------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- G E T _ S C O S --
-- --
-- B o d y --
-- --
-- Copyright (C) 2009, 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 SCOs; use SCOs;
with Types; use Types;
with Ada.IO_Exceptions; use Ada.IO_Exceptions;
procedure Get_SCOs is
Dnum : Nat;
C : Character;
Loc1 : Source_Location;
Loc2 : Source_Location;
Cond : Character;
Dtyp : Character;
use ASCII;
-- For CR/LF
function At_EOL return Boolean;
-- Skips any spaces, then checks if we are the end of a line. If so,
-- returns True (but does not skip over the EOL sequence). If not,
-- then returns False.
procedure Check (C : Character);
-- Checks that file is positioned at given character, and if so skips past
-- it, If not, raises Data_Error.
function Get_Int return Int;
-- On entry the file is positioned to a digit. On return, the file is
-- positioned past the last digit, and the returned result is the decimal
-- value read. Data_Error is raised for overflow (value greater than
-- Int'Last), or if the initial character is not a digit.
procedure Get_Sloc_Range (Loc1, Loc2 : out Source_Location);
-- Skips initial spaces, then reads a source location range in the form
-- line:col-line:col and places the two source locations in Loc1 and Loc2.
-- Raises Data_Error if format does not match this requirement.
procedure Skip_EOL;
-- Called with the current character about to be read being LF or CR. Skips
-- past CR/LF characters until either a non-CR/LF character is found, or
-- the end of file is encountered.
procedure Skip_Spaces;
-- Skips zero or more spaces at the current position, leaving the file
-- positioned at the first non-blank character (or Types.EOF).
------------
-- At_EOL --
------------
function At_EOL return Boolean is
begin
Skip_Spaces;
return Nextc = CR or else Nextc = LF;
end At_EOL;
-----------
-- Check --
-----------
procedure Check (C : Character) is
begin
if Nextc = C then
Skipc;
else
raise Data_Error;
end if;
end Check;
-------------
-- Get_Int --
-------------
function Get_Int return Int is
Val : Int;
C : Character;
begin
C := Nextc;
Val := 0;
if C not in '0' .. '9' then
raise Data_Error;
end if;
-- Loop to read digits of integer value
loop
declare
pragma Unsuppress (Overflow_Check);
begin
Val := Val * 10 + (Character'Pos (C) - Character'Pos ('0'));
end;
Skipc;
C := Nextc;
exit when C not in '0' .. '9';
end loop;
return Val;
exception
when Constraint_Error =>
raise Data_Error;
end Get_Int;
--------------------
-- Get_Sloc_Range --
--------------------
procedure Get_Sloc_Range (Loc1, Loc2 : out Source_Location) is
pragma Unsuppress (Range_Check);
begin
Skip_Spaces;
Loc1.Line := Logical_Line_Number (Get_Int);
Check (':');
Loc1.Col := Column_Number (Get_Int);
Check ('-');
Loc2.Line := Logical_Line_Number (Get_Int);
Check (':');
Loc2.Col := Column_Number (Get_Int);
exception
when Constraint_Error =>
raise Data_Error;
end Get_Sloc_Range;
--------------
-- Skip_EOL --
--------------
procedure Skip_EOL is
C : Character;
begin
loop
Skipc;
C := Nextc;
exit when C /= LF and then C /= CR;
if C = ' ' then
Skip_Spaces;
C := Nextc;
exit when C /= LF and then C /= CR;
end if;
end loop;
end Skip_EOL;
-----------------
-- Skip_Spaces --
-----------------
procedure Skip_Spaces is
begin
while Nextc = ' ' loop
Skipc;
end loop;
end Skip_Spaces;
-- Start of processing for Get_Scos
begin
SCOs.Initialize;
-- Loop through lines of SCO information
while Nextc = 'C' loop
Skipc;
C := Getc;
-- Make sure first line is a header line
if SCO_Unit_Table.Last = 0 and then C /= ' ' then
raise Data_Error;
end if;
-- Otherwise dispatch on type of line
case C is
-- Header entry
when ' ' =>
-- Complete previous entry if any
if SCO_Unit_Table.Last /= 0 then
SCO_Unit_Table.Table (SCO_Unit_Table.Last).To :=
SCO_Table.Last;
end if;
-- Scan out dependency number and file name
declare
Ptr : String_Ptr := new String (1 .. 32768);
N : Integer;
begin
Skip_Spaces;
Dnum := Get_Int;
Skip_Spaces;
N := 0;
while Nextc > ' ' loop
N := N + 1;
Ptr.all (N) := Getc;
end loop;
-- Make new unit table entry (will fill in To later)
SCO_Unit_Table.Append (
(File_Name => new String'(Ptr.all (1 .. N)),
Dep_Num => Dnum,
From => SCO_Table.Last + 1,
To => 0));
Free (Ptr);
end;
-- Statement entry
when 'S' =>
declare
Typ : Character;
Key : Character;
begin
Skip_Spaces;
Key := 'S';
loop
Typ := Nextc;
if Typ in '1' .. '9' then
Typ := ' ';
else
Skipc;
end if;
Get_Sloc_Range (Loc1, Loc2);
Add_SCO
(C1 => Key,
C2 => Typ,
From => Loc1,
To => Loc2,
Last => At_EOL);
exit when At_EOL;
Key := 's';
end loop;
end;
-- Decision entry
when 'I' | 'E' | 'P' | 'W' | 'X' =>
Dtyp := C;
Skip_Spaces;
C := Getc;
-- Case of simple condition
if C = 'c' or else C = 't' or else C = 'f' then
Cond := C;
Get_Sloc_Range (Loc1, Loc2);
Add_SCO
(C1 => Dtyp,
C2 => Cond,
From => Loc1,
To => Loc2,
Last => True);
-- Complex expression
else
Add_SCO (C1 => Dtyp, Last => False);
-- Loop through terms in complex expression
while C /= CR and then C /= LF loop
if C = 'c' or else C = 't' or else C = 'f' then
Cond := C;
Skipc;
Get_Sloc_Range (Loc1, Loc2);
Add_SCO
(C2 => Cond,
From => Loc1,
To => Loc2,
Last => False);
elsif C = '!' or else
C = '^' or else
C = '&' or else
C = '|'
then
Skipc;
Add_SCO (C1 => C, Last => False);
elsif C = ' ' then
Skip_Spaces;
else
raise Data_Error;
end if;
C := Nextc;
end loop;
-- Reset Last indication to True for last entry
SCO_Table.Table (SCO_Table.Last).Last := True;
end if;
when others =>
raise Data_Error;
end case;
Skip_EOL;
end loop;
-- Here with all SCO's stored, complete last SCO Unit table entry
SCO_Unit_Table.Table (SCO_Unit_Table.Last).To := SCO_Table.Last;
end Get_SCOs;