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[android-x86/external-llvm.git] / include / llvm / Support / raw_sha1_ostream.h
1 //==- raw_sha1_ostream.h - raw_ostream that compute SHA1        --*- C++ -*-==//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 //  This file defines the raw_sha1_ostream class.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #ifndef LLVM_SUPPORT_RAW_SHA1_OSTREAM_H
15 #define LLVM_SUPPORT_RAW_SHA1_OSTREAM_H
16
17 #include "llvm/ADT/ArrayRef.h"
18 #include "llvm/Support/SHA1.h"
19 #include "llvm/Support/raw_ostream.h"
20
21 namespace llvm {
22
23 /// A raw_ostream that hash the content using the sha1 algorithm.
24 class raw_sha1_ostream : public raw_ostream {
25   SHA1 State;
26
27   /// See raw_ostream::write_impl.
28   void write_impl(const char *Ptr, size_t Size) override {
29     State.update(ArrayRef<uint8_t>((const uint8_t *)Ptr, Size));
30   }
31
32 public:
33   /// Return the current SHA1 hash for the content of the stream
34   StringRef sha1() {
35     flush();
36     return State.result();
37   }
38
39   /// Reset the internal state to start over from scratch.
40   void resetHash() { State.init(); }
41
42   uint64_t current_pos() const override { return 0; }
43 };
44
45 } // end llvm namespace
46
47 #endif