| Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame^] | 1 | /*********************************************************** |
| 2 | Copyright 1991 by Stichting Mathematisch Centrum, Amsterdam, The |
| 3 | Netherlands. |
| 4 | |
| 5 | All Rights Reserved |
| 6 | |
| 7 | Permission to use, copy, modify, and distribute this software and its |
| 8 | documentation for any purpose and without fee is hereby granted, |
| 9 | provided that the above copyright notice appear in all copies and that |
| 10 | both that copyright notice and this permission notice appear in |
| 11 | supporting documentation, and that the names of Stichting Mathematisch |
| 12 | Centrum or CWI not be used in advertising or publicity pertaining to |
| 13 | distribution of the software without specific, written prior permission. |
| 14 | |
| 15 | STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO |
| 16 | THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| 17 | FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE |
| 18 | FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 19 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 20 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT |
| 21 | OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 22 | |
| 23 | ******************************************************************/ |
| 24 | |
| Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 25 | /* Integer object interface */ |
| 26 | |
| 27 | /* |
| 28 | 123456789-123456789-123456789-123456789-123456789-123456789-123456789-12 |
| 29 | |
| 30 | intobject represents a (long) integer. This is an immutable object; |
| 31 | an integer cannot change its value after creation. |
| 32 | |
| 33 | There are functions to create new integer objects, to test an object |
| 34 | for integer-ness, and to get the integer value. The latter functions |
| 35 | returns -1 and sets errno to EBADF if the object is not an intobject. |
| 36 | None of the functions should be applied to nil objects. |
| 37 | |
| 38 | The type intobject is (unfortunately) exposed bere so we can declare |
| 39 | TrueObject and FalseObject below; don't use this. |
| 40 | */ |
| 41 | |
| 42 | typedef struct { |
| 43 | OB_HEAD |
| 44 | long ob_ival; |
| 45 | } intobject; |
| 46 | |
| 47 | extern typeobject Inttype; |
| 48 | |
| 49 | #define is_intobject(op) ((op)->ob_type == &Inttype) |
| 50 | |
| 51 | extern object *newintobject PROTO((long)); |
| 52 | extern long getintvalue PROTO((object *)); |
| 53 | |
| 54 | |
| 55 | /* |
| 56 | 123456789-123456789-123456789-123456789-123456789-123456789-123456789-12 |
| 57 | |
| 58 | False and True are special intobjects used by Boolean expressions. |
| 59 | All values of type Boolean must point to either of these; but in |
| 60 | contexts where integers are required they are integers (valued 0 and 1). |
| 61 | Hope these macros don't conflict with other people's. |
| 62 | |
| 63 | Don't forget to apply INCREF() when returning True or False!!! |
| 64 | */ |
| 65 | |
| 66 | extern intobject FalseObject, TrueObject; /* Don't use these directly */ |
| 67 | |
| 68 | #define False ((object *) &FalseObject) |
| 69 | #define True ((object *) &TrueObject) |
| 70 | |
| 71 | /* Macro, trading safety for speed */ |
| 72 | #define GETINTVALUE(op) ((op)->ob_ival) |