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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- ADA.EXCEPTIONS.STREAM_ATTRIBUTES --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2005 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 2, 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 COPYING. If not, write --
-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
-- Boston, MA 02110-1301, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
pragma Warnings (Off);
-- Allow withing of non-Preelaborated units in Ada 2005 mode where this
-- package will be categorized as Preelaborate. See AI-362 for details.
-- It is safe in the context of the run-time to violate the rules!
with System.Exception_Table; use System.Exception_Table;
with System.Storage_Elements; use System.Storage_Elements;
pragma Warnings (On);
separate (Ada.Exceptions)
package body Stream_Attributes is
-------------------
-- EId_To_String --
-------------------
function EId_To_String (X : Exception_Id) return String is
begin
if X = Null_Id then
return "";
else
return Exception_Name (X);
end if;
end EId_To_String;
------------------
-- EO_To_String --
------------------
-- We use the null string to represent the null occurrence, otherwise
-- we output the Exception_Information string for the occurrence.
function EO_To_String (X : Exception_Occurrence) return String is
begin
if X.Id = Null_Id then
return "";
else
return Exception_Information (X);
end if;
end EO_To_String;
-------------------
-- String_To_EId --
-------------------
function String_To_EId (S : String) return Exception_Id is
begin
if S = "" then
return Null_Id;
else
return Exception_Id (Internal_Exception (S));
end if;
end String_To_EId;
------------------
-- String_To_EO --
------------------
function String_To_EO (S : String) return Exception_Occurrence is
From : Natural;
To : Integer;
X : aliased Exception_Occurrence;
-- This is the exception occurrence we will create
procedure Bad_EO;
pragma No_Return (Bad_EO);
-- Signal bad exception occurrence string
procedure Next_String;
-- On entry, To points to last character of previous line of the
-- message, terminated by LF. On return, From .. To are set to
-- specify the next string, or From > To if there are no more lines.
procedure Bad_EO is
begin
Raise_Exception
(Program_Error'Identity,
"bad exception occurrence in stream input");
-- The following junk raise of Program_Error is required because
-- this is a No_Return function, and unfortunately Raise_Exception
-- can return (this particular call can't, but the back end is not
-- clever enough to know that).
raise Program_Error;
end Bad_EO;
procedure Next_String is
begin
From := To + 2;
if From < S'Last then
To := From + 1;
while To < S'Last - 1 loop
if To >= S'Last then
Bad_EO;
elsif S (To + 1) = ASCII.LF then
exit;
else
To := To + 1;
end if;
end loop;
end if;
end Next_String;
-- Start of processing for String_To_EO
begin
if S = "" then
return Null_Occurrence;
else
X.Cleanup_Flag := False;
To := S'First - 2;
Next_String;
if S (From .. From + 15) /= "Exception name: " then
Bad_EO;
end if;
X.Id := Exception_Id (Internal_Exception (S (From + 16 .. To)));
Next_String;
if From <= To and then S (From) = 'M' then
if S (From .. From + 8) /= "Message: " then
Bad_EO;
end if;
X.Msg_Length := To - From - 8;
X.Msg (1 .. X.Msg_Length) := S (From + 9 .. To);
Next_String;
else
X.Msg_Length := 0;
end if;
X.Pid := 0;
if From <= To and then S (From) = 'P' then
if S (From .. From + 3) /= "PID:" then
Bad_EO;
end if;
From := From + 5; -- skip past PID: space
while From <= To loop
X.Pid := X.Pid * 10 +
(Character'Pos (S (From)) - Character'Pos ('0'));
From := From + 1;
end loop;
Next_String;
end if;
X.Num_Tracebacks := 0;
if From <= To then
if S (From .. To) /= "Call stack traceback locations:" then
Bad_EO;
end if;
Next_String;
loop
exit when From > To;
declare
Ch : Character;
C : Integer_Address;
N : Integer_Address;
begin
if S (From) /= '0'
or else S (From + 1) /= 'x'
then
Bad_EO;
else
From := From + 2;
end if;
C := 0;
while From <= To loop
Ch := S (From);
if Ch in '0' .. '9' then
N :=
Character'Pos (S (From)) - Character'Pos ('0');
elsif Ch in 'a' .. 'f' then
N :=
Character'Pos (S (From)) - Character'Pos ('a') + 10;
elsif Ch = ' ' then
From := From + 1;
exit;
else
Bad_EO;
end if;
C := C * 16 + N;
From := From + 1;
end loop;
if X.Num_Tracebacks = Max_Tracebacks then
Bad_EO;
end if;
X.Num_Tracebacks := X.Num_Tracebacks + 1;
X.Tracebacks (X.Num_Tracebacks) :=
TBE.TB_Entry_For (To_Address (C));
end;
end loop;
end if;
-- If an exception was converted to a string, it must have
-- already been raised, so flag it accordingly and we are done.
X.Exception_Raised := True;
return X;
end if;
end String_To_EO;
end Stream_Attributes;
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