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Diffstat (limited to 'gcc-4.2.1/gcc/ada/table.ads')
| -rw-r--r-- | gcc-4.2.1/gcc/ada/table.ads | 236 |
1 files changed, 0 insertions, 236 deletions
diff --git a/gcc-4.2.1/gcc/ada/table.ads b/gcc-4.2.1/gcc/ada/table.ads deleted file mode 100644 index 983f7fd0e..000000000 --- a/gcc-4.2.1/gcc/ada/table.ads +++ /dev/null @@ -1,236 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT COMPILER COMPONENTS -- --- -- --- T A B L E -- --- -- --- S p e c -- --- -- --- Copyright (C) 1992-2005, 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. -- --- -- --- GNAT was originally developed by the GNAT team at New York University. -- --- Extensive contributions were provided by Ada Core Technologies Inc. -- --- -- ------------------------------------------------------------------------------- - --- This package provides an implementation of dynamically resizable one --- dimensional arrays. The idea is to mimic the normal Ada semantics for --- arrays as closely as possible with the one additional capability of --- dynamically modifying the value of the Last attribute. - --- Note that this interface should remain synchronized with those in --- GNAT.Table and GNAT.Dynamic_Tables to keep coherency between these --- three related units. - -with Types; use Types; - -package Table is - pragma Elaborate_Body; - - generic - type Table_Component_Type is private; - type Table_Index_Type is range <>; - - Table_Low_Bound : Table_Index_Type; - Table_Initial : Pos; - Table_Increment : Nat; - Table_Name : String; - - package Table is - - -- Table_Component_Type and Table_Index_Type specify the type of the - -- array, Table_Low_Bound is the lower bound. Index_type must be an - -- integer type. The effect is roughly to declare: - - -- Table : array (Table_Index_Type range Table_Low_Bound .. <>) - -- of Table_Component_Type; - - -- Note: since the upper bound can be one less than the lower - -- bound for an empty array, the table index type must be able - -- to cover this range, e.g. if the lower bound is 1, then the - -- Table_Index_Type should be Natural rather than Positive. - - -- Table_Component_Type may be any Ada type, except that controlled - -- types are not supported. Note however that default initialization - -- will NOT occur for array components. - - -- The Table_Initial values controls the allocation of the table when - -- it is first allocated, either by default, or by an explicit Init - -- call. The value used is Opt.Table_Factor * Table_Initial. - - -- The Table_Increment value controls the amount of increase, if the - -- table has to be increased in size. The value given is a percentage - -- value (e.g. 100 = increase table size by 100%, i.e. double it). - - -- The Table_Name parameter is simply use in debug output messages it - -- has no other usage, and is not referenced in non-debugging mode. - - -- The Last and Set_Last subprograms provide control over the current - -- logical allocation. They are quite efficient, so they can be used - -- freely (expensive reallocation occurs only at major granularity - -- chunks controlled by the allocation parameters). - - -- Note: We do not make the table components aliased, since this would - -- restict the use of table for discriminated types. If it is necessary - -- to take the access of a table element, use Unrestricted_Access. - - -- WARNING: On HPPA, the virtual addressing approach used in this unit - -- is incompatible with the indexing instructions on the HPPA. So when - -- using this unit, compile your application with -mdisable-indexing. - - -- WARNING: If the table is reallocated, then the address of all its - -- components will change. So do not capture the address of an element - -- and then use the address later after the table may be reallocated. - -- One tricky case of this is passing an element of the table to a - -- subprogram by reference where the table gets reallocated during - -- the execution of the subprogram. The best rule to follow is never - -- to pass a table element as a parameter except for the case of IN - -- mode parameters with scalar values. - - type Table_Type is - array (Table_Index_Type range <>) of Table_Component_Type; - - subtype Big_Table_Type is - Table_Type (Table_Low_Bound .. Table_Index_Type'Last); - -- We work with pointers to a bogus array type that is constrained - -- with the maximum possible range bound. This means that the pointer - -- is a thin pointer, which is more efficient. Since subscript checks - -- in any case must be on the logical, rather than physical bounds, - -- safety is not compromised by this approach. - - type Table_Ptr is access all Big_Table_Type; - -- The table is actually represented as a pointer to allow reallocation - - Table : aliased Table_Ptr := null; - -- The table itself. The lower bound is the value of Low_Bound. - -- Logically the upper bound is the current value of Last (although - -- the actual size of the allocated table may be larger than this). - -- The program may only access and modify Table entries in the range - -- First .. Last. - - Locked : Boolean := False; - -- Table expansion is permitted only if this switch is set to False. A - -- client may set Locked to True, in which case any attempt to expand - -- the table will cause an assertion failure. Note that while a table - -- is locked, its address in memory remains fixed and unchanging. This - -- feature is used to control table expansion during Gigi processing. - -- Gigi assumes that tables other than the Uint and Ureal tables do - -- not move during processing, which means that they cannot be expanded. - -- The Locked flag is used to enforce this restriction. - - procedure Init; - -- This procedure allocates a new table of size Initial (freeing any - -- previously allocated larger table). It is not necessary to call - -- Init when a table is first instantiated (since the instantiation does - -- the same initialization steps). However, it is harmless to do so, and - -- Init is convenient in reestablishing a table for new use. - - function Last return Table_Index_Type; - pragma Inline (Last); - -- Returns the current value of the last used entry in the table, which - -- can then be used as a subscript for Table. Note that the only way to - -- modify Last is to call the Set_Last procedure. Last must always be - -- used to determine the logically last entry. - - procedure Release; - -- Storage is allocated in chunks according to the values given in the - -- Initial and Increment parameters. A call to Release releases all - -- storage that is allocated, but is not logically part of the current - -- array value. Current array values are not affected by this call. - - procedure Free; - -- Free all allocated memory for the table. A call to init is required - -- before any use of this table after calling Free. - - First : constant Table_Index_Type := Table_Low_Bound; - -- Export First as synonym for Low_Bound (parallel with use of Last) - - procedure Set_Last (New_Val : Table_Index_Type); - pragma Inline (Set_Last); - -- This procedure sets Last to the indicated value. If necessary the - -- table is reallocated to accommodate the new value (i.e. on return - -- the allocated table has an upper bound of at least Last). If Set_Last - -- reduces the size of the table, then logically entries are removed - -- from the table. If Set_Last increases the size of the table, then - -- new entries are logically added to the table. - - procedure Increment_Last; - pragma Inline (Increment_Last); - -- Adds 1 to Last (same as Set_Last (Last + 1) - - procedure Decrement_Last; - pragma Inline (Decrement_Last); - -- Subtracts 1 from Last (same as Set_Last (Last - 1) - - procedure Append (New_Val : Table_Component_Type); - pragma Inline (Append); - -- Equivalent to: - -- x.Increment_Last; - -- x.Table (x.Last) := New_Val; - -- i.e. the table size is increased by one, and the given new item - -- stored in the newly created table element. - - procedure Set_Item - (Index : Table_Index_Type; - Item : Table_Component_Type); - pragma Inline (Set_Item); - -- Put Item in the table at position Index. The table is expanded if - -- current table length is less than Index and in that case Last is set - -- to Index. Item will replace any value already present in the table - -- at this position. - - type Saved_Table is private; - -- Type used for Save/Restore subprograms - - function Save return Saved_Table; - -- Resets table to empty, but saves old contents of table in returned - -- value, for possible later restoration by a call to Restore. - - procedure Restore (T : Saved_Table); - -- Given a Saved_Table value returned by a prior call to Save, restores - -- the table to the state it was in at the time of the Save call. - - procedure Tree_Write; - -- Writes out contents of table using Tree_IO - - procedure Tree_Read; - -- Initializes table by reading contents previously written - -- with the Tree_Write call (also using Tree_IO) - - private - - Last_Val : Int; - -- Current value of Last. Note that we declare this in the private part - -- because we don't want the client to modify Last except through one of - -- the official interfaces (since a modification to Last may require a - -- reallocation of the table). - - Max : Int; - -- Subscript of the maximum entry in the currently allocated table - - type Saved_Table is record - Last_Val : Int; - Max : Int; - Table : Table_Ptr; - end record; - - end Table; -end Table; |