boolean_t gvusr_queryget(mval *v)
{ /* this function logically should be in DDPGVUSR, but is now in GTMSHR because the tree of functions called from
* str2gvkey_nogvfunc use globals that are currently not setup in DDPGVUSR, and the number of globals makes for nasty problems
* in the link */
/* $Q and $G as separate steps, if $G returns "", loop until $Q returns "" or $Q and $G return non "" */
for (; ;)
{
if (gvusr_query(v))
{
str2gvkey_nogvfunc(v->str.addr, v->str.len, gv_currkey); /* setup gv_currkey from return of query */
if (gvusr_get(v))
{
s2pool(&v->str);
return TRUE;
}
} else
return FALSE;
}
}
void op_gvquery (mval *v)
{
int4 size;
unsigned char buff[MAX_ZWR_KEY_SZ], *end, *glob_begin;
bool found;
enum db_acc_method acc_meth;
unsigned char *extnamsrc, *extnamdst, *extnamtop;
int maxlen;
char extnamdelim[] = "^|\"\"|";
mval val;
/* We want to turn QUERY into QUERYGET for all types of access methods so that we can cache the value of the key returned
* by $QUERY. The value is very likely to be used shortly after $QUERY - Vinaya, Aug 13, 2001 */
acc_meth = gv_cur_region->dyn.addr->acc_meth;
if (gv_curr_subsc_null)
{
if (0 == gv_cur_region->std_null_coll)
gv_currkey->base[gv_currkey->prev] = 01;
else
{
gv_currkey->base[gv_currkey->end++]= 1;
gv_currkey->base[gv_currkey->end++] = 0;
gv_currkey->base[gv_currkey->end] = 0;
}
} else
{ /* Note, gv_currkey->prev isn't changed here. We rely on this in gtcmtr_query to distinguish different forms of the key */
gv_currkey->base[gv_currkey->end++]= 1;
gv_currkey->base[gv_currkey->end++] = 0;
gv_currkey->base[gv_currkey->end] = 0;
}
switch (acc_meth)
{
case dba_bg:
case dba_mm:
found = ((0 != gv_target->root) ? gvcst_query() : FALSE); /* global does not exist if root is 0 */
break;
case dba_cm:
found = gvcmx_query(&val); /* val ignored currently - Vinaya Aug 13, 2001*/
break;
case dba_usr:
found = gvusr_query(v); /* $Q result in v for dba_usr, for others, in gv_altkey */
break;
default:
assert(FALSE); /* why didn't we cover all access methods? */
found = FALSE;
break;
}
v->mvtype = MV_STR;
if (found)
{
if (acc_meth != dba_usr)
{
if ((end = format_targ_key(&buff[0], MAX_ZWR_KEY_SZ, gv_altkey, TRUE)) == 0)
end = &buff[MAX_ZWR_KEY_SZ - 1];
size = (int)(end - &buff[0] - 1); /* exclude ^ */
glob_begin = &buff[1]; /* skip ^ */
} else
{
size = v->str.len - 1; /* exclude ^ */
glob_begin = (unsigned char *)v->str.addr + 1; /* skip ^ */
}
/* Need to return a double-quote for every single-quote; assume worst case. */
/* Account for ^ in both cases - extnam and no extnam */
maxlen = size + ((0 == extnam_str.len) ? 1 : ((extnam_str.len * 2) + (int)(STR_LIT_LEN(extnamdelim))));
if ((stringpool.top - stringpool.free) < maxlen)
{
v->str.len = 0; /* so stp_gcol ignores otherwise incompletely setup mval */
stp_gcol(maxlen);
}
extnamdst = stringpool.free;
*extnamdst++ = extnamdelim[0];
if (extnam_str.len > 0)
{
*extnamdst++ = extnamdelim[1];
*extnamdst++ = extnamdelim[2];
for (extnamsrc = (unsigned char *)extnam_str.addr, extnamtop = extnamsrc + extnam_str.len;
extnamsrc < extnamtop; )
{
*extnamdst++ = *extnamsrc;
if ('"' == *extnamsrc++) /* caution : pointer increment side-effect */
*extnamdst++ = '"';
}
*extnamdst++ = extnamdelim[3];
*extnamdst++ = extnamdelim[4];
extnam_str.len = 0;
}
memcpy(extnamdst, glob_begin, size);
v->str.len = INTCAST(extnamdst - stringpool.free + size);
v->str.addr = (char *)stringpool.free;
stringpool.free += v->str.len;
assert (v->str.addr < (char *)stringpool.top && v->str.addr >= (char *)stringpool.base);
assert (v->str.addr + v->str.len <= (char *)stringpool.top &&
v->str.addr + v->str.len >= (char *)stringpool.base);
} else /* !found */
v->str.len = 0;
return;
}
