New file.

From-SVN: r135709

gcc/ada/ChangeLog

+2008-05-21  Thomas Quinot  <quinot@adacore.com>
+
+	* g-sothco.ads, g-sothco.adb: New files.
+
 2008-05-20  Thomas Quinot  <quinot@adacore.com>
 
 	* Makefile.rtl (GNAT.Sockets.Thin_Common): New unit.

gcc/ada/g-sothco.adb

+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--              G N A T . S O C K E T S . T H I N _ C O M M O N             --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--                       Copyright (C) 2008, AdaCore                        --
+--                                                                          --
+-- 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,  51  Franklin  Street,  Fifth  Floor, --
+-- Boston, MA 02110-1301, 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+package body GNAT.Sockets.Thin_Common is
+
+   -----------------
+   -- Set_Address --
+   -----------------
+
+   procedure Set_Address
+     (Sin     : Sockaddr_In_Access;
+      Address : In_Addr)
+   is
+   begin
+      Sin.Sin_Addr := Address;
+   end Set_Address;
+
+   ----------------
+   -- Set_Family --
+   ----------------
+
+   procedure Set_Family
+     (Length_And_Family : out Sockaddr_Length_And_Family;
+      Family            : Family_Type)
+   is
+      C_Family : C.int renames Families (Family);
+      Has_Sockaddr_Len : constant Boolean := Constants.Has_Sockaddr_Len /= 0;
+   begin
+      if Has_Sockaddr_Len then
+         Length_And_Family.Length       := Lengths (Family);
+         Length_And_Family.Char_Family  := C.unsigned_char  (C_Family);
+      else
+         Length_And_Family.Short_Family := C.unsigned_short (C_Family);
+      end if;
+   end Set_Family;
+
+   --------------
+   -- Set_Port --
+   --------------
+
+   procedure Set_Port
+     (Sin  : Sockaddr_In_Access;
+      Port : C.unsigned_short)
+   is
+   begin
+      Sin.Sin_Port := Port;
+   end Set_Port;
+
+end GNAT.Sockets.Thin_Common;

gcc/ada/g-sothco.ads

+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--              G N A T . S O C K E T S . T H I N _ C O M M O N             --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--                       Copyright (C) 2008, AdaCore                        --
+--                                                                          --
+-- 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,  51  Franklin  Street,  Fifth  Floor, --
+-- Boston, MA 02110-1301, 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 target-independent part of the thin sockets mapping.
+--  This package should not be directly with'ed by an applications program.
+
+with Ada.Unchecked_Conversion;
+
+with Interfaces.C;
+with Interfaces.C.Pointers;
+with Interfaces.C.Strings;
+
+with GNAT.Sockets.Constants;
+
+package GNAT.Sockets.Thin_Common is
+
+   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;
+
+   type time_t is
+     range -2 ** (8 * Constants.SIZEOF_tv_sec - 1)
+         .. 2 ** (8 * Constants.SIZEOF_tv_sec - 1) - 1;
+   for time_t'Size use 8 * Constants.SIZEOF_tv_sec;
+   pragma Convention (C, time_t);
+
+   type suseconds_t is
+     range -2 ** (8 * Constants.SIZEOF_tv_usec - 1)
+         .. 2 ** (8 * Constants.SIZEOF_tv_usec - 1) - 1;
+   for suseconds_t'Size use 8 * Constants.SIZEOF_tv_usec;
+   pragma Convention (C, suseconds_t);
+
+   type Timeval is record
+      Tv_Sec  : time_t;
+      Tv_Usec : suseconds_t;
+   end record;
+   pragma Convention (C, Timeval);
+
+   type Timeval_Access is access all Timeval;
+   pragma Convention (C, Timeval_Access);
+
+   Immediat : constant Timeval := (0, 0);
+
+   -------------------------------------------
+   -- Mapping tables to low level constants --
+   -------------------------------------------
+
+   Families : constant array (Family_Type) of C.int :=
+                (Family_Inet  => Constants.AF_INET,
+                 Family_Inet6 => Constants.AF_INET6);
+
+   Lengths  : constant array (Family_Type) of C.unsigned_char :=
+                (Family_Inet  => Constants.SIZEOF_sockaddr_in,
+                 Family_Inet6 => Constants.SIZEOF_sockaddr_in6);
+
+   ----------------------------
+   -- Generic socket address --
+   ----------------------------
+
+   --  Common header
+
+   --  All socket address types (struct sockaddr, struct sockaddr_storage,
+   --  and protocol specific address types) start with the same 2-byte header,
+   --  which is either a length and a family (one byte each) or just a two-byte
+   --  family. The following unchecked union describes the two possible layouts
+   --  and is meant to be constrained with Constants.Have_Sockaddr_Len.
+
+   type Sockaddr_Length_And_Family
+     (Has_Sockaddr_Len : Boolean := False)
+   is record
+      case Has_Sockaddr_Len is
+         when True =>
+            Length      : C.unsigned_char;
+            Char_Family : C.unsigned_char;
+
+         when False =>
+            Short_Family : C.unsigned_short;
+      end case;
+   end record;
+   pragma Unchecked_Union (Sockaddr_Length_And_Family);
+   pragma Convention (C, Sockaddr_Length_And_Family);
+
+   procedure Set_Family
+     (Length_And_Family : out Sockaddr_Length_And_Family;
+      Family            : Family_Type);
+   --  Set the family component to the appropriate value for Family, and also
+   --  set Length accordingly if applicable on this platform.
+
+   type Sockaddr is record
+      Sa_Family : Sockaddr_Length_And_Family;
+      --  Address family (and address length on some platforms)
+
+      Sa_Data   : C.char_array (1 .. 14) := (others => C.nul);
+      --  Family-specific data
+      --  Note that some platforms require that all unused (reserved) bytes
+      --  in addresses be initialized to 0 (e.g. VxWorks).
+   end record;
+   pragma Convention (C, Sockaddr);
+   --  Generic socket address
+
+   type Sockaddr_Access is access all Sockaddr;
+   pragma Convention (C, Sockaddr_Access);
+   --  Access to socket address
+
+   ----------------------------
+   -- AF_INET socket address --
+   ----------------------------
+
+   type In_Addr is record
+      S_B1, S_B2, S_B3, S_B4 : C.unsigned_char;
+   end record;
+   for In_Addr'Alignment use C.int'Alignment;
+   pragma Convention (C, In_Addr);
+   --  IPv4 address, represented as a network-order C.int. Note that the
+   --  underlying operating system may assume that values of this type have
+   --  C.int alignment, so we need to provide a suitable alignment clause here.
+
+   function To_In_Addr is new Ada.Unchecked_Conversion (C.int, In_Addr);
+   function To_Int     is new Ada.Unchecked_Conversion (In_Addr, C.int);
+
+   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_In is record
+      Sin_Family : Sockaddr_Length_And_Family;
+      --  Address family (and address length on some platforms)
+
+      Sin_Port   : C.unsigned_short;
+      --  Port in network byte order
+
+      Sin_Addr   : In_Addr;
+      --  IPv4 address
+
+      Sin_Zero   : C.char_array (1 .. 8) := (others => C.nul);
+      --  Padding
+      --  Note that some platforms require that all unused (reserved) bytes
+      --  in addresses be initialized to 0 (e.g. VxWorks).
+   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
+
+   procedure Set_Port
+     (Sin  : Sockaddr_In_Access;
+      Port : C.unsigned_short);
+   pragma Inline (Set_Port);
+   --  Set Sin.Sin_Port to Port
+
+   procedure Set_Address
+     (Sin     : Sockaddr_In_Access;
+      Address : In_Addr);
+   pragma Inline (Set_Address);
+   --  Set Sin.Sin_Addr to Address
+
+   ---------------------
+   -- Service entries --
+   ---------------------
+
+   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 Servent is record
+      S_Name    : C.Strings.chars_ptr;
+      S_Aliases : Chars_Ptr_Pointers.Pointer;
+      S_Port    : C.int;
+      S_Proto   : C.Strings.chars_ptr;
+   end record;
+   pragma Convention (C, Servent);
+   --  Service entry
+
+   type Servent_Access is access all Servent;
+   pragma Convention (C, Servent_Access);
+   --  Access to service entry
+
+   ------------------
+   -- Host entries --
+   ------------------
+
+   type Hostent is record
+      H_Name      : C.Strings.chars_ptr;
+      H_Aliases   : Chars_Ptr_Pointers.Pointer;
+      H_Addrtype  : Constants.H_Addrtype_T;
+      H_Length    : Constants.H_Length_T;
+      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
+
+   ----------------------------
+   -- Socket sets management --
+   ----------------------------
+
+   type Int_Access is access all C.int;
+   pragma Convention (C, Int_Access);
+   --  Access to C integers
+
+   procedure Free_Socket_Set (Set : Fd_Set_Access);
+   --  Free system-dependent socket set
+
+   procedure Get_Socket_From_Set
+     (Set    : Fd_Set_Access;
+      Socket : Int_Access;
+      Last   : Int_Access);
+   --  Get last socket in Socket and remove it from the socket set. The
+   --  parameter Last is a maximum value of the largest socket. This hint is
+   --  used to avoid scanning very large socket sets. After a call to
+   --  Get_Socket_From_Set, Last is set back to the real largest socket in the
+   --  socket set.
+
+   procedure Insert_Socket_In_Set
+     (Set    : Fd_Set_Access;
+      Socket : C.int);
+   --  Insert socket in the socket set
+
+   function  Is_Socket_In_Set
+     (Set    : Fd_Set_Access;
+      Socket : C.int) return C.int;
+   --  Check whether Socket is in the socket set, return a non-zero
+   --  value if it is, zero if it is not.
+
+   procedure Last_Socket_In_Set
+     (Set    : Fd_Set_Access;
+      Last   : Int_Access);
+   --  Find the largest socket in the socket set. This is needed for select().
+   --  When Last_Socket_In_Set is called, parameter Last is a maximum value of
+   --  the largest socket. This hint is used to avoid scanning very large
+   --  socket sets. After the call, Last is set back to the real largest socket
+   --  in the socket set.
+
+   function  New_Socket_Set
+     (Set : Fd_Set_Access) return Fd_Set_Access;
+   --  Allocate a new socket set which is a system-dependent structure and
+   --  initialize by copying Set if it is non-null, by making it empty
+   --  otherwise.
+
+   procedure Remove_Socket_From_Set
+     (Set    : Fd_Set_Access;
+      Socket : C.int);
+   --  Remove socket from the socket set
+
+   ------------------------------------------
+   -- Pairs of signalling file descriptors --
+   ------------------------------------------
+
+   type Two_Ints is array (0 .. 1) of C.int;
+   pragma Convention (C, Two_Ints);
+   --  Container for two int values
+
+   subtype Fd_Pair is Two_Ints;
+   --  Two_Ints as used for Create_Signalling_Fds: a pair of connected file
+   --  descriptors, one of which (the "read end" of the connection) being used
+   --  for reading, the other one (the "write end") being used for writing.
+
+   Read_End  : constant := 0;
+   Write_End : constant := 1;
+   --  Indices into an Fd_Pair value providing access to each of the connected
+   --  file descriptors.
+
+private
+
+   pragma Import (C, Free_Socket_Set, "__gnat_free_socket_set");
+   pragma Import (C, Get_Socket_From_Set, "__gnat_get_socket_from_set");
+   pragma Import (C, Is_Socket_In_Set, "__gnat_is_socket_in_set");
+   pragma Import (C, Last_Socket_In_Set, "__gnat_last_socket_in_set");
+   pragma Import (C, New_Socket_Set, "__gnat_new_socket_set");
+   pragma Import (C, Insert_Socket_In_Set, "__gnat_insert_socket_in_set");
+   pragma Import (C, Remove_Socket_From_Set, "__gnat_remove_socket_from_set");
+end GNAT.Sockets.Thin_Common;