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Invocation.cpp
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Invocation.cpp
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/******************************************************************************
* Copyright (c) 2011, Michael P. Gerlek (mpg@flaxen.com)
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided
* with the distribution.
* * Neither the name of Hobu, Inc. or Flaxen Geo Consulting nor the
* names of its contributors may be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
****************************************************************************/
#include <pdal/pdal_internal.hpp>
#include <pdal/GlobalEnvironment.hpp>
#ifdef PDAL_HAVE_PYTHON
#include <pdal/plang/Invocation.hpp>
#ifdef PDAL_COMPILER_MSVC
# pragma warning(disable: 4127) // conditional expression is constant
#endif
#include <Python.h>
// This file can only be included once, otherwise we get wierd runtime errors,
// even if we define NO_IMPORT and stuff, so we include it only here, and provide
// a backdoor function numpy_init() which gets called from GlobalEnvironment::startup().
#include <numpy/arrayobject.h>
namespace pdal
{
namespace plang
{
void Invocation::numpy_init()
{
// this macro is defined be NumPy and must be included
if (_import_array() < 0)
{
PyObject *ptype, *pvalue, *ptraceback;
PyErr_Fetch(&ptype, &pvalue, &ptraceback);
char *message = PyString_AsString(pvalue);
std::ostringstream oss;
oss << "unable to initialize NumPy with error '" << std::string(message) << "'";
throw python_error(oss.str());
}
}
Invocation::Invocation(const Script& script)
: m_script(script)
, m_environment(pdal::GlobalEnvironment::get().getPythonEnvironment())
, m_bytecode(NULL)
, m_module(NULL)
, m_dictionary(NULL)
, m_function(NULL)
, m_varsIn(NULL)
, m_varsOut(NULL)
, m_scriptArgs(NULL)
, m_scriptResult(NULL)
{
resetArguments();
return;
}
Invocation::~Invocation()
{
cleanup();
return;
}
void Invocation::compile()
{
m_bytecode = Py_CompileString(m_script.source(), m_script.module(), Py_file_input);
if (!m_bytecode) m_environment.handleError();
assert(m_bytecode);
m_module = PyImport_ExecCodeModule(const_cast<char*>(m_script.module()), m_bytecode);
if (!m_module) m_environment.handleError();
m_dictionary = PyModule_GetDict(m_module);
m_function = PyDict_GetItemString(m_dictionary, m_script.function());
if (!m_function)
{
std::ostringstream oss;
oss << "unable to find target function '" << m_script.function() << "' in module";
throw python_error(oss.str());
}
if (!PyCallable_Check(m_function)) m_environment.handleError();
return;
}
void Invocation::cleanup()
{
Py_XDECREF(m_varsIn);
Py_XDECREF(m_varsOut);
Py_XDECREF(m_scriptResult);
Py_XDECREF(m_scriptArgs); // also decrements script and vars
for (unsigned int i=0; i<m_pyInputArrays.size(); i++)
{
PyObject* obj = m_pyInputArrays[i];
Py_XDECREF(obj);
}
m_pyInputArrays.clear();
return;
}
void Invocation::resetArguments()
{
cleanup();
m_varsIn = PyDict_New();
m_varsOut = PyDict_New();
return;
}
void Invocation::insertArgument(const std::string& name,
boost::uint8_t* data,
boost::uint32_t data_len,
boost::uint32_t data_stride,
dimension::Interpretation dataType,
boost::uint32_t numBytes)
{
npy_intp mydims = data_len;
int nd = 1;
npy_intp* dims = &mydims;
npy_intp stride = data_stride;
npy_intp* strides = &stride;
int flags = NPY_CARRAY; // NPY_BEHAVED
const int pyDataType = getPythonDataType(dataType, numBytes);
PyObject* pyArray = PyArray_New(&PyArray_Type, nd, dims, pyDataType, strides, data, 0, flags, NULL);
m_pyInputArrays.push_back(pyArray);
PyDict_SetItemString(m_varsIn, name.c_str(), pyArray);
return;
}
void Invocation::extractResult(const std::string& name,
boost::uint8_t* dst,
boost::uint32_t data_len,
boost::uint32_t data_stride,
dimension::Interpretation dataType,
boost::uint32_t numBytes)
{
PyObject* xarr = PyDict_GetItemString(m_varsOut, name.c_str());
if (!xarr)
{
throw python_error("plang output variable '" + name + "' not found");
}
if (!PyArray_Check(xarr))
{
throw python_error("plang output variable '" + name + "' is not a numpy array");
}
PyArrayObject* arr = (PyArrayObject*)xarr;
npy_intp one=0;
const int pyDataType = getPythonDataType(dataType, numBytes);
boost::uint8_t* p = dst;
if (pyDataType == PyArray_DOUBLE)
{
double* src = (double*)PyArray_GetPtr(arr, &one);
for (unsigned int i=0; i<data_len; i++)
{
*(double*)p = src[i];
p += data_stride;
}
}
else if (pyDataType == PyArray_FLOAT)
{
float* src = (float*)PyArray_GetPtr(arr, &one);
for (unsigned int i=0; i<data_len; i++)
{
*(float*)p = src[i];
p += data_stride;
}
}
else if (pyDataType == PyArray_BYTE)
{
boost::int8_t* src = (boost::int8_t*)PyArray_GetPtr(arr, &one);
for (unsigned int i=0; i<data_len; i++)
{
*(boost::int8_t*)p = src[i];
p += data_stride;
}
}
else if (pyDataType == PyArray_UBYTE)
{
boost::uint8_t* src = (boost::uint8_t*)PyArray_GetPtr(arr, &one);
for (unsigned int i=0; i<data_len; i++)
{
*(boost::uint8_t*)p = src[i];
p += data_stride;
}
}
else if (pyDataType == PyArray_SHORT)
{
boost::int16_t* src = (boost::int16_t*)PyArray_GetPtr(arr, &one);
for (unsigned int i=0; i<data_len; i++)
{
*(boost::int16_t*)p = src[i];
p += data_stride;
}
}
else if (pyDataType == PyArray_USHORT)
{
boost::uint16_t* src = (boost::uint16_t*)PyArray_GetPtr(arr, &one);
for (unsigned int i=0; i<data_len; i++)
{
*(boost::uint16_t*)p = src[i];
p += data_stride;
}
}
else if (pyDataType == PyArray_INT)
{
boost::int32_t* src = (boost::int32_t*)PyArray_GetPtr(arr, &one);
for (unsigned int i=0; i<data_len; i++)
{
*(boost::int32_t*)p = src[i];
p += data_stride;
}
}
else if (pyDataType == PyArray_UINT)
{
boost::uint32_t* src = (boost::uint32_t*)PyArray_GetPtr(arr, &one);
for (unsigned int i=0; i<data_len; i++)
{
*(boost::uint32_t*)p = src[i];
p += data_stride;
}
}
else if (pyDataType == PyArray_LONGLONG)
{
boost::int64_t* src = (boost::int64_t*)PyArray_GetPtr(arr, &one);
for (unsigned int i=0; i<data_len; i++)
{
*(boost::int64_t*)p = src[i];
p += data_stride;
}
}
else if (pyDataType == PyArray_ULONGLONG)
{
boost::uint64_t* src = (boost::uint64_t*)PyArray_GetPtr(arr, &one);
for (unsigned int i=0; i<data_len; i++)
{
*(boost::uint64_t*)p = src[i];
p += data_stride;
}
}
else
{
assert(0);
}
return;
}
void Invocation::getOutputNames(std::vector<std::string>& names)
{
names.clear();
PyObject *key, *value;
Py_ssize_t pos = 0;
while (PyDict_Next(m_varsOut, &pos, &key, &value))
{
char* p = PyString_AsString(key);
names.push_back(p);
}
return;
}
int Invocation::getPythonDataType(dimension::Interpretation datatype, boost::uint32_t siz)
{
switch (datatype)
{
case dimension::SignedByte:
switch (siz)
{
case 1:
return PyArray_BYTE;
}
break;
case dimension::UnsignedByte:
switch (siz)
{
case 1:
return PyArray_UBYTE;
}
break;
case dimension::Float:
switch (siz)
{
case 4:
return PyArray_FLOAT;
case 8:
return PyArray_DOUBLE;
}
break;
case dimension::SignedInteger:
switch (siz)
{
case 1:
return PyArray_BYTE;
case 2:
return PyArray_SHORT;
case 4:
return PyArray_INT;
case 8:
return PyArray_LONGLONG;
}
break;
case dimension::UnsignedInteger:
switch (siz)
{
case 1:
return PyArray_UBYTE;
case 2:
return PyArray_USHORT;
case 4:
return PyArray_UINT;
case 8:
return PyArray_ULONGLONG;
}
break;
default:
return -1;
}
assert(0);
return -1;
}
bool Invocation::hasOutputVariable(const std::string& name) const
{
PyObject* obj = PyDict_GetItemString(m_varsOut, name.c_str());
return (obj!=NULL);
}
bool Invocation::execute()
{
if (!m_bytecode)
{
throw python_error("no code has been compiled");
}
m_environment.gil_lock();
Py_INCREF(m_varsIn);
Py_INCREF(m_varsOut);
m_scriptArgs = PyTuple_New(2);
PyTuple_SetItem(m_scriptArgs, 0, m_varsIn);
PyTuple_SetItem(m_scriptArgs, 1, m_varsOut);
m_scriptResult = PyObject_CallObject(m_function, m_scriptArgs);
if (!m_scriptResult) m_environment.handleError();
if (!PyBool_Check(m_scriptResult))
{
throw python_error("user function return value not a boolean type");
}
bool sts = false;
if (m_scriptResult == Py_True)
{
sts = true;
}
m_environment.gil_unlock();
return sts;
}
}
} //namespaces
#endif