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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 W --
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6 -- --
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7 -- B o d y --
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8 -- --
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131
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9 -- Copyright (C) 1992-2018, 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_LLW is
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35
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36 ---------------------------------------
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37 -- Set_Image_Width_Long_Long_Integer --
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38 ---------------------------------------
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39
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40 procedure Set_Image_Width_Long_Long_Integer
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41 (V : Long_Long_Integer;
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42 W : Integer;
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43 S : out String;
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44 P : in out Natural)
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45 is
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46 Start : Natural;
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47
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48 begin
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49 -- Positive case can just use the unsigned circuit directly
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50
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51 if V >= 0 then
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52 Set_Image_Width_Long_Long_Unsigned
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53 (Long_Long_Unsigned (V), W, S, P);
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54
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55 -- Negative case has to set a minus sign. Note also that we have to be
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56 -- careful not to generate overflow with the largest negative number.
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57
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58 else
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59 P := P + 1;
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60 S (P) := ' ';
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61 Start := P;
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62
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63 declare
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64 pragma Suppress (Overflow_Check);
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65 pragma Suppress (Range_Check);
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66 begin
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67 Set_Image_Width_Long_Long_Unsigned
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68 (Long_Long_Unsigned (-V), W - 1, S, P);
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69 end;
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70
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71 -- Set minus sign in last leading blank location. Because of the
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72 -- code above, there must be at least one such location.
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73
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74 while S (Start + 1) = ' ' loop
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75 Start := Start + 1;
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76 end loop;
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77
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78 S (Start) := '-';
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79 end if;
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80
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81 end Set_Image_Width_Long_Long_Integer;
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82
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83 ----------------------------------------
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84 -- Set_Image_Width_Long_Long_Unsigned --
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85 ----------------------------------------
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86
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87 procedure Set_Image_Width_Long_Long_Unsigned
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88 (V : Long_Long_Unsigned;
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89 W : Integer;
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90 S : out String;
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91 P : in out Natural)
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92 is
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93 Start : constant Natural := P;
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94 F, T : Natural;
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95
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96 procedure Set_Digits (T : Long_Long_Unsigned);
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97 -- Set digits of absolute value of T
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98
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99 ----------------
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100 -- Set_Digits --
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101 ----------------
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102
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103 procedure Set_Digits (T : Long_Long_Unsigned) is
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104 begin
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105 if T >= 10 then
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106 Set_Digits (T / 10);
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107 P := P + 1;
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108 S (P) := Character'Val (T mod 10 + Character'Pos ('0'));
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109 else
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110 P := P + 1;
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111 S (P) := Character'Val (T + Character'Pos ('0'));
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112 end if;
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113 end Set_Digits;
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114
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115 -- Start of processing for Set_Image_Width_Long_Long_Unsigned
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116
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117 begin
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118 Set_Digits (V);
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119
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120 -- Add leading spaces if required by width parameter
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121
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122 if P - Start < W then
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123 F := P;
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124 P := P + (W - (P - Start));
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125 T := P;
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126
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127 while F > Start loop
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128 S (T) := S (F);
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129 T := T - 1;
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130 F := F - 1;
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131 end loop;
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132
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133 for J in Start + 1 .. T loop
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134 S (J) := ' ';
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135 end loop;
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136 end if;
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137
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138 end Set_Image_Width_Long_Long_Unsigned;
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139
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140 end System.Img_LLW;
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