New Language: Ada

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45955 138bc75d-0d04-0410-961f-82ee72b054a4

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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                    G N A T . S O C K E T S . T H I N                     --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--                            $Revision: 1.12 $
+--                                                                          --
+--              Copyright (C) 2001 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.Pointers;
+
+with Interfaces.C.Strings;
+with GNAT.Sockets.Constants;
+with GNAT.OS_Lib;
+
+with System;
+
+package GNAT.Sockets.Thin is
+
+   --  ??? more comments needed ???
+
+   --  This package is intended for hosts implementing BSD sockets with a
+   --  standard interface. It will be used as a default for all the platforms
+   --  that do not have a specific version of this file.
+
+   package C renames Interfaces.C;
+
+   use type C.int;
+   --  This is so we can declare the Failure constant below
+
+   Success : constant C.int :=  0;
+   Failure : constant C.int := -1;
+
+   function Socket_Errno return Integer renames GNAT.OS_Lib.Errno;
+   --  Returns last socket error number.
+
+   function Socket_Error_Message (Errno : Integer) return String;
+   --  Returns the error message string for the error number Errno. If
+   --  Errno is not known it returns "Unknown system error".
+
+   type Fd_Set is mod 2 ** 32;
+   pragma Convention (C, Fd_Set);
+
+   Null_Fd_Set : constant Fd_Set := 0;
+
+   type Fd_Set_Access is access all Fd_Set;
+   pragma Convention (C, Fd_Set_Access);
+
+   type Timeval_Unit is new C.int;
+   pragma Convention (C, Timeval_Unit);
+
+   type Timeval is record
+      Tv_Sec  : Timeval_Unit;
+      Tv_Usec : Timeval_Unit;
+   end record;
+   pragma Convention (C, Timeval);
+
+   type Timeval_Access is access all Timeval;
+   pragma Convention (C, Timeval_Access);
+
+   Immediat : constant Timeval := (0, 0);
+
+   type Int_Access is access all C.int;
+   pragma Convention (C, Int_Access);
+   --  Access to C integers
+
+   type Chars_Ptr_Array is array (C.size_t range <>) of
+     aliased C.Strings.chars_ptr;
+
+   package Chars_Ptr_Pointers is
+      new C.Pointers (C.size_t, C.Strings.chars_ptr, Chars_Ptr_Array,
+                      C.Strings.Null_Ptr);
+   --  Arrays of C (char *)
+
+   type In_Addr is record
+      S_B1, S_B2, S_B3, S_B4 : C.unsigned_char;
+   end record;
+   pragma Convention (C, In_Addr);
+   --  Internet address
+
+   type In_Addr_Access is access all In_Addr;
+   pragma Convention (C, In_Addr_Access);
+   --  Access to internet address
+
+   Inaddr_Any : aliased constant In_Addr := (others => 0);
+   --  Any internet address (all the interfaces)
+
+   type In_Addr_Access_Array is array (C.size_t range <>)
+     of aliased In_Addr_Access;
+   pragma Convention (C, In_Addr_Access_Array);
+
+   package In_Addr_Access_Pointers is
+     new C.Pointers (C.size_t, In_Addr_Access, In_Addr_Access_Array, null);
+   --  Array of internet addresses
+
+   type Sockaddr is record
+      Sa_Family : C.unsigned_short;
+      Sa_Data   : C.char_array (1 .. 14);
+   end record;
+   pragma Convention (C, Sockaddr);
+   --  Socket address
+
+   type Sockaddr_Access is access all Sockaddr;
+   pragma Convention (C, Sockaddr_Access);
+   --  Access to socket address
+
+   type Sockaddr_In is record
+      Sin_Family : C.unsigned_short      := Constants.AF_INET;
+      Sin_Port   : C.unsigned_short      := 0;
+      Sin_Addr   : In_Addr               := Inaddr_Any;
+      Sin_Zero   : C.char_array (1 .. 8) := (others => C.char'Val (0));
+   end record;
+   pragma Convention (C, Sockaddr_In);
+   --  Internet socket address
+
+   type Sockaddr_In_Access is access all Sockaddr_In;
+   pragma Convention (C, Sockaddr_In_Access);
+   --  Access to internet socket address
+
+   type Hostent is record
+      H_Name      : C.Strings.chars_ptr;
+      H_Aliases   : Chars_Ptr_Pointers.Pointer;
+      H_Addrtype  : C.int;
+      H_Length    : C.int;
+      H_Addr_List : In_Addr_Access_Pointers.Pointer;
+   end record;
+   pragma Convention (C, Hostent);
+   --  Host entry
+
+   type Hostent_Access is access all Hostent;
+   pragma Convention (C, Hostent_Access);
+   --  Access to host entry
+
+   type Two_Int is array (0 .. 1) of C.int;
+   pragma Convention (C, Two_Int);
+   --  Used with pipe()
+
+   function C_Accept
+     (S       : C.int;
+      Addr    : System.Address;
+      Addrlen : access C.int)
+      return    C.int;
+
+   function C_Bind
+     (S       : C.int;
+      Name    : System.Address;
+      Namelen : C.int)
+      return    C.int;
+
+   function C_Close
+     (Fd   : C.int)
+      return C.int;
+
+   function C_Connect
+     (S       : C.int;
+      Name    : System.Address;
+      Namelen : C.int)
+      return    C.int;
+
+   function C_Gethostbyaddr
+     (Addr : System.Address;
+      Len  : C.int;
+      Typ  : C.int)
+      return Hostent_Access;
+
+   function C_Gethostbyname
+     (Name : C.char_array)
+      return Hostent_Access;
+
+   function C_Gethostname
+     (Name    : System.Address;
+      Namelen : C.int)
+      return    C.int;
+
+   function C_Getpeername
+     (S       : C.int;
+      Name    : System.Address;
+      Namelen : access C.int)
+      return    C.int;
+
+   function C_Getsockname
+     (S       : C.int;
+      Name    : System.Address;
+      Namelen : access C.int)
+      return    C.int;
+
+   function C_Getsockopt
+     (S       : C.int;
+      Level   : C.int;
+      Optname : C.int;
+      Optval  : System.Address;
+      Optlen  : access C.int)
+      return    C.int;
+
+   function C_Inet_Addr
+     (Cp   : C.Strings.chars_ptr)
+      return C.int;
+
+   function C_Ioctl
+     (S    : C.int;
+      Req  : C.int;
+      Arg  : Int_Access)
+      return C.int;
+
+   function C_Listen (S, Backlog : C.int) return C.int;
+
+   function C_Read
+     (Fd    : C.int;
+      Buf   : System.Address;
+      Count : C.int)
+      return  C.int;
+
+   function C_Recv
+     (S     : C.int;
+      Msg   : System.Address;
+      Len   : C.int;
+      Flags : C.int)
+      return  C.int;
+
+   function C_Recvfrom
+     (S       : C.int;
+      Msg     : System.Address;
+      Len     : C.int;
+      Flags   : C.int;
+      From    : Sockaddr_In_Access;
+      Fromlen : access C.int)
+      return    C.int;
+
+   function C_Select
+     (Nfds      : C.int;
+      Readfds   : Fd_Set_Access;
+      Writefds  : Fd_Set_Access;
+      Exceptfds : Fd_Set_Access;
+      Timeout   : Timeval_Access)
+      return      C.int;
+
+   function C_Send
+     (S     : C.int;
+      Msg   : System.Address;
+      Len   : C.int;
+      Flags : C.int)
+      return  C.int;
+
+   function C_Sendto
+     (S     : C.int;
+      Msg   : System.Address;
+      Len   : C.int;
+      Flags : C.int;
+      To    : Sockaddr_In_Access;
+      Tolen : C.int)
+      return  C.int;
+
+   function C_Setsockopt
+     (S       : C.int;
+      Level   : C.int;
+      Optname : C.int;
+      Optval  : System.Address;
+      Optlen  : C.int)
+      return    C.int;
+
+   function C_Shutdown
+     (S    : C.int;
+      How  : C.int)
+      return C.int;
+
+   function C_Socket
+     (Domain   : C.int;
+      Typ      : C.int;
+      Protocol : C.int)
+      return     C.int;
+
+   function C_Strerror
+     (Errnum : C.int)
+      return   C.Strings.chars_ptr;
+
+   function C_System
+     (Command : System.Address)
+      return    C.int;
+
+   function C_Write
+     (Fd    : C.int;
+      Buf   : System.Address;
+      Count : C.int)
+      return  C.int;
+
+   --  Return highest numbered socket (what does this refer to???)
+
+   procedure Clear    (Item : in out Fd_Set; Socket : in C.int);
+   procedure Empty    (Item : in out Fd_Set);
+   function  Is_Empty (Item : Fd_Set) return Boolean;
+   function  Is_Set   (Item : Fd_Set; Socket : C.int) return Boolean;
+   function  Max      (Item : Fd_Set) return C.int;
+   procedure Set      (Item : in out Fd_Set; Socket : in C.int);
+
+   procedure Finalize;
+   procedure Initialize (Process_Blocking_IO : Boolean);
+
+private
+
+   pragma Import (C, C_Bind, "bind");
+   pragma Import (C, C_Close, "close");
+   pragma Import (C, C_Gethostbyaddr, "gethostbyaddr");
+   pragma Import (C, C_Gethostbyname, "gethostbyname");
+   pragma Import (C, C_Gethostname, "gethostname");
+   pragma Import (C, C_Getpeername, "getpeername");
+   pragma Import (C, C_Getsockname, "getsockname");
+   pragma Import (C, C_Getsockopt, "getsockopt");
+   pragma Import (C, C_Inet_Addr, "inet_addr");
+   pragma Import (C, C_Listen, "listen");
+   pragma Import (C, C_Read, "read");
+   pragma Import (C, C_Select, "select");
+   pragma Import (C, C_Setsockopt, "setsockopt");
+   pragma Import (C, C_Shutdown, "shutdown");
+   pragma Import (C, C_Strerror, "strerror");
+   pragma Import (C, C_System, "system");
+   pragma Import (C, C_Write, "write");
+
+end GNAT.Sockets.Thin;