Mercurial > hg > CbC > CbC_gcc
comparison gcc/ada/libgnat/s-carun8.ads @ 111:04ced10e8804
gcc 7
| author | kono |
|---|---|
| date | Fri, 27 Oct 2017 22:46:09 +0900 |
| parents | |
| children | 84e7813d76e9 |
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| 68:561a7518be6b | 111:04ced10e8804 |
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| 1 ------------------------------------------------------------------------------ | |
| 2 -- -- | |
| 3 -- GNAT RUN-TIME LIBRARY COMPONENTS -- | |
| 4 -- -- | |
| 5 -- S Y S T E M . C O M P A R E _ A R R A Y _ U N S I G N E D _ 8 -- | |
| 6 -- -- | |
| 7 -- S p e c -- | |
| 8 -- -- | |
| 9 -- Copyright (C) 2002-2017, 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 arrays whose | |
| 33 -- elements are 8-bit discrete type values to be treated as unsigned. | |
| 34 | |
| 35 pragma Compiler_Unit_Warning; | |
| 36 | |
| 37 package System.Compare_Array_Unsigned_8 is | |
| 38 | |
| 39 -- Note: although the functions in this package are in a sense Pure, the | |
| 40 -- package cannot be declared as Pure, since the arguments are addresses, | |
| 41 -- not the data, and the result is not pure wrt the address values. | |
| 42 | |
| 43 function Compare_Array_U8 | |
| 44 (Left : System.Address; | |
| 45 Right : System.Address; | |
| 46 Left_Len : Natural; | |
| 47 Right_Len : Natural) return Integer; | |
| 48 -- Compare the array starting at address Left of length Left_Len with the | |
| 49 -- array starting at address Right of length Right_Len. The comparison is | |
| 50 -- in the normal Ada semantic sense of array comparison. The result is -1, | |
| 51 -- 0, +1 for Left < Right, Left = Right, Left > Right respectively. This | |
| 52 -- function works with 4 byte words if the operands are aligned on 4-byte | |
| 53 -- boundaries and long enough. | |
| 54 | |
| 55 function Compare_Array_U8_Unaligned | |
| 56 (Left : System.Address; | |
| 57 Right : System.Address; | |
| 58 Left_Len : Natural; | |
| 59 Right_Len : Natural) return Integer; | |
| 60 -- Same functionality as Compare_Array_U8 but always proceeds by bytes. | |
| 61 -- Used when the caller knows that the operands are unaligned, or short | |
| 62 -- enough that it makes no sense to go by words. | |
| 63 | |
| 64 end System.Compare_Array_Unsigned_8; |