gcc/go/go-sha1.cc

   1 /* go-sha1.cc -- Go frontend interface to gcc backend.
   2    Copyright (C) 2016-2017 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
  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
  43 Gcc_sha1_helper::~Gcc_sha1_helper()
  44 {
  45   delete ctx_;
  46 }
  47
  48 void
  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
  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*
  68 go_create_sha1_helper()
  69 {
  70   return new Gcc_sha1_helper();
  71 }