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# SPDX-FileCopyrightInfo: Copyright © DUNE Project contributors, see file LICENSE.md in module root
# SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
""" Generator module:
The module provides the main class for on the fly generation of pybind11
Python wrappers for implementations of a gives interface. The necessary
details for each implementation (the C++ typedef and the includes) are
provided by python dictionaries stored in files.
"""
import logging
from dune.common.hashit import hashIt
logger = logging.getLogger(__name__)
class SimpleGenerator(object):
def __init__(self, typeName, namespace, pythonname=None, filename=None):
if not (isinstance(typeName,list) or isinstance(typeName,tuple)):
self.single = True
typeName = [typeName]
else:
self.single = False
self.typeName = typeName
if namespace:
self.namespace = namespace+"::"
else:
self.namespace = ""
if pythonname is None:
self.pythonName = typeName
else:
self.pythonName = pythonname
self.fileName = filename
def pre(self, includes, duneType, moduleName, defines=None, preamble=None):
if defines is None: defines = []
source = '#ifndef Guard_' + moduleName + '\n'
source += '#define Guard_' + moduleName + '\n\n'
source += '#include <config.h>\n\n'
source += '#define USING_DUNE_PYTHON 1\n\n'
source += ''.join(["#define " + d + "\n" for d in defines])
source += ''.join(["#include <" + i + ">\n" for i in includes])
source += '\n'
source += '#include <dune/python/common/typeregistry.hh>\n'
source += '#include <dune/python/pybind11/pybind11.h>\n'
source += '#include <dune/python/pybind11/stl.h>\n'
source += '\n'
if self.fileName is not None:
with open(self.fileName, "r") as include:
source += include.read()
source += "\n"
if preamble is not None:
source += preamble
source += "\n"
if self.namespace == "":
source += "void register" + self.typeName[0] + "( ... ) {}\n"
source += "PYBIND11_MODULE( " + moduleName + ", module )\n"
source += "{\n"
return source
def main(self, nr, includes, duneType, *args,
options=None, bufferProtocol=False, dynamicAttr=False,
holder="default",
baseClasses=None):
if options is None: options=[]
if baseClasses is None: baseClasses=[]
source = " using pybind11::operator\"\"_a;\n"
if not bufferProtocol: # kwargs.get("bufferProtocol", False):
clsParams = []
else:
clsParams = ['pybind11::buffer_protocol()']
if dynamicAttr:
clsParams += ['pybind11::dynamic_attr()']
if nr == 0:
source += ' pybind11::module cls0 = module;\n'
source += ' {\n'
source += " using DuneType = " + duneType + ";\n"
for i, bc in enumerate(baseClasses):
if not holder == "default":
baseHolder = "," + holder + "<" + bc + ">"
else:
baseHolder = ''
source += ' Dune::Python::insertClass' +\
'< ' + bc + baseHolder + '>' +\
'( module, "cls' + str(i) + '"' +\
', Dune::Python::GenerateTypeName("' + bc + '")' +\
', Dune::Python::IncludeFiles{}' +\
");\n"
options.append(bc)
if not holder == "default":
options += [holder + "<DuneType>"]
source += ' auto cls = Dune::Python::insertClass' +\
'< DuneType' +\
', '.join(('',)+tuple(options)) + ' >' +\
'( cls0, "' + self.pythonName[nr] + '"' +\
','.join(('',)+tuple(clsParams)) +\
', Dune::Python::GenerateTypeName("' + duneType + '")' +\
', Dune::Python::IncludeFiles{' + ','.join(['"' + i + '"' for i in includes]) + '}' +\
").first;\n"
source += " " + self.namespace + "register" + self.typeName[nr] + "( cls0, cls );\n"
for arg in args:
if arg:
source += "".join(" " + s + "\n" for s in str(arg).splitlines())
source += ' }\n'
return source
def post(self, moduleName, source, postscript, extraCMake):
if postscript:
source += postscript
source += "}\n"
source += '#endif'
# make sure to reload the builder here in case it got updated
from . import builder
module = builder.load(moduleName, source, self.typeName[0], extraCMake)
return module
def load(self, includes, typeName, moduleName, *args,
extraCMake=None,
defines=None, preamble=None, postscript=None,
options=None, bufferProtocol=False, dynamicAttr=False,
baseClasses=None, holder="default" ):
if defines is None: defines = []
if options is None: options = []
if baseClasses is None: baseClasses = []
if extraCMake is None: extraCMake = []
if self.single:
typeName = (typeName,)
options = (options,)
bufferProtocol = (bufferProtocol,)
dynamicAttr = (dynamicAttr,)
args = (args,)
baseClasses = (baseClasses,)
holder = (holder,)
else:
if len(args) == 0:
args=((),)*2
else:
args = args[0]
if holder == "default":
holder = ("default",)*len(typeName)
if len(options) == 0:
options = ((),)*len(typeName)
if len(baseClasses) == 0:
baseClasses = ((),)*len(typeName)
if not bufferProtocol:
bufferProtocol = (False,)*len(typeName)
if not dynamicAttr:
dynamicAttr = (False,)*len(typeName)
if isinstance(includes[0],tuple) or isinstance(includes[0],list):
allIncludes = [item for sublist in includes for item in sublist]
includes = includes[0]
else:
allIncludes = includes
allIncludes = sorted(set(allIncludes))
includes = sorted(set(includes))
source = self.pre(allIncludes, typeName[0], moduleName, defines, preamble)
for nr, (tn, a, o, b, d, bc, h) in enumerate( zip(typeName, args, options, bufferProtocol, dynamicAttr, baseClasses, holder) ):
source += self.main(nr, includes, tn, *a, options=o,
bufferProtocol=b, dynamicAttr=d,
baseClasses=bc, holder=h)
return self.post(moduleName, source, postscript, extraCMake)
def simpleGenerator(inc, baseType, namespace, pythonname=None, filename=None):
generator = SimpleGenerator(baseType, namespace, pythonname, filename)
def load(includes, typeName, *args):
includes = includes + inc
moduleName = namespace + "_" + baseType + "_" + hashIt(typeName)
return generator.load(includes, typeName, moduleName, *args)
return load
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