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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 . W W D _ 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) 1992-2017, 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 -- This package contains routines used for Enumeration_Type'Wide_[Wide_]Width
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33
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34 with System.WCh_Con;
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35
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36 package System.WWd_Enum is
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37 pragma Pure;
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38
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39 function Wide_Width_Enumeration_8
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40 (Names : String;
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41 Indexes : System.Address;
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42 Lo, Hi : Natural;
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43 EM : System.WCh_Con.WC_Encoding_Method) return Natural;
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44 -- Used to compute Enum'Wide_Width where Enum is an enumeration subtype
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45 -- other than those defined in package Standard. Names is a string with
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46 -- a lower bound of 1 containing the characters of all the enumeration
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47 -- literals concatenated together in sequence. Indexes is the address
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48 -- of an array of type array (0 .. N) of Natural_8, where N is the
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49 -- number of enumeration literals in the type. The Indexes values are
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50 -- the starting subscript of each enumeration literal, indexed by Pos
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51 -- values, with an extra entry at the end containing Names'Length + 1.
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52 -- The reason that Indexes is passed by address is that the actual type
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53 -- is created on the fly by the expander.
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54 --
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55 -- Lo and Hi are the Pos values of the lower and upper bounds of the
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56 -- subtype. The result is the value of Width, i.e. the maximum value
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57 -- of the length of any enumeration literal in the given range. The
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58 -- fifth parameter, EM, is the wide character encoding method used in
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59 -- the Names table.
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60
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61 function Wide_Width_Enumeration_16
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62 (Names : String;
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63 Indexes : System.Address;
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64 Lo, Hi : Natural;
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65 EM : System.WCh_Con.WC_Encoding_Method) return Natural;
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66 -- Identical to Wide_Width_Enumeration_8 except that it handles types
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67 -- using array (0 .. Num) of Natural_16 for the Indexes table.
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68
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69 function Wide_Width_Enumeration_32
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70 (Names : String;
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71 Indexes : System.Address;
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72 Lo, Hi : Natural;
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73 EM : System.WCh_Con.WC_Encoding_Method) return Natural;
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74 -- Identical to Wide_Width_Enumeration_8 except that it handles types
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75 -- using array (0 .. Num) of Natural_32 for the Indexes table.
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76
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77 function Wide_Wide_Width_Enumeration_8
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78 (Names : String;
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79 Indexes : System.Address;
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80 Lo, Hi : Natural;
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81 EM : System.WCh_Con.WC_Encoding_Method) return Natural;
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82 -- Same function for Wide_Wide_Width attribute
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83
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84 function Wide_Wide_Width_Enumeration_16
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85 (Names : String;
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86 Indexes : System.Address;
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87 Lo, Hi : Natural;
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88 EM : System.WCh_Con.WC_Encoding_Method) return Natural;
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89 -- Same function for Wide_Wide_Width attribute
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90
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91 function Wide_Wide_Width_Enumeration_32
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92 (Names : String;
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93 Indexes : System.Address;
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94 Lo, Hi : Natural;
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95 EM : System.WCh_Con.WC_Encoding_Method) return Natural;
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96 -- Same function for Wide_Wide_Width attribute
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97
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98 end System.WWd_Enum;
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