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Diffstat (limited to 'gcc/ada/s-strops.adb')
| -rw-r--r-- | gcc/ada/s-strops.adb | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/gcc/ada/s-strops.adb b/gcc/ada/s-strops.adb new file mode 100644 index 000000000..44a6a76bf --- /dev/null +++ b/gcc/ada/s-strops.adb @@ -0,0 +1,109 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- +-- -- +-- S Y S T E M . S T R I N G _ O P S -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1992-2009, Free Software Foundation, Inc. -- +-- -- +-- GNAT is free software; you can redistribute it and/or modify it under -- +-- terms of the GNU General Public License as published by the Free Soft- -- +-- ware Foundation; either version 3, or (at your option) any later ver- -- +-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- +-- OUT 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 -- +-- <http://www.gnu.org/licenses/>. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- NOTE: This package is obsolescent. It is no longer used by the compiler +-- which now generates concatenation inline. It is retained only because +-- it may be used during bootstrapping using old versions of the compiler. + +pragma Compiler_Unit; + +package body System.String_Ops is + + ---------------- + -- Str_Concat -- + ---------------- + + function Str_Concat (X, Y : String) return String is + begin + if X'Length = 0 then + return Y; + + else + declare + L : constant Natural := X'Length + Y'Length; + R : String (X'First .. X'First + L - 1); + + begin + R (X'Range) := X; + R (X'First + X'Length .. R'Last) := Y; + return R; + end; + end if; + end Str_Concat; + + ------------------- + -- Str_Concat_CC -- + ------------------- + + function Str_Concat_CC (X, Y : Character) return String is + R : String (1 .. 2); + + begin + R (1) := X; + R (2) := Y; + return R; + end Str_Concat_CC; + + ------------------- + -- Str_Concat_CS -- + ------------------- + + function Str_Concat_CS (X : Character; Y : String) return String is + R : String (1 .. Y'Length + 1); + + begin + R (1) := X; + R (2 .. R'Last) := Y; + return R; + end Str_Concat_CS; + + ------------------- + -- Str_Concat_SC -- + ------------------- + + function Str_Concat_SC (X : String; Y : Character) return String is + begin + if X'Length = 0 then + return (1 => Y); + + else + declare + R : String (X'First .. X'Last + 1); + + begin + R (X'Range) := X; + R (R'Last) := Y; + return R; + end; + end if; + end Str_Concat_SC; + +end System.String_Ops; |