From 354bb40e75d94466e91fe6960523612c9d17ccfb Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Thu, 2 Nov 2017 23:11:29 +0300
Subject: Add implementation

---
 mysql/extra/yassl/taocrypt/include/file.hpp | 130 ++++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100644 mysql/extra/yassl/taocrypt/include/file.hpp

(limited to 'mysql/extra/yassl/taocrypt/include/file.hpp')

diff --git a/mysql/extra/yassl/taocrypt/include/file.hpp b/mysql/extra/yassl/taocrypt/include/file.hpp
new file mode 100644
index 0000000..9851a00
--- /dev/null
+++ b/mysql/extra/yassl/taocrypt/include/file.hpp
@@ -0,0 +1,130 @@
+/*
+   Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
+
+   This program 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; version 2 of the License.
+
+   This program 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 this program; see the file COPYING. If not, write to the
+   Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+   MA  02110-1301  USA.
+*/
+
+/* file.hpp provies File Sources and Sinks
+*/
+
+
+#ifndef TAO_CRYPT_FILE_HPP
+#define TAO_CRYPT_FILE_HPP
+
+#include "misc.hpp"
+#include "block.hpp"
+#include "error.hpp"
+#include <stdio.h>
+
+namespace TaoCrypt {
+
+
+class Source {
+    ByteBlock buffer_;
+    word32    current_;
+    Error     error_;
+public:
+    explicit Source(word32 sz = 0) : buffer_(sz), current_(0) {}
+    Source(const byte* b, word32 sz) : buffer_(b, sz), current_(0) {}
+
+    word32 remaining()         { if (GetError().What()) return 0;
+                                 else return buffer_.size() - current_; } 
+    word32 size() const        { return buffer_.size(); }
+    void   grow(word32 sz)     { buffer_.CleanGrow(sz); }
+
+    bool IsLeft(word32 sz) { if (remaining() >= sz) return true;
+                             else { SetError(CONTENT_E); return false; } }
+   
+    const byte*  get_buffer()  const { return buffer_.get_buffer(); }
+    const byte*  get_current() const { return &buffer_[current_]; }
+    word32       get_index()   const { return current_; }
+    void         set_index(word32 i) { if (i < size()) current_ = i; }
+
+    byte operator[] (word32 i) { current_ = i; return next(); }
+    byte next() { if (IsLeft(1)) return buffer_[current_++]; else return 0; }
+    byte prev() { if (current_)  return buffer_[--current_]; else return 0; }
+
+    void add(const byte* data, word32 len)
+    {
+        if (IsLeft(len)) {
+            memcpy(buffer_.get_buffer() + current_, data, len);
+            current_ += len;
+        }
+    }
+
+    void advance(word32 i) { if (IsLeft(i)) current_ += i; }
+    void reset(ByteBlock&);
+
+    Error  GetError()              { return error_; }
+    void   SetError(ErrorNumber w) { error_.SetError(w); }
+
+    friend class FileSource;  // for get()
+
+    Source(const Source& that)
+        : buffer_(that.buffer_), current_(that.current_) {}
+
+    Source& operator=(const Source& that)
+    {
+        Source tmp(that);
+        Swap(tmp);
+        return *this;
+    }
+
+    void Swap(Source& other) 
+    {
+        buffer_.Swap(other.buffer_);
+        STL::swap(current_, other.current_);
+    }
+
+};
+
+
+// File Source
+class FileSource {
+    FILE* file_;
+public:
+    FileSource(const char* fname, Source& source);
+    ~FileSource();
+   
+    word32   size(bool use_current = false);
+private:
+    word32   get(Source&);
+    word32   size_left();                     
+
+    FileSource(const FileSource&);            // hide
+    FileSource& operator=(const FileSource&); // hide
+};
+
+
+// File Sink
+class FileSink {
+    FILE* file_;
+public:
+    FileSink(const char* fname, Source& source);
+    ~FileSink();
+
+    word32 size(bool use_current = false);
+private:
+    void put(Source&);
+
+    FileSink(const FileSink&);            // hide
+    FileSink& operator=(const FileSink&); // hide
+};
+
+
+
+} // namespace
+
+#endif // TAO_CRYPT_FILE_HPP
-- 
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