1------------------------------------------------------------------------------ 2-- -- 3-- GNAT RUN-TIME LIBRARY COMPONENTS -- 4-- -- 5-- S Y S T E M . S T R I N G _ C O M P A R E -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 2002-2018, 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 3, 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. -- 17-- -- 18-- As a special exception under Section 7 of GPL version 3, you are granted -- 19-- additional permissions described in the GCC Runtime Library Exception, -- 20-- version 3.1, as published by the Free Software Foundation. -- 21-- -- 22-- You should have received a copy of the GNU General Public License and -- 23-- a copy of the GCC Runtime Library Exception along with this program; -- 24-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- 25-- <http://www.gnu.org/licenses/>. -- 26-- -- 27-- GNAT was originally developed by the GNAT team at New York University. -- 28-- Extensive contributions were provided by Ada Core Technologies Inc. -- 29-- -- 30------------------------------------------------------------------------------ 31 32-- This package contains functions for runtime comparisons on strings 33 34pragma Compiler_Unit_Warning; 35 36package System.String_Compare is 37 38 function Str_Compare 39 (Left : System.Address; 40 Right : System.Address; 41 Left_Len : Natural; 42 Right_Len : Natural) return Integer; 43 -- Compare the string starting at address Left of length Left_Len 44 -- with the string starting at address Right of length Right_Len. 45 -- The comparison is in the normal Ada semantic sense of string 46 -- comparison. The result is -1,0,+1 for Left<Right, Left=Right, 47 -- Left>Right respectively. This function works with 4 byte words 48 -- if the operands are aligned on 4-byte boundaries and long enough. 49 50 function Str_Compare_Bytes 51 (Left : System.Address; 52 Right : System.Address; 53 Left_Len : Natural; 54 Right_Len : Natural) return Integer; 55 -- Same functionality as Str_Compare but always proceeds by bytes. 56 -- Used when the caller knows that the operands are unaligned, or 57 -- short enough that it makes no sense to go by words. 58 59end System.String_Compare; 60