mirror of https://github.com/python/cpython
bpo-32147: Improved perfomance of binascii.unhexlify(). (GH-4586)
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@ -198,6 +198,11 @@ class BinASCIITest(unittest.TestCase):
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self.assertEqual(s, u)
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self.assertRaises(binascii.Error, binascii.a2b_hex, t[:-1])
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self.assertRaises(binascii.Error, binascii.a2b_hex, t[:-1] + b'q')
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self.assertRaises(binascii.Error, binascii.a2b_hex, bytes([255, 255]))
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self.assertRaises(binascii.Error, binascii.a2b_hex, b'0G')
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self.assertRaises(binascii.Error, binascii.a2b_hex, b'0g')
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self.assertRaises(binascii.Error, binascii.a2b_hex, b'G0')
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self.assertRaises(binascii.Error, binascii.a2b_hex, b'g0')
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# Confirm that b2a_hex == hexlify and a2b_hex == unhexlify
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self.assertEqual(binascii.hexlify(self.type2test(s)), t)
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@ -460,6 +460,7 @@ Michael Farrell
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Troy J. Farrell
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Jim Fasarakis-Hilliard
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Mark Favas
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Sergey Fedoseev
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Boris Feld
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Thomas Fenzl
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Niels Ferguson
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@ -0,0 +1,2 @@
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:func:`binascii.unhexlify` is now up to 2 times faster.
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Patch by Sergey Fedoseev.
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@ -1130,21 +1130,6 @@ binascii_hexlify_impl(PyObject *module, Py_buffer *data)
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return _Py_strhex_bytes((const char *)data->buf, data->len);
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}
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static int
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to_int(int c)
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{
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if (Py_ISDIGIT(c))
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return c - '0';
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else {
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if (Py_ISUPPER(c))
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c = Py_TOLOWER(c);
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if (c >= 'a' && c <= 'f')
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return c - 'a' + 10;
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}
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return -1;
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}
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/*[clinic input]
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binascii.a2b_hex
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@ -1187,9 +1172,9 @@ binascii_a2b_hex_impl(PyObject *module, Py_buffer *hexstr)
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retbuf = PyBytes_AS_STRING(retval);
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for (i=j=0; i < arglen; i += 2) {
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int top = to_int(Py_CHARMASK(argbuf[i]));
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int bot = to_int(Py_CHARMASK(argbuf[i+1]));
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if (top == -1 || bot == -1) {
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unsigned int top = _PyLong_DigitValue[Py_CHARMASK(argbuf[i])];
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unsigned int bot = _PyLong_DigitValue[Py_CHARMASK(argbuf[i+1])];
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if (top >= 16 || bot >= 16) {
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PyErr_SetString(Error,
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"Non-hexadecimal digit found");
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goto finally;
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@ -1218,19 +1203,6 @@ binascii_unhexlify_impl(PyObject *module, Py_buffer *hexstr)
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return binascii_a2b_hex_impl(module, hexstr);
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}
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static const int table_hex[128] = {
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-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
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-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
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-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9,-1,-1, -1,-1,-1,-1,
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-1,10,11,12, 13,14,15,-1, -1,-1,-1,-1, -1,-1,-1,-1,
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-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
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-1,10,11,12, 13,14,15,-1, -1,-1,-1,-1, -1,-1,-1,-1,
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-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1
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};
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#define hexval(c) table_hex[(unsigned int)(c)]
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#define MAXLINESIZE 76
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@ -1293,9 +1265,9 @@ binascii_a2b_qp_impl(PyObject *module, Py_buffer *data, int header)
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(ascii_data[in+1] >= 'a' && ascii_data[in+1] <= 'f') ||
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(ascii_data[in+1] >= '0' && ascii_data[in+1] <= '9'))) {
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/* hexval */
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ch = hexval(ascii_data[in]) << 4;
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ch = _PyLong_DigitValue[ascii_data[in]] << 4;
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in++;
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ch |= hexval(ascii_data[in]);
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ch |= _PyLong_DigitValue[ascii_data[in]];
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in++;
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odata[out++] = ch;
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}
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