1 /* go-sha1.cc -- Go frontend interface to gcc backend.
2 Copyright (C) 2016-2021 Free Software Foundation, Inc.
3
4 This file is part of GCC.
5
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
9 version.
10
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
19
20 #include "go-sha1.h"
21 #include "sha1.h"
22
23 class Gcc_sha1_helper : public Go_sha1_helper
24 {
25 public:
26
Gcc_sha1_helper()27 Gcc_sha1_helper() : ctx_(new sha1_ctx) { sha1_init_ctx(this->ctx_); }
28
29 ~Gcc_sha1_helper();
30
31 // Incorporate 'len' bytes from 'buffer' into checksum.
32 void
33 process_bytes(const void* buffer, size_t len);
34
35 // Finalize checksum and return in the form of a string.
36 std::string
37 finish();
38
39 private:
40 sha1_ctx *ctx_;
41 };
42
~Gcc_sha1_helper()43 Gcc_sha1_helper::~Gcc_sha1_helper()
44 {
45 delete ctx_;
46 }
47
48 void
process_bytes(const void * buffer,size_t len)49 Gcc_sha1_helper::process_bytes(const void* buffer, size_t len)
50 {
51 sha1_process_bytes(buffer, len, this->ctx_);
52 }
53
54 std::string
finish()55 Gcc_sha1_helper::finish()
56 {
57 // Use a union to provide the required alignment.
58 union
59 {
60 char checksum[checksum_len];
61 long align;
62 } u;
63 sha1_finish_ctx(this->ctx_, u.checksum);
64 return std::string(u.checksum, checksum_len);
65 }
66
67 Go_sha1_helper*
go_create_sha1_helper()68 go_create_sha1_helper()
69 {
70 return new Gcc_sha1_helper();
71 }
72