annotate gcc/ada/libgnat/s-pack24.ads @ 131:84e7813d76e9

gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
parents 04ced10e8804
children 1830386684a0
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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 . P A C K _ 2 4 --
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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) 1992-2018, 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 -- Handling of packed arrays with Component_Size = 24
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33
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34 package System.Pack_24 is
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35 pragma Preelaborate;
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36
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37 Bits : constant := 24;
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38
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39 type Bits_24 is mod 2 ** Bits;
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40 for Bits_24'Size use Bits;
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41
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42 -- In all subprograms below, Rev_SSO is set True if the array has the
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43 -- non-default scalar storage order.
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44
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45 function Get_24
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46 (Arr : System.Address;
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47 N : Natural;
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48 Rev_SSO : Boolean) return Bits_24 with Inline;
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49 -- Arr is the address of the packed array, N is the zero-based
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50 -- subscript. This element is extracted and returned.
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51
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52 procedure Set_24
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53 (Arr : System.Address;
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54 N : Natural;
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55 E : Bits_24;
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56 Rev_SSO : Boolean) with Inline;
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57 -- Arr is the address of the packed array, N is the zero-based
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58 -- subscript. This element is set to the given value.
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59
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60 function GetU_24
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61 (Arr : System.Address;
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62 N : Natural;
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63 Rev_SSO : Boolean) return Bits_24 with Inline;
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64 -- Arr is the address of the packed array, N is the zero-based
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65 -- subscript. This element is extracted and returned. This version
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66 -- is used when Arr may represent an unaligned address.
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67
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68 procedure SetU_24
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69 (Arr : System.Address;
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70 N : Natural;
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71 E : Bits_24;
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72 Rev_SSO : Boolean) with Inline;
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73 -- Arr is the address of the packed array, N is the zero-based
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74 -- subscript. This element is set to the given value. This version
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75 -- is used when Arr may represent an unaligned address
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76
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77 end System.Pack_24;