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// @snippet qglbuffer-allocate
int size = (%2 < 0) ? %1.size() : %2;
%CPPSELF.allocate(static_cast<const void *>(%1.data()), size);
// @snippet qglbuffer-allocate

// @snippet qglbuffer-read
char *data = new char[%3];
bool result = %CPPSELF.read(%1, data, %3);
QByteArray ret;
if (result)
    ret.append(data, %3);
%PYARG_0 = PyTuple_New(2);
PyTuple_SET_ITEM(%PYARG_0, 0, %CONVERTTOPYTHON[bool](result));
PyTuple_SET_ITEM(%PYARG_0, 1, %CONVERTTOPYTHON[QByteArray](ret));
delete[] data;
// @snippet qglbuffer-read

// @snippet qglbuffer-write
int size = (%3 < 0) ? %2.size() : %3;
%CPPSELF.write(%1, static_cast<const void *>(%2.data()), size);
// @snippet qglbuffer-write

// @snippet qglbuffer-map
Py_ssize_t dataSize = %CPPSELF.size();
void *data = %CPPSELF.map(%1);

if (!data) {
    Py_INCREF(Py_None);
    %PYARG_0 = Py_None;
} else if (%1 == QGLBuffer::ReadOnly) {
    %PYARG_0 = Shiboken::Buffer::newObject(data, dataSize, Shiboken::Buffer::ReadOnly);
} else {
    %PYARG_0 = Shiboken::Buffer::newObject(data, dataSize, Shiboken::Buffer::ReadWrite);
}
// @snippet qglbuffer-map