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Diffstat (limited to 'gcc-4.9/gcc/ada/s-valenu.ads')
| -rw-r--r-- | gcc-4.9/gcc/ada/s-valenu.ads | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/ada/s-valenu.ads b/gcc-4.9/gcc/ada/s-valenu.ads new file mode 100644 index 000000000..fa5d205d4 --- /dev/null +++ b/gcc-4.9/gcc/ada/s-valenu.ads @@ -0,0 +1,80 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- S Y S T E M . V A L _ E N U M -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 1992-2009, 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. -- +-- -- +------------------------------------------------------------------------------ + +-- This package is used to compute the Value attribute for enumeration types +-- other than those in packages Standard and System. See unit Exp_Imgv for +-- details of the format of constructed image tables. + +package System.Val_Enum is + pragma Pure; + + function Value_Enumeration_8 + (Names : String; + Indexes : System.Address; + Num : Natural; + Str : String) + return Natural; + -- Used to compute Enum'Value (Str) where Enum is some enumeration type + -- other than those defined in package Standard. Names is a string with + -- a lower bound of 1 containing the characters of all the enumeration + -- literals concatenated together in sequence. Indexes is the address + -- of an array of type array (0 .. N) of Natural_8, where N is the + -- number of enumeration literals in the type. The Indexes values are + -- the starting subscript of each enumeration literal, indexed by Pos + -- values, with an extra entry at the end containing Names'Length + 1. + -- The parameter Num is the value N - 1 (i.e. Enum'Pos (Enum'Last)). + -- The reason that Indexes is passed by address is that the actual type + -- is created on the fly by the expander. + -- + -- Str is the argument of the attribute function, and may have leading + -- and trailing spaces, and letters can be upper or lower case or mixed. + -- If the image is found in Names, then the corresponding Pos value is + -- returned. If not, Constraint_Error is raised. + + function Value_Enumeration_16 + (Names : String; + Indexes : System.Address; + Num : Natural; + Str : String) + return Natural; + -- Identical to Value_Enumeration_8 except that it handles types + -- using array (0 .. Num) of Natural_16 for the Indexes table. + + function Value_Enumeration_32 + (Names : String; + Indexes : System.Address; + Num : Natural; + Str : String) + return Natural; + -- Identical to Value_Enumeration_8 except that it handles types + -- using array (0 .. Num) of Natural_32 for the Indexes table. + +end System.Val_Enum; |