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Teach regular expression operators to honor collations.

This involves getting the character classification and case-folding
functions in the regex library to use the collations infrastructure.
Most of this work had been done already in connection with the upper/lower
and LIKE logic, so it was a simple matter of transposition.

While at it, split out these functions into a separate source file
regc_pg_locale.c, so that they can be correctly labeled with the Postgres
project's license rather than the Scriptics license.  These functions are
100% Postgres-written code whereas what remains in regc_locale.c is still
mostly not ours, so lumping them both under the same copyright notice was
getting more and more misleading.
This commit is contained in:
Tom Lane
2011-04-10 18:02:17 -04:00
parent 210f95f1cd
commit 1e16a8107d
12 changed files with 821 additions and 194 deletions

View File

@@ -14,6 +14,7 @@
#include "postgres.h"
#include "catalog/pg_collation.h"
#include "tsearch/dicts/spell.h"
#include "tsearch/ts_locale.h"
#include "utils/memutils.h"
@@ -425,7 +426,9 @@ NIAddAffix(IspellDict *Conf, int flag, char flagflags, const char *mask, const c
wmask = (pg_wchar *) tmpalloc((masklen + 1) * sizeof(pg_wchar));
wmasklen = pg_mb2wchar_with_len(tmask, wmask, masklen);
err = pg_regcomp(&(Affix->reg.regex), wmask, wmasklen, REG_ADVANCED | REG_NOSUB);
err = pg_regcomp(&(Affix->reg.regex), wmask, wmasklen,
REG_ADVANCED | REG_NOSUB,
DEFAULT_COLLATION_OID);
if (err)
{
char errstr[100];