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34 lines
1.2 KiB
C
34 lines
1.2 KiB
C
/* Fast unicode equal function optimized for dictobject.c and setobject.c */
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/* Return 1 if two unicode objects are equal, 0 if not.
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* unicode_eq() is called when the hash of two unicode objects is equal.
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*/
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Py_LOCAL_INLINE(int)
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unicode_eq(PyObject *aa, PyObject *bb)
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{
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register PyUnicodeObject *a = (PyUnicodeObject *)aa;
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register PyUnicodeObject *b = (PyUnicodeObject *)bb;
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if (PyUnicode_READY(a) == -1 || PyUnicode_READY(b) == -1) {
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assert(0 && "unicode_eq ready fail");
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return 0;
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}
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if (PyUnicode_GET_LENGTH(a) != PyUnicode_GET_LENGTH(b))
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return 0;
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if (PyUnicode_GET_LENGTH(a) == 0)
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return 1;
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if (PyUnicode_KIND(a) != PyUnicode_KIND(b))
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return 0;
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/* Just comparing the first byte is enough to see if a and b differ.
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* If they are 2 byte or 4 byte character most differences will happen in
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* the lower bytes anyways.
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*/
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if (PyUnicode_1BYTE_DATA(a)[0] != PyUnicode_1BYTE_DATA(b)[0])
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return 0;
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if (PyUnicode_KIND(a) == PyUnicode_1BYTE_KIND &&
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PyUnicode_GET_LENGTH(a) == 1)
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return 1;
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return memcmp(PyUnicode_1BYTE_DATA(a), PyUnicode_1BYTE_DATA(b),
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PyUnicode_GET_LENGTH(a) * PyUnicode_CHARACTER_SIZE(a)) == 0;
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}
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