gcc/ada/i-cstrin.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                 I N T E R F A C E S . C . S T R I N G S                  --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1993-2009, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- This specification is derived from the Ada Reference Manual for use with --
  12 -- GNAT. The copyright notice above, and the license provisions that follow --
  13 -- apply solely to the  contents of the part following the private keyword. --
  14 --                                                                          --
  15 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  16 -- terms of the  GNU General Public License as published  by the Free Soft- --
  17 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  18 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  19 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  20 -- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
  21 --                                                                          --
  22 -- As a special exception under Section 7 of GPL version 3, you are granted --
  23 -- additional permissions described in the GCC Runtime Library Exception,   --
  24 -- version 3.1, as published by the Free Software Foundation.               --
  25 --                                                                          --
  26 -- You should have received a copy of the GNU General Public License and    --
  27 -- a copy of the GCC Runtime Library Exception along with this program;     --
  28 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  29 -- <http://www.gnu.org/licenses/>.                                          --
  30 --                                                                          --
  31 -- GNAT was originally developed  by the GNAT team at  New York University. --
  32 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  33 --                                                                          --
  34 ------------------------------------------------------------------------------
  35
  36 package Interfaces.C.Strings is
  37    pragma Preelaborate;
  38
  39    type char_array_access is access all char_array;
  40
  41    pragma No_Strict_Aliasing (char_array_access);
  42    --  Since this type is used for external interfacing, with the pointer
  43    --  coming from who knows where, it seems a good idea to turn off any
  44    --  strict aliasing assumptions for this type.
  45
  46    type chars_ptr is private;
  47
  48    type chars_ptr_array is array (size_t range <>) of chars_ptr;
  49
  50    Null_Ptr : constant chars_ptr;
  51
  52    function To_Chars_Ptr
  53      (Item      : char_array_access;
  54       Nul_Check : Boolean := False) return chars_ptr;
  55
  56    function New_Char_Array (Chars : char_array) return chars_ptr;
  57
  58    function New_String (Str : String) return chars_ptr;
  59
  60    procedure Free (Item : in out chars_ptr);
  61
  62    Dereference_Error : exception;
  63
  64    function Value (Item : chars_ptr) return char_array;
  65
  66    function Value
  67      (Item   : chars_ptr;
  68       Length : size_t) return char_array;
  69
  70    function Value (Item : chars_ptr) return String;
  71
  72    function Value
  73      (Item   : chars_ptr;
  74       Length : size_t) return String;
  75
  76    function Strlen (Item : chars_ptr) return size_t;
  77
  78    procedure Update
  79      (Item   : chars_ptr;
  80       Offset : size_t;
  81       Chars  : char_array;
  82       Check  : Boolean := True);
  83
  84    procedure Update
  85      (Item   : chars_ptr;
  86       Offset : size_t;
  87       Str    : String;
  88       Check  : Boolean := True);
  89
  90    Update_Error : exception;
  91
  92 private
  93    type chars_ptr is access all Character;
  94    pragma Convention (C, chars_ptr);
  95
  96    pragma No_Strict_Aliasing (chars_ptr);
  97    --  Since this type is used for external interfacing, with the pointer
  98    --  coming from who knows where, it seems a good idea to turn off any
  99    --  strict aliasing assumptions for this type.
 100
 101    Null_Ptr : constant chars_ptr := null;
 102 end Interfaces.C.Strings;