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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [ada/] [a-exstat.adb] - Blame information for rev 706

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1 706 jeremybenn 
------------------------------------------------------------------------------
2 
--                                                                          --
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--                         GNAT COMPILER COMPONENTS                         --
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--                                                                          --
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--                     ADA.EXCEPTIONS.STREAM_ATTRIBUTES                     --
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--                                                                          --
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--                                 B o d y                                  --
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--                                                                          --
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--          Copyright (C) 1992-2011, 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.                                     --
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--                                                                          --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception,   --
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-- version 3.1, as published by the Free Software Foundation.               --
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--                                                                          --
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-- You should have received a copy of the GNU General Public License and    --
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-- a copy of the GCC Runtime Library Exception along with this program;     --
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-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
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-- <http://www.gnu.org/licenses/>.                                          --
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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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pragma Warnings (Off);
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--  Allow withing of non-Preelaborated units in Ada 2005 mode where this
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--  package will be categorized as Preelaborate. See AI-362 for details.
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--  It is safe in the context of the run-time to violate the rules!
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with System.Exception_Table;  use System.Exception_Table;
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with System.Storage_Elements; use System.Storage_Elements;
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pragma Warnings (On);
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separate (Ada.Exceptions)
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package body Stream_Attributes is
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   -------------------
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   -- EId_To_String --
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   -------------------
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   function EId_To_String (X : Exception_Id) return String is
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   begin
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      if X = Null_Id then
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         return "";
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      else
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         return Exception_Name (X);
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      end if;
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   end EId_To_String;
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   ------------------
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   -- EO_To_String --
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   ------------------
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   --  We use the null string to represent the null occurrence, otherwise
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   --  we output the Exception_Information string for the occurrence.
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   function EO_To_String (X : Exception_Occurrence) return String is
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   begin
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      if X.Id = Null_Id then
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         return "";
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      else
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         return Exception_Information (X);
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      end if;
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   end EO_To_String;
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   -------------------
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   -- String_To_EId --
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   -------------------
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   function String_To_EId (S : String) return Exception_Id is
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   begin
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      if S = "" then
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         return Null_Id;
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      else
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         return Exception_Id (Internal_Exception (S));
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      end if;
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   end String_To_EId;
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   ------------------
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   -- String_To_EO --
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   ------------------
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   function String_To_EO (S : String) return Exception_Occurrence is
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      From : Natural;
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      To   : Integer;
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      X    : aliased Exception_Occurrence;
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      --  This is the exception occurrence we will create
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      procedure Bad_EO;
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      pragma No_Return (Bad_EO);
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      --  Signal bad exception occurrence string
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      procedure Next_String;
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      --  On entry, To points to last character of previous line of the
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      --  message, terminated by LF. On return, From .. To are set to
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      --  specify the next string, or From > To if there are no more lines.
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      procedure Bad_EO is
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      begin
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         Raise_Exception
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           (Program_Error'Identity,
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            "bad exception occurrence in stream input");
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         --  The following junk raise of Program_Error is required because
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         --  this is a No_Return function, and unfortunately Raise_Exception
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         --  can return (this particular call can't, but the back end is not
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         --  clever enough to know that).
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         raise Program_Error;
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      end Bad_EO;
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      procedure Next_String is
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      begin
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         From := To + 2;
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         if From < S'Last then
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            To := From + 1;
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            while To < S'Last - 1 loop
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               if To >= S'Last then
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                  Bad_EO;
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               elsif S (To + 1) = ASCII.LF then
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                  exit;
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               else
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                  To := To + 1;
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               end if;
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            end loop;
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         end if;
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      end Next_String;
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   --  Start of processing for String_To_EO
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   begin
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      if S = "" then
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         return Null_Occurrence;
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      else
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         To := S'First - 2;
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         Next_String;
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         if S (From .. From + 15) /= "Exception name: " then
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            Bad_EO;
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         end if;
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         X.Id := Exception_Id (Internal_Exception (S (From + 16 .. To)));
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         Next_String;
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         if From <= To and then S (From) = 'M' then
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            if S (From .. From + 8) /= "Message: " then
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               Bad_EO;
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            end if;
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            X.Msg_Length := To - From - 8;
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            X.Msg (1 .. X.Msg_Length) := S (From + 9 .. To);
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            Next_String;
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167 
         else
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            X.Msg_Length := 0;
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         end if;
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         X.Pid := 0;
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         if From <= To and then S (From) = 'P' then
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            if S (From .. From + 3) /= "PID:" then
175 
               Bad_EO;
176 
            end if;
177 
 
178 
            From := From + 5; -- skip past PID: space
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180 
            while From <= To loop
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               X.Pid := X.Pid * 10 +
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                          (Character'Pos (S (From)) - Character'Pos ('0'));
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               From := From + 1;
184 
            end loop;
185 
 
186 
            Next_String;
187 
         end if;
188 
 
189 
         X.Num_Tracebacks := 0;
190 
 
191 
         if From <= To then
192 
            if S (From .. To) /= "Call stack traceback locations:" then
193 
               Bad_EO;
194 
            end if;
195 
 
196 
            Next_String;
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            loop
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               exit when From > To;
199 
 
200 
               declare
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                  Ch : Character;
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                  C  : Integer_Address;
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                  N  : Integer_Address;
204 
 
205 
               begin
206 
                  if S (From) /= '0'
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                    or else S (From + 1) /= 'x'
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                  then
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                     Bad_EO;
210 
                  else
211 
                     From := From + 2;
212 
                  end if;
213 
 
214 
                  C := 0;
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                  while From <= To loop
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                     Ch := S (From);
217 
 
218 
                     if Ch in '0' .. '9' then
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                        N :=
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                          Character'Pos (S (From)) - Character'Pos ('0');
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                     elsif Ch in 'a' .. 'f' then
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                        N :=
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                          Character'Pos (S (From)) - Character'Pos ('a') + 10;
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226 
                     elsif Ch = ' ' then
227 
                        From := From + 1;
228 
                        exit;
229 
 
230 
                     else
231 
                        Bad_EO;
232 
                     end if;
233 
 
234 
                     C := C * 16 + N;
235 
 
236 
                     From := From + 1;
237 
                  end loop;
238 
 
239 
                  if X.Num_Tracebacks = Max_Tracebacks then
240 
                     Bad_EO;
241 
                  end if;
242 
 
243 
                  X.Num_Tracebacks := X.Num_Tracebacks + 1;
244 
                  X.Tracebacks (X.Num_Tracebacks) :=
245 
                    TBE.TB_Entry_For (To_Address (C));
246 
               end;
247 
            end loop;
248 
         end if;
249 
 
250 
         --  If an exception was converted to a string, it must have
251 
         --  already been raised, so flag it accordingly and we are done.
252 
 
253 
         X.Exception_Raised := True;
254 
         return X;
255 
      end if;
256 
   end String_To_EO;
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end Stream_Attributes;

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