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Diffstat (limited to 'gcc/ada/s-strcom.adb')
| -rw-r--r-- | gcc/ada/s-strcom.adb | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/gcc/ada/s-strcom.adb b/gcc/ada/s-strcom.adb deleted file mode 100644 index 4388d801e68..00000000000 --- a/gcc/ada/s-strcom.adb +++ /dev/null @@ -1,140 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT RUN-TIME LIBRARY COMPONENTS -- --- -- --- S Y S T E M . S T R I N G _ C O M P A R E -- --- -- --- B o d y -- --- -- --- Copyright (C) 2002-2013, 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. -- --- -- ------------------------------------------------------------------------------- - -pragma Compiler_Unit_Warning; - -with Ada.Unchecked_Conversion; - -package body System.String_Compare is - - type Word is mod 2 ** 32; - -- Used to process operands by words - - type Big_Words is array (Natural) of Word; - type Big_Words_Ptr is access Big_Words; - for Big_Words_Ptr'Storage_Size use 0; - -- Array type used to access by words - - type Byte is mod 2 ** 8; - -- Used to process operands by bytes - - type Big_Bytes is array (Natural) of Byte; - type Big_Bytes_Ptr is access Big_Bytes; - for Big_Bytes_Ptr'Storage_Size use 0; - -- Array type used to access by bytes - - function To_Big_Words is new - Ada.Unchecked_Conversion (System.Address, Big_Words_Ptr); - - function To_Big_Bytes is new - Ada.Unchecked_Conversion (System.Address, Big_Bytes_Ptr); - - ----------------- - -- Str_Compare -- - ----------------- - - function Str_Compare - (Left : System.Address; - Right : System.Address; - Left_Len : Natural; - Right_Len : Natural) return Integer - is - Compare_Len : constant Natural := Natural'Min (Left_Len, Right_Len); - - begin - -- If operands are non-aligned, or length is too short, go by bytes - - if (((Left or Right) and 2#11#) /= 0) or else Compare_Len < 4 then - return Str_Compare_Bytes (Left, Right, Left_Len, Right_Len); - end if; - - -- Here we can go by words - - declare - LeftP : constant Big_Words_Ptr := To_Big_Words (Left); - RightP : constant Big_Words_Ptr := To_Big_Words (Right); - Clen4 : constant Natural := Compare_Len / 4 - 1; - Clen4F : constant Natural := Clen4 * 4; - - begin - for J in 0 .. Clen4 loop - if LeftP (J) /= RightP (J) then - return Str_Compare_Bytes - (Left + Address (4 * J), - Right + Address (4 * J), - 4, 4); - end if; - end loop; - - return Str_Compare_Bytes - (Left + Address (Clen4F), - Right + Address (Clen4F), - Left_Len - Clen4F, - Right_Len - Clen4F); - end; - end Str_Compare; - - ----------------------- - -- Str_Compare_Bytes -- - ----------------------- - - function Str_Compare_Bytes - (Left : System.Address; - Right : System.Address; - Left_Len : Natural; - Right_Len : Natural) return Integer - is - Compare_Len : constant Natural := Natural'Min (Left_Len, Right_Len); - - LeftP : constant Big_Bytes_Ptr := To_Big_Bytes (Left); - RightP : constant Big_Bytes_Ptr := To_Big_Bytes (Right); - - begin - for J in 0 .. Compare_Len - 1 loop - if LeftP (J) /= RightP (J) then - if LeftP (J) > RightP (J) then - return +1; - else - return -1; - end if; - end if; - end loop; - - if Left_Len = Right_Len then - return 0; - elsif Left_Len > Right_Len then - return +1; - else - return -1; - end if; - end Str_Compare_Bytes; - -end System.String_Compare; |