gcc/ada/libgnat/s-conca4.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
   4 --                                                                          --
   5 --                      S Y S T E M . C O N C A T _ 4                       --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --            Copyright (C) 2008-2020, 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 a procedure for runtime concatenation of four string
  33 --  operands. It is used when we want to save space in the generated code.
  34
  35 pragma Compiler_Unit_Warning;
  36
  37 package System.Concat_4 is
  38
  39    procedure Str_Concat_4 (R : out String; S1, S2, S3, S4 : String);
  40    --  Performs the operation R := S1 & S2 & S3 & S4. The bounds
  41    --  of R are known to be correct (usually set by a call to the
  42    --  Str_Concat_Bounds_5 procedure below), so no bounds checks are required,
  43    --  and it is known that none of the input operands overlaps R. No
  44    --  assumptions can be made about the lower bounds of any of the operands.
  45
  46    procedure Str_Concat_Bounds_4
  47      (Lo, Hi         : out Natural;
  48       S1, S2, S3, S4 : String);
  49    --  Assigns to Lo..Hi the bounds of the result of concatenating the four
  50    --  given strings, following the rules in the RM regarding null operands.
  51
  52 end System.Concat_4;