projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| cacbc350 RK |
1 | ------------------------------------------------------------------------------ |
| 2 | -- -- | |
| 3084fecd | 3 | -- GNAT RUN-TIME COMPONENTS -- |
| cacbc350 RK |
4 | -- -- |
| 5 | -- S Y S T E M . W I D _ E N U M -- | |
| 6 | -- -- | |
| 7 | -- B o d y -- | |
| 8 | -- -- | |
| 4b490c1e | 9 | -- Copyright (C) 1992-2020, 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 | ||
| cecaf88a | 32 | with Ada.Unchecked_Conversion; |
| cacbc350 RK |
33 | |
| 34 | package body System.Wid_Enum is | |
| 35 | ||
| 36 | ------------------------- | |
| 37 | -- Width_Enumeration_8 -- | |
| 38 | ------------------------- | |
| 39 | ||
| 40 | function Width_Enumeration_8 | |
| 41 | (Names : String; | |
| 42 | Indexes : System.Address; | |
| 43 | Lo, Hi : Natural) | |
| 44 | return Natural | |
| 45 | is | |
| 07fc65c4 GB |
46 | pragma Warnings (Off, Names); |
| 47 | ||
| cacbc350 RK |
48 | W : Natural; |
| 49 | ||
| 50 | type Natural_8 is range 0 .. 2 ** 7 - 1; | |
| 51 | type Index_Table is array (Natural) of Natural_8; | |
| 52 | type Index_Table_Ptr is access Index_Table; | |
| 53 | ||
| 54 | function To_Index_Table_Ptr is | |
| cecaf88a | 55 | new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr); |
| cacbc350 RK |
56 | |
| 57 | IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes); | |
| 58 | ||
| 59 | begin | |
| 60 | W := 0; | |
| 61 | ||
| 62 | for J in Lo .. Hi loop | |
| 63 | W := Natural'Max (W, Natural (IndexesT (J + 1) - IndexesT (J))); | |
| 64 | end loop; | |
| 65 | ||
| 66 | return W; | |
| 67 | end Width_Enumeration_8; | |
| 68 | ||
| 69 | -------------------------- | |
| 70 | -- Width_Enumeration_16 -- | |
| 71 | -------------------------- | |
| 72 | ||
| 73 | function Width_Enumeration_16 | |
| 74 | (Names : String; | |
| 75 | Indexes : System.Address; | |
| 76 | Lo, Hi : Natural) | |
| 77 | return Natural | |
| 78 | is | |
| 07fc65c4 GB |
79 | pragma Warnings (Off, Names); |
| 80 | ||
| cacbc350 RK |
81 | W : Natural; |
| 82 | ||
| 83 | type Natural_16 is range 0 .. 2 ** 15 - 1; | |
| 84 | type Index_Table is array (Natural) of Natural_16; | |
| 85 | type Index_Table_Ptr is access Index_Table; | |
| 86 | ||
| 87 | function To_Index_Table_Ptr is | |
| cecaf88a | 88 | new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr); |
| cacbc350 RK |
89 | |
| 90 | IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes); | |
| 91 | ||
| 92 | begin | |
| 93 | W := 0; | |
| 94 | ||
| 95 | for J in Lo .. Hi loop | |
| 96 | W := Natural'Max (W, Natural (IndexesT (J + 1) - IndexesT (J))); | |
| 97 | end loop; | |
| 98 | ||
| 99 | return W; | |
| 100 | end Width_Enumeration_16; | |
| 101 | ||
| 102 | -------------------------- | |
| 103 | -- Width_Enumeration_32 -- | |
| 104 | -------------------------- | |
| 105 | ||
| 106 | function Width_Enumeration_32 | |
| 107 | (Names : String; | |
| 108 | Indexes : System.Address; | |
| 109 | Lo, Hi : Natural) | |
| 110 | return Natural | |
| 111 | is | |
| 07fc65c4 GB |
112 | pragma Warnings (Off, Names); |
| 113 | ||
| cacbc350 RK |
114 | W : Natural; |
| 115 | ||
| 116 | type Natural_32 is range 0 .. 2 ** 31 - 1; | |
| 117 | type Index_Table is array (Natural) of Natural_32; | |
| 118 | type Index_Table_Ptr is access Index_Table; | |
| 119 | ||
| 120 | function To_Index_Table_Ptr is | |
| cecaf88a | 121 | new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr); |
| cacbc350 RK |
122 | |
| 123 | IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes); | |
| 124 | ||
| 125 | begin | |
| 126 | W := 0; | |
| 127 | ||
| 128 | for J in Lo .. Hi loop | |
| 129 | W := Natural'Max (W, Natural (IndexesT (J + 1) - IndexesT (J))); | |
| 130 | end loop; | |
| 131 | ||
| 132 | return W; | |
| 133 | end Width_Enumeration_32; | |
| 134 | ||
| 135 | end System.Wid_Enum; |