/usr/share/ada/adainclude/gnatprj/ali-util.ads is in libgnatprj4.8-dev 4.8.2-8ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 | ------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- A L I . U T I L --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2011, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING3. If not, go to --
-- http://www.gnu.org/licenses for a complete copy of the license. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- This child unit provides utility data structures and procedures used
-- for manipulation of ALI data by the gnatbind and gnatmake.
package ALI.Util is
-----------------------
-- Source File Table --
-----------------------
-- A table entry is built for every source file that is in the source
-- dependency table of any ALI file that is part of the current program.
No_Source_Id : constant Source_Id := Source_Id'First;
-- Special value indicating no Source table entry
First_Source_Entry : constant Source_Id := No_Source_Id + 1;
-- Id of first actual entry in table
type Source_Record is record
Sfile : File_Name_Type;
-- Name of source file
Stamp : Time_Stamp_Type;
-- Time stamp value. If Check_Source_Files is set and the source
-- file is located, then Stamp is set from the source file. Otherwise
-- Stamp is set from the latest stamp value found in any of the
-- ALI files for the current program.
Source_Found : Boolean;
-- This flag is set to True if the corresponding source file was
-- located and the Stamp value was set from the actual source file.
-- It is always false if Check_Source_Files is not set.
All_Timestamps_Match : Boolean;
-- This flag is set only if all files referencing this source file
-- have a matching time stamp, and also, if Source_Found is True,
-- then the stamp of the source file also matches. If this flag is
-- True, then checksums for this file are never referenced. We only
-- use checksums if there are time stamp mismatches.
All_Checksums_Match : Boolean;
-- This flag is set only if all files referencing this source file
-- have checksums, and if all these checksums match. If this flag
-- is set to True, then the binder will ignore a timestamp mismatch.
-- An absent checksum causes this flag to be set False, and a mismatch
-- of checksums also causes it to be set False. The checksum of the
-- actual source file (if Source_Found is True) is included only if
-- All_Timestamps_Match is False (since checksums are only interesting
-- if we have time stamp mismatches, and we want to avoid computing the
-- checksum of the source file if it is not needed.)
Checksum : Word;
-- If no dependency line has a checksum for this source file (i.e. the
-- corresponding entries in the source dependency records all have the
-- Checksum_Present flag set False), then this field is undefined. If
-- at least one dependency entry has a checksum present, then this
-- field contains one of the possible checksum values that has been
-- seen. This is used to set All_Checksums_Match properly.
end record;
package Source is new Table.Table (
Table_Component_Type => Source_Record,
Table_Index_Type => Source_Id,
Table_Low_Bound => First_Source_Entry,
Table_Initial => 1000,
Table_Increment => 200,
Table_Name => "Source");
procedure Initialize_ALI_Source;
-- Initialize Source table
--------------------------------------------------
-- Subprograms for Manipulating ALI Information --
--------------------------------------------------
procedure Read_Withed_ALIs
(Id : ALI_Id;
Ignore_Errors : Boolean := False);
-- Process an ALI file which has been read and scanned by looping through
-- all withed units in the ALI file, checking if they have been processed.
-- Each unit that has not yet been processed will be read, scanned, and
-- processed recursively. If Ignore_Errors is True, then failure to read an
-- ALI file is not reported as an error, and scanning continues with other
-- ALI files.
procedure Set_Source_Table (A : ALI_Id);
-- Build source table entry corresponding to the ALI file whose id is A
procedure Set_Source_Table;
-- Build the entire source table
function Time_Stamp_Mismatch
(A : ALI_Id;
Read_Only : Boolean := False) return File_Name_Type;
-- Looks in the Source_Table and checks time stamp mismatches between
-- the sources there and the sources in the Sdep section of ali file whose
-- id is A. If no time stamp mismatches are found No_File is returned.
-- Otherwise return the first file for which there is a mismatch.
-- Note that in check source files mode (Check_Source_Files = True), the
-- time stamp in the Source_Table should be the actual time stamp of the
-- source files. In minimal recompilation mode (Minimal_Recompilation set
-- to True, no mismatch is found if the file's timestamp has not changed.
-- If Read_Only is True, missing sources are not considered.
--------------------------------------------
-- Subprograms for manipulating checksums --
--------------------------------------------
Checksum_Error : constant Word := 16#FFFF_FFFF#;
-- This value is used to indicate an error in computing the checksum.
-- When comparing checksums for smart recompilation, the CRC_Error
-- value is never considered to match. This could possibly result
-- in a false negative, but that is never harmful, it just means
-- that in unusual cases an unnecessary recompilation occurs.
function Get_File_Checksum (Fname : File_Name_Type) return Word;
-- Compute checksum for the given file. As far as possible, this circuit
-- computes exactly the same value computed by the compiler, but it does
-- not matter if it gets it wrong in marginal cases, since the only result
-- is to miss some smart recompilation cases, correct functioning is not
-- affected by a miscomputation. Returns Checksum_Error if the file is
-- missing or has an error.
function Checksums_Match (Checksum1, Checksum2 : Word) return Boolean;
pragma Inline (Checksums_Match);
-- Returns True if Checksum1 and Checksum2 have the same value and are
-- not equal to Checksum_Error, returns False in all other cases. This
-- routine must always be used to compare for checksum equality, to
-- ensure that the case of Checksum_Error is handled properly.
end ALI.Util;
|