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gh-152054: Speed up matching of case-insensitive character sets #152055

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gh-152054: Speed up matching of case-insensitive character sets #152055

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23 changes: 23 additions & 0 deletions Modules/_sre/sre_lib.h
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Original file line number Diff line number Diff line change
Expand Up @@ -213,6 +213,29 @@ SRE(count)(SRE_STATE* state, const SRE_CODE* pattern, Py_ssize_t maxcount)
ptr++;
break;

case SRE_OP_IN_IGNORE:
/* repeated set, case-insensitive (ascii) */
TRACE(("|%p|%p|COUNT IN_IGNORE\n", pattern, ptr));
while (ptr < end && SRE(charset)(state, pattern + 2,
(SRE_CODE) sre_lower_ascii(*ptr)))
ptr++;
break;

case SRE_OP_IN_UNI_IGNORE:
/* repeated set, case-insensitive (unicode) */
TRACE(("|%p|%p|COUNT IN_UNI_IGNORE\n", pattern, ptr));
while (ptr < end && SRE(charset)(state, pattern + 2,
(SRE_CODE) sre_lower_unicode(*ptr)))
ptr++;
break;

case SRE_OP_IN_LOC_IGNORE:
/* repeated set, case-insensitive (locale) */
TRACE(("|%p|%p|COUNT IN_LOC_IGNORE\n", pattern, ptr));
while (ptr < end && SRE(charset_loc_ignore)(state, pattern + 2, *ptr))
ptr++;
break;

case SRE_OP_ANY:
/* repeated dot wildcard. */
TRACE(("|%p|%p|COUNT ANY\n", pattern, ptr));
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