-- --
-- B o d y --
-- --
--- Copyright (C) 1992-2005, Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2009, 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 2, or (at your option) any later ver- --
+-- 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 COPYING. If not, write --
--- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
--- Boston, MA 02110-1301, USA. --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
--- 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. --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
with Ada.Streams; use Ada.Streams;
with Interfaces.C_Streams; use Interfaces.C_Streams;
-with System;
+
with System.File_IO;
with System.CRTL;
-with Unchecked_Conversion;
-with Unchecked_Deallocation;
+with System.WCh_Cnv; use System.WCh_Cnv;
+with System.WCh_Con; use System.WCh_Con;
+
+with Ada.Unchecked_Conversion;
+with Ada.Unchecked_Deallocation;
pragma Elaborate_All (System.File_IO);
-- Needed because of calls to Chain_File in package body elaboration
subtype AP is FCB.AFCB_Ptr;
- function To_FCB is new Unchecked_Conversion (File_Mode, FCB.File_Mode);
- function To_TIO is new Unchecked_Conversion (FCB.File_Mode, File_Mode);
+ function To_FCB is new Ada.Unchecked_Conversion (File_Mode, FCB.File_Mode);
+ function To_TIO is new Ada.Unchecked_Conversion (FCB.File_Mode, File_Mode);
use type FCB.File_Mode;
use type System.CRTL.size_t;
+ WC_Encoding : Character;
+ pragma Import (C, WC_Encoding, "__gl_wc_encoding");
+
+ -----------------------
+ -- Local Subprograms --
+ -----------------------
+
+ function Getc_Immed (File : File_Type) return int;
+ -- This routine is identical to Getc, except that the read is done in
+ -- Get_Immediate mode (i.e. without waiting for a line return).
+
+ function Get_Upper_Half_Char
+ (C : Character;
+ File : File_Type) return Character;
+ -- This function is shared by Get and Get_Immediate to extract an encoded
+ -- upper half character value from the given File. The first byte has
+ -- already been read and is passed in C. The character value is returned as
+ -- the result, and the file pointer is bumped past the character.
+ -- Constraint_Error is raised if the encoded value is outside the bounds of
+ -- type Character.
+
+ function Get_Upper_Half_Char_Immed
+ (C : Character;
+ File : File_Type) return Character;
+ -- This routine is identical to Get_Upper_Half_Char, except that the reads
+ -- are done in Get_Immediate mode (i.e. without waiting for a line return).
+
+ function Has_Upper_Half_Character (Item : String) return Boolean;
+ -- Returns True if any of the characters is in the range 16#80#-16#FF#
+
+ procedure Put_Encoded (File : File_Type; Char : Character);
+ -- Called to output a character Char to the given File, when the encoding
+ -- method for the file is other than brackets, and Char is upper half.
+
+ procedure Set_WCEM (File : in out File_Type);
+ -- Called by Open and Create to set the wide character encoding method for
+ -- the file, processing a WCEM form parameter if one is present. File is
+ -- IN OUT because it may be closed in case of an error.
+
-------------------
-- AFCB_Allocate --
-------------------
-- AFCB_Close --
----------------
- procedure AFCB_Close (File : access Text_AFCB) is
+ procedure AFCB_Close (File : not null access Text_AFCB) is
begin
-- If the file being closed is one of the current files, then close
-- the corresponding current file. It is not clear that this action
-- AFCB_Free --
---------------
- procedure AFCB_Free (File : access Text_AFCB) is
+ procedure AFCB_Free (File : not null access Text_AFCB) is
type FCB_Ptr is access all Text_AFCB;
FT : FCB_Ptr := FCB_Ptr (File);
- procedure Free is new Unchecked_Deallocation (Text_AFCB, FCB_Ptr);
+ procedure Free is new Ada.Unchecked_Deallocation (Text_AFCB, FCB_Ptr);
begin
Free (FT);
procedure Close (File : in out File_Type) is
begin
- FIO.Close (AP (File));
+ FIO.Close (AP (File)'Unrestricted_Access);
end Close;
---------
Text => True);
File.Self := File;
+ Set_WCEM (File);
end Create;
-------------------
procedure Delete (File : in out File_Type) is
begin
- FIO.Delete (AP (File));
+ FIO.Delete (AP (File)'Unrestricted_Access);
end Delete;
-----------------
begin
FIO.Check_Read_Status (AP (File));
- if File.Before_LM then
+ if File.Before_Upper_Half_Character then
+ return False;
+ elsif File.Before_LM then
if File.Before_LM_PM then
return Nextc (File) = EOF;
end if;
begin
FIO.Check_Read_Status (AP (File));
- if File.Before_LM then
+ if File.Before_Upper_Half_Character then
+ return False;
+
+ elsif File.Before_LM then
return True;
else
if not File.Is_Regular_File then
return False;
+ elsif File.Before_Upper_Half_Character then
+ return False;
+
elsif File.Before_LM then
if File.Before_LM_PM then
return True;
begin
FIO.Check_Read_Status (AP (File));
- if File.Before_LM then
+ if File.Before_Upper_Half_Character then
+ File.Before_Upper_Half_Character := False;
+ Item := File.Saved_Upper_Half_Character;
+
+ elsif File.Before_LM then
File.Before_LM := False;
File.Col := 1;
-- Get_Immediate --
-------------------
- -- More work required here ???
-
procedure Get_Immediate
(File : File_Type;
Item : out Character)
is
ch : int;
- end_of_file : int;
-
- procedure getc_immediate
- (stream : FILEs;
- ch : out int;
- end_of_file : out int);
- pragma Import (C, getc_immediate, "getc_immediate");
begin
FIO.Check_Read_Status (AP (File));
- if File.Before_LM then
+ if File.Before_Upper_Half_Character then
+ File.Before_Upper_Half_Character := False;
+ Item := File.Saved_Upper_Half_Character;
+
+ elsif File.Before_LM then
File.Before_LM := False;
File.Before_LM_PM := False;
- ch := LM;
+ Item := Character'Val (LM);
else
- getc_immediate (File.Stream, ch, end_of_file);
+ ch := Getc_Immed (File);
- if ferror (File.Stream) /= 0 then
- raise Device_Error;
- elsif end_of_file /= 0 then
+ if ch = EOF then
raise End_Error;
+ else
+ if not Is_Start_Of_Encoding
+ (Character'Val (ch), File.WC_Method)
+ then
+ Item := Character'Val (ch);
+ else
+ Item := Get_Upper_Half_Char_Immed (Character'Val (ch), File);
+ end if;
end if;
end if;
-
- Item := Character'Val (ch);
end Get_Immediate;
procedure Get_Immediate
begin
FIO.Check_Read_Status (AP (File));
+ Available := True;
- -- If we are logically before an end of line, but physically after it,
- -- then we just return the end of line character, no I/O is necessary.
+ if File.Before_Upper_Half_Character then
+ File.Before_Upper_Half_Character := False;
+ Item := File.Saved_Upper_Half_Character;
- if File.Before_LM then
+ elsif File.Before_LM then
File.Before_LM := False;
File.Before_LM_PM := False;
-
- Available := True;
Item := Character'Val (LM);
- -- Normal case where a read operation is required
-
else
getc_immediate_nowait (File.Stream, ch, end_of_file, avail);
else
Available := True;
- Item := Character'Val (ch);
+
+ if Is_Start_Of_Encoding
+ (Character'Val (ch), File.WC_Method)
+ then
+ Item := Character'Val (ch);
+ else
+ Item := Get_Upper_Half_Char_Immed (Character'Val (ch), File);
+ end if;
end if;
end if;
return Get_Line (Current_In);
end Get_Line;
+ -------------------------
+ -- Get_Upper_Half_Char --
+ -------------------------
+
+ function Get_Upper_Half_Char
+ (C : Character;
+ File : File_Type) return Character
+ is
+ Result : Wide_Character;
+
+ function In_Char return Character;
+ -- Function used to obtain additional characters it the wide character
+ -- sequence is more than one character long.
+
+ function WC_In is new Char_Sequence_To_Wide_Char (In_Char);
+
+ -------------
+ -- In_Char --
+ -------------
+
+ function In_Char return Character is
+ ch : constant Integer := Getc (File);
+ begin
+ if ch = EOF then
+ raise End_Error;
+ else
+ return Character'Val (ch);
+ end if;
+ end In_Char;
+
+ -- Start of processing for Get_Upper_Half_Char
+
+ begin
+ Result := WC_In (C, File.WC_Method);
+
+ if Wide_Character'Pos (Result) > 16#FF# then
+ raise Constraint_Error with
+ "invalid wide character in Text_'I'O input";
+ else
+ return Character'Val (Wide_Character'Pos (Result));
+ end if;
+ end Get_Upper_Half_Char;
+
+ -------------------------------
+ -- Get_Upper_Half_Char_Immed --
+ -------------------------------
+
+ function Get_Upper_Half_Char_Immed
+ (C : Character;
+ File : File_Type) return Character
+ is
+ Result : Wide_Character;
+
+ function In_Char return Character;
+ -- Function used to obtain additional characters it the wide character
+ -- sequence is more than one character long.
+
+ function WC_In is new Char_Sequence_To_Wide_Char (In_Char);
+
+ -------------
+ -- In_Char --
+ -------------
+
+ function In_Char return Character is
+ ch : constant Integer := Getc_Immed (File);
+ begin
+ if ch = EOF then
+ raise End_Error;
+ else
+ return Character'Val (ch);
+ end if;
+ end In_Char;
+
+ -- Start of processing for Get_Upper_Half_Char_Immed
+
+ begin
+ Result := WC_In (C, File.WC_Method);
+
+ if Wide_Character'Pos (Result) > 16#FF# then
+ raise Constraint_Error with
+ "invalid wide character in Text_'I'O input";
+ else
+ return Character'Val (Wide_Character'Pos (Result));
+ end if;
+ end Get_Upper_Half_Char_Immed;
+
----------
-- Getc --
----------
end if;
end Getc;
+ ----------------
+ -- Getc_Immed --
+ ----------------
+
+ function Getc_Immed (File : File_Type) return int is
+ ch : int;
+ end_of_file : int;
+
+ procedure getc_immediate
+ (stream : FILEs; ch : out int; end_of_file : out int);
+ pragma Import (C, getc_immediate, "getc_immediate");
+
+ begin
+ FIO.Check_Read_Status (AP (File));
+
+ if File.Before_LM then
+ File.Before_LM := False;
+ File.Before_LM_PM := False;
+ ch := LM;
+
+ else
+ getc_immediate (File.Stream, ch, end_of_file);
+
+ if ferror (File.Stream) /= 0 then
+ raise Device_Error;
+ elsif end_of_file /= 0 then
+ return EOF;
+ end if;
+ end if;
+
+ return ch;
+ end Getc_Immed;
+
+ ------------------------------
+ -- Has_Upper_Half_Character --
+ ------------------------------
+
+ function Has_Upper_Half_Character (Item : String) return Boolean is
+ begin
+ for J in Item'Range loop
+ if Character'Pos (Item (J)) >= 16#80# then
+ return True;
+ end if;
+ end loop;
+
+ return False;
+ end Has_Upper_Half_Character;
+
-------------
-- Is_Open --
-------------
begin
FIO.Check_Read_Status (AP (File));
+ -- If we are logically before a line mark, we can return immediately
+
if File.Before_LM then
End_Of_Line := True;
Item := ASCII.NUL;
+ -- If we are before an upper half character just return it (this can
+ -- happen if there are two calls to Look_Ahead in a row).
+
+ elsif File.Before_Upper_Half_Character then
+ End_Of_Line := False;
+ Item := File.Saved_Upper_Half_Character;
+
+ -- Otherwise we must read a character from the input stream
+
else
- ch := Nextc (File);
+ ch := Getc (File);
if ch = LM
or else ch = EOF
or else (ch = PM and then File.Is_Regular_File)
then
End_Of_Line := True;
+ Ungetc (ch, File);
Item := ASCII.NUL;
- else
+
+ -- Case where character obtained does not represent the start of an
+ -- encoded sequence so it stands for itself and we can unget it with
+ -- no difficulty.
+
+ elsif not Is_Start_Of_Encoding
+ (Character'Val (ch), File.WC_Method)
+ then
End_Of_Line := False;
+ Ungetc (ch, File);
Item := Character'Val (ch);
+
+ -- For the start of an encoding, we read the character using the
+ -- Get_Upper_Half_Char routine. It will occupy more than one byte
+ -- so we can't put it back with ungetc. Instead we save it in the
+ -- control block, setting a flag that everyone interested in reading
+ -- characters must test before reading the stream.
+
+ else
+ Item := Get_Upper_Half_Char (Character'Val (ch), File);
+ End_Of_Line := False;
+ File.Saved_Upper_Half_Character := Item;
+ File.Before_Upper_Half_Character := True;
end if;
end if;
end Look_Ahead;
Text => True);
File.Self := File;
+ Set_WCEM (File);
end Open;
----------
New_Line (File);
end if;
- if fputc (Character'Pos (Item), File.Stream) = EOF then
- raise Device_Error;
+ -- If lower half character, or brackets encoding, output directly
+
+ if Character'Pos (Item) < 16#80#
+ or else File.WC_Method = WCEM_Brackets
+ then
+ if fputc (Character'Pos (Item), File.Stream) = EOF then
+ raise Device_Error;
+ end if;
+
+ -- Case of upper half character with non-brackets encoding
+
+ else
+ Put_Encoded (File, Item);
end if;
File.Col := File.Col + 1;
New_Line (Current_Out);
end if;
- if fputc (Character'Pos (Item), Current_Out.Stream) = EOF then
- raise Device_Error;
+ -- If lower half character, or brackets encoding, output directly
+
+ if Character'Pos (Item) < 16#80#
+ or else Default_WCEM = WCEM_Brackets
+ then
+ if fputc (Character'Pos (Item), Current_Out.Stream) = EOF then
+ raise Device_Error;
+ end if;
+
+ -- Case of upper half character with non-brackets encoding
+
+ else
+ Put_Encoded (Current_Out, Item);
end if;
Current_Out.Col := Current_Out.Col + 1;
begin
FIO.Check_Write_Status (AP (File));
+ -- Only have something to do if string is non-null
+
if Item'Length > 0 then
- -- If we have bounded lines, then do things character by
- -- character (this seems a rare case anyway!)
+ -- If we have bounded lines, or if the file encoding is other than
+ -- Brackets and the string has at least one upper half character,
+ -- then output the string character by character.
- if File.Line_Length /= 0 then
+ if File.Line_Length /= 0
+ or else (File.WC_Method /= WCEM_Brackets
+ and then Has_Upper_Half_Character (Item))
+ then
for J in Item'Range loop
Put (File, Item (J));
end loop;
Put (Current_Out, Item);
end Put;
+ -----------------
+ -- Put_Encoded --
+ -----------------
+
+ procedure Put_Encoded (File : File_Type; Char : Character) is
+ procedure Out_Char (C : Character);
+ -- Procedure to output one character of an upper half encoded sequence
+
+ procedure WC_Out is new Wide_Char_To_Char_Sequence (Out_Char);
+
+ --------------
+ -- Out_Char --
+ --------------
+
+ procedure Out_Char (C : Character) is
+ begin
+ Putc (Character'Pos (C), File);
+ end Out_Char;
+
+ -- Start of processing for Put_Encoded
+
+ begin
+ WC_Out (Wide_Character'Val (Character'Pos (Char)), File.WC_Method);
+ end Put_Encoded;
+
--------------
-- Put_Line --
--------------
begin
FIO.Check_Write_Status (AP (File));
- -- If we have bounded lines, then just do a put and a new line. In
- -- this case we will end up doing things character by character in
- -- any case, and it is a rare situation.
+ -- If we have bounded lines, or if the file encoding is other than
+ -- Brackets and the string has at least one upper half character, then
+ -- output the string character by character.
+
+ if File.Line_Length /= 0
+ or else (File.WC_Method /= WCEM_Brackets
+ and then Has_Upper_Half_Character (Item))
+ then
+ for J in Item'Range loop
+ Put (File, Item (J));
+ end loop;
- if File.Line_Length /= 0 then
- Put (File, Item);
New_Line (File);
return;
end if;
+ -- Normal case where we do not need to output character by character
+
-- We setup a single string that has the necessary terminators and
-- then write it with a single call. The reason for doing this is
-- that it gives better behavior for the use of Put_Line in multi-
pragma Warnings (Off, Discard_ch);
begin
+ -- Need to deal with Before_Upper_Half_Character ???
+
if File.Mode /= FCB.In_File then
raise Mode_Error;
end if;
end if;
Terminate_Line (File);
- FIO.Reset (AP (File), To_FCB (Mode));
+ FIO.Reset (AP (File)'Unrestricted_Access, To_FCB (Mode));
File.Page := 1;
File.Line := 1;
File.Col := 1;
procedure Reset (File : in out File_Type) is
begin
Terminate_Line (File);
- FIO.Reset (AP (File));
+ FIO.Reset (AP (File)'Unrestricted_Access);
File.Page := 1;
File.Line := 1;
File.Col := 1;
Set_Page_Length (Current_Out, To);
end Set_Page_Length;
+ --------------
+ -- Set_WCEM --
+ --------------
+
+ procedure Set_WCEM (File : in out File_Type) is
+ Start : Natural;
+ Stop : Natural;
+
+ begin
+ File.WC_Method := WCEM_Brackets;
+ FIO.Form_Parameter (File.Form.all, "wcem", Start, Stop);
+
+ if Start = 0 then
+ File.WC_Method := WCEM_Brackets;
+
+ else
+ if Stop = Start then
+ for J in WC_Encoding_Letters'Range loop
+ if File.Form (Start) = WC_Encoding_Letters (J) then
+ File.WC_Method := J;
+ return;
+ end if;
+ end loop;
+ end if;
+
+ Close (File);
+ raise Use_Error with "invalid WCEM form parameter";
+ end if;
+ end Set_WCEM;
+
---------------
-- Skip_Line --
---------------
for L in 1 .. Spacing loop
if File.Before_LM then
File.Before_LM := False;
- File.Before_LM_PM := False;
+
+ -- Note that if File.Before_LM_PM is currently set, we also have
+ -- to reset it (because it makes sense for Before_LM_PM to be set
+ -- only when Before_LM is also set). This is done later on in this
+ -- subprogram, as soon as Before_LM_PM has been taken into account
+ -- for the purpose of page and line counts.
else
ch := Getc (File);
Ungetc (ch, File);
end if;
end if;
-
end loop;
+
+ File.Before_Upper_Half_Character := False;
end Skip_Line;
procedure Skip_Line (Spacing : Positive_Count := 1) is
File.Page := File.Page + 1;
File.Line := 1;
File.Col := 1;
+ File.Before_Upper_Half_Character := False;
end Skip_Page;
procedure Skip_Page is
(File : in out Text_AFCB;
Item : Stream_Element_Array)
is
+ pragma Warnings (Off, File);
+ -- Because in this implementation we don't need IN OUT, we only read
function Has_Translated_Characters return Boolean;
-- return True if Item array contains a character which will be
-- character under DOS based systems which is character 10.
text_translation_required : Boolean;
+ for text_translation_required'Size use Character'Size;
pragma Import (C, text_translation_required,
"__gnat_text_translation_required");
Siz : constant size_t := Item'Length;
+ -------------------------------
+ -- Has_Translated_Characters --
+ -------------------------------
+
function Has_Translated_Characters return Boolean is
begin
for K in Item'Range loop
end Has_Translated_Characters;
Needs_Binary_Write : constant Boolean :=
- text_translation_required and then Has_Translated_Characters;
+ text_translation_required
+ and then Has_Translated_Characters;
+
+ -- Start of processing for Write
begin
if File.Mode = FCB.In_File then
-- with text mode if needed.
if Needs_Binary_Write then
-
if fflush (File.Stream) = -1 then
raise Device_Error;
end if;
-- we reset to text mode.
if Needs_Binary_Write then
-
if fflush (File.Stream) = -1 then
raise Device_Error;
end if;
-- null character in the runtime, here the null characters are added just
-- to have a correct filename length.
- Err_Name : aliased String := "*stderr" & ASCII.Nul;
- In_Name : aliased String := "*stdin" & ASCII.Nul;
- Out_Name : aliased String := "*stdout" & ASCII.Nul;
+ Err_Name : aliased String := "*stderr" & ASCII.NUL;
+ In_Name : aliased String := "*stdin" & ASCII.NUL;
+ Out_Name : aliased String := "*stdout" & ASCII.NUL;
+
begin
-------------------------------
-- Initialize Standard Files --
-------------------------------
+ for J in WC_Encoding_Method loop
+ if WC_Encoding = WC_Encoding_Letters (J) then
+ Default_WCEM := J;
+ end if;
+ end loop;
+
-- Note: the names in these files are bogus, and probably it would be
-- better for these files to have no names, but the ACVC test insist!
-- We use names that are bound to fail in open etc.
Standard_Err.Is_Text_File := True;
Standard_Err.Access_Method := 'T';
Standard_Err.Self := Standard_Err;
+ Standard_Err.WC_Method := Default_WCEM;
Standard_In.Stream := stdin;
Standard_In.Name := In_Name'Access;
Standard_In.Is_Text_File := True;
Standard_In.Access_Method := 'T';
Standard_In.Self := Standard_In;
+ Standard_In.WC_Method := Default_WCEM;
Standard_Out.Stream := stdout;
Standard_Out.Name := Out_Name'Access;
Standard_Out.Is_Text_File := True;
Standard_Out.Access_Method := 'T';
Standard_Out.Self := Standard_Out;
+ Standard_Out.WC_Method := Default_WCEM;
FIO.Chain_File (AP (Standard_In));
FIO.Chain_File (AP (Standard_Out));
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