1 files changed, 114 insertions, 0 deletions
diff --git a/src/tools/qdoc/editdistance.cpp b/src/tools/qdoc/editdistance.cpp
new file mode 100644
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+++ b/src/tools/qdoc/editdistance.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the tools applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*
+  editdistance.cpp
+*/
+
+#include "editdistance.h"
+
+QT_BEGIN_NAMESPACE
+
+int editDistance( const QString& s, const QString& t )
+{
+#define D( i, j ) d[(i) * n + (j)]
+    int i;
+    int j;
+    int m = s.length() + 1;
+    int n = t.length() + 1;
+    int *d = new int[m * n];
+    int result;
+
+    for ( i = 0; i < m; i++ )
+        D( i, 0 ) = i;
+    for ( j = 0; j < n; j++ )
+        D( 0, j ) = j;
+    for ( i = 1; i < m; i++ ) {
+        for ( j = 1; j < n; j++ ) {
+            if ( s[i - 1] == t[j - 1] ) {
+                D( i, j ) = D( i - 1, j - 1 );
+            } else {
+                int x = D( i - 1, j );
+                int y = D( i - 1, j - 1 );
+                int z = D( i, j - 1 );
+                D( i, j ) = 1 + qMin( qMin(x, y), z );
+            }
+        }
+    }
+    result = D( m - 1, n - 1 );
+    delete[] d;
+    return result;
+#undef D
+}
+
+QString nearestName( const QString& actual, const QSet<QString>& candidates )
+{
+    if (actual.isEmpty())
+        return "";
+
+    int deltaBest = 10000;
+    int numBest = 0;
+    QString best;
+
+    QSet<QString>::ConstIterator c = candidates.begin();
+    while ( c != candidates.end() ) {
+        if ( (*c)[0] == actual[0] ) {
+            int delta = editDistance( actual, *c );
+            if ( delta < deltaBest ) {
+                deltaBest = delta;
+                numBest = 1;
+                best = *c;
+            } else if ( delta == deltaBest ) {
+                numBest++;
+            }
+        }
+        ++c;
+    }
+
+    if ( numBest == 1 && deltaBest <= 2 &&
+         actual.length() + best.length() >= 5 ) {
+        return best;
+    } else {
+        return "";
+    }
+}
+
+QT_END_NAMESPACE