gcc/ada/uintp.h

   1 /****************************************************************************
   2  *                                                                          *
   3  *                         GNAT COMPILER COMPONENTS                         *
   4  *                                                                          *
   5  *                                U I N T P                                 *
   6  *                                                                          *
   7  *                              C Header File                               *
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   9  *            Copyright (C) 1992-2007, Free Software Foundation, Inc.       *
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  11  * GNAT is free software;  you can  redistribute it  and/or modify it under *
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  20  *                                                                          *
  21  * GNAT was originally developed  by the GNAT team at  New York University. *
  22  * Extensive contributions were provided by Ada Core Technologies Inc.      *
  23  *                                                                          *
  24  ****************************************************************************/
  25
  26 /* This file corresponds to the Ada package specification Uintp. It was
  27    created manually from the files uintp.ads and uintp.adb  */
  28
  29 /* Support for universal integer arithmetic */
  30
  31 struct Uint_Entry
  32 {
  33   Pos Length;
  34   Int Loc;
  35 };
  36
  37 /* See if a Uint is within the range of an integer.  */
  38 #define UI_Is_In_Int_Range  uintp__ui_is_in_int_range
  39 extern Boolean UI_Is_In_Int_Range       (Uint);
  40
  41 /* Obtain Char_Code value from Uint input. Value must be in range.  */
  42 #define UI_To_CC uintp__ui_to_cc
  43 extern Char_Code UI_To_CC               (Uint);
  44
  45 /* Obtain Int value from Uint input. This will abort if the result is
  46    out of range.  */
  47 #define UI_To_Int uintp__ui_to_int
  48 extern Int UI_To_Int                    (Uint);
  49
  50 /* Convert an Int into a Uint.  */
  51 #define UI_From_Int uintp__ui_from_int
  52 extern Uint UI_From_Int                 (int);
  53
  54 /* Convert a Char_Code into a Uint.  */
  55 #define UI_From_CC uintp__ui_from_cc
  56 extern Uint UI_From_CC                  (Char_Code);
  57
  58 /* Similarly, but return a GCC INTEGER_CST.  Overflow is tested by the
  59    constant-folding used to build the node.  TYPE is the GCC type of the
  60    resulting node.  */
  61 extern tree UI_To_gnu                   (Uint, tree);
  62
  63 /* Universal integers are represented by the Uint type which is an index into
  64    the Uints_Ptr table containing Uint_Entry values.  A Uint_Entry contains an
  65    index and length for getting the "digits" of the universal integer from the
  66    Udigits_Ptr table.
  67
  68    For efficiency, this method is used only for integer values larger than the
  69    constant Uint_Bias.  If a Uint is less than this constant, then it contains
  70    the integer value itself.  The origin of the Uints_Ptr table is adjusted so
  71    that a Uint value of Uint_Bias indexes the first element.  */
  72
  73 #define Uints_Ptr (uintp__uints__table - Uint_Table_Start)
  74 extern struct Uint_Entry *uintp__uints__table;
  75
  76 #define Udigits_Ptr uintp__udigits__table
  77 extern int *uintp__udigits__table;
  78
  79 #define Uint_0 (Uint_Direct_Bias + 0)
  80 #define Uint_1 (Uint_Direct_Bias + 1)