projects / thirdparty / gcc.git / blame
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|---|---|---|
| cacbc350 RK |
1 | ------------------------------------------------------------------------------ |
| 2 | -- -- | |
| 3 | -- GNAT COMPILER COMPONENTS -- | |
| 4 | -- -- | |
| 5 | -- S Y S T E M . V A L _ L L I -- | |
| 6 | -- -- | |
| 84fdd8a3 | 7 | -- B o d y -- |
| cacbc350 | 8 | -- -- |
| 748086b7 | 9 | -- Copyright (C) 1992-2009, Free Software Foundation, Inc. -- |
| cacbc350 RK |
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- -- | |
| 748086b7 | 13 | -- ware Foundation; either version 3, or (at your option) any later ver- -- |
| cacbc350 RK |
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 -- | |
| 748086b7 JJ |
16 | -- or FITNESS FOR A PARTICULAR PURPOSE. -- |
| 17 | -- -- | |
| 18 | -- As a special exception under Section 7 of GPL version 3, you are granted -- | |
| 19 | -- additional permissions described in the GCC Runtime Library Exception, -- | |
| 20 | -- version 3.1, as published by the Free Software Foundation. -- | |
| 21 | -- -- | |
| 22 | -- You should have received a copy of the GNU General Public License and -- | |
| 23 | -- a copy of the GCC Runtime Library Exception along with this program; -- | |
| 24 | -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- | |
| 25 | -- <http://www.gnu.org/licenses/>. -- | |
| cacbc350 RK |
26 | -- -- |
| 27 | -- GNAT was originally developed by the GNAT team at New York University. -- | |
| 71ff80dc | 28 | -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
| cacbc350 RK |
29 | -- -- |
| 30 | ------------------------------------------------------------------------------ | |
| 31 | ||
| 32 | with System.Unsigned_Types; use System.Unsigned_Types; | |
| 33 | with System.Val_LLU; use System.Val_LLU; | |
| 34 | with System.Val_Util; use System.Val_Util; | |
| 35 | ||
| 36 | package body System.Val_LLI is | |
| 37 | ||
| bfe7c10c BD |
38 | ---------------------------- |
| 39 | -- Scan_Long_Long_Integer -- | |
| 40 | ---------------------------- | |
| cacbc350 RK |
41 | |
| 42 | function Scan_Long_Long_Integer | |
| 43 | (Str : String; | |
| d90e94c7 | 44 | Ptr : not null access Integer; |
| 84fdd8a3 | 45 | Max : Integer) return Long_Long_Integer |
| cacbc350 RK |
46 | is |
| 47 | Uval : Long_Long_Unsigned; | |
| 48 | -- Unsigned result | |
| 49 | ||
| 50 | Minus : Boolean := False; | |
| 51 | -- Set to True if minus sign is present, otherwise to False | |
| 52 | ||
| 53 | Start : Positive; | |
| 54 | -- Saves location of first non-blank (not used in this case) | |
| 55 | ||
| 56 | begin | |
| 57 | Scan_Sign (Str, Ptr, Max, Minus, Start); | |
| bfe7c10c BD |
58 | |
| 59 | if Str (Ptr.all) not in '0' .. '9' then | |
| 60 | Ptr.all := Start; | |
| 61 | raise Constraint_Error; | |
| 62 | end if; | |
| 63 | ||
| 64 | Uval := Scan_Raw_Long_Long_Unsigned (Str, Ptr, Max); | |
| cacbc350 RK |
65 | |
| 66 | -- Deal with overflow cases, and also with maximum negative number | |
| 67 | ||
| 68 | if Uval > Long_Long_Unsigned (Long_Long_Integer'Last) then | |
| 69 | if Minus | |
| bfe7c10c BD |
70 | and then Uval = Long_Long_Unsigned (-(Long_Long_Integer'First)) |
| 71 | then | |
| cacbc350 RK |
72 | return Long_Long_Integer'First; |
| 73 | else | |
| 74 | raise Constraint_Error; | |
| 75 | end if; | |
| 76 | ||
| 77 | -- Negative values | |
| 78 | ||
| 79 | elsif Minus then | |
| 80 | return -(Long_Long_Integer (Uval)); | |
| 81 | ||
| 82 | -- Positive values | |
| 83 | ||
| 84 | else | |
| 85 | return Long_Long_Integer (Uval); | |
| 86 | end if; | |
| cacbc350 RK |
87 | end Scan_Long_Long_Integer; |
| 88 | ||
| 89 | ----------------------------- | |
| 90 | -- Value_Long_Long_Integer -- | |
| 91 | ----------------------------- | |
| 92 | ||
| 93 | function Value_Long_Long_Integer (Str : String) return Long_Long_Integer is | |
| 94 | V : Long_Long_Integer; | |
| 95 | P : aliased Integer := Str'First; | |
| cacbc350 RK |
96 | begin |
| 97 | V := Scan_Long_Long_Integer (Str, P'Access, Str'Last); | |
| 98 | Scan_Trailing_Blanks (Str, P); | |
| 99 | return V; | |
| cacbc350 RK |
100 | end Value_Long_Long_Integer; |
| 101 | ||
| 102 | end System.Val_LLI; |