1 | // Copyright (C) 2012 Kornel Kisielewicz
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2 | // This file is part of NV Libraries.
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3 | // For conditions of distribution and use, see copyright notice in nv.hh
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4 |
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5 | #ifndef NV_TYPES_HH
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6 | #define NV_TYPES_HH
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7 |
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8 | #include <glm/glm.hpp>
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9 | #include <nv/common.hh>
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10 | #include <nv/object.hh>
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11 | #include <type_traits>
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12 | #include <utility>
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13 | #include <unordered_map>
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14 | #include <vector>
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15 | #include <string>
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16 |
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17 | #define NV_REGISTER_NAME( s ) template <> inline const char* nv::get_type_name<s> () { return #s; }
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18 |
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19 | namespace nv
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20 | {
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21 |
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22 | enum etype
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23 | {
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24 | INT,
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25 | BYTE,
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26 | SHORT,
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27 | UINT,
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28 | UBYTE,
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29 | USHORT,
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30 | FLOAT,
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31 | FLOAT_VECTOR_2,
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32 | FLOAT_VECTOR_3,
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33 | FLOAT_VECTOR_4,
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34 | FLOAT_MATRIX_2,
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35 | FLOAT_MATRIX_3,
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36 | FLOAT_MATRIX_4,
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37 | INT_VECTOR_2,
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38 | INT_VECTOR_3,
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39 | INT_VECTOR_4
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40 | };
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41 |
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42 | typedef glm::vec2 vec2;
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43 | typedef glm::vec3 vec3;
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44 | typedef glm::vec4 vec4;
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45 |
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46 | typedef glm::ivec2 ivec2;
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47 | typedef glm::ivec3 ivec3;
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48 | typedef glm::ivec4 ivec4;
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49 |
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50 | typedef glm::mat2 mat2;
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51 | typedef glm::mat3 mat3;
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52 | typedef glm::mat4 mat4;
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53 |
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54 | template < etype EnumType > struct enum_to_type {};
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55 |
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56 | template <> struct enum_to_type< INT > { typedef int type; };
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57 | template <> struct enum_to_type< UINT > { typedef unsigned int type; };
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58 | template <> struct enum_to_type< SHORT > { typedef short type; };
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59 | template <> struct enum_to_type< USHORT >{ typedef unsigned short type; };
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60 | template <> struct enum_to_type< BYTE > { typedef char type; };
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61 | template <> struct enum_to_type< UBYTE > { typedef unsigned char type; };
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62 | template <> struct enum_to_type< FLOAT > { typedef f32 type; };
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63 |
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64 | template <> struct enum_to_type< FLOAT_VECTOR_2 > { typedef vec2 type; };
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65 | template <> struct enum_to_type< FLOAT_VECTOR_3 > { typedef vec3 type; };
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66 | template <> struct enum_to_type< FLOAT_VECTOR_4 > { typedef vec4 type; };
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67 |
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68 | template <> struct enum_to_type< INT_VECTOR_2 > { typedef ivec2 type; };
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69 | template <> struct enum_to_type< INT_VECTOR_3 > { typedef ivec3 type; };
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70 | template <> struct enum_to_type< INT_VECTOR_4 > { typedef ivec4 type; };
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71 |
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72 | template <> struct enum_to_type< FLOAT_MATRIX_2 > { typedef mat2 type; };
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73 | template <> struct enum_to_type< FLOAT_MATRIX_3 > { typedef mat3 type; };
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74 | template <> struct enum_to_type< FLOAT_MATRIX_4 > { typedef mat4 type; };
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75 |
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76 | template < typename TYPE > struct type_to_enum {};
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77 |
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78 | template <> struct type_to_enum< int > { static const etype type = INT; };
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79 | template <> struct type_to_enum< unsigned int > { static const etype type = UINT; };
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80 | template <> struct type_to_enum< short > { static const etype type = SHORT; };
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81 | template <> struct type_to_enum< unsigned short >{ static const etype type = USHORT; };
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82 | template <> struct type_to_enum< char > { static const etype type = BYTE; };
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83 | template <> struct type_to_enum< unsigned char > { static const etype type = UBYTE; };
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84 | template <> struct type_to_enum< f32 > { static const etype type = FLOAT; };
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85 |
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86 | template <> struct type_to_enum< vec2 > { static const etype type = FLOAT_VECTOR_2; };
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87 | template <> struct type_to_enum< vec3 > { static const etype type = FLOAT_VECTOR_3; };
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88 | template <> struct type_to_enum< vec4 > { static const etype type = FLOAT_VECTOR_4; };
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89 |
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90 | template <> struct type_to_enum< ivec2 > { static const etype type = INT_VECTOR_2; };
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91 | template <> struct type_to_enum< ivec3 > { static const etype type = INT_VECTOR_3; };
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92 | template <> struct type_to_enum< ivec4 > { static const etype type = INT_VECTOR_4; };
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93 |
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94 | template <> struct type_to_enum< mat2 > { static const etype type = FLOAT_MATRIX_2; };
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95 | template <> struct type_to_enum< mat3 > { static const etype type = FLOAT_MATRIX_3; };
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96 | template <> struct type_to_enum< mat4 > { static const etype type = FLOAT_MATRIX_4; };
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97 |
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98 | template <typename TYPE>
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99 | inline const char* get_type_name()
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100 | {
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101 | static_assert(sizeof(TYPE) == 0, "Type not implemented!");
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102 | return NULL;
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103 | }
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104 |
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105 | template <> inline const char* get_type_name<int> () { return "sint"; }
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106 | template <> inline const char* get_type_name<sint8> () { return "sint8"; }
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107 | template <> inline const char* get_type_name<sint16>() { return "sint16"; }
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108 | template <> inline const char* get_type_name<sint32>() { return "sint32"; }
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109 | template <> inline const char* get_type_name<sint64>() { return "sint64"; }
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110 |
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111 | template <> inline const char* get_type_name<unsigned int>() { return "uint"; }
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112 | template <> inline const char* get_type_name<uint8> () { return "uint8"; }
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113 | template <> inline const char* get_type_name<uint16>() { return "uint16"; }
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114 | template <> inline const char* get_type_name<uint32>() { return "uint32"; }
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115 | template <> inline const char* get_type_name<uint64>() { return "uint64"; }
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116 |
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117 | template <> inline const char* get_type_name<f32> () { return "f32"; }
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118 | template <> inline const char* get_type_name<f64> () { return "f64"; }
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119 |
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120 | template <> inline const char* get_type_name< vec2 > () { return "vec2"; }
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121 | template <> inline const char* get_type_name< vec3 > () { return "vec3"; }
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122 | template <> inline const char* get_type_name< vec4 > () { return "vec4"; }
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123 |
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124 | template <> inline const char* get_type_name< ivec2 > () { return "ivec2"; }
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125 | template <> inline const char* get_type_name< ivec3 > () { return "ivec3"; }
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126 | template <> inline const char* get_type_name< ivec4 > () { return "ivec4"; }
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127 |
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128 | template <> inline const char* get_type_name< mat2 > () { return "mat2"; }
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129 | template <> inline const char* get_type_name< mat3 > () { return "mat3"; }
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130 | template <> inline const char* get_type_name< mat4 > () { return "mat4"; }
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131 |
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132 | template <> inline const char* get_type_name<bool> () { return "bool"; }
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133 |
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134 | template <> inline const char* get_type_name<std::string> () { return "string"; }
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135 | template <> inline const char* get_type_name<object> () { return "object"; }
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136 |
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137 | template<typename T>
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138 | struct is_container
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139 | {
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140 | private:
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141 | typedef char yes;
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142 | typedef struct { char array[2]; } no;
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143 | template<typename C> static yes test(typename C::iterator*);
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144 | template<typename C> static no test(...);
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145 | public:
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146 | static const bool value = sizeof(test<T>(0)) == sizeof(yes);
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147 | };
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148 |
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149 | template<>
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150 | struct is_container< std::string > {
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151 | static const bool value = false;
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152 | };
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153 |
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154 |
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155 | template <typename TYPE>
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156 | std::size_t get_type_id()
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157 | {
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158 | static std::size_t type_id = std::hash<std::string>()(std::string(get_type_name<TYPE>()));
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159 | return type_id;
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160 | };
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161 |
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162 | struct hash_string
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163 | {
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164 | std::size_t hash;
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165 | const char* text;
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166 | hash_string() {}
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167 | hash_string( const char* a_text ) :
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168 | text( a_text )
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169 | {
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170 | hash = std::hash<std::string>()( std::string( a_text ) );
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171 | }
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172 | inline bool operator == (const hash_string& hs ) const
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173 | {
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174 | return hs.hash == hash;
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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 |
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180 | namespace std {
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181 | template<>
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182 | struct hash<nv::hash_string> {
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183 | size_t operator()(const nv::hash_string &hs) const
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184 | {
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185 | return hs.hash;
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186 | }
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187 | };
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188 | }
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189 |
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190 | namespace nv
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191 | {
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192 | struct type_entry;
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193 |
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194 | enum type_flag
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195 | {
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196 | TF_POINTER = 0x01, //< field is a pointer
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197 | TF_NOSERIALIZE = 0x02, //< ignore during serialization
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198 | TF_INVISIBLE = 0x04, //< field invisible to API
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199 | TF_READONLY = 0x08, //< read only field
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200 | TF_SIMPLETYPE = 0x10, //< raw binary I/O possible
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201 | TF_OWNED = 0x20,
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202 | TF_CONTAINER = 0x40, //< is a container
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203 | };
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204 |
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205 | struct type_field
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206 | {
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207 | hash_string name; //< name of the field
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208 | hash_string type_name; //< name of the type of the field
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209 | type_entry* type; //< pointer to field type
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210 | unsigned int flags; //< flags
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211 | size_t offset;
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212 |
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213 | template< typename TOBJECT, typename TFIELD >
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214 | type_field( hash_string name, TFIELD TOBJECT::*field, typename std::enable_if< is_container<TFIELD>::value, void* >::type = nullptr )
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215 | : name(name)
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216 | , type_name( get_type_name< std::remove_pointer<typename TFIELD::value_type>::type >() )
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217 | , type( nullptr )
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218 | , flags( 0 )
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219 | , offset( offsetof( TOBJECT, *field ) )
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220 | // NOTE: if offsetof behaves badly, check offset_of in common.hh
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221 | {
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222 | flags = TF_CONTAINER |
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223 | ( std::is_pointer<TFIELD::value_type>::value ? TF_POINTER : 0 ) |
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224 | ( std::is_pod<TFIELD::value_type>::value ? TF_SIMPLETYPE : 0 );
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225 | }
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226 |
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227 | template< typename TOBJECT, typename TFIELD >
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228 | type_field( hash_string name, TFIELD TOBJECT::*field, typename std::enable_if< !is_container<TFIELD>::value, void* >::type = nullptr )
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229 | : name(name)
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230 | , type_name( get_type_name< std::remove_pointer<TFIELD>::type >() )
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231 | , type( nullptr )
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232 | , flags( 0 )
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233 | , offset( offsetof( TOBJECT, *field ) )
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234 | // NOTE: if offsetof behaves badly, check offset_of in common.hh
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235 | {
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236 | flags =
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237 | ( std::is_pointer<TFIELD>::value ? TF_POINTER : 0 ) |
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238 | ( std::is_pod<TFIELD>::value ? TF_SIMPLETYPE : 0 );
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239 | }
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240 |
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241 | type_field& flag( unsigned int f )
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242 | {
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243 | flags |= f;
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244 | return *this;
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245 | }
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246 | };
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247 |
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248 | struct type_enum
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249 | {
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250 | hash_string name;
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251 | int value;
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252 | type_enum( hash_string name, int value ) : name(name), value(value) {}
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253 | };
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254 |
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255 | struct type_entry
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256 | {
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257 | // Function types for the constructor and destructor of registered types
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258 | typedef void (*constructor_func)(void*);
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259 | typedef void (*destructor_func)(void*);
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260 |
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261 | // Parent type database
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262 | class type_database* type_db;
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263 |
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264 | // Scoped C++ name of the type
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265 | hash_string name;
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266 |
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267 | // Pointers to the constructor and destructor functions
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268 | constructor_func constructor;
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269 | destructor_func destructor;
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270 |
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271 | // Result of sizeof(type) operation
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272 | size_t size;
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273 |
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274 | // Base type
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275 | type_entry* base_type;
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276 |
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277 | // Field list
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278 | std::vector<type_field> field_list;
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279 |
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280 | // Enum list
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281 | std::vector<type_enum> enum_list;
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282 |
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283 | template <int TYPE>
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284 | type_entry& base()
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285 | {
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286 | base_type = type_db->get_type( get_type_name<TYPE>() )
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287 | }
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288 |
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289 | template <int SIZE>
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290 | type_entry& fields( type_field (&init_fields)[SIZE] )
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291 | {
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292 | for (int i = 0; i < SIZE; i++)
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293 | {
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294 | type_field f = init_fields[i];
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295 | f.type = type_db->get_type(f.type_name);
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296 | field_list.push_back(f);
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297 | }
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298 | return *this;
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299 | }
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300 |
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301 | template <int SIZE>
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302 | type_entry& enums( type_enum (&init_enums)[SIZE] )
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303 | {
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304 | for (int i = 0; i < SIZE; i++)
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305 | {
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306 | enum_list.push_back( init_enums[i] )
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307 | }
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308 | return *this;
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309 | }
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310 | };
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311 |
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312 | class type_database
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313 | {
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314 | public:
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315 | template< typename TYPE >
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316 | type_entry& create_type()
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317 | {
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318 | hash_string name( get_type_name<TYPE>() );
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319 | type_entry* i_type = nullptr;
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320 | type_map::iterator it = m_types.find( name );
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321 | if ( it != m_types.end() )
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322 | {
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323 | return *(it->second);
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324 | }
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325 | i_type = new type_entry;
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326 | i_type->type_db = this;
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327 | i_type->name = name;
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328 | i_type->size = sizeof(TYPE);
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329 |
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330 | i_type->constructor = ConstructObject<TYPE>;
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331 | i_type->destructor = DestructObject<TYPE>;
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332 |
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333 | m_types[name] = i_type;
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334 | return *i_type;
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335 | }
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336 |
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337 | type_entry* get_type( hash_string name )
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338 | {
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339 | type_map::iterator it = m_types.find( name );
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340 | if ( it != m_types.end() )
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341 | {
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342 | return it->second;
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343 | }
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344 | return nullptr;
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345 | }
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346 | private:
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347 | typedef std::unordered_map<hash_string, type_entry*> type_map;
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348 | type_map m_types;
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349 | };
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350 |
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351 | template <typename TYPE> void ConstructObject(void* object)
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352 | {
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353 | // Use placement new to call the constructor
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354 | new (object) TYPE;
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355 | }
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356 | template <typename TYPE> void DestructObject(void* object)
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357 | {
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358 | // Explicit call of the destructor
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359 | ((TYPE*)object)->TYPE::~TYPE();
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360 | }
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361 |
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362 | }
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363 |
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364 | #endif
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365 |
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