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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 . D I M . F L O A T _ I O --
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6 -- --
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7 -- S p e c --
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8 -- --
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145
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9 -- Copyright (C) 2011-2019, 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 -- This package provides output routines for float dimensioned types. All Put
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33 -- routines are modeled after those in package Ada.Text_IO.Float_IO with the
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34 -- addition of an extra default parameter. All Put_Dim_Of routines
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35 -- output the dimension of Item in a symbolic manner.
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36
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37 -- Parameter Symbol may be used in the following manner (all the examples are
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38 -- based on the MKS system of units defined in package System.Dim.Mks):
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39
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40 -- type Mks_Type is new Long_Long_Float
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41 -- with
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42 -- Dimension_System => (
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43 -- (Unit_Name => Meter, Unit_Symbol => 'm', Dim_Symbol => 'L'),
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44 -- (Unit_Name => Kilogram, Unit_Symbol => "kg", Dim_Symbol => 'M'),
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45 -- (Unit_Name => Second, Unit_Symbol => 's', Dim_Symbol => 'T'),
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46 -- (Unit_Name => Ampere, Unit_Symbol => 'A', Dim_Symbol => 'I'),
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47 -- (Unit_Name => Kelvin, Unit_Symbol => 'K', Dim_Symbol => '@'),
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48 -- (Unit_Name => Mole, Unit_Symbol => "mol", Dim_Symbol => 'N'),
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49 -- (Unit_Name => Candela, Unit_Symbol => "cd", Dim_Symbol => 'J'));
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50
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51 -- Case 1. A value is supplied for Symbol
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52
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53 -- * Put : The string appears as a suffix of Item
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54
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55 -- * Put_Dim_Of : The string appears alone
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56
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57 -- Obj : Mks_Type := 2.6;
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58 -- Put (Obj, 1, 1, 0, " dimensionless");
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59 -- Put_Dim_Of (Obj, "dimensionless");
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60
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61 -- The corresponding outputs are:
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62 -- $2.6 dimensionless
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63 -- $dimensionless
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64
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65 -- Case 2. No value is supplied for Symbol and Item is dimensionless
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66
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67 -- * Put : Item appears without a suffix
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68
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69 -- * Put_Dim_Of : the output is []
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70
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71 -- Obj : Mks_Type := 2.6;
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72 -- Put (Obj, 1, 1, 0);
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73 -- Put_Dim_Of (Obj);
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74
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75 -- The corresponding outputs are:
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76 -- $2.6
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77 -- $[]
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78
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79 -- Case 3. No value is supplied for Symbol and Item has a dimension
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80
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81 -- * Put : If the type of Item is a dimensioned subtype whose
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82 -- symbol is not empty, then the symbol appears as a suffix.
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83 -- Otherwise, a new string is created and appears as a
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84 -- suffix of Item. This string results in the successive
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85 -- concatenations between each unit symbol raised by its
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86 -- corresponding dimension power from the dimensions of Item.
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87
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88 -- * Put_Dim_Of : The output is a new string resulting in the successive
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89 -- concatenations between each dimension symbol raised by its
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90 -- corresponding dimension power from the dimensions of Item.
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91
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92 -- subtype Length is Mks_Type
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93 -- with
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94 -- Dimension => ('m',
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95 -- Meter => 1,
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96 -- others => 0);
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97
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98 -- Obj : Length := 2.3 * dm;
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99 -- Put (Obj, 1, 2, 0);
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100 -- Put_Dim_Of (Obj);
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101
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102 -- The corresponding outputs are:
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103 -- $0.23 m
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104 -- $[L]
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105
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106 -- subtype Random is Mks_Type
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107 -- with
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108 -- Dimension => (
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109 -- Meter => 3,
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110 -- Candela => -1,
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111 -- others => 0);
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112
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113 -- Obj : Random := 5.0;
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114 -- Put (Obj);
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115 -- Put_Dim_Of (Obj);
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116
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117 -- The corresponding outputs are:
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118 -- $5.0 m**3.cd**(-1)
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119 -- $[l**3.J**(-1)]
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120
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121 -- Put (3.3 * km * dm * min, 5, 1, 0);
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122 -- Put_Dim_Of (3.3 * km * dm * min);
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123
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124 -- The corresponding outputs are:
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125 -- $19800.0 m**2.s
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126 -- $[L**2.T]
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127
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128 with Ada.Text_IO; use Ada.Text_IO;
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129
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130 generic
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131 type Num_Dim_Float is digits <>;
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132
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133 package System.Dim.Float_IO is
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134
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135 Default_Fore : Field := 2;
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136 Default_Aft : Field := Num_Dim_Float'Digits - 1;
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137 Default_Exp : Field := 3;
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138
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139 procedure Put
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140 (File : File_Type;
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141 Item : Num_Dim_Float;
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142 Fore : Field := Default_Fore;
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143 Aft : Field := Default_Aft;
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144 Exp : Field := Default_Exp;
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145 Symbol : String := "");
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146
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147 procedure Put
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148 (Item : Num_Dim_Float;
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149 Fore : Field := Default_Fore;
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150 Aft : Field := Default_Aft;
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151 Exp : Field := Default_Exp;
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152 Symbol : String := "");
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153
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154 procedure Put
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155 (To : out String;
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156 Item : Num_Dim_Float;
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157 Aft : Field := Default_Aft;
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158 Exp : Field := Default_Exp;
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159 Symbol : String := "");
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160
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161 procedure Put_Dim_Of
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162 (File : File_Type;
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163 Item : Num_Dim_Float;
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164 Symbol : String := "");
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165
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166 procedure Put_Dim_Of
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167 (Item : Num_Dim_Float;
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168 Symbol : String := "");
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169
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170 procedure Put_Dim_Of
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171 (To : out String;
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172 Item : Num_Dim_Float;
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173 Symbol : String := "");
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174
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175 pragma Inline (Put);
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176 pragma Inline (Put_Dim_Of);
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177
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178 function Image
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179 (Item : Num_Dim_Float;
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180 Aft : Field := Default_Aft;
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181 Exp : Field := Default_Exp;
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182 Symbol : String := "") return String;
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183
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184 end System.Dim.Float_IO;
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