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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT RUN-TIME COMPONENTS --
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4 -- --
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5 -- S Y S T E M . I M G _ L L B --
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6 -- --
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7 -- B o d y --
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8 -- --
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145
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9 -- Copyright (C) 1992-2019, Free Software Foundation, Inc. --
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111
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10 -- --
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11 -- GNAT is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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17 -- --
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18 -- As a special exception under Section 7 of GPL version 3, you are granted --
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19 -- additional permissions described in the GCC Runtime Library Exception, --
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20 -- version 3.1, as published by the Free Software Foundation. --
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21 -- --
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22 -- You should have received a copy of the GNU General Public License and --
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23 -- a copy of the GCC Runtime Library Exception along with this program; --
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24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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25 -- <http://www.gnu.org/licenses/>. --
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26 -- --
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27 -- GNAT was originally developed by the GNAT team at New York University. --
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28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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29 -- --
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30 ------------------------------------------------------------------------------
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31
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32 with System.Unsigned_Types; use System.Unsigned_Types;
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33
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34 package body System.Img_LLB is
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35
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36 ---------------------------------------
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37 -- Set_Image_Based_Long_Long_Integer --
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38 ---------------------------------------
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39
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40 procedure Set_Image_Based_Long_Long_Integer
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41 (V : Long_Long_Integer;
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42 B : Natural;
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43 W : Integer;
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44 S : out String;
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45 P : in out Natural)
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46 is
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47 Start : Natural;
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48
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49 begin
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50 -- Positive case can just use the unsigned circuit directly
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51
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52 if V >= 0 then
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53 Set_Image_Based_Long_Long_Unsigned
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54 (Long_Long_Unsigned (V), B, W, S, P);
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55
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56 -- Negative case has to set a minus sign. Note also that we have to be
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57 -- careful not to generate overflow with the largest negative number.
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58
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59 else
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60 P := P + 1;
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61 S (P) := ' ';
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62 Start := P;
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63
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64 declare
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65 pragma Suppress (Overflow_Check);
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66 pragma Suppress (Range_Check);
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67 begin
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68 Set_Image_Based_Long_Long_Unsigned
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69 (Long_Long_Unsigned (-V), B, W - 1, S, P);
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70 end;
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71
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72 -- Set minus sign in last leading blank location. Because of the
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73 -- code above, there must be at least one such location.
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74
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75 while S (Start + 1) = ' ' loop
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76 Start := Start + 1;
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77 end loop;
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78
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79 S (Start) := '-';
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80 end if;
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81
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82 end Set_Image_Based_Long_Long_Integer;
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83
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84 ----------------------------------------
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85 -- Set_Image_Based_Long_Long_Unsigned --
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86 ----------------------------------------
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87
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88 procedure Set_Image_Based_Long_Long_Unsigned
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89 (V : Long_Long_Unsigned;
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90 B : Natural;
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91 W : Integer;
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92 S : out String;
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93 P : in out Natural)
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94 is
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95 Start : constant Natural := P;
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96 F, T : Natural;
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97 BU : constant Long_Long_Unsigned := Long_Long_Unsigned (B);
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98 Hex : constant array
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99 (Long_Long_Unsigned range 0 .. 15) of Character :=
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100 "0123456789ABCDEF";
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101
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102 procedure Set_Digits (T : Long_Long_Unsigned);
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103 -- Set digits of absolute value of T
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104
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105 ----------------
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106 -- Set_Digits --
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107 ----------------
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108
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109 procedure Set_Digits (T : Long_Long_Unsigned) is
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110 begin
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111 if T >= BU then
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112 Set_Digits (T / BU);
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113 P := P + 1;
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114 S (P) := Hex (T mod BU);
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115 else
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116 P := P + 1;
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117 S (P) := Hex (T);
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118 end if;
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119 end Set_Digits;
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120
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121 -- Start of processing for Set_Image_Based_Long_Long_Unsigned
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122
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123 begin
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124
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125 if B >= 10 then
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126 P := P + 1;
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127 S (P) := '1';
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128 end if;
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129
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130 P := P + 1;
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131 S (P) := Character'Val (Character'Pos ('0') + B mod 10);
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132
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133 P := P + 1;
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134 S (P) := '#';
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135
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136 Set_Digits (V);
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137
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138 P := P + 1;
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139 S (P) := '#';
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140
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141 -- Add leading spaces if required by width parameter
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142
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143 if P - Start < W then
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144 F := P;
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145 P := Start + W;
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146 T := P;
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147
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148 while F > Start loop
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149 S (T) := S (F);
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150 T := T - 1;
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151 F := F - 1;
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152 end loop;
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153
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154 for J in Start + 1 .. T loop
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155 S (J) := ' ';
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156 end loop;
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157 end if;
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158
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159 end Set_Image_Based_Long_Long_Unsigned;
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160
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161 end System.Img_LLB;
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