mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-07-14 23:49:18 +02:00
234a02b2a8
Get rid of VARATT_SIZE and VARATT_DATA, which were simply redundant with VARSIZE and VARDATA, and as a consequence almost no code was using the longer names. Rename the length fields of struct varlena and various derived structures to catch anyplace that was accessing them directly; and clean up various places so caught. In itself this patch doesn't change any behavior at all, but it is necessary infrastructure if we hope to play any games with the representation of varlena headers. Greg Stark and Tom Lane
596 lines
13 KiB
C
596 lines
13 KiB
C
#include "btree_gist.h"
|
|
|
|
#include <math.h>
|
|
#include <limits.h>
|
|
#include <float.h>
|
|
|
|
#include "btree_utils_var.h"
|
|
#include "utils/pg_locale.h"
|
|
#include "utils/builtins.h"
|
|
|
|
PG_FUNCTION_INFO_V1(gbt_var_decompress);
|
|
Datum gbt_var_decompress(PG_FUNCTION_ARGS);
|
|
|
|
|
|
Datum
|
|
gbt_var_decompress(PG_FUNCTION_ARGS)
|
|
{
|
|
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
|
|
GBT_VARKEY *key = (GBT_VARKEY *) DatumGetPointer(PG_DETOAST_DATUM(entry->key));
|
|
|
|
if (key != (GBT_VARKEY *) DatumGetPointer(entry->key))
|
|
{
|
|
GISTENTRY *retval = (GISTENTRY *) palloc(sizeof(GISTENTRY));
|
|
|
|
gistentryinit(*retval, PointerGetDatum(key),
|
|
entry->rel, entry->page,
|
|
entry->offset, FALSE);
|
|
|
|
PG_RETURN_POINTER(retval);
|
|
}
|
|
|
|
PG_RETURN_POINTER(entry);
|
|
}
|
|
|
|
/* Returns a better readable representaion of variable key ( sets pointer ) */
|
|
GBT_VARKEY_R
|
|
gbt_var_key_readable(const GBT_VARKEY * k)
|
|
{
|
|
|
|
GBT_VARKEY_R r;
|
|
|
|
r.lower = (bytea *) &(((char *) k)[VARHDRSZ]);
|
|
if (VARSIZE(k) > (VARHDRSZ + (VARSIZE(r.lower))))
|
|
r.upper = (bytea *) &(((char *) k)[VARHDRSZ + INTALIGN(VARSIZE(r.lower))]);
|
|
else
|
|
r.upper = r.lower;
|
|
return r;
|
|
}
|
|
|
|
|
|
GBT_VARKEY *
|
|
gbt_var_key_copy(const GBT_VARKEY_R * u, bool force_node)
|
|
{
|
|
GBT_VARKEY *r = NULL;
|
|
|
|
if (u->lower == u->upper && !force_node)
|
|
{ /* leaf key mode */
|
|
r = (GBT_VARKEY *) palloc(VARSIZE(u->lower) + VARHDRSZ);
|
|
memcpy(VARDATA(r), u->lower, VARSIZE(u->lower));
|
|
SET_VARSIZE(r, VARSIZE(u->lower) + VARHDRSZ);
|
|
}
|
|
else
|
|
{ /* node key mode */
|
|
r = (GBT_VARKEY *) palloc(INTALIGN(VARSIZE(u->lower)) + VARSIZE(u->upper) + VARHDRSZ);
|
|
memcpy(VARDATA(r), u->lower, VARSIZE(u->lower));
|
|
memcpy(VARDATA(r) + INTALIGN(VARSIZE(u->lower)), u->upper, VARSIZE(u->upper));
|
|
SET_VARSIZE(r, INTALIGN(VARSIZE(u->lower)) + VARSIZE(u->upper) + VARHDRSZ);
|
|
}
|
|
return r;
|
|
}
|
|
|
|
|
|
static GBT_VARKEY *
|
|
gbt_var_leaf2node(GBT_VARKEY * leaf, const gbtree_vinfo * tinfo)
|
|
{
|
|
GBT_VARKEY *out = leaf;
|
|
|
|
if (tinfo->f_l2n)
|
|
out = (*tinfo->f_l2n) (leaf);
|
|
|
|
return out;
|
|
}
|
|
|
|
|
|
/*
|
|
* returns the common prefix length of a node key
|
|
*/
|
|
static int32
|
|
gbt_var_node_cp_len(const GBT_VARKEY * node, const gbtree_vinfo * tinfo)
|
|
{
|
|
|
|
GBT_VARKEY_R r = gbt_var_key_readable(node);
|
|
int32 i = 0;
|
|
int32 l = 0;
|
|
int32 t1len = VARSIZE(r.lower) - VARHDRSZ;
|
|
int32 t2len = VARSIZE(r.upper) - VARHDRSZ;
|
|
int32 ml = Min(t1len, t2len);
|
|
|
|
char *p1 = VARDATA(r.lower);
|
|
char *p2 = VARDATA(r.upper);
|
|
|
|
if (ml == 0)
|
|
return 0;
|
|
|
|
while (i < ml)
|
|
{
|
|
if (tinfo->eml > 1 && l == 0)
|
|
{
|
|
|
|
if ((l = pg_mblen(p1)) != pg_mblen(p2))
|
|
{
|
|
return i;
|
|
}
|
|
}
|
|
if (*p1 != *p2)
|
|
{
|
|
if (tinfo->eml > 1)
|
|
{
|
|
return (i - l + 1);
|
|
}
|
|
else
|
|
{
|
|
return i;
|
|
}
|
|
}
|
|
|
|
p1++;
|
|
p2++;
|
|
l--;
|
|
i++;
|
|
}
|
|
return (ml); /* lower == upper */
|
|
}
|
|
|
|
|
|
/*
|
|
* returns true, if query matches prefix ( common prefix )
|
|
*/
|
|
static bool
|
|
gbt_bytea_pf_match(const bytea *pf, const bytea *query, const gbtree_vinfo * tinfo)
|
|
{
|
|
|
|
bool out = FALSE;
|
|
int32 k = 0;
|
|
int32 qlen = VARSIZE(query) - VARHDRSZ;
|
|
int32 nlen = VARSIZE(pf) - VARHDRSZ;
|
|
|
|
if (nlen <= qlen)
|
|
{
|
|
char *q = VARDATA(query);
|
|
char *n = VARDATA(pf);
|
|
|
|
if (tinfo->eml > 1)
|
|
{
|
|
out = (varstr_cmp(q, nlen, n, nlen) == 0);
|
|
}
|
|
else
|
|
{
|
|
out = TRUE;
|
|
for (k = 0; k < nlen; k++)
|
|
{
|
|
if (*n != *q)
|
|
{
|
|
out = FALSE;
|
|
break;
|
|
}
|
|
if (k < (nlen - 1))
|
|
{
|
|
q++;
|
|
n++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return out;
|
|
}
|
|
|
|
|
|
/*
|
|
* returns true, if query matches node using common prefix
|
|
*/
|
|
|
|
static bool
|
|
gbt_var_node_pf_match(const GBT_VARKEY_R * node, const bytea *query, const gbtree_vinfo * tinfo)
|
|
{
|
|
|
|
return (tinfo->trnc && (
|
|
gbt_bytea_pf_match(node->lower, query, tinfo) ||
|
|
gbt_bytea_pf_match(node->upper, query, tinfo)
|
|
));
|
|
|
|
}
|
|
|
|
|
|
/*
|
|
* truncates / compresses the node key
|
|
* cpf_length .. common prefix length
|
|
*/
|
|
static GBT_VARKEY *
|
|
gbt_var_node_truncate(const GBT_VARKEY * node, int32 cpf_length, const gbtree_vinfo * tinfo)
|
|
{
|
|
GBT_VARKEY *out = NULL;
|
|
GBT_VARKEY_R r = gbt_var_key_readable(node);
|
|
int32 len1 = VARSIZE(r.lower) - VARHDRSZ;
|
|
int32 len2 = VARSIZE(r.upper) - VARHDRSZ;
|
|
int32 si;
|
|
char *out2;
|
|
|
|
len1 = Min(len1, (cpf_length + 1));
|
|
len2 = Min(len2, (cpf_length + 1));
|
|
|
|
si = 2 * VARHDRSZ + INTALIGN(len1 + VARHDRSZ) + len2;
|
|
out = (GBT_VARKEY *) palloc(si);
|
|
SET_VARSIZE(out, si);
|
|
|
|
memcpy(VARDATA(out), r.lower, len1 + VARHDRSZ);
|
|
SET_VARSIZE(VARDATA(out), len1 + VARHDRSZ);
|
|
|
|
out2 = VARDATA(out) + INTALIGN(len1 + VARHDRSZ);
|
|
memcpy(out2, r.upper, len2 + VARHDRSZ);
|
|
SET_VARSIZE(out2, len2 + VARHDRSZ);
|
|
|
|
return out;
|
|
}
|
|
|
|
|
|
|
|
void
|
|
gbt_var_bin_union(Datum *u, GBT_VARKEY * e, const gbtree_vinfo * tinfo)
|
|
{
|
|
|
|
GBT_VARKEY *nk = NULL;
|
|
GBT_VARKEY *tmp = NULL;
|
|
GBT_VARKEY_R nr;
|
|
GBT_VARKEY_R eo = gbt_var_key_readable(e);
|
|
|
|
if (eo.lower == eo.upper) /* leaf */
|
|
{
|
|
tmp = gbt_var_leaf2node(e, tinfo);
|
|
if (tmp != e)
|
|
eo = gbt_var_key_readable(tmp);
|
|
}
|
|
|
|
if (DatumGetPointer(*u))
|
|
{
|
|
|
|
GBT_VARKEY_R ro = gbt_var_key_readable((GBT_VARKEY *) DatumGetPointer(*u));
|
|
|
|
if ((*tinfo->f_cmp) ((bytea *) ro.lower, (bytea *) eo.lower) > 0)
|
|
{
|
|
nr.lower = eo.lower;
|
|
nr.upper = ro.upper;
|
|
nk = gbt_var_key_copy(&nr, TRUE);
|
|
}
|
|
|
|
if ((*tinfo->f_cmp) ((bytea *) ro.upper, (bytea *) eo.upper) < 0)
|
|
{
|
|
nr.upper = eo.upper;
|
|
nr.lower = ro.lower;
|
|
nk = gbt_var_key_copy(&nr, TRUE);
|
|
}
|
|
|
|
if (nk)
|
|
*u = PointerGetDatum(nk);
|
|
}
|
|
else
|
|
{
|
|
nr.lower = eo.lower;
|
|
nr.upper = eo.upper;
|
|
*u = PointerGetDatum(gbt_var_key_copy(&nr, TRUE));
|
|
}
|
|
}
|
|
|
|
|
|
|
|
GISTENTRY *
|
|
gbt_var_compress(GISTENTRY *entry, const gbtree_vinfo * tinfo)
|
|
{
|
|
|
|
GISTENTRY *retval;
|
|
|
|
if (entry->leafkey)
|
|
{
|
|
GBT_VARKEY *r = NULL;
|
|
bytea *leaf = (bytea *) DatumGetPointer(PG_DETOAST_DATUM(entry->key));
|
|
GBT_VARKEY_R u;
|
|
|
|
u.lower = u.upper = leaf;
|
|
r = gbt_var_key_copy(&u, FALSE);
|
|
|
|
retval = palloc(sizeof(GISTENTRY));
|
|
gistentryinit(*retval, PointerGetDatum(r),
|
|
entry->rel, entry->page,
|
|
entry->offset, TRUE);
|
|
}
|
|
else
|
|
retval = entry;
|
|
|
|
return (retval);
|
|
}
|
|
|
|
|
|
|
|
GBT_VARKEY *
|
|
gbt_var_union(const GistEntryVector *entryvec, int32 *size, const gbtree_vinfo * tinfo)
|
|
{
|
|
|
|
int i = 0,
|
|
numranges = entryvec->n;
|
|
GBT_VARKEY *cur;
|
|
Datum out;
|
|
GBT_VARKEY_R rk;
|
|
|
|
*size = sizeof(GBT_VARKEY);
|
|
|
|
cur = (GBT_VARKEY *) DatumGetPointer(entryvec->vector[0].key);
|
|
rk = gbt_var_key_readable(cur);
|
|
out = PointerGetDatum(gbt_var_key_copy(&rk, TRUE));
|
|
|
|
for (i = 1; i < numranges; i++)
|
|
{
|
|
cur = (GBT_VARKEY *) DatumGetPointer(entryvec->vector[i].key);
|
|
gbt_var_bin_union(&out, cur, tinfo);
|
|
}
|
|
|
|
|
|
/* Truncate (=compress) key */
|
|
if (tinfo->trnc)
|
|
{
|
|
int32 plen;
|
|
GBT_VARKEY *trc = NULL;
|
|
|
|
plen = gbt_var_node_cp_len((GBT_VARKEY *) DatumGetPointer(out), tinfo);
|
|
trc = gbt_var_node_truncate((GBT_VARKEY *) DatumGetPointer(out), plen + 1, tinfo);
|
|
|
|
out = PointerGetDatum(trc);
|
|
}
|
|
|
|
return ((GBT_VARKEY *) DatumGetPointer(out));
|
|
}
|
|
|
|
|
|
bool
|
|
gbt_var_same(bool *result, const Datum d1, const Datum d2, const gbtree_vinfo * tinfo)
|
|
{
|
|
|
|
GBT_VARKEY *t1 = (GBT_VARKEY *) DatumGetPointer(d1);
|
|
GBT_VARKEY *t2 = (GBT_VARKEY *) DatumGetPointer(d2);
|
|
GBT_VARKEY_R r1,
|
|
r2;
|
|
|
|
r1 = gbt_var_key_readable(t1);
|
|
r2 = gbt_var_key_readable(t2);
|
|
|
|
if (t1 && t2)
|
|
{
|
|
*result = (((*tinfo->f_cmp) ((bytea *) r1.lower, (bytea *) r2.lower) == 0
|
|
&& (*tinfo->f_cmp) ((bytea *) r1.upper, (bytea *) r2.upper) == 0) ? TRUE : FALSE);
|
|
}
|
|
else
|
|
*result = (t1 == NULL && t2 == NULL) ? TRUE : FALSE;
|
|
|
|
PG_RETURN_POINTER(result);
|
|
}
|
|
|
|
|
|
|
|
float *
|
|
gbt_var_penalty(float *res, const GISTENTRY *o, const GISTENTRY *n, const gbtree_vinfo * tinfo)
|
|
{
|
|
|
|
GBT_VARKEY *orge = (GBT_VARKEY *) DatumGetPointer(o->key);
|
|
GBT_VARKEY *newe = (GBT_VARKEY *) DatumGetPointer(n->key);
|
|
GBT_VARKEY_R ok,
|
|
nk;
|
|
GBT_VARKEY *tmp = NULL;
|
|
|
|
*res = 0.0;
|
|
|
|
nk = gbt_var_key_readable(newe);
|
|
if (nk.lower == nk.upper) /* leaf */
|
|
{
|
|
tmp = gbt_var_leaf2node(newe, tinfo);
|
|
if (tmp != newe)
|
|
nk = gbt_var_key_readable(tmp);
|
|
}
|
|
ok = gbt_var_key_readable(orge);
|
|
|
|
if ((VARSIZE(ok.lower) - VARHDRSZ) == 0 && (VARSIZE(ok.upper) - VARHDRSZ) == 0)
|
|
*res = 0.0;
|
|
else if (!(
|
|
(
|
|
((*tinfo->f_cmp) (nk.lower, ok.lower) >= 0 || gbt_bytea_pf_match(ok.lower, nk.lower, tinfo)) &&
|
|
((*tinfo->f_cmp) (nk.upper, ok.upper) <= 0 || gbt_bytea_pf_match(ok.upper, nk.upper, tinfo))
|
|
)
|
|
))
|
|
{
|
|
Datum d = PointerGetDatum(0);
|
|
double dres = 0.0;
|
|
int32 ol,
|
|
ul;
|
|
|
|
gbt_var_bin_union(&d, orge, tinfo);
|
|
ol = gbt_var_node_cp_len((GBT_VARKEY *) DatumGetPointer(d), tinfo);
|
|
gbt_var_bin_union(&d, newe, tinfo);
|
|
ul = gbt_var_node_cp_len((GBT_VARKEY *) DatumGetPointer(d), tinfo);
|
|
|
|
if (ul < ol)
|
|
{
|
|
dres = (ol - ul); /* lost of common prefix len */
|
|
}
|
|
else
|
|
{
|
|
GBT_VARKEY_R uk = gbt_var_key_readable((GBT_VARKEY *) DatumGetPointer(d));
|
|
|
|
char tmp[4];
|
|
|
|
tmp[0] = ((VARSIZE(ok.lower) - VARHDRSZ) == ul) ? (CHAR_MIN) : (VARDATA(ok.lower)[ul]);
|
|
tmp[1] = ((VARSIZE(uk.lower) - VARHDRSZ) == ul) ? (CHAR_MIN) : (VARDATA(uk.lower)[ul]);
|
|
tmp[2] = ((VARSIZE(ok.upper) - VARHDRSZ) == ul) ? (CHAR_MIN) : (VARDATA(ok.upper)[ul]);
|
|
tmp[3] = ((VARSIZE(uk.upper) - VARHDRSZ) == ul) ? (CHAR_MIN) : (VARDATA(uk.upper)[ul]);
|
|
dres = (tmp[0] - tmp[1]) +
|
|
(tmp[3] - tmp[2]);
|
|
dres /= 256.0;
|
|
}
|
|
|
|
*res += FLT_MIN;
|
|
*res += (float) (dres / ((double) (ol + 1)));
|
|
*res *= (FLT_MAX / (o->rel->rd_att->natts + 1));
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
static int
|
|
gbt_vsrt_cmp(const void *a, const void *b, void *arg)
|
|
{
|
|
GBT_VARKEY_R ar = gbt_var_key_readable(((const Vsrt *) a)->t);
|
|
GBT_VARKEY_R br = gbt_var_key_readable(((const Vsrt *) b)->t);
|
|
const gbtree_vinfo *tinfo = (const gbtree_vinfo *) arg;
|
|
|
|
return (*tinfo->f_cmp) (ar.lower, br.lower);
|
|
}
|
|
|
|
GIST_SPLITVEC *
|
|
gbt_var_picksplit(const GistEntryVector *entryvec, GIST_SPLITVEC *v, const gbtree_vinfo * tinfo)
|
|
{
|
|
OffsetNumber i,
|
|
maxoff = entryvec->n - 1;
|
|
Vsrt *arr;
|
|
int svcntr = 0,
|
|
nbytes;
|
|
char *cur;
|
|
GBT_VARKEY **sv = NULL;
|
|
|
|
arr = (Vsrt *) palloc((maxoff + 1) * sizeof(Vsrt));
|
|
nbytes = (maxoff + 2) * sizeof(OffsetNumber);
|
|
v->spl_left = (OffsetNumber *) palloc(nbytes);
|
|
v->spl_right = (OffsetNumber *) palloc(nbytes);
|
|
v->spl_ldatum = PointerGetDatum(0);
|
|
v->spl_rdatum = PointerGetDatum(0);
|
|
v->spl_nleft = 0;
|
|
v->spl_nright = 0;
|
|
|
|
sv = palloc(sizeof(bytea *) * (maxoff + 1));
|
|
|
|
/* Sort entries */
|
|
|
|
for (i = FirstOffsetNumber; i <= maxoff; i = OffsetNumberNext(i))
|
|
{
|
|
GBT_VARKEY_R ro;
|
|
|
|
cur = (char *) DatumGetPointer(entryvec->vector[i].key);
|
|
ro = gbt_var_key_readable((GBT_VARKEY *) cur);
|
|
if (ro.lower == ro.upper) /* leaf */
|
|
{
|
|
sv[svcntr] = gbt_var_leaf2node((GBT_VARKEY *) cur, tinfo);
|
|
arr[i].t = sv[svcntr];
|
|
if (sv[svcntr] != (GBT_VARKEY *) cur)
|
|
svcntr++;
|
|
}
|
|
else
|
|
arr[i].t = (GBT_VARKEY *) cur;
|
|
arr[i].i = i;
|
|
}
|
|
|
|
/* sort */
|
|
qsort_arg((void *) &arr[FirstOffsetNumber],
|
|
maxoff - FirstOffsetNumber + 1,
|
|
sizeof(Vsrt),
|
|
gbt_vsrt_cmp,
|
|
(void *) tinfo);
|
|
|
|
/* We do simply create two parts */
|
|
|
|
for (i = FirstOffsetNumber; i <= maxoff; i = OffsetNumberNext(i))
|
|
{
|
|
if (i <= (maxoff - FirstOffsetNumber + 1) / 2)
|
|
{
|
|
gbt_var_bin_union(&v->spl_ldatum, arr[i].t, tinfo);
|
|
v->spl_left[v->spl_nleft] = arr[i].i;
|
|
v->spl_nleft++;
|
|
}
|
|
else
|
|
{
|
|
gbt_var_bin_union(&v->spl_rdatum, arr[i].t, tinfo);
|
|
v->spl_right[v->spl_nright] = arr[i].i;
|
|
v->spl_nright++;
|
|
}
|
|
}
|
|
|
|
/* Truncate (=compress) key */
|
|
if (tinfo->trnc)
|
|
{
|
|
int32 ll = gbt_var_node_cp_len((GBT_VARKEY *) DatumGetPointer(v->spl_ldatum), tinfo);
|
|
int32 lr = gbt_var_node_cp_len((GBT_VARKEY *) DatumGetPointer(v->spl_rdatum), tinfo);
|
|
GBT_VARKEY *dl;
|
|
GBT_VARKEY *dr;
|
|
|
|
ll = Max(ll, lr);
|
|
ll++;
|
|
|
|
dl = gbt_var_node_truncate((GBT_VARKEY *) DatumGetPointer(v->spl_ldatum), ll, tinfo);
|
|
dr = gbt_var_node_truncate((GBT_VARKEY *) DatumGetPointer(v->spl_rdatum), ll, tinfo);
|
|
v->spl_ldatum = PointerGetDatum(dl);
|
|
v->spl_rdatum = PointerGetDatum(dr);
|
|
}
|
|
|
|
return v;
|
|
}
|
|
|
|
|
|
/*
|
|
* The GiST consistent method
|
|
*/
|
|
bool
|
|
gbt_var_consistent(
|
|
GBT_VARKEY_R * key,
|
|
const void *query,
|
|
const StrategyNumber *strategy,
|
|
bool is_leaf,
|
|
const gbtree_vinfo * tinfo
|
|
)
|
|
{
|
|
bool retval = FALSE;
|
|
|
|
switch (*strategy)
|
|
{
|
|
case BTLessEqualStrategyNumber:
|
|
if (is_leaf)
|
|
retval = (*tinfo->f_ge) (query, (void *) key->lower);
|
|
else
|
|
retval = (*tinfo->f_cmp) ((bytea *) query, key->lower) >= 0
|
|
|| gbt_var_node_pf_match(key, query, tinfo);
|
|
break;
|
|
case BTLessStrategyNumber:
|
|
if (is_leaf)
|
|
retval = (*tinfo->f_gt) (query, (void *) key->lower);
|
|
else
|
|
retval = (*tinfo->f_cmp) ((bytea *) query, key->lower) >= 0
|
|
|| gbt_var_node_pf_match(key, query, tinfo);
|
|
break;
|
|
case BTEqualStrategyNumber:
|
|
if (is_leaf)
|
|
retval = (*tinfo->f_eq) (query, (void *) key->lower);
|
|
else
|
|
retval = (
|
|
(
|
|
(*tinfo->f_cmp) (key->lower, (bytea *) query) <= 0 &&
|
|
(*tinfo->f_cmp) ((bytea *) query, (void *) key->upper) <= 0
|
|
) || gbt_var_node_pf_match(key, query, tinfo)
|
|
);
|
|
break;
|
|
case BTGreaterStrategyNumber:
|
|
if (is_leaf)
|
|
retval = (*tinfo->f_lt) (query, (void *) key->upper);
|
|
else
|
|
retval = (*tinfo->f_cmp) ((bytea *) query, key->upper) <= 0
|
|
|| gbt_var_node_pf_match(key, query, tinfo);
|
|
break;
|
|
case BTGreaterEqualStrategyNumber:
|
|
if (is_leaf)
|
|
retval = (*tinfo->f_le) (query, (void *) key->upper);
|
|
else
|
|
retval = (*tinfo->f_cmp) ((bytea *) query, key->upper) <= 0
|
|
|| gbt_var_node_pf_match(key, query, tinfo);
|
|
break;
|
|
default:
|
|
retval = FALSE;
|
|
}
|
|
|
|
return (retval);
|
|
}
|