1------------------------------------------------------------------------------ 2-- -- 3-- GNAT RUN-TIME COMPONENTS -- 4-- -- 5-- S Y S T E M . D I M . F L O A T _ I O -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 2011-2015, Free Software Foundation, Inc. -- 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- -- 13-- ware Foundation; either version 3, or (at your option) any later ver- -- 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 -- 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/>. -- 26-- -- 27-- GNAT was originally developed by the GNAT team at New York University. -- 28-- Extensive contributions were provided by Ada Core Technologies Inc. -- 29-- -- 30------------------------------------------------------------------------------ 31 32-- This package provides output routines for float dimensioned types. All Put 33-- routines are modelled after those in package Ada.Text_IO.Float_IO with the 34-- addition of an extra default parameter. All Put_Dim_Of routines 35-- output the dimension of Item in a symbolic manner. 36 37-- Parameter Symbol may be used in the following manner (all the examples are 38-- based on the MKS system of units defined in package System.Dim.Mks): 39 40-- type Mks_Type is new Long_Long_Float 41-- with 42-- Dimension_System => ( 43-- (Unit_Name => Meter, Unit_Symbol => 'm', Dim_Symbol => 'L'), 44-- (Unit_Name => Kilogram, Unit_Symbol => "kg", Dim_Symbol => 'M'), 45-- (Unit_Name => Second, Unit_Symbol => 's', Dim_Symbol => 'T'), 46-- (Unit_Name => Ampere, Unit_Symbol => 'A', Dim_Symbol => 'I'), 47-- (Unit_Name => Kelvin, Unit_Symbol => 'K', Dim_Symbol => '@'), 48-- (Unit_Name => Mole, Unit_Symbol => "mol", Dim_Symbol => 'N'), 49-- (Unit_Name => Candela, Unit_Symbol => "cd", Dim_Symbol => 'J')); 50 51-- Case 1. A value is supplied for Symbol 52 53-- * Put : The string appears as a suffix of Item 54 55-- * Put_Dim_Of : The string appears alone 56 57-- Obj : Mks_Type := 2.6; 58-- Put (Obj, 1, 1, 0, " dimensionless"); 59-- Put_Dim_Of (Obj, "dimensionless"); 60 61-- The corresponding outputs are: 62-- $2.6 dimensionless 63-- $dimensionless 64 65-- Case 2. No value is supplied for Symbol and Item is dimensionless 66 67-- * Put : Item appears without a suffix 68 69-- * Put_Dim_Of : the output is [] 70 71-- Obj : Mks_Type := 2.6; 72-- Put (Obj, 1, 1, 0); 73-- Put_Dim_Of (Obj); 74 75-- The corresponding outputs are: 76-- $2.6 77-- $[] 78 79-- Case 3. No value is supplied for Symbol and Item has a dimension 80 81-- * Put : If the type of Item is a dimensioned subtype whose 82-- symbol is not empty, then the symbol appears as a suffix. 83-- Otherwise, a new string is created and appears as a 84-- suffix of Item. This string results in the successive 85-- concatenations between each unit symbol raised by its 86-- corresponding dimension power from the dimensions of Item. 87 88-- * Put_Dim_Of : The output is a new string resulting in the successive 89-- concatenations between each dimension symbol raised by its 90-- corresponding dimension power from the dimensions of Item. 91 92-- subtype Length is Mks_Type 93-- with 94-- Dimension => ('m', 95-- Meter => 1, 96-- others => 0); 97 98-- Obj : Length := 2.3 * dm; 99-- Put (Obj, 1, 2, 0); 100-- Put_Dim_Of (Obj); 101 102-- The corresponding outputs are: 103-- $0.23 m 104-- $[L] 105 106-- subtype Random is Mks_Type 107-- with 108-- Dimension => ( 109-- Meter => 3, 110-- Candela => -1, 111-- others => 0); 112 113-- Obj : Random := 5.0; 114-- Put (Obj); 115-- Put_Dim_Of (Obj); 116 117-- The corresponding outputs are: 118-- $5.0 m**3.cd**(-1) 119-- $[l**3.J**(-1)] 120 121-- Put (3.3 * km * dm * min, 5, 1, 0); 122-- Put_Dim_Of (3.3 * km * dm * min); 123 124-- The corresponding outputs are: 125-- $19800.0 m**2.s 126-- $[L**2.T] 127 128with Ada.Text_IO; use Ada.Text_IO; 129 130generic 131 type Num_Dim_Float is digits <>; 132 133package System.Dim.Float_IO is 134 135 Default_Fore : Field := 2; 136 Default_Aft : Field := Num_Dim_Float'Digits - 1; 137 Default_Exp : Field := 3; 138 139 procedure Put 140 (File : File_Type; 141 Item : Num_Dim_Float; 142 Fore : Field := Default_Fore; 143 Aft : Field := Default_Aft; 144 Exp : Field := Default_Exp; 145 Symbol : String := ""); 146 147 procedure Put 148 (Item : Num_Dim_Float; 149 Fore : Field := Default_Fore; 150 Aft : Field := Default_Aft; 151 Exp : Field := Default_Exp; 152 Symbol : String := ""); 153 154 procedure Put 155 (To : out String; 156 Item : Num_Dim_Float; 157 Aft : Field := Default_Aft; 158 Exp : Field := Default_Exp; 159 Symbol : String := ""); 160 161 procedure Put_Dim_Of 162 (File : File_Type; 163 Item : Num_Dim_Float; 164 Symbol : String := ""); 165 166 procedure Put_Dim_Of 167 (Item : Num_Dim_Float; 168 Symbol : String := ""); 169 170 procedure Put_Dim_Of 171 (To : out String; 172 Item : Num_Dim_Float; 173 Symbol : String := ""); 174 175 pragma Inline (Put); 176 pragma Inline (Put_Dim_Of); 177 178 function Image 179 (Item : Num_Dim_Float; 180 Aft : Field := Default_Aft; 181 Exp : Field := Default_Exp; 182 Symbol : String := "") return String; 183 184end System.Dim.Float_IO; 185