/
check_scos.adb
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check_scos.adb
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------------------------------------------------------------------------------
-- --
-- GNATcoverage --
-- --
-- Copyright (C) 2006-2024, AdaCore --
-- --
-- GNATcoverage is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the Free --
-- Software Foundation; either version 3, or (at your option) any later --
-- version. This software is distributed in the hope that it will be useful --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN- --
-- TABILITY 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 this software; see file --
-- COPYING3. If not, go to http://www.gnu.org/licenses for a complete copy --
-- of the license. --
------------------------------------------------------------------------------
with Get_SCOs;
with Put_SCOs;
with Opt; use Opt;
with Namet; use Namet;
with SCOs;
with Types; use Types;
with Ada.Streams; use Ada.Streams;
with Ada.Streams.Stream_IO; use Ada.Streams.Stream_IO;
with GNAT.OS_Lib; use GNAT.OS_Lib;
package body Check_SCOs is
procedure Check_SCO_Syntax (SCO_File_Name : String) is
Infile : File_Type;
Name1 : String_Access;
Outfile_1 : File_Type;
Name2 : String_Access;
Outfile_2 : File_Type;
C : Character;
Stop : exception;
-- Terminate execution
Diff_Exec : constant String_Access := Locate_Exec_On_Path ("diff");
Diff_Result : Integer;
use ASCII;
begin
-- Read the SCO information from the SCO file, and use Get_SCOs to store
-- this in binary form in the internal tables in SCOs. Then Put_SCO is
-- used to write the information from these tables back into text form.
-- This output is compared with the original SCO information in the ALI
-- file and the two should be identical. If not an error message is
-- output.
-- Use ALI file name in argument as base for temporary file names, so
-- that the diff output (if any) contains an indication of that file
-- name. This also allows several parallel instances of SCO_Test to run
-- in the same directory without clobbering each other.
Name1 := new String'(SCO_File_Name & ".1");
Name2 := new String'(SCO_File_Name & ".2");
Open (Infile, In_File, SCO_File_Name);
Create (Outfile_1, Out_File, Name1.all);
Create (Outfile_2, Out_File, Name2.all);
-- Read input file till we get to first 'C' line
Process : declare
function Get_Char (F : File_Type) return Character;
-- Read one character from specified file
procedure Put_Char (F : File_Type; C : Character);
-- Write one character to specified file
Last_C : Character := ASCII.NUL;
-- Last character written to Outfile_1, to suppress blank lines
--------------
-- Get_Char --
--------------
function Get_Char (F : File_Type) return Character is
Item : Stream_Element_Array (1 .. 1);
Last : Stream_Element_Offset;
begin
Read (F, Item, Last);
if Last /= 1 then
return Types.EOF;
else
return Character'Val (Item (1));
end if;
end Get_Char;
--------------
-- Put_Char --
--------------
procedure Put_Char (F : File_Type; C : Character) is
Item : Stream_Element_Array (1 .. 1);
begin
if C /= CR and then C /= EOF then
Item (1) := Character'Pos (C);
Write (F, Item);
end if;
end Put_Char;
-- Subprograms used by Get_SCO (these also copy the output to
-- Outfile_1 for later comparison with the output generated by
-- Put_SCO).
function Getc return Character;
function Nextc return Character;
procedure Skipc;
----------
-- Getc --
----------
function Getc return Character is
C : Character;
begin
C := Get_Char (Infile);
-- Put C to Outfile_1, except when seeing multiple successive LF
if Last_C /= ASCII.LF or else C /= ASCII.LF then
Put_Char (Outfile_1, C);
Last_C := C;
end if;
return C;
end Getc;
-----------
-- Nextc --
-----------
function Nextc return Character is
C : Character;
begin
C := Get_Char (Infile);
if C /= EOF then
Set_Index (Infile, Index (Infile) - 1);
end if;
return C;
end Nextc;
-----------
-- Skipc --
-----------
procedure Skipc is
C : Character;
pragma Unreferenced (C);
begin
C := Getc;
end Skipc;
-- Subprograms used by Put_SCOs, which write information to Outfile_2
procedure Write_Info_Char (C : Character);
procedure Write_Info_Initiate (Key : Character);
procedure Write_Info_Name (Nam : Name_Id);
procedure Write_Info_Nat (N : Nat);
procedure Write_Info_Terminate;
---------------------
-- Write_Info_Char --
---------------------
procedure Write_Info_Char (C : Character) is
begin
Put_Char (Outfile_2, C);
end Write_Info_Char;
-------------------------
-- Write_Info_Initiate --
-------------------------
procedure Write_Info_Initiate (Key : Character) is
begin
Write_Info_Char (Key);
end Write_Info_Initiate;
---------------------
-- Write_Info_Name --
---------------------
procedure Write_Info_Name (Nam : Name_Id) is
begin
Get_Name_String (Nam);
for J in 1 .. Name_Len loop
Write_Info_Char (Name_Buffer (J));
end loop;
end Write_Info_Name;
--------------------
-- Write_Info_Nat --
--------------------
procedure Write_Info_Nat (N : Nat) is
begin
if N > 9 then
Write_Info_Nat (N / 10);
end if;
Write_Info_Char (Character'Val (48 + N mod 10));
end Write_Info_Nat;
--------------------------
-- Write_Info_Terminate --
--------------------------
procedure Write_Info_Terminate is
begin
Write_Info_Char (LF);
end Write_Info_Terminate;
-- Local instantiations of Put_SCOs and Get_SCOs
procedure Get_SCO_Info is new Get_SCOs;
procedure Put_SCO_Info is new Put_SCOs;
-- Start of processing for Process
begin
-- Loop to skip till first C line
loop
C := Get_Char (Infile);
if C = EOF then
raise Stop;
elsif C = LF or else C = CR then
loop
C := Get_Char (Infile);
exit when C /= LF and then C /= CR;
end loop;
exit when C = 'C';
end if;
end loop;
-- Position back to initial C of first C line
Set_Index (Infile, Index (Infile) - 1);
-- Read SCOS to internal SCO tables, also copying SCO info to
-- Outfile_1.
SCOs.Initialize;
Get_SCO_Info;
-- Write SCOs, including instance table information, from internal
-- SCO tables to Outfile_2.
Generate_SCO_Instance_Table := True;
Put_SCO_Info;
-- Note: when copying the original ALI file to Outfile_1, we remove
-- blank lines. So, when generating Outfile_2, we must likewise omit
-- the trailing blank line that normally appears in ALI files (see
-- comment at end of lib-writ.adb).
-- Flush to disk
Close (Infile);
Close (Outfile_1);
Close (Outfile_2);
-- Now Outfile_1 and Outfile_2 should be identical
Diff_Result :=
Spawn (Diff_Exec.all,
Argument_String_To_List
("-u " & Name1.all & " " & Name2.all).all);
if Diff_Result /= 0 then
raise Invalid_Syntax with "diff(1) exit status" & Diff_Result'Img;
end if;
end Process;
exception
when Stop =>
null;
end Check_SCO_Syntax;
end Check_SCOs;