gcc/go/gofrontend/go-sha1.h

   1 // go-sha1.h -- GCC specific sha1 checksum utilities.   -*- C++ -*-
   2
   3 // Copyright 2016 The Go Authors. All rights reserved.
   4 // Use of this source code is governed by a BSD-style
   5 // license that can be found in the LICENSE file.
   6
   7 #ifndef GO_SHA1_H
   8 #define GO_SHA1_H
   9
  10 #include "go-system.h"
  11
  12 //
  13 // Interface class for computation of SHA1 checksums. Front end requests
  14 // one of these objects from the back end to use for computing
  15 // checksums (each back end tends to have a different SHA1 implementation).
  16 // Back ends are expected to create a new class that derives from this
  17 // one containing an implementation.
  18 //
  19
  20 class Go_sha1_helper
  21 {
  22  public:
  23   virtual ~Go_sha1_helper() { }
  24   virtual void process_bytes(const void* buffer, size_t len) = 0;
  25   virtual std::string finish() = 0;
  26   static const int checksum_len = 20;
  27 };
  28
  29 // Call to create and return a new sha1 helper (this routine defined
  30 // by the backend). Caller is responsible for deletion.
  31 extern Go_sha1_helper* go_create_sha1_helper();
  32
  33 #endif // !defined(GO_SHA1_H)