libs/rs/rsElement.cpp - platform/frameworks/base - Gitiles

 /*
  * Copyright (C) 2009 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */


 #include "rsContext.h"

 using namespace android;
 using namespace android::renderscript;


 Element::Element(Context *rsc) : ObjectBase(rsc) {
     mBits = 0;
     mFields = NULL;
     mFieldCount = 0;
     mHasReference = false;
 }

 Element::~Element() {
     for (uint32_t ct = 0; ct < mRSC->mStateElement.mElements.size(); ct++) {
         if (mRSC->mStateElement.mElements[ct] == this) {
             mRSC->mStateElement.mElements.removeAt(ct);
             break;
         }
     }
     clear();
 }

 void Element::clear() {
     delete [] mFields;
     mFields = NULL;
     mFieldCount = 0;
     mHasReference = false;
 }

 size_t Element::getSizeBits() const {
     if (!mFieldCount) {
         return mBits;
     }

     size_t total = 0;
     for (size_t ct=0; ct < mFieldCount; ct++) {
         total += mFields[ct].e->mBits * mFields[ct].arraySize;
     }
     return total;
 }

 void Element::dumpLOGV(const char *prefix) const {
     ObjectBase::dumpLOGV(prefix);
     LOGV("%s Element: fieldCount: %zu,  size bytes: %zu", prefix, mFieldCount, getSizeBytes());
     for (uint32_t ct = 0; ct < mFieldCount; ct++) {
         LOGV("%s Element field index: %u ------------------", prefix, ct);
         LOGV("%s name: %s, offsetBits: %u, arraySize: %u",
              prefix, mFields[ct].name.string(), mFields[ct].offsetBits, mFields[ct].arraySize);
         mFields[ct].e->dumpLOGV(prefix);
     }
 }

 void Element::serialize(OStream *stream) const {
     // Need to identify ourselves
     stream->addU32((uint32_t)getClassId());

     String8 name(getName());
     stream->addString(&name);

     mComponent.serialize(stream);

     // Now serialize all the fields
     stream->addU32(mFieldCount);
     for (uint32_t ct = 0; ct < mFieldCount; ct++) {
         stream->addString(&mFields[ct].name);
         stream->addU32(mFields[ct].arraySize);
         mFields[ct].e->serialize(stream);
     }
 }

 Element *Element::createFromStream(Context *rsc, IStream *stream) {
     // First make sure we are reading the correct object
     RsA3DClassID classID = (RsA3DClassID)stream->loadU32();
     if (classID != RS_A3D_CLASS_ID_ELEMENT) {
         LOGE("element loading skipped due to invalid class id\n");
         return NULL;
     }

     String8 name;
     stream->loadString(&name);

     Element *elem = new Element(rsc);
     elem->mComponent.loadFromStream(stream);

     elem->mFieldCount = stream->loadU32();
     if (elem->mFieldCount) {
         elem->mFields = new ElementField_t [elem->mFieldCount];
         for (uint32_t ct = 0; ct < elem->mFieldCount; ct ++) {
             stream->loadString(&elem->mFields[ct].name);
             elem->mFields[ct].arraySize = stream->loadU32();
             Element *fieldElem = Element::createFromStream(rsc, stream);
             elem->mFields[ct].e.set(fieldElem);
         }
     }

     // We need to check if this already exists
     for (uint32_t ct=0; ct < rsc->mStateElement.mElements.size(); ct++) {
         Element *ee = rsc->mStateElement.mElements[ct];
         if (ee->isEqual(elem)) {
             ObjectBase::checkDelete(elem);
             ee->incUserRef();
             return ee;
         }
     }

     elem->compute();
     rsc->mStateElement.mElements.push(elem);
     return elem;
 }

 bool Element::isEqual(const Element *other) const {
     if (other == NULL) {
         return false;
     }
     if (!other->getFieldCount() && !mFieldCount) {
         if ((other->getType() == getType()) &&
            (other->getKind() == getKind()) &&
            (other->getComponent().getIsNormalized() == getComponent().getIsNormalized()) &&
            (other->getComponent().getVectorSize() == getComponent().getVectorSize())) {
             return true;
         }
         return false;
     }
     if (other->getFieldCount() == mFieldCount) {
         for (uint32_t i=0; i < mFieldCount; i++) {
             if ((!other->mFields[i].e->isEqual(mFields[i].e.get())) ||
                 (other->mFields[i].name.length() != mFields[i].name.length()) ||
                 (other->mFields[i].name != mFields[i].name) ||
                 (other->mFields[i].arraySize != mFields[i].arraySize)) {
                 return false;
             }
         }
         return true;
     }
     return false;
 }

 void Element::compute() {
     if (mFieldCount == 0) {
         mBits = mComponent.getBits();
         mHasReference = mComponent.isReference();
         return;
     }

     size_t bits = 0;
     for (size_t ct=0; ct < mFieldCount; ct++) {
         mFields[ct].offsetBits = bits;
         bits += mFields[ct].e->getSizeBits() * mFields[ct].arraySize;

         if (mFields[ct].e->mHasReference) {
             mHasReference = true;
         }
     }

 }

 const Element * Element::create(Context *rsc, RsDataType dt, RsDataKind dk,
                                 bool isNorm, uint32_t vecSize) {
     // Look for an existing match.
     for (uint32_t ct=0; ct < rsc->mStateElement.mElements.size(); ct++) {
         const Element *ee = rsc->mStateElement.mElements[ct];
         if (!ee->getFieldCount() &&
             (ee->getComponent().getType() == dt) &&
             (ee->getComponent().getKind() == dk) &&
             (ee->getComponent().getIsNormalized() == isNorm) &&
             (ee->getComponent().getVectorSize() == vecSize)) {
             // Match
             ee->incUserRef();
             return ee;
         }
     }

     Element *e = new Element(rsc);
     e->mComponent.set(dt, dk, isNorm, vecSize);
     e->compute();
     rsc->mStateElement.mElements.push(e);
     return e;
 }

 const Element * Element::create(Context *rsc, size_t count, const Element **ein,
                             const char **nin, const size_t * lengths, const uint32_t *asin) {
     // Look for an existing match.
     for (uint32_t ct=0; ct < rsc->mStateElement.mElements.size(); ct++) {
         const Element *ee = rsc->mStateElement.mElements[ct];
         if (ee->getFieldCount() == count) {
             bool match = true;
             for (uint32_t i=0; i < count; i++) {
                 if ((ee->mFields[i].e.get() != ein[i]) ||
                     (ee->mFields[i].name.length() != lengths[i]) ||
                     (ee->mFields[i].name != nin[i]) ||
                     (ee->mFields[i].arraySize != asin[i])) {
                     match = false;
                     break;
                 }
             }
             if (match) {
                 ee->incUserRef();
                 return ee;
             }
         }
     }

     Element *e = new Element(rsc);
     e->mFields = new ElementField_t [count];
     e->mFieldCount = count;
     for (size_t ct=0; ct < count; ct++) {
         e->mFields[ct].e.set(ein[ct]);
         e->mFields[ct].name.setTo(nin[ct], lengths[ct]);
         e->mFields[ct].arraySize = asin[ct];
     }
     e->compute();

     rsc->mStateElement.mElements.push(e);
     return e;
 }

 String8 Element::getGLSLType(uint32_t indent) const {
     String8 s;
     for (uint32_t ct=0; ct < indent; ct++) {
         s.append(" ");
     }

     if (!mFieldCount) {
         // Basic component.
         s.append(mComponent.getGLSLType());
     } else {
         rsAssert(0);
         //s.append("struct ");
         //s.append(getCStructBody(indent));
     }

     return s;
 }

 void Element::incRefs(const void *ptr) const {
     if (!mFieldCount) {
         if (mComponent.isReference()) {
             ObjectBase *const*obp = static_cast<ObjectBase *const*>(ptr);
             ObjectBase *ob = obp[0];
             if (ob) ob->incSysRef();
         }
         return;
     }

     const uint8_t *p = static_cast<const uint8_t *>(ptr);
     for (uint32_t i=0; i < mFieldCount; i++) {
         if (mFields[i].e->mHasReference) {
             const uint8_t *p2 = &p[mFields[i].offsetBits >> 3];
             for (uint32_t ct=0; ct < mFields[i].arraySize; ct++) {
                 mFields[i].e->incRefs(p2);
                 p2 += mFields[i].e->getSizeBytes();
             }
         }
     }
 }

 void Element::decRefs(const void *ptr) const {
     if (!mFieldCount) {
         if (mComponent.isReference()) {
             ObjectBase *const*obp = static_cast<ObjectBase *const*>(ptr);
             ObjectBase *ob = obp[0];
             if (ob) ob->decSysRef();
         }
         return;
     }

     const uint8_t *p = static_cast<const uint8_t *>(ptr);
     for (uint32_t i=0; i < mFieldCount; i++) {
         if (mFields[i].e->mHasReference) {
             const uint8_t *p2 = &p[mFields[i].offsetBits >> 3];
             for (uint32_t ct=0; ct < mFields[i].arraySize; ct++) {
                 mFields[i].e->decRefs(p2);
                 p2 += mFields[i].e->getSizeBytes();
             }
         }
     }
 }


 ElementState::ElementState() {
     const uint32_t initialCapacity = 32;
     mBuilderElements.setCapacity(initialCapacity);
     mBuilderNameStrings.setCapacity(initialCapacity);
     mBuilderNameLengths.setCapacity(initialCapacity);
     mBuilderArrays.setCapacity(initialCapacity);
 }

 ElementState::~ElementState() {
     rsAssert(!mElements.size());
 }

 void ElementState::elementBuilderBegin() {
     mBuilderElements.clear();
     mBuilderNameStrings.clear();
     mBuilderNameLengths.clear();
     mBuilderArrays.clear();
 }

 void ElementState::elementBuilderAdd(const Element *e, const char *nameStr, uint32_t arraySize) {
     mBuilderElements.push(e);
     mBuilderNameStrings.push(nameStr);
     mBuilderNameLengths.push(strlen(nameStr));
     mBuilderArrays.push(arraySize);

 }

 const Element *ElementState::elementBuilderCreate(Context *rsc) {
     return Element::create(rsc, mBuilderElements.size(),
                                 &(mBuilderElements.editArray()[0]),
                                 &(mBuilderNameStrings.editArray()[0]),
                                 mBuilderNameLengths.editArray(),
                                 mBuilderArrays.editArray());
 }


 /////////////////////////////////////////
 //

 namespace android {
 namespace renderscript {

 RsElement rsi_ElementCreate(Context *rsc,
                             RsDataType dt,
                             RsDataKind dk,
                             bool norm,
                             uint32_t vecSize) {
     const Element *e = Element::create(rsc, dt, dk, norm, vecSize);
     e->incUserRef();
     return (RsElement)e;
 }


 RsElement rsi_ElementCreate2(Context *rsc,
                              const RsElement * ein,
                              size_t ein_length,

                              const char ** names,
                              size_t nameLengths_length,
                              const size_t * nameLengths,

                              const uint32_t * arraySizes,
                              size_t arraySizes_length) {
     const Element *e = Element::create(rsc, ein_length, (const Element **)ein, names, nameLengths, arraySizes);
     e->incUserRef();
     return (RsElement)e;
 }

 }
 }

 void rsaElementGetNativeData(RsContext con, RsElement elem, uint32_t *elemData, uint32_t elemDataSize) {
     rsAssert(elemDataSize == 5);
     // we will pack mType; mKind; mNormalized; mVectorSize; NumSubElements
     Element *e = static_cast<Element *>(elem);

     (*elemData++) = (uint32_t)e->getType();
     (*elemData++) = (uint32_t)e->getKind();
     (*elemData++) = e->getComponent().getIsNormalized() ? 1 : 0;
     (*elemData++) = e->getComponent().getVectorSize();
     (*elemData++) = e->getFieldCount();
 }

 void rsaElementGetSubElements(RsContext con, RsElement elem, uint32_t *ids, const char **names, uint32_t dataSize) {
     Element *e = static_cast<Element *>(elem);
     rsAssert(e->getFieldCount() == dataSize);

     for (uint32_t i = 0; i < dataSize; i ++) {
         e->getField(i)->incUserRef();
         ids[i] = (uint32_t)e->getField(i);
         names[i] = e->getFieldName(i);
     }
 }
	/*
	* Copyright (C) 2009 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/


	#include "rsContext.h"

	using namespace android;
	using namespace android::renderscript;


	Element::Element(Context *rsc) : ObjectBase(rsc) {
	mBits = 0;
	mFields = NULL;
	mFieldCount = 0;
	mHasReference = false;
	}

	Element::~Element() {
	for (uint32_t ct = 0; ct < mRSC->mStateElement.mElements.size(); ct++) {
	if (mRSC->mStateElement.mElements[ct] == this) {
	mRSC->mStateElement.mElements.removeAt(ct);
	break;
	}
	}
	clear();
	}

	void Element::clear() {
	delete [] mFields;
	mFields = NULL;
	mFieldCount = 0;
	mHasReference = false;
	}

	size_t Element::getSizeBits() const {
	if (!mFieldCount) {
	return mBits;
	}

	size_t total = 0;
	for (size_t ct=0; ct < mFieldCount; ct++) {
	total += mFields[ct].e->mBits * mFields[ct].arraySize;
	}
	return total;
	}

	void Element::dumpLOGV(const char *prefix) const {
	ObjectBase::dumpLOGV(prefix);
	LOGV("%s Element: fieldCount: %zu, size bytes: %zu", prefix, mFieldCount, getSizeBytes());
	for (uint32_t ct = 0; ct < mFieldCount; ct++) {
	LOGV("%s Element field index: %u ------------------", prefix, ct);
	LOGV("%s name: %s, offsetBits: %u, arraySize: %u",
	prefix, mFields[ct].name.string(), mFields[ct].offsetBits, mFields[ct].arraySize);
	mFields[ct].e->dumpLOGV(prefix);
	}
	}

	void Element::serialize(OStream *stream) const {
	// Need to identify ourselves
	stream->addU32((uint32_t)getClassId());

	String8 name(getName());
	stream->addString(&name);

	mComponent.serialize(stream);

	// Now serialize all the fields
	stream->addU32(mFieldCount);
	for (uint32_t ct = 0; ct < mFieldCount; ct++) {
	stream->addString(&mFields[ct].name);
	stream->addU32(mFields[ct].arraySize);
	mFields[ct].e->serialize(stream);
	}
	}

	Element Element::createFromStream(Context rsc, IStream *stream) {
	// First make sure we are reading the correct object
	RsA3DClassID classID = (RsA3DClassID)stream->loadU32();
	if (classID != RS_A3D_CLASS_ID_ELEMENT) {
	LOGE("element loading skipped due to invalid class id\n");
	return NULL;
	}

	String8 name;
	stream->loadString(&name);

	Element *elem = new Element(rsc);
	elem->mComponent.loadFromStream(stream);

	elem->mFieldCount = stream->loadU32();
	if (elem->mFieldCount) {
	elem->mFields = new ElementField_t [elem->mFieldCount];
	for (uint32_t ct = 0; ct < elem->mFieldCount; ct ++) {
	stream->loadString(&elem->mFields[ct].name);
	elem->mFields[ct].arraySize = stream->loadU32();
	Element *fieldElem = Element::createFromStream(rsc, stream);
	elem->mFields[ct].e.set(fieldElem);
	}
	}

	// We need to check if this already exists
	for (uint32_t ct=0; ct < rsc->mStateElement.mElements.size(); ct++) {
	Element *ee = rsc->mStateElement.mElements[ct];
	if (ee->isEqual(elem)) {
	ObjectBase::checkDelete(elem);
	ee->incUserRef();
	return ee;
	}
	}

	elem->compute();
	rsc->mStateElement.mElements.push(elem);
	return elem;
	}

	bool Element::isEqual(const Element *other) const {
	if (other == NULL) {
	return false;
	}
	if (!other->getFieldCount() && !mFieldCount) {
	if ((other->getType() == getType()) &&
	(other->getKind() == getKind()) &&
	(other->getComponent().getIsNormalized() == getComponent().getIsNormalized()) &&
	(other->getComponent().getVectorSize() == getComponent().getVectorSize())) {
	return true;
	}
	return false;
	}
	if (other->getFieldCount() == mFieldCount) {
	for (uint32_t i=0; i < mFieldCount; i++) {
	if ((!other->mFields[i].e->isEqual(mFields[i].e.get())) \|\|
	(other->mFields[i].name.length() != mFields[i].name.length()) \|\|
	(other->mFields[i].name != mFields[i].name) \|\|
	(other->mFields[i].arraySize != mFields[i].arraySize)) {
	return false;
	}
	}
	return true;
	}
	return false;
	}

	void Element::compute() {
	if (mFieldCount == 0) {
	mBits = mComponent.getBits();
	mHasReference = mComponent.isReference();
	return;
	}

	size_t bits = 0;
	for (size_t ct=0; ct < mFieldCount; ct++) {
	mFields[ct].offsetBits = bits;
	bits += mFields[ct].e->getSizeBits() * mFields[ct].arraySize;

	if (mFields[ct].e->mHasReference) {
	mHasReference = true;
	}
	}

	}

	const Element * Element::create(Context *rsc, RsDataType dt, RsDataKind dk,
	bool isNorm, uint32_t vecSize) {
	// Look for an existing match.
	for (uint32_t ct=0; ct < rsc->mStateElement.mElements.size(); ct++) {
	const Element *ee = rsc->mStateElement.mElements[ct];
	if (!ee->getFieldCount() &&
	(ee->getComponent().getType() == dt) &&
	(ee->getComponent().getKind() == dk) &&
	(ee->getComponent().getIsNormalized() == isNorm) &&
	(ee->getComponent().getVectorSize() == vecSize)) {
	// Match
	ee->incUserRef();
	return ee;
	}
	}

	Element *e = new Element(rsc);
	e->mComponent.set(dt, dk, isNorm, vecSize);
	e->compute();
	rsc->mStateElement.mElements.push(e);
	return e;
	}

	const Element * Element::create(Context rsc, size_t count, const Element *ein,
	const char *nin, const size_t lengths, const uint32_t *asin) {
	// Look for an existing match.
	for (uint32_t ct=0; ct < rsc->mStateElement.mElements.size(); ct++) {
	const Element *ee = rsc->mStateElement.mElements[ct];
	if (ee->getFieldCount() == count) {
	bool match = true;
	for (uint32_t i=0; i < count; i++) {
	if ((ee->mFields[i].e.get() != ein[i]) \|\|
	(ee->mFields[i].name.length() != lengths[i]) \|\|
	(ee->mFields[i].name != nin[i]) \|\|
	(ee->mFields[i].arraySize != asin[i])) {
	match = false;
	break;
	}
	}
	if (match) {
	ee->incUserRef();
	return ee;
	}
	}
	}

	Element *e = new Element(rsc);
	e->mFields = new ElementField_t [count];
	e->mFieldCount = count;
	for (size_t ct=0; ct < count; ct++) {
	e->mFields[ct].e.set(ein[ct]);
	e->mFields[ct].name.setTo(nin[ct], lengths[ct]);
	e->mFields[ct].arraySize = asin[ct];
	}
	e->compute();

	rsc->mStateElement.mElements.push(e);
	return e;
	}

	String8 Element::getGLSLType(uint32_t indent) const {
	String8 s;
	for (uint32_t ct=0; ct < indent; ct++) {
	s.append(" ");
	}

	if (!mFieldCount) {
	// Basic component.
	s.append(mComponent.getGLSLType());
	} else {
	rsAssert(0);
	//s.append("struct ");
	//s.append(getCStructBody(indent));
	}

	return s;
	}

	void Element::incRefs(const void *ptr) const {
	if (!mFieldCount) {
	if (mComponent.isReference()) {
	ObjectBase constobp = static_cast<ObjectBase const>(ptr);
	ObjectBase *ob = obp[0];
	if (ob) ob->incSysRef();
	}
	return;
	}

	const uint8_t p = static_cast<const uint8_t >(ptr);
	for (uint32_t i=0; i < mFieldCount; i++) {
	if (mFields[i].e->mHasReference) {
	const uint8_t *p2 = &p[mFields[i].offsetBits >> 3];
	for (uint32_t ct=0; ct < mFields[i].arraySize; ct++) {
	mFields[i].e->incRefs(p2);
	p2 += mFields[i].e->getSizeBytes();
	}
	}
	}
	}

	void Element::decRefs(const void *ptr) const {
	if (!mFieldCount) {
	if (mComponent.isReference()) {
	ObjectBase constobp = static_cast<ObjectBase const>(ptr);
	ObjectBase *ob = obp[0];
	if (ob) ob->decSysRef();
	}
	return;
	}

	const uint8_t p = static_cast<const uint8_t >(ptr);
	for (uint32_t i=0; i < mFieldCount; i++) {
	if (mFields[i].e->mHasReference) {
	const uint8_t *p2 = &p[mFields[i].offsetBits >> 3];
	for (uint32_t ct=0; ct < mFields[i].arraySize; ct++) {
	mFields[i].e->decRefs(p2);
	p2 += mFields[i].e->getSizeBytes();
	}
	}
	}
	}


	ElementState::ElementState() {
	const uint32_t initialCapacity = 32;
	mBuilderElements.setCapacity(initialCapacity);
	mBuilderNameStrings.setCapacity(initialCapacity);
	mBuilderNameLengths.setCapacity(initialCapacity);
	mBuilderArrays.setCapacity(initialCapacity);
	}

	ElementState::~ElementState() {
	rsAssert(!mElements.size());
	}

	void ElementState::elementBuilderBegin() {
	mBuilderElements.clear();
	mBuilderNameStrings.clear();
	mBuilderNameLengths.clear();
	mBuilderArrays.clear();
	}

	void ElementState::elementBuilderAdd(const Element e, const char nameStr, uint32_t arraySize) {
	mBuilderElements.push(e);
	mBuilderNameStrings.push(nameStr);
	mBuilderNameLengths.push(strlen(nameStr));
	mBuilderArrays.push(arraySize);

	}

	const Element ElementState::elementBuilderCreate(Context rsc) {
	return Element::create(rsc, mBuilderElements.size(),
	&(mBuilderElements.editArray()[0]),
	&(mBuilderNameStrings.editArray()[0]),
	mBuilderNameLengths.editArray(),
	mBuilderArrays.editArray());
	}


	/////////////////////////////////////////
	//

	namespace android {
	namespace renderscript {

	RsElement rsi_ElementCreate(Context *rsc,
	RsDataType dt,
	RsDataKind dk,
	bool norm,
	uint32_t vecSize) {
	const Element *e = Element::create(rsc, dt, dk, norm, vecSize);
	e->incUserRef();
	return (RsElement)e;
	}


	RsElement rsi_ElementCreate2(Context *rsc,
	const RsElement * ein,
	size_t ein_length,

	const char ** names,
	size_t nameLengths_length,
	const size_t * nameLengths,

	const uint32_t * arraySizes,
	size_t arraySizes_length) {
	const Element e = Element::create(rsc, ein_length, (const Element *)ein, names, nameLengths, arraySizes);
	e->incUserRef();
	return (RsElement)e;
	}

	}
	}

	void rsaElementGetNativeData(RsContext con, RsElement elem, uint32_t *elemData, uint32_t elemDataSize) {
	rsAssert(elemDataSize == 5);
	// we will pack mType; mKind; mNormalized; mVectorSize; NumSubElements
	Element e = static_cast<Element >(elem);

	(*elemData++) = (uint32_t)e->getType();
	(*elemData++) = (uint32_t)e->getKind();
	(*elemData++) = e->getComponent().getIsNormalized() ? 1 : 0;
	(*elemData++) = e->getComponent().getVectorSize();
	(*elemData++) = e->getFieldCount();
	}

	void rsaElementGetSubElements(RsContext con, RsElement elem, uint32_t ids, const char *names, uint32_t dataSize) {
	Element e = static_cast<Element >(elem);
	rsAssert(e->getFieldCount() == dataSize);

	for (uint32_t i = 0; i < dataSize; i ++) {
	e->getField(i)->incUserRef();
	ids[i] = (uint32_t)e->getField(i);
	names[i] = e->getFieldName(i);
	}
	}