src/xmlpatterns/data/qbase64binary.cpp
changeset 0 1918ee327afb
child 4 3b1da2848fc7
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/xmlpatterns/data/qbase64binary.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,216 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtXmlPatterns module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QByteArray>
+#include <QtGlobal>
+
+#include "qbuiltintypes_p.h"
+#include "qvalidationerror_p.h"
+
+#include "qbase64binary_p.h"
+
+QT_BEGIN_NAMESPACE
+
+using namespace QPatternist;
+
+Base64Binary::Base64Binary(const QByteArray &val) : m_value(val)
+{
+}
+
+const char Base64Binary::Base64DecMap[128] =
+{
+     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+     0x00, 0x00, 0x00, 0x3E, 0x00, 0x00, 0x00, 0x3F,
+     0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B,
+     0x3C, 0x3D, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+     0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
+     0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E,
+     0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
+     0x17, 0x18, 0x19, 0x00, 0x00, 0x00, 0x00, 0x00,
+     0x00, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20,
+     0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
+     0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30,
+     0x31, 0x32, 0x33, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+void Base64Binary::base64Decode(const QByteArray &in, QByteArray &out, bool &ok)
+{
+    out.resize(0);
+
+    if(in.isEmpty())
+    {
+        ok = false;
+        return;
+    }
+
+    ok = true;
+    int len = in.size(), tail = len;
+    const char *const data = in.data();
+    unsigned int eqCount = 0;
+
+    // Find the tail end of the actual encoded data even if
+    // there is/are trailing CR and/or LF.
+    while(data[tail - 1] == '=')
+    {
+        --tail;
+        if(data[tail] != '=')
+            len = tail;
+        else
+            ++eqCount;
+    }
+
+    if(eqCount > 2)
+    {
+        ok = false;
+        return;
+    }
+
+    unsigned int outIdx = 0;
+    const int count = len; // We modify len below
+    out.resize((count));
+
+    for(int idx = 0; idx < count; ++idx)
+    {
+        const unsigned char ch = data[idx];
+        if((ch > 47 && ch < 58) ||
+            (ch > 64 && ch < 91) ||
+            (ch > 96 && ch < 123) ||
+            ch == '+' ||
+            ch == '/')
+        {
+            out[outIdx++] = Base64DecMap[ch];
+        }
+        else if(ch == '=')
+        {
+            if((idx + 1) == count || data[idx + 1] == '=')
+            {
+                out[++outIdx] = Base64DecMap[ch];
+                continue;
+            }
+
+            ok = false;
+            return;
+        }
+        else if(ch == ' ')
+        {
+            /* One space is ok, and the previously applied whitespace facet(not implemented
+             * at this time of writing) have ensured it's only one space, so we assume that. */
+            --tail;
+            --len;
+            continue;
+        }
+        else
+        {
+            ok = false;
+            return;
+        }
+    }
+
+    if(outIdx % 4 != 0)
+    {
+        ok = false;
+        return;
+    }
+
+    out.resize(len);
+
+    // 4-byte to 3-byte conversion
+    len = (tail > (len / 4)) ? tail - (len / 4) : 0;
+    int sidx = 0, didx = 0;
+    if(len > 1)
+    {
+      while(didx < len - 2)
+      {
+          out[didx] =(((out[sidx] << 2) & 255) | ((out[sidx + 1] >> 4) & 003));
+          out[didx + 1] =(((out[sidx + 1] << 4) & 255) | ((out[sidx + 2] >> 2) & 017));
+          out[didx + 2] =(((out[sidx + 2] << 6) & 255) | (out[sidx + 3] & 077));
+          sidx += 4;
+          didx += 3;
+      }
+    }
+
+    if(didx < len)
+        out[didx] =(((out[sidx] << 2) & 255) | ((out[sidx + 1] >> 4) & 003));
+
+    if(++didx < len)
+        out[didx] =(((out[sidx + 1] << 4) & 255) | ((out[sidx + 2] >> 2) & 017));
+
+    // Resize the output buffer
+    if(len == 0 || len < out.size())
+      out.resize(len);
+}
+
+AtomicValue::Ptr Base64Binary::fromLexical(const QString &str)
+{
+    const QString simple(str.simplified());
+    if(simple.isEmpty())
+        return AtomicValue::Ptr(new Base64Binary(QByteArray()));
+
+    bool ok = false;
+    QByteArray result;
+    base64Decode(simple.toUtf8(), result, ok);
+
+    if(ok)
+        return AtomicValue::Ptr(new Base64Binary(result));
+    else
+        return ValidationError::createError();
+}
+
+Base64Binary::Ptr Base64Binary::fromValue(const QByteArray &data)
+{
+    return Base64Binary::Ptr(new Base64Binary(data));
+}
+
+QString Base64Binary::stringValue() const
+{
+    return QString::fromLatin1(m_value.toBase64().constData());
+}
+
+ItemType::Ptr Base64Binary::type() const
+{
+    return BuiltinTypes::xsBase64Binary;
+}
+
+QT_END_NAMESPACE