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1 /****************************************************************************
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2 * *
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3 * GNAT COMPILER COMPONENTS *
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4 * *
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5 * U I N T P *
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6 * *
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7 * C Header File *
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8 * *
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145
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9 * Copyright (C) 1992-2019, Free Software Foundation, Inc. *
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111
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10 * *
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11 * GNAT is free software; you can redistribute it and/or modify it under *
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12 * terms of the GNU General Public License as published by the Free Soft- *
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13 * ware Foundation; either version 3, or (at your option) any later ver- *
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14 * sion. GNAT is distributed in the hope that it will be useful, but WITH- *
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15 * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
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16 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License *
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17 * for more details. You should have received a copy of the GNU General *
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18 * Public License distributed with GNAT; see file COPYING3. If not, go to *
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19 * http://www.gnu.org/licenses for a complete copy of the license. *
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20 * *
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21 * GNAT was originally developed by the GNAT team at New York University. *
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22 * Extensive contributions were provided by Ada Core Technologies Inc. *
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23 * *
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24 ****************************************************************************/
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25
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26 /* This is the C header that corresponds to the Ada package specification for
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27 Uintp. It was created manually from uintp.ads and must be kept synchronized
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28 with changes in this file. */
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111
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29
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30 #ifdef __cplusplus
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31 extern "C" {
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32 #endif
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33
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34 /* Support for universal integer arithmetic */
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35
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36 struct Uint_Entry
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37 {
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38 Pos Length;
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39 Int Loc;
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40 };
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41
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42 /* See if a Uint is within the range of an integer. */
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43 #define UI_Is_In_Int_Range uintp__ui_is_in_int_range
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44 extern Boolean UI_Is_In_Int_Range (Uint);
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45
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46 /* Obtain Char_Code value from Uint input. Value must be in range. */
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47 #define UI_To_CC uintp__ui_to_cc
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48 extern Char_Code UI_To_CC (Uint);
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49
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50 /* Convert a Char_Code into a Uint. */
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51 #define UI_From_CC uintp__ui_from_cc
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52 extern Uint UI_From_CC (Char_Code);
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53
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54 /* Obtain Int value from Uint input. Abort if the result is out of range. */
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55 #define UI_To_Int uintp__ui_to_int
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56 extern Int UI_To_Int (Uint);
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57
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58 /* Similarly, but return a GCC INTEGER_CST. */
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59 extern tree UI_To_gnu (Uint, tree);
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60
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61 /* Convert an Int into a Uint. */
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62 #define UI_From_Int uintp__ui_from_int
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63 extern Uint UI_From_Int (int);
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64
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65 /* Similarly, but take a GCC INTEGER_CST. */
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66 extern Uint UI_From_gnu (tree);
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67
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68 /* A constant value indicating a missing or unset Uint value. */
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69 #define UI_No_Uint uintp__no_uint
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70 extern const Uint UI_No_Uint;
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71
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72 /* Uint values are represented as multiple precision integers stored in a
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73 multi-digit format using UI_Base as the base. This value is chosen so
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74 that the product UI_Base*UI_Base is within the range of Int values. */
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75 #define UI_Base uintp__base
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76 extern const int UI_Base;
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77
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78 /* Types for the fat pointer of Int vectors and the template it points to. */
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79 typedef struct {int Low_Bound, High_Bound; } Vector_Template;
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80 typedef struct {const int *Array; Vector_Template *Bounds; }
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81 __attribute ((aligned (sizeof (char *) * 2))) Int_Vector;
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82
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83 /* Create and return the Uint value from the Int vector. */
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84 #define Vector_To_Uint uintp__vector_to_uint
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85 extern Uint Vector_To_Uint (Int_Vector, Boolean);
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86
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87 /* Compare integer values for equality. */
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88 #define UI_Eq uintp__ui_eq
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89 extern Boolean UI_Eq (Uint, Uint);
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90
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91 /* Compare integer values for less than. */
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92 #define UI_Lt uintp__ui_lt
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93 extern Boolean UI_Lt (Uint, Uint);
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94
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95 /* Universal integers are represented by the Uint type which is an index into
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96 the Uints_Ptr table containing Uint_Entry values. A Uint_Entry contains an
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97 index and length for getting the "digits" of the universal integer from the
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98 Udigits_Ptr table.
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99
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100 For efficiency, this method is used only for integer values larger than the
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101 constant Uint_Bias. If a Uint is less than this constant, then it contains
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102 the integer value itself. The origin of the Uints_Ptr table is adjusted so
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103 that a Uint value of Uint_Bias indexes the first element. */
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104
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105 #define Uints_Ptr (uintp__uints__table - Uint_Table_Start)
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106 extern struct Uint_Entry *uintp__uints__table;
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107
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108 #define Udigits_Ptr uintp__udigits__table
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109 extern int *uintp__udigits__table;
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110
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111 #ifdef __cplusplus
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112 }
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113 #endif
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