diff options
Diffstat (limited to 'nix/libutil/gcrypt-hash.hh')
| -rw-r--r-- | nix/libutil/gcrypt-hash.hh | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/nix/libutil/gcrypt-hash.hh b/nix/libutil/gcrypt-hash.hh index d93a6eb881..11f061159f 100644 --- a/nix/libutil/gcrypt-hash.hh +++ b/nix/libutil/gcrypt-hash.hh @@ -23,17 +23,28 @@ #include <gcrypt.h> #include <unistd.h> -extern "C" { - 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); - } |