356 lines
9.6 KiB
Ada
356 lines
9.6 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- G E T _ S C O S --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 2009, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING3. If not, go to --
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-- http://www.gnu.org/licenses for a complete copy of the license. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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with SCOs; use SCOs;
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with Types; use Types;
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with Ada.IO_Exceptions; use Ada.IO_Exceptions;
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procedure Get_SCOs is
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Dnum : Nat;
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C : Character;
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Loc1 : Source_Location;
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Loc2 : Source_Location;
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Cond : Character;
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Dtyp : Character;
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use ASCII;
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-- For CR/LF
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function At_EOL return Boolean;
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-- Skips any spaces, then checks if we are the end of a line. If so,
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-- returns True (but does not skip over the EOL sequence). If not,
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-- then returns False.
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procedure Check (C : Character);
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-- Checks that file is positioned at given character, and if so skips past
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-- it, If not, raises Data_Error.
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function Get_Int return Int;
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-- On entry the file is positioned to a digit. On return, the file is
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-- positioned past the last digit, and the returned result is the decimal
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-- value read. Data_Error is raised for overflow (value greater than
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-- Int'Last), or if the initial character is not a digit.
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procedure Get_Sloc_Range (Loc1, Loc2 : out Source_Location);
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-- Skips initial spaces, then reads a source location range in the form
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-- line:col-line:col and places the two source locations in Loc1 and Loc2.
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-- Raises Data_Error if format does not match this requirement.
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procedure Skip_EOL;
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-- Called with the current character about to be read being LF or CR. Skips
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-- past CR/LF characters until either a non-CR/LF character is found, or
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-- the end of file is encountered.
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procedure Skip_Spaces;
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-- Skips zero or more spaces at the current position, leaving the file
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-- positioned at the first non-blank character (or Types.EOF).
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------------
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-- At_EOL --
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------------
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function At_EOL return Boolean is
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begin
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Skip_Spaces;
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return Nextc = CR or else Nextc = LF;
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end At_EOL;
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-----------
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-- Check --
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-----------
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procedure Check (C : Character) is
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begin
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if Nextc = C then
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Skipc;
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else
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raise Data_Error;
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end if;
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end Check;
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-------------
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-- Get_Int --
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-------------
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function Get_Int return Int is
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Val : Int;
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C : Character;
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begin
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C := Nextc;
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Val := 0;
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if C not in '0' .. '9' then
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raise Data_Error;
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end if;
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-- Loop to read digits of integer value
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loop
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declare
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pragma Unsuppress (Overflow_Check);
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begin
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Val := Val * 10 + (Character'Pos (C) - Character'Pos ('0'));
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end;
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Skipc;
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C := Nextc;
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exit when C not in '0' .. '9';
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end loop;
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return Val;
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exception
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when Constraint_Error =>
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raise Data_Error;
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end Get_Int;
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--------------------
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-- Get_Sloc_Range --
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--------------------
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procedure Get_Sloc_Range (Loc1, Loc2 : out Source_Location) is
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pragma Unsuppress (Range_Check);
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begin
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Skip_Spaces;
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Loc1.Line := Logical_Line_Number (Get_Int);
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Check (':');
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Loc1.Col := Column_Number (Get_Int);
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Check ('-');
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Loc2.Line := Logical_Line_Number (Get_Int);
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Check (':');
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Loc2.Col := Column_Number (Get_Int);
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exception
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when Constraint_Error =>
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raise Data_Error;
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end Get_Sloc_Range;
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--------------
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-- Skip_EOL --
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--------------
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procedure Skip_EOL is
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C : Character;
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begin
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loop
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Skipc;
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C := Nextc;
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exit when C /= LF and then C /= CR;
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if C = ' ' then
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Skip_Spaces;
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C := Nextc;
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exit when C /= LF and then C /= CR;
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end if;
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end loop;
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end Skip_EOL;
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-----------------
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-- Skip_Spaces --
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-----------------
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procedure Skip_Spaces is
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begin
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while Nextc = ' ' loop
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Skipc;
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end loop;
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end Skip_Spaces;
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-- Start of processing for Get_Scos
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begin
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SCOs.Initialize;
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-- Loop through lines of SCO information
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while Nextc = 'C' loop
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Skipc;
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C := Getc;
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-- Make sure first line is a header line
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if SCO_Unit_Table.Last = 0 and then C /= ' ' then
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raise Data_Error;
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end if;
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-- Otherwise dispatch on type of line
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case C is
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-- Header entry
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when ' ' =>
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-- Complete previous entry if any
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if SCO_Unit_Table.Last /= 0 then
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SCO_Unit_Table.Table (SCO_Unit_Table.Last).To :=
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SCO_Table.Last;
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end if;
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-- Scan out dependency number and file name
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declare
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Ptr : String_Ptr := new String (1 .. 32768);
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N : Integer;
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begin
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Skip_Spaces;
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Dnum := Get_Int;
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Skip_Spaces;
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N := 0;
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while Nextc > ' ' loop
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N := N + 1;
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Ptr.all (N) := Getc;
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end loop;
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-- Make new unit table entry (will fill in To later)
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SCO_Unit_Table.Append (
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(File_Name => new String'(Ptr.all (1 .. N)),
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Dep_Num => Dnum,
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From => SCO_Table.Last + 1,
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To => 0));
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Free (Ptr);
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end;
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-- Statement entry
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when 'S' =>
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declare
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Typ : Character;
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Key : Character;
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begin
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Skip_Spaces;
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Key := 'S';
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loop
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Typ := Nextc;
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if Typ in '1' .. '9' then
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Typ := ' ';
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else
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Skipc;
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end if;
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Get_Sloc_Range (Loc1, Loc2);
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Add_SCO
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(C1 => Key,
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C2 => Typ,
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From => Loc1,
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To => Loc2,
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Last => At_EOL);
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exit when At_EOL;
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Key := 's';
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end loop;
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end;
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-- Decision entry
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when 'I' | 'E' | 'P' | 'W' | 'X' =>
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Dtyp := C;
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Skip_Spaces;
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C := Getc;
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-- Case of simple condition
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if C = 'c' or else C = 't' or else C = 'f' then
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Cond := C;
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Get_Sloc_Range (Loc1, Loc2);
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Add_SCO
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(C1 => Dtyp,
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C2 => Cond,
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From => Loc1,
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To => Loc2,
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Last => True);
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-- Complex expression
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else
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Add_SCO (C1 => Dtyp, Last => False);
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-- Loop through terms in complex expression
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while C /= CR and then C /= LF loop
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if C = 'c' or else C = 't' or else C = 'f' then
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Cond := C;
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Skipc;
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Get_Sloc_Range (Loc1, Loc2);
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Add_SCO
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(C2 => Cond,
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From => Loc1,
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To => Loc2,
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Last => False);
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elsif C = '!' or else
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C = '^' or else
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C = '&' or else
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C = '|'
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then
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Skipc;
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Add_SCO (C1 => C, Last => False);
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elsif C = ' ' then
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Skip_Spaces;
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else
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raise Data_Error;
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end if;
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C := Nextc;
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end loop;
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-- Reset Last indication to True for last entry
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SCO_Table.Table (SCO_Table.Last).Last := True;
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end if;
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when others =>
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raise Data_Error;
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end case;
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Skip_EOL;
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end loop;
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-- Here with all SCO's stored, complete last SCO Unit table entry
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SCO_Unit_Table.Table (SCO_Unit_Table.Last).To := SCO_Table.Last;
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end Get_SCOs;
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