/* GNU Guix --- Functional package management for GNU
   Copyright (C) 2012, 2013  Ludovic Courtès <ludo@gnu.org>

   This file is part of GNU Guix.

   GNU Guix is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or (at
   your option) any later version.

   GNU Guix is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.  */

/* An OpenSSL-like interface to GNU libgcrypt cryptographic hash
   functions.  */

#pragma once
#include <gcrypt.h>
#include <unistd.h>

struct guix_hash_context
{
  /* This copy constructor is needed in 'HashSink::currentHash()' where we
     expect the copy of a 'Ctx' object to yield a truly different context.  */
  guix_hash_context (guix_hash_context &ref)
  {
    if (ref.md_handle == NULL)
      md_handle = NULL;
    else
      gcry_md_copy (&md_handle, ref.md_handle);
  }

  /* Make sure 'md_handle' is always initialized.  */
  guix_hash_context (): md_handle (NULL) { };

  gcry_md_hd_t md_handle;
};

extern "C" {
extern void guix_hash_init (struct guix_hash_context *ctx, int algo);
extern void guix_hash_update (struct guix_hash_context *ctx, const void *buffer,
			      size_t len);
extern void guix_hash_final (void *resbuf, struct guix_hash_context *ctx,
			     int algo);
}
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<div class='path'>path: <a href='/guix/log/?id=b7ee2e458ac3d218d170b9a66efb7c9abf4bff9e'>root</a>/<a href='/guix/log/tests?id=b7ee2e458ac3d218d170b9a66efb7c9abf4bff9e'>tests</a>/<a href='/guix/log/tests/uuid.scm?id=b7ee2e458ac3d218d170b9a66efb7c9abf4bff9e'>uuid.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/uuid.scm?id=b7ee2e458ac3d218d170b9a66efb7c9abf4bff9e&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-05-07 12:18:44 +0200'>2019-05-07</span></td><td><a href='/guix/commit/tests/uuid.scm?id=6c5790a2faf8ffc401e43b13425a707394e40874'>uuid: 'fat-uuid-&gt;string' preserves leading zeros.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-05-19 00:14:52 +0200'>2018-05-19</span></td><td><a href='/guix/commit/tests/uuid.scm?id=263c9941a1e523b360ca9f42d1ed6b11e6e6e285'>uuid: 'uuid' returns #f when 'string-&gt;uuid' returns #f.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>