From c09cd7512491cee1e82c1ad8128ce9fd4bc3f79b Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 22 Sep 2017 23:32:28 +0200
Subject: Initial modularization with both Clang and VC hacks

Note: gave up on VC about half way though.
---
 libbutl/sha256.hxx | 135 -----------------------------------------------------
 1 file changed, 135 deletions(-)
 delete mode 100644 libbutl/sha256.hxx

(limited to 'libbutl/sha256.hxx')

diff --git a/libbutl/sha256.hxx b/libbutl/sha256.hxx
deleted file mode 100644
index 459b46c..0000000
--- a/libbutl/sha256.hxx
+++ /dev/null
@@ -1,135 +0,0 @@
-// file      : libbutl/sha256.hxx -*- C++ -*-
-// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
-// license   : MIT; see accompanying LICENSE file
-
-#ifndef LIBBUTL_SHA256_HXX
-#define LIBBUTL_SHA256_HXX
-
-#include <string>
-#include <cstring>     // strlen(), memcpy()
-#include <cstdint>
-#include <cstddef>     // size_t
-#include <type_traits> // enable_if, is_integral
-
-#include <libbutl/export.hxx>
-
-namespace butl
-{
-  // SHA256 checksum calculator.
-  //
-  // For a single chunk of data a sum can be obtained in one line, for
-  // example:
-  //
-  // cerr << sha256 ("123").string () << endl;
-  //
-  class LIBBUTL_SYMEXPORT sha256
-  {
-  public:
-    sha256 ();
-
-    // Append binary data.
-    //
-    void
-    append (const void*, std::size_t);
-
-    sha256 (const void* b, std::size_t n): sha256 () {append (b, n);}
-
-    // Append string.
-    //
-    // Note that the hash includes the '\0' terminator. Failed that, a call
-    // with an empty string will be indistinguishable from no call at all.
-    //
-    void
-    append (const std::string& s) {append (s.c_str (), s.size () + 1);}
-
-    void
-    append (const char* s) {append (s, std::strlen (s) + 1);}
-
-    explicit
-    sha256 (const std::string& s): sha256 () {append (s);}
-
-    explicit
-    sha256 (const char* s): sha256 () {append (s);}
-
-    // Append an integral type with a fast path optimization (see
-    // SHA256_Update() for details).
-    //
-    void
-    append (char c)
-    {
-      std::uint32_t r ((ctx_.count >> 3) & 0x3f);
-
-      if (1 < 64 - r)
-      {
-        ctx_.buf[r] = static_cast<std::uint8_t> (c);
-        ctx_.count += 8;
-      }
-      else
-        append (&c, 1);
-    }
-
-    template <typename T>
-    typename std::enable_if<std::is_integral<T>::value>::type
-    append (T x)
-    {
-      const std::size_t len (sizeof (x));
-      std::uint32_t r ((ctx_.count >> 3) & 0x3f);
-
-      if (len < 64 - r)
-      {
-        std::memcpy (&ctx_.buf[r], &x, sizeof (x));
-        ctx_.count += len << 3;
-      }
-      else
-        append (&x, len);
-    }
-
-    // Extract result.
-    //
-    // It can be obtained as either a 32-byte binary digest or as a 64-
-    // character hex-encoded C-string.
-    //
-    using digest_type = std::uint8_t[32];
-
-    const digest_type&
-    binary () const;
-
-    const char*
-    string () const;
-
-  public:
-    struct context
-    {
-      std::uint32_t state[8];
-      std::uint64_t count;
-      std::uint8_t buf[64];
-    };
-
-  private:
-    union
-    {
-      mutable context ctx_;
-      mutable char str_[65];
-    };
-
-    mutable digest_type bin_;
-    mutable bool done_;
-  };
-
-  // Convert a SHA256 string representation (64 hex digits) to the fingerprint
-  // canonical representation (32 colon-separated upper case hex digit pairs,
-  // like 01:AB:CD:...). Throw invalid_argument if the argument is not a valid
-  // SHA256 string.
-  //
-  LIBBUTL_SYMEXPORT std::string
-  sha256_to_fingerprint (const std::string&);
-
-  // Convert a fingerprint (32 colon-separated hex digit pairs) to the SHA256
-  // string representation (64 lower case hex digits). Throw invalid_argument
-  // if the argument is not a valid fingerprint.
-  //
-  LIBBUTL_SYMEXPORT std::string
-  fingerprint_to_sha256 (const std::string&);
-}
-
-#endif // LIBBUTL_SHA256_HXX
-- 
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