PLearn 0.1
InjectionTest.cc
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00001 // -*- C++ -*-
00002 
00003 // InjectionTest.cc
00004 //
00005 // Copyright (C) 2005-2006 Olivier Delalleau 
00006 // 
00007 // Redistribution and use in source and binary forms, with or without
00008 // modification, are permitted provided that the following conditions are met:
00009 // 
00010 //  1. Redistributions of source code must retain the above copyright
00011 //     notice, this list of conditions and the following disclaimer.
00012 // 
00013 //  2. Redistributions in binary form must reproduce the above copyright
00014 //     notice, this list of conditions and the following disclaimer in the
00015 //     documentation and/or other materials provided with the distribution.
00016 // 
00017 //  3. The name of the authors may not be used to endorse or promote
00018 //     products derived from this software without specific prior written
00019 //     permission.
00020 // 
00021 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
00022 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00023 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
00024 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00025 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00026 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00027 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00028 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00029 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00030 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00031 // 
00032 // This file is part of the PLearn library. For more information on the PLearn
00033 // library, go to the PLearn Web site at www.plearn.org
00034 
00035 /* *******************************************************      
00036    * $Id: .pyskeleton_header 544 2003-09-01 00:05:31Z plearner $ 
00037    ******************************************************* */
00038 
00039 // Authors: Olivier Delalleau
00040 
00044 #include <plearn/python/PythonCodeSnippet.h>
00045 #include <iostream>
00046 
00047 #include "InjectionTest.h"
00048 
00049 namespace PLearn {
00050 using namespace std;
00051 
00052 PLEARN_IMPLEMENT_OBJECT(
00053     InjectionTest,
00054     "Ensure that the Python function PyCFunction_NewEx works correctly",
00055     ""
00056 );
00057 
00059 // InjectionTest //
00061 InjectionTest::InjectionTest() 
00062     /* ### Initialize all fields to their default value */
00063 {
00064     // ...
00065 
00066     // ### You may (or not) want to call build_() to finish building the object
00067     // ### (doing so assumes the parent classes' build_() have been called too
00068     // ### in the parent classes' constructors, something that you must ensure)
00069 }
00070 
00072 // build //
00074 void InjectionTest::build()
00075 {
00076     inherited::build();
00077     build_();
00078 }
00079 
00081 // makeDeepCopyFromShallowCopy //
00083 void InjectionTest::makeDeepCopyFromShallowCopy(CopiesMap& copies)
00084 {
00085     inherited::makeDeepCopyFromShallowCopy(copies);
00086 
00087     // ### Call deepCopyField on all "pointer-like" fields 
00088     // ### that you wish to be deepCopied rather than 
00089     // ### shallow-copied.
00090     // ### ex:
00091     // deepCopyField(trainvec, copies);
00092 
00093     // ### Remove this line when you have fully implemented this method.
00094     PLERROR("InjectionTest::makeDeepCopyFromShallowCopy not fully (correctly) implemented yet!");
00095 }
00096 
00098 // declareOptions //
00100 void InjectionTest::declareOptions(OptionList& ol)
00101 {
00102     // ### Declare all of this object's options here
00103     // ### For the "flags" of each option, you should typically specify  
00104     // ### one of OptionBase::buildoption, OptionBase::learntoption or 
00105     // ### OptionBase::tuningoption. Another possible flag to be combined with
00106     // ### is OptionBase::nosave
00107 
00108     // ### ex:
00109     // declareOption(ol, "myoption", &InjectionTest::myoption, OptionBase::buildoption,
00110     //               "Help text describing this option");
00111     // ...
00112 
00113     // Now call the parent class' declareOptions
00114     inherited::declareOptions(ol);
00115 }
00116 
00118 // build_ //
00120 void InjectionTest::build_()
00121 {
00122     // ### This method should do the real building of the object,
00123     // ### according to set 'options', in *any* situation. 
00124     // ### Typical situations include:
00125     // ###  - Initial building of an object from a few user-specified options
00126     // ###  - Building of a "reloaded" object: i.e. from the complete set of all serialised options.
00127     // ###  - Updating or "re-building" of an object after a few "tuning" options have been modified.
00128     // ### You should assume that the parent class' build_() has already been called.
00129 }
00130 
00131 string InjectionTest::python_code =
00132 "import sys\n"
00133 "\n"
00134 "def trampoline_function_call(x):\n"
00135 "    y = injected_c_function(x)\n"
00136 "    print >>sys.stderr, 'The C function returned the charming value',y\n"
00137 "    sys.stderr.flush()\n"
00138 "\n"
00139 "def trampoline_method_call(x):\n"
00140 "    y = injected_c_method1(x)\n"
00141 "    z = injected_c_method2(x)\n"
00142 "    print >>sys.stderr, 'The C method 1 returned the charming value',y\n"
00143 "    print >>sys.stderr, 'The C method 2 returned the charming value',z\n"
00144 "    sys.stderr.flush()\n"
00145 ;
00146 
00147 PythonObjectWrapper InjectionTest_basic_function(const TVec<PythonObjectWrapper>& args)
00148 {
00149     cout << "basic_function called with arg[0]="
00150          << args[0].as<int>() << endl;
00151     return PythonObjectWrapper(42);
00152 }
00153 
00154 
00155 struct X
00156 {
00157     X(int value) : i(value) { }
00158   
00159     int i;
00160     PythonObjectWrapper f(const TVec<PythonObjectWrapper>& args);
00161     PythonObjectWrapper g(const TVec<PythonObjectWrapper>& args) const;
00162 };
00163 
00164 PythonObjectWrapper X::f(const TVec<PythonObjectWrapper>& args)
00165 {
00166     cout << "X::f() called with i=" << i << " and arg[0]="
00167          << args[0].as<int>() << endl;
00168     return PythonObjectWrapper(1337);
00169 }
00170 
00171 PythonObjectWrapper X::g(const TVec<PythonObjectWrapper>& args) const
00172 {
00173     cout << "X::g() called with i=" << i << " and arg[0]="
00174          << args[0].as<int>() << endl;
00175     return PythonObjectWrapper(1337*2);
00176 }
00177 
00179 // perform //
00181 void InjectionTest::perform()
00182 {
00183     PP<PythonCodeSnippet> python = new PythonCodeSnippet(python_code);
00184     python->build();
00185 
00186     X x(13370);
00187     
00188     python->inject("injected_c_function", InjectionTest_basic_function);
00189     python->inject("injected_c_function2", InjectionTest_basic_function);
00190     python->inject("injected_c_method1", &x, &X::f);
00191     python->inject("injected_c_method2", &x, &X::g);
00192 
00193     python->invoke("trampoline_function_call", 64);
00194     python->invoke("trampoline_method_call",   128);
00195 }
00196 
00197 } // end of namespace PLearn
00198 
00199 
00200 /*
00201   Local Variables:
00202   mode:c++
00203   c-basic-offset:4
00204   c-file-style:"stroustrup"
00205   c-file-offsets:((innamespace . 0)(inline-open . 0))
00206   indent-tabs-mode:nil
00207   fill-column:79
00208   End:
00209 */
00210 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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