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