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source: code/trunk/src/external/bullet/LinearMath/btSerializer.h @ 10096

Last change on this file since 10096 was 8393, checked in by rgrieder, 14 years ago

Updated Bullet from v2.77 to v2.78.
(I'm not going to make a branch for that since the update from 2.74 to 2.77 hasn't been tested that much either).

You will HAVE to do a complete RECOMPILE! I tested with MSVC and MinGW and they both threw linker errors at me.

Property svn:eol-style set to native

File size: 13.1 KB

Rev	Line
[7983]	1	/*
	2	Bullet Continuous Collision Detection and Physics Library
	3	Copyright (c) 2003-2009 Erwin Coumans http://bulletphysics.org
	4
	5	This software is provided 'as-is', without any express or implied warranty.
	6	In no event will the authors be held liable for any damages arising from the use of this software.
	7	Permission is granted to anyone to use this software for any purpose,
	8	including commercial applications, and to alter it and redistribute it freely,
	9	subject to the following restrictions:
	10
	11	1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
	12	2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
	13	3. This notice may not be removed or altered from any source distribution.
	14	*/
	15
	16	#ifndef BT_SERIALIZER_H
	17	#define BT_SERIALIZER_H
	18
	19	#include "btScalar.h" // has definitions like SIMD_FORCE_INLINE
	20	#include "btStackAlloc.h"
	21	#include "btHashMap.h"
	22
	23	#if !defined( __CELLOS_LV2__) && !defined(__MWERKS__)
	24	#include <memory.h>
	25	#endif
	26	#include <string.h>
	27
	28
	29
	30	///only the 32bit versions for now
	31	extern unsigned char sBulletDNAstr[];
	32	extern int sBulletDNAlen;
	33	extern unsigned char sBulletDNAstr64[];
	34	extern int sBulletDNAlen64;
	35
	36	SIMD_FORCE_INLINE int btStrLen(const char* str)
	37	{
	38	if (!str)
	39	return(0);
	40	int len = 0;
	41
	42	while (*str != 0)
	43	{
	44	str++;
	45	len++;
	46	}
	47
	48	return len;
	49	}
	50
	51
	52	class btChunk
	53	{
	54	public:
	55	int m_chunkCode;
	56	int m_length;
	57	void *m_oldPtr;
	58	int m_dna_nr;
	59	int m_number;
	60	};
	61
	62	enum btSerializationFlags
	63	{
	64	BT_SERIALIZE_NO_BVH = 1,
	65	BT_SERIALIZE_NO_TRIANGLEINFOMAP = 2,
	66	BT_SERIALIZE_NO_DUPLICATE_ASSERT = 4
	67	};
	68
	69	class btSerializer
	70	{
	71
	72	public:
	73
	74	virtual ~btSerializer() {}
	75
	76	virtual const unsigned char* getBufferPointer() const = 0;
	77
	78	virtual int getCurrentBufferSize() const = 0;
	79
	80	virtual btChunk* allocate(size_t size, int numElements) = 0;
	81
	82	virtual void finalizeChunk(btChunk* chunk, const char* structType, int chunkCode,void* oldPtr)= 0;
	83
	84	virtual void* findPointer(void* oldPtr) = 0;
	85
	86	virtual void* getUniquePointer(void*oldPtr) = 0;
	87
	88	virtual void startSerialization() = 0;
	89
	90	virtual void finishSerialization() = 0;
	91
	92	virtual const char* findNameForPointer(const void* ptr) const = 0;
	93
	94	virtual void registerNameForPointer(const void* ptr, const char* name) = 0;
	95
	96	virtual void serializeName(const char* ptr) = 0;
	97
	98	virtual int getSerializationFlags() const = 0;
	99
	100	virtual void setSerializationFlags(int flags) = 0;
	101
	102
	103	};
	104
	105
	106
	107	#define BT_HEADER_LENGTH 12
	108	#if defined(__sgi) \|\| defined (__sparc) \|\| defined (__sparc__) \|\| defined (__PPC__) \|\| defined (__ppc__) \|\| defined (__BIG_ENDIAN__)
	109	# define MAKE_ID(a,b,c,d) ( (int)(a)<<24 \| (int)(b)<<16 \| (c)<<8 \| (d) )
	110	#else
	111	# define MAKE_ID(a,b,c,d) ( (int)(d)<<24 \| (int)(c)<<16 \| (b)<<8 \| (a) )
	112	#endif
	113
[8393]	114	#define BT_SOFTBODY_CODE MAKE_ID('S','B','D','Y')
[7983]	115	#define BT_COLLISIONOBJECT_CODE MAKE_ID('C','O','B','J')
	116	#define BT_RIGIDBODY_CODE MAKE_ID('R','B','D','Y')
	117	#define BT_CONSTRAINT_CODE MAKE_ID('C','O','N','S')
	118	#define BT_BOXSHAPE_CODE MAKE_ID('B','O','X','S')
	119	#define BT_QUANTIZED_BVH_CODE MAKE_ID('Q','B','V','H')
	120	#define BT_TRIANLGE_INFO_MAP MAKE_ID('T','M','A','P')
	121	#define BT_SHAPE_CODE MAKE_ID('S','H','A','P')
	122	#define BT_ARRAY_CODE MAKE_ID('A','R','A','Y')
[8393]	123	#define BT_SBMATERIAL_CODE MAKE_ID('S','B','M','T')
	124	#define BT_SBNODE_CODE MAKE_ID('S','B','N','D')
[7983]	125	#define BT_DNA_CODE MAKE_ID('D','N','A','1')
	126
	127
	128	struct btPointerUid
	129	{
	130	union
	131	{
	132	void* m_ptr;
	133	int m_uniqueIds[2];
	134	};
	135	};
	136
[8393]	137	///The btDefaultSerializer is the main Bullet serialization class.
	138	///The constructor takes an optional argument for backwards compatibility, it is recommended to leave this empty/zero.
[7983]	139	class btDefaultSerializer : public btSerializer
	140	{
	141
	142
	143	btAlignedObjectArray<char*> mTypes;
	144	btAlignedObjectArray<short*> mStructs;
	145	btAlignedObjectArray<short> mTlens;
	146	btHashMap<btHashInt, int> mStructReverse;
	147	btHashMap<btHashString,int> mTypeLookup;
	148
	149
	150	btHashMap<btHashPtr,void*> m_chunkP;
	151
	152	btHashMap<btHashPtr,const char*> m_nameMap;
	153
	154	btHashMap<btHashPtr,btPointerUid> m_uniquePointers;
	155	int m_uniqueIdGenerator;
	156
	157	int m_totalSize;
	158	unsigned char* m_buffer;
	159	int m_currentSize;
	160	void* m_dna;
	161	int m_dnaLength;
	162
	163	int m_serializationFlags;
	164
	165
	166	btAlignedObjectArray<btChunk*> m_chunkPtrs;
	167
	168	protected:
	169
	170	virtual void* findPointer(void* oldPtr)
	171	{
	172	void** ptr = m_chunkP.find(oldPtr);
	173	if (ptr && *ptr)
	174	return *ptr;
	175	return 0;
	176	}
	177
	178
	179
	180
	181
	182	void writeDNA()
	183	{
	184	btChunk* dnaChunk = allocate(m_dnaLength,1);
	185	memcpy(dnaChunk->m_oldPtr,m_dna,m_dnaLength);
	186	finalizeChunk(dnaChunk,"DNA1",BT_DNA_CODE, m_dna);
	187	}
	188
	189	int getReverseType(const char *type) const
	190	{
	191
	192	btHashString key(type);
	193	const int* valuePtr = mTypeLookup.find(key);
	194	if (valuePtr)
	195	return *valuePtr;
	196
	197	return -1;
	198	}
	199
	200	void initDNA(const char* bdnaOrg,int dnalen)
	201	{
	202	///was already initialized
	203	if (m_dna)
	204	return;
	205
	206	int littleEndian= 1;
	207	littleEndian= ((char*)&littleEndian)[0];
	208
	209
	210	m_dna = btAlignedAlloc(dnalen,16);
	211	memcpy(m_dna,bdnaOrg,dnalen);
	212	m_dnaLength = dnalen;
	213
	214	int *intPtr=0;
	215	short *shtPtr=0;
	216	char *cp = 0;int dataLen =0;long nr=0;
	217	intPtr = (int*)m_dna;
	218
	219	/*
	220	SDNA (4 bytes) (magic number)
	221	NAME (4 bytes)
	222	<nr> (4 bytes) amount of names (int)
	223	<string>
	224	<string>
	225	*/
	226
	227	if (strncmp((const char*)m_dna, "SDNA", 4)==0)
	228	{
	229	// skip ++ NAME
	230	intPtr++; intPtr++;
	231	}
	232
	233	// Parse names
	234	if (!littleEndian)
	235	intPtr = btSwapEndian(intPtr);
	236
	237	dataLen = *intPtr;
	238
	239	intPtr++;
	240
	241	cp = (char*)intPtr;
	242	int i;
	243	for ( i=0; i<dataLen; i++)
	244	{
	245
	246	while (*cp)cp++;
	247	cp++;
	248	}
	249	{
	250	nr= (long)cp;
	251	// long mask=3;
	252	nr= ((nr+3)&~3)-nr;
	253	while (nr--)
	254	{
	255	cp++;
	256	}
	257	}
	258
	259	/*
	260	TYPE (4 bytes)
	261	<nr> amount of types (int)
	262	<string>
	263	<string>
	264	*/
	265
	266	intPtr = (int*)cp;
	267	assert(strncmp(cp, "TYPE", 4)==0); intPtr++;
	268
	269	if (!littleEndian)
	270	intPtr = btSwapEndian(intPtr);
	271
	272	dataLen = *intPtr;
	273	intPtr++;
	274
	275
	276	cp = (char*)intPtr;
	277	for (i=0; i<dataLen; i++)
	278	{
	279	mTypes.push_back(cp);
	280	while (*cp)cp++;
	281	cp++;
	282	}
	283
	284	{
	285	nr= (long)cp;
	286	// long mask=3;
	287	nr= ((nr+3)&~3)-nr;
	288	while (nr--)
	289	{
	290	cp++;
	291	}
	292	}
	293
	294
	295	/*
	296	TLEN (4 bytes)
	297	<len> (short) the lengths of types
	298	<len>
	299	*/
	300
	301	// Parse type lens
	302	intPtr = (int*)cp;
	303	assert(strncmp(cp, "TLEN", 4)==0); intPtr++;
	304
	305	dataLen = (int)mTypes.size();
	306
	307	shtPtr = (short*)intPtr;
	308	for (i=0; i<dataLen; i++, shtPtr++)
	309	{
	310	if (!littleEndian)
	311	shtPtr[0] = btSwapEndian(shtPtr[0]);
	312	mTlens.push_back(shtPtr[0]);
	313	}
	314
	315	if (dataLen & 1) shtPtr++;
	316
	317	/*
	318	STRC (4 bytes)
	319	<nr> amount of structs (int)
	320	<typenr>
	321	<nr_of_elems>
	322	<typenr>
	323	<namenr>
	324	<typenr>
	325	<namenr>
	326	*/
	327
	328	intPtr = (int*)shtPtr;
	329	cp = (char*)intPtr;
	330	assert(strncmp(cp, "STRC", 4)==0); intPtr++;
	331
	332	if (!littleEndian)
	333	intPtr = btSwapEndian(intPtr);
	334	dataLen = *intPtr ;
	335	intPtr++;
	336
	337
	338	shtPtr = (short*)intPtr;
	339	for (i=0; i<dataLen; i++)
	340	{
	341	mStructs.push_back (shtPtr);
	342
	343	if (!littleEndian)
	344	{
	345	shtPtr[0]= btSwapEndian(shtPtr[0]);
	346	shtPtr[1]= btSwapEndian(shtPtr[1]);
	347
	348	int len = shtPtr[1];
	349	shtPtr+= 2;
	350
	351	for (int a=0; a<len; a++, shtPtr+=2)
	352	{
	353	shtPtr[0]= btSwapEndian(shtPtr[0]);
	354	shtPtr[1]= btSwapEndian(shtPtr[1]);
	355	}
	356
	357	} else
	358	{
	359	shtPtr+= (2*shtPtr[1])+2;
	360	}
	361	}
	362
	363	// build reverse lookups
	364	for (i=0; i<(int)mStructs.size(); i++)
	365	{
	366	short *strc = mStructs.at(i);
	367	mStructReverse.insert(strc[0], i);
	368	mTypeLookup.insert(btHashString(mTypes[strc[0]]),i);
	369	}
	370	}
	371
	372	public:
	373
	374
	375
	376
[8393]	377	btDefaultSerializer(int totalSize=0)
[7983]	378	:m_totalSize(totalSize),
	379	m_currentSize(0),
	380	m_dna(0),
	381	m_dnaLength(0),
	382	m_serializationFlags(0)
	383	{
[8393]	384	m_buffer = m_totalSize?(unsigned char*)btAlignedAlloc(totalSize,16):0;
[7983]	385
	386	const bool VOID_IS_8 = ((sizeof(void*)==8));
	387
	388	#ifdef BT_INTERNAL_UPDATE_SERIALIZATION_STRUCTURES
	389	if (VOID_IS_8)
	390	{
	391	#if _WIN64
	392	initDNA((const char*)sBulletDNAstr64,sBulletDNAlen64);
	393	#else
	394	btAssert(0);
	395	#endif
	396	} else
	397	{
	398	#ifndef _WIN64
	399	initDNA((const char*)sBulletDNAstr,sBulletDNAlen);
	400	#else
	401	btAssert(0);
	402	#endif
	403	}
	404
	405	#else //BT_INTERNAL_UPDATE_SERIALIZATION_STRUCTURES
	406	if (VOID_IS_8)
	407	{
	408	initDNA((const char*)sBulletDNAstr64,sBulletDNAlen64);
	409	} else
	410	{
	411	initDNA((const char*)sBulletDNAstr,sBulletDNAlen);
	412	}
	413	#endif //BT_INTERNAL_UPDATE_SERIALIZATION_STRUCTURES
	414
	415	}
	416
	417	virtual ~btDefaultSerializer()
	418	{
	419	if (m_buffer)
	420	btAlignedFree(m_buffer);
	421	if (m_dna)
	422	btAlignedFree(m_dna);
	423	}
	424
[8393]	425	void writeHeader(unsigned char* buffer) const
[7983]	426	{
[8393]	427
[7983]	428
	429	#ifdef BT_USE_DOUBLE_PRECISION
[8393]	430	memcpy(buffer, "BULLETd", 7);
[7983]	431	#else
[8393]	432	memcpy(buffer, "BULLETf", 7);
[7983]	433	#endif //BT_USE_DOUBLE_PRECISION
	434
	435	int littleEndian= 1;
	436	littleEndian= ((char*)&littleEndian)[0];
	437
	438	if (sizeof(void*)==8)
	439	{
[8393]	440	buffer[7] = '-';
[7983]	441	} else
	442	{
[8393]	443	buffer[7] = '_';
[7983]	444	}
	445
	446	if (littleEndian)
	447	{
[8393]	448	buffer[8]='v';
[7983]	449	} else
	450	{
[8393]	451	buffer[8]='V';
[7983]	452	}
	453
	454
[8393]	455	buffer[9] = '2';
	456	buffer[10] = '7';
	457	buffer[11] = '8';
[7983]	458
[8393]	459	}
	460
	461	virtual void startSerialization()
	462	{
	463	m_uniqueIdGenerator= 1;
	464	if (m_totalSize)
	465	{
	466	unsigned char* buffer = internalAlloc(BT_HEADER_LENGTH);
	467	writeHeader(buffer);
	468	}
[7983]	469
	470	}
	471
	472	virtual void finishSerialization()
	473	{
	474	writeDNA();
	475
[8393]	476	//if we didn't pre-allocate a buffer, we need to create a contiguous buffer now
	477	int mysize = 0;
	478	if (!m_totalSize)
	479	{
	480	if (m_buffer)
	481	btAlignedFree(m_buffer);
[7983]	482
[8393]	483	m_currentSize += BT_HEADER_LENGTH;
	484	m_buffer = (unsigned char*)btAlignedAlloc(m_currentSize,16);
	485
	486	unsigned char* currentPtr = m_buffer;
	487	writeHeader(m_buffer);
	488	currentPtr += BT_HEADER_LENGTH;
	489	mysize+=BT_HEADER_LENGTH;
	490	for (int i=0;i< m_chunkPtrs.size();i++)
	491	{
	492	int curLength = sizeof(btChunk)+m_chunkPtrs[i]->m_length;
	493	memcpy(currentPtr,m_chunkPtrs[i], curLength);
	494	btAlignedFree(m_chunkPtrs[i]);
	495	currentPtr+=curLength;
	496	mysize+=curLength;
	497	}
	498	}
	499
[7983]	500	mTypes.clear();
	501	mStructs.clear();
	502	mTlens.clear();
	503	mStructReverse.clear();
	504	mTypeLookup.clear();
	505	m_chunkP.clear();
	506	m_nameMap.clear();
	507	m_uniquePointers.clear();
[8393]	508	m_chunkPtrs.clear();
[7983]	509	}
	510
	511	virtual void* getUniquePointer(void*oldPtr)
	512	{
	513	if (!oldPtr)
	514	return 0;
	515
	516	btPointerUid* uptr = (btPointerUid*)m_uniquePointers.find(oldPtr);
	517	if (uptr)
	518	{
	519	return uptr->m_ptr;
	520	}
	521	m_uniqueIdGenerator++;
	522
	523	btPointerUid uid;
	524	uid.m_uniqueIds[0] = m_uniqueIdGenerator;
	525	uid.m_uniqueIds[1] = m_uniqueIdGenerator;
	526	m_uniquePointers.insert(oldPtr,uid);
	527	return uid.m_ptr;
	528
	529	}
	530
	531	virtual const unsigned char* getBufferPointer() const
	532	{
	533	return m_buffer;
	534	}
	535
	536	virtual int getCurrentBufferSize() const
	537	{
	538	return m_currentSize;
	539	}
	540
	541	virtual void finalizeChunk(btChunk* chunk, const char* structType, int chunkCode,void* oldPtr)
	542	{
	543	if (!(m_serializationFlags&BT_SERIALIZE_NO_DUPLICATE_ASSERT))
	544	{
	545	btAssert(!findPointer(oldPtr));
	546	}
	547
	548	chunk->m_dna_nr = getReverseType(structType);
	549
	550	chunk->m_chunkCode = chunkCode;
	551
	552	void* uniquePtr = getUniquePointer(oldPtr);
	553
	554	m_chunkP.insert(oldPtr,uniquePtr);//chunk->m_oldPtr);
	555	chunk->m_oldPtr = uniquePtr;//oldPtr;
	556
	557	}
	558
	559
[8393]	560	virtual unsigned char* internalAlloc(size_t size)
	561	{
	562	unsigned char* ptr = 0;
[7983]	563
[8393]	564	if (m_totalSize)
	565	{
	566	ptr = m_buffer+m_currentSize;
	567	m_currentSize += int(size);
	568	btAssert(m_currentSize<m_totalSize);
	569	} else
	570	{
	571	ptr = (unsigned char*)btAlignedAlloc(size,16);
	572	m_currentSize += int(size);
	573	}
	574	return ptr;
	575	}
	576
[7983]	577
	578
	579	virtual btChunk* allocate(size_t size, int numElements)
	580	{
	581
[8393]	582	unsigned char* ptr = internalAlloc(int(size)*numElements+sizeof(btChunk));
[7983]	583
	584	unsigned char* data = ptr + sizeof(btChunk);
	585
	586	btChunk* chunk = (btChunk*)ptr;
	587	chunk->m_chunkCode = 0;
	588	chunk->m_oldPtr = data;
	589	chunk->m_length = int(size)*numElements;
	590	chunk->m_number = numElements;
	591
	592	m_chunkPtrs.push_back(chunk);
	593
	594
	595	return chunk;
	596	}
	597
	598	virtual const char* findNameForPointer(const void* ptr) const
	599	{
	600	const charconst namePtr = m_nameMap.find(ptr);
	601	if (namePtr && *namePtr)
	602	return *namePtr;
	603	return 0;
	604
	605	}
	606
	607	virtual void registerNameForPointer(const void* ptr, const char* name)
	608	{
	609	m_nameMap.insert(ptr,name);
	610	}
	611
	612	virtual void serializeName(const char* name)
	613	{
	614	if (name)
	615	{
	616	//don't serialize name twice
	617	if (findPointer((void*)name))
	618	return;
	619
	620	int len = btStrLen(name);
	621	if (len)
	622	{
	623
	624	int newLen = len+1;
	625	int padding = ((newLen+3)&~3)-newLen;
	626	newLen += padding;
	627
	628	//serialize name string now
	629	btChunk* chunk = allocate(sizeof(char),newLen);
	630	char* destinationName = (char*)chunk->m_oldPtr;
	631	for (int i=0;i<len;i++)
	632	{
	633	destinationName[i] = name[i];
	634	}
	635	destinationName[len] = 0;
	636	finalizeChunk(chunk,"char",BT_ARRAY_CODE,(void*)name);
	637	}
	638	}
	639	}
	640
	641	virtual int getSerializationFlags() const
	642	{
	643	return m_serializationFlags;
	644	}
	645
	646	virtual void setSerializationFlags(int flags)
	647	{
	648	m_serializationFlags = flags;
	649	}
	650
	651	};
	652
	653
	654	#endif //BT_SERIALIZER_H
	655

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