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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 -- A D A . S T R E A M S --
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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 -- This specification is derived from the Ada Reference Manual for use with --
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12 -- GNAT. The copyright notice above, and the license provisions that follow --
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13 -- apply solely to the contents of the part following the private keyword. --
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14 -- --
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15 -- GNAT is free software; you can redistribute it and/or modify it under --
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16 -- terms of the GNU General Public License as published by the Free Soft- --
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17 -- ware Foundation; either version 3, or (at your option) any later ver- --
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18 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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19 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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20 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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21 -- --
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22 -- As a special exception under Section 7 of GPL version 3, you are granted --
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23 -- additional permissions described in the GCC Runtime Library Exception, --
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24 -- version 3.1, as published by the Free Software Foundation. --
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25 -- --
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26 -- You should have received a copy of the GNU General Public License and --
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27 -- a copy of the GCC Runtime Library Exception along with this program; --
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28 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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29 -- <http://www.gnu.org/licenses/>. --
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30 -- --
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31 -- GNAT was originally developed by the GNAT team at New York University. --
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32 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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33 -- --
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34 ------------------------------------------------------------------------------
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35
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36 package Ada.Streams is
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37 pragma Pure;
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38
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39 type Root_Stream_Type is abstract tagged limited private;
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40 pragma Preelaborable_Initialization (Root_Stream_Type);
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41
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42 type Stream_Element is mod 2 ** Standard'Storage_Unit;
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43
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44 type Stream_Element_Offset is new Long_Long_Integer;
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45 -- Stream_Element_Offset needs 64 bits to accommodate large stream files.
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46 -- However, rather than make this explicitly 64-bits we derive from
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47 -- Long_Long_Integer. In normal usage this will have the same effect.
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48 -- But in the case of CodePeer with a target configuration file with a
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49 -- maximum integer size of 32, it allows analysis of this unit.
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50
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51 subtype Stream_Element_Count is
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52 Stream_Element_Offset range 0 .. Stream_Element_Offset'Last;
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53
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54 type Stream_Element_Array is
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55 array (Stream_Element_Offset range <>) of aliased Stream_Element;
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56
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57 procedure Read
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58 (Stream : in out Root_Stream_Type;
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59 Item : out Stream_Element_Array;
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60 Last : out Stream_Element_Offset)
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61 is abstract;
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62
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63 procedure Write
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64 (Stream : in out Root_Stream_Type;
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65 Item : Stream_Element_Array)
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66 is abstract;
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67
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68 private
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69
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70 type Root_Stream_Type is abstract tagged limited null record;
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71
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72 -- Stream attributes for Stream_Element_Array: trivially call the
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73 -- corresponding stream primitive for the whole array, instead of doing
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74 -- so element by element.
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75
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76 procedure Read_SEA
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77 (S : access Root_Stream_Type'Class;
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78 V : out Stream_Element_Array);
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79
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80 procedure Write_SEA
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81 (S : access Root_Stream_Type'Class;
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82 V : Stream_Element_Array);
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83
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84 for Stream_Element_Array'Read use Read_SEA;
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85 for Stream_Element_Array'Write use Write_SEA;
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86
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87 end Ada.Streams;
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