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-------------------------------------------------------------------------------
-- (C) Altran Praxis Limited
-------------------------------------------------------------------------------
--
-- The SPARK toolset 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. The SPARK toolset is distributed in the hope that it will be
-- useful, but WITHOUT 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 the SPARK toolset; see file
-- COPYING3. If not, go to http://www.gnu.org/licenses for a complete copy of
-- the license.
--
--=============================================================================
separate (ErrorHandler)
package body ErrorBuffer
--# own Buffer is Current_Flow_Error,
--# The_Buffer;
is
subtype Buff_Index is Integer range 1 .. ExaminerConstants.ErrorBufferSize;
subtype Buff_Ptr is Integer range 0 .. ExaminerConstants.ErrorBufferSize;
type Error_Array is array (Buff_Index) of Error_Types.NumericError;
type Buffers is record
ErrorList : Error_Array;
ErrPtr : Buff_Ptr;
end record;
The_Buffer : Buffers;
Current_Flow_Error : Error_Types.NumericError;
--------------------------------------------------------------------------
-- Local Procedures
--------------------------------------------------------------------------
function Null_Error return Error_Types.NumericError
--# global in Dictionary.Dict;
is
begin
return Error_Types.NumericError'
(ErrorType => Error_Types.NoErr,
Position => LexTokenManager.Token_Position'(Start_Line_No => 0,
Start_Pos => 0),
Scope => Dictionary.GlobalScope,
ErrorNum => 0,
Reference => 0,
Name1 => Error_Types.NoName,
Name2 => Error_Types.NoName,
Name3 => Error_Types.NoName);
end Null_Error;
--------------------------------------------------------------------------
-- Exported Procedures
--------------------------------------------------------------------------
procedure Flush (Err_File : in out Error_IO.File_Type)
--# global in Dictionary.Dict;
--# in out SPARK_IO.File_Sys;
--# in out The_Buffer;
--# derives Err_File from *,
--# SPARK_IO.File_Sys,
--# The_Buffer &
--# SPARK_IO.File_Sys from *,
--# Dictionary.Dict,
--# Err_File,
--# The_Buffer &
--# The_Buffer from ;
is
function Is_Less_Than (One, Two : LexTokenManager.Token_Position) return Boolean is
Less_Than : Boolean;
begin
if One.Start_Line_No = Two.Start_Line_No then
Less_Than := One.Start_Pos < Two.Start_Pos;
else
Less_Than := One.Start_Line_No < Two.Start_Line_No;
end if;
return Less_Than;
end Is_Less_Than;
--------------------------
procedure Sort_Buff
--# global in out The_Buffer;
--# derives The_Buffer from *;
is
procedure Swap (X, Y : in Buff_Ptr)
--# global in out The_Buffer;
--# derives The_Buffer from *,
--# X,
--# Y;
is
T : Error_Types.NumericError;
begin
T := The_Buffer.ErrorList (X);
The_Buffer.ErrorList (X) := The_Buffer.ErrorList (Y);
The_Buffer.ErrorList (Y) := T;
end Swap;
begin --Sort_Buff
for I in Buff_Ptr range 1 .. The_Buffer.ErrPtr loop
for J in Buff_Ptr range I .. The_Buffer.ErrPtr loop
if Is_Less_Than (One => The_Buffer.ErrorList (J).Position,
Two => The_Buffer.ErrorList (I).Position) then
Swap (X => I,
Y => J);
end if;
end loop;
end loop;
end Sort_Buff;
------------------------------------------
procedure Merge
--# global in Dictionary.Dict;
--# in The_Buffer;
--# in out Err_File;
--# in out SPARK_IO.File_Sys;
--# derives Err_File from *,
--# SPARK_IO.File_Sys,
--# The_Buffer &
--# SPARK_IO.File_Sys from *,
--# Dictionary.Dict,
--# Err_File,
--# The_Buffer;
is
New_File : Error_IO.File_Type;
Ptr : Buff_Ptr;
Buf_Empty, File_Empty : Boolean;
Buf_Ent, File_Ent : Error_Types.NumericError;
--------------------------------------------------------------------------
procedure Create_Temp (F : out Error_IO.File_Type)
--# global in out SPARK_IO.File_Sys;
--# derives F,
--# SPARK_IO.File_Sys from SPARK_IO.File_Sys;
is
OK : SPARK_IO.File_Status;
Local_F : Error_IO.File_Type := Error_IO.Null_File;
begin
Error_IO.Create (Local_F, OK);
if OK /= SPARK_IO.Ok then
SystemErrors.Fatal_Error
(Sys_Err => SystemErrors.Error_Handler_Temporary_Files,
Msg => "in ErrorBuffer.Create_Temp");
end if;
F := Local_F;
end Create_Temp;
--------------------------------------------------------------------------
procedure Reset_Temp (F : in out Error_IO.File_Type)
--# global in out SPARK_IO.File_Sys;
--# derives F,
--# SPARK_IO.File_Sys from *,
--# F;
is
OK : SPARK_IO.File_Status;
begin
Error_IO.Reset (F, SPARK_IO.In_File, OK);
if OK /= SPARK_IO.Ok then
SystemErrors.Fatal_Error
(Sys_Err => SystemErrors.Error_Handler_Temporary_Files,
Msg => "in ErrorBuffer.Reset_Temp");
end if;
end Reset_Temp;
--------------------------------------------------------------------------
procedure Close_Temp (F : in out Error_IO.File_Type)
--# global in out SPARK_IO.File_Sys;
--# derives F,
--# SPARK_IO.File_Sys from *,
--# F;
is
OK : SPARK_IO.File_Status;
begin
Error_IO.Close (F, OK);
if OK /= SPARK_IO.Ok then
SystemErrors.Fatal_Error
(Sys_Err => SystemErrors.Error_Handler_Temporary_Files,
Msg => "in ErrorBuffer.Close_Temp");
end if;
end Close_Temp;
--------------------------------------------------------------------------
procedure Get_Buffer_Entry (Ent : out Error_Types.NumericError;
Empty : out Boolean)
--# global in Dictionary.Dict;
--# in The_Buffer;
--# in out Ptr;
--# derives Empty,
--# Ptr from Ptr,
--# The_Buffer &
--# Ent from Dictionary.Dict,
--# Ptr,
--# The_Buffer;
is
begin
if Ptr = The_Buffer.ErrPtr then
Ent := Null_Error;
Empty := True;
else
Ptr := Ptr + 1;
Ent := The_Buffer.ErrorList (Ptr);
Empty := False;
end if;
end Get_Buffer_Entry;
begin --Merge
Ptr := 0;
Get_Buffer_Entry (Ent => Buf_Ent,
Empty => Buf_Empty);
if not Buf_Empty then --only merge sort if buffer contains some entries
Create_Temp (F => New_File);
Reset_Temp (F => Err_File);
Error_IO.Get_Numeric_Error (Err_File, File_Ent);
File_Empty := (File_Ent = Error_Types.Empty_NumericError);
while not (Buf_Empty and File_Empty) loop
if File_Empty then
Error_IO.Put_Numeric_Error (New_File, Buf_Ent);
Get_Buffer_Entry (Ent => Buf_Ent,
Empty => Buf_Empty);
elsif Buf_Empty then
Error_IO.Put_Numeric_Error (New_File, File_Ent);
Error_IO.Get_Numeric_Error (Err_File, File_Ent);
File_Empty := (File_Ent = Error_Types.Empty_NumericError);
else --neither empty
if Is_Less_Than (One => Buf_Ent.Position,
Two => File_Ent.Position) then
Error_IO.Put_Numeric_Error (New_File, Buf_Ent);
Get_Buffer_Entry (Ent => Buf_Ent,
Empty => Buf_Empty);
else
Error_IO.Put_Numeric_Error (New_File, File_Ent);
Error_IO.Get_Numeric_Error (Err_File, File_Ent);
File_Empty := (File_Ent = Error_Types.Empty_NumericError);
end if;
end if;
end loop;
--# accept Flow, 10, Err_File, "Expected ineffective assignment";
Close_Temp (F => Err_File);
--# end accept;
Err_File := New_File;
end if;
end Merge;
------------------------------------------
procedure Init_Buff
--# global out The_Buffer;
--# derives The_Buffer from ;
is
begin
The_Buffer.ErrPtr := 0;
--intentional failure to initialize array will cause flow error here
--# accept F, 31, The_Buffer.ErrorList, "Intentional incomplete initialization" &
--# F, 32, The_Buffer.ErrorList, "Intentional incomplete initialization" &
--# F, 602, The_Buffer, The_Buffer.ErrorList, "Intentional incomplete initialization";
end Init_Buff; -- Init. is partial but effecive. Expect 2 errs + 1 warning
begin -- Flush
Sort_Buff;
Merge;
Init_Buff;
end Flush;
--------------------------------------------------------------------------
procedure Add
(Err_File : in out Error_IO.File_Type;
Err_Type : in Error_Types.Error_Class;
Pos : in LexTokenManager.Token_Position;
Scope : in Dictionary.Scopes;
Error_Number : in Natural;
Reference : in Natural;
Name1, Name2, Name3 : in Error_Types.Names;
Echo_Str : out Error_Types.StringError)
--# global in CommandLineData.Content;
--# in Dictionary.Dict;
--# in LexTokenManager.State;
--# in out Conversions.State;
--# in out Current_Flow_Error;
--# in out SPARK_IO.File_Sys;
--# in out The_Buffer;
--# derives Conversions.State,
--# The_Buffer from *,
--# CommandLineData.Content,
--# Current_Flow_Error,
--# Error_Number,
--# Err_Type,
--# Name1,
--# Name2,
--# Name3,
--# Pos,
--# Reference,
--# Scope &
--# Current_Flow_Error from *,
--# CommandLineData.Content,
--# Dictionary.Dict,
--# Error_Number,
--# Err_Type,
--# Name1,
--# Name2,
--# Name3,
--# Pos,
--# Reference,
--# Scope &
--# Echo_Str from CommandLineData.Content,
--# Conversions.State,
--# Current_Flow_Error,
--# Dictionary.Dict,
--# Error_Number,
--# Err_Type,
--# LexTokenManager.State,
--# Name1,
--# Name2,
--# Name3,
--# Pos,
--# Reference,
--# Scope &
--# Err_File from *,
--# CommandLineData.Content,
--# Current_Flow_Error,
--# Error_Number,
--# Err_Type,
--# Name1,
--# Name2,
--# Name3,
--# Pos,
--# Reference,
--# Scope,
--# SPARK_IO.File_Sys,
--# The_Buffer &
--# SPARK_IO.File_Sys from *,
--# CommandLineData.Content,
--# Current_Flow_Error,
--# Dictionary.Dict,
--# Error_Number,
--# Err_File,
--# Err_Type,
--# Name1,
--# Name2,
--# Name3,
--# Pos,
--# Reference,
--# Scope,
--# The_Buffer;
is
New_Entry : Error_Types.NumericError;
procedure Set_To_New_Errors (New_Entry : in out Error_Types.NumericError)
--# derives New_Entry from *;
is
begin
if (New_Entry.ErrorNum = ErrorHandler.Dependency_Err_Number (Err_Type => ErrorHandler.May_Be_Used) and
New_Entry.ErrorType = Error_Types.CondlDependencyErr) then
New_Entry.ErrorNum := ErrorHandler.Dependency_Err_Number (Err_Type => ErrorHandler.May_Be_Used_New);
elsif (New_Entry.ErrorNum = ErrorHandler.Dependency_Err_Number (Err_Type => ErrorHandler.Not_Used) and
New_Entry.ErrorType = Error_Types.UncondDependencyErr) then
New_Entry.ErrorNum := ErrorHandler.Dependency_Err_Number (Err_Type => ErrorHandler.Not_Used_New);
end if;
end Set_To_New_Errors;
procedure Reset_Error_Num (Err_Num : in out Error_Types.NumericError)
--# global in Dictionary.Dict;
--# in out Current_Flow_Error;
--# derives Current_Flow_Error from *,
--# Dictionary.Dict,
--# Err_Num &
--# Err_Num from *,
--# Current_Flow_Error;
is
begin
case Err_Num.ErrorType is
when Error_Types.UncondDependencyErr =>
if Err_Num.ErrorNum = ErrorHandler.Dependency_Err_Number (Err_Type => ErrorHandler.Not_Used_New) then
if Current_Flow_Error.ErrorNum = ErrorHandler.Dependency_Err_Number (Err_Type => ErrorHandler.Not_Used_New)
and then (Err_Num.Name2 = Current_Flow_Error.Name2 and
Err_Num.Scope = Current_Flow_Error.Scope and
Err_Num.Position = Current_Flow_Error.Position) then
-- Continuation
Err_Num.ErrorNum := ErrorHandler.Dependency_Err_Number (Err_Type => ErrorHandler.Not_Used_Continue);
else
-- New Error;
Current_Flow_Error := Err_Num;
end if;
else
Current_Flow_Error := Null_Error;
end if;
when Error_Types.CondlDependencyErr =>
if Err_Num.ErrorNum = ErrorHandler.Dependency_Err_Number (Err_Type => ErrorHandler.May_Be_Used_New) then
if Current_Flow_Error.ErrorNum = ErrorHandler.Dependency_Err_Number (Err_Type => ErrorHandler.May_Be_Used_New)
and then (Err_Num.Name2 = Current_Flow_Error.Name2 and
Err_Num.Scope = Current_Flow_Error.Scope and
Err_Num.Position = Current_Flow_Error.Position) then
-- Continuation
Err_Num.ErrorNum := ErrorHandler.Dependency_Err_Number (Err_Type => ErrorHandler.May_Be_Used_Continue);
else
-- New Error;
Current_Flow_Error := Err_Num;
end if;
else
Current_Flow_Error := Null_Error;
end if;
when others =>
Current_Flow_Error := Null_Error;
end case;
end Reset_Error_Num;
begin
New_Entry :=
Error_Types.NumericError'
(ErrorType => Err_Type,
Position => Pos,
Scope => Scope,
ErrorNum => Error_Number,
Reference => Reference,
Name1 => Name1,
Name2 => Name2,
Name3 => Name3);
if not CommandLineData.Content.Legacy_Errors then
Set_To_New_Errors (New_Entry => New_Entry);
end if;
Reset_Error_Num (Err_Num => New_Entry);
Conversions.ToString (New_Entry, Error_Types.ForScreen, Echo_Str);
The_Buffer.ErrPtr := The_Buffer.ErrPtr + 1;
The_Buffer.ErrorList (The_Buffer.ErrPtr) := New_Entry;
if The_Buffer.ErrPtr = ExaminerConstants.ErrorBufferSize then
Flush (Err_File => Err_File);
end if;
end Add;
begin --init
The_Buffer.ErrPtr := 0;
Current_Flow_Error.ErrorType := Error_Types.NoErr;
Current_Flow_Error.Position := LexTokenManager.Token_Position'(Start_Line_No => 0,
Start_Pos => 0);
Current_Flow_Error.ErrorNum := 0;
Current_Flow_Error.Reference := 0;
Current_Flow_Error.Name1 := Error_Types.NoName;
Current_Flow_Error.Name2 := Error_Types.NoName;
Current_Flow_Error.Name3 := Error_Types.NoName;
--intentional non-initialization of array will cause flow error here
--# accept F, 31, The_Buffer.ErrorList, "Intentional incomplete initialization" &
--# F, 32, The_Buffer.ErrorList, "Intentional incomplete initialization" &
--# F, 602, The_Buffer, The_Buffer.ErrorList, "Intentional incomplete initialization" &
--# F, 31, Current_Flow_Error.Scope, "Intentional incomplete initialization" &
--# F, 32, Current_Flow_Error.Scope, "Intentional incomplete initialization" &
--# F, 602, Current_Flow_Error, Current_Flow_Error.Scope, "Intentional incomplete initialization";
end ErrorBuffer; -- Init. is partial but effective. Expect 4 errs + 2 warnings.
|
