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annotate Include/code.h @ 70987:c5b0585624ef

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map cells to arg slots at code creation time (closes #12399) This removes nested loops in PyEval_EvalCodeEx.
author Benjamin Peterson <benjamin@python.org>
date Sat, 25 Jun 2011 22:54:45 -0500
parents 3c9232a684ae
children
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1 /* Definitions for bytecode */
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2
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3 #ifndef Py_LIMITED_API
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4 #ifndef Py_CODE_H
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5 #define Py_CODE_H
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6 #ifdef __cplusplus
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7 extern "C" {
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8 #endif
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9
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10 /* Bytecode object */
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11 typedef struct {
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12 PyObject_HEAD
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13 int co_argcount; /* #arguments, except *args */
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14 int co_kwonlyargcount; /* #keyword only arguments */
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15 int co_nlocals; /* #local variables */
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16 int co_stacksize; /* #entries needed for evaluation stack */
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17 int co_flags; /* CO_..., see below */
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18 PyObject *co_code; /* instruction opcodes */
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19 PyObject *co_consts; /* list (constants used) */
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20 PyObject *co_names; /* list of strings (names used) */
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21 PyObject *co_varnames; /* tuple of strings (local variable names) */
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22 PyObject *co_freevars; /* tuple of strings (free variable names) */
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23 PyObject *co_cellvars; /* tuple of strings (cell variable names) */
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24 /* The rest doesn't count for hash or comparisons */
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25 unsigned char *co_cell2arg; /* Maps cell vars which are arguments. */
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26 PyObject *co_filename; /* unicode (where it was loaded from) */
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27 PyObject *co_name; /* unicode (name, for reference) */
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28 int co_firstlineno; /* first source line number */
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29 PyObject *co_lnotab; /* string (encoding addr<->lineno mapping) See
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30 Objects/lnotab_notes.txt for details. */
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31 void *co_zombieframe; /* for optimization only (see frameobject.c) */
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32 PyObject *co_weakreflist; /* to support weakrefs to code objects */
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33 } PyCodeObject;
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34
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35 /* Masks for co_flags above */
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36 #define CO_OPTIMIZED 0x0001
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37 #define CO_NEWLOCALS 0x0002
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38 #define CO_VARARGS 0x0004
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39 #define CO_VARKEYWORDS 0x0008
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40 #define CO_NESTED 0x0010
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41 #define CO_GENERATOR 0x0020
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42 /* The CO_NOFREE flag is set if there are no free or cell variables.
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43 This information is redundant, but it allows a single flag test
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44 to determine whether there is any extra work to be done when the
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45 call frame it setup.
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46 */
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47 #define CO_NOFREE 0x0040
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48
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49 /* These are no longer used. */
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50 #if 0
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51 #define CO_GENERATOR_ALLOWED 0x1000
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52 #endif
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53 #define CO_FUTURE_DIVISION 0x2000
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54 #define CO_FUTURE_ABSOLUTE_IMPORT 0x4000 /* do absolute imports by default */
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55 #define CO_FUTURE_WITH_STATEMENT 0x8000
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56 #define CO_FUTURE_PRINT_FUNCTION 0x10000
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57 #define CO_FUTURE_UNICODE_LITERALS 0x20000
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58
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59 #define CO_FUTURE_BARRY_AS_BDFL 0x40000
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60
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61 /* This value is found in the co_cell2arg array when the associated cell
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62 variable does not correspond to an argument. The maximum number of
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63 arguments is 255 (indexed up to 254), so 255 work as a special flag.*/
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64 #define CO_CELL_NOT_AN_ARG 255
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65
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66 /* This should be defined if a future statement modifies the syntax.
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67 For example, when a keyword is added.
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68 */
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69 #define PY_PARSER_REQUIRES_FUTURE_KEYWORD
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70
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71 #define CO_MAXBLOCKS 20 /* Max static block nesting within a function */
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72
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73 PyAPI_DATA(PyTypeObject) PyCode_Type;
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74
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75 #define PyCode_Check(op) (Py_TYPE(op) == &PyCode_Type)
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76 #define PyCode_GetNumFree(op) (PyTuple_GET_SIZE((op)->co_freevars))
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77
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78 /* Public interface */
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79 PyAPI_FUNC(PyCodeObject *) PyCode_New(
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80 int, int, int, int, int, PyObject *, PyObject *,
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81 PyObject *, PyObject *, PyObject *, PyObject *,
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82 PyObject *, PyObject *, int, PyObject *);
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83 /* same as struct above */
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84
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85 /* Creates a new empty code object with the specified source location. */
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86 PyAPI_FUNC(PyCodeObject *)
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87 PyCode_NewEmpty(const char *filename, const char *funcname, int firstlineno);
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88
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89 /* Return the line number associated with the specified bytecode index
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90 in this code object. If you just need the line number of a frame,
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91 use PyFrame_GetLineNumber() instead. */
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92 PyAPI_FUNC(int) PyCode_Addr2Line(PyCodeObject *, int);
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93
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94 /* for internal use only */
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95 typedef struct _addr_pair {
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96 int ap_lower;
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97 int ap_upper;
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98 } PyAddrPair;
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99
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100 /* Update *bounds to describe the first and one-past-the-last instructions in the
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101 same line as lasti. Return the number of that line.
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102 */
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103 #ifndef Py_LIMITED_API
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104 PyAPI_FUNC(int) _PyCode_CheckLineNumber(PyCodeObject* co,
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105 int lasti, PyAddrPair *bounds);
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106 #endif
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107
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108 PyAPI_FUNC(PyObject*) PyCode_Optimize(PyObject *code, PyObject* consts,
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109 PyObject *names, PyObject *lineno_obj);
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110
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111 #ifdef __cplusplus
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112 }
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113 #endif
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114 #endif /* !Py_CODE_H */
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115 #endif /* Py_LIMITED_API */