gcc/ada/nlists.h

   1 /****************************************************************************
   2  *                                                                          *
   3  *                         GNAT COMPILER COMPONENTS                         *
   4  *                                                                          *
   5  *                               N L I S T S                                *
   6  *                                                                          *
   7  *                              C Header File                               *
   8  *                                                                          *
   9  *          Copyright (C) 1992-2003, Free Software Foundation, Inc.         *
  10  *                                                                          *
  11  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  12  * terms of the  GNU General Public License as published  by the Free Soft- *
  13  * ware  Foundation;  either version 2,  or (at your option) any later ver- *
  14  * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
  15  * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
  16  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License *
  17  * for  more details.  You should have  received  a copy of the GNU General *
  18  * Public License  distributed with GNAT;  see file COPYING.  If not, write *
  19  * to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, *
  20  * MA 02111-1307, USA.                                                      *
  21  *                                                                          *
  22  * GNAT was originally developed  by the GNAT team at  New York University. *
  23  * Extensive contributions were provided by Ada Core Technologies Inc.      *
  24  *                                                                          *
  25  ****************************************************************************/
  26
  27 /* This is the C header corresponding to the Ada package specification for
  28    Nlists. It also contains the implementations of inlined functions from the
  29    the package body for Nlists.  It was generated manually from nlists.ads and
  30    nlists.adb and must be kept synchronized with changes in these files.
  31
  32    Note that only routines for reading the tree are included, since the
  33    tree transformer is not supposed to modify the tree in any way. */
  34
  35 /*  The following is the structure used for the list headers table */
  36
  37 struct List_Header
  38 {
  39   Node_Id first;
  40   Node_Id last;
  41   Node_Id parent;
  42 };
  43
  44 /* The list headers are stored in an array.  The pointer to this array is
  45    passed as a parameter to gigi and stored in the global variable
  46    List_Headers_Ptr.  */
  47
  48 extern struct List_Header *List_Headers_Ptr;
  49
  50 /* The previous and next links for lists are held in two arrays, Next_Node and
  51    Prev_Node.  The pointers to these arrays are passed as parameters to gigi
  52    and stored in the global variables Prev_Node_Ptr and Next_Node_Ptr.  */
  53
  54 extern Node_Id *Next_Node_Ptr;
  55 extern Node_Id *Prev_Node_Ptr;
  56
  57 /* Node List Access Functions */
  58
  59 static Node_Id First (List_Id);
  60
  61 INLINE Node_Id
  62 First (List_Id List)
  63 {
  64   return List_Headers_Ptr[List - First_List_Id].first;
  65 }
  66
  67 #define First_Non_Pragma nlists__first_non_pragma
  68 extern Node_Id First_Non_Pragma (Node_Id);
  69
  70 static Node_Id Last (List_Id);
  71
  72 INLINE Node_Id
  73 Last (List_Id List)
  74 {
  75   return List_Headers_Ptr[List - First_List_Id].last;
  76 }
  77
  78 #define First_Non_Pragma nlists__first_non_pragma
  79 extern Node_Id First_Non_Pragma (List_Id);
  80
  81 static Node_Id Next (Node_Id);
  82
  83 INLINE Node_Id
  84 Next (Node_Id Node)
  85 {
  86   return Next_Node_Ptr[Node - First_Node_Id];
  87 }
  88
  89 #define Next_Non_Pragma nlists__next_non_pragma
  90 extern Node_Id Next_Non_Pragma (List_Id);
  91
  92 static Node_Id Prev (Node_Id);
  93
  94 INLINE Node_Id
  95 Prev (Node_Id Node)
  96 {
  97   return Prev_Node_Ptr[Node - First_Node_Id];
  98 }
  99
 100
 101 #define Prev_Non_Pragma nlists__prev_non_pragma
 102 extern Node_Id Prev_Non_Pragma          (Node_Id);
 103
 104 static Boolean Is_Empty_List            (List_Id);
 105 static Boolean Is_Non_Empty_List        (List_Id);
 106 static Boolean Is_List_Member           (Node_Id);
 107 static List_Id List_Containing          (Node_Id);
 108
 109 INLINE Boolean
 110 Is_Empty_List (List_Id Id)
 111 {
 112   return (First (Id) == Empty);
 113 }
 114
 115 INLINE Boolean
 116 Is_Non_Empty_List (List_Id Id)
 117 {
 118   return (Present (Id) && First (Id) != Empty);
 119 }
 120
 121 INLINE Boolean
 122 Is_List_Member (Node_Id Node)
 123 {
 124   return Nodes_Ptr[Node - First_Node_Id].U.K.in_list;
 125 }
 126
 127 INLINE List_Id
 128 List_Containing (Node_Id Node)
 129 {
 130   return Nodes_Ptr[Node - First_Node_Id].V.NX.link;
 131 }