw_ostream that hash the content using the sha1 algorithm.
23 class raw_sha1_ostream : public raw_ostream {
24  SHA1 State;
25 
26  /// See raw_ostream::write_impl.
27  void write_impl(const char *Ptr, size_t Size) override {
28  State.update(ArrayRef<uint8_t>((const uint8_t *)Ptr, Size));
29  }
30 
31 public:
32  /// Return the current SHA1 hash for the content of the stream
34  flush();
35  return State.result();
36  }
37 
38  /// Reset the internal state to start over from scratch.
39  void resetHash() { State.init(); }
40 
41  uint64_t current_pos() const override { return 0; }
42 };
43 
44 } // end llvm namespace
45 
46 #endif
This class represents lattice values for constants.
Definition: AllocatorList.h:23
A class that wrap the SHA1 algorithm.
Definition: SHA1.h:28
void init()
Reinitialize the internal state.
Definition: SHA1.cpp:84
StringRef result()
Return a reference to the current raw 160-bits SHA1 for the digested data since the last call to init...
Definition: SHA1.cpp:260
void update(ArrayRef< uint8_t > Data)
Digest more data.
Definition: SHA1.cpp:212
void resetHash()
Reset the internal state to start over from scratch.
uint64_t current_pos() const override
Return the current position within the stream, not counting the bytes currently in the buffer...
A raw_ostream that hash the content using the sha1 algorithm.
StringRef sha1()
Return the current SHA1 hash for the content of the stream.
uint32_t Size
Definition: Profile.cpp:46
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:45
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:48