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jlechner |
/****************************************************************************
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* *
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* GNAT COMPILER COMPONENTS *
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* *
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* E L I S T S *
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* *
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* C Header File *
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* *
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* Copyright (C) 1992-2003 Free Software Foundation, Inc. *
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* *
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* GNAT is free software; you can redistribute it and/or modify it under *
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* terms of the GNU General Public License as published by the Free Soft- *
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* ware Foundation; either version 2, or (at your option) any later ver- *
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* sion. GNAT is distributed in the hope that it will be useful, but WITH- *
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* OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License *
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* for more details. You should have received a copy of the GNU General *
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* Public License distributed with GNAT; see file COPYING. If not, write *
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* to the Free Software Foundation, 51 Franklin Street, Fifth Floor, *
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* Boston, MA 02110-1301, USA. *
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* *
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* GNAT was originally developed by the GNAT team at New York University. *
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* Extensive contributions were provided by Ada Core Technologies Inc. *
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* *
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****************************************************************************/
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/* This is the C header corresponding to the Ada package specification for
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Elists. It also contains the implementations of inlined functions from the
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package body for Elists. It was generated manually from elists.ads and
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elists.adb and must be kept synchronized with changes in these files.
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Note that only routines for reading the tree are included, since the
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tree transformer is not supposed to modify the tree in any way. */
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/* The following are the structures used to hold element lists */
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struct Elist_Header
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{
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Elmt_Id first;
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Elmt_Id last;
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};
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struct Elmt_Item
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{
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Node_Id node;
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Int next;
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};
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/* The element list headers and element descriptors themselves are stored in
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two arrays. The pointers to these arrays are passed as a parameter to the
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tree transformer procedure and stored in the global variables Elists_Ptr
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and Elmts_Ptr. */
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extern struct Elist_Header *Elists_Ptr;
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extern struct Elmt_Item *Elmts_Ptr;
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/* Element List Access Functions: */
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static Node_Id Node (Elmt_Id);
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static Elmt_Id First_Elmt (Elist_Id);
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static Elmt_Id Last_Elmt (Elist_Id);
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static Elmt_Id Next_Elmt (Elmt_Id);
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static Boolean Is_Empty_Elmt_List (Elist_Id);
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INLINE Node_Id
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Node (Elmt_Id Elmt)
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{
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return Elmts_Ptr[Elmt - First_Elmt_Id].node;
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}
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INLINE Elmt_Id
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First_Elmt (Elist_Id List)
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{
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return Elists_Ptr[List - First_Elist_Id].first;
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}
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INLINE Elmt_Id
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Last_Elmt (Elist_Id List)
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{
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return Elists_Ptr[List - First_Elist_Id].last;
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}
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INLINE Elmt_Id
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Next_Elmt (Elmt_Id Node)
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{
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Int N = Elmts_Ptr[Node - First_Elmt_Id].next;
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if (IN (N, Elist_Range))
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return No_Elmt;
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else
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return N;
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}
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INLINE Boolean
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Is_Empty_Elmt_List (Elist_Id Id)
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{
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return Elists_Ptr[Id - First_Elist_Id].first == No_Elmt;
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}
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