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

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author Guido van Rossum <guido@python.org>
date Thu, 17 Jul 1997 16:29:42 +0000
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children 60fdb1db1175
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1 #ifndef Py_FRAMEOBJECT_H
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2 #define Py_FRAMEOBJECT_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 /* Frame object interface */
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39
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40 typedef struct {
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41 int b_type; /* what kind of block this is */
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42 int b_handler; /* where to jump to find handler */
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43 int b_level; /* value stack level to pop to */
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44 } PyTryBlock;
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45
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46 typedef struct _frame {
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47 PyObject_HEAD
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48 struct _frame *f_back; /* previous frame, or NULL */
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49 PyCodeObject *f_code; /* code segment */
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50 PyObject *f_builtins; /* builtin symbol table (PyDictObject) */
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51 PyObject *f_globals; /* global symbol table (PyDictObject) */
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52 PyObject *f_locals; /* local symbol table (PyDictObject) */
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53 PyObject **f_valuestack; /* points after the last local */
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54 PyObject *f_trace; /* Trace function */
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55 PyObject *f_exc_type, *f_exc_value, *f_exc_traceback;
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56 PyThreadState *f_tstate;
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57 int f_lasti; /* Last instruction if called */
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58 int f_lineno; /* Current line number */
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59 int f_restricted; /* Flag set if restricted operations
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60 in this scope */
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61 int f_iblock; /* index in f_blockstack */
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62 PyTryBlock f_blockstack[CO_MAXBLOCKS]; /* for try and loop blocks */
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63 int f_nlocals; /* number of locals */
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64 int f_stacksize; /* size of value stack */
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65 PyObject *f_localsplus[1]; /* locals+stack, dynamically sized */
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66 } PyFrameObject;
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68
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69 /* Standard object interface */
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70
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71 extern DL_IMPORT(PyTypeObject) PyFrame_Type;
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72
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73 #define PyFrame_Check(op) ((op)->ob_type == &PyFrame_Type)
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74
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75 PyFrameObject * PyFrame_New
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76 Py_PROTO((PyThreadState *, PyCodeObject *,
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77 PyObject *, PyObject *));
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80 /* The rest of the interface is specific for frame objects */
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81
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82 /* Tuple access macros */
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83
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84 #ifndef Py_DEBUG
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85 #define GETITEM(v, i) PyTuple_GET_ITEM((PyTupleObject *)(v), (i))
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86 #define GETITEMNAME(v, i) \
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87 PyString_AS_STRING((PyStringObject *)GETITEM((v), (i)))
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88 #else
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89 #define GETITEM(v, i) PyTuple_GetItem((v), (i))
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90 #define GETITEMNAME(v, i) PyString_AsString(GETITEM(v, i))
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91 #endif
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92
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93 #define GETUSTRINGVALUE(s) ((unsigned char *)PyString_AS_STRING(s))
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94
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95 /* Code access macros */
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96
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97 #define Getconst(f, i) (GETITEM((f)->f_code->co_consts, (i)))
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98 #define Getname(f, i) (GETITEMNAME((f)->f_code->co_names, (i)))
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99 #define Getnamev(f, i) (GETITEM((f)->f_code->co_names, (i)))
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101
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102 /* Block management functions */
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103
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104 void PyFrame_BlockSetup Py_PROTO((PyFrameObject *, int, int, int));
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105 PyTryBlock *PyFrame_BlockPop Py_PROTO((PyFrameObject *));
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107 /* Extend the value stack */
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108
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109 PyObject **PyFrame_ExtendStack Py_PROTO((PyFrameObject *, int, int));
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110
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111 /* Conversions between "fast locals" and locals in dictionary */
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112
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113 void PyFrame_LocalsToFast Py_PROTO((PyFrameObject *, int));
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114 void PyFrame_FastToLocals Py_PROTO((PyFrameObject *));
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115
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116 #ifdef __cplusplus
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117 }
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118 #endif
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119 #endif /* !Py_FRAMEOBJECT_H */