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bpo-30285: Optimize case-insensitive matching and searching (#1482)

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of regular expressions.
This commit is contained in:
Serhiy Storchaka 2017-05-09 23:37:14 +03:00 • committed by GitHub
parent f93234bb8a
commit 6d336a0279
6 changed files with 215 additions and 70 deletions
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34
Modules/_sre.c
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@ -273,6 +273,38 @@ _sre_getcodesize_impl(PyObject *module)
return sizeof(SRE_CODE);
}
/*[clinic input]
_sre.ascii_iscased -> bool
character: int
/
[clinic start generated code]*/
static int
_sre_ascii_iscased_impl(PyObject *module, int character)
/*[clinic end generated code: output=4f454b630fbd19a2 input=9f0bd952812c7ed3]*/
{
unsigned int ch = (unsigned int)character;
return ch != sre_lower(ch) || ch != sre_upper(ch);
}
/*[clinic input]
_sre.unicode_iscased -> bool
character: int
/
[clinic start generated code]*/
static int
_sre_unicode_iscased_impl(PyObject *module, int character)
/*[clinic end generated code: output=9c5ddee0dc2bc258 input=51e42c3b8dddb78e]*/
{
unsigned int ch = (unsigned int)character;
return ch != sre_lower_unicode(ch) || ch != sre_upper_unicode(ch);
}
/*[clinic input]
_sre.ascii_tolower -> int
@ -2750,6 +2782,8 @@ static PyTypeObject Scanner_Type = {
static PyMethodDef _functions[] = {
_SRE_COMPILE_METHODDEF
_SRE_GETCODESIZE_METHODDEF
_SRE_ASCII_ISCASED_METHODDEF
_SRE_UNICODE_ISCASED_METHODDEF
_SRE_ASCII_TOLOWER_METHODDEF
_SRE_UNICODE_TOLOWER_METHODDEF
{NULL, NULL}