gcc/ada/repinfo-input.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                         R E P I N F O - I N P U T                        --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 2018-2020, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
  19 -- http://www.gnu.org/licenses for a complete copy of the license.          --
  20 --                                                                          --
  21 -- GNAT was originally developed  by the GNAT team at  New York University. --
  22 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  23 --                                                                          --
  24 ------------------------------------------------------------------------------
  25
  26 --  This package provides an alternate way of populating the internal tables
  27 --  of Repinfo from a JSON input rather than the binary blob of the tree file.
  28 --  Note that this is an additive mechanism, i.e. nothing is destroyed in the
  29 --  internal state of the unit when it is used.
  30
  31 --  The first step is to feed the unit with a JSON stream of a specified format
  32 --  (see the spec of Repinfo for its description) by means of Read_JSON_Stream.
  33 --  Then, for each entity whose representation information is present in the
  34 --  JSON stream, the appropriate Get_JSON_* routines can be invoked to override
  35 --  the eponymous fields of the entity in the tree.
  36
  37 package Repinfo.Input is
  38
  39    function Get_JSON_Esize (Name : String) return Node_Ref_Or_Val;
  40    --  Returns the Esize value of the entity specified by Name, which is not
  41    --  the component of a record type, or else No_Uint if no representation
  42    --  information was supplied for the entity. Name is the full qualified name
  43    --  of the entity in lower case letters.
  44
  45    function Get_JSON_RM_Size (Name : String) return Node_Ref_Or_Val;
  46    --  Likewise for the RM_Size
  47
  48    function Get_JSON_Component_Size (Name : String) return Node_Ref_Or_Val;
  49    --  Likewise for the Component_Size of an array type
  50
  51    function Get_JSON_Component_Bit_Offset
  52      (Name        : String;
  53       Record_Name : String) return Node_Ref_Or_Val;
  54    --  Returns the Component_Bit_Offset of the component specified by Name,
  55    --  which is declared in the record type specified by Record_Name, or else
  56    --  No_Uint if no representation information was supplied for the component.
  57    --  Name is the unqualified name of the component whereas Record_Name is the
  58    --  full qualified name of the record type, both in lower case letters.
  59
  60    function Get_JSON_Esize
  61      (Name        : String;
  62       Record_Name : String) return Node_Ref_Or_Val;
  63    --  Likewise for the Esize
  64
  65    Invalid_JSON_Stream : exception;
  66    --  Raised if a format error is detected in the JSON stream
  67
  68    procedure Read_JSON_Stream (Text : Text_Buffer; File_Name : String);
  69    --  Reads a JSON stream and populates internal tables from it. File_Name is
  70    --  only used in error messages issued by the JSON parser.
  71
  72 end Repinfo.Input;