+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNU ADA RUNTIME LIBRARY (GNARL) COMPONENTS --
--- --
--- S Y S T E M . B I T _ O P S --
--- --
--- S p e c --
--- --
--- $Revision: 1.1.16.1 $
--- --
--- Copyright (C) 1992-1999, 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 2, 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. See the GNU General Public License --
--- for more details. You should have received a copy of the GNU General --
--- Public License distributed with GNAT; see file COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
--- --
--- As a special exception, if other files instantiate generics from this --
--- unit, or you link this unit with other files to produce an executable, --
--- this unit does not by itself cause the resulting executable to be --
--- covered by the GNU General Public License. This exception does not --
--- however invalidate any other reasons why the executable file might be --
--- covered by the GNU Public License. --
--- --
--- GNAT was originally developed by the GNAT team at New York University. --
--- Extensive contributions were provided by Ada Core Technologies Inc. --
--- --
-------------------------------------------------------------------------------
-
--- Operations on packed bit strings
-
-with System;
-
-package System.Bit_Ops is
-
- -- Note: in all the following routines, the System.Address parameters
- -- represent the address of the first byte of an array used to represent
- -- a packed array (of type System.Unsigned_Types.Packed_Bytes{1,2,4})
- -- The length in bits is passed as a separate parameter.
-
- procedure Bit_And
- (Left : System.Address;
- Llen : Natural;
- Right : Address;
- Rlen : Natural;
- Result : System.Address);
- -- Bitwise "and" of given bit string with result being placed in Result.
- -- The or operation is allowed to destroy unused bits in the last byte,
- -- i.e. to leave them set in an undefined manner. Note that Left, Right
- -- and Result always have the same length in bits (Len).
-
- function Bit_Eq
- (Left : System.Address;
- Llen : Natural;
- Right : System.Address;
- Rlen : Natural)
- return Boolean;
- -- Left and Right are the addresses of two bit packed arrays with Llen
- -- and Rlen being the respective length in bits. The routine compares the
- -- two bit strings for equality, being careful not to include the unused
- -- bits in the final byte. Note that the result is always False if Rlen
- -- is not equal to Llen.
-
- procedure Bit_Not
- (Opnd : System.Address;
- Len : Natural;
- Result : System.Address);
- -- Bitwise "not" of given bit string with result being placed in Result.
- -- The not operation is allowed to destroy unused bits in the last byte,
- -- i.e. to leave them set in an undefined manner. Note that Result and
- -- Opnd always have the same length in bits (Len).
-
- procedure Bit_Or
- (Left : System.Address;
- Llen : Natural;
- Right : Address;
- Rlen : Natural;
- Result : System.Address);
- -- Bitwise "or" of given bit string with result being placed in Result.
- -- The or operation is allowed to destroy unused bits in the last byte,
- -- i.e. to leave them set in an undefined manner. Note that Left, Right
- -- and Result always have the same length in bits (Len).
-
- procedure Bit_Xor
- (Left : System.Address;
- Llen : Natural;
- Right : Address;
- Rlen : Natural;
- Result : System.Address);
- -- Bitwise "xor" of given bit string with result being placed in Result.
- -- The or operation is allowed to destroy unused bits in the last byte,
- -- i.e. to leave them set in an undefined manner. Note that Left, Right
- -- and Result always have the same length in bits (Len).
-
-end System.Bit_Ops;
projects / msp430-gcc.git / blobdiff