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