------------------------------------------------------------------------------ -- Ada Web Server -- -- -- -- Copyright (C) 2003-2019, AdaCore -- -- -- -- This library is free software; you can redistribute it and/or modify -- -- it under terms of the GNU General Public License as published by the -- -- Free Software Foundation; either version 3, or (at your option) any -- -- later version. This library is distributed in the hope that it will be -- -- useful, but WITHOUT ANY WARRANTY; without even the implied warranty of -- -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. -- -- -- -- As a special exception under Section 7 of GPL version 3, you are -- -- granted additional permissions described in the GCC Runtime Library -- -- Exception, version 3.1, as published by the Free Software Foundation. -- -- -- -- You should have received a copy of the GNU General Public License and -- -- a copy of the GCC Runtime Library Exception along with this program; -- -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- -- . -- -- -- -- 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. -- ------------------------------------------------------------------------------ pragma Ada_2012; with Ada.Unchecked_Conversion; separate (AWS.Translator) package body Conversion is -- Check if fast version usable on the platform subtype Test_S is String (1 .. 5); subtype Test_A is Ada.Streams.Stream_Element_Array (1 .. 5); Is_Fast_Possible : constant Boolean := Test_S'Size = Test_A'Size and then Test_S'Alignment = Test_A'Alignment; -- Fast conversion between String and Stream_Element_Array. -- Only for Ada compilers and platforms, where it is possible. package Fast is function To_Stream_Element_Array (Data : String) return Stream_Element_Array with Inline; function To_String (Data : Stream_Element_Array) return String with Inline; end Fast; -- Portable conversion between String and Stream_Element_Array package Portable is function To_Stream_Element_Array (Data : String) return Stream_Element_Array with Inline; function To_Stream_Element_Array (Data : String) return Utils.Stream_Element_Array_Access with Inline; function To_String (Data : Stream_Element_Array) return String with Inline; end Portable; ---------- -- Fast -- ---------- package body Fast is ----------------------------- -- To_Stream_Element_Array -- ----------------------------- function To_Stream_Element_Array (Data : String) return Stream_Element_Array is subtype Fixed_String is String (Data'First .. Data'Last); subtype Fixed_Array is Stream_Element_Array (Stream_Element_Offset (Data'First) .. Stream_Element_Offset (Data'Last)); function To_Stream_Elements is new Ada.Unchecked_Conversion (Fixed_String, Fixed_Array); begin return To_Stream_Elements (Data); end To_Stream_Element_Array; --------------- -- To_String -- --------------- function To_String (Data : Stream_Element_Array) return String is Start : constant Positive := Positive (Stream_Element_Offset'Max (1, Data'First)); -- If possible keep Data'Range subtype Fixed_String is String (Start .. Start + Natural (Data'Length) - 1); subtype Fixed_Array is Stream_Element_Array (Data'First .. Data'Last); function To_Characters is new Ada.Unchecked_Conversion (Fixed_Array, Fixed_String); begin return To_Characters (Data); end To_String; end Fast; -------------- -- Portable -- -------------- package body Portable is ----------------------------- -- To_Stream_Element_Array -- ----------------------------- function To_Stream_Element_Array (Data : String) return Stream_Element_Array is Result : Stream_Element_Array (Stream_Element_Offset (Data'First) .. Stream_Element_Offset (Data'Last)); begin for K in Data'Range loop Result (Stream_Element_Offset (K)) := Character'Pos (Data (K)); end loop; return Result; end To_Stream_Element_Array; function To_Stream_Element_Array (Data : String) return Utils.Stream_Element_Array_Access is Result : constant Utils.Stream_Element_Array_Access := new Stream_Element_Array (Stream_Element_Offset (Data'First) .. Stream_Element_Offset (Data'Last)); begin for K in Data'Range loop Result (Stream_Element_Offset (K)) := Character'Pos (Data (K)); end loop; return Result; end To_Stream_Element_Array; --------------- -- To_String -- --------------- function To_String (Data : Stream_Element_Array) return String is Start : constant Positive := Positive (Stream_Element_Offset'Max (1, Data'First)); -- If possible keep Data'Range Result : String (Start .. Start + Natural (Data'Length) - 1); begin for K in Data'Range loop Result (Start + Natural (K - Data'First)) := Character'Val (Data (K)); end loop; return Result; end To_String; end Portable; ----------------------------- -- To_Stream_Element_Array -- ----------------------------- function To_Stream_Element_Array (Data : String) return Stream_Element_Array is begin if Is_Fast_Possible then return Fast.To_Stream_Element_Array (Data); else return Portable.To_Stream_Element_Array (Data); end if; end To_Stream_Element_Array; function To_Stream_Element_Array (Data : String) return Utils.Stream_Element_Array_Access is begin return Portable.To_Stream_Element_Array (Data); end To_Stream_Element_Array; --------------- -- To_String -- --------------- function To_String (Data : Stream_Element_Array) return String is begin if Is_Fast_Possible then return Fast.To_String (Data); else return Portable.To_String (Data); end if; end To_String; end Conversion;