+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- I N T E R F A C E S . C _ S T R E A M S --
--- --
--- B o d y --
--- --
--- $Revision: 1.1.16.1 $
--- --
--- Copyright (C) 1996-2001 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- --
--- 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 was originally developed by the GNAT team at New York University. --
--- Extensive contributions were provided by Ada Core Technologies Inc. --
--- --
-------------------------------------------------------------------------------
-
--- This is the default version which just calls the C versions directly
--- Note: the reason that we provide for specialization here is that on
--- some systems, notably VMS, we may need to worry about buffering.
-
-with Unchecked_Conversion;
-
-package body Interfaces.C_Streams is
-
- ------------
- -- fread --
- ------------
-
- function fread
- (buffer : voids;
- size : size_t;
- count : size_t;
- stream : FILEs)
- return size_t
- is
- function C_fread
- (buffer : voids;
- size : size_t;
- count : size_t;
- stream : FILEs)
- return size_t;
- pragma Import (C, C_fread, "fread");
-
- begin
- return C_fread (buffer, size, count, stream);
- end fread;
-
- ------------
- -- fread --
- ------------
-
- function fread
- (buffer : voids;
- index : size_t;
- size : size_t;
- count : size_t;
- stream : FILEs)
- return size_t
- is
- function C_fread
- (buffer : voids;
- size : size_t;
- count : size_t;
- stream : FILEs)
- return size_t;
- pragma Import (C, C_fread, "fread");
-
- type Byte_Buffer is array (0 .. size_t'Last / 2 - 1) of Unsigned_8;
- -- This should really be 0 .. size_t'last, but there is a problem
- -- in gigi in handling such types (introduced in GCC 3 Sep 2001)
- -- since the size in bytes of this array overflows ???
-
- type Acc_Bytes is access all Byte_Buffer;
-
- function To_Acc_Bytes is new Unchecked_Conversion (voids, Acc_Bytes);
-
- begin
- return C_fread
- (To_Acc_Bytes (buffer) (index * size)'Address, size, count, stream);
- end fread;
-
- ------------
- -- fwrite --
- ------------
-
- function fwrite
- (buffer : voids;
- size : size_t;
- count : size_t;
- stream : FILEs)
- return size_t
- is
- function C_fwrite
- (buffer : voids;
- size : size_t;
- count : size_t;
- stream : FILEs)
- return size_t;
- pragma Import (C, C_fwrite, "fwrite");
-
- begin
- return C_fwrite (buffer, size, count, stream);
- end fwrite;
-
- -------------
- -- setvbuf --
- -------------
-
- function setvbuf
- (stream : FILEs;
- buffer : chars;
- mode : int;
- size : size_t)
- return int
- is
- function C_setvbuf
- (stream : FILEs;
- buffer : chars;
- mode : int;
- size : size_t)
- return int;
- pragma Import (C, C_setvbuf, "setvbuf");
-
- begin
- return C_setvbuf (stream, buffer, mode, size);
- end setvbuf;
-
-end Interfaces.C_Streams;
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