mirror of https://github.com/postgres/postgres
153 lines
3.8 KiB
C
153 lines
3.8 KiB
C
#include "postgres.h"
|
|
|
|
#include "fmgr.h"
|
|
#include "hstore/hstore.h"
|
|
#include "plperl.h"
|
|
|
|
PG_MODULE_MAGIC;
|
|
|
|
/* Linkage to functions in hstore module */
|
|
typedef HStore *(*hstoreUpgrade_t) (Datum orig);
|
|
static hstoreUpgrade_t hstoreUpgrade_p;
|
|
typedef int (*hstoreUniquePairs_t) (Pairs *a, int32 l, int32 *buflen);
|
|
static hstoreUniquePairs_t hstoreUniquePairs_p;
|
|
typedef HStore *(*hstorePairs_t) (Pairs *pairs, int32 pcount, int32 buflen);
|
|
static hstorePairs_t hstorePairs_p;
|
|
typedef size_t (*hstoreCheckKeyLen_t) (size_t len);
|
|
static hstoreCheckKeyLen_t hstoreCheckKeyLen_p;
|
|
typedef size_t (*hstoreCheckValLen_t) (size_t len);
|
|
static hstoreCheckValLen_t hstoreCheckValLen_p;
|
|
|
|
|
|
/*
|
|
* Module initialize function: fetch function pointers for cross-module calls.
|
|
*/
|
|
void
|
|
_PG_init(void)
|
|
{
|
|
/* Asserts verify that typedefs above match original declarations */
|
|
AssertVariableIsOfType(&hstoreUpgrade, hstoreUpgrade_t);
|
|
hstoreUpgrade_p = (hstoreUpgrade_t)
|
|
load_external_function("$libdir/hstore", "hstoreUpgrade",
|
|
true, NULL);
|
|
AssertVariableIsOfType(&hstoreUniquePairs, hstoreUniquePairs_t);
|
|
hstoreUniquePairs_p = (hstoreUniquePairs_t)
|
|
load_external_function("$libdir/hstore", "hstoreUniquePairs",
|
|
true, NULL);
|
|
AssertVariableIsOfType(&hstorePairs, hstorePairs_t);
|
|
hstorePairs_p = (hstorePairs_t)
|
|
load_external_function("$libdir/hstore", "hstorePairs",
|
|
true, NULL);
|
|
AssertVariableIsOfType(&hstoreCheckKeyLen, hstoreCheckKeyLen_t);
|
|
hstoreCheckKeyLen_p = (hstoreCheckKeyLen_t)
|
|
load_external_function("$libdir/hstore", "hstoreCheckKeyLen",
|
|
true, NULL);
|
|
AssertVariableIsOfType(&hstoreCheckValLen, hstoreCheckValLen_t);
|
|
hstoreCheckValLen_p = (hstoreCheckValLen_t)
|
|
load_external_function("$libdir/hstore", "hstoreCheckValLen",
|
|
true, NULL);
|
|
}
|
|
|
|
|
|
/* These defines must be after the module init function */
|
|
#define hstoreUpgrade hstoreUpgrade_p
|
|
#define hstoreUniquePairs hstoreUniquePairs_p
|
|
#define hstorePairs hstorePairs_p
|
|
#define hstoreCheckKeyLen hstoreCheckKeyLen_p
|
|
#define hstoreCheckValLen hstoreCheckValLen_p
|
|
|
|
|
|
PG_FUNCTION_INFO_V1(hstore_to_plperl);
|
|
|
|
Datum
|
|
hstore_to_plperl(PG_FUNCTION_ARGS)
|
|
{
|
|
dTHX;
|
|
HStore *in = PG_GETARG_HSTORE_P(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);
|
|
}
|