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annotate Include/intobject.h @ 5817:48b94de85bf3 legacy-trunk

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Extensive changes by AMK.
author Guido van Rossum <guido@python.org>
date Thu, 17 Jul 1997 16:29:42 +0000
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1 #ifndef Py_INTOBJECT_H
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2 #define Py_INTOBJECT_H
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3 #ifdef __cplusplus
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4 extern "C" {
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5 #endif
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6
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7 /***********************************************************
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8 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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9 The Netherlands.
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10
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11 All Rights Reserved
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12
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13 Permission to use, copy, modify, and distribute this software and its
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14 documentation for any purpose and without fee is hereby granted,
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15 provided that the above copyright notice appear in all copies and that
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16 both that copyright notice and this permission notice appear in
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17 supporting documentation, and that the names of Stichting Mathematisch
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18 Centrum or CWI or Corporation for National Research Initiatives or
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19 CNRI not be used in advertising or publicity pertaining to
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20 distribution of the software without specific, written prior
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21 permission.
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22
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23 While CWI is the initial source for this software, a modified version
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24 is made available by the Corporation for National Research Initiatives
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25 (CNRI) at the Internet address ftp://ftp.python.org.
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26
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27 STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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28 REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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29 MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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30 CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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31 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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32 PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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33 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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34 PERFORMANCE OF THIS SOFTWARE.
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35
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36 ******************************************************************/
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37
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38 /* Integer object interface */
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39
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40 /*
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41 123456789-123456789-123456789-123456789-123456789-123456789-123456789-12
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42
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43 PyIntObject represents a (long) integer. This is an immutable object;
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44 an integer cannot change its value after creation.
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45
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46 There are functions to create new integer objects, to test an object
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47 for integer-ness, and to get the integer value. The latter functions
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48 returns -1 and sets errno to EBADF if the object is not an PyIntObject.
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49 None of the functions should be applied to nil objects.
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51 The type PyIntObject is (unfortunately) exposed here so we can declare
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52 _Py_TrueStruct and _Py_ZeroStruct below; don't use this.
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53 */
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54
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55 typedef struct {
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56 PyObject_HEAD
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57 long ob_ival;
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58 } PyIntObject;
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59
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60 extern DL_IMPORT(PyTypeObject) PyInt_Type;
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61
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62 #define PyInt_Check(op) ((op)->ob_type == &PyInt_Type)
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63
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64 extern PyObject *PyInt_FromLong Py_PROTO((long));
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65 extern long PyInt_AsLong Py_PROTO((PyObject *));
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68 /*
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69 123456789-123456789-123456789-123456789-123456789-123456789-123456789-12
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71 False and True are special intobjects used by Boolean expressions.
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72 All values of type Boolean must point to either of these; but in
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73 contexts where integers are required they are integers (valued 0 and 1).
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74 Hope these macros don't conflict with other people's.
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75
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76 Don't forget to apply Py_INCREF() when returning True or False!!!
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77 */
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78
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79 extern DL_IMPORT(PyIntObject) _Py_ZeroStruct, _Py_TrueStruct; /* Don't use these directly */
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80
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81 #define Py_False ((PyObject *) &_Py_ZeroStruct)
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82 #define Py_True ((PyObject *) &_Py_TrueStruct)
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84 /* Macro, trading safety for speed */
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85 #define PyInt_AS_LONG(op) ((op)->ob_ival)
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87 #ifdef __cplusplus
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88 }
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89 #endif
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90 #endif /* !Py_INTOBJECT_H */