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authorDaniel Wilhelm <daniel@wili.li>2014-04-18 17:15:16 +0200
committerDaniel Wilhelm <daniel@wili.li>2014-04-18 17:15:16 +0200
commitbd6336c629841c6db3a6ca53a936d629d34db53b (patch)
tree3721ef997864108df175ce677a8a7d4342a6f1d2 /library/binary.cpp
parent4.0 (diff)
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4.1
Diffstat (limited to 'library/binary.cpp')
-rw-r--r--library/binary.cpp125
1 files changed, 0 insertions, 125 deletions
diff --git a/library/binary.cpp b/library/binary.cpp
deleted file mode 100644
index 1e043d33..00000000
--- a/library/binary.cpp
+++ /dev/null
@@ -1,125 +0,0 @@
-// **************************************************************************
-// * This file is part of the FreeFileSync project. It is distributed under *
-// * GNU General Public License: http://www.gnu.org/licenses/gpl.html *
-// * Copyright (C) 2008-2011 ZenJu (zhnmju123 AT gmx.de) *
-// **************************************************************************
-
-#include "binary.h"
-#include "../shared/file_io.h"
-#include <vector>
-#include <wx/stopwatch.h>
-#include "../shared/int64.h"
-#include <boost/thread/tss.hpp>
-
-inline
-void setMinSize(std::vector<char>& buffer, size_t minSize)
-{
- if (buffer.size() < minSize) //this is similar to reserve(), but we need a "properly initialized" array here
- buffer.resize(minSize);
-}
-
-
-namespace
-{
-class BufferSize
-{
-public:
- BufferSize() : bufSize(BUFFER_SIZE_START) {}
-
- void inc()
- {
- if (bufSize < BUFFER_SIZE_MAX)
- bufSize *= 2;
- }
-
- void dec()
- {
- if (bufSize > BUFFER_SIZE_MIN)
- bufSize /= 2;
- }
-
- operator size_t() const { return bufSize; }
-
-private:
- static const size_t BUFFER_SIZE_MIN = 128 * 1024;
- static const size_t BUFFER_SIZE_START = 512 * 1024; //512 kb seems to be a reasonable initial buffer size
- static const size_t BUFFER_SIZE_MAX = 16 * 1024 * 1024;
-
- /*Tests on Win7 x64 show that buffer size does NOT matter if files are located on different physical disks!
- Impact of buffer size when files are on same disk:
-
- buffer MB/s
- ------------
- 64 10
- 128 19
- 512 40
- 1024 48
- 2048 56
- 4096 56
- 8192 56
- */
-
- size_t bufSize;
-};
-}
-
-
-bool zen::filesHaveSameContent(const Zstring& filename1, const Zstring& filename2, CompareCallback& callback)
-{
- FileInput file1(filename1); //throw FileError
- FileInput file2(filename2); //throw FileError
-
- static boost::thread_specific_ptr<std::vector<char>> cpyBuf1;
- static boost::thread_specific_ptr<std::vector<char>> cpyBuf2;
- if (!cpyBuf1.get())
- cpyBuf1.reset(new std::vector<char>());
- if (!cpyBuf2.get())
- cpyBuf2.reset(new std::vector<char>());
-
- std::vector<char>& memory1 = *cpyBuf1;
- std::vector<char>& memory2 = *cpyBuf2;
-
- BufferSize bufferSize;
- zen::UInt64 bytesCompared;
-
- wxLongLong lastDelayViolation = wxGetLocalTimeMillis();
-
- do
- {
- setMinSize(memory1, bufferSize);
- setMinSize(memory2, bufferSize);
-
- const wxLongLong startTime = wxGetLocalTimeMillis();
-
- const size_t length1 = file1.read(&memory1[0], bufferSize); //returns actual number of bytes read; throw FileError()
- const size_t length2 = file2.read(&memory2[0], bufferSize); //
-
- const wxLongLong stopTime = wxGetLocalTimeMillis();
-
- //-------- dynamically set buffer size to keep callback interval between 200 - 500ms ---------------------
- const wxLongLong loopTime = stopTime - startTime;
- if (loopTime < 200 && stopTime - lastDelayViolation > 2000) //avoid "flipping back": e.g. DVD-Roms read 32MB at once, so first read may be > 300 ms, but second one will be 0ms!
- {
- lastDelayViolation = stopTime;
- bufferSize.inc(); //practically no costs!
- }
- else if (loopTime > 500)
- {
- lastDelayViolation = stopTime;
- bufferSize.dec(); //
- }
- //------------------------------------------------------------------------------------------------
-
- if (length1 != length2 || ::memcmp(&memory1[0], &memory2[0], length1) != 0)
- return false;
-
- bytesCompared += length1 * 2;
- callback.updateCompareStatus(bytesCompared); //send progress updates
- }
- while (!file1.eof());
-
- if (!file2.eof()) //highly unlikely, but theoretically possible! (but then again, not in this context where both files have same size...)
- return false;
-
- return true;
-}
bgstack15