gcc/ada/uintp.h

   1 /****************************************************************************
   2  *                                                                          *
   3  *                         GNAT COMPILER COMPONENTS                         *
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   5  *                                U I N T P                                 *
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  26  ****************************************************************************/
  27
  28 /* This file corresponds to the Ada package specification Uintp. It was
  29    created manually from the files uintp.ads and uintp.adb  */
  30
  31 /* Support for universal integer arithmetic */
  32
  33 struct Uint_Entry
  34 {
  35   Pos Length;
  36   Int Loc;
  37 };
  38
  39 /* See if a Uint is within the range of an integer.  */
  40 #define UI_Is_In_Int_Range  uintp__ui_is_in_int_range
  41 extern Boolean UI_Is_In_Int_Range       PARAMS((Uint));
  42
  43 /* Obtain Int value from Uint input. This will abort if the result is
  44    out of range.  */
  45 #define UI_To_Int uintp__ui_to_int
  46 extern Int UI_To_Int                    PARAMS((Uint));
  47
  48 /* Convert an Int into a Uint.  */
  49 #define UI_From_Int uintp__ui_from_int
  50 extern Uint UI_From_Int                 PARAMS((int));
  51
  52 /* Similarly, but return a GCC INTEGER_CST.  Overflow is tested by the
  53    constant-folding used to build the node.  TYPE is the GCC type of the
  54    resulting node.  */
  55 extern tree UI_To_gnu                   PARAMS((Uint, tree));
  56
  57 /* Universal integers are represented by the Uint type which is an index into
  58    the Uints_Ptr table containing Uint_Entry values.  A Uint_Entry contains an
  59    index and length for getting the "digits" of the universal integer from the
  60    Udigits_Ptr table.
  61
  62    For efficiency, this method is used only for integer values larger than the
  63    constant Uint_Bias.  If a Uint is less than this constant, then it contains
  64    the integer value itself.  The origin of the Uints_Ptr table is adjusted so
  65    that a Uint value of Uint_Bias indexes the first element.  */
  66
  67 #define Uints_Ptr (uintp__uints__table - Uint_Table_Start)
  68 extern struct Uint_Entry *uintp__uints__table;
  69
  70 #define Udigits_Ptr uintp__udigits__table
  71 extern int *uintp__udigits__table;
  72
  73 #define Uint_0 (Uint_Direct_Bias + 0)
  74 #define Uint_1 (Uint_Direct_Bias + 1)