gcc/ada/s-wchstw.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                       S Y S T E M . W C H _ S T W                        --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2009, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 --  This package contains the routine used to convert strings to wide (wide)
  33 --  strings for use by wide (wide) image attribute.
  34
  35 with System.WCh_Con;
  36
  37 package System.WCh_StW is
  38    pragma Pure;
  39
  40    procedure String_To_Wide_String
  41      (S  : String;
  42       R  : out Wide_String;
  43       L  : out Natural;
  44       EM : System.WCh_Con.WC_Encoding_Method);
  45    --  This routine simply takes its argument and converts it to wide string
  46    --  format, storing the result in R (1 .. L), with L being set appropriately
  47    --  on return. The caller guarantees that R is long enough to accommodate
  48    --  the result. This is used in the context of the Wide_Image attribute,
  49    --  where the argument is the corresponding 'Image attribute. Any wide
  50    --  character escape sequences in the string are converted to the
  51    --  corresponding wide character value. No syntax checks are made, it is
  52    --  assumed that any such sequences are validly formed (this must be assured
  53    --  by the caller), and results from the fact that Wide_Image is only used
  54    --  on strings that have been built by the compiler, such as images of
  55    --  enumeration literals. If the method for encoding is a shift-in,
  56    --  shift-out convention, then it is assumed that normal (non-wide
  57    --  character) mode holds at the start and end of the argument string. EM
  58    --  indicates the wide character encoding method.
  59    --  Note: in the WCEM_Brackets case, the brackets escape sequence is used
  60    --  only for codes greater than 16#FF#.
  61
  62    procedure String_To_Wide_Wide_String
  63      (S  : String;
  64       R  : out Wide_Wide_String;
  65       L  : out Natural;
  66       EM : System.WCh_Con.WC_Encoding_Method);
  67    --  Same function with Wide_Wide_String output
  68
  69 end System.WCh_StW;