qmake: teach findMocs to handle backslash-newline gracefully.

Change-Id: Id71352c0cf71ab84bd81d4f3d11bb19dc7965903
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>

qmake/generators/makefiledeps.cpp

@@ -902,13 +902,24 @@ bool QMakeSourceFileInfo::findMocs(SourceFile *file)
  /* qmake ignore Q_GADGET */
  /* qmake ignore Q_OBJECT */
     for(int x = 0; x < buffer_len; x++) {
+#define SKIP_BSNL(pos) skipEscapedLineEnds(buffer, buffer_len, (pos), &line_count)
+        x = SKIP_BSNL(x);
         if (buffer[x] == '/') {
-            ++x;
+            int extralines = 0;
-            if(buffer_len >= x) {
+            int y = skipEscapedLineEnds(buffer, buffer_len, x + 1, &extralines);
-                if (buffer[x] == '/') { // C++-style comment
+            if (buffer_len > y) {
-                    for (; x < buffer_len && !qmake_endOfLine(buffer[x]); ++x) {} // skip
+                // If comment, advance to the character that ends it:
-                } else if (buffer[x] == '*') { // C-style comment
+                if (buffer[y] == '/') { // C++-style comment
-                    for(++x; x < buffer_len; ++x) {
+                    line_count += extralines;
+                    x = y;
+                    do {
+                        x = SKIP_BSNL(x + 1);
+                    } while (x < buffer_len && !qmake_endOfLine(buffer[x]));
+
+                } else if (buffer[y] == '*') { // C-style comment
+                    line_count += extralines;
+                    x = SKIP_BSNL(y + 1);
+                    for (; x < buffer_len; x = SKIP_BSNL(x + 1)) {
                         if (buffer[x] == 't' || buffer[x] == 'q') { // ignore
                             if(buffer_len >= (x + 20) &&
                                !strncmp(buffer + x + 1, "make ignore Q_OBJECT", 20)) {
@@ -924,58 +935,58 @@ bool QMakeSourceFileInfo::findMocs(SourceFile *file)
                                 ignore_qgadget = true;
                             }
                         } else if (buffer[x] == '*') {
-                            if (buffer_len >= x + 1 && buffer[x + 1] == '/') {
+                            extralines = 0;
-                                ++x;
+                            y = skipEscapedLineEnds(buffer, buffer_len, x + 1, &extralines);
+                            if (buffer_len > y && buffer[y] == '/') {
+                                line_count += extralines;
+                                x = y;
                                 break;
                             }
                         } else if (Option::debug_level && qmake_endOfLine(buffer[x])) {
                             ++line_count;
                         }
                     }
-                } else { // not a comment, in fact; undo the extra x++ we did.
-                    x--;
                 }
+                // else: don't update x, buffer[x] is just the division operator.
             }
         } else if (buffer[x] == '\'' || buffer[x] == '"') {
             x = scanPastString(buffer, buffer_len, x, &line_count);
             // Leaves us on closing quote; for loop's x++ steps us past it.
         }
 
-        if (Option::debug_level && qmake_endOfLine(buffer[x]))
+        if (x < buffer_len && Option::debug_level && qmake_endOfLine(buffer[x]))
             ++line_count;
-        if (buffer_len > x + 2 && buffer[x + 1] == 'Q' &&
+        if (buffer_len > x + 8 && !isCWordChar(buffer[x])) {
-            buffer[x + 2] == '_' && !isCWordChar(buffer[x])) {
+            int morelines = 0;
-            ++x;
+            int y = skipEscapedLineEnds(buffer, buffer_len, x + 1, &morelines);
-            int match = 0;
+            if (buffer[y] == 'Q') {
-            static const char *interesting[] = { "OBJECT", "GADGET" };
+                static const char interesting[][9] = { "Q_OBJECT", "Q_GADGET" };
-            for (int interest = 0, m1, m2; interest < 2; ++interest) {
+                for (int interest = 0; interest < 2; ++interest) {
                 if(interest == 0 && ignore_qobject)
                     continue;
                 else if(interest == 1 && ignore_qgadget)
                     continue;
-                for (m1 = 0, m2 = 0; interesting[interest][m1]; ++m1) {
+
-                    if (interesting[interest][m1] != buffer[x + 2 + m1]) {
+                    int matchlen = 0, extralines = 0;
-                        m2 = -1;
+                    if (matchWhileUnsplitting(buffer, buffer_len, y,
-                        break;
+                                              interesting[interest],
+                                              strlen(interesting[interest]),
+                                              &matchlen, &extralines)
+                        && y + matchlen < buffer_len
+                        && !isCWordChar(buffer[y + matchlen])) {
+                        if (Option::debug_level) {
+                            buffer[y + matchlen] = '\0';
+                            debug_msg(2, "Mocgen: %s:%d Found MOC symbol %s",
+                                      file->file.real().toLatin1().constData(),
+                                      line_count + morelines, buffer + y);
+                        }
+                        file->mocable = true;
+                        return true;
                     }
-                    ++m2;
                 }
-                if(m1 == m2) {
-                    match = m2 + 2;
-                    break;
-                }
-            }
-            if (match && !isCWordChar(buffer[x + match])) {
-                if (Option::debug_level) {
-                    buffer[x + match] = '\0';
-                    debug_msg(2, "Mocgen: %s:%d Found MOC symbol %s",
-                              file->file.real().toLatin1().constData(),
-                              line_count, buffer + x);
-                }
-                file->mocable = true;
-                return true;
             }
         }
+#undef SKIP_BSNL
     }
     return true;
 }

tests/auto/tools/qmake/testdata/findMocs/findMocs.pro

@@ -1,4 +1,5 @@
 DESTDIR	= ./
 
-HEADERS += object1.h object2.h object3.h object4.h object5.h object6.h object7.h
+HEADERS += object1.h object2.h object3.h object4.h \
+        object5.h object6.h object7.h object8.h object9.h
 SOURCES += main.cpp

tests/auto/tools/qmake/testdata/findMocs/main.cpp

@@ -39,6 +39,7 @@
 #include <moc_object5.cpp>
 #include <moc_object6.cpp>
 #include <moc_object7.cpp>
+#include     "object8.h"
+#include <moc_object9.cpp>
 
-int main () {}
+int main() { return 0; }
-

tests/auto/tools/qmake/testdata/findMocs/object1.h

@@ -37,6 +37,6 @@
 
 class Object1 : public QObject
 {
-    Q_OBJECT
+    Q\
+_OBJECT
 };
-

tests/auto/tools/qmake/testdata/findMocs/object2.h

@@ -36,6 +36,6 @@
 
 class Object2 : public QObject
 {
-    Q_OBJECT
+    Q_\
+OBJECT
 };
-

tests/auto/tools/qmake/testdata/findMocs/object3.h

@@ -37,6 +37,6 @@
 
 class Object3 : public QObject
 {
-    Q_OBJECT
+    Q_OBJ\
+ECT
 };
-

tests/auto/tools/qmake/testdata/findMocs/object4.h

@@ -44,10 +44,9 @@ class Object4 : public QObject
 Comment ends there --> /*/
 
 // Now we poison moc, just to make sure this doesn't get moc'ed :)
-class NonMocObject
+class NonMocObject4
 /*  : QObject */
 {
     /* qmake ignore Q_OBJECT */
     Q_OBJECT
 };
-

tests/auto/tools/qmake/testdata/findMocs/object8.h

@@ -0,0 +1,50 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file. Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** As a special exception, The Qt Company gives you certain additional
+** rights. These rights are described in The Qt Company LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include <QObject>
+#define Q_OBJECTOID_THING // empty
+
+class Object8 : public QObject
+{
+    Q_OBJECT\
+OID_THING
+};
+
+// Now we poison moc, just to make sure this doesn't get moc'ed :)
+class NonMocObject8
+/*  : QObject */
+{
+    /* qmake ignore Q_OBJECT */
+    Q_OBJECT
+};

tests/auto/tools/qmake/testdata/findMocs/object9.h

@@ -0,0 +1,41 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file. Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** As a special exception, The Qt Company gives you certain additional
+** rights. These rights are described in The Qt Company LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include <QObject>
+#define juxtaposed "lorem ""ipsum /*"
+
+class Object9 : public QObject
+{
+    Q_OBJECT
+};