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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT COMPILER COMPONENTS --
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4 -- --
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5 -- S Y S T E M . V A L _ E N U M --
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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 Ada.Unchecked_Conversion;
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33
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34 with System.Val_Util; use System.Val_Util;
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35
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36 package body System.Val_Enum is
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37
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38 -------------------------
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39 -- Value_Enumeration_8 --
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40 -------------------------
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41
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42 function Value_Enumeration_8
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43 (Names : String;
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44 Indexes : System.Address;
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45 Num : Natural;
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46 Str : String)
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47 return Natural
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48 is
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49 F : Natural;
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50 L : Natural;
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51 S : String (Str'Range) := Str;
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52
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53 type Natural_8 is range 0 .. 2 ** 7 - 1;
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54 type Index_Table is array (Natural) of Natural_8;
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55 type Index_Table_Ptr is access Index_Table;
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56
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57 function To_Index_Table_Ptr is
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58 new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
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59
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60 IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
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61
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62 begin
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63 Normalize_String (S, F, L);
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64
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65 for J in 0 .. Num loop
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66 if Names
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67 (Natural (IndexesT (J)) ..
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68 Natural (IndexesT (J + 1)) - 1) = S (F .. L)
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69 then
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70 return J;
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71 end if;
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72 end loop;
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73
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74 Bad_Value (Str);
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75 end Value_Enumeration_8;
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76
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77 --------------------------
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78 -- Value_Enumeration_16 --
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79 --------------------------
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80
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81 function Value_Enumeration_16
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82 (Names : String;
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83 Indexes : System.Address;
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84 Num : Natural;
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85 Str : String)
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86 return Natural
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87 is
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88 F : Natural;
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89 L : Natural;
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90 S : String (Str'Range) := Str;
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91
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92 type Natural_16 is range 0 .. 2 ** 15 - 1;
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93 type Index_Table is array (Natural) of Natural_16;
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94 type Index_Table_Ptr is access Index_Table;
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95
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96 function To_Index_Table_Ptr is
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97 new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
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98
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99 IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
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100
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101 begin
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102 Normalize_String (S, F, L);
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103
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104 for J in 0 .. Num loop
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105 if Names
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106 (Natural (IndexesT (J)) ..
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107 Natural (IndexesT (J + 1)) - 1) = S (F .. L)
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108 then
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109 return J;
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110 end if;
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111 end loop;
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112
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113 Bad_Value (Str);
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114 end Value_Enumeration_16;
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115
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116 --------------------------
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117 -- Value_Enumeration_32 --
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118 --------------------------
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119
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120 function Value_Enumeration_32
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121 (Names : String;
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122 Indexes : System.Address;
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123 Num : Natural;
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124 Str : String)
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125 return Natural
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126 is
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127 F : Natural;
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128 L : Natural;
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129 S : String (Str'Range) := Str;
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130
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131 type Natural_32 is range 0 .. 2 ** 31 - 1;
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132 type Index_Table is array (Natural) of Natural_32;
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133 type Index_Table_Ptr is access Index_Table;
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134
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135 function To_Index_Table_Ptr is
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136 new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
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137
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138 IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
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139
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140 begin
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141 Normalize_String (S, F, L);
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142
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143 for J in 0 .. Num loop
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144 if Names
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145 (Natural (IndexesT (J)) ..
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146 Natural (IndexesT (J + 1)) - 1) = S (F .. L)
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147 then
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148 return J;
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149 end if;
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150 end loop;
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151
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152 Bad_Value (Str);
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153 end Value_Enumeration_32;
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154
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155 end System.Val_Enum;
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