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Commitd87d548

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Refactor to add pg_strcoll(), pg_strxfrm(), and variants.
Offers a generally better separation of responsibilities for collationcode. Also, a step towards multi-lib ICU, which should be based on aclean separation of the routines required for collation providers.Callers with NUL-terminated strings should call pg_strcoll() orpg_strxfrm(); callers with strings and their length should call thevariants pg_strncoll() or pg_strnxfrm().Reviewed-by: Peter Eisentraut, Peter GeogheganDiscussion:https://postgr.es/m/a581136455c940d7bd0ff482d3a2bd51af25a94f.camel%40j-davis.com
1 parente996073 commitd87d548

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5 files changed

+871
-391
lines changed

5 files changed

+871
-391
lines changed

‎src/backend/access/hash/hashfunc.c

Lines changed: 34 additions & 27 deletions
Original file line numberDiff line numberDiff line change
@@ -292,21 +292,24 @@ hashtext(PG_FUNCTION_ARGS)
292292
#ifdefUSE_ICU
293293
if (mylocale->provider==COLLPROVIDER_ICU)
294294
{
295-
int32_tulen=-1;
296-
UChar*uchar=NULL;
297-
Sizebsize;
298-
uint8_t*buf;
295+
Sizebsize,rsize;
296+
char*buf;
297+
constchar*keydata=VARDATA_ANY(key);
298+
size_tkeylen=VARSIZE_ANY_EXHDR(key);
299299

300-
ulen=icu_to_uchar(&uchar,VARDATA_ANY(key),VARSIZE_ANY_EXHDR(key));
300+
bsize=pg_strnxfrm(NULL,0,keydata,keylen,mylocale);
301+
buf=palloc(bsize+1);
301302

302-
bsize=ucol_getSortKey(mylocale->info.icu.ucol,
303-
uchar,ulen,NULL,0);
304-
buf=palloc(bsize);
305-
ucol_getSortKey(mylocale->info.icu.ucol,
306-
uchar,ulen,buf,bsize);
307-
pfree(uchar);
303+
rsize=pg_strnxfrm(buf,bsize+1,keydata,keylen,mylocale);
304+
if (rsize!=bsize)
305+
elog(ERROR,"pg_strnxfrm() returned unexpected result");
308306

309-
result=hash_any(buf,bsize);
307+
/*
308+
* In principle, there's no reason to include the terminating NUL
309+
* character in the hash, but it was done before and the behavior
310+
* must be preserved.
311+
*/
312+
result=hash_any((uint8_t*)buf,bsize+1);
310313

311314
pfree(buf);
312315
}
@@ -350,21 +353,25 @@ hashtextextended(PG_FUNCTION_ARGS)
350353
#ifdefUSE_ICU
351354
if (mylocale->provider==COLLPROVIDER_ICU)
352355
{
353-
int32_tulen=-1;
354-
UChar*uchar=NULL;
355-
Sizebsize;
356-
uint8_t*buf;
357-
358-
ulen=icu_to_uchar(&uchar,VARDATA_ANY(key),VARSIZE_ANY_EXHDR(key));
359-
360-
bsize=ucol_getSortKey(mylocale->info.icu.ucol,
361-
uchar,ulen,NULL,0);
362-
buf=palloc(bsize);
363-
ucol_getSortKey(mylocale->info.icu.ucol,
364-
uchar,ulen,buf,bsize);
365-
pfree(uchar);
366-
367-
result=hash_any_extended(buf,bsize,PG_GETARG_INT64(1));
356+
Sizebsize,rsize;
357+
char*buf;
358+
constchar*keydata=VARDATA_ANY(key);
359+
size_tkeylen=VARSIZE_ANY_EXHDR(key);
360+
361+
bsize=pg_strnxfrm(NULL,0,keydata,keylen,mylocale);
362+
buf=palloc(bsize+1);
363+
364+
rsize=pg_strnxfrm(buf,bsize+1,keydata,keylen,mylocale);
365+
if (rsize!=bsize)
366+
elog(ERROR,"pg_strnxfrm() returned unexpected result");
367+
368+
/*
369+
* In principle, there's no reason to include the terminating NUL
370+
* character in the hash, but it was done before and the behavior
371+
* must be preserved.
372+
*/
373+
result=hash_any_extended((uint8_t*)buf,bsize+1,
374+
PG_GETARG_INT64(1));
368375

369376
pfree(buf);
370377
}

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