-- --
-- B o d y --
-- --
--- Copyright (C) 1992-2008, Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2010, 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 Ada.Streams; use Ada.Streams;
+with Interfaces.C_Streams; use Interfaces.C_Streams;
with System.File_IO;
with System.CRTL;
-with System.WCh_Cnv; use System.WCh_Cnv;
-with System.WCh_Con; use System.WCh_Con;
+with System.WCh_Cnv; use System.WCh_Cnv;
+with System.WCh_Con; use System.WCh_Con;
with Ada.Unchecked_Conversion;
with Ada.Unchecked_Deallocation;
WC_Encoding : Character;
pragma Import (C, WC_Encoding, "__gl_wc_encoding");
+ -- Default wide character encoding
+
+ Err_Name : aliased String := "*stderr" & ASCII.NUL;
+ In_Name : aliased String := "*stdin" & ASCII.NUL;
+ Out_Name : aliased String := "*stdout" & ASCII.NUL;
+ -- Names of standard files
+ --
+ -- Use "preallocated" strings to avoid calling "new" during the elaboration
+ -- of the run time. This is needed in the tasking case to avoid calling
+ -- Task_Lock too early. A filename is expected to end with a null character
+ -- in the runtime, here the null characters are added just to have a
+ -- correct filename length.
+ --
+ -- Note: the names for these files are bogus, and probably it would be
+ -- better for these files to have no names, but the ACVC tests insist!
+ -- We use names that are bound to fail in open etc.
+
+ Null_Str : aliased constant String := "";
+ -- Used as form string for standard files
-----------------------
-- 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 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 Getc (File : File_Type) return int;
+ -- Gets next character from file, which has already been checked for being
+ -- in read status, and returns the character read if no error occurs. The
+ -- result is EOF if the end of file was read.
+
+ 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 Has_Upper_Half_Character (Item : String) return Boolean;
-- Returns True if any of the characters is in the range 16#80#-16#FF#
+ function Nextc (File : File_Type) return int;
+ -- Returns next character from file without skipping past it (i.e. it is a
+ -- combination of Getc followed by an Ungetc).
+
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 Putc (ch : int; File : File_Type);
+ -- Outputs the given character to the file, which has already been checked
+ -- for being in output status. Device_Error is raised if the character
+ -- cannot be written.
+
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.
+ procedure Terminate_Line (File : File_Type);
+ -- If the file is in Write_File or Append_File mode, and the current line
+ -- is not terminated, then a line terminator is written using New_Line.
+ -- Note that there is no Terminate_Page routine, because the page mark at
+ -- the end of the file is implied if necessary.
+
+ procedure Ungetc (ch : int; File : File_Type);
+ -- Pushes back character into stream, using ungetc. The caller has checked
+ -- that the file is in read status. Device_Error is raised if the character
+ -- cannot be pushed back. An attempt to push back and end of file character
+ -- (EOF) is ignored.
+
-------------------
-- AFCB_Allocate --
-------------------
procedure Close (File : in out File_Type) is
begin
- FIO.Close (AP (File));
+ FIO.Close (AP (File)'Unrestricted_Access);
end Close;
---------
procedure Delete (File : in out File_Type) is
begin
- FIO.Delete (AP (File));
+ FIO.Delete (AP (File)'Unrestricted_Access);
end Delete;
-----------------
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;
+ Item :=
+ (if not Is_Start_Of_Encoding (Character'Val (ch), File.WC_Method)
+ then Character'Val (ch)
+ else Get_Upper_Half_Char_Immed (Character'Val (ch), File));
end if;
end if;
end Get_Immediate;
else
Available := True;
- 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;
+ Item :=
+ (if Is_Start_Of_Encoding (Character'Val (ch), File.WC_Method)
+ then Character'Val (ch)
+ else Get_Upper_Half_Char_Immed (Character'Val (ch), File));
end if;
end if;
procedure Get_Line
(File : File_Type;
Item : out String;
- Last : out Natural)
- is
- ch : int;
-
- begin
- FIO.Check_Read_Status (AP (File));
- Last := Item'First - 1;
-
- -- Immediate exit for null string, this is a case in which we do not
- -- need to test for end of file and we do not skip a line mark under
- -- any circumstances.
-
- if Last >= Item'Last then
- return;
- end if;
-
- -- Here we have at least one character, if we are immediately before
- -- a line mark, then we will just skip past it storing no characters.
-
- if File.Before_LM then
- File.Before_LM := False;
- File.Before_LM_PM := False;
-
- -- Otherwise we need to read some characters
-
- else
- ch := Getc (File);
-
- -- If we are at the end of file now, it means we are trying to
- -- skip a file terminator and we raise End_Error (RM A.10.7(20))
-
- if ch = EOF then
- raise End_Error;
- end if;
-
- -- Loop through characters. Don't bother if we hit a page mark,
- -- since in normal files, page marks can only follow line marks
- -- in any case and we only promise to treat the page nonsense
- -- correctly in the absense of such rogue page marks.
-
- loop
- -- Exit the loop if read is terminated by encountering line mark
-
- exit when ch = LM;
-
- -- Otherwise store the character, note that we know that ch is
- -- something other than LM or EOF. It could possibly be a page
- -- mark if there is a stray page mark in the middle of a line,
- -- but this is not an official page mark in any case, since
- -- official page marks can only follow a line mark. The whole
- -- page business is pretty much nonsense anyway, so we do not
- -- want to waste time trying to make sense out of non-standard
- -- page marks in the file! This means that the behavior of
- -- Get_Line is different from repeated Get of a character, but
- -- that's too bad. We only promise that page numbers etc make
- -- sense if the file is formatted in a standard manner.
-
- -- Note: we do not adjust the column number because it is quicker
- -- to adjust it once at the end of the operation than incrementing
- -- it each time around the loop.
-
- Last := Last + 1;
- Item (Last) := Character'Val (ch);
-
- -- All done if the string is full, this is the case in which
- -- we do not skip the following line mark. We need to adjust
- -- the column number in this case.
-
- if Last = Item'Last then
- File.Col := File.Col + Count (Item'Length);
- return;
- end if;
-
- -- Otherwise read next character. We also exit from the loop if
- -- we read an end of file. This is the case where the last line
- -- is not terminated with a line mark, and we consider that there
- -- is an implied line mark in this case (this is a non-standard
- -- file, but it is nice to treat it reasonably).
-
- ch := Getc (File);
- exit when ch = EOF;
- end loop;
- end if;
-
- -- We have skipped past, but not stored, a line mark. Skip following
- -- page mark if one follows, but do not do this for a non-regular
- -- file (since otherwise we get annoying wait for an extra character)
-
- File.Line := File.Line + 1;
- File.Col := 1;
-
- if File.Before_LM_PM then
- File.Line := 1;
- File.Before_LM_PM := False;
- File.Page := File.Page + 1;
-
- elsif File.Is_Regular_File then
- ch := Getc (File);
-
- if ch = PM and then File.Is_Regular_File then
- File.Line := 1;
- File.Page := File.Page + 1;
- else
- Ungetc (ch, File);
- end if;
- end if;
- end Get_Line;
+ Last : out Natural) is separate;
+ -- The implementation of Ada.Text_IO.Get_Line is split into a subunit so
+ -- that different implementations can be used on different systems. In
+ -- particular the standard implementation uses low level stuff that is
+ -- not appropriate for the JVM and .NET implementations.
procedure Get_Line
(Item : out String;
return False;
end Has_Upper_Half_Character;
+ -------------------------------
+ -- Initialize_Standard_Files --
+ -------------------------------
+
+ procedure Initialize_Standard_Files is
+ begin
+ Standard_Err.Stream := stderr;
+ Standard_Err.Name := Err_Name'Access;
+ Standard_Err.Form := Null_Str'Unrestricted_Access;
+ Standard_Err.Mode := FCB.Out_File;
+ Standard_Err.Is_Regular_File := is_regular_file (fileno (stderr)) /= 0;
+ Standard_Err.Is_Temporary_File := False;
+ Standard_Err.Is_System_File := True;
+ 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.Form := Null_Str'Unrestricted_Access;
+ Standard_In.Mode := FCB.In_File;
+ Standard_In.Is_Regular_File := is_regular_file (fileno (stdin)) /= 0;
+ Standard_In.Is_Temporary_File := False;
+ Standard_In.Is_System_File := True;
+ 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.Form := Null_Str'Unrestricted_Access;
+ Standard_Out.Mode := FCB.Out_File;
+ Standard_Out.Is_Regular_File := is_regular_file (fileno (stdout)) /= 0;
+ Standard_Out.Is_Temporary_File := False;
+ Standard_Out.Is_System_File := True;
+ Standard_Out.Is_Text_File := True;
+ Standard_Out.Access_Method := 'T';
+ Standard_Out.Self := Standard_Out;
+ Standard_Out.WC_Method := Default_WCEM;
+
+ FIO.Make_Unbuffered (AP (Standard_Out));
+ FIO.Make_Unbuffered (AP (Standard_Err));
+ end Initialize_Standard_Files;
+
-------------
-- Is_Open --
-------------
begin
-- Don't allow change of mode for current file (RM A.10.2(5))
- if (File = Current_In or else
- File = Current_Out or else
+ if (File = Current_In or else
+ File = Current_Out or else
File = Current_Error)
and then To_FCB (Mode) /= File.Mode
then
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;
if Start = 0 then
File.WC_Method := WCEM_Brackets;
- elsif Start /= 0 then
+ else
if Stop = Start then
for J in WC_Encoding_Letters'Range loop
if File.Form (Start) = WC_Encoding_Letters (J) then
-- up for such files, so we assume an implicit LM in this case.
loop
- exit when ch = LM or ch = EOF;
+ exit when ch = LM or else ch = EOF;
ch := Getc (File);
end loop;
end if;
end if;
end Write;
- -- Use "preallocated" strings to avoid calling "new" during the
- -- elaboration of the run time. This is needed in the tasking case to
- -- avoid calling Task_Lock too early. A filename is expected to end with a
- -- 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;
-
begin
- -------------------------------
- -- Initialize Standard Files --
- -------------------------------
+ -- Initialize Standard Files
for J in WC_Encoding_Method loop
if WC_Encoding = WC_Encoding_Letters (J) then
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.Stream := stderr;
- Standard_Err.Name := Err_Name'Access;
- Standard_Err.Form := Null_Str'Unrestricted_Access;
- Standard_Err.Mode := FCB.Out_File;
- Standard_Err.Is_Regular_File := is_regular_file (fileno (stderr)) /= 0;
- Standard_Err.Is_Temporary_File := False;
- Standard_Err.Is_System_File := True;
- 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.Form := Null_Str'Unrestricted_Access;
- Standard_In.Mode := FCB.In_File;
- Standard_In.Is_Regular_File := is_regular_file (fileno (stdin)) /= 0;
- Standard_In.Is_Temporary_File := False;
- Standard_In.Is_System_File := True;
- 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.Form := Null_Str'Unrestricted_Access;
- Standard_Out.Mode := FCB.Out_File;
- Standard_Out.Is_Regular_File := is_regular_file (fileno (stdout)) /= 0;
- Standard_Out.Is_Temporary_File := False;
- Standard_Out.Is_System_File := True;
- Standard_Out.Is_Text_File := True;
- Standard_Out.Access_Method := 'T';
- Standard_Out.Self := Standard_Out;
- Standard_Out.WC_Method := Default_WCEM;
+ Initialize_Standard_Files;
FIO.Chain_File (AP (Standard_In));
FIO.Chain_File (AP (Standard_Out));
FIO.Chain_File (AP (Standard_Err));
- FIO.Make_Unbuffered (AP (Standard_Out));
- FIO.Make_Unbuffered (AP (Standard_Err));
-
end Ada.Text_IO;
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