mirror of
https://github.com/postgres/postgres.git
synced 2025-11-03 09:13:20 +03:00
645929c545
Bring this transform function into sync with the policy established
by commit 3a382983d.
Also, fix it to make sure that what it drills down to is indeed a
hash, and not some other kind of Perl SV. Previously, the test
cases added here provoked crashes.
Because of the crash hazard, back-patch to 9.5 where this module
was introduced.
Discussion: https://postgr.es/m/28336.1528393969@sss.pgh.pa.us
104 lines
2.0 KiB
C
104 lines
2.0 KiB
C
#include "postgres.h"
|
|
#undef _
|
|
#include "fmgr.h"
|
|
#include "plperl.h"
|
|
#include "plperl_helpers.h"
|
|
#include "hstore.h"
|
|
|
|
PG_MODULE_MAGIC;
|
|
|
|
|
|
PG_FUNCTION_INFO_V1(hstore_to_plperl);
|
|
|
|
Datum
|
|
hstore_to_plperl(PG_FUNCTION_ARGS)
|
|
{
|
|
dTHX;
|
|
HStore *in = PG_GETARG_HS(0);
|
|
int i;
|
|
int count = HS_COUNT(in);
|
|
char *base = STRPTR(in);
|
|
HEntry *entries = ARRPTR(in);
|
|
HV *hv;
|
|
|
|
hv = newHV();
|
|
|
|
for (i = 0; i < count; i++)
|
|
{
|
|
const char *key;
|
|
SV *value;
|
|
|
|
key = pnstrdup(HSTORE_KEY(entries, base, i),
|
|
HSTORE_KEYLEN(entries, i));
|
|
value = HSTORE_VALISNULL(entries, i) ? newSV(0) :
|
|
cstr2sv(pnstrdup(HSTORE_VAL(entries, base, i),
|
|
HSTORE_VALLEN(entries, i)));
|
|
|
|
(void) hv_store(hv, key, strlen(key), value, 0);
|
|
}
|
|
|
|
return PointerGetDatum(newRV((SV *) hv));
|
|
}
|
|
|
|
|
|
PG_FUNCTION_INFO_V1(plperl_to_hstore);
|
|
|
|
Datum
|
|
plperl_to_hstore(PG_FUNCTION_ARGS)
|
|
{
|
|
dTHX;
|
|
SV *in = (SV *) PG_GETARG_POINTER(0);
|
|
HV *hv;
|
|
HE *he;
|
|
int32 buflen;
|
|
int32 i;
|
|
int32 pcount;
|
|
HStore *out;
|
|
Pairs *pairs;
|
|
|
|
/* Dereference references recursively. */
|
|
while (SvROK(in))
|
|
in = SvRV(in);
|
|
|
|
/* Now we must have a hash. */
|
|
if (SvTYPE(in) != SVt_PVHV)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
(errmsg("cannot transform non-hash Perl value to hstore"))));
|
|
hv = (HV *) in;
|
|
|
|
pcount = hv_iterinit(hv);
|
|
|
|
pairs = palloc(pcount * sizeof(Pairs));
|
|
|
|
i = 0;
|
|
while ((he = hv_iternext(hv)))
|
|
{
|
|
char *key = sv2cstr(HeSVKEY_force(he));
|
|
SV *value = HeVAL(he);
|
|
|
|
pairs[i].key = pstrdup(key);
|
|
pairs[i].keylen = hstoreCheckKeyLen(strlen(pairs[i].key));
|
|
pairs[i].needfree = true;
|
|
|
|
if (!SvOK(value))
|
|
{
|
|
pairs[i].val = NULL;
|
|
pairs[i].vallen = 0;
|
|
pairs[i].isnull = true;
|
|
}
|
|
else
|
|
{
|
|
pairs[i].val = pstrdup(sv2cstr(value));
|
|
pairs[i].vallen = hstoreCheckValLen(strlen(pairs[i].val));
|
|
pairs[i].isnull = false;
|
|
}
|
|
|
|
i++;
|
|
}
|
|
|
|
pcount = hstoreUniquePairs(pairs, pcount, &buflen);
|
|
out = hstorePairs(pairs, pcount, buflen);
|
|
PG_RETURN_POINTER(out);
|
|
}
|