/usr/share/ada/adainclude/gnatprj/sinput-c.adb is in libgnatprj4.9-dev 4.9.3-3ubuntu5.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 | ------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S I N P U T . C --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2013, 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. --
-- --
------------------------------------------------------------------------------
with Opt; use Opt;
with System; use System;
with Ada.Unchecked_Conversion;
pragma Warnings (Off);
-- This package is used also by gnatcoll
with System.OS_Lib; use System.OS_Lib;
pragma Warnings (On);
package body Sinput.C is
---------------
-- Load_File --
---------------
function Load_File (Path : String) return Source_File_Index is
Src : Source_Buffer_Ptr;
X : Source_File_Index;
Lo : Source_Ptr;
Hi : Source_Ptr;
Source_File_FD : File_Descriptor;
-- The file descriptor for the current source file. A negative value
-- indicates failure to open the specified source file.
Len : Integer;
-- Length of file (assume no more than 2 gigabytes of source)
Actual_Len : Integer;
Path_Id : File_Name_Type;
File_Id : File_Name_Type;
begin
if Path = "" then
return No_Source_File;
end if;
Source_File.Increment_Last;
X := Source_File.Last;
if X = Source_File.First then
Lo := First_Source_Ptr;
else
Lo := ((Source_File.Table (X - 1).Source_Last + Source_Align) /
Source_Align) * Source_Align;
end if;
Name_Len := Path'Length;
Name_Buffer (1 .. Name_Len) := Path;
Path_Id := Name_Find;
Name_Buffer (Name_Len + 1) := ASCII.NUL;
-- Open the source FD, note that we open in binary mode, because as
-- documented in the spec, the caller is expected to handle either
-- DOS or Unix mode files, and there is no point in wasting time on
-- text translation when it is not required.
Source_File_FD := Open_Read (Name_Buffer'Address, Binary);
if Source_File_FD = Invalid_FD then
Source_File.Decrement_Last;
return No_Source_File;
end if;
Len := Integer (File_Length (Source_File_FD));
-- Set Hi so that length is one more than the physical length,
-- allowing for the extra EOF character at the end of the buffer
Hi := Lo + Source_Ptr (Len);
-- Do the actual read operation
declare
subtype Actual_Source_Buffer is Source_Buffer (Lo .. Hi);
-- Physical buffer allocated
type Actual_Source_Ptr is access Actual_Source_Buffer;
-- This is the pointer type for the physical buffer allocated
Actual_Ptr : constant Actual_Source_Ptr := new Actual_Source_Buffer;
-- And this is the actual physical buffer
begin
-- Allocate source buffer, allowing extra character at end for EOF
-- Some systems (e.g. VMS) have file types that require one
-- read per line, so read until we get the Len bytes or until
-- there are no more characters.
Hi := Lo;
loop
Actual_Len := Read (Source_File_FD, Actual_Ptr (Hi)'Address, Len);
Hi := Hi + Source_Ptr (Actual_Len);
exit when Actual_Len = Len or else Actual_Len <= 0;
end loop;
Actual_Ptr (Hi) := EOF;
-- Now we need to work out the proper virtual origin pointer to
-- return. This is exactly Actual_Ptr (0)'Address, but we have
-- to be careful to suppress checks to compute this address.
declare
pragma Suppress (All_Checks);
pragma Warnings (Off);
-- The following unchecked conversion is aliased safe, since it
-- is not used to create improperly aliased pointer values.
function To_Source_Buffer_Ptr is new
Ada.Unchecked_Conversion (Address, Source_Buffer_Ptr);
pragma Warnings (On);
begin
Src := To_Source_Buffer_Ptr (Actual_Ptr (0)'Address);
end;
end;
-- Read is complete, close the file and we are done (no need to test
-- status from close, since we have successfully read the file).
Close (Source_File_FD);
-- Get the file name, without path information
declare
Index : Positive := Path'Last;
begin
while Index > Path'First loop
exit when Path (Index - 1) = '/';
exit when Path (Index - 1) = Directory_Separator;
Index := Index - 1;
end loop;
Name_Len := Path'Last - Index + 1;
Name_Buffer (1 .. Name_Len) := Path (Index .. Path'Last);
File_Id := Name_Find;
end;
declare
S : Source_File_Record renames Source_File.Table (X);
begin
S := (Debug_Source_Name => File_Id,
File_Name => File_Id,
File_Type => Config,
First_Mapped_Line => No_Line_Number,
Full_Debug_Name => Path_Id,
Full_File_Name => Path_Id,
Full_Ref_Name => Path_Id,
Instance => No_Instance_Id,
Identifier_Casing => Unknown,
Inlined_Call => No_Location,
Inlined_Body => False,
Keyword_Casing => Unknown,
Last_Source_Line => 1,
License => Unknown,
Lines_Table => null,
Lines_Table_Max => 1,
Logical_Lines_Table => null,
Num_SRef_Pragmas => 0,
Reference_Name => File_Id,
Sloc_Adjust => 0,
Source_Checksum => 0,
Source_First => Lo,
Source_Last => Hi,
Source_Text => Src,
Template => No_Source_File,
Unit => No_Unit,
Time_Stamp => Empty_Time_Stamp);
Alloc_Line_Tables (S, Opt.Table_Factor * Alloc.Lines_Initial);
S.Lines_Table (1) := Lo;
end;
Set_Source_File_Index_Table (X);
return X;
end Load_File;
end Sinput.C;
|