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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT COMPILER COMPONENTS --
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4 -- --
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5 -- I N T E R F A C E S --
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6 -- --
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7 -- S p e c --
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8 -- --
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131
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9 -- Copyright (C) 2002-2018, Free Software Foundation, Inc. --
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111
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10 -- --
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11 -- This specification is derived from the Ada Reference Manual for use with --
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12 -- GNAT. The copyright notice above, and the license provisions that follow --
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13 -- apply solely to the implementation dependent sections of this file. --
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14 -- --
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15 -- GNAT is free software; you can redistribute it and/or modify it under --
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16 -- terms of the GNU General Public License as published by the Free Soft- --
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17 -- ware Foundation; either version 3, or (at your option) any later ver- --
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18 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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19 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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20 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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21 -- --
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22 -- As a special exception under Section 7 of GPL version 3, you are granted --
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23 -- additional permissions described in the GCC Runtime Library Exception, --
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24 -- version 3.1, as published by the Free Software Foundation. --
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25 -- --
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26 -- You should have received a copy of the GNU General Public License and --
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27 -- a copy of the GCC Runtime Library Exception along with this program; --
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28 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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29 -- <http://www.gnu.org/licenses/>. --
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30 -- --
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31 -- GNAT was originally developed by the GNAT team at New York University. --
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32 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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33 -- --
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34 ------------------------------------------------------------------------------
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35
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36 pragma Compiler_Unit_Warning;
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37
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38 package Interfaces is
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39 pragma No_Elaboration_Code_All;
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40 pragma Pure;
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41
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42 -- All identifiers in this unit are implementation defined
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43
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44 pragma Implementation_Defined;
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45
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46 type Integer_8 is range -2 ** 7 .. 2 ** 7 - 1;
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47 for Integer_8'Size use 8;
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48
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49 type Integer_16 is range -2 ** 15 .. 2 ** 15 - 1;
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50 for Integer_16'Size use 16;
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51
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52 type Integer_32 is range -2 ** 31 .. 2 ** 31 - 1;
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53 for Integer_32'Size use 32;
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54
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55 type Integer_64 is new Long_Long_Integer;
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56 for Integer_64'Size use 64;
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57 -- Note: we use Long_Long_Integer'First instead of -2 ** 63 to allow this
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58 -- unit to compile when using custom target configuration files where the
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59 -- maximum integer is 32 bits. This is useful for static analysis tools
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60 -- such as SPARK or CodePeer. In the normal case Long_Long_Integer is
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61 -- always 64-bits so we get the desired 64-bit type.
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62
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63 type Unsigned_8 is mod 2 ** 8;
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64 for Unsigned_8'Size use 8;
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65
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66 type Unsigned_16 is mod 2 ** 16;
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67 for Unsigned_16'Size use 16;
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68
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69 type Unsigned_24 is mod 2 ** 24;
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70 for Unsigned_24'Size use 24;
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71 -- Declare this type for compatibility with legacy Ada compilers.
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72 -- This is particularly useful in the context of CodePeer analysis.
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73
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74 type Unsigned_32 is mod 2 ** 32;
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75 for Unsigned_32'Size use 32;
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76
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77 type Unsigned_64 is mod 2 ** Long_Long_Integer'Size;
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78 for Unsigned_64'Size use 64;
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79 -- See comment on Integer_64 above
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80
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81 function Shift_Left
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82 (Value : Unsigned_8;
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83 Amount : Natural) return Unsigned_8;
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84
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85 function Shift_Right
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86 (Value : Unsigned_8;
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87 Amount : Natural) return Unsigned_8;
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88
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89 function Shift_Right_Arithmetic
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90 (Value : Unsigned_8;
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91 Amount : Natural) return Unsigned_8;
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92
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93 function Rotate_Left
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94 (Value : Unsigned_8;
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95 Amount : Natural) return Unsigned_8;
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96
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97 function Rotate_Right
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98 (Value : Unsigned_8;
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99 Amount : Natural) return Unsigned_8;
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100
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101 function Shift_Left
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102 (Value : Unsigned_16;
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103 Amount : Natural) return Unsigned_16;
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104
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105 function Shift_Right
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106 (Value : Unsigned_16;
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107 Amount : Natural) return Unsigned_16;
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108
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109 function Shift_Right_Arithmetic
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110 (Value : Unsigned_16;
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111 Amount : Natural) return Unsigned_16;
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112
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113 function Rotate_Left
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114 (Value : Unsigned_16;
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115 Amount : Natural) return Unsigned_16;
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116
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117 function Rotate_Right
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118 (Value : Unsigned_16;
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119 Amount : Natural) return Unsigned_16;
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120
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121 function Shift_Left
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122 (Value : Unsigned_32;
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123 Amount : Natural) return Unsigned_32;
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124
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125 function Shift_Right
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126 (Value : Unsigned_32;
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127 Amount : Natural) return Unsigned_32;
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128
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129 function Shift_Right_Arithmetic
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130 (Value : Unsigned_32;
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131 Amount : Natural) return Unsigned_32;
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132
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133 function Rotate_Left
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134 (Value : Unsigned_32;
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135 Amount : Natural) return Unsigned_32;
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136
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137 function Rotate_Right
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138 (Value : Unsigned_32;
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139 Amount : Natural) return Unsigned_32;
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140
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141 function Shift_Left
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142 (Value : Unsigned_64;
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143 Amount : Natural) return Unsigned_64;
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144
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145 function Shift_Right
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146 (Value : Unsigned_64;
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147 Amount : Natural) return Unsigned_64;
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148
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149 function Shift_Right_Arithmetic
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150 (Value : Unsigned_64;
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151 Amount : Natural) return Unsigned_64;
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152
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153 function Rotate_Left
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154 (Value : Unsigned_64;
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155 Amount : Natural) return Unsigned_64;
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156
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157 function Rotate_Right
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158 (Value : Unsigned_64;
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159 Amount : Natural) return Unsigned_64;
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160
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161 pragma Import (Intrinsic, Shift_Left);
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162 pragma Import (Intrinsic, Shift_Right);
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163 pragma Import (Intrinsic, Shift_Right_Arithmetic);
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164 pragma Import (Intrinsic, Rotate_Left);
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165 pragma Import (Intrinsic, Rotate_Right);
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166
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167 -- IEEE Floating point types
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168
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169 type IEEE_Float_32 is digits 6;
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170 for IEEE_Float_32'Size use 32;
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171
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172 type IEEE_Float_64 is digits 15;
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173 for IEEE_Float_64'Size use 64;
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174
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175 -- If there is an IEEE extended float available on the machine, we assume
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176 -- that it is available as Long_Long_Float.
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177
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178 -- Note: it is harmless, and explicitly permitted, to include additional
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179 -- types in interfaces, so it is not wrong to have IEEE_Extended_Float
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180 -- defined even if the extended format is not available.
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181
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182 type IEEE_Extended_Float is new Long_Long_Float;
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183
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184 end Interfaces;
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