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       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                 :        8580 : class Go_sha1_helper
      21                 :             : {
      22                 :             :  public:
      23                 :        4328 :   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)