1 files changed, 122 insertions, 0 deletions
diff --git a/library/binary.cpp b/library/binary.cpp
new file mode 100644
index 00000000..bc5ba814
--- /dev/null
+++ b/library/binary.cpp
@@ -0,0 +1,122 @@
+// **************************************************************************
+// * 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) 2008-2010 ZenJu (zhnmju123 AT gmx.de)                    *
+// **************************************************************************
+//
+#include "binary.h"
+#include <boost/scoped_array.hpp>
+#include <wx/intl.h>
+#include "../shared/stringConv.h"
+
+#ifdef FFS_WIN
+#include "../shared/longPathPrefix.h"
+#include <wx/msw/wrapwin.h> //includes "windows.h"
+#include <boost/shared_ptr.hpp>
+
+#elif defined FFS_LINUX
+#include <wx/ffile.h>
+#endif
+
+
+bool FreeFileSync::filesHaveSameContent(const Zstring& filename1, const Zstring& filename2, CompareCallback* callback)
+{
+    const size_t BUFFER_SIZE = 512 * 1024; //512 kb seems to be the perfect buffer size
+    static boost::scoped_array<unsigned char> memory1(new unsigned char[BUFFER_SIZE]);
+    static boost::scoped_array<unsigned char> memory2(new unsigned char[BUFFER_SIZE]);
+
+#ifdef FFS_WIN
+    const HANDLE hFile1 = ::CreateFile(FreeFileSync::applyLongPathPrefix(filename1).c_str(),
+                                       GENERIC_READ,
+                                       FILE_SHARE_READ,
+                                       NULL,
+                                       OPEN_EXISTING,
+                                       FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_SEQUENTIAL_SCAN,
+                                       NULL);
+    if (hFile1 == INVALID_HANDLE_VALUE)
+        throw FileError(wxString(_("Error opening file:")) + wxT(" \"") + zToWx(filename1) + wxT("\""));
+
+    boost::shared_ptr<void> dummy1(hFile1, &::CloseHandle);
+
+    const HANDLE hFile2 = ::CreateFile(FreeFileSync::applyLongPathPrefix(filename2).c_str(),
+                                       GENERIC_READ,
+                                       FILE_SHARE_READ,
+                                       NULL,
+                                       OPEN_EXISTING,
+                                       FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_SEQUENTIAL_SCAN,
+                                       NULL);
+    if (hFile2 == INVALID_HANDLE_VALUE)
+        throw FileError(wxString(_("Error opening file:")) + wxT(" \"") + zToWx(filename2) + wxT("\""));
+
+    boost::shared_ptr<void> dummy2(hFile2, &::CloseHandle);
+
+    wxLongLong bytesCompared;
+    DWORD length1 = 0;
+    do
+    {
+        if (!::ReadFile(
+                    hFile1,        //__in         HANDLE hFile,
+                    memory1.get(), //__out        LPVOID lpBuffer,
+                    BUFFER_SIZE,   //__in         DWORD nNumberOfBytesToRead,
+                    &length1,      //__out_opt    LPDWORD lpNumberOfBytesRead,
+                    NULL))         //__inout_opt  LPOVERLAPPED lpOverlapped
+            throw FileError(wxString(_("Error reading file:")) + wxT(" \"") + zToWx(filename1) + wxT("\""));
+
+        DWORD length2 = 0;
+        if (!::ReadFile(
+                    hFile2,        //__in         HANDLE hFile,
+                    memory2.get(), //__out        LPVOID lpBuffer,
+                    BUFFER_SIZE,   //__in         DWORD nNumberOfBytesToRead,
+                    &length2,      //__out_opt    LPDWORD lpNumberOfBytesRead,
+                    NULL))         //__inout_opt  LPOVERLAPPED lpOverlapped
+            throw FileError(wxString(_("Error reading file:")) + wxT(" \"") + zToWx(filename2) + wxT("\""));
+
+        if (length1 != length2 || ::memcmp(memory1.get(), memory2.get(), length1) != 0)
+            return false;
+
+        bytesCompared += length1 * 2;
+
+        //send progress updates
+        callback->updateCompareStatus(bytesCompared);
+    }
+    while (length1 == BUFFER_SIZE);
+
+    return true;
+
+
+#elif defined FFS_LINUX
+    wxFFile file1(::fopen(filename1.c_str(), DefaultStr("rb,type=record,noseek"))); //utilize UTF-8 filename
+    if (!file1.IsOpened())
+        throw FileError(wxString(_("Error opening file:")) + wxT(" \"") + zToWx(filename1) + wxT("\""));
+
+    wxFFile file2(::fopen(filename2.c_str(), DefaultStr("rb,type=record,noseek"))); //utilize UTF-8 filename
+    if (!file2.IsOpened())
+        throw FileError(wxString(_("Error opening file:")) + wxT(" \"") + zToWx(filename2) + wxT("\""));
+
+    wxLongLong bytesCompared;
+    do
+    {
+        const size_t length1 = file1.Read(memory1.get(), BUFFER_SIZE);
+        if (file1.Error())
+            throw FileError(wxString(_("Error reading file:")) + wxT(" \"") + zToWx(filename1) + wxT("\""));
+
+        const size_t length2 = file2.Read(memory2.get(), BUFFER_SIZE);
+        if (file2.Error())
+            throw FileError(wxString(_("Error reading file:")) + wxT(" \"") + zToWx(filename2) + wxT("\""));
+
+        if (length1 != length2 || ::memcmp(memory1.get(), memory2.get(), length1) != 0)
+            return false;
+
+        bytesCompared += length1 * 2;
+
+        //send progress updates
+        callback->updateCompareStatus(bytesCompared);
+    }
+    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;
+#endif
+}