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_SOFTBODY_CODE MAKE_ID('S','B','D','Y') |
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115 | #define BT_COLLISIONOBJECT_CODE MAKE_ID('C','O','B','J') |
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116 | #define BT_RIGIDBODY_CODE MAKE_ID('R','B','D','Y') |
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117 | #define BT_CONSTRAINT_CODE MAKE_ID('C','O','N','S') |
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118 | #define BT_BOXSHAPE_CODE MAKE_ID('B','O','X','S') |
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119 | #define BT_QUANTIZED_BVH_CODE MAKE_ID('Q','B','V','H') |
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120 | #define BT_TRIANLGE_INFO_MAP MAKE_ID('T','M','A','P') |
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121 | #define BT_SHAPE_CODE MAKE_ID('S','H','A','P') |
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122 | #define BT_ARRAY_CODE MAKE_ID('A','R','A','Y') |
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123 | #define BT_SBMATERIAL_CODE MAKE_ID('S','B','M','T') |
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124 | #define BT_SBNODE_CODE MAKE_ID('S','B','N','D') |
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125 | #define BT_DNA_CODE MAKE_ID('D','N','A','1') |
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126 | |
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127 | |
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128 | struct btPointerUid |
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129 | { |
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130 | union |
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131 | { |
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132 | void* m_ptr; |
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133 | int m_uniqueIds[2]; |
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134 | }; |
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135 | }; |
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136 | |
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137 | ///The btDefaultSerializer is the main Bullet serialization class. |
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138 | ///The constructor takes an optional argument for backwards compatibility, it is recommended to leave this empty/zero. |
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139 | class btDefaultSerializer : public btSerializer |
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140 | { |
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141 | |
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142 | |
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143 | btAlignedObjectArray<char*> mTypes; |
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144 | btAlignedObjectArray<short*> mStructs; |
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145 | btAlignedObjectArray<short> mTlens; |
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146 | btHashMap<btHashInt, int> mStructReverse; |
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147 | btHashMap<btHashString,int> mTypeLookup; |
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148 | |
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149 | |
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150 | btHashMap<btHashPtr,void*> m_chunkP; |
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151 | |
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152 | btHashMap<btHashPtr,const char*> m_nameMap; |
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153 | |
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154 | btHashMap<btHashPtr,btPointerUid> m_uniquePointers; |
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155 | int m_uniqueIdGenerator; |
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156 | |
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157 | int m_totalSize; |
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158 | unsigned char* m_buffer; |
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159 | int m_currentSize; |
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160 | void* m_dna; |
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161 | int m_dnaLength; |
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162 | |
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163 | int m_serializationFlags; |
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164 | |
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165 | |
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166 | btAlignedObjectArray<btChunk*> m_chunkPtrs; |
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167 | |
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168 | protected: |
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169 | |
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170 | virtual void* findPointer(void* oldPtr) |
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171 | { |
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172 | void** ptr = m_chunkP.find(oldPtr); |
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173 | if (ptr && *ptr) |
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174 | return *ptr; |
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175 | return 0; |
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176 | } |
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177 | |
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178 | |
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179 | |
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180 | |
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181 | |
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182 | void writeDNA() |
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183 | { |
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184 | btChunk* dnaChunk = allocate(m_dnaLength,1); |
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185 | memcpy(dnaChunk->m_oldPtr,m_dna,m_dnaLength); |
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186 | finalizeChunk(dnaChunk,"DNA1",BT_DNA_CODE, m_dna); |
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187 | } |
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188 | |
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189 | int getReverseType(const char *type) const |
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190 | { |
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191 | |
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192 | btHashString key(type); |
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193 | const int* valuePtr = mTypeLookup.find(key); |
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194 | if (valuePtr) |
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195 | return *valuePtr; |
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196 | |
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197 | return -1; |
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198 | } |
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199 | |
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200 | void initDNA(const char* bdnaOrg,int dnalen) |
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201 | { |
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202 | ///was already initialized |
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203 | if (m_dna) |
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204 | return; |
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205 | |
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206 | int littleEndian= 1; |
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207 | littleEndian= ((char*)&littleEndian)[0]; |
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208 | |
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209 | |
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210 | m_dna = btAlignedAlloc(dnalen,16); |
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211 | memcpy(m_dna,bdnaOrg,dnalen); |
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212 | m_dnaLength = dnalen; |
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213 | |
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214 | int *intPtr=0; |
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215 | short *shtPtr=0; |
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216 | char *cp = 0;int dataLen =0;long nr=0; |
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217 | intPtr = (int*)m_dna; |
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218 | |
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219 | /* |
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220 | SDNA (4 bytes) (magic number) |
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221 | NAME (4 bytes) |
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222 | <nr> (4 bytes) amount of names (int) |
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223 | <string> |
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224 | <string> |
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225 | */ |
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226 | |
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227 | if (strncmp((const char*)m_dna, "SDNA", 4)==0) |
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228 | { |
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229 | // skip ++ NAME |
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230 | intPtr++; intPtr++; |
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231 | } |
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232 | |
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233 | // Parse names |
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234 | if (!littleEndian) |
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235 | *intPtr = btSwapEndian(*intPtr); |
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236 | |
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237 | dataLen = *intPtr; |
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238 | |
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239 | intPtr++; |
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240 | |
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241 | cp = (char*)intPtr; |
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242 | int i; |
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243 | for ( i=0; i<dataLen; i++) |
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244 | { |
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245 | |
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246 | while (*cp)cp++; |
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247 | cp++; |
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248 | } |
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249 | { |
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250 | nr= (long long)cp; |
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251 | // long mask=3; |
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252 | nr= ((nr+3)&~3)-nr; |
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253 | while (nr--) |
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254 | { |
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255 | cp++; |
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256 | } |
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257 | } |
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258 | |
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259 | /* |
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260 | TYPE (4 bytes) |
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261 | <nr> amount of types (int) |
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262 | <string> |
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263 | <string> |
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264 | */ |
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265 | |
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266 | intPtr = (int*)cp; |
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267 | assert(strncmp(cp, "TYPE", 4)==0); intPtr++; |
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268 | |
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269 | if (!littleEndian) |
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270 | *intPtr = btSwapEndian(*intPtr); |
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271 | |
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272 | dataLen = *intPtr; |
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273 | intPtr++; |
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274 | |
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275 | |
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276 | cp = (char*)intPtr; |
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277 | for (i=0; i<dataLen; i++) |
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278 | { |
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279 | mTypes.push_back(cp); |
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280 | while (*cp)cp++; |
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281 | cp++; |
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282 | } |
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283 | |
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284 | { |
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285 | nr= (long long)cp; |
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286 | // long mask=3; |
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287 | nr= ((nr+3)&~3)-nr; |
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288 | while (nr--) |
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289 | { |
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290 | cp++; |
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291 | } |
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292 | } |
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293 | |
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294 | |
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295 | /* |
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296 | TLEN (4 bytes) |
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297 | <len> (short) the lengths of types |
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298 | <len> |
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299 | */ |
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300 | |
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301 | // Parse type lens |
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302 | intPtr = (int*)cp; |
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303 | assert(strncmp(cp, "TLEN", 4)==0); intPtr++; |
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304 | |
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305 | dataLen = (int)mTypes.size(); |
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306 | |
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307 | shtPtr = (short*)intPtr; |
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308 | for (i=0; i<dataLen; i++, shtPtr++) |
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309 | { |
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310 | if (!littleEndian) |
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311 | shtPtr[0] = btSwapEndian(shtPtr[0]); |
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312 | mTlens.push_back(shtPtr[0]); |
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313 | } |
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314 | |
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315 | if (dataLen & 1) shtPtr++; |
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316 | |
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317 | /* |
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318 | STRC (4 bytes) |
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319 | <nr> amount of structs (int) |
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320 | <typenr> |
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321 | <nr_of_elems> |
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322 | <typenr> |
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323 | <namenr> |
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324 | <typenr> |
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325 | <namenr> |
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326 | */ |
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327 | |
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328 | intPtr = (int*)shtPtr; |
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329 | cp = (char*)intPtr; |
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330 | assert(strncmp(cp, "STRC", 4)==0); intPtr++; |
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331 | |
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332 | if (!littleEndian) |
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333 | *intPtr = btSwapEndian(*intPtr); |
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334 | dataLen = *intPtr ; |
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335 | intPtr++; |
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336 | |
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337 | |
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338 | shtPtr = (short*)intPtr; |
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339 | for (i=0; i<dataLen; i++) |
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340 | { |
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341 | mStructs.push_back (shtPtr); |
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342 | |
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343 | if (!littleEndian) |
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344 | { |
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345 | shtPtr[0]= btSwapEndian(shtPtr[0]); |
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346 | shtPtr[1]= btSwapEndian(shtPtr[1]); |
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347 | |
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348 | int len = shtPtr[1]; |
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349 | shtPtr+= 2; |
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350 | |
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351 | for (int a=0; a<len; a++, shtPtr+=2) |
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352 | { |
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353 | shtPtr[0]= btSwapEndian(shtPtr[0]); |
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354 | shtPtr[1]= btSwapEndian(shtPtr[1]); |
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355 | } |
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356 | |
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357 | } else |
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358 | { |
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359 | shtPtr+= (2*shtPtr[1])+2; |
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360 | } |
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361 | } |
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362 | |
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363 | // build reverse lookups |
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364 | for (i=0; i<(int)mStructs.size(); i++) |
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365 | { |
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366 | short *strc = mStructs.at(i); |
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367 | mStructReverse.insert(strc[0], i); |
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368 | mTypeLookup.insert(btHashString(mTypes[strc[0]]),i); |
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369 | } |
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370 | } |
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371 | |
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372 | public: |
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373 | |
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374 | |
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375 | |
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376 | |
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377 | btDefaultSerializer(int totalSize=0) |
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378 | :m_totalSize(totalSize), |
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379 | m_currentSize(0), |
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380 | m_dna(0), |
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381 | m_dnaLength(0), |
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382 | m_serializationFlags(0) |
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383 | { |
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384 | m_buffer = m_totalSize?(unsigned char*)btAlignedAlloc(totalSize,16):0; |
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385 | |
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386 | const bool VOID_IS_8 = ((sizeof(void*)==8)); |
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387 | |
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388 | #ifdef BT_INTERNAL_UPDATE_SERIALIZATION_STRUCTURES |
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389 | if (VOID_IS_8) |
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390 | { |
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391 | #if _WIN64 |
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392 | initDNA((const char*)sBulletDNAstr64,sBulletDNAlen64); |
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393 | #else |
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394 | btAssert(0); |
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395 | #endif |
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396 | } else |
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397 | { |
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398 | #ifndef _WIN64 |
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399 | initDNA((const char*)sBulletDNAstr,sBulletDNAlen); |
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400 | #else |
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401 | btAssert(0); |
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402 | #endif |
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403 | } |
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404 | |
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405 | #else //BT_INTERNAL_UPDATE_SERIALIZATION_STRUCTURES |
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406 | if (VOID_IS_8) |
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407 | { |
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408 | initDNA((const char*)sBulletDNAstr64,sBulletDNAlen64); |
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409 | } else |
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410 | { |
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411 | initDNA((const char*)sBulletDNAstr,sBulletDNAlen); |
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412 | } |
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413 | #endif //BT_INTERNAL_UPDATE_SERIALIZATION_STRUCTURES |
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414 | |
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415 | } |
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416 | |
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417 | virtual ~btDefaultSerializer() |
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418 | { |
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419 | if (m_buffer) |
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420 | btAlignedFree(m_buffer); |
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421 | if (m_dna) |
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422 | btAlignedFree(m_dna); |
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423 | } |
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424 | |
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425 | void writeHeader(unsigned char* buffer) const |
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426 | { |
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427 | |
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428 | |
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429 | #ifdef BT_USE_DOUBLE_PRECISION |
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430 | memcpy(buffer, "BULLETd", 7); |
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431 | #else |
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432 | memcpy(buffer, "BULLETf", 7); |
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433 | #endif //BT_USE_DOUBLE_PRECISION |
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434 | |
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435 | int littleEndian= 1; |
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436 | littleEndian= ((char*)&littleEndian)[0]; |
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437 | |
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438 | if (sizeof(void*)==8) |
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439 | { |
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440 | buffer[7] = '-'; |
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441 | } else |
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442 | { |
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443 | buffer[7] = '_'; |
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444 | } |
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445 | |
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446 | if (littleEndian) |
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447 | { |
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448 | buffer[8]='v'; |
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449 | } else |
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450 | { |
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451 | buffer[8]='V'; |
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452 | } |
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453 | |
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454 | |
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455 | buffer[9] = '2'; |
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456 | buffer[10] = '7'; |
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457 | buffer[11] = '8'; |
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458 | |
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459 | } |
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460 | |
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461 | virtual void startSerialization() |
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462 | { |
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463 | m_uniqueIdGenerator= 1; |
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464 | if (m_totalSize) |
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465 | { |
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466 | unsigned char* buffer = internalAlloc(BT_HEADER_LENGTH); |
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467 | writeHeader(buffer); |
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468 | } |
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469 | |
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470 | } |
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471 | |
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472 | virtual void finishSerialization() |
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473 | { |
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474 | writeDNA(); |
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475 | |
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476 | //if we didn't pre-allocate a buffer, we need to create a contiguous buffer now |
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477 | int mysize = 0; |
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478 | if (!m_totalSize) |
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479 | { |
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480 | if (m_buffer) |
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481 | btAlignedFree(m_buffer); |
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482 | |
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483 | m_currentSize += BT_HEADER_LENGTH; |
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484 | m_buffer = (unsigned char*)btAlignedAlloc(m_currentSize,16); |
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485 | |
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486 | unsigned char* currentPtr = m_buffer; |
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487 | writeHeader(m_buffer); |
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488 | currentPtr += BT_HEADER_LENGTH; |
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489 | mysize+=BT_HEADER_LENGTH; |
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490 | for (int i=0;i< m_chunkPtrs.size();i++) |
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491 | { |
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492 | int curLength = sizeof(btChunk)+m_chunkPtrs[i]->m_length; |
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493 | memcpy(currentPtr,m_chunkPtrs[i], curLength); |
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494 | btAlignedFree(m_chunkPtrs[i]); |
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495 | currentPtr+=curLength; |
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496 | mysize+=curLength; |
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497 | } |
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498 | } |
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499 | |
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500 | mTypes.clear(); |
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501 | mStructs.clear(); |
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502 | mTlens.clear(); |
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503 | mStructReverse.clear(); |
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504 | mTypeLookup.clear(); |
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505 | m_chunkP.clear(); |
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506 | m_nameMap.clear(); |
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507 | m_uniquePointers.clear(); |
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508 | m_chunkPtrs.clear(); |
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509 | } |
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510 | |
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511 | virtual void* getUniquePointer(void*oldPtr) |
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512 | { |
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513 | if (!oldPtr) |
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514 | return 0; |
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515 | |
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516 | btPointerUid* uptr = (btPointerUid*)m_uniquePointers.find(oldPtr); |
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517 | if (uptr) |
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518 | { |
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519 | return uptr->m_ptr; |
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520 | } |
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521 | m_uniqueIdGenerator++; |
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522 | |
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523 | btPointerUid uid; |
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524 | uid.m_uniqueIds[0] = m_uniqueIdGenerator; |
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525 | uid.m_uniqueIds[1] = m_uniqueIdGenerator; |
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526 | m_uniquePointers.insert(oldPtr,uid); |
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527 | return uid.m_ptr; |
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528 | |
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529 | } |
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530 | |
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531 | virtual const unsigned char* getBufferPointer() const |
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532 | { |
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533 | return m_buffer; |
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534 | } |
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535 | |
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536 | virtual int getCurrentBufferSize() const |
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537 | { |
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538 | return m_currentSize; |
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539 | } |
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540 | |
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541 | virtual void finalizeChunk(btChunk* chunk, const char* structType, int chunkCode,void* oldPtr) |
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542 | { |
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543 | if (!(m_serializationFlags&BT_SERIALIZE_NO_DUPLICATE_ASSERT)) |
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544 | { |
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545 | btAssert(!findPointer(oldPtr)); |
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546 | } |
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547 | |
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548 | chunk->m_dna_nr = getReverseType(structType); |
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549 | |
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550 | chunk->m_chunkCode = chunkCode; |
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551 | |
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552 | void* uniquePtr = getUniquePointer(oldPtr); |
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553 | |
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554 | m_chunkP.insert(oldPtr,uniquePtr);//chunk->m_oldPtr); |
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555 | chunk->m_oldPtr = uniquePtr;//oldPtr; |
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556 | |
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557 | } |
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558 | |
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559 | |
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560 | virtual unsigned char* internalAlloc(size_t size) |
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561 | { |
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562 | unsigned char* ptr = 0; |
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563 | |
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564 | if (m_totalSize) |
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565 | { |
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566 | ptr = m_buffer+m_currentSize; |
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567 | m_currentSize += int(size); |
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568 | btAssert(m_currentSize<m_totalSize); |
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569 | } else |
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570 | { |
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571 | ptr = (unsigned char*)btAlignedAlloc(size,16); |
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572 | m_currentSize += int(size); |
---|
573 | } |
---|
574 | return ptr; |
---|
575 | } |
---|
576 | |
---|
577 | |
---|
578 | |
---|
579 | virtual btChunk* allocate(size_t size, int numElements) |
---|
580 | { |
---|
581 | |
---|
582 | unsigned char* ptr = internalAlloc(int(size)*numElements+sizeof(btChunk)); |
---|
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 char*const * 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 | |
---|