diff options
Diffstat (limited to 'gcc/ada/a-coprnu.ads')
| -rw-r--r-- | gcc/ada/a-coprnu.ads | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/gcc/ada/a-coprnu.ads b/gcc/ada/a-coprnu.ads index 20e49d87996..0f832d125e6 100644 --- a/gcc/ada/a-coprnu.ads +++ b/gcc/ada/a-coprnu.ads @@ -6,13 +6,34 @@ -- -- -- S p e c -- -- -- --- This specification is adapted from the Ada Reference Manual for use with -- --- GNAT. In accordance with the copyright of that document, you can freely -- --- copy and modify this specification, provided that if you redistribute a -- --- modified version, any changes that you have made are clearly indicated. -- +-- Copyright (C) 2004-2006, 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, 51 Franklin Street, Fifth Floor, -- +-- Boston, MA 02110-1301, 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. -- +-- -- +-- This unit was originally developed by Matthew J Heaney. -- ------------------------------------------------------------------------------ +-- This package declares the prime numbers array used to implement hashed +-- containers. Bucket arrays are always allocated with a prime-number +-- length (computed using To_Prime below), as this produces better scatter +-- when hash values are folded. + package Ada.Containers.Prime_Numbers is pragma Pure; @@ -27,5 +48,6 @@ package Ada.Containers.Prime_Numbers is 1610612741, 3221225473, 4294967291); function To_Prime (Length : Count_Type) return Hash_Type; + -- Returns the smallest value in Primes not less than Length end Ada.Containers.Prime_Numbers; |