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annotate Python/importdl.c @ 53787:c6376d3fa968

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Issue #5920: Changed format.__float__ and complex.__float__ to use a precision of 12 when using the empty presentation type. This more closely matches str()'s behavior and reduces surprises when adding alignment flags to an empty format string. Patch by Mark Dickinson.
author Eric Smith <eric@trueblade.com>
date Tue, 05 May 2009 14:04:18 +0000
parents 94f64f11fdd0
children cab14be0ada1
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1
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2 /* Support for dynamic loading of extension modules */
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3
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4 #include "Python.h"
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5
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6 /* ./configure sets HAVE_DYNAMIC_LOADING if dynamic loading of modules is
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7 supported on this platform. configure will then compile and link in one
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8 of the dynload_*.c files, as appropriate. We will call a function in
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9 those modules to get a function pointer to the module's init function.
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10 */
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11 #ifdef HAVE_DYNAMIC_LOADING
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12
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13 #include "importdl.h"
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15 extern dl_funcptr _PyImport_GetDynLoadFunc(const char *name,
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16 const char *shortname,
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17 const char *pathname, FILE *fp);
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21 PyObject *
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22 _PyImport_LoadDynamicModule(char *name, char *pathname, FILE *fp)
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23 {
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24 PyObject *m;
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25 PyObject *path;
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26 char *lastdot, *shortname, *packagecontext, *oldcontext;
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27 dl_funcptr p0;
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28 PyObject* (*p)(void);
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29 struct PyModuleDef *def;
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31 if ((m = _PyImport_FindExtension(name, pathname)) != NULL) {
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32 Py_INCREF(m);
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33 return m;
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34 }
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35 lastdot = strrchr(name, '.');
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36 if (lastdot == NULL) {
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37 packagecontext = NULL;
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38 shortname = name;
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39 }
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40 else {
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41 packagecontext = name;
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42 shortname = lastdot+1;
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43 }
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45 p0 = _PyImport_GetDynLoadFunc(name, shortname, pathname, fp);
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46 p = (PyObject*(*)(void))p0;
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47 if (PyErr_Occurred())
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48 return NULL;
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49 if (p == NULL) {
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50 PyErr_Format(PyExc_ImportError,
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51 "dynamic module does not define init function (PyInit_%.200s)",
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52 shortname);
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53 return NULL;
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54 }
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55 oldcontext = _Py_PackageContext;
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56 _Py_PackageContext = packagecontext;
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57 m = (*p)();
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58 _Py_PackageContext = oldcontext;
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59 if (m == NULL)
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60 return NULL;
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62 if (PyErr_Occurred()) {
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63 Py_DECREF(m);
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64 PyErr_Format(PyExc_SystemError,
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65 "initialization of %s raised unreported exception",
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66 shortname);
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67 return NULL;
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68 }
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70 /* Remember pointer to module init function. */
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71 def = PyModule_GetDef(m);
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72 def->m_base.m_init = p;
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73
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74 /* Remember the filename as the __file__ attribute */
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75 path = PyUnicode_DecodeFSDefault(pathname);
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76 if (PyModule_AddObject(m, "__file__", path) < 0)
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77 PyErr_Clear(); /* Not important enough to report */
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78
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79 if (_PyImport_FixupExtension(m, name, pathname) < 0)
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80 return NULL;
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81 if (Py_VerboseFlag)
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82 PySys_WriteStderr(
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83 "import %s # dynamically loaded from %s\n",
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84 name, pathname);
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85 return m;
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86 }
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88 #endif /* HAVE_DYNAMIC_LOADING */