Add example/hash2sum.cpp

example/Jamfile

@@ -4,3 +4,4 @@
 project : default-build release <link>static ;
 
 exe md5sum : md5sum.cpp ;
+exe hash2sum : hash2sum.cpp ;

example/hash2sum.cpp

@@ -0,0 +1,136 @@
+// Copyright 2024 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#define _CRT_SECURE_NO_WARNINGS
+
+#include <boost/hash2/md5.hpp>
+#include <boost/hash2/sha1.hpp>
+#include <boost/hash2/sha2.hpp>
+#include <boost/hash2/ripemd.hpp>
+#include <boost/mp11.hpp>
+#include <array>
+#include <string>
+#include <cerrno>
+#include <cstdio>
+
+template<std::size_t N> std::string result_to_string( std::array<unsigned char, N> const & v )
+{
+    std::string r;
+
+    for( std::size_t i = 0; i < N; ++i )
+    {
+        char buffer[ 8 ];
+        std::snprintf( buffer, sizeof( buffer ), "%02x", static_cast<int>( v[ i ] ) );
+
+        r += buffer;
+    }
+
+    return r;
+}
+
+template<class Hash> void hash2sum( std::FILE* f, char const* fn )
+{
+    Hash hash;
+
+    int const N = 4096;
+    unsigned char buffer[ N ];
+
+    for( ;; )
+    {
+        std::size_t n = std::fread( buffer, 1, N, f );
+
+        if( std::ferror( f ) )
+        {
+            std::fprintf( stderr, "'%s': read error: %s\n", fn, std::strerror( errno ) );
+            return;
+        }
+
+        if( n == 0 ) break;
+
+        hash.update( buffer, n );
+    }
+
+    std::string digest = result_to_string( hash.result() );
+
+    std::printf( "%s *%s\n", digest.c_str(), fn );
+}
+
+template<class Hash> void hash2sum( char const* fn )
+{
+    std::FILE* f = std::fopen( fn, "rb" );
+
+    if( f == 0 )
+    {
+        std::fprintf( stderr, "'%s': open error: %s\n", fn, std::strerror( errno ) );
+    }
+    else
+    {
+        hash2sum<Hash>( f, fn );
+        std::fclose( f );
+    }
+}
+
+using namespace boost::mp11;
+using namespace boost::hash2;
+
+using hashes = mp_list<
+
+    md5_128,
+    sha1_160,
+    sha2_256,
+    sha2_224,
+    sha2_512,
+    sha2_384,
+    sha2_512_256,
+    sha2_512_224,
+    ripemd_160
+
+>;
+
+constexpr char const* names[] = {
+
+    "md5_128",
+    "sha1_160",
+    "sha2_256",
+    "sha2_224",
+    "sha2_512",
+    "sha2_384",
+    "sha2_512_256",
+    "sha2_512_224",
+    "ripemd_160"
+
+};
+
+int main( int argc, char const* argv[] )
+{
+    if( argc < 2 )
+    {
+        std::fputs( "usage: hash2sum <hash> <files...>\n", stderr );
+        return 2;
+    }
+
+    std::string hash( argv[1] );
+    bool found = false;
+
+    mp_for_each< mp_iota<mp_size<hashes>> >([&](auto I){
+
+        if( hash == names[ I ] )
+        {
+            using Hash = mp_at_c<hashes, I>;
+
+            for( int i = 2; i < argc; ++i )
+            {
+                hash2sum<Hash>( argv[i] );
+            }
+
+            found = true;
+        }
+
+    });
+
+    if( !found )
+    {
+        std::fprintf( stderr, "hash2sum: unknown hash name '%s'\n", hash.c_str() );
+    }
+}

example/md5sum.cpp

@@ -17,7 +17,6 @@ template<std::size_t N> std::string result_to_string( std::array<unsigned char,
     for( std::size_t i = 0; i < N; ++i )
     {
         char buffer[ 8 ];
-
         std::snprintf( buffer, sizeof( buffer ), "%02x", static_cast<int>( v[ i ] ) );
 
         r += buffer;

test/Jamfile

@@ -1,4 +1,4 @@
-# Copyright 2017-2023 Peter Dimov
+# Copyright 2017-2024 Peter Dimov
 # Distributed under the Boost Software License, Version 1.0.
 
 import testing ;
@@ -51,10 +51,13 @@ run xxhash.cpp ;
 
 run md5.cpp ;
 run hmac_md5.cpp ;
+
 run sha1.cpp ;
-run sha2.cpp ;
 run hmac_sha1.cpp ;
+
+run sha2.cpp ;
 run hmac_sha2.cpp ;
+
 run ripemd.cpp ;
 
 # legacy
@@ -70,13 +73,14 @@ run plaintext_leak.cpp ;
 run multiple_result.cpp ;
 run integral_result.cpp ;
 
-# compile benchmarks
+# benchmarks
 
-compile ../benchmark/buffer.cpp ;
-compile ../benchmark/unordered.cpp ;
-compile ../benchmark/average.cpp ;
-compile ../benchmark/keys.cpp ;
+link ../benchmark/buffer.cpp ;
+link ../benchmark/unordered.cpp ;
+link ../benchmark/average.cpp ;
+link ../benchmark/keys.cpp ;
 
-# compile examples
+# examples
 
-compile ../example/md5sum.cpp ;
+link ../example/md5sum.cpp ;
+link ../example/hash2sum.cpp ;