mirror of
https://github.com/python/cpython.git
synced 2024-11-30 18:51:15 +01:00
80a2a4ed7d
- Make case-swaps half the cost of any other edit - Refactor Levenshtein code to not use memory allocator, and to bail early on no match. - Add comments to Levenshtein distance code - Add test cases for Levenshtein distance behind a debug macro - Set threshold to `(name_size + item_size + 3) * MOVE_COST / 6`. - Reasoning: similar to `difflib.SequenceMatcher.ratio()` >= 2/3: ``` "Multiset Jaccard similarity" >= 2/3 matching letters / total letters >= 2/3 (name_size - distance + item_size - distance) / (name_size + item_size) >= 2/3 1 - (2*distance) / (name_size + item_size) >= 2/3 1/3 >= (2*distance) / (name_size + item_size) (name_size + item_size) / 6 >= distance With rounding: (name_size + item_size + 3) // 6 >= distance ``` Co-authored-by: Pablo Galindo <pablogsal@gmail.com>
97 lines
2.3 KiB
C
97 lines
2.3 KiB
C
#ifndef Py_INTERNAL_PYERRORS_H
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#define Py_INTERNAL_PYERRORS_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef Py_BUILD_CORE
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# error "this header requires Py_BUILD_CORE define"
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#endif
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static inline PyObject* _PyErr_Occurred(PyThreadState *tstate)
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{
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assert(tstate != NULL);
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return tstate->curexc_type;
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}
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static inline void _PyErr_ClearExcState(_PyErr_StackItem *exc_state)
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{
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PyObject *t, *v, *tb;
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t = exc_state->exc_type;
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v = exc_state->exc_value;
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tb = exc_state->exc_traceback;
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exc_state->exc_type = NULL;
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exc_state->exc_value = NULL;
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exc_state->exc_traceback = NULL;
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Py_XDECREF(t);
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Py_XDECREF(v);
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Py_XDECREF(tb);
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}
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PyAPI_FUNC(void) _PyErr_Fetch(
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PyThreadState *tstate,
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PyObject **type,
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PyObject **value,
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PyObject **traceback);
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PyAPI_FUNC(int) _PyErr_ExceptionMatches(
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PyThreadState *tstate,
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PyObject *exc);
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PyAPI_FUNC(void) _PyErr_Restore(
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PyThreadState *tstate,
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PyObject *type,
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PyObject *value,
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PyObject *traceback);
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PyAPI_FUNC(void) _PyErr_SetObject(
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PyThreadState *tstate,
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PyObject *type,
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PyObject *value);
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PyAPI_FUNC(void) _PyErr_ChainStackItem(
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_PyErr_StackItem *exc_info);
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PyAPI_FUNC(void) _PyErr_Clear(PyThreadState *tstate);
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PyAPI_FUNC(void) _PyErr_SetNone(PyThreadState *tstate, PyObject *exception);
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PyAPI_FUNC(PyObject *) _PyErr_NoMemory(PyThreadState *tstate);
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PyAPI_FUNC(void) _PyErr_SetString(
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PyThreadState *tstate,
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PyObject *exception,
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const char *string);
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PyAPI_FUNC(PyObject *) _PyErr_Format(
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PyThreadState *tstate,
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PyObject *exception,
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const char *format,
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...);
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PyAPI_FUNC(void) _PyErr_NormalizeException(
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PyThreadState *tstate,
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PyObject **exc,
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PyObject **val,
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PyObject **tb);
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PyAPI_FUNC(PyObject *) _PyErr_FormatFromCauseTstate(
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PyThreadState *tstate,
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PyObject *exception,
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const char *format,
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...);
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PyAPI_FUNC(int) _PyErr_CheckSignalsTstate(PyThreadState *tstate);
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PyAPI_FUNC(void) _Py_DumpExtensionModules(int fd, PyInterpreterState *interp);
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extern PyObject* _Py_Offer_Suggestions(PyObject* exception);
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PyAPI_FUNC(Py_ssize_t) _Py_UTF8_Edit_Cost(PyObject *str_a, PyObject *str_b,
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Py_ssize_t max_cost);
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_INTERNAL_PYERRORS_H */
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