1------------------------------------------------------------------------------ 2-- -- 3-- GNU ADA RUNTIME LIBRARY (GNARL) COMPONENTS -- 4-- -- 5-- S Y S T E M . S T R I N G _ O P S -- 6-- -- 7-- B o d y -- 8-- -- 9-- Copyright (C) 1992-2002 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 2, 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. See the GNU General Public License -- 17-- for more details. You should have received a copy of the GNU General -- 18-- Public License distributed with GNAT; see file COPYING. If not, write -- 19-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- 20-- MA 02111-1307, USA. -- 21-- -- 22-- As a special exception, if other files instantiate generics from this -- 23-- unit, or you link this unit with other files to produce an executable, -- 24-- this unit does not by itself cause the resulting executable to be -- 25-- covered by the GNU General Public License. This exception does not -- 26-- however invalidate any other reasons why the executable file might be -- 27-- covered by the GNU Public License. -- 28-- -- 29-- GNAT was originally developed by the GNAT team at New York University. -- 30-- Extensive contributions were provided by Ada Core Technologies Inc. -- 31-- -- 32------------------------------------------------------------------------------ 33 34package body System.String_Ops is 35 36 ---------------- 37 -- Str_Concat -- 38 ---------------- 39 40 function Str_Concat (X, Y : String) return String is 41 begin 42 if X'Length <= 0 then 43 return Y; 44 45 else 46 declare 47 L : constant Natural := X'Length + Y'Length; 48 R : String (X'First .. X'First + L - 1); 49 50 begin 51 R (X'Range) := X; 52 R (X'First + X'Length .. R'Last) := Y; 53 return R; 54 end; 55 end if; 56 end Str_Concat; 57 58 ------------------- 59 -- Str_Concat_CC -- 60 ------------------- 61 62 function Str_Concat_CC (X, Y : Character) return String is 63 R : String (1 .. 2); 64 65 begin 66 R (1) := X; 67 R (2) := Y; 68 return R; 69 end Str_Concat_CC; 70 71 ------------------- 72 -- Str_Concat_CS -- 73 ------------------- 74 75 function Str_Concat_CS (X : Character; Y : String) return String is 76 R : String (1 .. Y'Length + 1); 77 78 begin 79 R (1) := X; 80 R (2 .. R'Last) := Y; 81 return R; 82 end Str_Concat_CS; 83 84 ------------------- 85 -- Str_Concat_SC -- 86 ------------------- 87 88 function Str_Concat_SC (X : String; Y : Character) return String is 89 begin 90 if X'Length <= 0 then 91 return (1 => Y); 92 93 else 94 declare 95 R : String (X'First .. X'Last + 1); 96 97 begin 98 R (X'Range) := X; 99 R (R'Last) := Y; 100 return R; 101 end; 102 end if; 103 end Str_Concat_SC; 104 105 ------------------- 106 -- Str_Normalize -- 107 ------------------- 108 109 procedure Str_Normalize (A : in out String) is 110 begin 111 for J in A'Range loop 112 A (J) := Character'Last; 113 end loop; 114 end Str_Normalize; 115 116 ------------------------ 117 -- Wide_Str_Normalize -- 118 ------------------------ 119 120 procedure Wide_Str_Normalize (A : in out Wide_String) is 121 begin 122 for J in A'Range loop 123 A (J) := Wide_Character'Last; 124 end loop; 125 end Wide_Str_Normalize; 126 127end System.String_Ops; 128