From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- gcc/ada/a-textio.ads | 472 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 472 insertions(+) create mode 100644 gcc/ada/a-textio.ads (limited to 'gcc/ada/a-textio.ads') diff --git a/gcc/ada/a-textio.ads b/gcc/ada/a-textio.ads new file mode 100644 index 000000000..d22b2f9c6 --- /dev/null +++ b/gcc/ada/a-textio.ads @@ -0,0 +1,472 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- A D A . T E X T _ I O -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 1992-2009, Free Software Foundation, Inc. -- +-- -- +-- This specification is derived from the Ada Reference Manual for use with -- +-- GNAT. The copyright notice above, and the license provisions that follow -- +-- apply solely to the contents of the part following the private keyword. -- +-- -- +-- 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 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. -- +-- -- +-- 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 -- +-- . -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- Note: the generic subpackages of Text_IO (Integer_IO, Float_IO, Fixed_IO, +-- Modular_IO, Decimal_IO and Enumeration_IO) appear as private children in +-- GNAT. These children are with'ed automatically if they are referenced, so +-- this rearrangement is invisible to user programs, but has the advantage +-- that only the needed parts of Text_IO are processed and loaded. + +with Ada.IO_Exceptions; +with Ada.Streams; + +with System; +with System.File_Control_Block; +with System.WCh_Con; + +package Ada.Text_IO is + pragma Elaborate_Body; + + type File_Type is limited private; + type File_Mode is (In_File, Out_File, Append_File); + + -- The following representation clause allows the use of unchecked + -- conversion for rapid translation between the File_Mode type + -- used in this package and System.File_IO. + + for File_Mode use + (In_File => 0, -- System.FIle_IO.File_Mode'Pos (In_File) + Out_File => 2, -- System.File_IO.File_Mode'Pos (Out_File) + Append_File => 3); -- System.File_IO.File_Mode'Pos (Append_File) + + type Count is range 0 .. Natural'Last; + -- The value of Count'Last must be large enough so that the assumption + -- enough so that the assumption that the Line, Column and Page + -- counts can never exceed this value is a valid assumption. + + subtype Positive_Count is Count range 1 .. Count'Last; + + Unbounded : constant Count := 0; + -- Line and page length + + subtype Field is Integer range 0 .. 255; + -- Note: if for any reason, there is a need to increase this value, + -- then it will be necessary to change the corresponding value in + -- System.Img_Real in file s-imgrea.adb. + + subtype Number_Base is Integer range 2 .. 16; + + type Type_Set is (Lower_Case, Upper_Case); + + --------------------- + -- File Management -- + --------------------- + + procedure Create + (File : in out File_Type; + Mode : File_Mode := Out_File; + Name : String := ""; + Form : String := ""); + + procedure Open + (File : in out File_Type; + Mode : File_Mode; + Name : String; + Form : String := ""); + + procedure Close (File : in out File_Type); + procedure Delete (File : in out File_Type); + procedure Reset (File : in out File_Type; Mode : File_Mode); + procedure Reset (File : in out File_Type); + + function Mode (File : File_Type) return File_Mode; + function Name (File : File_Type) return String; + function Form (File : File_Type) return String; + + function Is_Open (File : File_Type) return Boolean; + + ------------------------------------------------------ + -- Control of default input, output and error files -- + ------------------------------------------------------ + + procedure Set_Input (File : File_Type); + procedure Set_Output (File : File_Type); + procedure Set_Error (File : File_Type); + + function Standard_Input return File_Type; + function Standard_Output return File_Type; + function Standard_Error return File_Type; + + function Current_Input return File_Type; + function Current_Output return File_Type; + function Current_Error return File_Type; + + type File_Access is access constant File_Type; + + function Standard_Input return File_Access; + function Standard_Output return File_Access; + function Standard_Error return File_Access; + + function Current_Input return File_Access; + function Current_Output return File_Access; + function Current_Error return File_Access; + + -------------------- + -- Buffer control -- + -------------------- + + -- Note: The parameter file is IN OUT in the RM, but this is clearly + -- an oversight, and was intended to be IN, see AI95-00057. + + procedure Flush (File : File_Type); + procedure Flush; + + -------------------------------------------- + -- Specification of line and page lengths -- + -------------------------------------------- + + procedure Set_Line_Length (File : File_Type; To : Count); + procedure Set_Line_Length (To : Count); + + procedure Set_Page_Length (File : File_Type; To : Count); + procedure Set_Page_Length (To : Count); + + function Line_Length (File : File_Type) return Count; + function Line_Length return Count; + + function Page_Length (File : File_Type) return Count; + function Page_Length return Count; + + ------------------------------------ + -- Column, Line, and Page Control -- + ------------------------------------ + + procedure New_Line (File : File_Type; Spacing : Positive_Count := 1); + procedure New_Line (Spacing : Positive_Count := 1); + + procedure Skip_Line (File : File_Type; Spacing : Positive_Count := 1); + procedure Skip_Line (Spacing : Positive_Count := 1); + + function End_Of_Line (File : File_Type) return Boolean; + function End_Of_Line return Boolean; + + procedure New_Page (File : File_Type); + procedure New_Page; + + procedure Skip_Page (File : File_Type); + procedure Skip_Page; + + function End_Of_Page (File : File_Type) return Boolean; + function End_Of_Page return Boolean; + + function End_Of_File (File : File_Type) return Boolean; + function End_Of_File return Boolean; + + procedure Set_Col (File : File_Type; To : Positive_Count); + procedure Set_Col (To : Positive_Count); + + procedure Set_Line (File : File_Type; To : Positive_Count); + procedure Set_Line (To : Positive_Count); + + function Col (File : File_Type) return Positive_Count; + function Col return Positive_Count; + + function Line (File : File_Type) return Positive_Count; + function Line return Positive_Count; + + function Page (File : File_Type) return Positive_Count; + function Page return Positive_Count; + + ---------------------------- + -- Character Input-Output -- + ---------------------------- + + procedure Get (File : File_Type; Item : out Character); + procedure Get (Item : out Character); + procedure Put (File : File_Type; Item : Character); + procedure Put (Item : Character); + + procedure Look_Ahead + (File : File_Type; + Item : out Character; + End_Of_Line : out Boolean); + + procedure Look_Ahead + (Item : out Character; + End_Of_Line : out Boolean); + + procedure Get_Immediate + (File : File_Type; + Item : out Character); + + procedure Get_Immediate + (Item : out Character); + + procedure Get_Immediate + (File : File_Type; + Item : out Character; + Available : out Boolean); + + procedure Get_Immediate + (Item : out Character; + Available : out Boolean); + + ------------------------- + -- String Input-Output -- + ------------------------- + + procedure Get (File : File_Type; Item : out String); + procedure Get (Item : out String); + procedure Put (File : File_Type; Item : String); + procedure Put (Item : String); + + procedure Get_Line + (File : File_Type; + Item : out String; + Last : out Natural); + + procedure Get_Line + (Item : out String; + Last : out Natural); + + function Get_Line (File : File_Type) return String; + pragma Ada_05 (Get_Line); + + function Get_Line return String; + pragma Ada_05 (Get_Line); + + procedure Put_Line + (File : File_Type; + Item : String); + + procedure Put_Line + (Item : String); + + --------------------------------------- + -- Generic packages for Input-Output -- + --------------------------------------- + + -- The generic packages: + + -- Ada.Text_IO.Integer_IO + -- Ada.Text_IO.Modular_IO + -- Ada.Text_IO.Float_IO + -- Ada.Text_IO.Fixed_IO + -- Ada.Text_IO.Decimal_IO + -- Ada.Text_IO.Enumeration_IO + + -- are implemented as separate child packages in GNAT, so the + -- spec and body of these packages are to be found in separate + -- child units. This implementation detail is hidden from the + -- Ada programmer by special circuitry in the compiler that + -- treats these child packages as though they were nested in + -- Text_IO. The advantage of this special processing is that + -- the subsidiary routines needed if these generics are used + -- are not loaded when they are not used. + + ---------------- + -- Exceptions -- + ---------------- + + Status_Error : exception renames IO_Exceptions.Status_Error; + Mode_Error : exception renames IO_Exceptions.Mode_Error; + Name_Error : exception renames IO_Exceptions.Name_Error; + Use_Error : exception renames IO_Exceptions.Use_Error; + Device_Error : exception renames IO_Exceptions.Device_Error; + End_Error : exception renames IO_Exceptions.End_Error; + Data_Error : exception renames IO_Exceptions.Data_Error; + Layout_Error : exception renames IO_Exceptions.Layout_Error; + +private + + -- The following procedures have a File_Type formal of mode IN OUT because + -- they may close the original file. The Close operation may raise an + -- exception, but in that case we want any assignment to the formal to + -- be effective anyway, so it must be passed by reference (or the caller + -- will be left with a dangling pointer). + + pragma Export_Procedure + (Internal => Close, + External => "", + Mechanism => Reference); + pragma Export_Procedure + (Internal => Delete, + External => "", + Mechanism => Reference); + pragma Export_Procedure + (Internal => Reset, + External => "", + Parameter_Types => (File_Type), + Mechanism => Reference); + pragma Export_Procedure + (Internal => Reset, + External => "", + Parameter_Types => (File_Type, File_Mode), + Mechanism => (File => Reference)); + + ----------------------------------- + -- Handling of Format Characters -- + ----------------------------------- + + -- Line marks are represented by the single character ASCII.LF (16#0A#). + -- In DOS and similar systems, underlying file translation takes care + -- of translating this to and from the standard CR/LF sequences used in + -- these operating systems to mark the end of a line. On output there is + -- always a line mark at the end of the last line, but on input, this + -- line mark can be omitted, and is implied by the end of file. + + -- Page marks are represented by the single character ASCII.FF (16#0C#), + -- The page mark at the end of the file may be omitted, and is normally + -- omitted on output unless an explicit New_Page call is made before + -- closing the file. No page mark is added when a file is appended to, + -- so, in accordance with the permission in (RM A.10.2(4)), there may + -- or may not be a page mark separating preexisting text in the file + -- from the new text to be written. + + -- A file mark is marked by the physical end of file. In DOS translation + -- mode on input, an EOF character (SUB = 16#1A#) gets translated to the + -- physical end of file, so in effect this character is recognized as + -- marking the end of file in DOS and similar systems. + + LM : constant := Character'Pos (ASCII.LF); + -- Used as line mark + + PM : constant := Character'Pos (ASCII.FF); + -- Used as page mark, except at end of file where it is implied + + -------------------------------- + -- Text_IO File Control Block -- + -------------------------------- + + Default_WCEM : System.WCh_Con.WC_Encoding_Method := + System.WCh_Con.WCEM_UTF8; + -- This gets modified during initialization (see body) using + -- the default value established in the call to Set_Globals. + + package FCB renames System.File_Control_Block; + + type Text_AFCB; + type File_Type is access all Text_AFCB; + + type Text_AFCB is new FCB.AFCB with record + Page : Count := 1; + Line : Count := 1; + Col : Count := 1; + Line_Length : Count := 0; + Page_Length : Count := 0; + + Self : aliased File_Type; + -- Set to point to the containing Text_AFCB block. This is used to + -- implement the Current_{Error,Input,Output} functions which return + -- a File_Access, the file access value returned is a pointer to + -- the Self field of the corresponding file. + + Before_LM : Boolean := False; + -- This flag is used to deal with the anomalies introduced by the + -- peculiar definition of End_Of_File and End_Of_Page in Ada. These + -- functions require looking ahead more than one character. Since + -- there is no convenient way of backing up more than one character, + -- what we do is to leave ourselves positioned past the LM, but set + -- this flag, so that we know that from an Ada point of view we are + -- in front of the LM, not after it. A bit of a kludge, but it works! + + Before_LM_PM : Boolean := False; + -- This flag similarly handles the case of being physically positioned + -- after a LM-PM sequence when logically we are before the LM-PM. This + -- flag can only be set if Before_LM is also set. + + WC_Method : System.WCh_Con.WC_Encoding_Method := Default_WCEM; + -- Encoding method to be used for this file. Text_IO does not deal with + -- wide characters, but it does deal with upper half characters in the + -- range 16#80#-16#FF# which may need encoding, e.g. in UTF-8 mode. + + Before_Upper_Half_Character : Boolean := False; + -- This flag is set to indicate that an encoded upper half character has + -- been read by Text_IO.Look_Ahead. If it is set to True, then it means + -- that the stream is logically positioned before the character but is + -- physically positioned after it. The character involved must be in + -- the range 16#80#-16#FF#, i.e. if the flag is set, then we know the + -- next character has a code greater than 16#7F#, and the value of this + -- character is saved in Saved_Upper_Half_Character. + + Saved_Upper_Half_Character : Character; + -- This field is valid only if Before_Upper_Half_Character is set. It + -- contains an upper-half character read by Look_Ahead. If Look_Ahead + -- reads a character in the range 16#00# to 16#7F#, then it can use + -- ungetc to put it back, but ungetc cannot be called more than once, + -- so for characters above this range, we don't try to back up the + -- file. Instead we save the character in this field and set the flag + -- Before_Upper_Half_Character to True to indicate that we are logically + -- positioned before this character even though the stream is physically + -- positioned after it. + + end record; + + function AFCB_Allocate (Control_Block : Text_AFCB) return FCB.AFCB_Ptr; + + procedure AFCB_Close (File : not null access Text_AFCB); + procedure AFCB_Free (File : not null access Text_AFCB); + + procedure Read + (File : in out Text_AFCB; + Item : out Ada.Streams.Stream_Element_Array; + Last : out Ada.Streams.Stream_Element_Offset); + -- Read operation used when Text_IO file is treated directly as Stream + + procedure Write + (File : in out Text_AFCB; + Item : Ada.Streams.Stream_Element_Array); + -- Write operation used when Text_IO file is treated directly as Stream + + ------------------------ + -- The Standard Files -- + ------------------------ + + Standard_In_AFCB : aliased Text_AFCB; + Standard_Out_AFCB : aliased Text_AFCB; + Standard_Err_AFCB : aliased Text_AFCB; + + Standard_In : aliased File_Type := Standard_In_AFCB'Access; + Standard_Out : aliased File_Type := Standard_Out_AFCB'Access; + Standard_Err : aliased File_Type := Standard_Err_AFCB'Access; + -- Standard files + + Current_In : aliased File_Type := Standard_In; + Current_Out : aliased File_Type := Standard_Out; + Current_Err : aliased File_Type := Standard_Err; + -- Current files + + function EOF_Char return Integer; + -- Returns the system-specific character indicating the end of a text file. + -- This is exported for use by child packages such as Enumeration_Aux to + -- eliminate their needing to depend directly on Interfaces.C_Streams, + -- which is not available in certain target environments (such as AAMP). + + procedure Initialize_Standard_Files; + -- Initializes the file control blocks for the standard files. Called from + -- the elaboration routine for this package, and from Reset_Standard_Files + -- in package Ada.Text_IO.Reset_Standard_Files. + +end Ada.Text_IO; -- cgit v1.2.3