gcc/gcc/ada/a-strsup.ads

------------------------------------------------------------------------------
--                                                                          --
--                         GNAT RUN-TIME COMPONENTS                         --
--                                                                          --
--             A D A . S T R I N G S . S U P E R B O U N D E D              --
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--          Copyright (C) 2003-2012, Free Software Foundation, Inc.         --
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-- GNAT is free software;  you can  redistribute it  and/or modify it under --
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-- GNAT was originally developed  by the GNAT team at  New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

--  This non generic package contains most of the implementation of the
--  generic package Ada.Strings.Bounded.Generic_Bounded_Length.

--  It defines type Super_String as a discriminated record with the maximum
--  length as the discriminant. Individual instantiations of Strings.Bounded
--  use this type with an appropriate discriminant value set.

with Ada.Strings.Maps;

package Ada.Strings.Superbounded is
   pragma Preelaborate;

   --  Type Bounded_String in Ada.Strings.Bounded.Generic_Bounded_Length is
   --  derived from Super_String, with the constraint of the maximum length.

   type Super_String (Max_Length : Positive) is record
      Current_Length : Natural := 0;
      Data           : String (1 .. Max_Length);
      --  A previous version had a default initial value for Data, which is
      --  no longer necessary, because we now special-case this type in the
      --  compiler, so "=" composes properly for descendants of this type.
      --  Leaving it out is more efficient.
   end record;

   --  The subprograms defined for Super_String are similar to those
   --  defined for Bounded_String, except that they have different names, so
   --  that they can be renamed in Ada.Strings.Bounded.Generic_Bounded_Length.

   function Super_Length (Source : Super_String) return Natural;

   --------------------------------------------------------
   -- Conversion, Concatenation, and Selection Functions --
   --------------------------------------------------------

   function To_Super_String
     (Source     : String;
      Max_Length : Natural;
      Drop       : Truncation := Error) return Super_String;
   --  Note the additional parameter Max_Length, which specifies the maximum
   --  length setting of the resulting Super_String value.

   --  The following procedures have declarations (and semantics) that are
   --  exactly analogous to those declared in Ada.Strings.Bounded.

   function Super_To_String (Source : Super_String) return String;

   procedure Set_Super_String
     (Target : out Super_String;
      Source : String;
      Drop   : Truncation := Error);

   function Super_Append
     (Left  : Super_String;
      Right : Super_String;
      Drop  : Truncation  := Error) return Super_String;

   function Super_Append
     (Left  : Super_String;
      Right : String;
      Drop  : Truncation := Error) return Super_String;

   function Super_Append
     (Left  : String;
      Right : Super_String;
      Drop  : Truncation := Error) return Super_String;

   function Super_Append
     (Left  : Super_String;
      Right : Character;
      Drop  : Truncation := Error) return Super_String;

   function Super_Append
     (Left  : Character;
      Right : Super_String;
      Drop  : Truncation := Error) return Super_String;

   procedure Super_Append
     (Source   : in out Super_String;
      New_Item : Super_String;
      Drop     : Truncation  := Error);

   procedure Super_Append
     (Source   : in out Super_String;
      New_Item : String;
      Drop     : Truncation  := Error);

   procedure Super_Append
     (Source   : in out Super_String;
      New_Item : Character;
      Drop     : Truncation  := Error);

   function Concat
     (Left  : Super_String;
      Right : Super_String) return Super_String;

   function Concat
     (Left  : Super_String;
      Right : String) return Super_String;

   function Concat
     (Left  : String;
      Right : Super_String) return Super_String;

   function Concat
     (Left  : Super_String;
      Right : Character) return Super_String;

   function Concat
     (Left  : Character;
      Right : Super_String) return Super_String;

   function Super_Element
     (Source : Super_String;
      Index  : Positive) return Character;

   procedure Super_Replace_Element
     (Source : in out Super_String;
      Index  : Positive;
      By     : Character);

   function Super_Slice
     (Source : Super_String;
      Low    : Positive;
      High   : Natural) return String;

   function Super_Slice
     (Source : Super_String;
      Low    : Positive;
      High   : Natural) return Super_String;

   procedure Super_Slice
     (Source : Super_String;
      Target : out Super_String;
      Low    : Positive;
      High   : Natural);

   function "="
     (Left  : Super_String;
      Right : Super_String) return Boolean;

   function Equal
     (Left  : Super_String;
      Right : Super_String) return Boolean renames "=";

   function Equal
     (Left  : Super_String;
      Right : String) return Boolean;

   function Equal
     (Left  : String;
      Right : Super_String) return Boolean;

   function Less
     (Left  : Super_String;
      Right : Super_String) return Boolean;

   function Less
     (Left  : Super_String;
      Right : String) return Boolean;

   function Less
     (Left  : String;
      Right : Super_String) return Boolean;

   function Less_Or_Equal
     (Left  : Super_String;
      Right : Super_String) return Boolean;

   function Less_Or_Equal
     (Left  : Super_String;
      Right : String) return Boolean;

   function Less_Or_Equal
     (Left  : String;
      Right : Super_String) return Boolean;

   function Greater
     (Left  : Super_String;
      Right : Super_String) return Boolean;

   function Greater
     (Left  : Super_String;
      Right : String) return Boolean;

   function Greater
     (Left  : String;
      Right : Super_String) return Boolean;

   function Greater_Or_Equal
     (Left  : Super_String;
      Right : Super_String) return Boolean;

   function Greater_Or_Equal
     (Left  : Super_String;
      Right : String) return Boolean;

   function Greater_Or_Equal
     (Left  : String;
      Right : Super_String) return Boolean;

   ----------------------
   -- Search Functions --
   ----------------------

   function Super_Index
     (Source  : Super_String;
      Pattern : String;
      Going   : Direction := Forward;
      Mapping : Maps.Character_Mapping := Maps.Identity) return Natural;

   function Super_Index
     (Source  : Super_String;
      Pattern : String;
      Going   : Direction := Forward;
      Mapping : Maps.Character_Mapping_Function) return Natural;

   function Super_Index
     (Source : Super_String;
      Set    : Maps.Character_Set;
      Test   : Membership := Inside;
      Going  : Direction  := Forward) return Natural;

   function Super_Index
     (Source  : Super_String;
      Pattern : String;
      From    : Positive;
      Going   : Direction := Forward;
      Mapping : Maps.Character_Mapping := Maps.Identity) return Natural;

   function Super_Index
     (Source  : Super_String;
      Pattern : String;
      From    : Positive;
      Going   : Direction := Forward;
      Mapping : Maps.Character_Mapping_Function) return Natural;

   function Super_Index
     (Source : Super_String;
      Set    : Maps.Character_Set;
      From   : Positive;
      Test   : Membership := Inside;
      Going  : Direction := Forward) return Natural;

   function Super_Index_Non_Blank
     (Source : Super_String;
      Going  : Direction := Forward) return Natural;

   function Super_Index_Non_Blank
     (Source : Super_String;
      From   : Positive;
      Going  : Direction := Forward) return Natural;

   function Super_Count
     (Source  : Super_String;
      Pattern : String;
      Mapping : Maps.Character_Mapping := Maps.Identity) return Natural;

   function Super_Count
     (Source  : Super_String;
      Pattern : String;
      Mapping : Maps.Character_Mapping_Function) return Natural;

   function Super_Count
     (Source : Super_String;
      Set    : Maps.Character_Set) return Natural;

   procedure Super_Find_Token
     (Source : Super_String;
      Set    : Maps.Character_Set;
      From   : Positive;
      Test   : Membership;
      First  : out Positive;
      Last   : out Natural);

   procedure Super_Find_Token
     (Source : Super_String;
      Set    : Maps.Character_Set;
      Test   : Membership;
      First  : out Positive;
      Last   : out Natural);

   ------------------------------------
   -- String Translation Subprograms --
   ------------------------------------

   function Super_Translate
     (Source  : Super_String;
      Mapping : Maps.Character_Mapping) return Super_String;

   procedure Super_Translate
     (Source   : in out Super_String;
      Mapping  : Maps.Character_Mapping);

   function Super_Translate
     (Source  : Super_String;
      Mapping : Maps.Character_Mapping_Function) return Super_String;

   procedure Super_Translate
     (Source  : in out Super_String;
      Mapping : Maps.Character_Mapping_Function);

   ---------------------------------------
   -- String Transformation Subprograms --
   ---------------------------------------

   function Super_Replace_Slice
     (Source : Super_String;
      Low    : Positive;
      High   : Natural;
      By     : String;
      Drop   : Truncation := Error) return Super_String;

   procedure Super_Replace_Slice
     (Source  : in out Super_String;
      Low     : Positive;
      High    : Natural;
      By      : String;
      Drop    : Truncation := Error);

   function Super_Insert
     (Source   : Super_String;
      Before   : Positive;
      New_Item : String;
      Drop     : Truncation := Error) return Super_String;

   procedure Super_Insert
     (Source   : in out Super_String;
      Before   : Positive;
      New_Item : String;
      Drop     : Truncation := Error);

   function Super_Overwrite
     (Source   : Super_String;
      Position : Positive;
      New_Item : String;
      Drop     : Truncation := Error) return Super_String;

   procedure Super_Overwrite
     (Source    : in out Super_String;
      Position  : Positive;
      New_Item  : String;
      Drop      : Truncation := Error);

   function Super_Delete
     (Source  : Super_String;
      From    : Positive;
      Through : Natural) return Super_String;

   procedure Super_Delete
     (Source  : in out Super_String;
      From    : Positive;
      Through : Natural);

   ---------------------------------
   -- String Selector Subprograms --
   ---------------------------------

   function Super_Trim
     (Source : Super_String;
      Side   : Trim_End) return Super_String;

   procedure Super_Trim
     (Source : in out Super_String;
      Side   : Trim_End);

   function Super_Trim
     (Source : Super_String;
      Left   : Maps.Character_Set;
      Right  : Maps.Character_Set) return Super_String;

   procedure Super_Trim
     (Source : in out Super_String;
      Left   : Maps.Character_Set;
      Right  : Maps.Character_Set);

   function Super_Head
     (Source : Super_String;
      Count  : Natural;
      Pad    : Character := Space;
      Drop   : Truncation := Error) return Super_String;

   procedure Super_Head
     (Source : in out Super_String;
      Count  : Natural;
      Pad    : Character := Space;
      Drop   : Truncation := Error);

   function Super_Tail
     (Source : Super_String;
      Count  : Natural;
      Pad    : Character := Space;
      Drop   : Truncation := Error) return Super_String;

   procedure Super_Tail
     (Source : in out Super_String;
      Count  : Natural;
      Pad    : Character := Space;
      Drop   : Truncation := Error);

   ------------------------------------
   -- String Constructor Subprograms --
   ------------------------------------

   --  Note: in some of the following routines, there is an extra parameter
   --  Max_Length which specifies the value of the maximum length for the
   --  resulting Super_String value.

   function Times
     (Left       : Natural;
      Right      : Character;
      Max_Length : Positive) return Super_String;
   --  Note the additional parameter Max_Length

   function Times
     (Left       : Natural;
      Right      : String;
      Max_Length : Positive) return Super_String;
   --  Note the additional parameter Max_Length

   function Times
     (Left  : Natural;
      Right : Super_String) return Super_String;

   function Super_Replicate
     (Count      : Natural;
      Item       : Character;
      Drop       : Truncation := Error;
      Max_Length : Positive) return Super_String;
   --  Note the additional parameter Max_Length

   function Super_Replicate
     (Count      : Natural;
      Item       : String;
      Drop       : Truncation := Error;
      Max_Length : Positive) return Super_String;
   --  Note the additional parameter Max_Length

   function Super_Replicate
     (Count : Natural;
      Item  : Super_String;
      Drop  : Truncation := Error) return Super_String;

private
      --  Pragma Inline declarations

      pragma Inline ("=");
      pragma Inline (Less);
      pragma Inline (Less_Or_Equal);
      pragma Inline (Greater);
      pragma Inline (Greater_Or_Equal);
      pragma Inline (Concat);
      pragma Inline (Super_Count);
      pragma Inline (Super_Element);
      pragma Inline (Super_Find_Token);
      pragma Inline (Super_Index);
      pragma Inline (Super_Index_Non_Blank);
      pragma Inline (Super_Length);
      pragma Inline (Super_Replace_Element);
      pragma Inline (Super_Slice);
      pragma Inline (Super_To_String);

end Ada.Strings.Superbounded;