WIP

Src/CompareEngines/ByteComparator.cpp

@@ -340,6 +340,8 @@
 			}
 			else // don't skip blank lines, but still ignore eol difference
 			{
+				const char* ptr0b = ptr0;
+				const char* ptr1b = ptr1;
 				HandleSide0Eol((char **) &ptr0, end0, eof0);
 				HandleSide1Eol((char **) &ptr1, end1, eof1);
 
@@ -353,6 +355,8 @@
 					if ((!m_eol0 || !m_eol1) && (orig0 == end0 || orig1 == end1))
 					{
 						// one side had an end-of-line, but the other didn't
+						ptr0 = ptr0b;
+						ptr1 = ptr1b;
 						result = RESULT_DIFF;
 						goto exit;
 					}

Src/CompareEngines/ByteCompare.cpp

@@ -80,6 +80,7 @@
 	// because transform code converted any UCS-2 files to UTF-8
 	// We could compare directly in UCS-2LE here, as an optimization, in that case
 	char buff[2][WMCMPBUFF]; // buffered access to files
+	std::string lasteol[2];
 	int i;
 	unsigned diffcode = 0;
 
@@ -126,11 +127,23 @@
 				if (rtn < space)
 					eof[i] = true;
 				bfend[i] += rtn;
+				if (m_pOptions->m_bIgnoreEofNewlinePresence)
+				{
+					for (int64_t j = (std::max)(bfstart[i], bfend[i] - 4); j < bfend[i]; ++j)
+					{
+						const char c = buff[i][j];
+						if (c == '\r' || c == '\n')
+							lasteol[i].push_back(c);
+						else
+							lasteol[i].clear();
+					}
+				}
 				if (diffData->m_inf[0].desc == diffData->m_inf[1].desc)
 				{
 					bfstart[1] = bfstart[0];
 					bfend[1] = bfend[0];
 					eof[1] = eof[0];
+					lasteol[1] = lasteol[0];
 					diffData->m_FileLocation[1] = diffData->m_FileLocation[0];
 					memcpy(&buff[1][bfend[1] - rtn], &buff[0][bfend[0] - rtn], rtn);
 					break;
@@ -165,7 +178,21 @@
 			}
 			else
 			{
-				diffcode |= DIFFCODE::DIFF;
+				if (m_pOptions->m_bIgnoreEofNewlinePresence)
+				{
+					if ((eof[0] || eof[1]) &&
+						((end0 - ptr0 <= 1 && (lasteol[0] == "\r" || lasteol[0] == "\n" || lasteol[0] == "\r\n") && (end1 == ptr1))) ||
+						((end0 - ptr0 == 2 && (lasteol[0] == "\r\n") && (end1 == ptr1))) ||
+						((end1 - ptr1 <= 1 && (lasteol[1] == "\r" || lasteol[1] == "\n" || lasteol[1] == "\r\n") && (end0 == ptr0))) ||
+						((end1 - ptr1 == 2 && (lasteol[1] == "\r\n") && (end0 == ptr0))))
+						;
+					else
+						diffcode |= DIFFCODE::DIFF;
+				}
+				else
+				{
+					diffcode |= DIFFCODE::DIFF;
+				}
 				ptr0 = end0;
 				ptr1 = end1;
 				// move our current pointers over what we just compared

Src/CompareOptions.cpp

@@ -20,6 +20,7 @@ CompareOptions::CompareOptions()
 , m_bIgnoreCase(false)
 , m_bIgnoreEOLDifference(false)
 , m_bIgnoreNumbers(false)
+, m_bIgnoreEofNewlinePresence(false)
 {
 }
 
@@ -95,6 +96,7 @@ void DiffutilsOptions::SetFromDiffOptions(const DIFFOPTIONS & options)
 	CompareOptions::SetFromDiffOptions(options);
 	m_bCompletelyBlankOutIgnoredDiffereneces = options.bCompletelyBlankOutIgnoredChanges;
 	m_filterCommentsLines = options.bFilterCommentsLines;
+	m_bIgnoreEofNewlinePresence = options.bIgnoreEofNewlinePresence;
 	m_bIndentHeuristic = options.bIndentHeuristic;
 	switch (options.nDiffAlgorithm)
 	{

Src/CompareOptions.h

@@ -87,6 +87,7 @@ struct DIFFOPTIONS
 	bool bFilterCommentsLines; /**< Ignore Multiline comments differences -option. */
 	bool bIndentHeuristic; /**< Ident heuristic -option */
 	bool bCompletelyBlankOutIgnoredChanges;
+	bool bIgnoreEofNewlinePresence; /**< Ignore EOF newline presence -option. */
 };
 
 /**
@@ -105,6 +106,7 @@ class CompareOptions
 	bool m_bIgnoreCase; /**< Ignore case differences? */
 	bool m_bIgnoreNumbers; /**< Ignore number differences? */
 	bool m_bIgnoreEOLDifference; /**< Ignore EOL style differences? */
+	bool m_bIgnoreEofNewlinePresence; /**< Ignore EOF newline presence */
 };
 
 /**

Src/MainFrm.cpp

@@ -317,6 +317,8 @@ BEGIN_MESSAGE_MAP(CMainFrame, CMDIFrameWnd)
 	ON_UPDATE_COMMAND_UI(ID_DIFF_OPTIONS_IGNORE_CODEPAGE, OnUpdateDiffIgnoreCP)
 	ON_COMMAND(ID_DIFF_OPTIONS_IGNORE_COMMENTS, OnDiffIgnoreComments)
 	ON_UPDATE_COMMAND_UI(ID_DIFF_OPTIONS_IGNORE_COMMENTS, OnUpdateDiffIgnoreComments)
+	ON_COMMAND(ID_DIFF_OPTIONS_IGNORE_EOF_NEWLINE_PRESENCE, OnDiffIgnoreEofNewlinePresence)
+	ON_UPDATE_COMMAND_UI(ID_DIFF_OPTIONS_IGNORE_EOF_NEWLINE_PRESENCE, OnUpdateDiffIgnoreEofNewlinePresence)
 	ON_COMMAND(ID_DIFF_OPTIONS_INCLUDE_SUBFOLDERS, OnIncludeSubfolders)
 	ON_UPDATE_COMMAND_UI(ID_DIFF_OPTIONS_INCLUDE_SUBFOLDERS, OnUpdateIncludeSubfolders)
 	ON_COMMAND_RANGE(ID_DIFF_OPTIONS_COMPMETHOD_FULL_CONTENTS, ID_DIFF_OPTIONS_COMPMETHOD_SIZE, OnCompareMethod)
@@ -3217,6 +3219,18 @@ void CMainFrame::OnUpdateDiffIgnoreComments(CCmdUI* pCmdUI)
 	pCmdUI->Enable();
 }
 
+void CMainFrame::OnDiffIgnoreEofNewlinePresence()
+{
+	GetOptionsMgr()->SaveOption(OPT_CMP_IGNORE_EOF_NEWLINE_PRESENCE, !GetOptionsMgr()->GetBool(OPT_CMP_IGNORE_EOF_NEWLINE_PRESENCE));
+	ApplyDiffOptions();
+}
+
+void CMainFrame::OnUpdateDiffIgnoreEofNewlinePresence(CCmdUI* pCmdUI)
+{
+	pCmdUI->SetCheck(GetOptionsMgr()->GetBool(OPT_CMP_IGNORE_EOF_NEWLINE_PRESENCE));
+	pCmdUI->Enable();
+}
+
 void CMainFrame::OnIncludeSubfolders()
 {
 	GetOptionsMgr()->SaveOption(OPT_CMP_INCLUDE_SUBDIRS, !GetOptionsMgr()->GetBool(OPT_CMP_INCLUDE_SUBDIRS));

Src/MainFrm.h

@@ -413,6 +413,8 @@ class CMainFrame : public CMDIFrameWnd
 	afx_msg void OnUpdateDiffIgnoreCP(CCmdUI* pCmdUI);
 	afx_msg void OnDiffIgnoreComments();
 	afx_msg void OnUpdateDiffIgnoreComments(CCmdUI* pCmdUI);
+	afx_msg void OnDiffIgnoreEofNewlinePresence();
+	afx_msg void OnUpdateDiffIgnoreEofNewlinePresence(CCmdUI* pCmdUI);
 	afx_msg void OnIncludeSubfolders();
 	afx_msg void OnUpdateIncludeSubfolders(CCmdUI* pCmdUI);
 	afx_msg void OnCompareMethod(UINT nID);

Src/Merge.rc

@@ -1093,6 +1093,7 @@ BEGIN
         MENUITEM "Ignore codepage &differences", ID_DIFF_OPTIONS_IGNORE_CODEPAGE
         MENUITEM "Ignore num&bers",             IDC_DIFF_IGNORENUMBERS
         MENUITEM "Ignore c&omment differences", ID_DIFF_OPTIONS_IGNORE_COMMENTS
+        MENUITEM "Ignore &end-of-file newline presence", ID_DIFF_OPTIONS_IGNORE_EOF_NEWLINE_PRESENCE
         MENUITEM SEPARATOR
         MENUITEM "&Include subfolders",         ID_DIFF_OPTIONS_INCLUDE_SUBFOLDERS
         POPUP "&Compare method:"
@@ -1123,6 +1124,7 @@ BEGIN
         MENUITEM "Ignore codepage &differences", ID_PROJECT_DIFF_OPTIONS_IGNORE_CODEPAGE
         MENUITEM "Ignore num&bers",             ID_PROJECT_DIFF_OPTIONS_IGNORE_NUMBERS
         MENUITEM "Ignore c&omment differences", ID_PROJECT_DIFF_OPTIONS_IGNORE_COMMENTS
+        MENUITEM "Ignore &end-of-file newline presence", ID_PROJECT_DIFF_OPTIONS_IGNORE_EOF_NEWLINE_PRESENCE
         MENUITEM SEPARATOR
         POPUP "&Compare method:"
         BEGIN
@@ -1952,14 +1954,16 @@ BEGIN
     CONTROL         "Ignore codepage &differences",IDC_CP_SENSITIVE,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,7,108,269,10
     CONTROL         "Ignore c&omment differences",IDC_FILTERCOMMENTS_CHECK,
                     "Button",BS_AUTOCHECKBOX | WS_TABSTOP,7,120,239,10
-    CONTROL         "E&nable moved block detection",IDC_MOVED_BLOCKS,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,7,132,269,10
-    CONTROL         "Align &similar lines",IDC_ALIGN_SIMILAR_LINES,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,7,144,269,10
-    LTEXT           "Diff &algorithm:",IDC_STATIC,7,156,269,10
-    COMBOBOX        IDC_DIFF_ALGORITHM,6,168,270,70,CBS_DROPDOWNLIST | WS_VSCROLL | WS_TABSTOP
-    CONTROL         "Enable indent &heuristic",IDC_INDENT_HEURISTIC,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,7,186,269,10
+    CONTROL         "Ignore &end-of-file newline presence",IDC_IGNEOFEOL_CHECK,
+                    "Button",BS_AUTOCHECKBOX | WS_TABSTOP,7,132,239,10
+    CONTROL         "E&nable moved block detection",IDC_MOVED_BLOCKS,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,7,144,269,10
+    CONTROL         "Align &similar lines",IDC_ALIGN_SIMILAR_LINES,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,7,156,269,10
+    LTEXT           "Diff &algorithm:",IDC_STATIC,7,168,269,10
+    COMBOBOX        IDC_DIFF_ALGORITHM,6,180,270,70,CBS_DROPDOWNLIST | WS_VSCROLL | WS_TABSTOP
+    CONTROL         "Enable indent &heuristic",IDC_INDENT_HEURISTIC,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,7,198,269,10
     CONTROL         "Completely unhighlight the ignored differences",IDC_COMPLETELY_BLANK_OUT_IGNORED_DIFFERENCES,
-                    "Button",BS_AUTOCHECKBOX | WS_TABSTOP,7,198,269,10
-    PUSHBUTTON      "Defaults",IDC_COMPARE_DEFAULTS,191,228,88,14
+                    "Button",BS_AUTOCHECKBOX | WS_TABSTOP,7,210,269,10
+    PUSHBUTTON      "Defaults",IDC_COMPARE_DEFAULTS,191,240,88,14
 END
 
 IDD_PROPPAGE_EDITOR DIALOGEX 0, 0, 285, 242

Src/OpenView.cpp

@@ -86,6 +86,8 @@ BEGIN_MESSAGE_MAP(COpenView, CFormView)
 	ON_UPDATE_COMMAND_UI(ID_PROJECT_DIFF_OPTIONS_IGNORE_CODEPAGE, OnUpdateDiffIgnoreCP)
 	ON_COMMAND(ID_PROJECT_DIFF_OPTIONS_IGNORE_COMMENTS, OnDiffIgnoreComments)
 	ON_UPDATE_COMMAND_UI(ID_PROJECT_DIFF_OPTIONS_IGNORE_COMMENTS, OnUpdateDiffIgnoreComments)
+	ON_COMMAND(ID_PROJECT_DIFF_OPTIONS_IGNORE_EOF_NEWLINE_PRESENCE, OnDiffIgnoreEofNewlinePresence)
+	ON_UPDATE_COMMAND_UI(ID_PROJECT_DIFF_OPTIONS_IGNORE_EOF_NEWLINE_PRESENCE, OnUpdateDiffIgnoreEofNewlinePresence)
 	ON_COMMAND_RANGE(ID_PROJECT_DIFF_OPTIONS_COMPMETHOD_FULL_CONTENTS, ID_PROJECT_DIFF_OPTIONS_COMPMETHOD_SIZE, OnCompareMethod)
 	ON_UPDATE_COMMAND_UI_RANGE(ID_PROJECT_DIFF_OPTIONS_COMPMETHOD_FULL_CONTENTS, ID_PROJECT_DIFF_OPTIONS_COMPMETHOD_SIZE, OnUpdateCompareMethod)
 	ON_WM_ACTIVATE()
@@ -876,6 +878,8 @@ void COpenView::OnLoadProject()
 			m_bIgnoreNumbers = projItem.GetIgnoreNumbers();
 		if (projItem.HasIgnoreCodepage())
 			m_bIgnoreCodepage = projItem.GetIgnoreCodepage();
+		if (projItem.HasIgnoreEofNewlinePresence())
+			m_bIgnoreEofNewlinePresence = projItem.GetIgnoreEofNewlinePresence();
 		if (projItem.HasFilterCommentsLines())
 			m_bFilterCommentsLines = projItem.GetFilterCommentsLines();
 		if (projItem.HasCompareMethod())
@@ -921,6 +925,7 @@ void COpenView::OnSaveProject()
 	projItem.SetSaveIgnoreEol(bSaveCompareOptions);
 	projItem.SetSaveIgnoreNumbers(bSaveCompareOptions);
 	projItem.SetSaveIgnoreCodepage(bSaveCompareOptions);
+	projItem.SetSaveIgnoreEofNewlinePresence(bSaveCompareOptions);
 	projItem.SetSaveFilterCommentsLines(bSaveCompareOptions);
 	projItem.SetSaveCompareMethod(bSaveCompareOptions);
 	projItem.SetSaveHiddenItems(bSaveHiddenItems);
@@ -986,6 +991,7 @@ void COpenView::OnSaveProject()
 		projItem.SetIgnoreEol(m_bIgnoreEol);
 		projItem.SetIgnoreNumbers(m_bIgnoreNumbers);
 		projItem.SetIgnoreCodepage(m_bIgnoreCodepage);
+		projItem.SetIgnoreEofNewlinePresence(m_bIgnoreEofNewlinePresence);
 		projItem.SetFilterCommentsLines(m_bFilterCommentsLines);
 		projItem.SetCompareMethod(m_nCompareMethod);
 	}
@@ -1614,6 +1620,23 @@ void COpenView::OnUpdateDiffIgnoreComments(CCmdUI* pCmdUI)
 	pCmdUI->SetCheck(m_bFilterCommentsLines);
 }
 
+/**
+ * @brief Toggle "Ignore EOF newline presence" setting.
+ */
+void COpenView::OnDiffIgnoreEofNewlinePresence()
+{
+	m_bIgnoreEofNewlinePresence = !m_bIgnoreEofNewlinePresence;
+}
+
+/**
+ * @brief Update "Ignore EOF newline presence" state.
+ * @param [in] pCmdUI UI component to update.
+ */
+void COpenView::OnUpdateDiffIgnoreEofNewlinePresence(CCmdUI* pCmdUI)
+{
+	pCmdUI->SetCheck(m_bIgnoreEofNewlinePresence);
+}
+
 /**
  * @brief Set "Compare method" setting.
  * @param [in] nID Menu ID of the selected item

Src/OpenView.h

@@ -90,6 +90,7 @@ class COpenView : public CFormView, public DlgUtils<COpenView>
 	bool m_bIgnoreNumbers; /**< The value of the "Ignore numbers" setting */
 	bool m_bIgnoreCodepage; /**< The value of the "Ignore codepage differences" setting */
 	bool m_bFilterCommentsLines; /**< The value of the "Ignore comment differences" setting */
+	bool m_bIgnoreEofNewlinePresence; /**< The value of the "Ignore EOF newline presence" setting */
 	int m_nCompareMethod; /**< The value of the "Compare method" setting */
 // Overrides
 	public:
@@ -149,6 +150,8 @@ virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
 	afx_msg void OnUpdateDiffIgnoreCP(CCmdUI* pCmdUI);
 	afx_msg void OnDiffIgnoreComments();
 	afx_msg void OnUpdateDiffIgnoreComments(CCmdUI* pCmdUI);
+	afx_msg void OnDiffIgnoreEofNewlinePresence();
+	afx_msg void OnUpdateDiffIgnoreEofNewlinePresence(CCmdUI* pCmdUI);
 	afx_msg void OnCompareMethod(UINT nID);
 	afx_msg void OnUpdateCompareMethod(CCmdUI* pCmdUI);
 	afx_msg void OnActivate(UINT nState, CWnd* pWndOther, BOOL bMinimized);

Src/OptionsDef.h

@@ -212,6 +212,7 @@ inline const String OPT_CMP_IGNORE_CASE {_T("Settings/IgnoreCase"s)};
 inline const String OPT_CMP_IGNORE_NUMBERS {_T("Settings/IgnoreNumbers"s)};
 inline const String OPT_CMP_IGNORE_EOL {_T("Settings/IgnoreEol"s)};
 inline const String OPT_CMP_IGNORE_CODEPAGE {_T("Settings/IgnoreCodepage"s)};
+inline const String OPT_CMP_IGNORE_EOF_NEWLINE_PRESENCE {_T("Settings/IgnoreEOFNewlinePresence"s)};
 inline const String OPT_CMP_METHOD {_T("Settings/CompMethod2"s)};
 inline const String OPT_CMP_MOVED_BLOCKS {_T("Settings/MovedBlocks"s)};
 inline const String OPT_CMP_ALIGN_SIMILAR_LINES {_T("Settings/MatchSimilarLines"s)};

Src/OptionsDiffOptions.cpp

@@ -25,6 +25,7 @@ void Init(COptionsMgr *pOptionsMgr)
 	pOptionsMgr->InitOption(OPT_CMP_DIFF_ALGORITHM, (int)0, 0, 4);
 	pOptionsMgr->InitOption(OPT_CMP_INDENT_HEURISTIC, true);
 	pOptionsMgr->InitOption(OPT_CMP_COMPLETELY_BLANK_OUT_IGNORED_CHANGES, false);
+	pOptionsMgr->InitOption(OPT_CMP_IGNORE_EOF_NEWLINE_PRESENCE, false);
 }
 
 void Load(const COptionsMgr *pOptionsMgr, DIFFOPTIONS& options)
@@ -36,6 +37,7 @@ void Load(const COptionsMgr *pOptionsMgr, DIFFOPTIONS& options)
 	options.bIgnoreCase = pOptionsMgr->GetBool(OPT_CMP_IGNORE_CASE);
 	options.bIgnoreNumbers = pOptionsMgr->GetBool(OPT_CMP_IGNORE_NUMBERS);
 	options.bIgnoreEol = pOptionsMgr->GetBool(OPT_CMP_IGNORE_EOL);
+	options.bIgnoreEofNewlinePresence = pOptionsMgr->GetBool(OPT_CMP_IGNORE_EOF_NEWLINE_PRESENCE);
 	options.bIndentHeuristic = pOptionsMgr->GetBool(OPT_CMP_INDENT_HEURISTIC);
 	options.bCompletelyBlankOutIgnoredChanges = pOptionsMgr->GetBool(OPT_CMP_COMPLETELY_BLANK_OUT_IGNORED_CHANGES);
 }
@@ -49,6 +51,7 @@ void Save(COptionsMgr *pOptionsMgr, const DIFFOPTIONS& options)
 	pOptionsMgr->SaveOption(OPT_CMP_IGNORE_CASE, options.bIgnoreCase);
 	pOptionsMgr->SaveOption(OPT_CMP_IGNORE_NUMBERS, options.bIgnoreNumbers);
 	pOptionsMgr->SaveOption(OPT_CMP_IGNORE_EOL, options.bIgnoreEol);
+	pOptionsMgr->SaveOption(OPT_CMP_IGNORE_EOF_NEWLINE_PRESENCE, options.bIgnoreEofNewlinePresence);
 	pOptionsMgr->SaveOption(OPT_CMP_INDENT_HEURISTIC, options.bIndentHeuristic);
 	pOptionsMgr->SaveOption(OPT_CMP_COMPLETELY_BLANK_OUT_IGNORED_CHANGES, options.bCompletelyBlankOutIgnoredChanges);
 }