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120 lines
3.9 KiB
C++
120 lines
3.9 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Maintenance service base code.
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*
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* The Initial Developer of the Original Code is
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* Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2011
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Brian R. Bondy <netzen@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "servicebase.h"
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#include "nsWindowsHelpers.h"
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// Shared code between applications and updater.exe
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#include "nsWindowsRestart.cpp"
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/**
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* Verifies if 2 files are byte for byte equivalent.
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*
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* @param file1Path The first file to verify.
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* @param file2Path The second file to verify.
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* @param sameContent Out parameter, TRUE if the files are equal
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* @return TRUE If there was no error checking the files.
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*/
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BOOL
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VerifySameFiles(LPCWSTR file1Path, LPCWSTR file2Path, BOOL &sameContent)
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{
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sameContent = FALSE;
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nsAutoHandle file1(CreateFileW(file1Path, GENERIC_READ, FILE_SHARE_READ,
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NULL, OPEN_EXISTING, 0, NULL));
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if (!file1) {
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return FALSE;
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}
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nsAutoHandle file2(CreateFileW(file2Path, GENERIC_READ, FILE_SHARE_READ,
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NULL, OPEN_EXISTING, 0, NULL));
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if (!file2) {
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return FALSE;
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}
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DWORD fileSize1 = GetFileSize(file1, NULL);
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DWORD fileSize2 = GetFileSize(file2, NULL);
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if (INVALID_FILE_SIZE == fileSize1 || INVALID_FILE_SIZE == fileSize2) {
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return FALSE;
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}
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if (fileSize1 != fileSize2) {
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// sameContent is already set to FALSE
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return TRUE;
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}
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char buf1[COMPARE_BLOCKSIZE];
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char buf2[COMPARE_BLOCKSIZE];
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DWORD numBlocks = fileSize1 / COMPARE_BLOCKSIZE;
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DWORD leftOver = fileSize1 % COMPARE_BLOCKSIZE;
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DWORD readAmount;
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for (DWORD i = 0; i < numBlocks; i++) {
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if (!ReadFile(file1, buf1, COMPARE_BLOCKSIZE, &readAmount, NULL) ||
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readAmount != COMPARE_BLOCKSIZE) {
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return FALSE;
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}
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if (!ReadFile(file2, buf2, COMPARE_BLOCKSIZE, &readAmount, NULL) ||
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readAmount != COMPARE_BLOCKSIZE) {
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return FALSE;
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}
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if (memcmp(buf1, buf2, COMPARE_BLOCKSIZE)) {
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// sameContent is already set to FALSE
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return TRUE;
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}
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}
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if (leftOver) {
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if (!ReadFile(file1, buf1, leftOver, &readAmount, NULL) ||
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readAmount != leftOver) {
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return FALSE;
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}
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if (!ReadFile(file2, buf2, leftOver, &readAmount, NULL) ||
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readAmount != leftOver) {
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return FALSE;
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}
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if (memcmp(buf1, buf2, leftOver)) {
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// sameContent is already set to FALSE
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return TRUE;
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}
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}
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sameContent = TRUE;
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return TRUE;
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}
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