Qt 4.8
qbase64binary.cpp
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41 
42 #include <QByteArray>
43 #include <QtGlobal>
44 
45 #include "qbuiltintypes_p.h"
46 #include "qvalidationerror_p.h"
47 
48 #include "qbase64binary_p.h"
49 
51 
52 using namespace QPatternist;
53 
54 Base64Binary::Base64Binary(const QByteArray &val) : m_value(val)
55 {
56 }
57 
58 const char Base64Binary::Base64DecMap[128] =
59 {
60  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
61  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
62  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
63  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
64  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
65  0x00, 0x00, 0x00, 0x3E, 0x00, 0x00, 0x00, 0x3F,
66  0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B,
67  0x3C, 0x3D, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
68  0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
69  0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E,
70  0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
71  0x17, 0x18, 0x19, 0x00, 0x00, 0x00, 0x00, 0x00,
72  0x00, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20,
73  0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
74  0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30,
75  0x31, 0x32, 0x33, 0x00, 0x00, 0x00, 0x00, 0x00
76 };
77 
78 void Base64Binary::base64Decode(const QByteArray &in, QByteArray &out, bool &ok)
79 {
80  out.resize(0);
81 
82  if(in.isEmpty())
83  {
84  ok = false;
85  return;
86  }
87 
88  ok = true;
89  int len = in.size(), tail = len;
90  const char *const data = in.data();
91  unsigned int eqCount = 0;
92 
93  // Find the tail end of the actual encoded data even if
94  // there is/are trailing CR and/or LF.
95  while(data[tail - 1] == '=')
96  {
97  --tail;
98  if(data[tail] != '=')
99  len = tail;
100  else
101  ++eqCount;
102  }
103 
104  if(eqCount > 2)
105  {
106  ok = false;
107  return;
108  }
109 
110  unsigned int outIdx = 0;
111  const int count = len; // We modify len below
112  out.resize((count));
113 
114  for(int idx = 0; idx < count; ++idx)
115  {
116  const unsigned char ch = data[idx];
117  if((ch > 47 && ch < 58) ||
118  (ch > 64 && ch < 91) ||
119  (ch > 96 && ch < 123) ||
120  ch == '+' ||
121  ch == '/')
122  {
123  out[outIdx++] = Base64DecMap[ch];
124  }
125  else if(ch == '=')
126  {
127  if((idx + 1) == count || data[idx + 1] == '=')
128  {
129  out[++outIdx] = Base64DecMap[ch];
130  continue;
131  }
132 
133  ok = false;
134  return;
135  }
136  else if(ch == ' ')
137  {
138  /* One space is ok, and the previously applied whitespace facet(not implemented
139  * at this time of writing) have ensured it's only one space, so we assume that. */
140  --tail;
141  --len;
142  continue;
143  }
144  else
145  {
146  ok = false;
147  return;
148  }
149  }
150 
151  if(outIdx % 4 != 0)
152  {
153  ok = false;
154  return;
155  }
156 
157  out.resize(len);
158 
159  // 4-byte to 3-byte conversion
160  len = (tail > (len / 4)) ? tail - (len / 4) : 0;
161  int sidx = 0, didx = 0;
162  if(len > 1)
163  {
164  while(didx < len - 2)
165  {
166  out[didx] =(((out[sidx] << 2) & 255) | ((out[sidx + 1] >> 4) & 003));
167  out[didx + 1] =(((out[sidx + 1] << 4) & 255) | ((out[sidx + 2] >> 2) & 017));
168  out[didx + 2] =(((out[sidx + 2] << 6) & 255) | (out[sidx + 3] & 077));
169  sidx += 4;
170  didx += 3;
171  }
172  }
173 
174  if(didx < len)
175  out[didx] =(((out[sidx] << 2) & 255) | ((out[sidx + 1] >> 4) & 003));
176 
177  if(++didx < len)
178  out[didx] =(((out[sidx + 1] << 4) & 255) | ((out[sidx + 2] >> 2) & 017));
179 
180  // Resize the output buffer
181  if(len == 0 || len < out.size())
182  out.resize(len);
183 }
184 
186 {
187  const QString simple(str.simplified());
188  if(simple.isEmpty())
190 
191  bool ok = false;
192  QByteArray result;
193  base64Decode(simple.toUtf8(), result, ok);
194 
195  if(ok)
196  return AtomicValue::Ptr(new Base64Binary(result));
197  else
199 }
200 
202 {
203  return Base64Binary::Ptr(new Base64Binary(data));
204 }
205 
207 {
209 }
210 
212 {
214 }
215 
static const AtomicType::Ptr xsBase64Binary
QExplicitlySharedDataPointer< AtomicValue > Ptr
Definition: qitem_p.h:127
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
virtual QString stringValue() const
char * data()
Returns a pointer to the data stored in the byte array.
Definition: qbytearray.h:429
The QByteArray class provides an array of bytes.
Definition: qbytearray.h:135
Base64Binary(const QByteArray &val)
virtual ItemType::Ptr type() const
static AtomicValue::Ptr createError(const QString &description=QString(), const ReportContext::ErrorCode=ReportContext::FORG0001)
The QString class provides a Unicode character string.
Definition: qstring.h:83
static AtomicValue::Ptr fromLexical(const QString &value)
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
The namespace for the internal API of QtXmlPatterns.
static const char * data(const QByteArray &arr)
const char * constData() const
Returns a pointer to the data stored in the byte array.
Definition: qbytearray.h:433
QString simplified() const Q_REQUIRED_RESULT
Returns a string that has whitespace removed from the start and the end, and that has each sequence o...
Definition: qstring.cpp:4415
static QString fromLatin1(const char *, int size=-1)
Returns a QString initialized with the first size characters of the Latin-1 string str...
Definition: qstring.cpp:4188
void resize(int size)
Sets the size of the byte array to size bytes.
QByteArray toBase64() const
Returns a copy of the byte array, encoded as Base64.
int size() const
Returns the number of bytes in this byte array.
Definition: qbytearray.h:402
static void base64Decode(const QByteArray &in, QByteArray &out, bool &ok)
Assumes in is a lexical representation of xs:base64Binary, and converts it to the binary data set in ...
bool isEmpty() const
Returns true if the byte array has size 0; otherwise returns false.
Definition: qbytearray.h:421
static Base64Binary::Ptr fromValue(const QByteArray &data)
static const char Base64DecMap[128]
const QByteArray m_value