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Control ctype behavior internally with a method table.

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Previously, pattern matching and case mapping behavior branched based
on the provider. Refactor to use a method table, which is less
error-prone.

This is also a step toward multiple provider versions, which we may
want to support in the future.

Reviewed-by: Andreas Karlsson <andreas@proxel.se>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://postgr.es/m/2830211e1b6e6a2e26d845780b03e125281ea17b.camel%40j-davis.com
This commit is contained in:
Jeff Davis
2025-07-01 07:42:39 -07:00
parent d81dcc8d62
commit 5a38104b36
9 changed files with 686 additions and 508 deletions
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7
src/backend/utils/adt/like_support.c
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@@ -1495,13 +1495,8 @@ pattern_char_isalpha(char c, bool is_multibyte,
{
if (locale->ctype_is_c)
return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
else if (is_multibyte && IS_HIGHBIT_SET(c))
return true;
else if (locale->provider != COLLPROVIDER_LIBC)
return IS_HIGHBIT_SET(c) ||
(c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
else
return isalpha_l((unsigned char) c, locale->info.lt);
return char_is_cased(c, locale);
}