From 98c4038df36fb73601c58ccd885d1c2d3703cf6e Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Wed, 8 Sep 2021 08:26:54 +0200
Subject: Factor "buffered streambuf" interface from fdbuf to bufstreambuf

Also rename fdbuf to fdstreambuf for consistency.
---
 libbutl/sha256.mxx | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

(limited to 'libbutl/sha256.mxx')

diff --git a/libbutl/sha256.mxx b/libbutl/sha256.mxx
index 9bc0971..d5128b1 100644
--- a/libbutl/sha256.mxx
+++ b/libbutl/sha256.mxx
@@ -9,6 +9,7 @@
 
 #ifndef __cpp_lib_modules_ts
 #include <string>
+#include <iosfwd>      // istream
 #include <cstddef>     // size_t
 #include <cstdint>
 #include <cstring>     // strlen(), memcpy()
@@ -28,8 +29,6 @@ import std.core;
 
 LIBBUTL_MODEXPORT namespace butl
 {
-  class ifdstream;
-
   // SHA256 checksum calculator.
   //
   // For a single chunk of data a sum can be obtained in one line, for
@@ -101,11 +100,14 @@ LIBBUTL_MODEXPORT namespace butl
 
     // Append stream.
     //
+    // Note that currently the stream is expected to be bufstreambuf-based
+    // (e.g., ifdstream).
+    //
     void
-    append (ifdstream&);
+    append (std::istream&);
 
     explicit
-    sha256 (ifdstream& i): sha256 () {append (i);}
+    sha256 (std::istream& i): sha256 () {append (i);}
 
     // Check if any data has been hashed.
     //
-- 
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