projects / thirdparty / gcc.git / blame
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| cacbc350 RK |
1 | ------------------------------------------------------------------------------ |
| 2 | -- -- | |
| 3084fecd | 3 | -- GNAT RUN-TIME COMPONENTS -- |
| cacbc350 RK |
4 | -- -- |
| 5 | -- S Y S T E M . I M G _ L L B -- | |
| 6 | -- -- | |
| 7 | -- B o d y -- | |
| 8 | -- -- | |
| 748086b7 | 9 | -- Copyright (C) 1992-2009 Free Software Foundation, Inc. -- |
| cacbc350 RK |
10 | -- -- |
| 11 | -- GNAT is free software; you can redistribute it and/or modify it under -- | |
| 12 | -- terms of the GNU General Public License as published by the Free Soft- -- | |
| 748086b7 | 13 | -- ware Foundation; either version 3, or (at your option) any later ver- -- |
| cacbc350 RK |
14 | -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- |
| 15 | -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- | |
| 748086b7 JJ |
16 | -- or FITNESS FOR A PARTICULAR PURPOSE. -- |
| 17 | -- -- | |
| 18 | -- As a special exception under Section 7 of GPL version 3, you are granted -- | |
| 19 | -- additional permissions described in the GCC Runtime Library Exception, -- | |
| 20 | -- version 3.1, as published by the Free Software Foundation. -- | |
| 21 | -- -- | |
| 22 | -- You should have received a copy of the GNU General Public License and -- | |
| 23 | -- a copy of the GCC Runtime Library Exception along with this program; -- | |
| 24 | -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- | |
| 25 | -- <http://www.gnu.org/licenses/>. -- | |
| cacbc350 RK |
26 | -- -- |
| 27 | -- GNAT was originally developed by the GNAT team at New York University. -- | |
| 71ff80dc | 28 | -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
| cacbc350 RK |
29 | -- -- |
| 30 | ------------------------------------------------------------------------------ | |
| 31 | ||
| 32 | with System.Unsigned_Types; use System.Unsigned_Types; | |
| 33 | ||
| 34 | package body System.Img_LLB is | |
| 35 | ||
| 36 | --------------------------------------- | |
| 37 | -- Set_Image_Based_Long_Long_Integer -- | |
| 38 | --------------------------------------- | |
| 39 | ||
| 40 | procedure Set_Image_Based_Long_Long_Integer | |
| 41 | (V : Long_Long_Integer; | |
| 42 | B : Natural; | |
| 43 | W : Integer; | |
| 44 | S : out String; | |
| 45 | P : in out Natural) | |
| 46 | is | |
| 47 | Start : Natural; | |
| 48 | ||
| 49 | begin | |
| 50 | -- Positive case can just use the unsigned circuit directly | |
| 51 | ||
| 52 | if V >= 0 then | |
| 53 | Set_Image_Based_Long_Long_Unsigned | |
| 54 | (Long_Long_Unsigned (V), B, W, S, P); | |
| 55 | ||
| 56 | -- Negative case has to set a minus sign. Note also that we have to be | |
| 57 | -- careful not to generate overflow with the largest negative number. | |
| 58 | ||
| 59 | else | |
| 60 | P := P + 1; | |
| 61 | S (P) := ' '; | |
| 62 | Start := P; | |
| 63 | ||
| 64 | declare | |
| 65 | pragma Suppress (Overflow_Check); | |
| 66 | pragma Suppress (Range_Check); | |
| 67 | begin | |
| 68 | Set_Image_Based_Long_Long_Unsigned | |
| 69 | (Long_Long_Unsigned (-V), B, W - 1, S, P); | |
| 70 | end; | |
| 71 | ||
| 72 | -- Set minus sign in last leading blank location. Because of the | |
| 73 | -- code above, there must be at least one such location. | |
| 74 | ||
| 75 | while S (Start + 1) = ' ' loop | |
| 76 | Start := Start + 1; | |
| 77 | end loop; | |
| 78 | ||
| 79 | S (Start) := '-'; | |
| 80 | end if; | |
| 81 | ||
| 82 | end Set_Image_Based_Long_Long_Integer; | |
| 83 | ||
| 84 | ---------------------------------------- | |
| 85 | -- Set_Image_Based_Long_Long_Unsigned -- | |
| 86 | ---------------------------------------- | |
| 87 | ||
| 88 | procedure Set_Image_Based_Long_Long_Unsigned | |
| 89 | (V : Long_Long_Unsigned; | |
| 90 | B : Natural; | |
| 91 | W : Integer; | |
| 92 | S : out String; | |
| 93 | P : in out Natural) | |
| 94 | is | |
| 95 | Start : constant Natural := P; | |
| 96 | F, T : Natural; | |
| 97 | BU : constant Long_Long_Unsigned := Long_Long_Unsigned (B); | |
| 98 | Hex : constant array | |
| 99 | (Long_Long_Unsigned range 0 .. 15) of Character := | |
| 100 | "0123456789ABCDEF"; | |
| 101 | ||
| 102 | procedure Set_Digits (T : Long_Long_Unsigned); | |
| 103 | -- Set digits of absolute value of T | |
| 104 | ||
| 105 | procedure Set_Digits (T : Long_Long_Unsigned) is | |
| 106 | begin | |
| 107 | if T >= BU then | |
| 108 | Set_Digits (T / BU); | |
| 109 | P := P + 1; | |
| 110 | S (P) := Hex (T mod BU); | |
| 111 | else | |
| 112 | P := P + 1; | |
| 113 | S (P) := Hex (T); | |
| 114 | end if; | |
| 115 | end Set_Digits; | |
| 116 | ||
| 117 | -- Start of processing for Set_Image_Based_Long_Long_Unsigned | |
| 118 | ||
| 119 | begin | |
| 120 | ||
| 121 | if B >= 10 then | |
| 122 | P := P + 1; | |
| 123 | S (P) := '1'; | |
| 124 | end if; | |
| 125 | ||
| 126 | P := P + 1; | |
| 127 | S (P) := Character'Val (Character'Pos ('0') + B mod 10); | |
| 128 | ||
| 129 | P := P + 1; | |
| 130 | S (P) := '#'; | |
| 131 | ||
| 132 | Set_Digits (V); | |
| 133 | ||
| 134 | P := P + 1; | |
| 135 | S (P) := '#'; | |
| 136 | ||
| 137 | -- Add leading spaces if required by width parameter | |
| 138 | ||
| 139 | if P - Start < W then | |
| 140 | F := P; | |
| 141 | P := Start + W; | |
| 142 | T := P; | |
| 143 | ||
| 144 | while F > Start loop | |
| 145 | S (T) := S (F); | |
| 146 | T := T - 1; | |
| 147 | F := F - 1; | |
| 148 | end loop; | |
| 149 | ||
| 150 | for J in Start + 1 .. T loop | |
| 151 | S (J) := ' '; | |
| 152 | end loop; | |
| 153 | end if; | |
| 154 | ||
| 155 | end Set_Image_Based_Long_Long_Unsigned; | |
| 156 | ||
| 157 | end System.Img_LLB; |