+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNAT RUNTIME COMPONENTS --
--- --
--- G N A T . I O _ A U X --
--- --
--- B o d y --
--- --
--- $Revision: 1.1 $
--- --
--- Copyright (C) 1995-2000 Ada Core Technologies, 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- --
--- 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, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
--- --
--- 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. --
--- --
--- GNAT is maintained by Ada Core Technologies Inc (http://www.gnat.com). --
--- --
-------------------------------------------------------------------------------
-
-with Interfaces.C_Streams; use Interfaces.C_Streams;
-
-package body GNAT.IO_Aux is
-
- Buflen : constant := 2000;
- -- Buffer length. Works for any non-zero value, larger values take
- -- more stack space, smaller values require more recursion.
-
- -----------------
- -- File_Exists --
- -----------------
-
- function File_Exists (Name : String) return Boolean
- is
- Namestr : aliased String (1 .. Name'Length + 1);
- -- Name as given with ASCII.NUL appended
-
- begin
- Namestr (1 .. Name'Length) := Name;
- Namestr (Name'Length + 1) := ASCII.NUL;
- return file_exists (Namestr'Address) /= 0;
- end File_Exists;
-
- --------------
- -- Get_Line --
- --------------
-
- -- Current_Input case
-
- function Get_Line return String is
- Buffer : String (1 .. Buflen);
- -- Buffer to read in chunks of remaining line. Will work with any
- -- size buffer. We choose a length so that most of the time no
- -- recursion will be required.
-
- Last : Natural;
-
- begin
- Ada.Text_IO.Get_Line (Buffer, Last);
-
- -- If the buffer is not full, then we are all done
-
- if Last < Buffer'Last then
- return Buffer (1 .. Last);
-
- -- Otherwise, we still have characters left on the line. Note that
- -- as specified by (RM A.10.7(19)) the end of line is not skipped
- -- in this case, even if we are right at it now.
-
- else
- return Buffer & GNAT.IO_Aux.Get_Line;
- end if;
- end Get_Line;
-
- -- Case of reading from a specified file. Note that we could certainly
- -- share code between these two versions, but these are very short
- -- routines, and we may as well aim for maximum speed, cutting out an
- -- intermediate call (calls returning string may be somewhat slow)
-
- function Get_Line (File : Ada.Text_IO.File_Type) return String is
- Buffer : String (1 .. Buflen);
- Last : Natural;
-
- begin
- Ada.Text_IO.Get_Line (File, Buffer, Last);
-
- if Last < Buffer'Last then
- return Buffer (1 .. Last);
- else
- return Buffer & Get_Line (File);
- end if;
- end Get_Line;
-
-end GNAT.IO_Aux;
projects / msp430-gcc.git / blobdiff