Mercurial > cpython-lru_cache-weakref

annotate Modules/_opcode.c @ 87470:78ec18f5cb45

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Issue #19674: inspect.signature() now produces a correct signature for some builtins.
author Larry Hastings <larry@hastings.org>
date Sat, 23 Nov 2013 15:37:55 -0800
parents 5fe72b9ed48e
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #include "Python.h"
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2 #include "opcode.h"
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3
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4 /*[clinic]
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5 module _opcode
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6 [clinic]*/
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7 /*[clinic checksum: da39a3ee5e6b4b0d3255bfef95601890afd80709]*/
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8
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9 /*[clinic]
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10
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11 _opcode.stack_effect -> int
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12
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13 opcode: int
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14
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15 [
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16 oparg: int
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17 ]
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18 /
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19
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20 Compute the stack effect of the opcode.
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21 [clinic]*/
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22
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23 PyDoc_STRVAR(_opcode_stack_effect__doc__,
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24 "stack_effect(opcode, [oparg])\n"
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25 "Compute the stack effect of the opcode.");
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26
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27 #define _OPCODE_STACK_EFFECT_METHODDEF \
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28 {"stack_effect", (PyCFunction)_opcode_stack_effect, METH_VARARGS, _opcode_stack_effect__doc__},
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29
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30 static int
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31 _opcode_stack_effect_impl(PyModuleDef *module, int opcode, int group_right_1, int oparg);
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32
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33 static PyObject *
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34 _opcode_stack_effect(PyModuleDef *module, PyObject *args)
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35 {
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36 PyObject *return_value = NULL;
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37 int opcode;
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38 int group_right_1 = 0;
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39 int oparg = 0;
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40 int _return_value;
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41
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42 switch (PyTuple_Size(args)) {
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43 case 1:
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44 if (!PyArg_ParseTuple(args, "i:stack_effect", &opcode))
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45 return NULL;
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46 break;
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47 case 2:
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48 if (!PyArg_ParseTuple(args, "ii:stack_effect", &opcode, &oparg))
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49 return NULL;
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50 group_right_1 = 1;
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51 break;
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52 default:
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53 PyErr_SetString(PyExc_TypeError, "_opcode.stack_effect requires 1 to 2 arguments");
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54 return NULL;
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55 }
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56 _return_value = _opcode_stack_effect_impl(module, opcode, group_right_1, oparg);
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57 if ((_return_value == -1) && PyErr_Occurred())
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58 goto exit;
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59 return_value = PyLong_FromLong((long)_return_value);
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60
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61 exit:
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62 return return_value;
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63 }
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64
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65 static int
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66 _opcode_stack_effect_impl(PyModuleDef *module, int opcode, int group_right_1, int oparg)
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67 /*[clinic checksum: e880e62dc7b0de73403026eaf4f8074aa106358b]*/
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68 {
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69 int effect;
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70 if (HAS_ARG(opcode)) {
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71 if (!group_right_1) {
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72 PyErr_SetString(PyExc_ValueError,
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73 "stack_effect: opcode requires oparg but oparg was not specified");
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74 return -1;
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75 }
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76 }
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77 else if (group_right_1) {
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78 PyErr_SetString(PyExc_ValueError,
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79 "stack_effect: opcode does not permit oparg but oparg was specified");
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80 return -1;
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81 }
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82 effect = PyCompile_OpcodeStackEffect(opcode, oparg);
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83 if (effect == PY_INVALID_STACK_EFFECT) {
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84 PyErr_SetString(PyExc_ValueError,
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85 "invalid opcode or oparg");
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86 return -1;
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87 }
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88 return effect;
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89 }
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90
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91
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92
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93
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94 static PyMethodDef
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95 opcode_functions[] = {
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96 _OPCODE_STACK_EFFECT_METHODDEF
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97 {NULL, NULL, 0, NULL}
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98 };
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99
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100
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101 static struct PyModuleDef opcodemodule = {
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102 PyModuleDef_HEAD_INIT,
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103 "_opcode",
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104 "Opcode support module.",
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105 -1,
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106 opcode_functions,
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107 NULL,
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108 NULL,
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109 NULL,
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110 NULL
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111 };
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112
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113 PyMODINIT_FUNC
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114 PyInit__opcode(void)
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115 {
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116 return PyModule_Create(&opcodemodule);
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117 }