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1 /* go-sha1.cc -- Go frontend interface to gcc backend.
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2 Copyright (C) 2016-2020 Free Software Foundation, Inc.
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111
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify it under
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7 the terms of the GNU General Public License as published by the Free
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8 Software Foundation; either version 3, or (at your option) any later
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9 version.
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10
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11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with GCC; see the file COPYING3. If not see
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18 <http://www.gnu.org/licenses/>. */
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19
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20 #include "go-sha1.h"
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21 #include "sha1.h"
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22
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23 class Gcc_sha1_helper : public Go_sha1_helper
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24 {
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25 public:
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26
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27 Gcc_sha1_helper() : ctx_(new sha1_ctx) { sha1_init_ctx(this->ctx_); }
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28
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29 ~Gcc_sha1_helper();
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30
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31 // Incorporate 'len' bytes from 'buffer' into checksum.
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32 void
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33 process_bytes(const void* buffer, size_t len);
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34
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35 // Finalize checksum and return in the form of a string.
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36 std::string
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37 finish();
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38
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39 private:
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40 sha1_ctx *ctx_;
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41 };
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42
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43 Gcc_sha1_helper::~Gcc_sha1_helper()
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44 {
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45 delete ctx_;
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46 }
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47
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48 void
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49 Gcc_sha1_helper::process_bytes(const void* buffer, size_t len)
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50 {
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51 sha1_process_bytes(buffer, len, this->ctx_);
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52 }
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53
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54 std::string
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55 Gcc_sha1_helper::finish()
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56 {
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57 // Use a union to provide the required alignment.
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58 union
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59 {
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60 char checksum[checksum_len];
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61 long align;
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62 } u;
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63 sha1_finish_ctx(this->ctx_, u.checksum);
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64 return std::string(u.checksum, checksum_len);
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65 }
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66
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67 Go_sha1_helper*
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68 go_create_sha1_helper()
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69 {
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70 return new Gcc_sha1_helper();
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71 }
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