projects / thirdparty / gcc.git / blame
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1 | /**************************************************************************** |
| 2 | * * | |
| 3 | * GNAT COMPILER COMPONENTS * | |
| 4 | * * | |
| 5 | * U I N T P * | |
| 6 | * * | |
| 7 | * C Header File * | |
| 8 | * * | |
| fbf5a39b | 9 | * Copyright (C) 1992-2002, Free Software Foundation, Inc. * |
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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. * | |
| 71ff80dc | 23 | * Extensive contributions were provided by Ada Core Technologies Inc. * |
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24 | * * |
| 25 | ****************************************************************************/ | |
| 26 | ||
| 27 | /* This file corresponds to the Ada package specification Uintp. It was | |
| 28 | created manually from the files uintp.ads and uintp.adb */ | |
| 29 | ||
| 30 | /* Support for universal integer arithmetic */ | |
| 31 | ||
| 32 | struct Uint_Entry | |
| 33 | { | |
| 34 | Pos Length; | |
| 35 | Int Loc; | |
| 36 | }; | |
| 37 | ||
| 38 | /* See if a Uint is within the range of an integer. */ | |
| 39 | #define UI_Is_In_Int_Range uintp__ui_is_in_int_range | |
| fbf5a39b | 40 | extern Boolean UI_Is_In_Int_Range (Uint); |
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41 | |
| 42 | /* Obtain Int value from Uint input. This will abort if the result is | |
| 43 | out of range. */ | |
| 44 | #define UI_To_Int uintp__ui_to_int | |
| fbf5a39b | 45 | extern Int UI_To_Int (Uint); |
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46 | |
| 47 | /* Convert an Int into a Uint. */ | |
| 48 | #define UI_From_Int uintp__ui_from_int | |
| fbf5a39b | 49 | extern Uint UI_From_Int (int); |
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50 | |
| 51 | /* Similarly, but return a GCC INTEGER_CST. Overflow is tested by the | |
| 52 | constant-folding used to build the node. TYPE is the GCC type of the | |
| 53 | resulting node. */ | |
| fbf5a39b | 54 | extern tree UI_To_gnu (Uint, tree); |
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55 | |
| 56 | /* Universal integers are represented by the Uint type which is an index into | |
| 57 | the Uints_Ptr table containing Uint_Entry values. A Uint_Entry contains an | |
| 58 | index and length for getting the "digits" of the universal integer from the | |
| 59 | Udigits_Ptr table. | |
| 60 | ||
| 61 | For efficiency, this method is used only for integer values larger than the | |
| 62 | constant Uint_Bias. If a Uint is less than this constant, then it contains | |
| 63 | the integer value itself. The origin of the Uints_Ptr table is adjusted so | |
| 64 | that a Uint value of Uint_Bias indexes the first element. */ | |
| 65 | ||
| 66 | #define Uints_Ptr (uintp__uints__table - Uint_Table_Start) | |
| 67 | extern struct Uint_Entry *uintp__uints__table; | |
| 68 | ||
| 69 | #define Udigits_Ptr uintp__udigits__table | |
| 70 | extern int *uintp__udigits__table; | |
| 71 | ||
| 72 | #define Uint_0 (Uint_Direct_Bias + 0) | |
| 73 | #define Uint_1 (Uint_Direct_Bias + 1) |