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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 . I M G _ E N U M --
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6 -- --
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7 -- S p e c --
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8 -- --
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9 -- Copyright (C) 2000-2017, Free Software Foundation, Inc. --
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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 -- Enumeration_Type'Image for all enumeration types except those in package
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33 -- Standard (where we have no opportunity to build image tables), and in
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34 -- package System (where it is too early to start building image tables).
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35 -- Special routines exist for the enumeration types in these packages.
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36
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37 -- Note: this is an obsolete package, replaced by System.Img_Enum_New, which
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38 -- provides procedures instead of functions for these enumeration image calls.
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39 -- The reason we maintain this package is that when bootstrapping with old
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40 -- compilers, the old compiler will search for this unit, expecting to find
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41 -- these functions. The new compiler will search for procedures in the new
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42 -- version of the unit.
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43
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44 pragma Compiler_Unit_Warning;
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45
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46 package System.Img_Enum is
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47 pragma Pure;
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48
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49 function Image_Enumeration_8
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50 (Pos : Natural;
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51 Names : String;
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52 Indexes : System.Address) return String;
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53 -- Used to compute Enum'Image (Str) where Enum is some enumeration type
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54 -- other than those defined in package Standard. Names is a string with a
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55 -- lower bound of 1 containing the characters of all the enumeration
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56 -- literals concatenated together in sequence. Indexes is the address of an
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57 -- array of type array (0 .. N) of Natural_8, where N is the number of
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58 -- enumeration literals in the type. The Indexes values are the starting
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59 -- subscript of each enumeration literal, indexed by Pos values, with an
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60 -- extra entry at the end containing Names'Length + 1. The reason that
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61 -- Indexes is passed by address is that the actual type is created on the
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62 -- fly by the expander. The value returned is the desired 'Image value.
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63
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64 function Image_Enumeration_16
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65 (Pos : Natural;
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66 Names : String;
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67 Indexes : System.Address) return String;
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68 -- Identical to Image_Enumeration_8 except that it handles types
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69 -- using array (0 .. Num) of Natural_16 for the Indexes table.
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70
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71 function Image_Enumeration_32
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72 (Pos : Natural;
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73 Names : String;
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74 Indexes : System.Address) return String;
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75 -- Identical to Image_Enumeration_8 except that it handles types
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76 -- using array (0 .. Num) of Natural_32 for the Indexes table.
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77
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78 end System.Img_Enum;
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