/**************************************************************************\ * * This file is part of the Coin 3D visualization library. * Copyright (C) 1998-2007 by Systems in Motion. All rights reserved. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * ("GPL") version 2 as published by the Free Software Foundation. * See the file LICENSE.GPL at the root directory of this source * distribution for additional information about the GNU GPL. * * For using Coin with software that can not be combined with the GNU * GPL, and for taking advantage of the additional benefits of our * support services, please contact Systems in Motion about acquiring * a Coin Professional Edition License. * * See http://www.coin3d.org/ for more information. * * Systems in Motion, Postboks 1283, Pirsenteret, 7462 Trondheim, NORWAY. * http://www.sim.no/ sales@sim.no coin-support@coin3d.org * \**************************************************************************/ /*! \class SoEngineOutputData SoOutputData.h Inventor/engines/SoOutputData.h \brief The SoEngineOutputData class is a container for a prototype set of outputs. \ingroup engines This class is instantiated once for each class of objects which use outputs, and which needs to be able to import and export them. Each output of a class is stored with the name and type it has been given within its "owner" class and a pointer offset to the dynamic instance of the output itself. It is unlikely that application programmers should need to use any of the methods of this class directly. */ /* IMPORTANT NOTE: * If you make any changes (bugfixes, improvements) in this class, * remember to also check the SoFieldData class, as this code is heavily * based on that class. */ #include #include #include #include #include #include #include #if COIN_DEBUG #include #endif // COIN_DEBUG #include // COIN_STUB() #ifndef DOXYGEN_SKIP_THIS // Don't document internal classes. class SoOutputDataEntry { public: SoOutputDataEntry(const char * n, SoType t, ptrdiff_t offset) : name(n), type(t), ptroffset(offset) { } SoOutputDataEntry(const SoOutputDataEntry * oe) { this->copy(oe); } SoOutputDataEntry(const SoOutputDataEntry & oe) { this->copy(&oe); } int operator==(const SoOutputDataEntry * oe) const { return ((this->name == oe->name) && (this->ptroffset == oe->ptroffset) && (this->type == oe->type)); } int operator!=(const SoOutputDataEntry * oe) const { return ! operator==(oe); } int operator==(const SoOutputDataEntry & oe) const { return operator==(&oe); } int operator!=(const SoOutputDataEntry & oe) const { return ! operator==(&oe); } SbName name; SoType type; ptrdiff_t ptroffset; private: void copy(const SoOutputDataEntry * oe) { this->name = oe->name; this->type = oe->type; this->ptroffset = oe->ptroffset; } }; #endif // DOXYGEN_SKIP_THIS /*! Constructor. */ SoEngineOutputData::SoEngineOutputData() { } /*! Copy constructor. */ SoEngineOutputData::SoEngineOutputData(const SoEngineOutputData *data) { if (data) { int n = data->outputlist.getLength(); for (int i = 0; i < n; i++) { this->outputlist.append(new SoOutputDataEntry(data->outputlist[i])); } } } /*! Constructor. Supply the approximated number of outputs in the engine ot optimize memory allocation. */ SoEngineOutputData::SoEngineOutputData(int approxnum) : outputlist(approxnum) { } /*! Destructor. */ SoEngineOutputData::~SoEngineOutputData() { for (int i = 0; i < this->outputlist.getLength(); i++) { delete this->outputlist[i]; } } /*! Add a new output to our internal list. The \a name and \a type will be stored along with a pointer offset between \a base and \a output, which will be valid for all instances of the class type of \a base. */ void SoEngineOutputData::addOutput(const SoEngine *base, const char *name, const SoEngineOutput *output, SoType type) { CC_GLOBAL_LOCK; if (!this->hasOutput(name)) { this->addOutputInternal((const SoFieldContainer*) base, name, output, type); } CC_GLOBAL_UNLOCK; } /*! Returns the number of outputs contained within this instance. */ int SoEngineOutputData::getNumOutputs(void) const { return this->outputlist.getLength(); } /*! Returns the name of the output at \a index. */ const SbName & SoEngineOutputData::getOutputName(int index) const { return this->outputlist[index]->name; } /*! Returns a pointer to the output at \a index within the \a engine instance. */ SoEngineOutput * SoEngineOutputData::getOutput(const SoEngine *engine, int index) const { return this->getOutputInternal((const SoFieldContainer*) engine, index); } /*! Returns the internal index value of \a output in \a engine. If \a output is not part of \a engine, it returns -1. */ int SoEngineOutputData::getIndex(const SoEngine *engine, const SoEngineOutput *output) const { return this->getIndexInternal((const SoFieldContainer*) engine, output); } /*! Returns the type of the output at \a index. */ const SoType & SoEngineOutputData::getType(int index) const { return this->outputlist[index]->type; } /*! FIXME: doc */ SbBool SoEngineOutputData::readDescriptions(SoInput *in, SoEngine *engine) const { COIN_STUB(); return FALSE; } /* FIXME: doc. */ void SoEngineOutputData::writeDescriptions(SoOutput *out, SoEngine *engine) const { COIN_STUB(); } /*! \overload */ void SoEngineOutputData::addOutput(const SoNodeEngine * base, const char *name, const SoEngineOutput * output, SoType type) { CC_GLOBAL_LOCK; if (!this->hasOutput(name)) { this->addOutputInternal((const SoFieldContainer*) base, name, output, type); } CC_GLOBAL_UNLOCK; } /*! \overload */ SoEngineOutput * SoEngineOutputData::getOutput(const SoNodeEngine * engine, int index) const { return this->getOutputInternal((const SoFieldContainer*) engine, index); } /*! \overload */ int SoEngineOutputData::getIndex(const SoNodeEngine * engine, const SoEngineOutput * output) const { return this->getIndexInternal((const SoFieldContainer*) engine, output); } // does the actual job of adding an engine output void SoEngineOutputData::addOutputInternal(const SoFieldContainer * base, const char *name, const SoEngineOutput * output, SoType type) { char * vbase = (char *)base; char * voutput = (char *)output; const ptrdiff_t range = voutput - vbase; this->outputlist.append(new SoOutputDataEntry(name, type, range)); #if COIN_DEBUG // FIXME: this is an ugly design flaw, which doesn't seem easily // resolvable while still keeping compatibility. 20000915 mortene. if (type.isDerivedFrom(SoType::fromName("SFEnum")) || type.isDerivedFrom(SoType::fromName("MFEnum"))) { static SbBool warn = TRUE; if (warn) { warn = FALSE; // Warn only once. SoDebugError::postWarning("SoEngineOutputData::addOutput", "Using as engine output a field which has " "enum type is not advisable, as it contains " "more state than just the value of the field " "(i.e. the name<->value hash mapping must " "also be considered in certain situations). " "This is a design flaw."); } } #endif // COIN_DEBUG } // does the actual job of returning an engine output SoEngineOutput * SoEngineOutputData::getOutputInternal(const SoFieldContainer * base, int index) const { assert(index >= 0 && index < this->outputlist.getLength()); char * outputptr = (char *)base; outputptr += this->outputlist[index]->ptroffset; return (SoEngineOutput *)outputptr; } // does the actual job of returning an engine output index int SoEngineOutputData::getIndexInternal(const SoFieldContainer * base, const SoEngineOutput * output) const { char * vbase = (char *)base; char * voutput = (char *)output; const ptrdiff_t ptroffset = voutput - vbase; for (int i = 0; i < this->outputlist.getLength(); i++) { if (this->outputlist[i]->ptroffset == ptroffset) return i; } return -1; } /*! \internal \since Coin 2.3 */ SbBool SoEngineOutputData::hasOutput(const char * name) const { for (int i = 0; i < this->outputlist.getLength(); i++) { if (this->outputlist[i]->name == name) return TRUE; } return FALSE; }